CN117798393A - Upper and lower ring ultrasonic machining device, ultrasonic spindle, ultrasonic machine tool and ultrasonic drill - Google Patents

Abstract

The invention relates to the technical field of ultrasonic processing, and in particular to an upper and lower ring ultrasonic processing device, an ultrasonic spindle, an ultrasonic machine tool and an ultrasonic drill. The upper and lower ring ultrasonic processing device includes a cutter body, a wireless transmission mechanism and an ultrasonic transducer. The wireless transmission mechanism includes a transmitting unit and a receiving unit; when the structural parameters of the transmitting unit and the receiving unit can satisfy the preset relationship with the incoming peak current and apparent power, the apparent power and the incoming peak current can be related to the transmitting unit. Cooperate with the working structural parameters and performance of the receiving unit to reduce the temperature rise of the transmitting unit and the receiving unit in working conditions, improve the efficiency of wireless transmission and the stability of continuous operation of the equipment, and improve the conversion of energy.

Description

An ultrasonic processing device for upper and lower rings, an ultrasonic spindle, an ultrasonic machine tool and an ultrasonic drill

Technical Field

The invention relates to the technical field of ultrasonic machining, and in particular to an upper and lower ring ultrasonic machining device, an ultrasonic spindle, an ultrasonic machine tool and an ultrasonic drill.

Background Art

Advanced materials represented by functional ceramics, optical crystals, high-strength and toughness alloys, ceramic-based composite materials, etc. have excellent mechanical, physical and chemical comprehensive properties. However, these materials are also typical difficult-to-process materials. In the cutting process, there are bottleneck problems such as easy wear of cutting tools, low tool life, poor processing quality, and low processing efficiency. It is difficult to completely solve these problems using traditional mechanical processing methods.

Ultrasonic machining is a machining method that applies micron-level ultrasonic frequency vibration to the tool or workpiece and controls its vibration frequency, amplitude and direction to produce periodic high-frequency separation between the machining tool and the workpiece. A large number of studies and practices have shown that compared with traditional machining, ultrasonic machining technology has significant advantages in inhibiting the generation of microcracks, reducing cutting forces, extending tool life, reducing workpiece burrs, and improving machining efficiency in machining difficult-to-machine metal materials, hard and brittle materials, composite materials and other new materials.

Among them, the ultrasonic machining device is a specific application of ultrasonic machining technology, which can be considered as adding an ultrasonic transducer to an ordinary tool to enable the tool to generate high-frequency vibration during the machining process and improve the machining efficiency.

The existing ultrasonic machining device has an ultrasonic wireless transmission mechanism, which includes a wireless transmitting unit and a wireless receiving unit. The wireless transmitting unit and the wireless receiving unit are arranged relative to each other along the axial direction of the machining tool. When the wireless transmitting unit is powered, the magnetic flux lines of the wireless receiving unit and the wireless transmitting unit are interconnected, and the magnetic flux lines circulate along the axial direction of the machining tool, and the wireless receiving unit powers the ultrasonic transducer.

However, the existing ultrasonic machining devices are not able to link the structural parameters of the ultrasonic wireless transmission mechanism with the peak current and apparent power under its working state. Therefore, during the operation of the equipment, the temperature of the ultrasonic wireless transmission mechanism may rise significantly over time due to the inability of the apparent power and peak current to match the structural parameters of the ultrasonic wireless transmission mechanism, thereby further affecting the working stability, transmission efficiency and service life of the ultrasonic wireless transmission mechanism.

Summary of the invention

The purpose of the present invention is to provide an upper and lower ring ultrasonic processing device, an ultrasonic spindle, an ultrasonic machine tool and an ultrasonic drill which can help improve working stability and transmission efficiency, reduce temperature rise and extend service life.

In order to achieve the above object, the present invention provides an upper and lower ring ultrasonic processing device, comprising:

A knife body, wherein the rear end of the knife body is used to connect with the rotary output device, and the front end of the knife body is provided with a mounting cavity;

a wireless transmission mechanism, the wireless transmission mechanism comprising a transmitting unit and a receiving unit, the transmitting unit being arranged on the outer peripheral side of the knife body, the receiving unit being arranged on the outer peripheral side of the knife body, the transmitting unit and the receiving unit being arranged opposite to each other along the axial direction of the knife body and forming an air gap, the transmitting unit comprising a transmitting coil and a transmitting magnet generating a magnetic field based on a current of the transmitting coil, the receiving unit comprising a receiving coil and a receiving magnet for receiving the magnetic field generated by the transmitting unit; and

an ultrasonic transducer, the ultrasonic transducer being disposed in the mounting cavity and electrically connected to the receiving unit;

The frequency of the electrical signal input to the receiving unit is f Hz, the air gap magnetic resistance of the wireless transmission mechanism is R _δ Henry ^-1 , the magnetic resistance of the transmitting unit is R _transmit Henry ^-1 , and the magnetic resistance of the receiving unit is R _receive Henry ^-1 ;

Wherein, the apparent power of the transmitting unit is _Qemission volt-ampere, the peak current passed through the transmitting unit is _Iemission ampere, and the number of turns of the transmitting coil is _Nemission , then the above parameters satisfy the relationship:

The number of turns of the receiving coil is _Nreceive , the apparent power of the receiving unit is _Qreceive volt-ampere, and the peak current passed through the receiving unit is _Ireceive ampere. Then the above parameters satisfy the relationship:

_K1 is the correction coefficient, _{0.5≤K1≤1.5, 2≤Nreceiving≤240} , _{2≤Ntransmitting≤240} .

In some embodiments of the present invention, the angle at which the emitting unit is arranged along the outer circumference of the blade body is θ. .

In some embodiments of the present invention, θ=2π, the transmitting magnet comprises a first annular bottom plate, a first annular inner plate and a first annular outer plate, the first annular inner plate is connected to the inner side of the first annular bottom plate, the first annular outer plate is connected to the outer side of the first annular bottom plate, a first wire embedding groove with an opening toward the receiving unit is formed between the first annular bottom plate, the first annular inner plate and the first annular outer plate, the transmitting coil is arranged around the first annular inner plate along the circumference of the blade body, and the transmitting coil is accommodated in the first wire embedding groove; wherein the thickness of the first annular bottom plate is H ₃ mm, the thickness of the first annular inner plate is b ₃ mm, the thickness of the first annular outer plate is b ₄ mm, the length of the transmitting magnet extending along the axial direction of the blade body is H ₄ mm, the inner diameter of the first annular inner plate is D ₃ mm, and the outer diameter of the first annular outer plate is D ₄ mm;

The receiving magnet comprises a second annular bottom plate, a second annular inner plate and a second annular outer plate, the second annular inner plate is connected to the inner side edge of the second annular bottom plate, the second annular outer plate is connected to the outer side edge of the second annular bottom plate, a second wire embedding groove with an opening toward the transmitting unit is formed between the second annular bottom plate, the second annular inner plate and the second annular outer plate, the receiving coil is arranged around the second annular inner plate along the circumference of the blade body, and the receiving coil is accommodated in the second wire embedding groove; wherein the thickness of the second annular bottom plate is H ₁ mm, the thickness of the second annular inner plate is b ₁ mm, the thickness of the second annular outer plate is b ₂ mm, the length of the receiving magnet extending along the axial direction of the blade body is H ₂ mm, the inner diameter of the second annular inner plate is D ₁ mm, and the outer diameter of the second annular outer plate is D ₂ mm;

The relative magnetic permeability of the transmitting magnet and the receiving magnet is u, the vacuum magnetic permeability is u ₀ Henry/meter, the magnetic path area of the second annular inner plate is S ₁ , the magnetic path area of the second annular outer plate is S ₂ , and the relationship between S ₁ , S ₂ and the above parameters is as follows:

_R1 is the magnetic resistance of the second annular inner plate, _R2 is the magnetic resistance of the second annular outer plate, _R3 is the magnetic resistance of the second annular bottom plate, and the relationship between the magnetic resistance _Rreceive of the receiving unit and the above parameters is as follows:

The magnetic circuit area of the first annular inner plate is S ₃ , and the magnetic circuit area of the first annular outer plate is S _{4 . The relationship between S 3 , S 4 and the} above parameters is as follows:

_R4 is the magnetic resistance of the first annular inner plate, _R5 is the magnetic resistance of the first annular outer plate, _R6 is the magnetic resistance of the first annular bottom plate, and the relationship between the magnetic resistance _Rtransmit of the transmitting unit and the above parameters is as follows:

.

In some embodiments of the present invention, the air gap equivalent magnetic circuit area between the second annular inner plate and the first annular inner plate is S _δ1 , the air gap equivalent magnetic circuit area between the second annular outer plate and the first annular outer plate is S _δ2 , the vacuum magnetic permeability is u ₀ Henry/meter, R _δ1 is the air gap magnetic resistance between the second annular inner plate and the first annular inner plate, R _δ2 is the air gap magnetic resistance between the second annular outer plate and the first annular outer plate, F ₁ , F ₂ , F ₃ and F ₄ are all edge flux coefficients, and the width of the air gap is δ mm;

When b ₁ =b ₃ , we have:

When b ₂ =b ₄ , we have:

When b ₁ >b ₃ , then w ₁ =b ₁ , w ₂ =b ₃ , D = D ₃ ; when b ₃ >b ₁ , then w ₁ =b ₃ , w ₂ =b ₁ , D = D ₁ , then:

When b ₂ >b ₄ , then w ₁ =b ₂ , w ₂ =b ₄ , D=D ₄ ; when b ₄ >b ₂ , then w ₁ =b ₄ , w ₂ =b ₂ , D=D ₂ , then:

Wherein, K ₂ is the magnetic resistance correction coefficient, 0.2≤K ₂ ≤3.

In some embodiments of the present invention, , the transmitting magnet comprises an arc-shaped bottom plate, an arc-shaped inner plate and an arc-shaped outer plate, the arc-shaped inner plate is connected to the inner side edge of the arc-shaped bottom plate, the arc-shaped outer plate is connected to the outer side edge of the arc-shaped bottom plate, the arc-shaped bottom plate, the arc-shaped outer plate and the arc-shaped inner plate are concentrically arranged, and a first buried wire groove with an opening toward the receiving unit is formed between the arc-shaped bottom plate, the arc-shaped inner plate and the arc-shaped outer plate; wherein the thickness of the arc-shaped bottom plate is H ₃ mm, the thickness of the arc-shaped inner plate is b ₃ mm, the thickness of the arc-shaped outer plate is b ₄ mm, the length of the transmitting magnet extending along the axial direction of the knife body is H ₄ mm, the inner diameter of the arc-shaped inner plate is D ₃ mm, the outer diameter of the arc-shaped outer plate is D ₄ mm, and the transmitting coil is arranged around the arc-shaped bottom plate or the arc-shaped outer plate along the circumference of the knife body;

The receiving magnet comprises a second annular bottom plate, a second annular inner plate and a second annular outer plate, the second annular inner plate is connected to the inner side edge of the second annular bottom plate, the second annular outer plate is connected to the outer side edge of the second annular bottom plate, and a second wire embedding groove with an opening toward the transmitting unit is formed between the second annular bottom plate, the second annular inner plate and the second annular outer plate; wherein the thickness of the second annular bottom plate is H ₁ mm, the thickness of the second annular inner plate is b ₁ mm, the thickness of the second annular outer plate is b ₂ mm, the length of the receiving magnet extending along the axial direction of the knife body is H ₂ mm, the inner diameter of the second annular inner plate is D ₁ mm, the outer diameter of the second annular outer plate is D ₂ mm, and the receiving coil is arranged around the second annular inner plate along the circumference of the knife body;

The relative magnetic permeability of the transmitting magnet and the receiving magnet is u, the vacuum magnetic permeability is u ₀ Henry/meter, the magnetic path area of the second annular inner plate is S ₁ , the magnetic path area of the second annular outer plate is S ₂ , and the relationship between S ₁ and S ₂ and the above parameters is as follows:

_R1 is the magnetic resistance of the second annular inner plate, _R2 is the magnetic resistance of the second annular outer plate, _R3 is the magnetic resistance of the second annular bottom plate, and the relationship between the magnetic resistance _Rreceive of the receiving unit and the above parameters is as follows:

The magnetic circuit area of the arc-shaped inner plate is S ₃ , and the magnetic circuit area of the arc-shaped outer plate is S _{4 . The relationship between S 3 ,} S ₄ and the above parameters is as follows:

_R4 is the magnetic resistance of the arc inner plate, _R5 is the magnetic resistance of the arc outer plate, _R6 is the magnetic resistance of the arc bottom plate, and the relationship between the magnetic resistance _Rtransmit of the transmitting unit and the above parameters is as follows:

.

In some embodiments of the present invention, the air gap equivalent magnetic circuit area between the second annular inner plate and the arc-shaped inner plate is S _δ1 , the air gap equivalent magnetic circuit area between the second annular outer plate and the arc-shaped outer plate is S _δ2 , the vacuum magnetic permeability is u ₀ Henry/meter, R _δ1 is the air gap magnetic resistance between the second annular inner plate and the arc-shaped inner plate, R _δ2 is the air gap magnetic resistance between the second annular outer plate and the arc-shaped outer plate, F ₁ , F ₂ , F ₃ and F ₄ are all edge flux coefficients, and the width of the air gap is δ mm;

When b ₁ =b ₃ , we have:

When b ₂ =b ₄ , we have:

When b ₁ >b ₃ , then w ₁ =b ₁ , w ₂ =b ₃ , D = D ₃ ; when b ₃ >b ₁ , then w ₁ =b ₃ , w ₂ =b ₁ , D = D ₁ , then:

When b ₂ >b ₄ , then w ₁ =b ₂ , w ₂ =b ₄ , D=D ₄ ; when b ₄ >b ₂ , then w ₁ =b ₄ , w ₂ =b ₂ , D=D ₂ , then:

Wherein, K ₂ is the magnetic resistance correction coefficient, 0.2≤K ₂ ≤3.

In some embodiments of the present invention, a launching frame and a receiving frame are further included, wherein the launching frame and the receiving frame are arranged relative to each other along the axial direction of the blade body, a first accommodating groove is provided on one end surface of the launching frame facing the receiving frame, and a second accommodating groove is provided on one end surface of the receiving frame facing the launching frame, the launching unit is accommodated in the first accommodating groove, and the receiving unit is accommodated in the second accommodating groove, and the outer peripheral surface of the blade body is provided with a limiting convex ring protruding along its radial direction, and the receiving frame is sleeved and fixed on the outer periphery of the blade body and abuts against the rear end face of the limiting convex ring.

In some embodiments of the present invention, the width of the air gap is δ mm, 0.1≤δ≤3.

In some embodiments of the present invention, a variable amplitude rod is further included, and the ultrasonic transducer includes a piezoelectric vibrator, a screw rod and a back cover. The screw rod is arranged in the installation cavity and extends along the axial direction of the blade body. The rear end of the variable amplitude rod is fixedly connected to the screw rod, and the piezoelectric vibrator is sleeved on the screw rod. The rear end face of the variable amplitude rod protrudes from the outer circumferential surface of the screw rod in the radial direction of the screw rod. The back cover is threadedly connected to the screw rod and cooperates with the rear end face of the variable amplitude rod to limit the piezoelectric vibrator.

In some embodiments of the present invention, a collet and a nut are further included for being sleeved on the outer periphery of the processing tool. The front end of the amplitude changing rod is provided with a socket extending toward the rear end. The inner circumference of the socket is a cone with a diameter gradually decreasing from front to back. The collet can be inserted into the socket in cooperation with the processing tool. The nut can be threadedly connected to the amplitude changing rod and press against the collet to lock the processing tool.

In some embodiments of the present invention, the collet comprises a conical barrel section adapted to the insertion hole, the collet has a plurality of first deformation grooves spaced apart along its circumference, and the first deformation grooves extend to or extend through the conical barrel section;

The first deformation groove connects the outer side surface and the inner side surface of the collet. The first deformation groove penetrates the conical cylinder section backward along the axial direction of the collet from the front end surface of the collet and extends to the rear end surface of the collet. The rear groove surface of the first deformation groove and the rear end surface of the collet have a first gap.

In some embodiments of the present invention, the collet has a plurality of second deformation grooves spaced apart along its circumference, the second deformation grooves extend to or extend through the cone section, and the second deformation grooves are spaced apart from the first deformation grooves and are arranged in a staggered manner;

A front groove surface of the second deformation groove has a second interval with the front end surface of the collet, and the second deformation groove extends and passes through the rear end surface of the collet.

In some embodiments of the present invention, the transmitting magnet is made of any one of ferrite, neodymium iron boron, high-frequency ceramic material, powder metallurgy material, amorphous and nanocrystalline alloy, and cobalt iron; the receiving magnet is made of any one of ferrite, neodymium iron boron, high-frequency ceramic material, powder metallurgy material, amorphous and nanocrystalline alloy, and cobalt iron.

The present invention also provides an ultrasonic spindle, comprising a first rotation output unit, a machining tool and the above-mentioned upper and lower ring ultrasonic machining device, wherein the rear end of the tool body is assembled on the first rotation output unit, and the machining tool is assembled on the ultrasonic transducer.

The present invention also provides an ultrasonic machine tool, comprising a machine tool body and the ultrasonic spindle mentioned above, wherein the ultrasonic spindle is mounted on the machine tool body.

The present invention also provides an ultrasonic drill, comprising a shell, a second rotary output unit, a machining tool, a bearing and the above-mentioned upper and lower ring ultrasonic machining devices, the front end face of the shell is provided with a rearwardly extending accommodating cavity, the rear end of the tool body is accommodated in the accommodating cavity and connected to the output end of the second rotary output unit, and the tool body is connected to the shell through the bearing, the transmitting unit is arranged in the accommodating cavity and connected to the shell, the receiving unit is arranged in the accommodating cavity and connected to the tool body, and the machining tool is connected to the ultrasonic transducer.

The implementation of the embodiments of the present invention has the following technical effects:

The upper and lower ring ultrasonic processing device provided by the present invention comprises a cutter body, a wireless transmission mechanism and an ultrasonic transducer, wherein the rear end of the cutter body can be connected to a rotating output device, the receiving unit of the wireless transmission mechanism is connected to the cutter body, the transmitting unit is connected to the rotating output device or other external equipment, the transmitting unit and the receiving unit are arranged relatively to each other along the axial direction of the cutter body and an air gap is formed, so that when the rotating output device drives the cutter body to rotate, the receiving unit can rotate relative to the transmitting unit, and at the same time, the receiving unit and the transmitting unit can transmit electric energy through magnetic induction, so that the receiving unit can provide electric energy to drive the ultrasonic transducer to vibrate, so that when the processing tool is connected to the upper and lower ring ultrasonic processing device, it can generate vibration while rotating, so as to improve the processing effect and the applicable scope of the processing;

Furthermore, the structural parameters of the transmitting unit and the receiving unit are based on the relationship:

A reasonable design is carried out so that when the transmitting unit and the receiving unit are in working state, the peak current and apparent power passed through can be coordinated with the structural parameters and performance of the transmitting unit and the receiving unit, thereby reducing the temperature rise of the wireless transmission mechanism in the working state and improving the efficiency of wireless transmission and the stability of continuous operation of the equipment; further, based on reasonable processing requirements, the increase range of the amplitude can be basically consistent with the increase range of the apparent power, which can help avoid the conversion of energy into heat consumption and improve the energy conversion rate.

The ultrasonic spindle, ultrasonic machine tool and ultrasonic drill provided by the present invention having the upper and lower ring ultrasonic processing device also have the effects of low temperature rise during operation and high continuous working stability.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be described in more detail below with the aid of the accompanying drawings. Regardless of a specific combination of technical features, the technical features shown in the accompanying drawings and/or described below are generally technical features of the present invention and improve the present invention accordingly.

It should be noted that in different drawings, the same reference numerals denote the same or substantially the same components.

FIG1 is a schematic structural diagram of a preferred embodiment 1 of the present invention;

FIG2 is a front view of a partial structure of the embodiment shown in FIG1 ;

Fig. 3 is a cross-sectional view of the section Ⅰ-Ⅰ in Fig. 2;

FIG4 is an enlarged schematic diagram of point B in FIG3 ;

5 is a cross-sectional view of the transmitting ferrite and the receiving ferrite of FIG. 3 along the front-to-back direction;

FIG6 is a schematic perspective view of a partial structure of the embodiment shown in FIG1 ;

FIG7 is an exploded view of a local structure of the embodiment shown in FIG1 ;

Fig. 8 is a schematic structural diagram of a collet;

FIG9 is a schematic diagram of the structure of a preferred embodiment 2 of the present invention;

FIG10 is a front view of a partial structure of the embodiment shown in FIG9;

Fig. 11 is a cross-sectional view at II-II in Fig. 10;

FIG12 is an enlarged schematic diagram of point C in FIG11;

FIG13 is a schematic diagram of the structure of the transmitting ferrite and the receiving ferrite of the embodiment shown in FIG9;

FIG14 is a schematic diagram of the planar structure of the transmitting ferrite and the receiving ferrite of the embodiment shown in FIG9;

Fig. 15 is a cross-sectional view of III-III in Fig. 14;

FIG16 is a schematic diagram of the planar structure of the emitting ferrite of FIG13;

FIG17 is a cross-sectional view of a preferred embodiment 4 of the present invention;

FIG. 18 is an enlarged schematic diagram of point A in FIG. 17 .

Description of reference numerals:

100, ultrasonic main shaft, 110, first rotation output unit, 111, end cover, 112, bracket;

200, ultrasonic drill, 210, housing, 211, accommodating chamber, 220, second rotation output unit, 221, gripping handle, 230, bearing;

10. Ultrasonic processing device;

20. Processing tools;

1. blade body, 11. mounting cavity, 12. limiting convex ring, 2. ultrasonic transducer, 21. piezoelectric vibrator, 22. screw, 23. back cover, 24. amplitude transformer, 241. jack, 3. wireless transmission mechanism, 31. transmitting unit, 311. transmitting coil, 312. transmitting ferrite, 312a. first annular bottom plate, 312b. first annular inner plate, 312c. first annular outer plate, 312d. first buried wire groove, 312e. arc bottom plate, 312f. arc inner plate, 312g. Arc-shaped outer plate, 32, receiving unit, 321, receiving coil, 322, receiving ferrite, 322a, second annular bottom plate, 322b, second annular inner plate, 322c, second annular outer plate, 322d, second buried wire groove, 33, launching frame, 331, first accommodating groove, 34, receiving frame, 341, second accommodating groove, 4, air gap interval, 5, collet, 51, conical cylinder section, 52, first deformation groove, 53, second deformation groove, 54, first interval, 55, second interval, 6, nut.

DETAILED DESCRIPTION

The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

First, it should be noted that the top, bottom, upward, downward and other directions mentioned in this article are defined relative to the directions in the drawings. They are relative concepts and can therefore be changed according to different positions and different practical states, so these or other directions should not be understood as restrictive terms. At the same time, the term "comprising" does not exclude other elements or steps, and "a" or "an" does not exclude plural numbers.

In addition, it should be pointed out that any single technical feature described or implied in the embodiments of this document, or any single technical feature shown or implied in the drawings, can still be combined between these technical features (or their equivalents) to obtain other embodiments of the present invention that are not directly mentioned in this document.

In addition, it should be understood that the terms "first", "second", etc. are used herein to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

Embodiment 1:

1, 2 and 3, an embodiment of the present invention provides an upper and lower ring ultrasonic machining device (hereinafter referred to as ultrasonic machining device 10), including a cutter body 1, an ultrasonic transducer 2 and a wireless transmission mechanism 3. The rear end of the cutter body 1 is assembled on the first rotation output unit 110 and rotates synchronously with the first rotation output unit 110, so that the first rotation output unit 110 is connected to the cutter body 1 as the rotation output device of this embodiment and outputs torque.

Among them, the wireless transmission mechanism 3 is wound around the outer peripheral side of the blade body 1. Specifically, as shown in Figures 3 and 4, the wireless transmission mechanism 3 in this embodiment includes a transmitting unit 31 and a receiving unit 32. The transmitting unit 31 is arranged on the outer peripheral side of the blade body 1, and the receiving unit 32 is arranged on the outer peripheral side of the blade body 1. The transmitting unit 31 and the receiving unit 32 are arranged opposite to each other along the axial direction of the blade body 1 and form an air gap 4. The transmitting unit 31 includes a transmitting coil 311 and a transmitting magnet that generates a magnetic field based on the current of the transmitting coil 311. The receiving unit 32 includes a receiving coil 321 and a receiving magnet for receiving the magnetic field generated by the transmitting unit 31.

In different embodiments, the transmitting magnet can be made of any one of ferrite, neodymium iron boron, high-frequency ceramic materials, powder metallurgy materials, amorphous and nanocrystalline alloys, and cobalt iron; the receiving magnet can be made of any one of ferrite, neodymium iron boron, high-frequency ceramic materials, powder metallurgy materials, amorphous and nanocrystalline alloys, and cobalt iron.

Specifically, the transmitting magnet and the receiving magnet in this embodiment are both made of ferrite material. Therefore, in the following of this embodiment, the transmitting magnet is referred to as the transmitting ferrite 312, and the receiving magnet is referred to as the receiving ferrite 322. Further, the transmitting unit 31 is in a full circle ring shape or a non-full circle ring shape arranged around the outer circumference of the blade body 1. It can be understood that the angle of the transmitting unit 31 around the outer circumference of the blade body 1 is θ. , preferably, Specifically, θ is the central angle corresponding to the circumferential extension of the emitting ferrite 312 along the blade body 1.

In this embodiment, 3, 4 and 5, the transmitting ferrite 312 in this embodiment is accommodated in the first accommodating groove 331 and is arranged around the outer peripheral side of the blade body 1, and the front end surface of the transmitting ferrite 312 is provided with a first buried wire groove 312d arranged around the blade body 1, and the transmitting coil 311 is accommodated in the first buried wire groove 312d. Specifically, the transmitting ferrite 312 in this embodiment includes a first annular bottom plate 312a, a first annular inner plate 312b and a first annular outer plate 312c, the first annular inner plate 312b is connected to the inner side edge of the first annular bottom plate 312a, the first annular outer plate 312c is connected to the outer side edge of the first annular bottom plate 312a, and the first annular bottom plate 312a, the first annular inner plate 312b and the first annular outer plate 312c form a first buried wire groove 312d opening toward the receiving unit 32; wherein the thickness of the first annular bottom plate 312a is H ₃ mm, the thickness of the first annular inner plate 312b is b ₃ mm, the thickness of the first annular outer plate 312c is b ₄ mm, the length of the emitting ferrite 312 extending along the axial direction of the blade body is H ₄ mm, the inner diameter of the first annular inner plate 312b is D ₃ mm, and the outer diameter of the first annular outer plate 312c is D ₄ mm.

The receiving ferrite 322 is accommodated in the second accommodating groove 341 and is arranged on the outer peripheral side of the blade body 1, and the rear end surface of the receiving ferrite 322 is provided with a second wire embedding groove 322d arranged on the blade body 1, and the receiving coil 321 is accommodated in the second wire embedding groove 322d. Specifically, the receiving ferrite 322 in this embodiment includes a second annular bottom plate 322a, a second annular inner plate 322b and a second annular outer plate 322c, the second annular inner plate 322b is connected to the inner side edge of the second annular bottom plate 322a, the second annular outer plate 322c is connected to the outer side edge of the second annular bottom plate 322a, and a second wire embedding groove 322d opening toward the transmitting unit 31 is formed between the second annular bottom plate 322a, the second annular inner plate 322b and the second annular outer plate 322c; wherein, the thickness of the second annular bottom plate 322a is H ₁ mm, and the thickness of the second annular inner plate 322b is b ₁ mm, the thickness of the second annular outer plate 322c is b ₂ mm, the length of the receiving ferrite 322 extending along the axial direction of the blade body is H ₂ mm, the inner diameter of the second annular inner plate 322b is D ₁ mm, and the outer diameter of the second annular outer plate 322c is D ₂ mm.

Preferably, the parameters of the transmitting ferrite 312 and the receiving ferrite 322 can be measured by using a Mitutoyo percentage caliper or other tools for measuring length.

The relative magnetic permeability of the transmitting ferrite 312 and the receiving ferrite 322 is u, the vacuum magnetic permeability is u ₀ Henry/meter, the magnetic path area of the second annular inner plate 322b is S ₁ , the magnetic path area of the second annular outer plate 322c is S ₂ , and the relationship between S ₁ , S ₂ and the above parameters is as follows:

.................(1)

.................(2)

_R1 is the magnetic resistance of the second annular inner plate 322b, _R2 is the magnetic resistance of the second annular outer plate 322c, and _R3 is the magnetic resistance of the second annular bottom plate 322a. The relationship between the magnetic resistance _Rreceive of the receiving unit 32 and the above parameters is as follows:

.................(3)

.................(4)

.................(5)

.................(6)

The magnetic circuit area of the first annular inner plate 312b is S ₃ , _{and the magnetic circuit area of the first annular outer plate 312c is S 4 . The relationship between S 3 and} S ₄ and the above parameters is as follows:

.................(7)

.................(8)

_R4 is the magnetic resistance of the first annular inner plate 312b, _R5 is the magnetic resistance of the first annular outer plate 312c, and _R6 is the magnetic resistance of the first annular bottom plate 312a. The relationship between the magnetic resistance _Rtransmit of the transmitting unit 31 and the above parameters is as follows:

.................(9)

.................(10)

.................(11)

.................(12)

The air gap magnetic resistance of the wireless transmission mechanism 3 is R _δ Henry ^-1 , the width of the air gap interval is δ mm, the air gap equivalent magnetic circuit area between the second annular inner plate 322b and the first annular inner plate 312b is S _δ1 , the air gap equivalent magnetic circuit area between the second annular outer plate 322c and the first annular outer plate 312c is S _δ2 , the vacuum magnetic permeability is u ₀ Henry/m, R _δ1 is the air gap magnetic resistance between the second annular inner plate 322b and the first annular inner plate 312b, R _δ2 is the air gap magnetic resistance between the second annular outer plate 322c and the first annular outer plate 312c, F ₁ , F ₂ , F ₃ and F ₄ are all edge magnetic flux coefficients, which are used to correct the influence of the edge air gap magnetic resistance on the air gap magnetic resistance;

When b ₁ =b ₃ , we have:

.................(13)

.................(14)

.................(15)

When b ₂ =b ₄ , we have:

.................(16)

.................(17)

.................(18)

When b ₁ >b ₃ , then w ₁ =b ₁ , w ₂ =b ₃ , D = D ₃ ; when b ₃ >b ₁ , then w ₁ =b ₃ , w ₂ =b ₁ , D = D ₁ , then:

.............(19)

.......(20)

When b ₂ >b ₄ , then w ₁ =b ₂ , w ₂ =b ₄ , D=D ₄ ; when b ₄ >b ₂ , then w ₁ =b ₄ , w ₂ =b ₂ , D=D ₂ , then:

............(twenty one)

....(twenty two)

Therefore, the relationship between the air gap magnetic resistance R _δ of the wireless transmission mechanism 3 and the above parameters is as follows:

.................(twenty three)

Among them, K ₂ is the reluctance correction coefficient, 0.2≤K ₂ ≤3, and the value range of K ₂ is based on: F ₁ , F ₂ , F ₃ and F ₄ are general expressions for correcting the air gap reluctance while considering the edge air gap reluctance. However, under different air gap intervals, the magnetic circuit shape of the magnetic field is different, and the magnetic field segmentation is complex. It is difficult for F ₁ , F ₂ , F ₃ and F ₄ to accurately correct the air gap reluctance. In order to make the calculation of air gap magnetic resistance more accurate under different air gap intervals, it is necessary to introduce parameter _K2 to correct the air gap magnetic resistance; preferably, 0.1≤δ≤3. Specifically, in different embodiments, the air gap width δ is the distance between the transmitting unit 31 and the receiving unit 32, which can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm; preferably, the air gap width δ is 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm.

Wherein, the inductance of the transmitting unit 31 is L _dtransmit Henry, the air gap magnetic resistance of the wireless transmission mechanism 3 is R _δ Henry ^-1 , the magnetic resistance of the transmitting unit 31 is _Rtransmit Henry ^-1 , the magnetic resistance of the receiving unit 32 is _Rreceive Henry ^-1 , and the number of turns of the transmitting coil 311 is _Ntransmit , then:

.................(twenty four)

Based on the above structure of the ultrasonic machining device 10 disclosed in the present embodiment, the frequency of the electrical signal input to the receiving unit 32 is defined as f Hz, the peak current of the transmitting unit 31 is I _transmit ampere, the magnetic resistance of the transmitting unit 31 is R _transmit Henry ^-1 , the number of turns of the transmitting coil 311 is N _transmit , the magnetic resistance of the receiving unit 32 is R _receive Henry ^-1 , the air gap magnetic resistance of the wireless transmission mechanism 3 is R _δ Henry ^-1 , and the apparent power of the transmitting unit 31 is Q _transmit volt-ampere. Then the above parameters satisfy the relationship:

.................(25)

Specifically, by substituting the above equation (24) into equation (25), the relationship between the apparent power _Qtransmit of the transmitting unit 31 and the above parameters in this embodiment can be obtained:

.................(26)

The inductance of the receiving unit 32 is L _dreceive Henry, the number of turns of the receiving coil 321 is _Nreceive , and the air gap magnetic resistance of the wireless transmission mechanism 3 is R _δ Henry ^-1 , then:

.................(27)

Wherein, the peak current of the receiving unit 32 is _Ireceived ampere, the magnetic resistance of the transmitting unit 31 _is Rtransmitted Henry ^-1 , the magnetic resistance of the receiving unit 32 is _Rreceived Henry ^-1 , the air gap magnetic resistance of the wireless transmission mechanism 3 is _Rδ Henry ^-1 , the apparent power of the receiving unit 32 is _Qreceived volt-ampere, and the number of turns of the receiving coil 321 is _Nreceived . Then the above parameters satisfy the relationship:

.................(28)

Substituting the above equation (27) into equation (28), the relationship between the apparent power _Qreceived of the receiving unit 32 and the above parameters in this embodiment can be obtained:

.................(29)

It should be noted that, since some parameters in the relational expressions (1)-(29) need to be measured by the ultrasonic machining device 10, in order to avoid errors in the measured data, K ₁ is set, K ₁ is a correction coefficient, 0.5≤K ₁ ≤1.5, which is used to correct the error between the calculated apparent power and the optimal apparent power caused by the human or equipment measurement error in the data measurement process, such as the measurement error of the frequency of the electrical signal input to the receiving unit, the measurement error of the peak current, etc. The measurement error of the frequency of the electrical signal is generally 15%, and the measurement error of the peak current is 20%; therefore, it can be understood that when there is no error in the measured parameters, preferably, K ₁ =1; wherein, 2≤N _transmit ≤240, 2≤N _receive ≤240;

In this way, the apparent power of the transmitting unit 31 and the receiving unit 32 obtained based on the relations (26) and (29), when the peak current passed through the transmitting unit 31 and the receiving unit 32 of the ultrasonic machining device 10 provided in this embodiment works under the condition of the apparent power obtained based on the above relations after the current is passed through, the apparent power and the peak current passed through can be matched with the structural parameters and performance of the transmitting unit 31 and the receiving unit 32 of the wireless transmission mechanism 3, thereby reducing the temperature rise of the wireless transmission mechanism 3 in the working state and improving the efficiency of wireless transmission and the stability of continuous operation of the equipment; further, based on the reasonable requirements of machining, such as the general requirement for machining amplitude of 1μm-10μm, at this time, the increase in amplitude can be basically consistent with the increase in apparent power, and can help avoid the conversion of energy into heat consumption and improve the energy conversion rate.

Specifically, in order to verify that the receiving unit 32 and the transmitting unit 31 of the ultrasonic machining device 10 provided in the embodiment of the present invention have a lower temperature rise than the prior art after matching the peak current and the apparent power based on the above relationship, and have an increase in amplitude substantially the same as the increase in apparent power, two groups of tests were conducted, refer to the following table:

In Table 1A and Table 1B, the transmitting unit 31 and the receiving unit 32 of the first ultrasonic machining device are reasonably designed based on the relationship between the parameters of the above relationship, and the first ultrasonic machining device is tested after the current is passed through. At the same time, based on the structural parameters of the first ultrasonic machining device, the transmitting unit 31 is based _on the relationship (1)-(26) to obtain the apparent power Q1 of the transmitting unit 31:

And combined with the correction factor _K1, the setting range of Q1 _emission is obtained;

The receiving unit 32 obtains the apparent power Q1 _{received by} the receiving unit 32 based on equations (1)-(23) and (27)-(29):

And combined with the correction coefficient _K1, the setting range of Q1 _reception is obtained;

After the first ultrasonic machining device is supplied with current, the temperature rise measurement result of the first ultrasonic machining device in the working state within the preset time t is obtained after the transmitting unit 31 _transmits at the apparent power Q2 and the receiving unit 32 _receives at the apparent power Q2. At this time, since the transmitting unit 31 and the receiving unit 32 of the first ultrasonic machining device are reasonably designed based on the relationship between the parameters of the above relationship, Q2 _transmission is within the setting range of Q1 _transmission , and Q2 _reception is within the setting range of Q1 _reception . Specifically, 0.5≤K ₁ ≤1.5;

In addition, referring to Table 2A and Table 2B, a second ultrasonic machining device of the prior art is set as a comparative example, and the structural parameters of the transmitting unit 31 and the receiving unit 32 of the second ultrasonic machining device are obtained. The structural parameters of the transmitting unit 31 of the second ultrasonic machining device are substituted into the relationship (1)-(26), and the apparent power Q3 of the transmitting unit 31 of the second ultrasonic machining device is obtained if the transmitting unit 31 of the second ultrasonic machining device is reasonably _designed :

And combined with the correction factor K _1, the setting range of Q3 _emission is obtained;

Substituting the structural parameters of the receiving unit 32 of the second ultrasonic machining device into equations (1)-(23) and (27)-(29) yields the following: If the receiving unit 32 of the second ultrasonic machining device is reasonably designed, the apparent power Q3 _received by the receiving unit 32 is:

And combined with the correction coefficient K _1, the setting range of Q3 _reception is obtained, specifically, 0.5≤K ₁ ≤1.5;

After the current is passed through the second ultrasonic machining device, the actual apparent power Q4 _transmission of the transmitting unit 31 and the actual apparent power Q4 _reception of the receiving unit 32 are measured, and after working for a preset time t, the temperature rise measurement result of the second ultrasonic machining device in the working state within the preset time t is obtained. At this time, Q4 _transmission is not within the setting range of Q3 _transmission , and Q4 _reception is not within the setting range of Q3 _reception . Therefore, the structural parameters and performance of the transmitting unit 31 and the receiving unit 32 of the second ultrasonic machining device do not match, and the design of the transmitting unit 31 and the receiving unit 32 of the second ultrasonic machining device is unreasonable.

The test method is:

When the ambient temperature is 24°C, the air gap width δ between the transmitting unit 31 and the receiving unit 32 of the first ultrasonic machining device and the second ultrasonic machining device is set to be 0.3 mm, the transmitting unit 31 is connected to the ultrasonic generator, the receiving unit 32 is connected to the ultrasonic transducer 2, and the receiving unit 32 and the transmitting unit 31 are connected to the Yokogawa power oscilloscope, and the input peak current _{Itransmission} and the apparent power _{Qtransmission} of the transmitting unit 31, the input peak current _Ireception and the apparent power _Qreception of the receiving unit 32 are respectively collected, and the frequency f of the electrical signal input to the receiving unit 32 is detected by the Tektronix oscilloscope.

It should be noted that Table 1A and Table 1B are the temperature rise data of the receiving unit 32 and the transmitting unit 31, and the amplitude size data generated by the processing tool 20 connected thereto, for a first ultrasonic processing device designed in accordance with the above-mentioned relational expressions (26) and (29) of the present invention. At a preset ambient temperature, when currents of different magnitudes are respectively passed through and the working time is continuously set to 10 minutes respectively, Table 2A and Table 2B are the temperature rise data of the receiving unit 32 and the transmitting unit 31, and the amplitude size data generated by the processing tool 20 connected thereto, for a second ultrasonic processing device designed not in accordance with the above-mentioned relational expressions (26) and (29) of the present invention. At a preset ambient temperature, when currents of different magnitudes are respectively passed through and the working time is continuously set to 10 minutes respectively, Table 2A and Table 2B are the temperature rise data of the receiving unit 32 and the transmitting unit 31, and the amplitude size data generated by the processing tool 20 connected thereto, for a second ultrasonic processing device designed not in accordance with the above-mentioned relational expressions (26) and (29) of the present invention.

It can be seen from Table 1A and Table 1B that the ultrasonic machining device 10 is reasonably designed based on the relationship of the present invention, so that the structural parameters and performance of the transmitting unit 31 and the receiving unit 32 can cooperate with the peak current and apparent power passed through, and during the operation, the temperature rise of the wireless transmission mechanism 3 in the working state can be reduced, and the efficiency of wireless transmission and the stability of continuous operation of the equipment can be improved; further, when the structural parameters and performance of the transmitting unit 31 and the receiving unit 32 can cooperate with the peak current and apparent power passed through, more energy of the ultrasonic machining device 10 can be effectively used for work. When working with different apparent powers, after the machining tool 20 is installed, the amplitude increase corresponding to the machining end of the machining tool 20 can be basically the same as the increase in the apparent power of the first ultrasonic machining device, thereby maintaining a higher energy conversion rate.

It can be seen from Table 2A and Table 2B that the temperature rise of the second ultrasonic machining device in Table 2A and Table 2B is significantly higher than that of the first ultrasonic machining device in Table 1A and Table 1B, and when the second ultrasonic machining device is installed with the machining tool 20, the amplitude increase generated by the machining end of the machining tool 20 is significantly different from the increase in the apparent power of the second ultrasonic machining device, resulting in a small change in the amplitude while the apparent power increases, and a low energy conversion rate; that is, the structural parameters and performance of the transmitting unit 31 and the receiving unit 32 of the second ultrasonic machining device do not match. Therefore, the transmitting unit 31 and the receiving unit 32 of the second ultrasonic machining device are not matched. The design of 2 is unreasonable. During the operation of this type of second ultrasonic machining device, the energy of its wireless transmission mechanism 3 will have a higher proportion of heat energy consumption, resulting in the temperature rise rate of this type of second ultrasonic machining device being significantly higher than that of the first ultrasonic machining device in Table 1A and Table 1B, and the amplitude generated by the machining end of the machining tool 20 of this type of second ultrasonic machining device has a large increase range and a large difference from the increase range of the apparent power, resulting in that when the apparent power of this type of second ultrasonic machining device increases, the amplitude change of the machining tool 20 lags and changes less, and the overall energy effective conversion rate of the wireless transmission mechanism 3 is low.

It should be noted that the apparent powers Q2 _transmission , Q2 _reception , Q4 _transmission , Q4 _reception , and the peak currents I _transmission and I _reception of the first ultrasonic machining device and the second ultrasonic machining device are all measured by a Yokogawa power oscilloscope (model: PX8000). Specifically, this embodiment 1 provides a measurement method as follows:

Connect the CH1 voltage probe of the Yokogawa power oscilloscope to the positive and negative poles of the transmitting unit 31 respectively, and connect the CH1 current probe to the transmitting unit 31, with the direction of the CH1 current probe flowing from the positive pole to the negative pole;

Connect the CH2 voltage probe of the Yokogawa power oscilloscope to the positive and negative poles of the receiving unit 32 respectively, and connect the CH2 current probe to the receiving unit 32, with the direction of the CH2 current probe flowing from the positive pole to the negative pole;

Press the ELEM1 button to open the CH1 measurement channel; press the U1 button and select voltage measurement, press the I1 button and select current measurement; press the P1 button to select power measurement;

Press the ELEM2 button to open the CH2 measurement channel; press the U2 button and select voltage measurement; press the I2 button and select current measurement; press the P2 button and select power measurement;

After pressing the "MODE" button, select the "Numeric+Wave" mode in the "DISPLAY MODE" menu; press the "SETTING" button, and in the "NUMERIC SETTING" menu, set the "Format" to "16Items";

Press the "START/STOP" button to start the test, and obtain the apparent power and peak current of the transmitting unit 31 and the receiving unit 32 through the data displayed on the screen, where I+pk1 represents the CH1 current peak, that is, the peak current passed through the transmitting unit 31; S1 represents the CH1 apparent power, that is, the apparent power of the transmitting unit 31; I+pk2 represents the CH2 current peak-to-peak value, that is, the peak current passed through the receiving unit 32; S2 represents the CH2 apparent power, that is, the apparent power of the receiving unit 32.

In addition, in the first ultrasonic machining device and the second ultrasonic machining device, the frequency f of the electrical signal input to the receiving unit 32 is measured by a Tektronix oscilloscope (model: MDO3024). Specifically, this embodiment 1 provides a measurement method as follows:

Insert the differential probe into the CH1 interface and connect it to the positive and negative electrodes of the receiving unit 32 respectively;

Open the "Menu" option, select "Edge" in the "Type" item, select "1" in the "Source" item, select "AC" in the "Coupling" item, select "Rising Edge" in the "Slope" item, set it to "0V" in the "Level" item, and select "Auto" in the "Mode" option;

Press the "1" button to turn on the CH1 measurement channel, and select AC coupling mode in the options that pop up at the bottom of the screen; press the "Measure" button in the Wave Inspector button area, select "Add measurement" in the options that pop up at the bottom of the screen, and select "1" in the "Source" item. After selecting "Frequency" in the "Measurement Type" item, select "OK to add measurement";

Press “Run/Stop” to start the test, wait for the ultrasonic power supply frequency sweep to be completed, then read and record the measured frequency on the screen. This frequency is the frequency f of the electrical signal input to the receiving unit 32 .

It should be noted that, in the present embodiment, the transmitting ferrite 312 and the receiving ferrite 322 of the first ultrasonic machining device and the second ultrasonic machining device are both made of manganese-zinc ferrite material, and the relative magnetic permeability u is 2500; the apparent power Q2 _transmission , Q2 _reception , Q4 _transmission , Q4 _reception , and the peak input current I _transmission , I _reception in the above-mentioned first ultrasonic machining device and the second ultrasonic machining device are all measured by a Yokogawa power oscilloscope (model: PX8000); in the first ultrasonic machining device and the second ultrasonic machining device, the frequency f of the electrical signal input to the receiving unit 32 is measured by a Tektronix oscilloscope (model: MDO3024);

In addition, the first ultrasonic processing device and the second ultrasonic processing device in this embodiment are both equipped with a D6 flat-bottomed milling cutter, whose tool length is 20 mm. In different tests, different processing tools and corresponding tool lengths can also be used, such as: D4 tungsten steel rod, the tool length is 20 mm; D16 flat-bottomed milling cutter, the tool length is 50 mm.

Embodiment 2:

Referring to Figures 9-16, the difference between this embodiment and embodiment 1 is that: It should be noted that the transmitting magnet and the receiving magnet in this embodiment are both made of ferrite materials. Therefore, in the following text of this embodiment, the transmitting magnet is referred to as the transmitting ferrite 312, and the receiving magnet is referred to as the receiving ferrite 322.

Further, referring to Figures 12-15, the transmitting ferrite 312 is accommodated in the first accommodating groove 331, and the front end surface of the transmitting ferrite 312 is provided with a first buried wire groove 312d. Specifically, the transmitting ferrite 312 in this embodiment includes an arc-shaped bottom plate 312e, an arc-shaped inner plate 312f and an arc-shaped outer plate 312g, the arc-shaped inner plate 312f is connected to the inner side edge of the arc-shaped bottom plate 312e, and the arc-shaped outer plate 312g is connected to the outer side edge of the arc-shaped bottom plate 312e. Preferably, the arc-shaped bottom plate 312e, the arc-shaped outer plate 312g and the arc-shaped inner plate 312f are concentrically arranged, and a first buried wire groove 312d opening toward the receiving unit 32 is formed between the arc-shaped bottom plate 312e, the arc-shaped inner plate 312f and the arc-shaped outer plate 312g; wherein, the thickness of the arc-shaped bottom plate 312e is H ₃ mm, and the thickness of the arc-shaped inner plate 312f is b ₃ mm, the thickness of the arc-shaped outer plate 312g is b ₄ mm, the length of the emitting ferrite 312 extending along the axial direction of the blade body is H ₄ mm, the inner diameter of the arc-shaped inner plate 312f is D ₃ mm, and the outer diameter of the arc-shaped outer plate 312g is D ₄ mm.

11-16, the transmitting coil 311 is arranged around the arc-shaped bottom plate 312e or the arc-shaped outer plate 312g. The transmitting coil 311 in this embodiment is arranged around the arc-shaped outer plate 312g and is partially buried in the first buried wire groove 312d. Based on this structure, the magnetic flux lines generated by the transmitting coil 311 after being energized are emitted from the front end surface of the arc-shaped outer plate 312g to the receiving unit 32, and flow back from the front end surface of the arc-shaped inner plate 312f after being transmitted by the receiving unit 32.

11-16, the receiving ferrite 322 is accommodated in the second accommodating groove 341, and the rear end surface of the receiving ferrite 322 is provided with a second wire embedding groove 322d arranged in a ring around the blade body 1, and the receiving coil 321 is accommodated in the second wire embedding groove 322d. Specifically, the receiving ferrite 322 in this embodiment includes a second annular bottom plate 322a, a second annular inner plate 322b and a second annular outer plate 322c, the second annular inner plate 322b is connected to the inner side edge of the second annular bottom plate 322a, the second annular outer plate 322c is connected to the outer side edge of the second annular bottom plate 322a, and a second wire embedding groove 322d opening toward the transmitting unit 31 is formed between the second annular bottom plate 322a, the second annular inner plate 322b and the second annular outer plate 322c; wherein, the thickness of the second annular bottom plate 322a is H ₁ mm, the thickness of the second annular inner plate 322b is b ₁ mm, and the thickness of the second annular outer plate 322c is b ₂ mm, the length of the receiving ferrite 322 extending along the axial direction of the blade body is H ₂ mm, the inner diameter of the second annular inner plate 322b is D ₁ mm, and the outer diameter of the second annular outer plate 322c is D ₂ mm.

The relative magnetic permeability of the transmitting ferrite 312 and the receiving ferrite 322 is u, the vacuum magnetic permeability is u ₀ Henry/meter, the magnetic path area of the second annular inner plate 322b of the receiving ferrite 322 is S ₁ , and the magnetic path area of the second annular outer plate 322c is S ₂ . The relationship between S ₁ and S ₂ and the above parameters is as follows:

.................(30)

.................(31)

_R1 is the magnetic resistance of the second annular inner plate 322b, _R2 is the magnetic resistance of the second annular outer plate 322c, and _R3 is the magnetic resistance of the second annular bottom plate 322a. The relationship between the magnetic resistance _Rreceive of the receiving unit 32 and the above parameters is as follows:

.................(32)

.................(33)

.................(34)

.................(35)

The magnetic circuit area of the arc-shaped inner plate 312f is S ₃ , and the magnetic circuit area of the arc-shaped outer plate 312g is S 4 . The relationship between S _{3 and} S ₄ and the above parameters is as follows:

.................(36)

.................(37)

_R4 is the magnetic resistance of the arc inner plate 312f, _R5 is the magnetic resistance of the arc outer plate 312g, and _R6 is the magnetic resistance of the arc bottom plate 312e. The relationship between the magnetic resistance _Rtransmit of the transmitting unit 31 and the above parameters is as follows:

.................(38)

.................(39)

.................(40)

.................(41)

The air gap magnetic resistance of the wireless transmission mechanism 3 is R _δ Henry ^-1 , the width of the air gap interval is δ mm, the air gap equivalent magnetic circuit area between the second annular inner plate 322b and the arc-shaped inner plate 312f is S _δ1 , the air gap equivalent magnetic circuit area between the second annular outer plate 322c and the arc-shaped outer plate 312g is S _δ2 , the vacuum magnetic permeability is u ₀ Henry/m, R _δ1 is the air gap magnetic resistance between the second annular inner plate 322b and the arc-shaped inner plate 312f, R _δ2 is the air gap magnetic resistance between the second annular outer plate 322c and the arc-shaped outer plate 312g, F ₁ , F ₂ , F ₃ and F ₄ are all edge magnetic flux coefficients, which are used to correct the influence of the edge air gap magnetic resistance on the air gap magnetic resistance;

When b ₁ =b ₃ , we have:

.................(42)

.................(43)

.................(44)

When b ₂ =b ₄ , we have:

.................(45)

.................(46)

.................(47)

When b ₁ >b ₃ , then w ₁ =b ₁ , w ₂ =b ₃ , D = D ₃ ; when b ₃ >b ₁ , then w ₁ =b ₃ , w ₂ =b ₁ , D = D ₁ , then:

............(48)

....(49)

When b ₂ >b ₄ , then w ₁ =b ₂ , w ₂ =b ₄ , D=D ₄ ; when b ₄ >b ₂ , then w ₁ =b ₄ , w ₂ =b ₂ , D=D ₂ , then:

.............(50)

....(51)

.................(52)

Among them, K ₂ is the reluctance correction coefficient, 0.2≤K ₂ ≤3, and the value range of K ₂ is based on: F ₁ , F ₂ , F ₃ and F ₄ are general expressions for the correction of air gap reluctance under the consideration of edge air gap reluctance, but under different air gap intervals, the magnetic circuit shape of the magnetic field is different, and the magnetic field division is complex. It is difficult for F ₁ , F ₂ , F ₃ and F ₄ to accurately correct the air gap reluctance. In order to make the air gap reluctance calculation more accurate under different air gap intervals, it is necessary to introduce the parameter K ₂ to correct the air gap reluctance;

Preferably, 0.1≤δ≤3. Specifically, in different embodiments, the air gap width δ is the distance between the transmitting unit 31 and the receiving unit 32, which can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm; preferably, the air gap width δ is 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm.

Wherein, the inductance of the transmitting unit 31 is L _dtransmit Henry, the air gap magnetic resistance of the wireless transmission mechanism 3 is R _δ Henry ^-1 , the magnetic resistance of the transmitting unit 31 is _Rtransmit Henry ^-1 , the magnetic resistance of the receiving unit 32 is _Rreceive Henry ^-1 , and the number of turns of the transmitting coil 311 is _Ntransmit , then:

.................(53)

Further, based on the above structure of the ultrasonic machining device 10 disclosed in the present embodiment, the frequency of the electrical signal input to the receiving unit 32 is defined as f Hz, the number of turns of the transmitting coil 311 is N _transmit , the peak current passed into the transmitting unit 31 is I _transmit ampere, the magnetic resistance of the transmitting unit 31 is R _transmit Henry ^-1 , the magnetic resistance of the receiving unit 32 is R _receive Henry ^-1 , the air gap magnetic resistance of the wireless transmission mechanism 3 is R _δ Henry ^-1 , and the apparent power of the transmitting unit 31 is Q _transmit volt-ampere, then the above parameters satisfy the relationship:

.................(54)

Substituting the above equation (53) into equation (54), the relationship between the apparent power _Qtransmit of the transmitting unit 31 and the above parameters in this embodiment can be obtained:

.................(55)

The inductance of the receiving unit 32 is L _dreceive Henry, the number of turns of the receiving coil 321 is _Nreceive , and the air gap magnetic resistance of the wireless transmission mechanism 3 is R _δ Henry ^-1 , then:

.................(56)

Furthermore, the peak current of the receiving unit 32 is _Ireceived ampere, the magnetic resistance of the transmitting unit 31 _{is Rtransmitted} Henry ^-1 , the air gap magnetic resistance of the wireless transmission mechanism 3 is _Rδ Henry ^-1 , the magnetic resistance of the receiving unit 32 is _Rreceived Henry ^-1 , the number of turns of the receiving coil 321 is _Nreceived , and the apparent power of the receiving unit 32 is _Qreceived volt-ampere, then the above parameters satisfy the relationship:

.................(57)

Substituting the above equation (56) into equation (57), the relationship between the apparent power _Qreceived of the receiving unit 32 and the above parameters in this embodiment can be obtained:

.................(58)

It should be noted that, since some parameters in the relational expressions (30)-(58) need to be measured by the ultrasonic machining device 10, in order to avoid errors in the measured data, K ₁ is set, K ₁ is a correction coefficient, 0.5≤K ₁ ≤1.5, which is used to correct the error between the calculated apparent power and the optimal apparent power caused by the human error in the data measurement process, such as the measurement error of the frequency of the electrical signal input to the receiving unit 32, the measurement error of the peak current, etc. The frequency measurement error of the electrical signal is generally 15%, and the measurement error of the peak current is 20%; therefore, it can be understood that when there is no error in the measured parameters, preferably, K ₁ =1; wherein, 2≤N _transmit ≤240, 2≤N _receive ≤240;

In this way, the apparent power of the transmitting unit 31 and the receiving unit 32 obtained based on the relations (55) and (58), when based on the structural parameters of the transmitting unit 31 and the receiving unit 32 of the ultrasonic machining device 10 provided in this embodiment, after the current is passed, the peak current passed is consistent with the apparent power obtained based on the above relationship. When working under the condition, its apparent power and the peak current passed can be coordinated with the structural parameters and performance of the transmitting unit 31 and the receiving unit 32 of the wireless transmission mechanism 3, thereby reducing the temperature rise of the wireless transmission mechanism 3 in the working state and improving the efficiency of wireless transmission and the stability of continuous operation of the equipment; further, based on the reasonable requirements of processing, the increase in amplitude can be basically consistent with the increase in apparent power, and can help avoid the conversion of energy into heat consumption and improve the energy conversion rate.

Specifically, in order to verify that the receiving unit 32 and the transmitting unit 31 of the ultrasonic machining device 10 provided in the embodiment of the present invention have a lower temperature rise than the prior art after matching the peak current and the apparent power based on the above relationship, and have an increase in amplitude substantially the same as the increase in apparent power, two groups of tests were conducted, refer to the following table:

In Table 3A and Table 3B, the transmitting unit 31 and the receiving unit 32 of the third ultrasonic machining device are reasonably designed based on the above relationship. The third ultrasonic machining device is tested after current is passed through it. At the same time, based on the structural parameters of the third ultrasonic machining device, the transmitting unit 31 is based on the relationship (30)-(55) to obtain the apparent power Q5 _emission of the transmitting unit 31:

And combined with the correction factor K _1, the setting range of Q5 _emission is obtained;

The receiving unit 32 obtains the relationship between the apparent power Q5 _received by the receiving unit 32 and the above parameters based on equations (30)-(52) and (56)-(58):

And combined with the correction coefficient _K1, the setting range of Q5 _reception is obtained;

After the current is passed through the third ultrasonic machining device, the temperature rise measurement result of the third ultrasonic machining device working within the preset time t is obtained after the transmitting unit 31 _transmits at the apparent power Q6 and the receiving unit 32 _receives at the apparent power Q6. At this time, since the transmitting unit 31 and the receiving unit 32 of the third ultrasonic machining device are reasonably designed based on the relationship between the parameters of the above relationship, Q6 _transmission is within the setting range of Q5 _transmission , and Q6 _reception is within the setting range of Q5 _reception . Specifically, 0.5≤K ₁ ≤1.5;

In addition, referring to Table 4A and Table 4B, a fourth ultrasonic machining device of the prior art is set as a comparative example, and the structural parameters of the transmitting unit 31 and the receiving unit 32 of the fourth ultrasonic machining device are obtained. The structural parameters of the transmitting unit 31 of the fourth ultrasonic machining device are substituted into the relationship (30)-(55) to _obtain the apparent power Q7 of the transmitting unit 31 of the fourth ultrasonic machining device if the transmitting unit 31 is reasonably designed:

And combined with the correction factor K _1, the setting range of Q7 _emission is obtained;

Substituting the structural parameters of the receiving unit 32 of the fourth ultrasonic machining device into equations (30)-(52) and (56)-(58) yields the following: If the receiving unit 32 of the fourth ultrasonic machining device is reasonably designed, the apparent power Q7 _received by the receiving unit 32 is:

And combined with the correction coefficient K _1, the setting range of Q7 _reception is obtained, specifically, 0.5≤K ₁ ≤1.5;

After the current is passed through the fourth ultrasonic machining device, the actual apparent power Q8 _transmission of the transmitting unit 31 and the actual apparent power Q8 _reception of the receiving unit 32 are measured, and after working for a preset time t, the temperature rise measurement result of the fourth ultrasonic machining device in the working state within the preset time t is obtained. At this time, Q8 _transmission is not within the setting range of Q7 _transmission , and Q8 _reception is not within the setting range of Q7 _reception . Therefore, the structural parameters and performance of the transmitting unit 31 and the receiving unit 32 of the fourth ultrasonic machining device do not match, and the design of the transmitting unit 31 and the receiving unit 32 of the fourth ultrasonic machining device is unreasonable.

The test method is:

When the ambient temperature is 24°C, the air gap width δ between the transmitting unit 31 and the receiving unit 32 of the third ultrasonic machining device is set to 0.3 mm, and the air gap width δ between the transmitting unit 31 and the receiving unit 32 of the fourth ultrasonic machining device is set to 0.2 mm. The transmitting units 31 of the third ultrasonic machining device and the fourth ultrasonic machining device are respectively connected to the ultrasonic generator, and the receiving unit 32 is connected to the ultrasonic transducer 2. The receiving unit 32 and the transmitting unit 31 are connected to the Yokogawa power oscilloscope to respectively collect the peak currents _Itransmit , _Ireceive and the apparent powers _Qtransmit , _Qreceive . The frequency f of the electrical signal input to the receiving unit 32 is detected by the Tektronix oscilloscope.

It should be noted that Tables 3A and 3B are the temperature rise data of the receiving unit 32 and the transmitting unit 31, and the amplitude data of the processing tool 20 connected thereto, for a third ultrasonic processing device designed in accordance with the above-mentioned relational expressions (55) and (58) of the present invention. At a preset ambient temperature, when currents of different magnitudes are respectively passed through and the working time is continuously set to 10 minutes respectively, Tables 4A and 4B are the temperature rise data of the receiving unit 32 and the transmitting unit 31, and the amplitude data of the processing tool 20 connected thereto, for a fourth ultrasonic processing device designed not in accordance with the above-mentioned relational expressions (55) and (58) of the present invention. At a preset ambient temperature, when currents of different magnitudes are respectively passed through and the working time is continuously set to 10 minutes respectively, Tables 4A and 4B are the temperature rise data of the receiving unit 32 and the transmitting unit 31, and the amplitude data of the processing tool 20 connected thereto, for a fourth ultrasonic processing device designed not in accordance with the above-mentioned relational expressions (55) and (58) of the present invention.

It can be seen from Table 3A and Table 3B that the ultrasonic machining device 10 is reasonably designed based on the relationship of the present invention, so that the structural parameters and performance of the transmitting unit 31 and the receiving unit 32 can cooperate with the peak current and apparent power passed through, and during the operation, the temperature rise of the wireless transmission mechanism 3 in the working state can be reduced, and the efficiency of wireless transmission and the stability of continuous operation of the equipment can be improved; further, when the structural parameters and performance of the transmitting unit 31 and the receiving unit 32 can cooperate with the peak current and apparent power passed through, more energy of the ultrasonic machining device 10 can be effectively used for work. When working with different apparent powers, after the machining tool 20 is installed, the amplitude increase corresponding to the machining end of the machining tool 20 can be basically the same as the increase in the apparent power of the first ultrasonic machining device, thereby maintaining a higher energy conversion rate.

It can be seen from Table 4A and Table 4B that the temperature rise of the fourth ultrasonic machining device in Table 4A and Table 4B is significantly higher than that of the third ultrasonic machining device in Table 3A and Table 3B, and when the fourth ultrasonic machining device is installed with the machining tool 20, the increase in amplitude generated by the machining end of the machining tool 20 is significantly different from the increase in the apparent power of the fourth ultrasonic machining device, resulting in a small change in amplitude while the apparent power increases, and a low energy conversion rate. That is, the structural parameters and performances of the transmitting unit 31 and the receiving unit 32 of the fourth ultrasonic machining device do not match. Therefore, the design of the transmitting unit 31 and the receiving unit 32 of the fourth ultrasonic machining device is unreasonable. During the operation of this type of fourth ultrasonic machining device, the energy of its wireless transmission mechanism 3 will have a higher proportion of heat energy consumption, resulting in the temperature rise rate of this type of fourth ultrasonic machining device being significantly higher than that of the third ultrasonic machining device in Tables 3A and 3B, and the amplitude generated by the machining end of the machining tool 20 of this type of fourth ultrasonic machining device has a large increase range and a large difference from the increase range of the apparent power, resulting in that when the apparent power of this type of fourth ultrasonic machining device increases, the amplitude change of the machining tool 20 lags and changes less, and the overall energy effective conversion rate of the wireless transmission mechanism 3 is low.

It should be noted that the apparent powers Q6 _transmission , Q6 _reception , Q8 _transmission , Q8 _reception , and the peak currents I _transmission and I _reception of the third ultrasonic machining device and the fourth ultrasonic machining device are all measured by a Yokogawa power oscilloscope (model: PX8000). Specifically, this embodiment 2 provides a measurement method as follows:

Connect the CH1 voltage probe of Yokogawa power oscilloscope to the positive and negative poles of the transmitting unit 31 respectively, and connect the CH1 current probe to the transmitting unit 31, with the direction of the CH1 current probe flowing from the positive pole to the negative pole;

Connect the CH2 voltage probe of the Yokogawa power oscilloscope to the positive and negative poles of the receiving unit 32 respectively, and connect the CH2 current probe to the receiving unit 32, with the direction of the CH2 current probe flowing from the positive pole to the negative pole;

Press the ELEM1 button to open the CH1 measurement channel; press the U1 button and select voltage measurement, press the I1 button and select current measurement; press the P1 button to select power measurement;

Press the ELEM2 button to open the CH2 measurement channel; press the U2 button and select voltage measurement; press the I2 button and select current measurement; press the P2 button and select power measurement;

After pressing the "MODE" button, select the "Numeric+Wave" mode in the "DISPLAY MODE" menu; press the "SETTING" button, and in the "NUMERIC SETTING" menu, set the "Format" to "16Items";

Press the "START/STOP" button to start the test, and obtain the apparent power and peak current of the transmitting unit 31 and the receiving unit 32 through the data displayed on the screen, where I+pk1 represents the CH1 current peak, that is, the peak current passed through the transmitting unit 31; S1 represents the CH1 apparent power, that is, the apparent power of the transmitting unit 31; I+pk2 represents the CH2 current peak-to-peak value, that is, the peak current passed through the receiving unit 32; S2 represents the CH2 apparent power, that is, the apparent power of the receiving unit 32.

In addition, in the first ultrasonic machining device and the second ultrasonic machining device, the frequency f of the electrical signal input to the receiving unit 32 is measured by a Tektronix oscilloscope (model: MDO3024). Specifically, this embodiment 2 provides a measurement method as follows:

Insert the differential probe into the CH1 interface and connect it to the positive and negative electrodes of the receiving unit 32 respectively;

Open the "Menu" option, select "Edge" in the "Type" item, select "1" in the "Source" item, select "AC" in the "Coupling" item, select "Rising Edge" in the "Slope" item, set it to "0V" in the "Level" item, and select "Auto" in the "Mode" option;

Press the "1" button to turn on the CH1 measurement channel, and select AC coupling mode in the options that pop up at the bottom of the screen; press the "Measure" button in the Wave Inspector button area, select "Add measurement" in the options that pop up at the bottom of the screen, and select "1" in the "Source" item. After selecting "Frequency" in the "Measurement Type" item, select "OK to add measurement";

Press “Run/Stop” to start the test, wait for the ultrasonic power supply frequency sweep to be completed, then read and record the measured frequency on the screen. This frequency is the frequency f of the electrical signal input to the receiving unit 32 .

It should be noted that, in the present embodiment, the transmitting ferrite 312 and the receiving ferrite 322 of the third ultrasonic machining device and the fourth ultrasonic machining device are both made of manganese-zinc ferrite material, and the relative magnetic permeability u is 2500; the apparent power Q6 _transmission , Q6 _reception , Q8 _transmission , Q8 _reception , and the peak input current I _transmission , I _reception in the third ultrasonic machining device and the fourth ultrasonic machining device are all measured by a Yokogawa power oscilloscope (model: PX8000); in the third ultrasonic machining device and the fourth ultrasonic machining device, the frequency f of the electrical signal input to the receiving unit 32 is measured by a Tektronix oscilloscope (model: MDO3024);

In addition, the third ultrasonic processing device and the fourth ultrasonic processing device in this embodiment are both equipped with a D6 flat-bottomed milling cutter with a tool length of 20 mm. In different tests, different processing tools and corresponding tool lengths can also be used, such as: D4 tungsten steel rod, with a tool length of 20 mm; D16 flat-bottomed milling cutter, with a tool length of 50 mm.

Specifically, in this embodiment, a bracket 112 is provided, and the launching frame 33 is installed on the first rotation output unit 110 through the bracket 112 .

Embodiment 3:

1-16 , based on the ultrasonic machining device 10 of the above-mentioned embodiment 1 or embodiment 2, this embodiment provides an ultrasonic spindle 100, specifically, including a first rotation output unit 110, a machining tool 20 and the ultrasonic machining device 10 of embodiment 1 or embodiment 2.

Specifically, referring to Figures 1 to 8, this embodiment is based on the ultrasonic machining device 10 of Example 1, and the ultrasonic machining device 10 also includes a transmitting frame 33 and a receiving frame 34. The transmitting frame 33 and the receiving frame 34 are arranged relatively to each other along the axial direction of the blade body 1. A first accommodating groove 331 is provided on one end surface of the transmitting frame 33 facing the receiving frame 34, and a second accommodating groove 341 is provided on one end surface of the receiving frame 34 facing the transmitting frame 33. The receiving unit 32 is accommodated in the second accommodating groove 341, and the transmitting unit 31 is accommodated in the first accommodating groove 331.

Refer to Figures 1-3, in which the end cover 111 of the first rotation output unit 110 in this embodiment is equivalent to the launching frame 33, and the launching unit 31 is arranged in a first receiving groove 331 opened on the front end surface of the end cover 111; in other embodiments, a bracket can be used to hang the launching unit 31 on other equipment, and the launching frame 33 is connected to the bracket and is integrally formed with the bracket or detachably connected, and the specific assembly structure is not repeated here.

Specifically, referring to Figures 1 and 2, the rear end of the blade body 1 in this embodiment is used to connect to the first rotation output unit 110, and the front end is provided with an installation cavity 11 for accommodating the ultrasonic transducer 2. The ultrasonic transducer 2 is arranged in the installation cavity 11 and is electrically connected to the receiving unit 32.

Further, referring to FIG3 , in order to improve the reliability of the installation of the blade body 1 and the receiving frame 34, the outer peripheral surface of the blade body 1 of this embodiment is provided with a limiting convex ring 12 protruding along its radial direction, so that when the receiving frame 34 is installed and sleeved on the outer periphery of the blade body 1, the receiving frame 34 is abutted against the rear end surface of the limiting convex ring 12, thereby limiting the relative position of the receiving frame 34 and the blade body 1 during assembly, so that the blade body 1 with the receiving frame 34 installed has a weight arrangement in its axial direction that meets the design specifications, thereby improving the working stability of the ultrasonic machining device 10 during the machining process. Preferably, the receiving frame 34 in this embodiment is welded and fixed to the blade body 1.

The ultrasonic transducer 2 in this embodiment includes a piezoelectric vibrator 21, a screw 22, and a back cover 23, wherein the ultrasonic machining device 10 in this embodiment also includes a variable amplitude rod 24, so that the screw 22 is arranged in the installation cavity 11 and extends along the axial direction of the blade body 1, the rear end of the variable amplitude rod 24 extends into the installation cavity 11 and is fixedly connected to the screw 22, the piezoelectric vibrator 21 is sleeved on the outer peripheral side of the screw 22, and the rear end face of the variable amplitude rod 24 protrudes from the outer peripheral surface of the screw 22 along the radial direction of the screw 22 and forms a top-butting plane, so that when the back cover 23 is inserted into the screw 22 from the rear end of the screw 22 and is threadedly connected to the screw 22, it can cooperate with the top-butting plane to limit the position of the piezoelectric vibrator 21 relative to the screw 22.

Preferably, the horn 24 and the screw 22 in this embodiment are integrally formed, thereby improving the overall strength of the horn 24 and the screw 22 , and being able to output vibrations of a preset frequency stably and for a longer period of time under the action of the piezoelectric vibrator 21 .

3 and 7 , in order to achieve the fixation of the machining tool 20 and the horn 24, the ultrasonic machining device 10 in this embodiment further includes a collet 5 and a nut 6, wherein the front end of the horn 24 is provided with a socket 241 extending toward the rear end, the collet 5 can be sleeved on the outer periphery of the machining tool 20, and inserted into the socket 241 together with the machining tool 20. Specifically, the inner axial surface of the socket 241 in this embodiment is a cone with a diameter gradually decreasing from front to back, and the collet 5 has a tapered barrel section 51 that cooperates with the tapered socket 241. When the collet 5 and the processing tool 20 are inserted into the socket 241, the inner circumferential surface of the socket 241 can abut against the collet 5, causing the collet 5 to deform and clamp the processing tool 20. Furthermore, in order to allow the processing tool 20 to be inserted into the preset position of the socket 241 and to be relatively fixed to the amplitude changing rod 24, the nut 6 is inserted into the outer circumference of the collet 5 and the nut 6 is threadedly connected to the amplitude changing rod 24. At this time, the nut 6 can abut against the front end of the collet 5 to prevent the collet 5 from moving forward, so that the processing tool 20 can be stably assembled on the amplitude changing rod 24.

Further, referring to Figure 8, the collet 5 in this embodiment includes a conical cylinder section 51 adapted to the socket, and the collet 5 has a plurality of first deformation grooves 52 spaced apart along its circumference. Specifically, the plurality of first deformation grooves 52 are evenly distributed along the circumference of the collet 5, so that its deformation is evenly distributed along the circumference, and the first deformation grooves 52 extend to or extend through the conical cylinder section 51. In this way, in the process of the collet 5 being pushed into the socket 241, a certain amount of deformation can be generated through the first deformation grooves 52, thereby generating deformation and clamping the processing tool. At the same time, when the characteristics of the material itself are expressed, the collet 5 can be deformed and reset after being disassembled from the amplitude change rod 24 for repeated use.

Among them, the first deformation groove 52 connects the outer side surface and the inner side surface of the collet 5, and the first deformation groove 52 extends from the front end surface of the collet 5 along the axial direction of the collet 5 to the rear end surface of the collet 5, and passes through the conical cylinder section 51 and extends to the rear end surface of the collet 5. The rear groove surface of the first deformation groove 52 and the rear end surface of the collet 5 have a first gap 54, and the specific width of the first gap 54 is greater than zero, so that the collet 5 has sufficient deformation ability and can have a certain strength for clamping the processing tool 20.

Furthermore, the collet 5 has a plurality of second deformation grooves 53 spaced apart along its circumference, the second deformation grooves 53 extend to or extend through the conical cylinder section 51, the second deformation grooves 53 are spaced apart from the first deformation grooves 52 and are arranged alternately, specifically, there is a second deformation groove 53 between any two adjacent first deformation grooves 52, so that the collet 5 is subjected to uniform force during deformation.

In this embodiment, a second gap 55 is formed between the front groove surface of the second deformation groove 53 and the front end surface of the collet 5 . The second deformation groove 53 extends and passes through the rear end surface of the collet 5 . The width of the second gap 55 is greater than zero.

Specifically, in different embodiments, the machining tool 20 may be a cutter disc, a milling cutter, a grinding cutter or other tools.

Based on the above-mentioned ultrasonic spindle 100 , an embodiment of the present invention further provides an ultrasonic machine tool, including a machine tool body (not shown in the figure) and the above-mentioned ultrasonic spindle 100 , wherein the ultrasonic spindle 100 is mounted on the machine tool body.

Embodiment 4:

17-18, the ultrasonic machining device 10 based on the above-mentioned embodiment 1 or embodiment 2 includes a blade 1, an ultrasonic transducer 2 and a wireless transmission mechanism 3. The rear end of the blade 1 is mounted on the rotary output device and rotates synchronously with the rotary output device.

Specifically, this embodiment is based on the ultrasonic machining device 10 of the above-mentioned embodiment 1, and the wireless transmission mechanism 3 is wound around the outer peripheral side of the blade body 1. Specifically, as shown in Figures 17 and 18, the wireless transmission mechanism 3 in this embodiment includes a transmitting unit 31 and a receiving unit 32. The transmitting unit 31 is arranged on the outer peripheral side of the blade body 1, and the receiving unit 32 is arranged on the outer peripheral side of the blade body 1. The transmitting unit 31 and the receiving unit 32 are arranged opposite to each other along the axial direction of the blade body 1 and form an air gap 4. The transmitting unit 31 includes a transmitting coil 311 and a transmitting ferrite 312, and the receiving unit 32 includes a receiving coil 321 and a receiving ferrite 322.

Specifically, the launch unit 31 is in a full circle ring shape or a non-full circle ring shape arranged around the outer circumference of the blade body 1. It can be understood that the angle of the launch unit 31 around the outer circumference of the blade body 1 is θ. , preferably, Specifically, θ is the central angle of the emitting ferrite 312 corresponding to the circumferential extension of the blade body 1.

17 and 18, specifically, the present embodiment provides an ultrasonic drill 200, comprising a housing 210, a second rotation output unit 220, a machining tool 20, a bearing 230 and the above-mentioned ultrasonic machining device 10, wherein the second rotation output unit 220 is connected to the rear end of the tool body 1 as a rotation output device to output torque, wherein a rearwardly extending accommodating cavity 211 is provided on the front end surface of the housing 210, the rear end of the tool body 1 is accommodated in the accommodating cavity 211 and connected to the output end of the second rotation output unit 220, and the tool body 1 is connected to the housing 210 through the bearing 230, the transmitting unit 31 is disposed in the accommodating cavity 211 and connected to the housing 210, and the receiving unit 32 is disposed in the accommodating cavity 211 and fixed to the tool body 1 and arranged opposite to the transmitting unit 31; specifically, the machining tool 20 is connected to the ultrasonic transducer 2 through the amplitude rod 24;

Specifically, in this embodiment, the second rotation output unit 220 further includes an extended gripping handle 221 , and the housing 210 is fixedly connected to the second rotation output unit 220 , so that the relative positions of the ultrasonic machining device 10 and the second rotation output unit 220 are stable.

This specification discloses the invention with reference to the accompanying drawings, and also enables those skilled in the art to implement the invention, including making and using any device or system, using suitable materials, and using any combined methods. The scope of the invention is defined by the claimed technical solution, and includes other examples that occur to those skilled in the art. As long as such other examples include structural elements that are not different from the literal language of the claimed technical solution, or such other examples contain equivalent structural elements that are not substantially different from the literal language of the claimed technical solution, such other examples should be considered to be within the scope of protection determined by the claimed technical solution of the present invention.

Claims (16)

1. An upper and lower ring ultrasonic processing device, characterized in that it includes: A cutter body, the rear end of which is used to connect with the rotary output device, and the front end is provided with an installation cavity; Wireless transmission mechanism, the wireless transmission mechanism includes a transmitting unit and a receiving unit, the transmitting unit is located on the outer peripheral side of the blade body, the receiving unit is located on the outer peripheral side of the blade body, the transmitting unit is connected to the The receiving unit is arranged oppositely along the axial direction of the cutter body and is formed with an air gap. The transmitting unit includes a transmitting coil and a transmitting magnet that generates a magnetic field based on the current of the transmitting coil. The receiving unit includes a receiving coil and a transmitter for receiving. a receiving magnet for the magnetic field generated by the transmitting unit; and Ultrasonic transducer, the ultrasonic transducer is located in the installation cavity and is electrically connected to the receiving unit; The frequency of the electrical signal input to the receiving unit is f Hertz, the air gap magnetic resistance of the wireless transmission mechanism is R _δ Henry ^-1 , the magnetic resistance of the transmitting unit is R _transmitting Henry ^-1 , and the receiving unit The magnetic resistance is R _receiving Henry ^-1 ; Wherein, the apparent power of the transmitting unit is Q _transmitting volt-ampere, the peak current passed through the transmitting unit is I _transmitting ampere, and the number of turns of the transmitting coil is N _transmitting , then the above parameters satisfy the relational expression: The number of turns of the receiving coil is N _receiving , the apparent power of the receiving unit is Q _receiving volt-ampere, and the peak current passed through the receiving unit is I _{receiving volt} -ampere, then the above parameters satisfy the relationship: _K1 is the correction coefficient, _{0.5≤K1≤1.5} , _{2≤Nreceiving≤240} , _{2≤Ntransmitting≤240} . 2. The upper and lower ring ultrasonic processing device according to claim 1, wherein the angle at which the transmitting unit is wound along the outer circumferential side of the cutter body is θ, . 3. The upper and lower ring ultrasonic processing device according to claim 2, wherein θ=2π, the emitting magnet includes a first annular bottom plate, a first annular inner plate and a first annular outer plate, and the first annular outer plate The inner side plate is connected to the inner side of the first annular base plate, the first annular outer side plate is connected to the outer side of the first annular base plate, and the first annular base plate, the first annular inner side plate and the first annular outer side plate A first buried wire groove is formed with an opening facing the receiving unit, the transmitting coil is arranged around the first annular inner plate along the circumferential direction of the blade body, and the transmitting coil is accommodated in the first buried wire groove. ; Wherein, the thickness of the first annular bottom plate is H ₃ mm, the thickness of the first annular inner plate is b ₃ mm, the thickness of the first annular outer plate is b ₄ mm, and the emission magnet is along the blade The axial extension length of the body is H ₄ mm, the inner diameter of the first annular inner plate is D ₃ mm, and the outer diameter of the first annular outer plate is D ₄ mm; The receiving magnet comprises a second annular bottom plate, a second annular inner plate and a second annular outer plate, the second annular inner plate is connected to the inner side edge of the second annular bottom plate, the second annular outer plate is connected to the outer side edge of the second annular bottom plate, a second wire embedding groove with an opening toward the transmitting unit is formed between the second annular bottom plate, the second annular inner plate and the second annular outer plate, the receiving coil is arranged around the second annular inner plate along the circumference of the blade body, and the receiving coil is accommodated in the second wire embedding groove; wherein the thickness of the second annular bottom plate is H ₁ mm, the thickness of the second annular inner plate is b ₁ mm, the thickness of the second annular outer plate is b ₂ mm, the length of the receiving magnet extending along the axial direction of the blade body is H ₂ mm, the inner diameter of the second annular inner plate is D ₁ mm, and the outer diameter of the second annular outer plate is D ₂ mm; The relative magnetic permeability of the transmitting magnet and the receiving magnet is u, the vacuum magnetic permeability is u ₀ Henry/meter, the magnetic circuit area of the second annular inner plate is S ₁ , and the second annular outer plate has The magnetic circuit area of the board is S ₂ , and the relationship between S ₁ , S ₂ and the above parameters is as follows: _R1 is the magnetic resistance of the second annular inner plate, _R2 is the magnetic resistance of the second annular outer plate, _R3 is the magnetic resistance of the second annular bottom plate, and the relationship between the magnetic resistance _Rreceive of the receiving unit and the above parameters is as follows: The magnetic circuit area of the first annular inner plate is S ₃ , and the magnetic circuit area of the first annular outer plate is S ₄ . The relationship between S ₃ , S ₄ and the above parameters is as follows: R ₄ is the magnetic resistance of the first annular inner plate, R ₅ is the magnetic resistance of the first annular outer plate, R ₆ is the magnetic resistance of the first annular bottom plate, and the magnetic resistance R of the transmitting unit _emits The relationship with the above parameters is as follows: . 4. The upper and lower ring ultrasonic machining device according to claim 3, characterized in that the air gap equivalent magnetic circuit area between the second annular inner plate and the first annular inner plate is S _δ1 , the air gap equivalent magnetic circuit area between the second annular outer plate and the first annular outer plate is S _δ2 , R _δ1 is the air gap magnetic resistance between the second annular inner plate and the first annular inner plate, R _δ2 is the air gap magnetic resistance between the second annular outer plate and the first annular outer plate, F ₁ , F ₂ , F ₃ and F ₄ are all edge flux coefficients, and the width of the air gap is δ mm; When b ₁ =b ₃ , then there is: When b ₂ =b ₄ , we have: When b ₁ >b ₃ , then w ₁ =b ₁ , w ₂ =b ₃ , D = D ₃ ; when b ₃ >b ₁ , then w ₁ =b ₃ , w ₂ =b ₁ , D = D ₁ , then: When b ₂ >b ₄ , then w ₁ =b ₂ , w ₂ =b ₄ , D=D ₄ ; when b ₄ >b ₂ , then w ₁ =b ₄ , w ₂ =b ₂ , D=D ₂ , Then there are: Among them, K ₂ is the magnetic resistance correction coefficient, 0.2≤K ₂ ≤3. 5. The upper and lower ring ultrasonic processing device according to claim 2, characterized in that, , the emitting magnet includes an arc-shaped bottom plate, an arc-shaped inner plate and an arc-shaped outer plate. The arc-shaped inner plate is connected to the inner side of the arc-shaped bottom plate, and the arc-shaped outer plate is connected to the arc-shaped outer plate. On the outer side of the base plate, the arc-shaped base plate, the arc-shaped outer plate and the arc-shaped inner plate are concentrically arranged, and an opening is formed between the arc-shaped base plate, the arc-shaped inner plate and the arc-shaped outer plate towards the receiving unit. The first buried wire trough; wherein, the thickness of the arc-shaped bottom plate is H ₃ mm, the thickness of the arc-shaped inner plate is b ₃ mm, the thickness of the arc-shaped outer plate is b ₄ mm, and the thickness of the launcher The length of the magnet extending along the axial direction of the cutter body is H ₄ mm, the inner diameter of the arc-shaped inner plate is D ₃ mm, the outer diameter of the arc-shaped outer plate is D ₄ mm, and the transmitting coil is along the length of the cutter body. is arranged circumferentially around the arc-shaped bottom plate or the arc-shaped outer plate; The receiving magnet includes a second annular bottom plate, a second annular inner plate and a second annular outer plate. The second annular inner plate is connected to the inner edge of the second annular bottom plate, and the second annular outer plate is connected to the inner side of the second annular bottom plate. On the outer edge of the second annular bottom plate, a second buried wire groove with an opening facing the emission unit is formed between the second annular bottom plate, the second annular inner plate and the second annular outer plate; wherein, the second The thickness of the annular bottom plate is H ₁ mm, the thickness of the second annular inner plate is b ₁ mm, the thickness of the second annular outer plate is b ₂ mm, and the length of the receiving magnet extending along the axial direction of the cutter body is H ₂ mm, the inner diameter of the second annular inner plate is D ₁ mm, the outer diameter of the second annular outer plate is D ₂ mm, and the receiving coil surrounds the first ring along the circumferential direction of the cutter body. Two annular inner panel settings; The relative magnetic permeability of the transmitting magnet and the receiving magnet is u, the vacuum magnetic permeability is u ₀ Henry/meter, the magnetic circuit area of the second annular inner plate is S ₁ , and the second annular outer plate has The relationship between the magnetic circuit area S ₂ , S ₁ , S ₂ of the board and the above parameters is as follows: R ₁ is the magnetic resistance of the second annular inner plate, R ₂ is the magnetic resistance of the second annular outer plate, R ₃ is the magnetic resistance of the second annular bottom plate, and the magnetic resistance R of the receiving unit _receives The relationship with the above parameters is as follows: The magnetic circuit area of the arc-shaped inner plate is S ₃ , and the magnetic circuit area of the arc-shaped outer plate is S ₄ . The relationship between S ₃ , S ₄ and the above parameters is as follows: R ₄ is the magnetic resistance of the arc-shaped inner plate, R ₅ is the magnetic resistance of the arc-shaped outer plate, R ₆ is the magnetic resistance of the arc-shaped bottom plate, and the magnetic resistance R of the transmitting unit _{is consistent} with the above parameters. The relationship is as follows: . 6. The upper and lower ring ultrasonic processing device according to claim 5, wherein the equivalent magnetic circuit area of the air gap between the second annular inner plate and the arcuate inner plate is S _δ1 , and the second The equivalent magnetic circuit area of the air gap between the two annular outer plates and the arc-shaped outer plate is S _δ2 , and R _δ1 is the air gap magnetic resistance between the second annular inner plate and the arc-shaped inner plate, R _δ2 is the air gap magnetic resistance between the second annular outer plate and the arc-shaped outer plate, F ₁ , F ₂ , F ₃ and F ₄ are all edge flux coefficients, and the width of the air gap interval is δ mm; When b ₁ =b ₃ , then there is: When b ₂ =b ₄ , then there is: When b ₁ >b ₃ , then w ₁ =b ₁ , w ₂ =b ₃ , D=D ₃ ; when b ₃ >b ₁ , then w ₁ =b ₃ , w ₂ =b ₁ , D=D ₁ , Then there are: When b ₂ >b ₄ , then w ₁ =b ₂ , w ₂ =b ₄ , D=D ₄ ; when b ₄ >b ₂ , then w ₁ =b ₄ , w ₂ =b ₂ , D=D ₂ , Then there are: Among them, K ₂ is the magnetic resistance correction coefficient, 0.2≤K ₂ ≤3. 7. The upper and lower ring ultrasonic processing device according to any one of claims 1 to 6 is characterized in that it also includes a transmitting frame and a receiving frame, the transmitting frame and the receiving frame are arranged relatively to each other along the axial direction of the tool body, a first accommodating groove is provided on one end face of the transmitting frame facing the receiving frame, and a second accommodating groove is provided on one end face of the receiving frame facing the transmitting frame, the transmitting unit is accommodated in the first accommodating groove, the receiving unit is accommodated in the second accommodating groove, the outer peripheral surface of the tool body is provided with a limiting convex ring protruding along its radial direction, and the receiving frame is sleeved and fixed on the outer periphery of the tool body and abuts against the rear end face of the limiting convex ring. 8. The upper and lower ring ultrasonic processing device according to any one of claims 1 to 6, characterized in that the width of the air gap interval is δ mm, 0.1≤δ≤3. 9. The upper and lower ring ultrasonic processing device according to any one of claims 1 to 6, characterized in that it also includes a horn, the ultrasonic transducer includes a piezoelectric vibrator, a screw and a back cover, and the screw is configured In the installation cavity and extending along the axial direction of the cutter body, the rear end of the horn is fixedly connected to the screw, the piezoelectric vibrator is sleeved on the screw, and the horn of the horn is The rear end surface protrudes from the outer peripheral surface of the screw along the radial direction of the screw. The rear cover is threadedly connected to the screw and cooperates with the rear end surface of the horn to limit the piezoelectric vibrator. 10. The upper and lower ring ultrasonic processing device according to claim 9, further comprising a collet and a nut for being sleeved on the outer periphery of the processing tool, and the front end of the horn is provided with a groove extending to the rear end. The inner circumferential surface of the socket is tapered with a gradually decreasing diameter from front to back, the collet can be inserted into the socket in conjunction with the processing tool, and the nut can be connected with the amplitude changer. The rod is threaded and presses against the collet to lock the processing tool. 11. The upper and lower ring ultrasonic processing device according to claim 10, wherein the collet includes a cone section adapted to the insertion hole, and the collet has a plurality of third ribs spaced apart along its circumferential direction. A deformation groove, the first deformation groove extends to or extends through the cone section; The first deformation groove connects the outer side and the inner side of the collet, and the first deformation groove runs backward from the front end surface of the collet along the axial direction of the collet through the cone section and toward the The rear end surface of the collet extends, and there is a first distance between the rear groove surface of the first deformation groove and the rear end surface of the collet. 12. The upper and lower ring ultrasonic processing device according to claim 11, wherein the collet has a plurality of second deformation grooves spaced apart along its circumference, and the second deformation grooves extend to or through all In the cone section, the second deformation grooves and the first deformation grooves are spaced and staggered; A front groove surface of the second deformation groove has a second interval with the front end surface of the collet, and the second deformation groove extends and passes through the rear end surface of the collet. 13. The upper and lower ring ultrasonic processing device according to any one of claims 1 to 6, characterized in that the emitting magnet is made of ferrite, neodymium iron boron, high frequency ceramic materials, powder metallurgy materials, amorphous and It is made of any material from nanocrystalline alloys and cobalt-iron; the receiving magnet is made of ferrite, neodymium-iron-boron, high-frequency ceramic materials, powder metallurgy materials, amorphous and nanocrystalline alloys, cobalt-iron made of any material. 14. An ultrasonic spindle, characterized in that it comprises a first rotation output unit and the upper and lower ring ultrasonic machining device according to any one of claims 1 to 13, wherein the rear end of the cutter body is assembled on the first rotation output unit. 15. Ultrasonic machine tool, characterized in that it includes a machine tool body and an ultrasonic spindle according to claim 14, and the ultrasonic spindle is installed on the machine tool body. 16. Ultrasonic drill, characterized in that it includes a housing, a second rotation output unit, a bearing, and an upper and lower ring ultrasonic processing device according to any one of claims 1 to 6, and the front end surface of the housing is provided with a rearward extending container. The rear end of the cutter body is accommodated in the accommodation cavity and connected to the output end of the second rotation output unit, and the cutter body is connected to the housing through the bearing, and the launcher The unit is disposed in the accommodating cavity and connected to the housing, and the receiving unit is disposed in the accommodating cavity and connected to the cutter body.