CN108555429B - Large-range continuous ultrasonic welding device for metal foil - Google Patents

Abstract

The invention provides a large-range continuous ultrasonic welding device for metal foil, which comprises the following components: a piezoelectric vibrator system and a pneumatic tool table; the piezoelectric vibrator system comprises two identical multi-drive half-wave transducer structures, two driving wheels and a tool head; the two multi-drive half-wave transducer structures are symmetrically distributed along the horizontal direction relative to the tool head; the driving wheel is arranged between each multi-driving half-wave transducer structure and the tool head and is respectively connected with the multi-driving half-wave transducer structure and the tool head. The invention drives the working head to vibrate up and down through the half-wave transducer, thereby realizing the welding of the metal foil at the bottom of the working head. And the half-wave transducer drives the driving wheel to do elliptical motion, so that the starting workbench is driven to slide along the sliding rail, and then the metal foil moves along with the sliding rail, thereby realizing the purpose of continuous ultrasonic welding.

Description

Metal foil large-scale continuous ultrasonic welding device

technical field

The invention relates to the field of ultrasonic motors.

Background technique

In ultrasonic metal bonding technology, the ultrasonic vibration system is one of the key factors determining the performance of the entire ultrasonic system. With the development of ultrasonic bonding technology, more and more types of materials are required to be bonded, and faster bonding In order to meet these new processing requirements, a higher-power ultrasonic transducer is first required; at the same time, in the process of metal material bonding, the motor needs to cooperate with the bonding speed to push the foil. , but the matching effect in actual processing is not ideal. Based on these two problems, an ultrasonic piezoelectric vibrator structure integrating the functions of a high output power transducer and an ultrasonic motor is proposed. The multi-drive and push-pull design can not only greatly increase the power of the transducer, but also disperse the heat source of the system and improve the energy loss caused by the heating of the system; in addition, the ultrasonic motor function of the piezoelectric vibrator system of the present invention can realize The synchronous conveying of the metal foil improves the problem that the motor and the welding speed are difficult to match.

Contents of the invention

The purpose of the present invention is to design a metal foil large-scale continuous ultrasonic welding device integrating the functions of a high output power transducer and an ultrasonic motor.

In order to solve the above technical problems, the present invention provides a large-scale continuous ultrasonic welding device for metal foil, including: a piezoelectric vibrator system and a pneumatic tool table; the piezoelectric vibrator system includes two identical multi-drive half-wave transducers structure, two driving wheels and tool head; two described multi-drive half-wave transducer structures are symmetrically distributed along the horizontal direction with respect to the tool head; the drive wheel is arranged on each multi-drive half-wave transducer structure and Between the tool heads and connected to them respectively;

Each of the multi-drive half-wave transducer structures includes four piezoelectric transducers and a horn; one end of the horn is connected to the driving wheel, and the other end is connected to the four piezoelectric transducers respectively. The transducers are connected; the structural dimensions of the four piezoelectric transducers are the same, and each piezoelectric transducer is composed of a piezoelectric ceramic sheet connected to a metal front cover and a metal rear cover; the four piezoelectric transducers The transducers are divided into two groups, and the piezoelectric ceramics of each group of piezoelectric transducers have different excitation methods;

The pneumatic tool table includes a welding work platform and two pneumatic drive platforms, the pneumatic drive platform is symmetrically distributed along the horizontal direction relative to the welding work platform; the upper surface of the welding platform is covered with metal foil, and the tool The bottom end surface of the head is provided with a welding device and is located above the metal foil material; the pneumatic tool table is slidably connected with a slide rail, and the extension direction of the slide rail is the same as the extension direction of the metal foil material;

The drive wheels are respectively located above the pneumatic drive platform, and the pneumatic drive platform moves up and down along the vertical direction;

The piezoelectric transducer drives the driving wheel to rotate, and drives the tool head to vibrate in the axial direction; when the pneumatic driving platform rises in the vertical direction, the pneumatic driving platform contacts the driving wheel, When the driving wheel rotates, it will directly generate a friction force along the direction of the slide rail with the pneumatic drive platform, which will drive the pneumatic tool table to slide a certain distance along the slide rail, so that the metal foil will move in the same direction for a certain distance, and the welded part of the metal The foil is removed from below the welding unit.

In a preferred embodiment: the driving wheel is a cylinder with a circular cross section; the tool head is a cylinder with a regular hexagonal cross section.

In a preferred embodiment: the piezoelectric transducer drives the driving wheel to make an elliptical rotation, and drives the tool head to vibrate along the axial direction.

In a preferred embodiment: the piezoelectric ceramic sheet is arranged between the metal front cover and the metal rear cover; each piezoelectric transducer has two groups of piezoelectric ceramic sheets;

In a preferred embodiment: in the structure of the left half-wave ring energy device, four groups of piezoelectric ceramic sheets close to the metal back cover input a phase power supply to excite the longitudinal vibration of the tool head;

In the half-wave transducer structure on the right, the four sets of piezoelectric ceramic sheets near the metal back cover input the excitation power with a phase difference of 180° from the left power supply to excite the tool head to vibrate in the same direction, and the two longitudinal vibrations are superimposed .

In a preferred embodiment: In the structure of the left half-wave transducer, four groups of piezoelectric ceramic sheets close to the metal front cover are input with a phase power supply to excite the driving wheel to produce two mutually perpendicular axial bending movements , the superposition result is that the driving wheel makes an elliptical motion around the axial direction;

In the structure of the right half-wave ring energy device, the four sets of piezoelectric ceramic sheets near the metal front cover input the excitation power with a phase difference of 180° from the left power supply to excite the drive wheel to produce two mutually perpendicular axial bending movements. The result of the superposition is that the driving wheel makes an elliptical motion around the axial direction.

Compared with the prior art, the technical solution of the present invention has the following beneficial effects: the present invention drives the working head to vibrate up and down by an external force, thereby realizing the welding of the metal foil at the bottom of the working head. And the half-wave transducer drives the driving wheel to do elliptical motion, so as to drive the starting table to slide along the slide rail, and then make the metal foil move accordingly, so as to achieve the purpose of continuous ultrasonic welding.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of a metal foil large-scale continuous ultrasonic welding device

Figure 2 is a schematic diagram of the piezoelectric vibrator system of the metal foil large-scale continuous ultrasonic welding device

Fig. 3 is the left view of half-wave transducer structure;

Fig. 4 is the trajectory diagram of driving wheel;

Figure 5a and Figure 5b respectively show the piezoelectric ceramic group excitation methods of the left and right multi-drive half-wave transducer structure piezoelectric vibrators.

Detailed ways

Below in conjunction with accompanying drawing, the present invention will be further described.

Referring to Figures 1-2, a metal foil large-scale continuous ultrasonic welding device includes: a piezoelectric vibrator system 1 and a pneumatic tool table 2; the piezoelectric vibrator system 1 includes two identical multi-drive half-wave transducer structures 11. Two drive wheels 12 and a tool head 13; the two multi-drive half-wave transducer structures 11 are symmetrically distributed along the horizontal direction with respect to the tool head 13; the drive wheels 12 are arranged on each multi-drive half-wave transducer between the energy device structure 11 and the tool head 13, and are connected to it respectively;

Each of the multi-drive half-wave transducer structures 11 includes four piezoelectric transducers 111 and a horn 112; one end of the horn 112 is connected to the driving wheel 12, and the other end is respectively connected to the The above four piezoelectric transducers 111 are connected; the structural dimensions of the four piezoelectric transducers 111 are the same, and each piezoelectric transducer 111 is connected by a piezoelectric ceramic sheet 1111 to a metal front cover 1112 and a metal back cover The four piezoelectric transducers 111 are divided into two groups, and the piezoelectric ceramics of each group of piezoelectric transducers 111 have different excitation methods;

The pneumatic tool table 2 includes a welding work platform 21 and two pneumatic drive platforms 22, the pneumatic drive platform 22 is symmetrically distributed along the horizontal direction with respect to the welding work platform 21; the upper surface of the welding work platform 21 is paved with Metal foil material, the bottom end surface of the tool head 13 is provided with a welding device, and is located above the metal foil material; the pneumatic tool table 2 is slidably connected with a slide rail, and the extension direction of the slide rail is in line with the metal foil The extension direction of the material is the same;

The drive wheels 12 are respectively positioned above the pneumatic drive platform 22, and the pneumatic drive platform 22 moves up and down along the vertical direction;

The piezoelectric transducer 111 drives the driving wheel 12 to rotate, and drives the tool head 13 to vibrate up and down in the vertical direction; when the pneumatic driving platform 22 rises in the vertical direction, the pneumatic driving platform 22 abuts against the driving wheel 12. When the driving wheel 12 rotates, it will directly generate a friction force along the direction of the slide rail with the pneumatic drive platform 22, driving the pneumatic tool table 2 to slide along the slide rail for a certain distance, so that the metal foil material will be Move a certain distance to move the welded part of the metal foil from the bottom of the welding device, and then move the tool head down in the vertical direction to achieve ultrasonic welding of the new metal foil and achieve the purpose of continuous welding.

In this embodiment, in order to achieve the above technical effect, the piezoelectric transducer 111 drives the driving wheel 12 to rotate elliptically, and drives the tool head 13 to vibrate up and down in the vertical direction. The major axis or minor axis of the elliptical motion is parallel to the extending direction of the slide rail. In this embodiment, the major axis is parallel to the slide rail.

In order to realize that the piezoelectric transducer 111 drives the drive wheel 12 to do elliptical rotation, the piezoelectric ceramic sheet 1111 is arranged between the metal front cover 1112 and the metal rear cover 1113; each piezoelectric transducer 111 There are two groups of piezoelectric ceramic sheets 1111 ; the two groups of piezoelectric ceramic sheets 1111 are stacked between the metal front cover 1112 and the metal rear cover 1113 .

Among them, in the left half-wave encircling energy device structure 11, four groups of piezoelectric ceramic sheets 1111 close to the metal rear cover 1113 input one-phase power to excite the longitudinal vibration of the driving wheel 12;

In the right half-wave transducer structure 11, the four sets of piezoelectric ceramic sheets 1111 near the metal back cover 1113 input the excitation power with a phase difference of 180° from the left power supply to excite the drive wheel 12 to vibrate in the same direction. Longitudinal vibrations form a superposition. In this way, the purpose of driving the drive wheel 12 to vibrate up and down is achieved.

Among them, in the left half-wave transducer structure 11, the four groups of piezoelectric ceramic sheets 1111 close to the metal front cover 1112 input a phase power supply to excite the driving wheel 12 to generate two mutually perpendicular axial bending motions, and the superposition result The driving wheel 12 makes an elliptical motion around the axial direction;

In the right half-wave encircling energy device structure 11, the four groups of piezoelectric ceramic sheets 1111 near the metal front cover 1112 input the excitation power with a phase difference of 180° from the left power supply to excite the drive wheel 12 to generate two mutually perpendicular axes towards the bending movement.

Therefore, when welding is required, only the four groups of piezoelectric ceramic sheets 1111 near the metal rear cover 1113 in the left and right half-wave encircling energy structures 11 are excited by input power. When the metal foil needs to be moved, only the four groups of piezoelectric ceramic sheets 1111 near the metal front cover 1112 in the left and right half-wave encircling energy structures 11 are excited by the input power.

The specific excitation method is shown in Figure 5a and Figure 5b. In Fig. 5a, when the driving signal is provided in the following manner, the left driving wheel can make a clockwise elliptical motion, and the tool head can make longitudinal vibration:

For the left half-wave transducer structure 11, the four groups of piezoelectric ceramic sheets 1111 close to the metal back cover 1113 input one-phase power supply: E1=V ₃ sin(ωt); E1′=-V ₃ sin(ωt ); four groups of piezoelectric ceramic sheets 1111 close to the metal front cover 1112 input one-phase power supply: E2=V ₁ sin(ωt); E2′=V ₂ cos(ωt); E2″=V ₂ sin(ωt) ;E2"'=V ₁ sin(ωt);

In Figure 5b, when the drive signal is provided in the following manner, the clockwise elliptical motion of the drive wheel on the right can be realized, and the tool head vibrates longitudinally:

For the right half-wave transducer structure 11, the four groups of piezoelectric ceramic sheets 1111 near the metal back cover 1113 input a phase power supply with a phase difference of 180° from the left power supply, which is: E3=-V ₃ sin( ωt); E3'=V ₃ sin(ωt); the four groups of piezoelectric ceramic sheets 1111 near the metal front cover 1112 input one-phase power supply: E4=-V ₁ sin(ωt); E4'=-V ₂ cos (ωt); E4″=-V ₂ sin(ωt); E4″′=-V ₁ sin(ωt);

The driving wheel 12 is a cylinder with a circular cross section; the tool head 13 is a cylinder with a regular hexagonal cross section.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (4)

1. A large-scale continuous ultrasonic welding device for metal foil, characterized by comprising: the piezoelectric vibrator system comprises two identical multi-drive half-wave transducer structures, two driving wheels and a tool head; the two multi-drive half-wave transducer structures are symmetrically distributed along the horizontal direction relative to the tool head; the driving wheel is arranged between each multi-driving half-wave transducer structure and the tool head and is respectively connected with the tool head;

each multi-drive half-wave transducer structure comprises four piezoelectric transducers and an amplitude transformer; one end of the amplitude transformer is connected with the driving wheel, and the other end of the amplitude transformer is respectively connected with the four piezoelectric transducers; the four piezoelectric transducers have the same structural size, and each piezoelectric transducer is formed by connecting a metal front cover plate and a metal rear cover plate through piezoelectric ceramic plates; the four piezoelectric transducers are divided into two groups, and the excitation modes of piezoelectric ceramics of each group of piezoelectric transducers are different;

the pneumatic tool table comprises a welding working platform and two pneumatic driving platforms, and the pneumatic driving platforms are symmetrically distributed along the horizontal direction relative to the welding working platform; the upper surface of the welding work platform is paved with a metal foil, and the bottom end surface of the tool head is provided with a welding device and is positioned above the metal foil; the pneumatic tool table is in sliding connection fit with a sliding rail, and the extending direction of the sliding rail is the same as the extending direction of the metal foil;

the driving wheels are respectively positioned above the pneumatic driving platforms, and the pneumatic driving platforms move up and down along the vertical direction;

the piezoelectric transducer drives the driving wheel to rotate and drives the tool head to vibrate along the axial direction; when the pneumatic driving platform rises along the vertical direction, the pneumatic driving platform is abutted with the driving wheel, and when the driving wheel rotates, the friction force along the direction of the sliding rail is directly generated with the pneumatic driving platform to drive the pneumatic tool table to slide along the sliding rail for a certain distance, so that the metal foil moves along with the pneumatic tool table for a certain distance in the same direction, and the metal foil of the welded part is moved out from the lower part of the welding device;

the driving wheel is a cylinder with a circular cross section; the tool head is a cylinder with a regular hexagon cross section; the piezoelectric transducer drives the driving wheel to do elliptical rotation and drives the tool head to vibrate along the axial direction.

2. The apparatus for continuous ultrasonic welding of metal foil in large scale according to claim 1, wherein: the piezoelectric ceramic piece is arranged between the metal front cover plate and the metal rear cover plate; each piezoelectric transducer has two groups of piezoelectric ceramic plates therein.

3. The apparatus for continuous ultrasonic welding of metal foil in large scale according to claim 2, wherein: in the left half-wave ring energy device structure, four groups of piezoelectric ceramic plates close to the metal rear cover plate are input with a phase of power supply for exciting longitudinal vibration of the tool head;

in the right half-wave transducer structure, four groups of piezoelectric ceramic plates close to the metal rear cover plate are input and an excitation power supply with a phase difference of 180 ︒ with a left power supply is used for exciting the tool head to vibrate in the same direction, and two longitudinal vibrations form superposition.

4. The apparatus for continuous ultrasonic welding of metal foil in large scale according to claim 2, wherein: in the left half-wave energy converter structure, four groups of piezoelectric ceramic plates close to the metal front cover plate are input with a phase of power supply for exciting the driving wheel to generate two mutually perpendicular axial bending movements, and the superposition result is that the driving wheel performs elliptical movements around the axial direction;

in the right half-wave ring energy device structure, four groups of piezoelectric ceramic plates close to the metal front cover plate are input with an excitation power supply 180 degrees different from a left power supply to excite the driving wheel to generate two mutually perpendicular axial bending movements, and the superposition result is that the driving wheel performs elliptical movements around the axial direction.

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