CN105397267B - Ultrasonic welding device - Google Patents
Ultrasonic welding device Download PDFInfo
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- CN105397267B CN105397267B CN201410471937.7A CN201410471937A CN105397267B CN 105397267 B CN105397267 B CN 105397267B CN 201410471937 A CN201410471937 A CN 201410471937A CN 105397267 B CN105397267 B CN 105397267B
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Abstract
The invention discloses an ultrasonic welding device which is used for welding workpieces and comprises a positioning mechanism, a welding mechanism, a driving mechanism and a buffer mechanism, wherein the positioning mechanism is used for placing the workpieces, the welding mechanism comprises a welding head and a sliding seat, the sliding seat is connected to a support in a sliding mode, the welding head is used for contacting the workpieces, the driving mechanism comprises a driving piece and a pull rod, the driving piece drives the pull rod to move in a reciprocating mode, the buffer mechanism comprises an elastic piece and an adjusting piece, the adjusting piece is fixed to one end, far away from the driving piece, of the pull rod, and the elastic piece is connected between the adjusting piece and the sliding seat and used for providing restoring force of the sliding seat far away from a base. When the welding head contacts the workpiece for welding, the elastic piece generates resistance on the welding head, so that the welding pressure of the welding head is adjusted, the deformation of the workpiece during welding is reduced, and the quality of the workpiece is improved.
Description
Technical Field
The invention relates to the field of welding equipment, in particular to an ultrasonic welding device.
Background
With the development and progress of society and the popularization and application of new energy technology, people put forward higher requirements on novel batteries, and cylindrical lithium batteries occupy a place in the emerging battery field due to high energy-to-volume ratio.
At present, in domestic manufacturers for producing cylindrical lithium batteries, laser is often used for spot welding or ultrasonic welding when a combined cap is welded.
Only 3-4 points can be welded by laser welding, and when the number of welding points is increased, the cap and the lug can be overheated to influence the performance of the battery; when the number of welding points is too small, the conductivity is influenced, and the internal resistance of the battery is directly increased. In addition, the traditional laser welding needs two persons to cooperate, and the operating efficiency is low.
In the ultrasonic welding, the battery cap is usually damaged due to overlarge welding pressure, the product quality is influenced, and potential safety hazards exist.
Disclosure of Invention
The invention aims to provide an ultrasonic welding device for improving production quality.
In order to solve the technical problems, the invention provides an ultrasonic welding device, which is used for welding workpieces, wherein the ultrasonic welding device comprises a positioning mechanism, a welding mechanism, a driving mechanism and a buffering mechanism, the positioning mechanism comprises a bracket, a base and a workbench, the workbench is fixed on the base and used for placing the workpieces, the bracket is fixed on the base and positioned on one side of the workbench, the welding mechanism comprises an amplitude transformer, a welding head and a sliding seat, the sliding seat is connected on the bracket in a sliding manner, the sliding seat is arranged in a sliding manner along a direction close to or far away from the base, one end of the amplitude transformer is fixed on the sliding seat and used for being electrically connected with an ultrasonic generator and generating mechanical vibration, the length direction of the amplitude transformer is vertical to the sliding direction of the sliding seat, and the welding head is fixed at the other end of the amplitude transformer, and it is relative the workstation sets up for the contact the work piece, actuating mechanism includes driving piece and pull rod, the driving piece is fixed in on the base, the drive the pull rod is followed the sliding direction reciprocating motion of sliding seat, pull rod length direction is parallel the sliding direction of sliding seat, buffer gear includes elastic component and regulating part, the regulating part is fixed in the pull rod is kept away from driving piece one end, the elastic component connect in between regulating part and the sliding seat, be used for providing the sliding seat is kept away from the restoring force of base.
The workbench comprises a fixed block and a support column, the fixed block is fixed on the base, the support column is fixed on one side, far away from the base, of the fixed block and extends along the sliding direction of the sliding seat, a groove is formed in one end, far away from the fixed block, of the support column, and the groove is used for fixing the workpiece.
The sliding seat comprises an accommodating cavity, the open end of the accommodating cavity is located on one side, close to the base, of the sliding seat, the adjusting piece and the elastic piece are both accommodated in the accommodating cavity, and the elastic piece is compressed between the adjusting piece and the open end.
The workpiece is a cylindrical battery cap, the groove is a circular groove, and the groove is provided with a notch.
Wherein the amplitude of the welding head is 10-25 μm.
The welding mechanism comprises an energy converter which is fixed on the sliding seat and used for electrically connecting an ultrasonic generator with the ultrasonic frequency of 35K-50.0K Hz, converting a high-frequency electric signal of the ultrasonic generator into mechanical vibration and transmitting the mechanical vibration to the amplitude transformer.
The support comprises a first fixing plate and a second fixing plate, the cross section of the first fixing plate is opposite to that of the second fixing plate, the first fixing plate and the second fixing plate are fixed on the base, the cross section of the first fixing plate is vertical, a first sliding groove extending in the vertical direction is formed in one side of the second fixing plate, the second fixing plate is close to a second sliding groove extending in the vertical direction and formed in one side of the first fixing plate, the second sliding groove is opposite to that of the first sliding groove, and the sliding seat is connected between the first sliding groove and the second sliding groove in a sliding mode.
The first sliding groove and the second sliding groove are respectively provided with a damping piece at one end close to the base, and the damping pieces are used for providing restoring force for the sliding seat to be far away from the base.
The bracket further comprises a top plate, the top plate is fixed on the first fixing plate and the second fixing plate, the first fixing plate and the second fixing plate are far away from one end of the base, the sliding seat is located between the top plate and the base, a guide hole is formed in the top plate, and a guide rod extending to the guide hole is arranged on the sliding seat.
The driving piece is an air cylinder, and the elastic piece is a rectangular spring.
According to the ultrasonic welding device, the pull rod is driven by the driving piece to move along the sliding direction of the sliding seat, the adjusting piece is fixedly connected with one end, far away from the driving piece, of the pull rod, the elastic piece is connected between the adjusting piece and the sliding seat, the pull rod drives the sliding seat to slide, the elastic piece is used for providing restoring force, far away from the base, of the sliding seat, so that when the welding head contacts with a workpiece for welding, the elastic piece generates resistance on the welding head, the welding pressure of the welding head is adjusted, the deformation of the workpiece during welding is reduced, and the quality of the workpiece is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of an ultrasonic welding apparatus;
FIG. 2 is a schematic cross-sectional table view of the ultrasonic welding apparatus of FIG. 1;
FIG. 3 is a schematic view of a welding mechanism of the ultrasonic welding device of FIG. 1;
fig. 4 is a cross-sectional view of the welding mechanism of fig. 3 taken along IV-IV.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, an ultrasonic welding apparatus 100 according to an embodiment of the present invention includes a positioning mechanism 10, a welding mechanism 20, a driving mechanism 30 and a buffering mechanism 40. The positioning mechanism 10 is used for placing a workpiece (not shown), the welding mechanism 20 is used for welding the workpiece, the driving mechanism 30 is used for driving the welding mechanism 20 to move, and the buffer mechanism 40 is used for reducing the welding pressure of the welding mechanism 20 on the workpiece. The workpiece can be a lithium battery cap, a cable or other electronic components. In this embodiment, the workpiece is a battery cap of a cylindrical lithium battery.
Specifically, the positioning mechanism 10 includes a base 11, a bracket 12 and a worktable 13. The support 12 and the workbench 13 are both fixed on the base 11. The welding mechanism 20 is installed on the support 12, and the work piece is placed on the workbench 13.
In this embodiment, the base 11 is a rectangular plate, and the base 11 is made of a metal material. The base 11 can be fixed on the ground or placed on a production line platform. In this embodiment, the base 11 is fixed to a desktop. Of course, in other embodiments, the base may also be a circular plate.
In this embodiment, the bracket 12 includes a first fixing plate 121 and a second fixing plate 122 disposed opposite to each other, and a top plate 123. The first fixing plate 121 and the second fixing plate 122 are both square plates, and the cross sections of the first fixing plate and the second fixing plate are both vertically arranged. A first sliding groove (not shown) is formed in one side of the first fixing plate 121 close to the second plate 122, and the first sliding groove extends in a vertical direction. A second sliding groove 122a is formed in one side of the second fixing plate 122, which is close to the first fixing plate 12, the second sliding groove 122a extends along the vertical direction, and the second sliding groove 122a is disposed opposite to the first sliding groove. The welding mechanism 20 is connected between the first sliding chute and the second sliding chute 122a in a sliding manner. The top plate 13 is a square plate, and the top plate 13 is transversely arranged at one end of the first fixing plate 121 and the second fixing plate 122 far away from the base 11 and fixedly connected with the first fixing plate 121 and the second fixing plate 122. The top plate 123 is horizontally disposed in cross section and is disposed opposite to the base 11. The top plate 123 is provided with a guide hole (not shown) for guiding the welding mechanism. In the present embodiment, the first fixing plate 121, the second fixing plate 122, and the top plate 123 are made of metal. The structure of the bracket 12 is more stable, and the service life is longer. Of course, in other embodiments, the bracket may be formed by overlapping a plurality of steel pipes.
In this embodiment, the working table 13 includes a fixed block 131 and a supporting column 132. The fixing block 131 is a rectangular block. The fixed block 131 is connected to the base 11 through screws, so that the workbench 13 is convenient to detach or replace, and meanwhile the fixed block 131 enables the workbench 13 to be more stable in structure. The supporting column 132 is a cylinder, and the length direction of the supporting column 132 extends along the vertical direction. The supporting column 132 is fixed on one side of the fixing block 131 far away from the base 11. The supporting column 132 and the fixing block 133 are integrally disposed to enhance the vibration resistance of the working table 13. A groove 132a is formed at one end of the supporting column 132, which is far away from the fixing block 131. The groove 132a is a circular groove. The workpiece is placed in the groove 132a while being fixed so that the workpiece does not move randomly during welding. The groove 132a is provided with a notch 132b, and the notch 132b is convenient for taking out the workpiece, so that the workpiece can be clamped by hands or a clamp on the periphery side, the working efficiency of the ultrasonic welding device 100 is improved, and meanwhile, the ultrasonic welding device can be adapted to workpieces of various specifications. Of course, in other embodiments, the supporting column may also be a square cylinder, and the groove may also be a designed reticulate pattern, and may also be a square groove, or a pipe-shaped groove, or an arc-shaped groove, which is adapted to a groove of an electronic component.
The welding mechanism 20 includes a sliding seat 21, a transducer 22, a horn 23, and a horn 24. The sliding seat 21 is a rectangular block, the sliding seat 21 is slidably connected to the bracket 12, and the sliding seat 21 is slidably disposed along a direction close to or far away from the base 11. In this embodiment, the sliding seat 21 is slidably connected between the first sliding chute and the second sliding chute 122a, and the sliding direction of the sliding seat 21 is set along the vertical direction. Specifically, two sides of the sliding seat 21 are respectively provided with a sliding block 21a, and the two sliding blocks 21a are respectively connected in the first sliding chute and the second sliding chute 122a in a sliding manner. Of course, in other embodiments, if the bracket is a sliding rod, the sliding seat may further be provided with a sliding hole, and the bracket is slidably connected to the sliding hole of the sliding seat; the sliding seat can also be provided with a guide rod corresponding to the guide hole, and the guide rod extends into the guide hole along the vertical direction and is connected in the guide hole in a sliding manner.
The transducer 22 is fixed on the sliding seat 21 and is used for electrically connecting an ultrasonic generator (not shown). In this embodiment, the transducer 22 is connected to an ultrasonic generator with an ultrasonic frequency of 35K to 50.0 khz, specifically, the transducer 22 is connected to an ultrasonic generator with an ultrasonic frequency of 40 khz, and converts a high-frequency electrical signal of the ultrasonic generator into mechanical vibration, which is transmitted to the horn 23, so that the horn 23 generates high-frequency vibration. Of course, in other embodiments, the transducer may also be switched in at 35 khz or 43.5 khz ultrasonic frequencies.
The amplitude transformer 23 is fixed on the sliding seat 21, the amplitude transformer 23 converts the mechanical vibration of the transducer 22 into stable high-frequency mechanical vibration through mechanical transmission, the length of the amplitude transformer 23 is perpendicular to the sliding direction of the sliding seat 21, and in the embodiment, the length direction of the amplitude transformer 23 is horizontally arranged. One end of the amplitude transformer 23 is electrically connected with the ultrasonic generator through the transducer 22, the other end is fixedly connected with the welding head 24, and the high-frequency mechanical vibration is gathered to the welding head 24, so that the welding head 24 generates vibration. Of course, in other embodiments, the length of the horn may be other than horizontally.
The welding head 24 is fixed to one end of the horn 23, is arranged opposite to the worktable 13, and is used for contacting the workpiece. In the present embodiment, the amplitude of the horn 24 is 10 μm to 25 μm, the horn 24 faces the groove 132a of the supporting column 132 in the vertical direction, and when the slide base 21 moves downward close to the base 11, the horn 24 approaches the workpiece on the supporting column 132 and contacts the workpiece, and transmits the mechanical vibration of the horn 23 to the workpiece, so that the workpiece is rubbed by the vibration, thereby generating heat welding. The welding head 24 is rectangular block-shaped, and the welding head 24 increases the welding area of the workpiece. Of course, in other embodiments, the horn may have other shapes.
The driving mechanism 30 includes a driving member 31 and a pull rod 32, the driving member 31 is fixed on the base 11, and drives the pull rod 32 to move back and forth along the sliding direction of the sliding seat 21. In this embodiment, the driving member 31 is an air cylinder, and the driving member 31 uses pneumatic pressure to push the pull rod 32 to extend and contract. The length direction of the pull rod 32 extends along the sliding direction of the sliding seat 21. In this embodiment, the pull rod 32 is vertically disposed in the length direction and slides in the vertical direction. Of course, in other embodiments, the driving member may also be a motor, and if the sliding direction of the sliding seat is horizontally arranged, the sliding direction of the pull rod may also be horizontally arranged.
The buffering mechanism 40 includes an elastic member (not shown) and an adjusting member 41, the adjusting member 41 is fixed to an end of the pull rod 32 away from the driving member 31, and the elastic member is connected between the sliding seat 21 and the adjusting member 41. In this embodiment, the adjusting member 41 is a cylinder. One end of the adjusting member 41 is fixedly connected to the pull rod 32, and the other end extends toward the sliding seat 21. The end surface of the adjusting member 41 near one end of the sliding seat 21 is provided with a flange 41a, and the elastic member is connected between the flange 41a and the sliding seat 21 and is used for providing a restoring force for the sliding seat 21 to move away from the base 11. In this embodiment, the elastic member is a rectangular spring, and the elastic member is sleeved on the adjusting member 41. The sliding seat 21 includes an accommodating cavity 21a, an opening end of the accommodating cavity 21a is located at a side of the sliding seat 21 close to the base 11, the adjusting member 41 and the elastic member are both accommodated in the accommodating cavity 21a, and the elastic member is compressed between the flange 41a of the adjusting member 41 and the opening end. When the pull rod 32 drives the sliding seat 21 to be close to the workpiece on the supporting column 13, and the welding head 24 contacts the workpiece to weld, the elastic part generates resistance to prevent the welding head 24 from pressing the workpiece, and generates restoring force for keeping the sliding seat 21 away from the base 11, so that the welding pressure of the workpiece is reduced, the deformation of the workpiece during welding is reduced, and the processing quality of the workpiece is improved. In the present embodiment, when the welding head 24 welds a workpiece, the welding pressure on the workpiece is between 0.1N and 5N, and the welding pressure can be adjusted according to different products. Of course, in other embodiments, the damping mechanism may further include a damping member (not shown) respectively disposed at one end of the first sliding chute and the second sliding chute 122a close to the base 11, the damping member being configured to provide a restoring force for the sliding seat 21 away from the base 11; if the slide seat 21 is provided with the guide rod on the side away from the base 11, a rectangular spring may be further sleeved on the guide rod, and the rectangular spring is connected between the top plate and the slide seat and used for providing a restoring force of the slide seat close to the top plate.
According to the ultrasonic welding device, the pull rod is driven by the driving piece to move along the sliding direction of the sliding seat, the adjusting piece is fixedly connected with one end, far away from the driving piece, of the pull rod, the elastic piece is connected between the adjusting piece and the sliding seat, the pull rod drives the sliding seat to slide, the elastic piece is used for providing restoring force, far away from the base, of the sliding seat, so that when the welding head contacts with a workpiece for welding, the elastic piece generates resistance on the welding head, the welding pressure of the welding head is adjusted, the deformation of the workpiece during welding is reduced, and the quality of the workpiece is improved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (5)
1. An ultrasonic welding device is used for welding workpieces and comprises a positioning mechanism, a welding mechanism, a driving mechanism and a buffering mechanism, wherein the positioning mechanism comprises a support, a base and a workbench, the workbench is fixed on the base and used for placing the workpieces, the support is fixed on the base and positioned on one side of the workbench, the ultrasonic welding device is characterized in that the welding mechanism comprises an amplitude transformer, a welding head and a sliding seat, the sliding seat is connected on the support in a sliding manner, the sliding seat is arranged in a sliding manner along a direction close to or far away from the base, one end of the amplitude transformer is fixed on the sliding seat and used for being electrically connected with an ultrasonic generator and generating mechanical vibration, the length direction of the amplitude transformer is vertical to the sliding direction of the sliding seat, the welding head is fixed at the other end of the amplitude transformer and is arranged relative to the workbench, the driving mechanism comprises a driving part and a pull rod, the driving part is fixed on the base and drives the pull rod to reciprocate along the sliding direction of the sliding seat, the length direction of the pull rod is parallel to the sliding direction of the sliding seat, the buffer mechanism comprises an elastic part and an adjusting part, the adjusting part is fixed at one end of the pull rod, which is far away from the driving part, and the elastic part is connected between the adjusting part and the sliding seat and used for providing restoring force for the sliding seat, which is far away from the base;
the welding mechanism comprises an energy converter which is fixed on the sliding seat and is used for being electrically connected with an ultrasonic generator, converting a high-frequency electric signal of the ultrasonic generator into mechanical vibration and transmitting the mechanical vibration to the amplitude transformer;
the bracket comprises a first fixing plate and a second fixing plate, the cross sections of the first fixing plate and the second fixing plate are opposite, the first fixing plate and the second fixing plate are fixed on the base, the cross sections of the first fixing plate and the second fixing plate are vertical, a first sliding groove extending in the vertical direction is formed in one side, close to the second fixing plate, of the first fixing plate, a second sliding groove extending in the vertical direction is formed in one side, close to the first fixing plate, of the second fixing plate, the second sliding groove is opposite to the first sliding groove, and the sliding seat is connected between the first sliding groove and the second sliding groove in a sliding mode;
damping pieces are arranged at one ends, close to the base, of the first sliding groove and the second sliding groove and are used for providing restoring force for the sliding seat to be far away from the base;
the support further comprises a top plate, the top plate is fixed on the first fixing plate and the second fixing plate, the first fixing plate and the second fixing plate are far away from one end of the base, the sliding seat is located between the top plate and the base, a guide hole is formed in the top plate, and a guide rod extending to the guide hole is arranged on the sliding seat.
2. The ultrasonic welding device of claim 1, wherein the worktable comprises a fixed block and a supporting column, the fixed block is fixed on the base, the supporting column is fixed on one side of the fixed block, which is far away from the base, and extends along the sliding direction of the sliding seat, and a groove is formed at one end of the supporting column, which is far away from the fixed block, and is used for fixing the workpiece.
3. The ultrasonic welding device of claim 1, wherein the sliding seat comprises a receiving cavity, an open end of the receiving cavity is located on a side of the sliding seat close to the base, the adjusting member and the elastic member are both received in the receiving cavity, and the elastic member is compressed between the adjusting member and the open end.
4. The ultrasonic welding device of claim 2, wherein the workpiece is a cylindrical battery cap, the recess is a circular recess, and the recess is notched.
5. The ultrasonic welding apparatus of claim 4, wherein the horn has an amplitude of 10 to 25 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410471937.7A CN105397267B (en) | 2014-09-11 | 2014-09-11 | Ultrasonic welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410471937.7A CN105397267B (en) | 2014-09-11 | 2014-09-11 | Ultrasonic welding device |
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| CN105397267A CN105397267A (en) | 2016-03-16 |
| CN105397267B true CN105397267B (en) | 2020-10-13 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106217851A (en) * | 2016-07-11 | 2016-12-14 | 杨林 | Novel ultrasonic welder |
| CN106695125A (en) * | 2017-02-20 | 2017-05-24 | 上海海事大学 | System and method for improving laser processing surface integrity of workpiece on line |
| CN106944738A (en) * | 2017-05-03 | 2017-07-14 | 广州市科普超声电子技术有限公司 | A kind of wave welding head of ultrasonic wave and device for ultrasonic welding |
| CN108247192A (en) * | 2018-02-06 | 2018-07-06 | 南京航空航天大学 | A kind of Double-linkage clamps metal foil ultrasound firm joint device |
| CN108247193A (en) * | 2018-03-12 | 2018-07-06 | 广州市科普超声电子技术有限公司 | A kind of ultrasonic brazing unit |
| CN109332926A (en) * | 2018-10-12 | 2019-02-15 | 安徽正熹标王新能源有限公司 | A kind of lead storage battery tab auto-manual adjusting spot welding device |
| CN110369852A (en) * | 2019-08-05 | 2019-10-25 | 珠海冠宇电池有限公司 | A kind of tab welding card slot and the method for carrying out tab welding using the card slot |
| CN111843180B (en) * | 2020-07-20 | 2021-10-22 | 东莞理工学院 | Diagnostic equipment with monitoring probe capable of being adjusted in angle for ultrasonic welding machine |
| CN112792449B (en) * | 2021-03-04 | 2023-12-22 | 南京比飞达新能源科技有限公司 | Cylindrical cell ultrasonic welding device |
| CN113510358B (en) * | 2021-06-25 | 2022-08-16 | 帕伦工业技术(上海)有限公司 | Ultrasonic welding device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5772100A (en) * | 1996-03-22 | 1998-06-30 | American Technology, Inc. | Ultrasonic welder with dynamic nodal horn support |
| CN2810769Y (en) * | 2005-07-26 | 2006-08-30 | 林瑞添 | Large-scale motor-drive-lifting ultrasonic machine |
| CN2815527Y (en) * | 2005-07-26 | 2006-09-13 | 林瑞添 | Integrated motor lifting supersonic machine |
| CN101318258B (en) * | 2008-06-17 | 2012-05-23 | 伟速达（昆山）安全系统有限公司 | Ultrasonic spot welding machine for back cover lock |
| CN201625835U (en) * | 2010-01-12 | 2010-11-10 | 上海晨凤实业发展有限公司 | Ultra-sonic welding machine |
| JP5779761B2 (en) * | 2011-09-15 | 2015-09-16 | 精電舎電子工業株式会社 | Ultrasonic welding equipment, ultrasonic welding equipment, wiring equipment |
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