CN214921567U

CN214921567U - Welding jig

Info

Publication number: CN214921567U
Application number: CN202121665123.9U
Authority: CN
Inventors: 吕俊辉; 邹文强; 皮进勇; 李坤; 黄天林; 黄韬; 刘毅
Original assignee: Lanto Electronic Ltd
Current assignee: Lanto Electronic Ltd; Kunshan Liantao Electronics Co Ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2021-11-30
Anticipated expiration: 2031-07-21

Abstract

The utility model belongs to the technical field of the welding, a welding jig is disclosed. The welding jig comprises a carrying platform and a positioning mechanism, wherein the carrying platform is provided with a loading groove and an operation hole, the loading groove is arranged on one side of the carrying platform and is communicated with the operation hole, the loading groove is configured to load a product to be welded, a part to be welded of the product to be welded in the loading groove extends into the operation hole, and the operation hole is communicated with two opposite sides of the carrying platform; the positioning mechanism is arranged on the carrying platform in a sliding mode and is configured to be loaded with a conductor, and when the positioning mechanism slides to the welding station, the conductor is attached to a part to be welded of a product to be welded. This welding jig can treat that welding product and conductor carry out positive and negative two side welding, need not to treat that the welding product takes off and welds the another side again, has promoted welding efficiency, and the process is simple and convenient moreover, need not to treat welding product and dismouting repeatedly, greatly reduced treat that the solder joint of welding product and conductor receives stress and cracked risk.

Description

Welding jig

Technical Field

The utility model relates to the field of welding technique, especially, relate to a welding jig.

Background

Conductor soldering is a common process in electronic product manufacturing, and during the production process, a pad of a PCBA (printed circuit board) and a conductor are soldered in a laser or thermal welding mode. Due to product requirements, both the front and back sides of the PCBA board of the connector plug need to be welded together with the conductors.

However, the conventional jig structure can only accomplish single-side welding of the connector plug and the conductor, i.e., welding one side first, taking down the product, placing the product upside down and then placing the carrier, and then welding the other side. The single-side welding process is complicated, the UPH (capacity per hour) of production is reduced due to frequent picking, placing and clamping of the product, the labor intensity of workers is increased, welding spots of the product are more easily stressed in the frequent clamping and picking and placing processes, and the risk of breakage is increased.

Therefore, a welding jig is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a welding jig, it can treat that welding product and conductor carry out double-sided welding, need not to treat that welding product takes off and welds the another side again, has promoted welding efficiency, and the process is simple and convenient moreover, need not to treat that welding product relapses the dismouting, greatly reduced treat that the solder joint of welding product and conductor receives stress and cracked risk.

To achieve the purpose, the utility model adopts the following technical proposal:

a welding jig comprising:

the welding device comprises a carrying platform, a welding head and a welding head, wherein the carrying platform is provided with a loading groove and an operating hole, the loading groove is arranged on one side of the carrying platform and is communicated with the operating hole, the loading groove is configured to load a product to be welded, a part to be welded of the product to be welded in the loading groove extends into the operating hole, and the operating hole is communicated with two opposite sides of the carrying platform;

the positioning mechanism is arranged on the carrier in a sliding mode and is configured to be loaded with a conductor, and when the positioning mechanism slides to the welding station, the conductor is attached to a part to be welded of the product to be welded.

Preferably, the carrying platform is rotatably provided with a buckle plate which can abut against and lock the product to be welded in the loading groove.

Preferably, the loading groove is provided with a positioning block in a sliding manner, one side of the positioning block is provided with a first spring, one end of the first spring is abutted against the positioning block, the other end of the first spring is abutted against the carrying platform, and the first spring can drive the positioning block to be abutted against the product to be welded.

Preferably, the locating block is provided with a slide hole, the pinch plate is provided with a rotating shaft, the rotating shaft comprises a plane portion and a protruding portion, the rotating shaft penetrates through the carrying platform and the slide hole, the pinch plate abuts against and locks the product to be welded in the loading groove, the plane portion abuts against the inner wall of the slide hole, and the first spring drives the locating block to abut against the product to be welded.

Preferably, the positioning mechanism comprises a positioning plate and a push rod connected with the positioning plate, the positioning plate is provided with a first through hole, the loading platform is provided with a guide rod along the extending direction of the loading groove, the guide rod penetrates through the first through hole in a sliding manner, two sides of the positioning plate are respectively provided with a wire arranging groove, and the conductor is loaded in the wire arranging groove.

Preferably, the device further comprises a cover plate detachably arranged on two sides of the carrier, the cover plate is provided with elastic pressing claws, and when the cover plate is covered on the carrier, the elastic pressing claws are abutted to the end parts of the operation holes.

Preferably, the cover plate is provided with a second through hole, a first ejector rod penetrates through the second through hole in a movable mode, the carrying platform is provided with a limiting groove, and the first ejector rod can extend into the limiting groove.

Preferably, the lifting mechanism further comprises a limiting mechanism, the limiting mechanism is arranged on the carrier, and the limiting mechanism can drive the first ejector rod to extend into the limiting groove.

Preferably, the limiting mechanism comprises a cam, a fixing plate and a second ejector rod, the cam is rotatably arranged on the carrier, the cam can be abutted against the fixing plate, the fixing plate is connected with the second ejector rod, and the second ejector rod can extend into the second through hole and is abutted against the first ejector rod.

Preferably, the first ejector rod is sleeved with a second spring, the first ejector rod is connected with one end of the second spring, the other end of the second spring is connected with the inner wall of the second through hole, the carrying platform is provided with a fixed block, the fixed block is provided with a third through hole, the second ejector rod penetrates through the third through hole in a sliding mode, the second ejector rod is sleeved with a third spring, the second ejector rod is connected with one end of the third spring, and the other end of the third spring is connected with the inner wall of the third through hole.

The utility model has the advantages that:

the utility model provides a welding jig through setting up the handle hole that runs through the microscope carrier both sides, and loading groove and handle hole intercommunication can weld in the handle hole of microscope carrier both sides. When welding is carried out, a product to be welded is loaded in the loading groove, a part to be welded of the product to be welded extends into the operation hole, then the positioning mechanism slides to the welding station relative to the carrying platform, the conductor loaded on the positioning mechanism is attached to the part to be welded of the product to be welded, and tin spraying and welding can be carried out on the front side and the back side of the product to be welded and the conductor respectively through the operation holes penetrating through the two sides of the carrying platform. This welding jig can treat that welding product and conductor carry out positive and negative two side welding, need not to treat that the welding product takes off and welds the another side again, has promoted welding efficiency, and the process is simple and convenient moreover, need not to treat welding product and dismouting repeatedly, greatly reduced treat that the solder joint of welding product and conductor receives stress and cracked risk.

Drawings

Fig. 1 is a schematic structural view of a welding jig provided by the present invention;

fig. 2 is a schematic structural view of another side of the welding jig provided by the present invention;

FIG. 3 is a schematic structural diagram of the middle stage and the positioning mechanism of the present invention;

fig. 4 is a schematic structural diagram of the loading platform of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

fig. 6 is a side view of the welding jig provided by the present invention;

FIG. 7 is a cross-sectional view A-A of FIG. 6;

FIG. 8 is a schematic view of the structure of the buckle plate of the present invention;

fig. 9 is a schematic structural diagram of the positioning mechanism of the present invention;

fig. 10 is a schematic structural view of the cover plate of the present invention;

FIG. 11 is a cross-sectional view B-B of FIG. 6;

fig. 12 is a schematic structural diagram of the middle limiting mechanism of the present invention.

In the figure:

1. a product to be welded; 2. a conductor;

100. a stage; 101. a loading slot; 102. an operation hole; 103. buckling the plate; 1031. a rotating shaft; 1032. a planar portion; 1033. a boss portion; 104. positioning blocks; 1041. a slide hole; 105. a first spring; 106. a guide bar; 107. a limiting groove; 108. a fixed block; 1081. a third through hole; 200. a positioning mechanism; 201. positioning a plate; 2011. a first through hole; 2012. arranging wire grooves; 202. a push rod; 300. a cover plate; 301. elastic pressing claws; 302. a second through hole; 303. a first ejector rod; 304. a second spring; 400. a limiting mechanism; 401. a cam; 402. a fixing plate; 403. a second ejector rod; 404. and a third spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 5, the present embodiment provides a welding jig, which includes a carrier 100 and a positioning mechanism 200, wherein the carrier 100 is provided with a loading groove 101 and an operation hole 102, the loading groove 101 is provided at one side of the carrier 100, the loading groove 101 is communicated with the operation hole 102, the operation hole 102 is communicated with two opposite sides of the carrier 100, the loading groove 101 is configured to load a product 1 to be welded, a part to be welded of the product 1 to be welded loaded in the loading groove 101 extends into the operation hole 102, and the part to be welded of the product 1 to be welded can be subjected to tin spraying and welding at the front and the back through the operation hole 102; the positioning mechanism 200 is slidably disposed on the carrier 100, the positioning mechanism 200 is configured to load the conductor 2, and when the positioning mechanism 200 slides to the welding station, the conductor 2 is attached to the portion to be welded of the product 1 to be welded.

In the welding jig of the present embodiment, the operation holes 102 penetrating both sides of the stage 100 are provided, and the loading slot 101 communicates with the operation holes 102, so that the welding jig can perform welding in the operation holes 102 on both sides of the stage 100. When welding is performed, the product 1 to be welded is loaded in the loading groove 101, the part to be welded of the product 1 to be welded extends into the operation hole 102, then the positioning mechanism 200 slides to the welding station relative to the carrier 100, the conductor 2 loaded on the positioning mechanism 200 is attached to the part to be welded of the product 1 to be welded, and the product 1 to be welded and the conductor 2 can be respectively subjected to tin spraying and welding on the front side and the back side by penetrating through the operation holes 102 on the two sides of the carrier 100. This welding jig can treat that welding product 1 and conductor 2 carry out the welding of tow sides, need not to treat that welding product 1 takes off and welds the another side again, has promoted welding efficiency, and the process is simple and convenient moreover, need not to treat welding product 1 dismouting repeatedly, greatly reduced treat welding product 1 and conductor 2's solder joint receive stress and cracked risk.

The product to be welded 1 in the present embodiment may be, but is not limited to, a connector plug.

As shown in fig. 6 to 8, the carrier 100 in the present embodiment is rotatably provided with a buckle plate 103, and the buckle plate 103 can abut against and lock the product 1 to be welded in the loading slot 101. Through setting up buckle 103, when the product 1 of treating welding is being treated in the loading, will treat welding product 1 and load to loading groove 101 earlier, then rotate buckle 103, buckle 103 supports and leans on and the locking treats welding product 1 in the loading groove 101, has guaranteed to treat the stability of welding product 1 in welding process, avoids treating that welding product 1 takes place the offset or drops and influence the welding effect, guarantees welding efficiency.

Alternatively, the loading slot 101 is slidably provided with a positioning block 104, one side of the positioning block 104 is provided with a first spring 105, one end of the first spring 105 abuts against the positioning block 104, the other end abuts against the stage 100, and the first spring 105 is configured to drive the positioning block 104 to abut against the product 1 to be welded in the loading slot 101. By arranging the positioning block 104, when the product 1 to be welded is loaded, the positioning block 104 slides in the direction close to the product 1 to be welded until the product 1 to be welded abuts against under the elastic force of the first spring 105, the product 1 to be welded is clamped in the loading groove 101 after the positioning block 104 abuts against, the position of the product 1 to be welded is further fixed, and the stability of the product 1 to be welded in the loading groove 101 is improved.

Furthermore, the positioning block 104 is provided with a slide hole 1041, the buckle 103 is provided with a rotating shaft 1031, the rotating shaft 1031 penetrates through the stage 100 and the slide hole 1041, the rotating shaft 1031 can rotate relative to the stage 100 and the slide hole 1041, the rotating shaft 1031 comprises a plane portion 1032 and a protruding portion 1033, when the buckle 103 abuts against and locks the product 1 to be welded in the loading slot 101, the plane portion 1032 abuts against the inner wall of the slide hole 1041, and the first spring 105 drives the positioning block 104 to abut against the product 1 to be welded. When the welded product 1 to be welded in the loading slot 101 is taken down, the buckle plate 103 is rotated, the buckle plate 103 drives the rotating shaft 1031 to rotate, the rotating shaft 1031 is converted from the abutting of the plane part 1032 and the inner wall of the slide hole 1041 to the abutting of the protruding part 1033 and the inner wall of the slide hole 1041, the rotating shaft 1031 overcomes the elastic force of the first spring 105 through the protruding part 1033 to drive the positioning block 104 to slide towards the direction far away from the product 1 to be welded in the loading slot 101, the positioning block 104 is released from abutting with the product 1 to be welded, and the clamping locking of the product 1 to be welded is released. Through the structure, make buckle 103 and locating piece 104 linkage work, buckle 103 supports and locks treating in the loading groove 101 and welds the product 1 in the time, locating piece 104 supports and treats welding product 1 in the butt under the drive of first spring 105, and when buckle 103 relieved treat welding product 1 support the locking, the bellying 1033 of pivot 1031 overcomes first spring 105's elasticity drive locating piece 104 again and removes treating welding product 1's butt locking, make the operation convenient and fast more, both guarantee to treat welding product 1 and load the effect, the efficiency of loading has been improved again.

As shown in fig. 9, the positioning mechanism 200 in this embodiment includes a positioning plate 201 and a push rod 202 connected to the positioning plate 201, the positioning plate 201 has a first through hole 2011, the carrier 100 is provided with a guide rod 106 along the extending direction of the loading slot 101, the guide rod 106 is slidably inserted into the first through hole 2011, the positioning plate 201 can slide along the guide rod 106 through the first through hole 2011, two sides of the positioning plate 201 have wire-arranging slots 2012 respectively, and the conductors 2 are loaded in the wire-arranging slots 2012. After the product 1 to be welded is loaded, the push rod 202 is pushed, the push rod 202 drives the positioning block 104 to slide along the guide rod 106 until the conductor 2 is attached to the part to be welded of the product 1 to be welded, operation is convenient, the guide rod 106 can ensure the stability of the positioning plate 201 during sliding, and the positioning plate 201 is prevented from being deviated in the sliding process to influence the accurate alignment of the conductor 2 and the part to be welded of the product 1 to be welded.

In this embodiment, the positioning mechanism 200 may also adopt a dovetail groove or a linear guide rail instead of the guiding function of the guiding rod 106, as long as the structure that can ensure the relative position accuracy of the conductor 2 and the portion to be welded of the product to be welded 1 is adopted.

As shown in fig. 10 and 11, the welding jig of the present embodiment further includes a cover plate 300 detachably disposed on both sides of the stage 100, the cover plate 300 is provided with an elastic pressing claw 301, and when the cover plate 300 is covered on the stage 100, the elastic pressing claw 301 abuts against an end portion of the operation hole 102. After the conductor 2 is attached to the part to be welded of the product 1 to be welded, the cover plate 300 is covered on the carrier 100, the elastic pressing claw 301 on the cover plate 300 is abutted to the end part of the operation hole 102, and the part to be welded of the product 1 to be welded is protected by the elastic pressing claw 301, so that the part to be welded of the product 1 to be welded is prevented from being damaged in the welding process, and the quality yield is ensured.

Optionally, the cover plate 300 is provided with a second through hole 302, a first lift rod 303 is movably disposed in the second through hole 302 in a penetrating manner, the carrier 100 is provided with a limiting groove 107, and the first lift rod 303 can extend into the limiting groove 107. Through setting up first ejector pin 303 and the spacing groove 107 that can remove in second through-hole 302, locate microscope carrier 100 back at the apron 300 lid, promote first ejector pin 303 and stretch into the spacing groove 107 in, the position of apron 300 is fixed, and at the in-process of microscope carrier 100 upset, the skew can not take place for apron 300, has guaranteed the stability of apron 300, has guaranteed simultaneously to set up in the position stability of the elastic pressure claw 301 of apron 300.

Preferably, the stage 100 is provided with a plurality of spring plungers protruding from the stage, and the plurality of spring plungers can abut against the cover plate 300 and limit the cover plate 300. When the cover plate 300 covers the stage 100, the spring plungers are respectively abutted against both sides of the cover plate 300 to clamp and limit the cover plate 300, thereby improving the stability of the cover plate 300.

As shown in fig. 10 to 12, the welding jig provided in this embodiment further includes a limiting mechanism 400, the limiting mechanism 400 is disposed on the carrier 100, and the limiting mechanism 400 can drive the first lift pin 303 to extend into the limiting groove 107, so that the operation is convenient, and time and labor are saved. The position limiting mechanisms 400 may be disposed on opposite sides of the stage 100 or on either side of the stage, and preferably, the position limiting mechanisms 400 are disposed on both opposite sides of the stage 100.

Specifically, the stopper mechanism 400 includes a cam 401, a fixing plate 402, and a second lift pin 403, the cam 401 is rotatably disposed on the stage 100, the cam 401 can abut against the fixing plate 402 and push the fixing plate 402 to move in a direction close to the cover plate 300, the fixing plate 402 is connected to the second lift pin 403, and the second lift pin 403 can extend into the second through hole 302 and abut against the first lift pin 303. After the cover plate 300 covers the carrier 100, the cam 401 is rotated, the cam 401 abuts against the fixing plate 402 and pushes the fixing plate 402 to move towards the cover plate 300, the fixing plate 402 drives the second ejector rod 403 to move towards the direction close to the second through hole 302 until the second ejector rod 403 extends into the second through hole 302, meanwhile, the second ejector rod 403 abuts against the first ejector rod 303 and pushes the first ejector rod 303 to extend into the limiting groove 107, the cover plate 300 is fixed by the first ejector rod 303 extending into the limiting groove 107, and meanwhile, the second ejector rod 403 extending into the second through hole 302 can enhance the fixing effect on the cover plate 300.

Optionally, the first lift pin 303 is sleeved with the second spring 304, the first lift pin 303 is connected with one end of the second spring 304, the other end of the second spring 304 is connected with the inner wall of the second through hole 302, the first lift pin 303 can be reset under the driving of the elastic force of the second spring 304, the carrier 100 is provided with the fixed block 108, the fixed block 108 is provided with a third through hole 1081, the second lift pin 403 is slidably inserted into the third through hole 1081, the second lift pin 403 is sleeved with the third spring 404, one end of the second lift pin 403 is connected with one end of the third spring 404, the other end of the third spring 404 is connected with the inner wall of the third through hole 1081, and the second lift pin 403 can be reset under the driving of the elastic force of the third spring 404. When the cover plate 300 covers the carrier 100, the cam 401 is rotated, the cam 401 abuts against the fixed plate 402 and pushes the fixed plate 402 to move towards the cover plate 300, the fixed plate 402 drives the second push rod 403 to move towards the direction close to the second through hole 302 by overcoming the elastic force of the third spring 404 until the second push rod 403 extends into the second through hole 302, and meanwhile, the second push rod 403 abuts against the first push rod 303 and pushes the first push rod 303 to extend into the limit groove 107 by overcoming the elastic force of the second spring 304; when the cover plate 300 needs to be removed, the cam 401 is rotated, the cam 401 is released from contact with the fixing plate 402, the second push rod 403 is returned by the urging force of the third spring 404, the second push rod 403 is disengaged from the second through hole 302, the first push rod 303 is returned by the urging force of the second spring 304, the first push rod 303 is disengaged from the stopper groove 107, and the cover plate 300 is released from being fixed.

As preferred technical scheme, cam 401 is connected with the handle, and rotatory handle, handle drive cam 401 rotate, through setting up the handle, more laborsaving when rotating cam 401.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A welding jig, characterized by, includes:

the welding device comprises a carrier (100), wherein the carrier (100) is provided with a loading groove (101) and an operation hole (102), the loading groove (101) is arranged on one side of the carrier (100), the loading groove (101) is communicated with the operation hole (102), the loading groove (101) is configured to load a product (1) to be welded, a part to be welded of the product (1) to be welded in the loading groove (101) extends into the operation hole (102), and the operation hole (102) is communicated with two opposite sides of the carrier (100);

the positioning mechanism (200) is arranged on the carrier (100) in a sliding mode, the positioning mechanism (200) is configured to load a conductor (2), and when the positioning mechanism (200) slides to a welding station, the conductor (2) is attached to a part to be welded of the product (1) to be welded.

2. Welding jig according to claim 1, characterized in that the carrier (100) is provided with a gusset (103) in rotation, the gusset (103) being able to abut and lock the product to be welded (1) inside the loading slot (101).

3. The welding jig according to claim 2, characterized in that the loading slot (101) is provided with a positioning block (104) in a sliding manner, a first spring (105) is arranged on one side of the positioning block (104), one end of the first spring (105) abuts against the positioning block (104), the other end of the first spring (105) abuts against the carrier (100), and the first spring (105) can drive the positioning block (104) to abut against the product (1) to be welded.

4. The welding jig of claim 3, characterized in that a slide hole (1041) is formed in the positioning block (104), a rotating shaft (1031) is arranged on the buckle plate (103), the rotating shaft (1031) comprises a plane portion (1032) and a protruding portion (1033), the rotating shaft (1031) is arranged on the carrier (100) and the slide hole (1041) in a penetrating manner, when the buckle plate (103) abuts against and locks the product (1) to be welded in the loading groove (101), the plane portion (1032) abuts against the inner wall of the slide hole (1041), and the first spring (105) drives the positioning block (104) to abut against the product (1) to be welded.

5. The welding jig of claim 1, wherein the positioning mechanism (200) comprises a positioning plate (201) and a push rod (202) connected with the positioning plate (201), the positioning plate (201) is provided with a first through hole (2011), the carrier (100) is provided with a guide rod (106) along the extending direction of the loading groove (101), the guide rod (106) is slidably arranged through the first through hole (2011), two sides of the positioning plate (201) are respectively provided with a wire arranging groove (2012), and the conductor (2) is loaded in the wire arranging groove (2012).

6. The welding jig of claim 1, further comprising a cover plate (300) detachably disposed on two sides of the carrier (100), wherein the cover plate (300) is provided with an elastic pressing claw (301), and when the cover plate (300) is covered on the carrier (100), the elastic pressing claw (301) abuts against an end of the operation hole (102).

7. The welding jig of claim 6, wherein the cover plate (300) is provided with a second through hole (302), a first ejector rod (303) is movably arranged in the second through hole (302) in a penetrating manner, the carrier (100) is provided with a limiting groove (107), and the first ejector rod (303) can extend into the limiting groove (107).

8. The welding jig of claim 7, further comprising a limiting mechanism (400), wherein the limiting mechanism (400) is disposed on the carrier (100), and the limiting mechanism (400) can drive the first ejector rod (303) to extend into the limiting groove (107).

9. The welding jig of claim 8, wherein the limiting mechanism (400) comprises a cam (401), a fixing plate (402), and a second ejector rod (403), the cam (401) is rotatably disposed on the stage (100), the cam (401) can abut against the fixing plate (402), the fixing plate (402) is connected with the second ejector rod (403), and the second ejector rod (403) can extend into the second through hole (302) and abut against the first ejector rod (303).

10. The welding jig of claim 9, wherein the first ejector rod (303) is sleeved with a second spring (304), the first ejector rod (303) is connected with one end of the second spring (304), the other end of the second spring (304) is connected with the inner wall of the second through hole (302), the carrier (100) is provided with a fixed block (108), the fixed block (108) is provided with a third through hole (1081), the second ejector rod (403) is slidably arranged in the third through hole (1081), the second ejector rod (403) is sleeved with a third spring (404), the second ejector rod (403) is connected with one end of the third spring (404), and the other end of the third spring (404) is connected with the inner wall of the third through hole (1081).