CN214417978U

CN214417978U - Welding fixture

Info

Publication number: CN214417978U
Application number: CN202023045796.2U
Authority: CN
Inventors: 王乾; 于秀东; 刘兰; 王文英; 陈丽; 肖曲; 高云松; 郭启军; 高云峰
Original assignee: Han s Laser Technology Industry Group Co Ltd
Current assignee: Shenzhen Han's Lithium Battery Intelligent Equipment Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-10-19
Anticipated expiration: 2030-12-17

Abstract

The application relates to a welding jig, include: a work table; the positioning assembly is arranged on the workbench and used for bearing, positioning and clamping the workpiece; the pressing assembly is movably arranged on the workbench and used for pressing the workpiece borne on the positioning assembly, and the pressing assembly can be abutted against the positioning assembly so as to enable the positioning assembly to clamp the workpiece; and the driving assembly is in driving connection with the pressing assembly and drives the pressing assembly to move in a first direction and a second direction. Therefore, the welding fixture does not need to be provided with a driving device on the positioning assembly, so that the welding fixture is simpler and more compact in structure, and meanwhile, the cost can be reduced.

Description

Welding fixture

Technical Field

The application relates to the technical field of lithium battery processing, in particular to a welding fixture.

Background

In recent years, the development of new energy is greatly encouraged and supported by the nation, and the demand of a plurality of manufacturers on new energy batteries is greatly increased. Various automated devices for producing batteries have been developed. The power supply battery of most present intelligent wrist-watches all adopts miniature square encapsulation lithium cell, and this kind of battery is small, and the machining precision requires highly on the encapsulation. In the combination link of the upper cover and the bottom shell of the battery, a welding fixture is mostly adopted for positioning, and the packaging is realized in a laser welding mode. Because the battery is small, the required clamp is compact in structure, sensitive in action and high in machining efficiency.

The existing clamp has more installation structural parts, large proportion of installation space, low processing efficiency and more complex control system.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, the present application provides a welding fixture to solve the above-mentioned problems of the background art.

The technical scheme adopted by the application is as follows: a welding fixture, comprising:

a work table;

the positioning assembly is arranged on the workbench and used for bearing, positioning and clamping the workpiece;

the pressing assembly is movably arranged on the workbench and used for pressing the workpiece borne on the positioning assembly, and the pressing assembly can be abutted against the positioning assembly so as to enable the positioning assembly to clamp the workpiece; and

and the driving assembly is in driving connection with the pressing assembly and drives the pressing assembly to move in a first direction and a second direction.

Furthermore, the positioning assembly comprises a bearing seat with a profiling groove, and a limiting structure and a clamping structure which are oppositely arranged on the bearing seat, wherein the clamping structure can be abutted against the pressing assembly, the pressing assembly drives the clamping structure to move towards the limiting structure, and the workpiece is clamped.

Further, the clamping structure includes a first clamping member and a second clamping member; the first clamping piece and the second clamping piece can be respectively abutted against the pressing assembly, so that the first clamping piece is matched with the limiting structure in the third direction to clamp the workpiece, and the second clamping piece is matched with the limiting structure in the first direction to clamp the workpiece.

Further, the first clamping piece and the second clamping piece respectively comprise a clamping slide rail, a clamping block and a compression spring; the clamping block is movably arranged on the bearing seat through a clamping slide rail, and the compression spring is arranged between the clamping block and the bearing seat; the clamping block in the first clamping piece is further provided with a follow-up bearing, and the first clamping piece can be abutted to the pressing assembly through the follow-up bearing.

Further, a buffer base plate is arranged at the abutting area of the clamping block in the second clamping piece or the abutting area of the pressing assembly, and the pressing assembly abuts against the clamping block in the second clamping piece through the buffer base plate.

Further, the pressing assembly comprises a pressing support seat and a pressing plate; the pressing plate is movably arranged along the second direction and is movably arranged on the pressing support seat, the pressing support seat is movably arranged on the workbench along the first direction, and the pressing plate is further provided with a butting part which is used for being abutted against the clamping structure.

Furthermore, the pressing support seat also comprises support plates and connecting plates which are arranged on two sides of the positioning assembly; the abutting portion is arranged on the supporting plate, the connecting plate is connected with the supporting plate, the supporting plate is movably arranged on the workbench along a first direction, the pressing plate is movably arranged on the supporting plate along a second direction, the supporting plate can abut against the first clamping piece through the abutting portion, and the connecting plate can abut against the second clamping piece.

Furthermore, a first positioning structure is arranged on the pressure strip, and a second positioning structure matched with the first positioning structure is arranged on the bearing seat.

Further, the driving assembly comprises a translation driving device and a lifting driving device; the translation driving device is in driving connection with the pressing support seat, drives the pressing support seat to move along a first direction, and enables the pressing support seat to be respectively abutted against a follow-up bearing in the first positioning structure and a clamping block in the second positioning structure; and the lifting driving device is in driving connection with the pressing plate, drives the pressing plate to move along the second direction, and enables the pressing plate to press the workpiece.

Furthermore, the lifting driving device is connected with the pressing plate through a driving connecting piece, a through hole for accommodating the driving connecting piece is formed in the pressing plate, and a gap is reserved between the driving connecting piece and the inner wall of the through hole.

Further, the driving connecting piece comprises a connecting block arranged in the through hole, a gap is reserved between the connecting block and the inner wall of the through hole, and abutting blocks used for abutting against the pressing plate are further arranged at the upper end and the lower end of the connecting block.

Compared with the prior art, the method has the following technical effects:

the application provides a welding jig, through locating component on the workstation, compress tightly subassembly and drive assembly to when utilizing the drive assembly drive to compress tightly the removal of subassembly horizontal direction, compress tightly the subassembly can with the locating component butt, and make locating component press from both sides tight work piece, when compressing tightly the top that the subassembly is located the work piece, drive assembly still can drive the tight subassembly of compression and compress tightly the work piece, accomplishes the tight location of clamp to the work piece. Therefore, the welding fixture does not need to be provided with a driving device on the positioning assembly, so that the welding fixture is simpler and more compact in structure, and meanwhile, the cost can be reduced.

Drawings

FIG. 1 is a block diagram of a welding fixture according to the present application;

FIG. 2 is a block diagram of a positioning assembly of the welding fixture of the present application;

FIG. 3 is an exploded view of a positioning assembly in the welding fixture of the present application;

FIG. 4 is a block diagram of a hold-down assembly of the welding fixture of the present application;

fig. 5 is a second structural diagram of a pressing assembly in the welding jig of the present application.

Reference numbers in the figures:

10. a work table;

20. a positioning assembly; 21. a bearing seat; 22. a limiting structure; 23. a clamping structure; 211. carrying the jig; 212. a jig support; 213. profiling grooves; 221. a first limit piece; 222. a second limiting member; 231. a first clamping member; 232. a second clamping member; 2121. a capacity bit; 2122. a through hole; 2311. clamping the slide rail; 2312. a push block; 2313. a push block connecting piece; 2314. A compression spring; 2315. a follower bearing; 2316. mounting grooves; 2317. positioning holes;

30. a compression assembly; 31. translating the slide rail; 32. lifting the slide rail; 33. pressing the supporting seat; 34. a compression plate; 35. briquetting; 36. avoiding vacant positions; 37. adjusting screws; 38. a shock absorber; 39. a cushion plate; 331. a support plate; 332. a connecting plate; 333. An abutting portion;

40. a drive assembly; 41. a translation drive device; 42. a lift drive; 43. a drive connection; 44. a through hole; 431. connecting blocks; 432. a holding block;

50. and (5) a workpiece.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

A welding jig according to an embodiment of the present application is described in detail below with reference to the accompanying drawings.

The application discloses welding jig, this welding jig can realize fixing a position and fix work piece 50, specifically, this work piece 50 can be the lithium cell, and in the encapsulation link of upper cover and drain pan in the lithium cell, the above-mentioned welding jig of accessible fixes a position upper cover and drain pan to usable laser or other welding methods accomplish the encapsulation of upper cover and drain pan.

Referring to fig. 1, the welding jig includes a worktable 10, a positioning assembly 20, a pressing assembly 30, and a driving assembly 40, wherein the worktable 10 serves as a base member of the welding jig and is used for providing a mounting base for the positioning assembly 20, the pressing assembly 30, the driving assembly 40, and related components.

And the positioning assembly 20 is arranged on the workbench 10 and used for bearing the workpiece 50 to be welded, positioning the workpiece 50 and clamping the workpiece 50.

The pressing assembly 30 is movably arranged on the workbench 10 and used for pressing the workpiece 50 carried on the positioning assembly 20, and the pressing assembly 30 can also abut against the positioning assembly 20 in the action process, so that the positioning assembly 20 acts to clamp the workpiece 50 carried by the positioning assembly 20.

The driving assembly 40, which is in driving connection with the pressing assembly 30, can drive the pressing assembly 30 to move in a first direction and a second direction, wherein the first direction can be understood as being along the Y-axis direction, and the second direction can be understood as being along the Z-axis direction. During the movement of the pressing assembly 30 along the Y-axis direction, the pressing assembly 30 can abut against the positioning assembly 20, and provide a force along the X-axis direction and the Y-axis direction to the positioning assembly 20, so that the pressing assembly 30 clamps the workpiece 50. According to the scheme, the pressing assembly 30 provides power for the positioning assembly 20 to enable the positioning assembly 20 to act, and a driving device does not need to be additionally arranged on the positioning assembly 20, so that the whole welding fixture is simpler and more compact in structure and lower in cost.

Referring to fig. 2, the positioning assembly 20 includes a bearing seat 21 having a contour groove 213, a limiting structure 22, and a clamping structure 23, wherein the limiting structure 22 and the clamping structure 23 are disposed on the bearing seat 21, and the clamping structure 23 can abut against the pressing assembly 30, and the pressing assembly 30 drives the clamping structure 23 to move, so that the clamping structure 23 and the limiting structure 22 cooperate with each other to position and clamp the workpiece 50 in the contour groove 213.

Further, the clamping structure 23 includes a first clamping member 231 and a second clamping member 232, the first clamping member 231 and the second clamping member 232 are movably disposed on the bearing seat 21, and the first clamping member 231 can abut against the pressing assembly 30, so that the first clamping member 231 cooperates with the limiting structure 22 to clamp the workpiece 50 in a third direction, wherein the third direction can be understood as being along the X-axis direction; the second clamp member 232 can abut the pressing assembly 30 such that the second clamp member 232 cooperates with the limiting structure 22 in the Y-axis direction to clamp the workpiece 50.

The position limiting structure 22 includes a first limiting member 221 disposed opposite to the first clamping member 231, and a second limiting member 222 disposed opposite to the second clamping member 232, wherein the first limiting member 221 and the second limiting member 222 respectively include at least one limiting block for limiting a position of the workpiece 50, for example, a position of a top cover on a bearing table in a lithium battery.

Specifically, the structure of the first clamping member 231 and the structure of the second clamping member 232 may be partially the same, i.e., a clamping slide rail 2311, a clamping block, and a compression spring 2314 are included, respectively; the clamping block is movably arranged on the bearing seat 21 through a clamping slide rail 2311, and a compression spring 2314 is arranged between the clamping block and the bearing seat 21. The clamping block in the first clamping member 231 is further provided with a follow-up bearing 2315, the first clamping member 231 can be abutted to the pressing assembly 30 through the follow-up bearing 2315, when the pressing assembly 30 moves along the Y-axis direction, the pressing assembly is abutted to the follow-up bearing 2315 and extrudes the follow-up bearing 2315, so that the follow-up bearing 2315 drives the clamping block to move along the X-axis direction on the clamping slide rail 2311, and the action of the first clamping member 231 is realized.

Since the moving direction of the second clamping member 232 is consistent with the moving direction of the pressing assembly 30, that is, both the second clamping member 232 and the pressing assembly 30 move along the Y-axis direction, the pressing assembly 30 can push the clamping blocks in the second clamping member 232 to move along the Y-axis direction on the clamping slide 2311, that is, the action of the second clamping member 232 is realized.

Further, the carrying seat 21 includes a carrying fixture 211 and a fixture support 212, the carrying fixture 211 is provided with the above-mentioned contour groove 213, and the carrying fixture 211 can be disposed on the workbench 10 through the fixture support 212, the contour groove 213 on the carrying fixture 211 is used for carrying and limiting the workpiece 50, for example, can carry and limit the bottom shell in the lithium battery; wherein, the bottom of the jig support 212 may be provided with a receiving position 2121, and the receiving position 2121 may be used to receive the clamping structure 23 and a part of the driving assembly 40, so as to save the installation space on the worktable 10, and make the overall structure look more compact; meanwhile, through holes 2122 may be further provided at both sides of the jig support 212, and the through holes 2122 may facilitate installation of the clamping structure 23.

In order to prevent the pressing assembly 30 from interfering with the first clamping member 231 and the second clamping member 232 during the moving process, the clamping slide track 2311 of the first clamping member 231 and the second clamping member 232 may be disposed at the bottom of the jig support 212, and a mounting groove 2316 is further disposed on the bearing jig 211, as shown in fig. 3, the clamping block movably connected to the clamping slide track 2311 further includes a push block 2312 and a push block connector 2313, the push block 2312 is movably disposed in the mounting groove 2316, the push block connector 2313 is in an "L" shaped structure, the push block connector 2313 is movably disposed at the bottom of the jig support 212 through the clamping slide track 2311, and one end of the push block connector 2313 passes through the jig support 212 to be connected to the push block 2312, and a compression spring 2314 is disposed between the push block connector 2313 and the side wall of the jig support 212, wherein the other end of the push block connector 2313 of the first clamping member 231 is connected to the follower bearing 5 through a through the through hole 2122 on the jig support 212, so that the follower bearing 2315 can abut the hold-down assembly 30.

Further, to prevent the clamping block of the second clamping member 232 from rigidly colliding with the hold-down assembly 30, a buffer pad 39 may be disposed on the hold-down assembly 30 at the abutment region, or on the second clamping member 232 at the abutment region, and referring to fig. 4, the buffer pad 39 may be disposed on the region of the hold-down assembly 30 that contacts the clamping block, or in other ways, the buffer pad 39 may be disposed on the clamping block.

As shown in fig. 4, the pressing assembly 30 includes at least one translation slide rail 31, at least one lifting slide rail 32, a pressing support seat 33, and a pressing plate 34; the pressing plate 34 is movably arranged on the pressing support seat 33 along the Z-axis direction through the lifting slide rail 32, the pressing support seat 33 is movably arranged on the workbench 10 along the Y-axis direction through the translation slide rail 31, and the pressing support seat 33 can be abutted against the first clamping piece 231 and the second clamping piece 232 in the clamping structure 23, wherein the pressing support seat 33 is further provided with an abutting portion 333, and the pressing support seat 33 is conveniently abutted against the first clamping piece 231 through the abutting portion 333. The pressing plate 34 can move to the upper side of the bearing fixture 211 along the Y-axis direction through the pressing support seat 33, meanwhile, the pressing support seat 33 abuts against the first clamping member 231 and the second clamping member 232 in the moving process, and after the pressing plate 34 moves to the upper side of the bearing fixture 211, the pressing plate 34 can move along the Z-axis direction to press the workpiece 50.

Further, a pressing block 35 may be further disposed on the pressing plate 34, so that the pressing plate can press the workpiece better, and in other manners, the pressing plate 34 may also be a boss structure.

The pressing support seat 33 further comprises support plates 331 and connecting plates 332 arranged on two sides of the positioning assembly 20, the abutting portions 333 are arranged on the support plates 331, the connecting plates 332 are connected with the support plates 331 on two sides, at least one translation slide rail 31 is arranged corresponding to each support plate 331, the support plates 331 are movably arranged on the translation slide rails 31 and move along the Y-axis direction, wherein the support plates 331 and the connecting plates 332 can abut against the clamping structure 23, specifically, the support plates 331 can abut against a follower bearing 2315 in the first clamping piece through the abutting portions 333, the connecting plates 332 can abut against a push block connecting piece 2313 in the second clamping piece, and the connecting plates 332 can also abut against the push block connecting piece 2313 through a buffer cushion plate 39 arranged on the connecting plates 332 or a buffer cushion plate 39 arranged on the push block connecting piece 2313 in the second clamping piece; the pressing plate 34 may adopt a "U" shaped structure, and two sides of the pressing plate 34 may be movably disposed at the outer side of the supporting plate 331 through the lifting slide rail 32 to move along the Z-axis direction.

Further, an adjusting screw 37 and a shock absorber 38 may be further disposed on the translation rail 31, the adjusting screw 37 and the shock absorber 38 are disposed at two ends of the translation rail, the adjusting screw 37 may be used to adjust a stroke of the translation rail 31, and the shock absorber 38 may be used to provide a buffer for the translation rail 31.

Further, the pressing block 35 and the pressing plate 34 may further have a space-avoiding portion 36, and the space-avoiding portion 36 is provided to facilitate welding of the workpiece 50 by a laser welding apparatus or other welding apparatuses.

Furthermore, a first positioning structure is further arranged on the pressing plate, a second positioning structure is arranged on the bearing seat matched with the first positioning structure, and the pressing block 35 can be accurately pressed on the workpiece 50 on the bearing jig 211 through the first positioning structure and the second positioning structure. Specifically, the first positioning structure is a positioning column (not labeled in the figure) disposed on the pressing block 35, the second positioning structure is a positioning hole 2317 disposed on the bearing fixture 211, and the pressing block 35 can be positioned and inserted into the positioning hole 2317 in the descending process, so as to achieve the positioning effect. In other manners, the positioning posts may also be disposed on the pressing plate 34, and the positioning holes 2317 may also be disposed on the jig support 212.

Referring to fig. 5, the driving assembly 40 includes a translation driving device 41 and a lifting driving device 42; the translation driving device 41 is in driving connection with the pressing support seat 33 in the pressing assembly 30, drives the pressing assembly 30 to move along the Y-axis direction, moves the pressing plate in the pressing assembly 30 to the upper side of the workpiece 50, and enables the pressing support seat 33 to be respectively abutted with the follow-up bearing 2315 in the first positioning structure and the clamping block in the second positioning structure; the lifting driving device 42 is in driving connection with the pressing plate 34, drives the pressing plate 34 to move along the Z-axis direction, and enables the pressing plate 34 to drive the pressing plate to move to press the workpiece 50.

Specifically, the translation driving device 41 is disposed on the worktable 10 and located in the accommodating position 2121 in the jig support 212, and the driving end of the translation driving device 41 is connected to the connecting plate 332 of the pressing support seat 33; the lifting driving device 42 is disposed on the connecting plate 332, and a driving end of the lifting driving device 42 is connected to the pressing plate 34 to drive the pressing plate to move. The translation driving means 41 and the elevation driving means 42 may employ air cylinders.

Further, the driving end of the lifting driving device 42 is connected with the pressing plate 34 through a driving connecting piece 43, a through hole 44 for accommodating the driving connecting piece 43 is arranged on the pressing plate 34, and a gap is reserved between the driving connecting piece and the inner wall of the through hole 44. The drive connection 43 prevents the connection between the drive end of the lift drive 42 and the hold-down plate 34 from being stressed and becoming deformed or broken.

The reason for the stress is that the lifting driving device 42 is disposed on the connecting plate 332 in the pressing support seat 33 and can move along the Y-axis direction along with the connecting plate 332, the driving end of the lifting driving device 42 is fixedly connected with the pressing plate 34, and the pressing plate 34 is movably disposed on the supporting plate 331 in the pressing support seat 33 through the lifting slide rail 32, so that when the translation driving device 41 drives the pressing support seat 33 to move along the Y-axis direction, the pressing plate 34 moves along the Y-axis direction along with the pressing support seat 33 through the lifting slide rail 32 instead of directly driving the pressing plate 34 with the pressing support seat 33, which results in a horizontal displacement between the pressing support seat 33 and the pressing plate 34, and further causes the driving end of the lifting driving device 42 to receive a force in the Y-axis direction, and when the driving end of the lifting driving device 42 drives the pressing plate 34 to move along the Z-axis direction, the driver end is again subjected to a Z-direction force, which may cause deformation or fracture.

Specifically, a through hole 44 is formed in a region of the pressing plate 34 connected to the driving end of the lifting driving device 42, and the driving end of the lifting driving device 42 is movably disposed in the through hole 431 through the connector and can drive the pressing plate 34 to move along the Y-axis direction.

The connector includes connecting block 431 and establishes and is used for holding supporting of pressure strip 34 at connecting block 431 both ends and hold piece 432, supports and holds piece 432 and is convenient for the connector to drive pressure strip 34 and removes along vertical direction, leaves the clearance between connecting block 431 and the through-hole 44 inner wall, prevents that the connector from receiving the horizontal pulling force of pressure strip 34, and then prevents that lift drive 42's drive end from receiving the stress of horizontal direction.

Finally, it should be noted that: although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A welding fixture, comprising:

a work table;

2. The welding fixture of claim 1, wherein the positioning assembly comprises a carrier having a contoured slot, and a retaining structure and a clamping structure disposed opposite each other on the carrier, wherein the clamping assembly is adapted to abut the clamping structure to urge the clamping structure toward the retaining structure and clamp the workpiece.

3. The welding fixture of claim 2, wherein the clamping structure comprises a first clamping member and a second clamping member; the first clamping piece and the second clamping piece can be respectively abutted against the pressing assembly, so that the first clamping piece is matched with the limiting structure in the third direction to clamp the workpiece, and the second clamping piece is matched with the limiting structure in the first direction to clamp the workpiece.

4. The welding fixture of claim 3, wherein the first clamping member and the second clamping member each comprise a clamping slide, a clamping block, and a compression spring; the clamping block is movably arranged on the bearing seat through a clamping slide rail, and the compression spring is arranged between the clamping block and the bearing seat; the clamping block in the first clamping piece is further provided with a follow-up bearing, and the first clamping piece can be abutted to the pressing assembly through the follow-up bearing.

5. The welding fixture of claim 4, wherein a buffer shim plate is provided on the clamping block in the second clamp member or on the hold-down assembly, the hold-down assembly abutting the clamping block in the second clamp member through the buffer shim plate.

6. The welding jig of any one of claims 3 to 5, wherein the hold-down assembly comprises a hold-down support base and a hold-down plate; the pressing plate is movably arranged on the pressing support seat along the second direction, the pressing support seat is movably arranged on the workbench along the first direction, and the pressing support seat is further provided with a butting part which is used for being abutted against the first clamping piece.

7. The welding fixture of claim 6, wherein the press support further comprises support plates disposed on both sides of the positioning assembly, and a connecting plate connected between the support plates; the supporting plate is movably arranged on the workbench along a first direction, the pressing plate is movably arranged on the supporting plate along a second direction, the abutting portion is arranged on the supporting plate, and the connecting plate can abut against the second clamping piece.

8. The welding fixture of claim 6, wherein a first positioning structure is further disposed on the pressure strip, and a second positioning structure is disposed on the carrier seat and cooperates with the first positioning structure.

9. The welding fixture of claim 8, wherein the drive assembly comprises a translation drive and a lift drive; the translation driving device is in driving connection with the pressing support seat, drives the pressing support seat to move along a first direction, and enables the pressing support seat to be abutted against a follow-up bearing in the first clamping piece and a clamping block in the second clamping piece respectively; and the lifting driving device is in driving connection with the pressing plate, drives the pressing plate to move along the second direction, and enables the pressing plate to press the workpiece.

10. The welding jig of claim 9, wherein the lifting drive device is connected to the pressure strip by a drive connection member, the pressure strip is provided with a through hole for receiving the drive connection member, and a gap is provided between the drive connection member and an inner wall of the through hole.

11. The welding jig of claim 10, wherein the driving connection member includes a connection block disposed in the through hole, a gap is left between the connection block and an inner wall of the through hole, and abutting blocks for abutting against the pressing plate are further disposed at upper and lower ends of the connection block.