CN104118065B - Rotary ultrasonic vibrational line cutting part - Google Patents

Abstract

The invention discloses a kind of rotary ultrasonic vibrational line cutting part, comprise diamond fretsaw, up and down ultrasonic vibration installation, upper lower rotating electrical machine, up and down power transfer, scroll saw pretightning force device and supersonic generator.The ultrasonic wave electric energy that supersonic generator exports changes the mechanical oscillation of supersonic frequency into by PZT (piezoelectric transducer), diamond fretsaw is driven to carry out axial ultrasonic vibration, electric rotating machine drives ultrasonic vibration installation to carry out circumference rotary motion, scroll saw pretightning force device provides the pretightning force of diamond fretsaw, this rotary ultrasonic vibrational line cutting part improves the contact area of diamond fretsaw and workpiece to be machined in the unit interval, structure is simple, cutting force is little, working (machining) efficiency is high, fundamentally solves existing ultrasound lines cutting technique Problems existing.

Description

Rotary Ultrasonic Vibration Wire Cut Parts

technical field

The invention relates to the technical field of cutting hard and brittle materials, in particular to a rotating ultrasonic vibration wire cutting component for processing hard and brittle materials.

Background technique

Hard and brittle materials such as stone, gemstone, silicon crystal, quartz crystal, and cemented carbide have been widely used in precision manufacturing, aerospace, chemical industry, electronics, biomedicine and other fields due to their excellent and stable physical and chemical properties. At present, the processing of hard and brittle materials mostly adopts circular saws, band saws, wire saws and other processing forms. The processing is difficult, the processing accuracy is low, the cost is high, the waste of raw materials is serious, and it is difficult to process workpieces with complex shapes. Although diamond wire saws can process However, the wire saw bypasses the guide wheel, the tension of the wire saw is different, the diamond particles and the matrix are easy to fall off, the processing performance is reduced, and the production cost is increased.

In order to overcome the deficiencies in the cutting technology of hard and brittle materials mentioned above, in the patent document whose patent number is ZL03133682.5 and the title of invention is "Ultrasonic Wire Cutting Saw for Processing Hard and Brittle Materials", an ultrasonic wire cutting saw is disclosed. Through the reciprocating motion structure of the crank connecting rod, the ultrasonic vibration diamond wire cutting saw is reciprocatingly cut, and good experimental results have been achieved, but the reciprocating linear speed of the crank connecting rod mechanism is not uniform enough, and the diamond wire saw is not rotating. The one-sided wear is fast, which affects the cutting effect of the ultrasonic vibration diamond wire saw, so further improvements are needed to improve the processing efficiency and precision of the ultrasonic vibration diamond wire saw.

Contents of the invention

The invention provides a new type of rotating ultrasonic vibration wire-cutting component, aiming at overcoming the deficiencies existing in the existing ultrasonic vibration wire-cutting device and improving the processing efficiency and processing accuracy of the ultrasonic-vibrating diamond wire-cutting device.

Rotary ultrasonic vibration wire cutting parts, the parts include diamond wire saw, upper ultrasonic vibration device, lower ultrasonic vibration device, upper rotating motor, lower rotating motor, upper power transmission device, lower power transmission device, wire saw pretension device and ultrasonic generator.

The upper and lower ultrasonic vibration devices include piezoelectric transducers, horns and casings. The lower ultrasonic vibration device is connected with the rotation shaft of the lower rotating motor through its casing. The lower rotating motor is installed on the lower working arm of the machine tool through screws. The ultrasonic vibration device is connected with the rotating shaft of the upper rotating motor through its shell, and the upper rotating motor is connected with the lower end of the wire saw pre-tightening force device. The upper end of the wire saw pre-tightening force device is installed on the upper working arm of the machine tool. A diamond wire saw is installed between the horns of the ultrasonic vibration device.

The wire saw pretension device includes a spring, a guide column and a guide sleeve, the lower end of the spring is connected with the upper rotating motor, and the upper end of the spring is connected with the upper working arm of the machine tool. The guide column is connected with the rotating motor, and the guide sleeve is connected with the upper working arm of the machine tool. The guide column is inserted into the guide sleeve through a clearance fit. The cooperation between the guide column and the guide sleeve ensures that the spring does not deflect while providing pre-tightening force. The diamond wire The saw remains taut and straight at all times.

An upper electric energy transmission device is installed between the upper rotating motor and the upper ultrasonic vibration device, and a lower electric energy transmission device is installed between the lower rotating motor and the lower ultrasonic vibration device. The function of the electric energy transmission device is to transmit the electric energy output by the ultrasonic generator to the The piezoelectric transducer and the power transmission device can adopt the power transmission device of the carbon brush collector ring or the non-contact power transmission device using the principle of electromagnetic induction.

The ultrasonic generator outputs two channels of ultrasonic electric energy, and there is a 180° phase difference between the ultrasonic electric energy output to the upper and lower piezoelectric transducers, and the piezoelectric transducer converts the ultrasonic electric energy into mechanical vibration of ultrasonic frequency, that is, when the piezoelectric When the front end of the horn of the transducer shrinks and vibrates upward, the front end of the horn of the lower piezoelectric transducer stretches and vibrates upward; when the front end of the horn of the upper piezoelectric transducer stretches and vibrates downward, the lower piezoelectric transducer The front end of the horn of the piezoelectric transducer shrinks and vibrates downward, and then the two piezoelectric transducers drive the diamond wire saw to perform axial ultrasonic vibration in the same direction.

Both the upper and lower rotating motors are rotational speed and phase controllable motors with rotary encoders, and the upper and lower rotating motors drive the upper and lower ultrasonic vibration devices to perform synchronous circular rotation.

When working, the rotating ultrasonic vibration wire cutting part is installed on the working arm of the machine tool with up and down reciprocating motion, and the workpiece is installed on the two-axis or multi-axis linkage workbench. Compound motion state. The workpiece moves on the worktable according to the specified track, and when the workpiece is in contact with the diamond wire saw, the rotary ultrasonic vibration wire cutting process of the workpiece can be realized. Compared with the ultrasonic wire cutting saw introduced in the existing literature, the rotating ultrasonic vibration wire cutting part increases the contact area between the diamond wire saw and the processed workpiece per unit time, and has a simple structure, small cutting force, high processing efficiency, and simple control. It fundamentally solves the problems existing in the existing ultrasonic wire cutting technology, and has broad application prospects.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic structural diagram of the upper ultrasonic vibration device of the present invention.

Fig. 3 is a schematic structural diagram of the lower ultrasonic vibration device of the present invention.

Fig. 4 is a schematic structural diagram of an application example of the present invention.

Explanation of symbols in the figure: 1. Lower working arm, 2. Lower rotating motor, 3. Lower power transmission device, 4. Lower ultrasonic vibration device, 401.A horn, 402.A piezoelectric transducer, 403.A Shell, 5. Diamond wire saw, 6. Upper ultrasonic vibration device, 601.B Horn, 602.B Piezoelectric transducer, 603.B Shell, 7. Upper power transmission device, 8. Upper rotating motor, 9 .Wire saw pretension device, 901. spring, 902. guide column, 903. guide sleeve, 10. upper working arm, 11. wire frame, 12. column, 13 bed.

Detailed ways

As shown in Figures 1-3, the rotating ultrasonic vibration wire cutting components include a diamond wire saw 5, an upper ultrasonic vibration device 6, a lower ultrasonic vibration device 4, an upper rotating motor 8, a lower rotating motor 2, an upper power transmission device 7, and a lower power transmission device. Transmission device 3, wire saw pretension device 9 and ultrasonic generator,

Both the upper and lower ultrasonic vibration devices include piezoelectric transducers, horns and housings. The diameter of the piezoelectric transducer is 30mm, and the material of the piezoelectric ceramic sheet is PZT-8. The size is: Ф30×Ф15×5 , and the piezoelectric ceramic sheet The number of pieces is 2, the natural frequency of the piezoelectric transducer is 20.1KHz, the power of the piezoelectric transducer is 200W, and the output amplitude at the end of the horn is 24 microns.

The following ultrasonic vibrating device 4 is connected with the rotating shaft of the following rotating motor 2 through its A shell 403, and the following rotating motor 2 is installed on the lower working arm 1 of the machine tool by screws, and the upper ultrasonic vibrating device 6 is connected with the upper rotating shaft through its B shell 603. The rotating shafts of the motor 8 are connected, and the upper rotating motor 8 is connected with the lower end of the wire saw preload device 9. A diamond wire saw 5 is installed between the horns.

The wire saw pretension device 9 includes a spring 901, a guide post 902 and a guide sleeve 903. The lower end of the spring 901 is connected to the upper rotating motor 8, and the upper end of the spring 901 is connected to the upper working arm 10 of the machine tool. The guide column 902 is connected with the upper rotating motor 8, and the guide sleeve 903 is connected with the upper working arm 10. The guide column 902 is inserted into the guide sleeve 903 through a clearance fit, and the gap size is 0.03 mm, so that the spring 901 does not When deflection occurs, the preload force of the spring 901 is 30N, and the diamond wire saw 5 remains vertical all the time.

A diamond wire saw 5 is installed between the horns of the upper and lower ultrasonic vibration devices. The diameter of the diamond wire saw 5 is 0.5mm, the diamond particle size is 200#, and the length of the diamond wire saw 5 is 500mm. The upper rotating motor 8 and the upper ultrasonic An upper non-contact power transmission device 7 designed using the principle of electromagnetic induction is installed between the vibrating devices 6 , and a lower non-contact power transmission device 3 designed using the principle of electromagnetic induction is installed between the lower rotating motor 2 and the lower ultrasonic vibration device 4 .

The ultrasonic generator outputs two channels of ultrasonic electric energy, and the ultrasonic electric energy output to the upper and lower piezoelectric transducers has a phase difference of 180°. The piezoelectric transducer converts the ultrasonic electric energy into mechanical vibration, that is, when the upper piezoelectric transducer When the front end of the horn 601 of the 602 shrinks and vibrates upward, the front end of the horn 401 of the lower piezoelectric transducer 402 stretches and vibrates upward, and when the front end of the horn 601 of the upper piezoelectric transducer 602 stretches and vibrates downward , the front end of the horn 401 of the lower piezoelectric transducer 402 shrinks and vibrates downward, and then the two piezoelectric transducers drive the diamond wire saw 5 to perform ultrasonic vibration in the same direction, and the up and down rotating motor drives the upper and lower ultrasonic vibration devices Synchronous rotation is carried out, and the ultrasonic vibration device and the diamond wire saw 5 are driven by the reciprocating mechanism to reciprocate up and down.

As shown in FIG. 4 , during operation, the diamond wire saw 5 is in a compound motion state of high frequency ultrasonic vibration, up and down reciprocating motion and circular rotation motion. The ultrasonic vibration frequency is 20.1KHz, the rotation speed of the ultrasonic vibration device is 800r/min, the up and down reciprocating speed is 1000mm/min, the axial preload of the diamond wire saw 9 is 30N, the lateral pressure is 8N, and the thickness is 20mm. The SiC glass with a length and width of 200x100mm is processed in a straight line, and the cutting feed rate of the diamond wire saw 5 reaches 35mm/min.

Claims (5)

1. rotary ultrasonic vibrational line cutting part, these parts comprise diamond fretsaw, upper ultrasonic vibration installation, lower ultrasonic vibration installation, upper electric rotating machine, lower rotating electrical machine, upper power transfer, lower power transfer, scroll saw pretightning force device and supersonic generator, it is characterized in that: ultrasonic vibration installation includes PZT (piezoelectric transducer) up and down, ultrasonic transformer and shell, lower ultrasonic vibration installation is connected by the rotating shaft of its shell and lower rotating electrical machine, lower rotating electrical machine is arranged on the lower working arm of lathe by screw, upper ultrasonic vibration installation is connected by the rotating shaft of its shell and upper electric rotating machine, upper electric rotating machine is connected with the lower end of scroll saw pretightning force device, the upper end of scroll saw pretightning force device is arranged on the upper working arm of lathe, between the ultrasonic transformer of upper and lower two ultrasonic vibration installations, diamond fretsaw is installed, scroll saw pretightning force device comprises spring, lead and fairlead, lower spring end is connected with upper electric rotating machine, spring upper end is connected with the upper working arm of lathe, lead is connected with upper electric rotating machine, fairlead is connected with the upper working arm of lathe, lead is inserted in fairlead by matched in clearance, between upper electric rotating machine and upper ultrasonic vibration installation, power transfer is installed, between lower rotating electrical machine and lower ultrasonic vibration installation, lower power transfer is installed.

2. rotary ultrasonic vibrational line cutting part according to claim 1, is characterized in that: described power transfer is carbon brush collecting ring power transfer.

3. rotary ultrasonic vibrational line cutting part according to claim 1, is characterized in that: described power transfer be utilize electromagnetic induction principle non-contact electric energy transmission device.

4. according to the rotary ultrasonic vibrational line cutting part in claim 1-3 described in any, it is characterized in that: described upper electric rotating machine is rotating speed with rotary encoder and phase place controllable motor.

5. according to the rotary ultrasonic vibrational line cutting part in claim 1-3 described in any, it is characterized in that: described lower rotating electrical machine is rotating speed with rotary encoder and phase place controllable motor.