Welding vibration arm with circular welding head for ultrasonic welding

Abstract

The utility model discloses a welding vibration arm with a circular welding head for ultrasonic welding, which relates to the technical field of ultrasonic welding and comprises a back plate and a support, a processing component is arranged at the top of the back plate, a vibration absorption part is arranged on the outer side of the support, the processing component comprises a transmission part, and the transmission part comprises a first section body. A second section body is arranged at the end, away from the first section body, of the back plate, a conductive sliding ring is arranged between the first section body and the second section body and located on the top of the back plate, a welding head body is installed on the side, close to the first section body, of the conductive sliding ring, and the cross section of the welding head body is round. According to the welding vibration arm provided with the circular welding head and used for ultrasonic welding, the power source body, the air source body and the transmission rod are separated through the conductive sliding ring, so that the circular welding head body can synchronously rotate at a high speed along with a welded material, and a traditional sliding friction mode is replaced with rolling friction; and the relative friction force between the welding head and a welded material is greatly eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic welding, in particular to a welding vibration arm with a circular welding head for ultrasonic welding. Background Art

[0002] Ultrasonic welding is a solid-state connection method that uses the heat and pressure generated by high-frequency vibration to combine two materials together. Under appropriate vibration energy and pressure, the material undergoes plastic deformation, and the molecules diffuse with each other to form new metal bonds or chemical bonds, thereby achieving welding.

[0003] The special structural design of the vibration arm can amplify the amplitude, so that the vibration amplitude of the contact surface reaches the ideal value, thereby improving the welding efficiency. The existing Chinese patent with the authorization announcement number CN214640976U discloses a bending vibration ultrasonic metal welding tool head. It is designed according to multiple half wavelengths, and the length can be long enough as needed. The welding end surface of the workpiece for welding is distributed at the end of the bending vibration resonant arm, and the bending vibration resonant arm can penetrate into the workpiece with a deeper structure to achieve perfect air-avoiding welding.

[0004] When in use, the terminal tool head contacts the workpiece. Under the action of applied pressure, high-frequency vibration generates friction heat to make the workpiece partially reach a plastic state, and finally weld it together. During the ultrasonic high-speed continuous welding process, the welding head in the vibrating arm is generally a flat-bottomed welding head. When the welded material flows through, relative sliding friction is generated with the flat-bottomed welding head under the welding pressure, especially when welding relatively fluffy or thick materials (high-weight materials), wrinkles, congestion and breakage of the material are likely to occur. Utility Model Content

[0005] In view of the fact that the welding heads in the above-mentioned existing vibrating arms are generally flat-bottomed welding heads, when the material to be welded flows through, relative sliding friction is generated with the flat-bottomed welding head under the welding pressure, especially when welding relatively fluffy or thicker materials (high gram weight materials), wrinkles, congestion and damage of the materials are easily generated, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a welding vibrator arm for ultrasonic welding with a circular welding head, and its purpose is to separate the power source body, the gas source body and the transmission rod through a conductive slip ring, so that the circular welding head body replaces the traditional sliding friction method with rolling friction, thereby greatly eliminating the relative friction between the welding head and the material to be welded.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a welding vibration arm for ultrasonic welding with a circular welding head, which comprises a back plate and a bracket, the back plate is fixedly mounted on the bottom of the bracket, a processing assembly is arranged on the top of the back plate, and a vibration absorbing member is arranged on the outer side of the bracket;

[0008] The processing assembly includes a transmission member, the transmission member includes a first segment body, the first segment body is fixedly mounted on the top of the bracket, a second segment body is arranged at one end of the back plate away from the first segment body, and the first segment body is arranged in parallel with the second segment body;

[0009] A conductive slip ring is arranged between the first section and the second section and on the top of the back plate. A welding head body is installed on the side of the conductive slip ring close to the first section. One end of the welding head body protrudes from the surface of the first section, and the cross-section of the welding head body is circular.

[0010] As a preferred solution of the welding vibrator arm for ultrasonic welding with a circular welding head described in the utility model, the transmission part also includes a transmission rod, one end of the transmission rod is connected to a conductive slip ring, and the other end of the transmission rod is connected to the output shaft of the air source body, and the air source body is fixedly installed on the top of the back plate.

[0011] As a preferred solution of the welding vibrator arm for ultrasonic welding with a circular welding head described in the utility model, the processing component also includes a vibrator, and the vibrator includes a power supply body, and the power supply body is fixedly installed at one end of the back plate away from the bracket, and the output shaft of the power supply body is connected to the transducer.

[0012] As a preferred solution of the welding vibrating arm for ultrasonic welding with a circular welding head described in the utility model, wherein: the other end of the transducer is connected to a variable amplitude rod, and the transducer is connected to the transmission rod through the variable amplitude rod.

[0013] As a preferred solution of the welding vibrating arm for ultrasonic welding with a circular welding head described in the utility model, the vibration absorbing part includes reinforcing ribs, the reinforcing ribs are distributed on both sides of the first section and the second section, the first section is connected to the second section through the reinforcing ribs, and zero amplitude points are respectively arranged at both ends of the reinforcing ribs.

[0014] As a preferred solution of the welding vibration arm for ultrasonic welding with a circular welding head described in the utility model, zero amplitude points are also set on both sides of the welding head body, and the reinforcing ribs are connected to the back plate and the bracket through the zero amplitude points.

[0015] As a preferred solution of the welding vibration arm for ultrasonic welding with a circular welding head described in the utility model, the vibration absorbing member also includes a rubber pad, which is fixedly installed on the bottom of the back plate, and the inner side of the rubber pad is arranged with mounting holes.

[0016] Beneficial effects of the utility model:

[0017] 1. The power source body, the gas source body and the transmission rod are separated by a conductive slip ring, so that the circular welding head body can rotate synchronously with the welded material at high speed. The rolling friction replaces the traditional sliding friction mode, which greatly eliminates the relative friction between the welding head and the welded material.

[0018] 2. Through the special mechanical structure design, the axial vibration generated by the transducer and the horn is converted into the radial vibration of the welding head body, so that the entire circumferential surface of the circular welding head produces the same amplitude, and the pressure acting vertically on the welded material is applied to achieve the desired welding effect.

[0019] 3. The bracket and the back plate are connected by using the zero amplitude points on both sides of the welding head body and the amplitude rod where there is no vibration, which ensures the stability of welding and facilitates installation and integration by the manufacturer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 The utility model is a schematic diagram of the overall structure of a welding vibration arm with a circular welding head for ultrasonic welding.

[0022] Figure 2 The utility model is a schematic cross-sectional structure diagram of a welding vibration arm with a circular welding head for ultrasonic welding.

[0023] Figure 3 The utility model is a schematic diagram of the structure of the vibration part of the welding vibration arm with a circular welding head for ultrasonic welding.

[0024] Figure 4 This is the side schematic diagram of welding with a traditional flat-bottom welding head.

[0025] Description of reference numerals:

[0026] 1. Back plate; 2. Bracket; 3. Processing assembly; 31. Transmission member; 311. First section; 312. Second section; 313. Conductive slip ring; 314. Welding head body; 315. Transmission rod; 316. Gas source body; 32. Vibration member; 321. Power source body; 322. Transducer; 323. Amplitude transformer; 4. Vibration absorbing member; 41. Reinforcement rib; 42. Zero amplitude point; 43. Rubber pad; 44. Mounting hole. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] Example 1

[0029] Reference Figure 1-4 , which is the first embodiment of the utility model, provides a welding vibrating arm for ultrasonic welding with a circular welding head, the welding vibrating arm for ultrasonic welding with a circular welding head comprises a back plate 1 and a bracket 2, the back plate 1 is fixedly mounted on the bottom of the bracket 2, a processing assembly 3 is arranged on the top of the back plate 1, a vibration absorbing member 4 is arranged on the outer side of the bracket 2, the processing assembly 3 comprises a transmission member 31, the transmission member 31 comprises a first segment 311, the first segment 311 is fixedly mounted on the top of the bracket 2, a second segment 312 is arranged at one end of the back plate 1 away from the first segment 311, the first segment 311 is arranged parallel to the second segment 312, and the first segment 311 is arranged parallel to the second segment 312. A conductive slip ring 313 is provided between one section 311 and the second section 312 and at the top of the back plate 1. A welding head body 314 is installed on the side of the conductive slip ring 313 close to the first section 311. One end of the welding head body 314 protrudes from the surface of the first section 311. The cross section of the welding head body 314 is circular. The angle between the back plate 1 and the bracket 2 is ninety degrees. The highest points of the first section 311 and the second section 312 remain flush. The conductive slip ring 313 can rotate in the groove opened in the back plate 1 and drive the welding head body 314 to rotate. The welding head body 314 is different from traditional sliding friction and is rolling friction.

[0030] The transmission member 31 also includes a transmission rod 315, one end of which is connected to a conductive slip ring 313, and the other end of the transmission rod 315 is connected to the output shaft of a gas source body 316. The gas source body 316 is fixedly installed on the top of the back plate 1. The transmission rod 315 is the main part of the entire vibrating arm, and is responsible for transmitting the vibration generated by the device along the rod body. The gas source body 316 is used to apply vertical pressure to the workpiece to avoid welding misalignment.

[0031] The processing component 3 also includes a vibrator 32, which includes a power supply body 321. The power supply body 321 is fixedly installed on the end of the back plate 1 away from the bracket 2. The output shaft of the power supply body 321 is connected to the transducer 322. The power supply body 321 is a servo motor, which can change the rotation direction of the workpiece by reversing the motor. The transducer 322 is the vibration source of the entire system, which converts electrical energy into mechanical vibration.

[0032] The other end of the transducer 322 is connected to a variable amplitude rod 323, and the transducer 322 is connected to the transmission rod 315 through the variable amplitude rod 323. The design principle of the variable amplitude rod 323 is to use the resonance principle to change the amplitude through a special geometric shape (such as a dumbbell shape) to achieve amplitude amplification or reduction.

[0033] The vibration absorbing member 4 includes reinforcing ribs 41, which are distributed on both sides of the first section 311 and the second section 312. The first section 311 is connected to the second section 312 through the reinforcing ribs 41, and zero amplitude points 42 are respectively provided at both ends of the reinforcing ribs 41. The zero amplitude points 42 refer to some positions along the axis of the transmission rod 315, and there is no vibration at these positions.

[0034] Zero amplitude points 42 are also provided on both sides of the welding head body 314. The reinforcing ribs 41 are connected to the back plate 1 and the bracket 2 through the zero amplitude points 42. The zero amplitude points 42 can avoid vibration energy loss. Usually, zero amplitude points 42 are provided at the connection between the amplitude transformer 323 and the transmission rod 315, and at the connection between the transmission rod 315 and the welding head body 314. The absence of vibration at the zero amplitude points 42 can ensure the stability of welding while facilitating installation and integration by manufacturers.

[0035] The vibration absorbing member 4 also includes a rubber pad 43, which is fixedly mounted on the bottom of the back panel 1. Mounting holes 44 are arranged on the inner side of the rubber pad 43. The rubber pad 43 is made of silicone rubber material, which can isolate the vibration transmission between the fuselage and the outside world and reduce the impact of noise and vibration on the environment. The mounting hole 44 can be used to connect the back panel 1 connected to the rubber pad 43 with relevant welding equipment through screws.

[0036] When ultrasonic welding of workpieces is performed, the power source body 321, the gas source body 316 and the transmission rod 315 are separated by the conductive slip ring 313, so that the circular welding head body 314 can rotate synchronously with the material to be welded at high speed, and the traditional sliding friction method is replaced by rolling friction, which greatly eliminates the relative friction between the welding head and the material to be welded. Through the special mechanical structure design, the axial vibration generated by the transducer 322 and the amplitude transformer 323 is converted into the radial vibration of the welding head body 314, so that the entire circumferential surface of the circular welding head produces the same amplitude, and the pressure is applied vertically to the material to be welded by stretching the output shaft of the gas source body 316 to achieve the desired welding effect and avoid dislocation. The zero amplitude points 42 on both sides of the welding head body 314 and the amplitude transformer 323 where there is no vibration are used to connect the bracket 2 and the back plate 1, thereby ensuring the stability of welding. At the same time, the mounting holes 44 opened in the rubber pads 43 are fixed with screws to facilitate manufacturer installation and integration.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A welding vibration arm with a circular welding head for ultrasonic welding, comprising a back plate (1) and a bracket (2), wherein the back plate (1) is fixedly mounted on the bottom of the bracket (2), and is characterized in that: A processing assembly (3) is arranged on the top of the back plate (1), and a vibration absorbing member (4) is arranged on the outer side of the bracket (2); The processing assembly (3) comprises a transmission member (31), the transmission member (31) comprises a first segment (311), the first segment (311) is fixedly mounted on the top of the bracket (2), a second segment (312) is arranged at one end of the back plate (1) away from the first segment (311), and the first segment (311) and the second segment (312) are arranged in parallel; A conductive slip ring (313) is provided between the first section (311) and the second section (312) and on the top of the back plate (1); a welding head body (314) is installed on the side of the conductive slip ring (313) close to the first section (311); one end of the welding head body (314) protrudes from the surface of the first section (311); and the cross section of the welding head body (314) is circular.

2. A welding vibrating arm for ultrasonic welding with a circular welding head according to claim 1, characterized in that: The transmission member (31) further comprises a transmission rod (315), one end of the transmission rod (315) being connected to a conductive slip ring (313), and the other end of the transmission rod (315) being connected to an output shaft of an air source body (316), wherein the air source body (316) is fixedly mounted on the top of the back plate (1).

3. The welding vibrating arm for ultrasonic welding with a circular welding head according to claim 1, characterized in that: The processing assembly (3) further comprises a vibrating member (32), wherein the vibrating member (32) comprises a power source body (321), wherein the power source body (321) is fixedly mounted on an end of the back plate (1) away from the bracket (2), and an output shaft of the power source body (321) is connected to a transducer (322).

4. The welding vibrating arm for ultrasonic welding with a circular welding head according to claim 3, characterized in that: The other end of the transducer (322) is connected to a horn (323), and the transducer (322) is connected to a transmission rod (315) via the horn (323).

5. The welding vibrating arm for ultrasonic welding with a circular welding head according to claim 1, characterized in that: The vibration absorbing member (4) comprises reinforcing ribs (41), wherein the reinforcing ribs (41) are distributed on both sides of a first section (311) and a second section (312), wherein the first section (311) is connected to the second section (312) via the reinforcing ribs (41), and zero amplitude points (42) are respectively arranged at both ends of the reinforcing ribs (41).

6. A welding vibrating arm for ultrasonic welding with a circular welding head according to claim 5, characterized in that: Zero amplitude points (42) are also provided on both sides of the welding head body (314), and the reinforcing ribs (41) are connected to the back plate (1) and the bracket (2) via the zero amplitude points (42).

7. A welding vibrating arm for ultrasonic welding with a circular welding head according to claim 6, characterized in that: The vibration absorbing member (4) further comprises a rubber pad (43), wherein the rubber pad (43) is fixedly mounted on the bottom of the back plate (1), and mounting holes (44) are arranged on the inner side of the rubber pad (43).

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