Welding jig

Abstract

The utility model provides a welding jig which comprises a clamping module provided with a bottom plate and a cover plate, the bottom plate bears and positions a product to be welded, the cover plate is buckled on the bottom plate to buckle the product, the cover plate is provided with at least one positioning through hole, and the positioning through hole contains a welding part to be welded to the product; the pressing module is provided with a pressing plate and a driving module, the driving module is connected with the pressing plate and drives the pressing plate to be pressed on the clamping module, the pressing plate is pressed on the cover plate and comprises a base plate, a first pressing part and a second pressing part, and the first pressing part and the second pressing part are arranged on the base plate. The first press-fit part abuts against the cover plate to press the product, and the second press-fit part corresponds to the at least one positioning through hole and enables the welding piece to abut against the product. According to the welding jig, the alignment efficiency of the product and the welding piece is improved, and the production cost is reduced.

Description

Technical Field

[0001] The present application relates to a welding jig. Background Art

[0002] Common welding jigs usually use an integral pressure plate and a rotating handle connected to the integral pressure plate to position and fasten the product to be welded and the welded parts to be welded on the product. That is, the product to be welded and the welded parts need to be placed on the integral pressure plate first, and then the pressure plate is fastened by the rotating handle to fix the product and the welded parts. Since the integral pressure plate and the rotating handle are rigidly connected, the fastening of the product is also rigid. After the integral pressure plate is fastened, it also needs to be positioned by setting a positioning groove with a specific structure so that welding can be carried out. This type of welding jig has a complex structure, and after welding, a corresponding jig is required to remove the material to remove the welded product. It is difficult to assemble, the jig cost is high, and the cost of the processing procedure is high. Utility Model Content

[0003] In view of the above, it is necessary to provide a welding fixture with simple structure, convenient assembly and low processing cost.

[0004] A welding jig, comprising:

[0005] A clamping module, comprising a bottom plate and a cover plate, wherein the bottom plate carries and positions the product to be welded, and the cover plate buckles the product onto the bottom plate, and the cover plate is provided with at least one positioning through hole, and the positioning through hole accommodates a welding piece to be welded to the product; and

[0006] A pressing module comprises a pressing plate and a driving module, wherein the pressing plate comprises a substrate and a first pressing portion and a second pressing portion arranged on the substrate, the pressing plate is pressed on the cover plate, the first pressing portion is pressed against the cover plate to press the product, the second pressing portion is arranged corresponding to the at least one positioning through hole, and presses the welding part against the product; the driving module is connected to the pressing plate and drives the pressing plate to be pressed on the clamping module.

[0007] The welding jig provided in the embodiment of the present application can position the product to be welded on the base plate and position the welding part to be welded on the product in the positioning through hole of the cover plate by setting a snap-fit ​​module. By setting the cover plate to buckle on the base plate to buckle the product, the welding part placed in the positioning through hole can be set corresponding to the product, thereby completing the positioning of the product and the welding part. By setting the pressing module to include a first pressing part, the product can be pressed and fixed by pressing the cover plate, and by setting the pressing module to include a second pressing part, the welding part can be directly pressed into a positioning through hole, thereby achieving the fixation of the welding part. By setting a driving module, the position of the pressing plate relative to the snap-fit ​​module can be controlled, thereby achieving fixation and release. The welding jig provided in the embodiment of the present application can directly control whether the product and the welding part are fixed by driving the pressing plate to move. Compared with the rigid rotary handle, the structure is simpler, the assembly process is optimized, and the processing cost is reduced.

[0008] In one embodiment, at least one first positioning pin is provided on a side of the bottom plate facing the cover plate, and the first positioning pin positions the product.

[0009] In one embodiment, at least one second positioning pin is provided on a side of the bottom plate facing the cover plate, and the second positioning pin positions the cover plate.

[0010] In one embodiment, the welding jig further includes a base, and the pressing die set is fixed on the base.

[0011] In one embodiment, a positioning block is disposed on the base, and the positioning block defines a preset position for limiting the movement of the locking module on the surface of the base, and the pressing module presses the locking module positioned at the preset position.

[0012] In one embodiment, the pressing module further includes a fixed bracket, the fixed bracket is fixed on the base, and the driving module is fixed on the fixed bracket to drive the pressing plate to move relative to the base.

[0013] In one embodiment, the first pressing portion includes a first screw, a first nut and a first elastic member. A first through hole is opened on the substrate, and the first screw passes through the first through hole to be threadedly connected with the first nut; the first elastic member is located on one side of the substrate that presses the cover plate, and is sleeved on the first screw.

[0014] In one embodiment, the first elastic member includes a first spring and a first pressing block, the first pressing block is sleeved on one end of the first screw pressing the cover plate, and the first spring is disposed between the first pressing block and the base plate.

[0015] In one embodiment, the second pressing portion includes a second screw, a first nut and a second elastic member, a second through hole is opened on the substrate, and the second screw passes through the second through hole to be threadedly connected with the second nut; the second elastic member is located on the side of the substrate where the welding member is pressed, and is sleeved on the second screw.

[0016] In one embodiment, a welding through hole is further provided on the substrate at a position corresponding to the second pressing portion, and the welding through hole enables the welding part to be exposed relative to the pressing plate when the pressing plate is pressed onto the cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of the welding fixture in the embodiment of the present application.

[0018] Figure 2 It is a schematic diagram of the structure of the product to be welded and the welded parts in the embodiment of the present application.

[0019] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the clamping module of the welding fixture.

[0020] Figure 4 This is a schematic diagram of the process of placing products and welded parts into the locking module in an embodiment of the present application.

[0021] Figure 5 for Figure 1 Schematic diagram of the exploded structure of the pressing die and base of the welding fixture.

[0022] Figure 6 for Figure 5 Schematic diagram of the exploded structure of the pressure plate.

[0023] Figure 7 It is a schematic diagram of the top view structure of the substrate of the pressing plate in the embodiment of the present application.

[0024] Figure 8 Schematic diagram of the alignment relationship between the locking module and the pressing module in the embodiment of the present application.

[0025] Main component symbols

[0026] Welding fixture 100

[0027] Card module 10

[0028] Bottom plate 11

[0029] First positioning pin 111

[0030] Second positioning pin 113

[0031] Positioning slot 115

[0032] Cover 13

[0033] Positioning through hole 131

[0034] Positioning hole 133

[0035] Pressing die set 30

[0036] Platen 31

[0037] Substrate 311

[0038] First through hole 312

[0039] Second through hole 314

[0040] Solder through hole 316

[0041] Connection Zone 313

[0042] Press-fit welding area 315

[0043] The first pressing part 33

[0044] First screw 331

[0045] First nut 333

[0046] The first elastic member 335

[0047] First Spring 3351

[0048] Block 3353

[0049] Second pressing part 35

[0050] Second screw 351

[0051] Second nut 353

[0052] The second elastic member 355

[0053] Driver module 37

[0054] Fixed bracket 39

[0055] Base 50

[0056] Positioning blocks 51, 51a, 51b

[0057] Product A

[0058] Opening A1

[0059] Welding Part B

[0060] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0061] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0062] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0063] In order to further explain the technical means and effects adopted by the present application to achieve the intended purpose, the present application is described in detail below in conjunction with the accompanying drawings and preferred implementation methods.

[0064] See also Figure 1 The welding jig 100 provided in the embodiment of the present application includes a clamping module 10, a pressing module 30 and a base 50. The pressing module 30 is arranged on the base 50 and presses the clamping module 10 on the base 50.

[0065] The clamping module 10 includes a bottom plate 11 and a cover plate 13. The bottom plate 11 carries and positions the product to be welded. The cover plate 13 is buckled on the bottom plate 11 to buckle and position the product. The cover plate 13 is provided with at least one positioning through hole 131, and the positioning through hole 131 accommodates the welded part to be welded to the product. Specifically, the clamping module 10 positions the product to be welded and the welded part, and the pressing module 30 abuts against the clamping module 10 placed on the base 50, thereby fixing the position of the clamping module 10, and then fixing the position of the product and the welded part. When the clamping module 10 is placed on the base 50, the bottom plate 11 is placed toward the base 50, and the cover plate 13 is placed toward the side away from the base 50 and carried on the bottom plate 11, so that the pressing module 30 can press and fix the cover plate 13 and the welded part placed in the positioning through hole 131.

[0066] See also Figure 2 In this embodiment, the number of weldments B to be welded on product A is four, which are respectively distributed at the four corners of product A. Two openings A1 are provided on product A to assist in the positioning of product A. The shape and size of product A can be set according to actual needs, and this application does not limit this. In other embodiments, the number and distribution positions of weldments B to be welded on product A can be set according to actual needs. The number of openings A1 on product A for auxiliary positioning can also be set according to actual needs.

[0067] See also Figure 3, at least one first positioning pin 111 is provided on the bottom plate 11, and the first positioning pin 111 positions the product A. Specifically, the first positioning pin 111 is a columnar protrusion provided on the bottom plate 11, and when the product A is placed on the bottom plate 11, the first positioning pin 111 can pass through the opening A1 on the product A, so that the position of the product A relative to the bottom plate 11 is fixed. In this embodiment, the number of the first positioning pin 111 and the opening A1 are both two, and each opening A1 corresponds to one first positioning pin 111.

[0068] In this embodiment, a positioning groove 115 is further provided on the bottom plate 11, and the positioning groove 115 accommodates at least part of the product A, thereby further fixing the product A placed on the bottom plate 11, and the first positioning pin 111 is arranged on the bottom wall of the positioning groove 115, and together with the side wall of the positioning groove 115, limits the movement of the product A relative to the bottom plate 11. In other embodiments, the first positioning pin 111 can also be arranged on the outside of the positioning groove 115, thereby fixing the part of the product A not accommodated in the positioning groove 115.

[0069] At least one second positioning pin 113 is also provided on the bottom plate 11, and the second positioning pin 113 positions the cover plate 13. Specifically, at least one positioning hole 133 is provided on the cover plate 13, and each positioning hole 133 corresponds to a second positioning pin 113, so that when the cover plate 13 is buckled on the bottom plate 11, the second positioning pin 113 can be inserted into the positioning hole 133, so that the position of the cover plate 13 relative to the bottom plate 11 is fixed. In this embodiment, the number of the second positioning pin 113 and the positioning hole 133 are both two, and in other embodiments, it can also be set to one or more than three, and this application does not limit this.

[0070] See also Figure 4 , the process of placing product A and welding part B into the locking module 10 is specifically as follows: first, product A is placed on the bottom plate 11, so that the first positioning pin 111 and the opening A1 are engaged with each other, so that product A is fixed relative to the bottom plate 11. Then, the cover plate 13 is placed on the bottom plate 11 provided with product A, so that the cover plate 13 buckles product A, and the second positioning pin 113 on the bottom plate 11 passes through the positioning hole 133 of the cover plate 13. At this time, the position of the cover plate 13 is fixed relative to the bottom plate 11, and product A is partially exposed through the positioning through hole 131 opened on the cover plate 13. Finally, the welding part B is placed in the positioning through hole 131, so that the welding part B contacts the surface of the part of product A exposed through the positioning through hole 131, and the position of the welding part B placed in the positioning through hole 131 is limited by the positioning through hole 131, so that it is fixed relative to the cover plate 13, and the positions of the cover plate 13 and product A are both fixed relative to the bottom plate 11, so that the positions of the welding part B and product A can also be relatively fixed.

[0071] See also Figure 5The base 50 is provided with a positioning block 51, which defines a preset position, and the pressing module 30 presses and positions the clamping module 10 at the preset position. Specifically, the positioning block 51 includes a positioning block 51a and a positioning block 51b arranged in two directions perpendicular to each other, and the positioning block 51a and the positioning block 51b are combined into an L shape, thereby limiting the movement of the clamping module 10 on the surface of the base 50, thereby realizing the positioning of the clamping module 10.

[0072] The pressing module 30 includes a pressing plate 31, a driving module 37 and a fixing bracket 39. The fixing bracket 39 is disposed on the base 50, the driving module 37 is fixed on the fixing bracket 39, and the pressing plate 31 is connected to the driving module 37. By setting the position of the fixing bracket 39 relative to the positioning block 51, the pressing plate 31 can be set corresponding to the preset position, thereby corresponding to the clamping module 10 placed at the preset position.

[0073] The driving module 37 is connected to the pressing plate 31, and drives the pressing plate 31 to move relative to the clamping module 10, thereby clamping and fixing the clamping module 10. The driving module 37 can be a cylinder, one end of which is fixed to the fixing bracket 39, and the other end is connected to the pressing plate 31, thereby driving the pressing plate 31 to move. In other embodiments, the driving module 37 can also be a motor or other driving device, which is not limited in the present application.

[0074] After the product A and the weldment B are placed in the clamping module 10, the clamping module 10 can be placed in a preset position on the base 50 manually or by a separately provided transfer device, and the driving module 37 is controlled to drive the pressing plate 31 to move toward the clamping module 10 for pressing.

[0075] See also Figure 6 The pressing plate 31 includes a substrate 311 and a first pressing portion 33 and a second pressing portion 35 arranged on the substrate 311. The first pressing portion 33 presses against the cover plate 13 to press and fix the product. The second pressing portion 35 is arranged corresponding to at least one positioning through hole 131 to press the welding part placed in the positioning through hole 131 against the product.

[0076] The first pressing part 33 includes a first screw 331, a first nut 333 and a first elastic member 335. The substrate 311 is provided with a first through hole 312. The first screw 331 passes through the first through hole 312 to be screwed with the first nut 333. The first elastic member 335 is disposed on the substrate 311 to press one side of the cover plate 13 and is sleeved on the first screw 331. Specifically, in this embodiment, the head of the first screw 331 faces the side of the press-fit cover plate 13, and the tail of the first screw 331 passes through the substrate 311 via the first through hole 312 to be screwed with the first nut 333 disposed on the other side of the substrate 311.

[0077] The first elastic member 335 includes a first spring 3351 and a first pressing block 3353. The first pressing block 3353 is sleeved on the first screw 331 to press one end of the cover plate 13. The first spring 3351 is disposed between the first pressing block 3353 and the base plate 311. Specifically, in this embodiment, the first pressing block 3353 is sleeved on the head of the first screw 331 to abut against the cover plate 13 when the first pressing portion 33 is pressed on the cover plate 13. The first spring 3351 is disposed between the first pressing block 3353 and the base plate 311, and the two ends of the first spring 3351 abut against the first pressing block 3353 and the base plate 311 respectively. When the driving module 37 drives the pressing plate 31 to move toward the cover plate 13, and the first pressing portion 33 abuts against the cover plate 13, the first pressing block 3353 contacts the cover plate 13, and generates a force from the first pressing block 3353 toward the substrate 311, thereby driving the first screw 331 to move toward the substrate 311 to squeeze the first spring 3351. The first spring 3351 contracts after receiving the force generated by the first pressing block 3353, and generates an elastic force to block the first pressing block 3353. The welding jig 100 provided in the embodiment of the present application, by providing a first pressing portion 33 with a first elastic member 335 on the pressing plate 31 of the pressing module 30, can achieve elastic contact with the cover plate 13 when the first pressing portion 33 presses the cover plate 13, thereby avoiding damage that is easily caused by hard contact.

[0078] In other embodiments, the first pressing portion 33 can also be configured such that the first nut 333 is located on one side of the substrate 311 to press the cover plate 13, the first screw 331 passes through the substrate 311 via the first through hole 312 from the other side of the substrate 311 to be screwed with the first nut 333, the first pressing block 3353 is sleeved on the first nut 333, and the first spring 3351 is arranged between the first pressing block 3353 and the substrate 311.

[0079] In other embodiments, the first elastic member 335 may also only include the first pressing block 3353 , the first pressing block 3353 abuts against the substrate 311 , and the first pressing block 3353 is made of elastic material.

[0080] The second pressing part 35 includes a second screw 351, a second nut 353 and a second elastic member 355. The substrate 311 is provided with a second through hole 314. The second screw 351 passes through the second through hole 314 to be screwed with the second nut 353. The second elastic member 355 is located at one end of the substrate 311 pressing the welding member B and is sleeved on the second screw 351. Specifically, in this embodiment, the head of the second screw 351 faces the end of the substrate 311 away from the welding member B, the tail of the second screw 351 passes through the substrate 311 through the second through hole 314 to be screwed with the second nut 353 on the other side of the substrate 311, and the tail end of the second screw 351 passes through the second nut 353 to abut against the welding member B. In other embodiments, the tail end of the second screw 351 can also be screwed into the second nut 353 so that the second nut 353 abuts against the welding member B, and this application does not limit this.

[0081] In this embodiment, the second elastic member 355 only includes a spring, one end of the second elastic member 355 abuts against the second nut 353, and the other end of the second elastic member 355 abuts against the substrate 311. When the driving module 37 drives the pressing plate 31 to move toward the cover plate 13, and the second pressing portion 35 abuts against the welding piece B placed in the positioning through hole 131, the tail end of the second screw 351 contacts the welding piece B, and generates a force from the welding piece B toward the substrate 311, so that the second screw 351 drives the second nut 353 to move toward the substrate 311 to squeeze the second elastic member 355. The second elastic member 355 shrinks after being squeezed by the second nut 353, and generates an elastic force to block the movement of the second nut 353. The welding jig 100 provided in the embodiment of the present application, by providing the second pressing portion 35 with the second elastic member 355 on the pressing plate 31 of the pressing module 30, can achieve elastic contact with the welding piece B when the second pressing portion 35 presses the welding piece B, thereby avoiding damage that is easily caused by hard contact.

[0082] In other embodiments, the second pressing portion 35 can also be configured such that the head of the second screw 351 is located on one side of the pressing welding piece B of the substrate 311, and passes through the substrate 311 via the second through hole 314 to be screwed with the second nut 353 located on the other side of the substrate 311. The second elastic member 355 is disposed between the head of the second screw 351 and the substrate 311 to respectively abut the second screw 351 and the substrate 311.

[0083] The welding jig 100 provided in the embodiment of the present application can also offset the height error between the cover plate 13 and the welding part B by setting the first pressing part 33 to include a first elastic member 335 and the second pressing part 35 to include a second elastic member 355, thereby ensuring that the pressing plate 31 can press the cover plate 13 and the welding part B at the same time, thereby improving the stability of the pressing.

[0084] See also Figure 7A welding through hole 316 is also provided on the substrate 311 at a position corresponding to the second pressing portion 35. The welding through hole 316 makes the welding part B exposed relative to the pressing plate 31 when the pressing plate 31 is pressed on the cover plate 13. Specifically, the substrate 311 can be divided into a connection area 313 and a pressing and welding area 315. The connection area 313 is arranged on one side of the pressing and welding area 315 to be connected with the driving module 37. The pressing and welding area 315 presses the clamping module 10 and the welding part B, and the pressed welding part B is partially exposed relative to the pressing plate 31 through the welding through hole 316, so that light can be irradiated from the side of the pressing plate 31 away from the clamping module 10 through the welding through hole 316 to the welding part B, and then the welding part B can be welded to the product A by laser welding.

[0085] See also Figure 8 In this embodiment, the welding piece B is an L-shaped structure with a single bending angle. When the pressing plate 31 presses the welding piece B placed in the positioning through hole 131, the second pressing portion 35 abuts against the bending part of the welding piece B. One welding piece B is correspondingly provided with two welding through holes 316, and each welding through hole 316 corresponds to one end of the welding piece B extending from the bending part.

[0086] When the welding jig 100 is used to weld the product A and the weldment B, the product A and the weldment B are first fixed by the clamping module 10, and then the clamping module 10 is placed at a preset position of the base 50. After the pressing plate 31 is driven to clamp the cover plate 13 and the weldment B, multiple laser beams L can be provided on the side of the pressing plate 31 away from the clamping module 10, and each laser beam L passes through a welding through hole 316 and irradiates the weldment B, thereby welding the weldment B to the product A by radium welding. The process of welding the weldment B to the product A by radium welding is specifically to irradiate the weldment B with the laser L, so that the connection between the weldment B and the product A generates a high temperature and then melts, and solidifies after cooling, thereby completing the welding.

[0087] In this embodiment, by setting the second pressing part 35 to press against the bend of the welding part B, the welding part B can be pressed against the product A more stably. By opening two welding through holes 316 corresponding to each welding part B on the substrate 311, each welding part B can be welded to the product A through two welding points, thereby improving the stability of welding. In other embodiments, the position where the second pressing part 35 presses against the welding part B and the number of welding through holes 316 corresponding to the welding part B can also be set according to the specific structure of the welding part B, and this application does not limit this.

[0088] After the welding process is completed, the clamping module 10 can be removed from the base 50 by controlling the driving module 37 to lift the pressing plate 31, and the cover plate 13 and the bottom plate 11 can be separated manually or by a separately provided clamping device to obtain the welded product A.

[0089] The welding fixture 100 provided in the embodiment of the present application can position the product A and the welding part B respectively through the bottom plate 11 and the cover plate 13 by setting the clamping module 10, so as to realize the positioning of the welding part B on the product A. By setting the pressing module 30 to include the first pressing part 33, the product A can be pressed indirectly by pressing the cover plate 13, and by setting the pressing module 30 to include the second pressing part 35, the welding part B set in the positioning through hole 131 of the cover plate 13 can be directly pressed, so as to press and fix the welding part B on the product A. By setting the first pressing part 33 to include the first elastic part 335 and the second pressing part 35 to include the second elastic part 355, the flexible pressing of the cover plate 13 and the welding part B can be realized, so as to avoid the damage caused by the hard pressing. By setting the base plate 311 of the pressing plate 31 to open a welding through hole 316 corresponding to the position of each welding part B, the laser can be irradiated to the welding part B through the welding through hole 316, so as to radium weld the welding part B to the product A. By setting the driving module 37, the pressing plate 31 can be controlled to move relative to the clamping module 10, so as to press or cancel the pressing. The welding fixture 100 provided in the embodiment of the present application has a simple structure and a simple operation process, which is conducive to optimizing the welding process and reducing the processing cost.

[0090] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of protection claimed in the present application.

Claims

1. A welding jig, characterized in that: include: The clamping module comprises a bottom plate and a cover plate, wherein the bottom plate carries and positions the product to be welded, and the cover plate buckles the product onto the bottom plate, and the cover plate is provided with at least one positioning through hole, and the positioning through hole accommodates the welding piece to be welded to the product; as well as A pressing module, which is connected to the locking module and includes a pressing plate and a driving module, wherein the pressing plate includes a substrate and a first pressing portion and a second pressing portion arranged on the substrate, the pressing plate is pressed on the cover plate, the first pressing portion is pressed against the cover plate to press the product, the second pressing portion is arranged corresponding to the at least one positioning through hole, and presses the welding part against the product; the driving module is connected to the pressing plate and drives the pressing plate to be pressed on the locking module.

2. The welding jig according to claim 1, characterized in that: At least one first positioning pin is disposed on a side of the bottom plate facing the cover plate, and the first positioning pin positions the product.

3. The welding jig according to claim 1, characterized in that: At least one second positioning pin is disposed on a side of the bottom plate facing the cover plate, and the second positioning pin positions the cover plate.

4. The welding jig according to claim 1, characterized in that: The welding jig also includes a base, and the pressing die set is fixed on the base.

5. The welding jig according to claim 4, characterized in that: A positioning block is disposed on the base, and the positioning block defines a preset position for limiting the movement of the clamping module on the surface of the base, and the pressing module presses the clamping module positioned at the preset position.

6. The welding jig according to claim 4, characterized in that: The pressing module also includes a fixed bracket, which is fixed on the base. The driving module is fixed on the fixed bracket to drive the pressing plate to move relative to the base.

7. The welding jig according to claim 1, characterized in that: The first pressing part includes a first screw, a first nut and a first elastic member. A first through hole is opened on the substrate, and the first screw passes through the first through hole to be screwed with the first nut; the first elastic member is located on one side of the substrate that presses the cover plate and is sleeved on the first screw.

8. The welding jig according to claim 7, characterized in that: The first elastic member includes a first spring and a first pressing block. The first pressing block is sleeved on one end of the first screw that presses the cover plate. The first spring is arranged between the first pressing block and the base plate.

9. The welding jig according to claim 1, characterized in that: The second pressing part includes a second screw, a second nut and a second elastic member. A second through hole is opened on the substrate, and the second screw passes through the second through hole to be threadedly connected with the second nut; the second elastic member is located on one side of the substrate where the welding part is pressed, and is sleeved on the second screw.

10. The welding jig according to claim 1, characterized in that: A welding through hole is also provided on the base plate at a position corresponding to the second pressing portion, and the welding through hole enables the welding part to be exposed relative to the pressing plate when the pressing plate is pressed on the cover plate.

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