Back plate welding tool

Abstract

The present application discloses a back plate welding tool, comprising a base plate and a processing platform rotatably connected to the base plate, a fixing part is arranged on the processing platform to fix and install the back plate to be processed, a connecting seat is arranged on the processing platform, a connecting part is arranged on the base plate, the connecting seat and the connecting part are rotatably connected through a rotating shaft, the processing platform can rotate relative to the base plate with the rotating shaft as the center, and the connecting part and the connecting seat can be connected by a locating pin during use to keep the processing platform level; a vertical connecting bolt is arranged at the center of the base plate, the tool is rotatably connected to the welding platform through the connecting bolt, a plurality of rotating wheels are arranged on the base plate to fix the back plate to be processed on the processing platform, and the tool can rotate 360 ​​degrees in the horizontal direction with the connecting bolt as the rotation center. Therefore, after the workpiece is fixed by the tool, the worker can realize multi-angle rotation of the workpiece by rotating the tool to adapt to various welding angles and welding positions. The tool is easy to operate and use, and the overall structure of the tool is simple and the manufacturing cost is low.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical processing equipment, and in particular to a tooling that can fix a back plate during back plate welding and drive the back plate to rotate to different welding angles to facilitate welding operations. Background Art

[0002] When welding parts, the parts will be fixed according to the welding requirements. When welding the back plate of the mine-resistant seat, a fixing device will be used to fix the back plate. The back plate is a rectangular flat plate with four ears with holes on it. In the specific processing, the following fixing devices are generally used to regulate it:

[0003] 1. Chuck: It clamps the ear seat on the workpiece through mechanically or hydraulically driven chuck claws.

[0004] 2. Magnetic suction cup: directly adsorb the back panel through magnetic force.

[0005] 3. Pneumatic / hydraulic clamping device: The system is more complex, requires maintenance, and has a high initial investment cost.

[0006] Although the above-mentioned fixing devices can fix the back plate of the mine-proof seat, the chuck and pneumatic / hydraulic clamping device not only have the problem of high cost of use, but also have the problem of inconvenience for workers to operate. Specifically, after the chuck and pneumatic / hydraulic clamping device clamp the workpiece, the worker needs to walk to the appropriate operating position according to the specific target welding position of the workpiece, and then weld. After the welding of the target welding position is completed, the worker needs to walk to the appropriate operating position according to another target welding position on the workpiece, and then weld. Often, the welding operation of a back plate requires the worker to move back and forth until all welding points are welded. Therefore, although the existing fixing device can fix the back plate, it cannot meet the operating needs of the workers in actual applications, resulting in inconvenience in use. Therefore, it is necessary to propose a new technical solution to solve the problems existing in the prior art. Utility Model Content

[0007] The present application provides a back plate welding tool to solve the problem that the current device for fixing the back plate of a mine-proof seat is inconvenient to use and has a high device cost.

[0008] In order to achieve the above objectives, this application provides the following technical solutions:

[0009] The present application provides a backplate welding tool, comprising a base plate and a processing platform arranged above the base plate; a plurality of rotating wheels are arranged at the edge of the base plate, and a connecting bolt perpendicular to the plate surface of the base plate is installed at the center of the base plate, and the connecting bolt is used to be rotatably connected to the welding platform; a connecting piece is arranged on the base plate, and a connecting seat adapted to the connecting piece is arranged on the processing platform, and the connecting piece and the connecting seat are rotatably connected through a rotating shaft, and mutually communicating positioning holes are formed on the connecting piece and the connecting seat, and the positioning holes are used to insert positioning pins; a fixing piece for mounting a workpiece to be processed is arranged on the surface of the processing platform away from the base plate.

[0010] Further in the above technical scheme, the processing platform is a plate, and a plurality of fixing parts are arranged on the upper surface of the processing platform. The fixing parts include a mounting seat arranged on the processing platform, and a connecting slot matching the ear seat on the workpiece to be processed is opened on the mounting seat. Corresponding positioning holes are arranged on two side walls of the connecting slot that are opposite to each other. The ear seat on the workpiece to be processed is inserted into the connecting slot, and the positioning holes arranged on the side walls of the connecting slot are connected with the through holes on the ear seat to form an installation channel for installing the positioning column.

[0011] Furthermore, the processing platform is a rectangular plate, and a fixing piece is respectively arranged at the four corners of the rectangular plate; the workpiece to be processed is a back plate, and the back plate is a rectangular plate, and ear seats are arranged at the four corners of the rectangular plate, and one ear seat is correspondingly adapted and installed with one fixing piece.

[0012] Furthermore, a connecting seat is respectively arranged on the opposite sides of the processing platform, a rotating mounting groove is formed on the connecting seat, and interconnected mounting holes are arranged on the two opposite side walls of the rotating mounting groove. The connecting piece is installed in the rotating mounting groove, and a through hole connected to the mounting hole is arranged on the connecting piece. The mounting hole and the through hole form an installation channel for installing the rotating shaft.

[0013] Furthermore, interconnected positioning holes are provided on two opposite side walls of the rotating mounting groove, the connecting member is installed in the rotating mounting groove, and the positioning hole on the connecting member is connected to the positioning hole on the rotating mounting groove, and the positioning hole is provided above the mounting hole.

[0014] Furthermore, the bottom plate is a rectangular plate, two extension plates are arranged at intervals on the two long sides of the bottom plate, and a rotating wheel is installed on each extension plate; a connecting piece is arranged on each of the two short sides of the bottom plate, and the connecting piece is a plug-in board.

[0015] Furthermore, a connecting hole is set at the center of the base plate, and a connecting bolt is installed in the connecting hole. A first locking nut, a first washer, a second washer, a second locking nut and a third locking nut are sequentially arranged on the connecting bolt, and the base plate is arranged between the first washer and the second washer.

[0016] Furthermore, a light hole is provided on the welding platform, and the connecting bolt is adapted to be inserted in the light hole. The welding platform is arranged between the second locking nut and the third locking nut, and the connecting bolt can rotate relative to the welding platform.

[0017] Compared with the prior art, this application has at least the following beneficial effects:

[0018] 1. The back plate welding tool provided by the present application includes a base plate and a processing platform rotatably connected to the base plate, a fixing part is arranged on the processing platform to realize the fixed installation of the back plate to be processed, a connecting seat is arranged on the processing platform, and a connecting part is arranged on the base plate, the connecting seat and the connecting part are rotatably connected through a rotating shaft to realize the rotation of the processing platform relative to the base plate in the vertical direction, when the processing platform does not need to rotate relative to the base plate, the connecting part and the connecting seat are connected by a locating pin to limit the rotation; a vertical connecting bolt is installed at the center of the base plate, and the tool is rotatably connected to the welding platform through the connecting bolt, and a plurality of rotating wheels are also arranged on the base plate to fix the back plate to be processed on the processing platform of the tool, and the tool rotates 360° in the horizontal direction with the connecting bolt as the rotation center under the action of the rotating wheel. Therefore, after the workpiece is fixed by the tool, the worker can realize multi-angle rotation of the workpiece by rotating the tool to adapt to various welding angles and welding positions, and the worker does not need to move back and forth, and the tool is easy to operate and use, and the overall structure of the tool is simple and the manufacturing cost is low.

[0019] 2. In the back plate welding tooling provided in the present application, a plurality of fixing parts for fixing the back plate to be processed are arranged on the processing platform. Since the structure of the back plate is a rectangular plate and four ear seats with holes are arranged on it, the present application also has four fixing parts, one ear seat is adapted to be installed with a fixing part, the fixing part includes a mounting seat, a connecting slot is provided on the mounting seat, and the ear seat is adapted to be installed in the connecting slot. The present application uses the holes on the ear seat to fix the workpiece. Specifically, corresponding positioning holes are arranged on two side walls opposite to each other in the connecting slot. The positioning holes and the holes on the ear seat correspond to install the positioning columns. Since the dead weight of the workpiece exerts a certain pressure on the positioning column, the positioning column does not need to cooperate with other locking parts and will not fall out during rotation. Moreover, when replacing the workpiece, only the positioning column needs to be pulled out, so it is convenient to replace, disassemble and use.

[0020] 3. The processing platform of the present application is installed by plugging and connecting the two connecting seats thereon and the two connecting pieces on the base plate, and the connecting seat and the connecting piece are rotatably connected through a rotating shaft. When the processing platform needs to remain horizontal and not rotate relative to the base plate, the connecting seat and the connecting piece are connected by a locating pin to limit the rotation of the processing platform around the rotating shaft to maintain horizontal positioning. Generally, the workpiece is installed when the processing platform remains horizontal. Therefore, when the tool is in use, the locating pin is first inserted to keep the processing platform horizontal, the workpiece ear seat is inserted into the receiving slot of the fixing piece, the locating column is put on to fix the workpiece, and then the worker pulls out the locating pin and rotates the processing platform. The workpiece flips with the processing platform, which is convenient for the worker to weld. When the welding position needs to be changed, the tool can be rotated to rotate around the connecting bolt as the rotation center to achieve 360° rotation of the workpiece in the horizontal direction. The worker does not need to move back and forth during the entire welding process. The workpiece can be rotated to the appropriate position by rotating the tool, which is convenient for welding.

[0021] 4. In the present application, two connecting seats are provided on the processing platform, and two connecting parts are provided on the bottom plate. Positioning pins can be provided on both connecting seats, or only on one of the connecting seats. One positioning pin can achieve the purpose of limiting the rotation of the processing platform and is convenient for operation. Therefore, in the specific use process, it mainly depends on the worker's left and right hand operating habits, and the positioning pin can be inserted into any connecting seat.

[0022] 5. The base plate in the present application is arranged below the processing platform and is a rectangular plate with a rotating wheel arranged on it. When the tooling is installed on the welding platform through connecting bolts, the tooling is in contact with the welding platform through the rotating wheel. There is rolling friction between the rotating wheel and the welding platform. Therefore, the tooling has small rotation resistance and is convenient for rotation operation.

[0023] 6. The base plate and connecting bolts in the present application are fastened together by locking nuts and washers. The connecting bolts are adapted to be inserted into the light holes on the welding platform. During installation, first remove the third locking nut on the connecting bolt, insert the connecting bolt into the light hole, and then reinstall the third locking nut from the bottom of the welding platform to the connecting bolt. The third locking nut does not need to be tightened. The setting of the third locking nut can prevent the overall overturning of the tooling during flipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be understood that the specific shapes and structures shown in the drawings should not usually be regarded as limiting conditions for implementing the present application; for example, based on the technical concepts and exemplary drawings disclosed in the present application, those skilled in the art are able to easily make routine adjustments or further optimizations to the increase / decrease / attribution division, specific shapes, positional relationships, connection methods, and dimensional ratios of certain units (components).

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of the backplane welding tool provided by the present application in an embodiment, in which the processing platform is kept in a horizontal state;

[0026] Figure 2 for Figure 1 The front view structural diagram of the back plate welding tool shown;

[0027] Figure 3 for Figure 1 A schematic diagram of the top view of the back plate welding tooling shown;

[0028] Figure 4 for Figure 1 The side view structural diagram of the back plate welding tool shown;

[0029] Figure 5 for Figure 1 The three-dimensional structural schematic diagram of the back plate welding tooling shown in another viewing angle;

[0030] Figure 6 It is a schematic diagram of the side view structure of the back plate welding tooling provided by the present application after the processing platform is flipped relative to the bottom plate in one embodiment;

[0031] Figure 7 It is a schematic diagram of the front view structure of the back plate welding tooling provided by the present application after the processing platform is flipped relative to the bottom plate in one embodiment.

[0032] Description of reference numerals:

[0033] 1. Base plate; 2. Rotating wheel; 3. Connecting bolt; 4. Connecting piece; 5. Processing platform; 6. Connecting seat; 7. Rotating shaft; 8. Locating pin; 9. Mounting seat; 10. Connecting slot; 11. Locating column; 12. First locking nut; 13. First washer; 14. Second washer; 15. Second locking nut; 16. Third locking nut. DETAILED DESCRIPTION

[0034] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0035] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0036] The terms such as "upper", "lower", "left", "right", "middle", etc. used in this application are usually used to facilitate intuitive understanding by comparing with the accompanying drawings, and are not absolute limitations on the positional relationship in the actual product. Without departing from the technical concept disclosed in this application, changes in these relative positional relationships should also be regarded as the scope of this application.

[0037] When welding the back plate of a mine-proof seat, a clamp or the like is needed to assist in fixing the workpiece to achieve stable clamping of the workpiece. The current device for fixing the back plate of a mine-proof seat can only play a fixing role. Workers move back and forth to find a suitable welding position during welding. Therefore, it is not friendly to the operator, the device is inconvenient to use, and the cost of using the device is high. To this end, the present application provides a back plate welding tool to improve its flexibility of use while ensuring reliable fixation of the workpiece, so that it meets the operating needs of welding workers and reduces the cost of the device.

[0038] See also Figure 1The present application provides a back plate welding tool, including a base plate 1 and a processing platform 5 arranged above the base plate 1 and rotatably connected to the base plate 1, and a fixing part for mounting a workpiece to be processed is arranged on the surface of the processing platform 5 away from the base plate 1. Specifically, a plurality of rotating wheels 2 are provided at the edge of the base plate 1, and a connecting bolt 3 perpendicular to the plate surface of the base plate 1 is installed at the center of the base plate 1, and the connecting bolt 3 is used to be rotatably connected to the welding platform, that is, the tooling is rotatably connected to the welding platform through the connecting bolt 3, and the back plate to be processed is fixed on the processing platform 5 of the tooling, and the tooling can rotate 360° in the horizontal direction with the connecting bolt 3 as the rotation center under the action of the rotating wheel 2; at the same time, a connecting member 4 is provided on the base plate 1, and a connecting seat 6 adapted to the connecting member 4 is provided on the processing platform 5, and the connecting member 4 and the connecting seat 6 are rotatably connected through a rotating shaft 7, and mutually connected positioning holes are formed on the connecting member 4 and the connecting seat 6, and the positioning holes are used to insert positioning pins 8, so that the processing platform 5 can rotate relative to the base plate 1 with the rotating shaft 7 as the rotation center. When the processing platform 5 does not need to rotate relative to the base plate 1, the connecting member 4 and the connecting seat 6 are connected by the positioning pin 8 to limit the rotation. Therefore, after the workpiece is fixed by this tooling, the worker can rotate the workpiece at multiple angles by turning the tooling to adapt to various welding angles and welding positions. The worker does not have to move back and forth. The tooling is easy to operate and use, the overall structure of the tooling is simple, and the production cost is low.

[0039] In one embodiment, the processing platform 5 provided in the present application is a plate, such as a long strip plate, a round plate, etc., as long as it meets the use requirements. In order to adapt to the installation of the back plate to be processed, the present application sets a fixing member for fixing and installing the back plate in combination with the shape of the back plate to be processed. For details, see Figure 3 Four fixing parts are arranged on the upper surface of the processing platform 5, each fixing part includes a mounting seat 9 arranged on the processing platform 5, a connecting slot 10 adapted to the ear seat on the workpiece to be processed is opened on the mounting seat 9, corresponding positioning holes are arranged on the two opposite side walls of the connecting slot 10, the ear seat on the workpiece to be processed is inserted into the connecting slot 10, and the positioning holes arranged on the side walls of the connecting slot 10 are connected with the through holes on the ear seat to form an installation channel for installing the positioning column 11.

[0040] Since the back plate is rectangular in shape, the processing platform 5 in the present application is preferably a rectangular plate, and a fixing piece is respectively provided at the four corners of the rectangular plate, and the ear seats are provided at the four corners of the back plate, and one ear seat is correspondingly adapted and installed with one fixing piece to achieve reliable fixation. Since the dead weight of the workpiece exerts a certain pressure on the positioning column 11, the positioning column 11 does not need to cooperate with other locking pieces and will not fall out when rotating, and when replacing the workpiece, it is only necessary to pull out the positioning column 11, which is convenient for replacement and disassembly.

[0041] In one embodiment, see Figure 1 , 2, a connecting seat 6 is respectively arranged on the opposite sides of the processing platform 5, a rotating mounting groove is arranged on the connecting seat 6, a through mounting hole is arranged on the side wall of the rotating mounting groove, the connecting member 4 is installed in the rotating mounting groove, and the through hole on the connecting member 4 is connected with the mounting hole to form a mounting channel for mounting the rotating shaft 7. In this application, the width of the processing platform 5 is greater than the width of the bottom plate 1. When the processing platform 5 is flipped 45° relative to the bottom plate 1, the surface of the processing platform 5 just abuts against the long side of the bottom plate 1, and the processing platform 5 is flipped in place, such as Figure 6 , 7 Therefore, the present application adopts a concise rotating connection assembly to achieve a reliable rotating connection structure, and the difficulty and cost of tooling manufacturing are low.

[0042] In order to limit the relative rotation between the processing platform 5 and the base plate 1, through positioning holes are also provided on the two opposite side walls of the rotating installation groove, and the positioning holes are arranged above the installation holes. When the connecting member 4 is installed in the rotating installation groove, the positioning holes on the connecting member 4 are connected with the positioning holes on the rotating installation groove to install the positioning pin 8. In the specific use process, the workpiece is installed when the processing platform 5 is kept horizontal, that is, the processing platform 5 must be kept horizontal before installation. When in use, the positioning pin 8 is first inserted to keep the processing platform 5 horizontal, the workpiece ear seat is inserted into the receiving slot 10 of the fixing member, and the positioning column 11 is put on to fix the workpiece. Then the worker pulls out the positioning pin 8 and rotates the processing platform 5. The workpiece flips with the processing platform 5, which is convenient for the worker to weld; when the welding position needs to be changed, the tooling can be rotated so that it rotates with the connecting bolt 3 as the rotation center, so as to realize the 360° rotation of the workpiece in the horizontal direction. The worker does not need to move back and forth during the whole welding process. The workpiece can be rotated to a suitable position by rotating the tooling, which is convenient for welding.

[0043] In one embodiment, the base plate 1 is a rectangular plate, and extension plates are respectively arranged near the four corners of the base plate 1, and a rotating wheel 2 is installed on each extension plate; a connecting member 4 is respectively arranged on the two short sides of the base plate 1, and the connecting member 4 is a connector plate adapted to be plugged into the connecting seat 6.

[0044] In this application, see Figures 2 to 4A connection hole is set at the center of the bottom plate 1, and a connection bolt 3 is installed in the connection hole. The first locking nut 12, the first washer 13, the second washer 14, the second locking nut 15 and the third locking nut 16 are arranged on the connection bolt 3 in sequence. The bottom plate 1 is set between the first washer 13 and the second washer 14, and is connected and fixed with the connection bolt 3 through the first locking nut 12 and the second locking nut 15. When the tool is installed, it is connected to the welding platform through the connection bolt 3. When installing, first remove the third locking nut 16 on the connection bolt 3, insert the connection bolt 3 into the light hole, and then reinstall the third locking nut 16 from the bottom of the welding platform to the connection bolt 3. The third locking nut 16 does not need to be tightened. When the tool is installed on the welding platform through the connection bolt 3, the tool contacts and cooperates with the welding platform through the rotating wheel 2. There is rolling friction between the rotating wheel 2 and the welding platform. Therefore, the tool has a small rotation resistance and is convenient for rotation operation. The setting of the third locking nut 16 can prevent the tool from overturning as a whole when the processing platform 5 is turned over, ensuring the reliability and safety of the structural installation.

[0045] As can be seen from the above, the present application solves the problems that the current back plate is inconvenient to fix during welding and cannot be rotated at multiple angles. Workers have to adapt to the movement according to the welding position of the back plate during welding, which is inconvenient to operate. When the tooling provided by the present application is in use, the back plate to be processed is fixed on the tooling processing platform 5. Under the action of the rotating wheel 2, the tooling rotates 360° in the horizontal direction with the connecting bolt 3 as the rotation center. In addition, the processing platform 5 is rotatably connected through the connecting seat 6, the rotating shaft 7 and the connecting piece 4 on the base plate 1. The processing platform 5 can rotate relative to the base plate 1 with the rotating shaft 7 as the rotation center. When the processing platform 5 does not need to rotate relative to the base plate 1, the connecting piece 4 and the connecting seat 6 are connected by the locating pin 8 to limit the rotation. Therefore, the present tooling can fix the workpiece and drive the workpiece to rotate at multiple angles to adapt to various welding angles. Workers do not need to move, and the operation is convenient.

[0046] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0047] The above is a relatively specific and detailed description of the present application through general description and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not deviate from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the scope of protection of the claims of the present application.

Claims

1. A back plate welding tool, characterized in that: The invention comprises a base plate (1) and a processing platform (5) arranged above the base plate (1); a plurality of rotating wheels (2) are arranged on the edge of the base plate (1); a connecting bolt (3) perpendicular to the plate surface of the base plate (1) is installed at the center of the base plate (1); the connecting bolt (3) is used to be rotatably connected to the welding platform; a connecting member (4) is arranged on the base plate (1); a connecting seat (6) adapted to the connecting member (4) is arranged on the processing platform (5); the connecting member (4) and the connecting seat (6) are rotatably connected via a rotating shaft (7); mutually communicating positioning holes are formed on the connecting member (4) and the positioning holes are used to insert positioning pins (8); a fixing member for mounting a workpiece to be processed is arranged on the surface of the processing platform (5) away from the base plate (1).

2. The back plate welding tool according to claim 1, characterized in that: The processing platform (5) is a plate member, and a plurality of fixing members are arranged on the upper surface of the processing platform (5), wherein the fixing members include a mounting seat (9) arranged on the processing platform (5), and a connecting slot (10) adapted to the ear seat on the workpiece to be processed is opened on the mounting seat (9), and corresponding positioning holes are arranged on two oppositely arranged side walls of the connecting slot (10), and the ear seat on the workpiece to be processed is inserted into the connecting slot (10), and the positioning holes arranged on the side walls of the connecting slot (10) are connected with the through holes on the ear seat to form a mounting channel for mounting a positioning column (11).

3. The back plate welding tool according to claim 2, characterized in that: The processing platform (5) is a rectangular plate, and one of the fixing members is respectively arranged at the four corners of the rectangular plate; the workpiece to be processed is a back plate, and the back plate is a rectangular plate, and ear seats are arranged at the four corners of the rectangular plate, and one ear seat is correspondingly adapted and installed with one of the fixing members.

4. The back plate welding tool according to claim 2 or 3, characterized in that: A connecting seat (6) is respectively arranged on opposite sides of the processing platform (5), a rotating mounting groove is formed on the connecting seat (6), and interconnected mounting holes are arranged on two opposite side walls of the rotating mounting groove. The connecting member (4) is installed in the rotating mounting groove, and a through hole connected to the mounting hole is arranged on the connecting member (4), and the mounting hole and the through hole form an installation channel for installing the rotating shaft (7).

5. The back plate welding tool according to claim 4, characterized in that: The two opposite side walls of the rotating installation groove are also provided with communicating positioning holes, the connecting member (4) is installed in the rotating installation groove, and the positioning hole on the connecting member (4) is communicated with the positioning hole on the rotating installation groove, and the positioning hole is arranged above the mounting hole.

6. The back plate welding tool according to claim 1, characterized in that: The base plate (1) is a rectangular plate, two extension plates are arranged at intervals on the two long sides of the base plate (1), and one of the rotating wheels (2) is installed on each extension plate; a connecting piece (4) is arranged on each of the two short sides of the base plate (1), and the connecting piece (4) is a plug-in board.

7. The back plate welding tool according to claim 6, characterized in that: A connecting hole is provided at the center of the base plate (1), the connecting bolt (3) is installed in the connecting hole, a first locking nut (12), a first washer (13), a second washer (14), a second locking nut (15) and a third locking nut (16) are sequentially provided on the connecting bolt (3), and the base plate (1) is provided between the first washer (13) and the second washer (14).

8. The back plate welding tool according to claim 7, characterized in that: The welding platform is provided with a light hole, the connecting bolt (3) is adapted to be inserted into the light hole, the welding platform is arranged between the second locking nut (15) and the third locking nut (16), and the connecting bolt (3) can rotate relative to the welding platform.

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