Battery tray arc welding deformation control device and use method thereof

Abstract

The present invention relates to a battery tray arc welding deformation control device, which includes a placement frame and a load-bearing frame. The load-bearing frame and the placement frame are connected by a load-bearing rod. The load-bearing frame and the placement frame are arranged opposite each other. The load-bearing frame is provided with a first limiter corresponding to a plurality of reinforcing beams. The placement frame is slidably connected to a plurality of placement plates. The placement frame is provided with a plurality of positioning cylinders. The plurality of positioning cylinders are evenly placed on the placement frame. The load-bearing frame is provided with a plurality of first tightening assemblies for tightening aluminum alloy side frames. The present application has the effect of improving the quality of the battery tray after welding.

Description

Technical Field

[0001] The present invention relates to the technical field of battery tray welding, and in particular to a battery tray arc welding deformation control device and a use method thereof. Background Art

[0002] The development of the new energy industry requires energy storage batteries. The battery tray is the core part of the energy storage battery. The battery tray is usually welded from multiple pieces of aluminum alloy. When welding the battery pack, the aluminum alloy base plate is usually placed on the placement rack, and then the aluminum alloy side frame is spliced ​​with the aluminum alloy base plate. Multiple reinforcing beams are placed on the aluminum alloy base plate. The reinforcing beams are also made of aluminum alloy. Then, an arc welding gun is used to weld the joints between the aluminum alloy base plate and the aluminum alloy side frame, and the joints between the aluminum alloy base plate and the reinforcing beams.

[0003] When welding the aluminum alloy side frames in the length direction of the battery tray, the operator usually places the aluminum alloy side frames on a placement rack, splices the aluminum alloy side frames with the aluminum alloy base plate, and then welds them. During the welding process, due to the high welding temperature, the workpiece will be deformed after being heated, and a gap will be generated between the aluminum alloy base plate and the aluminum alloy side frames due to the deformation, thereby reducing the quality of the finally welded battery tray. Summary of the Invention

[0004] In order to improve the quality of the welded battery tray, the present application provides a battery tray arc welding deformation control device.

[0005] In the first aspect, the present application provides a battery tray arc welding deformation control device that adopts the following technical solutions:

[0006] A battery tray arc welding deformation control device includes a placement frame and a load-bearing frame, the load-bearing frame is connected to the placement frame through a load-bearing rod, the load-bearing frame is arranged opposite to the placement frame, the load-bearing frame is provided with a first limit member arranged in a one-to-one correspondence with multiple reinforcing beams, the placement frame is slidably connected to multiple placement plates, the placement frame is provided with multiple positioning cylinders, and the load-bearing frame is provided with multiple first tightening components for tightening the aluminum alloy side frame.

[0007] By adopting the above technical solution, when in use, the operator places the aluminum alloy base plate on multiple placement plates, and the multiple placement plates jointly support the aluminum alloy base plate, and then moves the aluminum alloy base plate between the load-bearing frame and the placement frame, and then places the reinforcing beam on the aluminum alloy base plate, and then starts multiple positioning cylinders at the same time, and the multiple positioning cylinders move together in the direction of the first limit member until the first limit member limits the reinforcing beam. At this time, the aluminum alloy base plate and the reinforcing beam are both limited, and then the aluminum alloy side frame is spliced ​​with the two sides of the aluminum alloy base plate, and then the two are tightened by the first clamping component, and then the splicing of the aluminum alloy base plate and the aluminum alloy side frame is welded, and the contact points of the aluminum alloy base plate and the reinforcing beam are welded. Since the aluminum alloy base plate, the aluminum alloy side frame and the reinforcing beam are all limited, the deformation after heating will not cause them to move, thereby improving the quality of the welded battery tray.

[0008] Optionally, a slide is provided on the placement plate, and the slide includes a plurality of rollers arranged along the length direction of the placement plate. The slide is arranged along the width direction of the placement rack. The placement rack is provided with a pushing cylinder arranged one-to-one corresponding to the plurality of placement plates, and the piston rod of the pushing cylinder is connected to the placement plate.

[0009] By adopting the above technical solution, when in use, the operator places the aluminum alloy base plate on the slide, pushes the aluminum alloy base plate to make it slide with the roller, reduces friction, saves manpower, and then starts the pushing cylinder, which drives the placement plate and the slide to move toward the first limit piece, thereby achieving preliminary limiting of the aluminum alloy base plate.

[0010] Optionally, the first limiting member includes a limiting frame and two clamping claws, the limiting frame is arranged on the load-bearing frame, the two clamping claws are arranged at both ends of the limiting frame, and a clamping groove is opened on the clamping claw, and the clamping groove is tightly pressed against the corresponding reinforcing beam.

[0011] By adopting the above technical solution, when the reinforcing beam is inserted into the clamping groove, the clamping claw limits the reinforcing beam, reducing the possibility of the reinforcing beam sliding. At the same time, the pushing cylinder cooperates with the clamping claw to initially press the aluminum alloy base plate against the load-bearing frame to achieve limiting.

[0012] Optionally, the first clamping assembly includes a limiting cylinder, a slide rail, a mounting plate, a pulling plate, a first push plate and a second push plate, the mounting plate is arranged on the load-bearing frame, the limiting cylinder is arranged on the mounting plate, the piston rod of the limiting cylinder passes through the mounting plate and is connected to the pulling plate, the first push plate and the second push plate are both coaxially rotatably connected to the pulling plate, the slide rail is arranged on the mounting plate, and a clamping frame for clamping the aluminum alloy side frame is slidably connected to the slide rail, the end of the first push plate away from the pulling plate is rotatably connected to the mounting plate, and the end of the second push plate away from the pulling plate is rotatably connected to one end of the clamping frame.

[0013] By adopting the above technical solution, when in use, the operator starts the limit cylinder, the piston rod of the limit cylinder drives the pulling plate to move, and the pulling plate drives the first push plate and the second push plate to move. Under the guidance of the slide rail, the second push plate pushes the clamping frame toward the aluminum alloy side frame and presses the aluminum alloy side frame against the side wall of the aluminum alloy bottom plate. By setting the first push plate and the second push plate, the clamping frame is always subjected to a force parallel to the slide rail, reducing the possibility of the limit frame getting stuck during movement.

[0014] Optionally, the load-bearing frame is provided with a force-bearing plate arranged in one-to-one correspondence with the plurality of first pressing assemblies, and the force-bearing plate is provided with a first force-bearing block, which is in contact with the side wall of the aluminum alloy side frame facing away from the limiting frame.

[0015] By adopting the above technical solution, when the aluminum alloy side frame is pressed tightly, the first force-bearing block is also subjected to the pressing force, thereby reducing the possibility of deformation of the aluminum alloy side frame due to excessive force on one side.

[0016] Optionally, a positioner is further included, one end of the load-bearing frame is connected to the driving shaft of the positioner, and the other end is connected to the driven shaft of the positioner.

[0017] By adopting the above technical solution, when in use, the operator starts the positioner, and the positioner drives the placement frame and the load-bearing frame to rotate in the opposite direction, so that the opening of the battery tray is upward, which is convenient for welding the reinforcing beam inside the battery tray, so that the weld is located inside the battery tray, and the welded product is more beautiful.

[0018] Optionally, a door-type frame is provided on the mounting plate, and a positioning block is detachably connected to the door-type frame. When the limit frame contacts the aluminum alloy side frame, the first push plate and the second push plate are both in a horizontal state, and the positioning block simultaneously contacts the common connection between the pull rod, the first push plate and the second push plate.

[0019] By adopting the above technical solution, when the pulling plate moves upward, the connecting ends of the first push plate and the second push plate and the pulling plate all move upward until they contact the bottom end of the positioning block. At this time, the first push plate and the second push plate are in a horizontal position, which reduces the possibility that the pulling plate moves too far, causing the second push plate to pull the clamping frame back without clamping the aluminum alloy side frame.

[0020] In a second aspect, the present application provides a method for using a battery tray arc welding deformation control device, comprising the following steps:

[0021] S1: placing the aluminum alloy base plate on the plurality of slideways and pushing the aluminum alloy base plate;

[0022] S2: starting the pushing cylinder, and when the reinforcing beam is inserted into the corresponding clamping groove, closing the pushing cylinder;

[0023] S3: Simultaneously start the plurality of positioning cylinders;

[0024] S4: Start the position shifting machine so that the slide rail is positioned upward, and splice the aluminum alloy side frame and the aluminum alloy bottom plate, and then start the limit cylinder;

[0025] S5: The positioner is started again so that the opening of the battery tray is facing upward, and then two welding robots are used to perform welding simultaneously from both sides of the positioner.

[0026] By adopting the above technical solution, the aluminum alloy base plate is placed on the roller, and the aluminum alloy base plate is pushed to make it slide and cooperate with the roller, and then the reinforcing beam is placed on the aluminum alloy base plate, and the aluminum alloy base plate and the reinforcing beam are moved together toward the clamping groove by pushing the cylinder until the reinforcing beam is inserted into the clamping groove to achieve preliminary limit, and then multiple positioning cylinders are started at the same time, and multiple positioning cylinders are pressed against the aluminum alloy base plate at the same time. At this time, the clamping claws limit the reinforcing beam, and then the positioner is started to set the reinforcing beam upward, and the opening of the battery tray is also set upward, and then the aluminum alloy side frame is spliced ​​with the aluminum alloy base plate, so that The gap to be welded faces upwards, and then the operator starts the limiting cylinder. The piston rod of the limiting cylinder drives the pulling plate to move, and the pulling plate drives the first push plate and the second push plate to move. Under the guidance of the slide rail, the second push plate pushes the clamping frame toward the aluminum alloy side frame, and presses the aluminum alloy side frame against the side wall of the aluminum alloy bottom plate. Finally, the welding robots on both sides of the positioner weld simultaneously, which can offset the deformation to the maximum extent. Since the aluminum alloy bottom plate, aluminum alloy side frame and reinforcing beam are all limited, the deformation after heating will not cause them to move, thereby improving the quality of the welded battery tray.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The present application places the aluminum alloy base plate on the multiple placement plates by setting a first limiting member, a placement plate, multiple positioning cylinders, and a first tightening assembly. The multiple placement plates jointly support the aluminum alloy base plate, and then the aluminum alloy base plate is moved between the load-bearing frame and the placement frame. Then, the reinforcing beam is placed on the aluminum alloy base plate, and then the multiple positioning cylinders are started at the same time. The multiple positioning cylinders move together toward the direction of the first limiting member until the first limiting member limits the reinforcing beam. At this time, the aluminum alloy base plate and the reinforcing beam are both limited. Then, the aluminum alloy side frame is spliced ​​with both sides of the aluminum alloy base plate, and then the two are tightened by the first tightening assembly. Then, the splicing of the aluminum alloy base plate and the aluminum alloy side frame is welded, and the contact points of the aluminum alloy base plate and the reinforcing beam are welded. Since the aluminum alloy base plate, the aluminum alloy side frame and the reinforcing beam are all limited, the deformation after heating will not cause them to move, thereby improving the quality of the welded battery tray.

[0029] 2. The present application sets a limit cylinder, a slide rail, a mounting plate, a pulling plate, a first push plate and a second push plate, starts the limit cylinder, and the piston rod of the limit cylinder drives the pulling plate to move, and the pulling plate drives the first push plate and the second push plate to move. Under the guidance of the slide rail, the second push plate pushes the clamping frame toward the aluminum alloy side frame and presses the aluminum alloy side frame against the side wall of the aluminum alloy bottom plate. By setting the first push plate and the second push plate, the clamping frame is always subjected to a force parallel to the slide rail, reducing the possibility of the limit frame getting stuck during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of this application.

[0031] Figure 2 Yes Figure 1 Enlarged view of part A.

[0032] Figure 3 Yes Figure 1 Magnified view of part B.

[0033] Figure 4 It is a schematic structural diagram of the horizontal plate and the vertical plate in the embodiment of the present application.

[0034] Figure 5 Yes Figure 4 Magnified view of part C.

[0035] Figure 6 Yes Figure 1 Magnified view of part D.

[0036] Figure 7 It is a schematic diagram of the structure of the limiting cylinder, slider, force plate and first force block in the embodiment of the present application.

[0037] Explanation of the accompanying symbols: 1. Placement frame; 2. Load-bearing frame; 3. Load-bearing rod; 4. Connecting plate; 5. Active shaft; 6. Driven shaft; 7. Pushing cylinder; 8. Placement plate; 9. Slide; 10. Roller; 11. Positioning cylinder; 12. Horizontal plate; 13. Vertical plate; 14. Snap claw; 15. Snap groove; 16. Limiting cylinder; 17. Slide rail; 18. Mounting plate; 19. Pulling plate; 20. First push plate; 21. Second push plate; 22. Sliding plate; 23. Pressing plate; 24. Slider; 25. Reinforcing beam; 27. Block; 28. Force plate; 29. ​​First force block; 30. Door frame; 31. Positioning block; 32. Aluminum alloy bottom plate; 33. Aluminum alloy side frame; 34. Positioning block. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-7 This application is described in further detail.

[0039] The embodiment of the present application discloses a battery tray arc welding deformation control device. Figure 1 、 Figure 2 and Figure 3 The battery pallet arc welding deformation control device includes a positioner, a placement frame 1 and a load-bearing frame 2. The two ends of the load-bearing frame 2 are connected to the placement frame 1 through a load-bearing rod 3. The load-bearing frame 2 is arranged above and below the placement frame 1. Both ends of the load-bearing frame 2 are connected to the positioner through a connecting plate 4. One connecting plate 4 is connected to the active shaft 5 of the positioner, and the other connecting plate 4 is connected to the driven shaft 6 of the positioner.

[0040] Reference Figure 1 、 Figure 2 and Figure 3 Two pushing cylinders 7 are provided on the placement rack 1. The two pushing cylinders 7 are located on the center line of the placement rack 1. The piston rods of the pushing cylinders 7 are connected to a placement plate 8. The placement plate 8 is arranged along the width direction of the placement rack 1. A slide 9 is provided on the placement plate 8. The slide 9 includes a plurality of rollers 10 arranged along the length direction of the placement plate 8. The plurality of rollers 10 are all rotatably connected to the placement plate 8.

[0041] Reference Figure 1 、 Figure 4 and Figure 5The placement frame 1 is provided with a plurality of positioning cylinders 11, which are divided into three groups. Each group of positioning cylinders 11 is arranged at intervals, and the three groups of positioning cylinders 11 are evenly distributed on the placement frame 1. A positioning block 34 is connected to the piston rod of the positioning cylinder 11, and a first limiting member corresponding to a plurality of reinforcing beams 25 is provided on the load-bearing frame 2. The first limiting member is arranged opposite to the pushing cylinder 7. The first limiting member includes a limiting frame and two clamping claws 14. The limiting frame includes a horizontal plate 12 and a vertical plate 13. The vertical plate 13 is connected to the load-bearing frame 2. The horizontal plate 12 is connected to the end of the vertical plate 13 away from the load-bearing frame 2. A clamping claw 14 is connected to each end of the horizontal plate 12. The clamping claw 14 is provided with a clamping groove 15 for inserting the reinforcing beam 25. The clamping groove 15 is connected to the two ends of the clamping claw 14. When the reinforcing beam 25 is inserted, the clamping groove 15 fits and presses against the corresponding side wall of the reinforcing beam 25.

[0042] Reference Figure 1 、 Figure 6 and Figure 7 The load-bearing frame 2 is provided with a plurality of first tightening components for tightening the aluminum alloy side frame 33. The first tightening components include a limit cylinder 16, a slide rail 17, a mounting plate 18, a pulling plate 19, a first push plate 20 and a second push plate 21. The mounting plate 18 is connected to the load-bearing frame 2 and is located at the edge of the load-bearing frame 2. The two adjacent mounting plates 18 are spaced apart. The limit cylinder 16 is vertically arranged on the mounting plate 18. The piston rod of the limit cylinder 16 passes through the mounting plate 18 and is connected to the pulling plate 19. The pulling plate 19 is vertically arranged.

[0043] Reference Figure 1 、 Figure 6 and Figure 7 The first push plate 20 and the second push plate 21 are both coaxially connected to the pulling plate 19, the slide rail 17 is connected to the mounting plate 18, the length direction of the slide rail 17 is perpendicular to the length direction of the load-bearing frame 2, and the slide rail 17 is slidably connected with a clamping frame for clamping the aluminum alloy side frame 33. The clamping frame includes a sliding plate 22, a pressing plate 23 and a slider 24. The pressing plate 23 is fixedly connected to the sliding plate 22, and the slider 24 is fixedly connected to the bottom of the sliding plate 22. A sliding groove that slides with the slide rail 17 is provided on the slider 24, and a plurality of abutting blocks 27 for clamping the aluminum alloy side frame 33 are provided on the vertical side wall of the pressing plate 23.

[0044] Reference Figure 1 、 Figure 6 and Figure 7The end of the first push plate 20 away from the pull plate 19 is rotatably connected to the mounting plate 18, and the end of the second push plate 21 away from the pull plate 19 is rotatably connected to the end of the sliding plate 22. The load-bearing frame 2 is provided with a force-bearing plate 28 corresponding to the multiple first tightening assemblies. The force-bearing plate 28 is vertically fixedly connected to the end of the mounting plate 18 away from the limit cylinder 16. The force-bearing plate 28 is connected to a first force-bearing block 29 corresponding to the multiple stop blocks 27. The first force-bearing block 29 contacts the side wall of the aluminum alloy side frame 33 facing away from the limit frame.

[0045] Reference Figure 1 、 Figure 6 and Figure 7 The end of the mounting plate 18 away from the force-bearing plate 28 is connected to a door frame 30, and the door frame 30 cover is arranged outside the pull rod. The top of the door frame 30 is connected to a positioning block 31 by bolts. When the limit frame contacts the aluminum alloy side frame 33, the first push plate 20 and the second push plate 21 are both in a horizontal state, and the positioning block 31 simultaneously contacts the common connection of the pull rod, the first push plate 20 and the second push plate 21.

[0046] The implementation principle of the arc welding deformation control device for a battery tray according to the embodiment of the present application is as follows: the operator places the aluminum alloy base plate 32 on the roller 10, pushes the aluminum alloy base plate 32 to slide with the roller 10, and after moving to the appropriate position, places the reinforcing beam 25 on the aluminum alloy base plate 32, and activates the pushing cylinder 7. The pushing cylinder 7 moves the aluminum alloy base plate 32 and the reinforcing beam 25 together toward the clamping groove 15 until the reinforcing beam 25 is inserted into the clamping groove 15, thereby achieving initial position limiting.

[0047] Then, the plurality of positioning cylinders 11 are started at the same time, and the plurality of positioning cylinders 11 move toward the direction of the aluminum alloy bottom plate 32 at the same time, and the positioning block 34 presses against the aluminum alloy bottom plate 32, further presses against the reinforcing beam 25, so that the aluminum alloy bottom plate 32 is pressed against the load-bearing frame 2, and the clamping claw 14 limits the reinforcing beam 25, and then the positioner is started so that the reinforcing beam 25 is set upward, and the opening of the battery tray is also set upward, and then the aluminum alloy side frame 33 is spliced ​​with the aluminum alloy bottom plate 32 so that the gap to be welded is facing upward, and then the operator starts the limiting cylinder 16, and the piston rod of the limiting cylinder 16 drives the pulling plate 19 to move, and the pulling plate 19 drives the first pushing plate 20 and the second pushing plate 21 to move, and the second pushing plate 21 pushes the sliding plate 22, and the slider 24 slides with the slide rail 17, and the second pushing plate 21 pushes the pressing frame to move toward the aluminum alloy side frame 33, and presses the aluminum alloy side frame 33 against the side wall of the aluminum alloy bottom plate 32;

[0048] Finally, the welding robots on both sides of the positioner weld simultaneously to offset the deformation to the maximum extent. Since the aluminum alloy bottom plate 32, aluminum alloy side frame 33 and reinforcing beam 25 are all limited, the deformation after heating will not cause them to move, thereby improving the quality of the welded battery tray.

[0049] The present application also discloses a battery tray arc welding deformation control device, comprising the following steps:

[0050] S1: placing the aluminum alloy bottom plate 32 on the plurality of slideways 9 and pushing the aluminum alloy bottom plate 32;

[0051] S2: Start the push cylinder 7. When the reinforcement beam 25 is inserted into the corresponding clamping groove 15, close the push cylinder 7.

[0052] S3: Start multiple positioning cylinders 11 simultaneously;

[0053] S4: Start the position shifting machine so that the slide rail 17 is set upward, and the aluminum alloy side frame 33 is spliced ​​with the aluminum alloy bottom plate 32, and then the limit cylinder 16 is started;

[0054] S5: Start the positioner again so that the opening of the battery push plate is set upward, and then use two welding robots to perform welding simultaneously from both sides of the positioner.

[0055] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A battery tray arc welding deformation control device, comprising a placement frame (1) and a load-bearing frame (2), wherein the load-bearing frame (2) is connected to the placement frame (1) via a load-bearing rod (3), and the load-bearing frame (2) is arranged opposite to the placement frame (1), characterized in that: The load-bearing frame (2) is provided with a first limiting member corresponding to a plurality of reinforcing beams (25), the placement frame (1) is slidably connected with a plurality of placement plates (8), the placement frame (1) is provided with a plurality of positioning cylinders (11), the load-bearing frame (2) is provided with a plurality of first tightening assemblies for tightening the aluminum alloy side frame (33), the placement plate (8) is provided with a slideway (9), the slideway (9) includes a plurality of rollers (10) arranged along the length direction of the placement plate (8), the slideway The path (9) is arranged along the width direction of the placement frame (1), and the placement frame (1) is provided with a push cylinder (7) arranged in a one-to-one correspondence with a plurality of placement plates (8), and the piston rod of the push cylinder (7) is connected to the placement plate (8), and the first limit member includes a limit frame and two clamping claws (14), and the limit frame is arranged on the load-bearing frame (2), and the two clamping claws (14) are arranged at both ends of the limit frame, and a clamping groove (15) is provided on the clamping claw (14), and the clamping The connecting groove (15) is pressed against the corresponding reinforcing beam (25), and the first pressing assembly includes a limit cylinder (16), a slide rail (17), a mounting plate (18), a pulling plate (19), a first push plate (20) and a second push plate (21), the mounting plate (18) is arranged on the load-bearing frame (2), the limit cylinder (16) is arranged on the mounting plate (18), the piston rod of the limit cylinder (16) passes through the mounting plate (18) and is connected to the pulling plate (19), the first push plate (20) and the second push plate (21) are connected. The movable plate (20) and the second push plate (21) are both coaxially rotatably connected to the pulling plate (19); the slide rail (17) is arranged on the mounting plate (18); a clamping frame for clamping the aluminum alloy side frame (33) is slidably connected to the slide rail (17); one end of the first push plate (20) away from the pulling plate (19) is rotatably connected to the mounting plate (18); and one end of the second push plate (21) away from the pulling plate (19) is rotatably connected to one end of the clamping frame.

2. The battery tray arc welding deformation control device according to claim 1, characterized in that: The load-bearing frame (2) is provided with a load-bearing plate (28) arranged in one-to-one correspondence with the plurality of the first pressing assemblies, and the load-bearing plate (28) is provided with a first load-bearing block (29), and the first load-bearing block (29) contacts the side wall of the aluminum alloy side frame (33) facing away from the first pressing assembly.

3. The battery tray arc welding deformation control device according to claim 1, characterized in that: It also includes a positioner, wherein one end of the load-bearing frame (2) is connected to the driving shaft (5) of the positioner, and the other end is connected to the driven shaft (6) of the positioner.

4. The battery tray arc welding deformation control device according to claim 1, characterized in that: The mounting plate (18) is provided with a door frame (30), and a positioning block (31) is detachably connected to the door frame (30). When the first pressing component contacts the aluminum alloy side frame (33), the first push plate (20) and the second push plate (21) are both in a horizontal state, and the positioning block (31) simultaneously contacts the common connection between the pulling plate (19), the first push plate (20) and the second push plate (21).

5. A method for using the battery tray arc welding deformation control device according to claim 1, characterized in that: The steps include: S1: placing the aluminum alloy bottom plate (32) on the plurality of slideways (9) and pushing the aluminum alloy bottom plate (32); S2: Start the pushing cylinder (7), and when the reinforcing beam (25) is inserted into the corresponding clamping groove (15), close the pushing cylinder (7); S3: Simultaneously start the plurality of positioning cylinders (11); S4: Start the positioner so that the slide rail (17) is set upward, and the aluminum alloy side frame (33) is spliced ​​with the aluminum alloy bottom plate (32), and then start the limit cylinder (16); S5: The positioner is started again so that the opening of the battery tray is set upward, and then two welding robots are used to perform welding simultaneously from both sides of the positioner.

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