Lightweight new energy battery lower box reverse deformation correction welding tooling

Abstract

The application relates to the technical field of welding tooling, in particular to a light-weight new energy battery lower box reverse deformation correction welding tooling, which comprises a workbench, a front warehouse body and a rear warehouse body which are respectively arranged at the length direction two ends of the top surface of the workbench, and a left side beam and a right side beam which are respectively arranged at the width direction two sides of the top surface of the workbench; a group of fixing mechanisms are arranged on the two sides of the width direction of the top surface of the workbench, the fixing mechanisms are used for positioning the front warehouse body, the rear warehouse body, the left side beam and the right side beam on the workbench; the fixing mechanisms comprise a front warehouse positioning assembly, a side beam positioning assembly and a rear warehouse positioning assembly; the front warehouse positioning assembly is used for fixing the front warehouse body; the side beam positioning assembly is used for positioning the side beam body; and the rear warehouse positioning assembly is used for fixing the rear warehouse body. The application solves the problem that normal welding overall deformation is not conducive to correction, reduces the production cost, and effectively improves the construction quality and work efficiency.

Description

Technical Field

[0001] This application relates to the technical field of welding fixtures, and in particular to a lightweight new energy battery lower housing anti-deformation correction welding fixture. Background Technology

[0002] With the further popularization of new energy electric vehicles, the structure of new energy battery boxes has been continuously optimized, and high safety has become an increasingly important aspect of the design. Currently, welding is widely used in aluminum alloy boxes, accounting for about 60% of the processing volume. Due to the high thermal conductivity of aluminum alloy, deformation is very serious in some areas during welding, especially in the front compartment body, rear compartment body, and side beam body, which have a large amount of welding. The side beam body includes the left and right beams. In related technologies, the front and rear compartment bodies and the left and right beams are prone to arching in the middle after welding, and the two end compartments are prone to sagging. There are cases where the surface profile is seriously out of tolerance and cannot form a sealed cavity, which restricts the product qualification rate. Summary of the Invention

[0003] To improve the welding deformation of the front compartment body, rear compartment body, left beam and right beam, and the problem of welding surface profile exceeding the tolerance and failing to form a sealed chamber, and to improve the product qualification rate, this application provides a lightweight new energy battery lower box anti-deformation correction welding tooling.

[0004] The lightweight new energy battery lower casing anti-deformation correction welding fixture provided in this application adopts the following technical solution:

[0005] A lightweight new energy battery lower housing anti-deformation correction welding fixture includes a workbench, a front compartment body and a rear compartment body respectively placed at both ends of the length direction on the top surface of the workbench, and a left beam and a right beam respectively placed on both sides of the width direction on the top surface of the workbench.

[0006] A set of fixing mechanisms is provided on each side of the top surface of the workbench in the width direction. The fixing mechanisms are used to position the front compartment body, the rear compartment body, the left beam and the right beam on the workbench.

[0007] The fixing mechanism includes a front compartment positioning assembly, a side beam positioning assembly, and a rear compartment positioning assembly; the front compartment positioning assembly includes a front compartment positioning pin, a first clamping mechanism, and a second clamping mechanism, which are used to fix the front compartment body.

[0008] The side beam positioning assembly includes a third clamping mechanism, a fourth clamping mechanism A, a fourth clamping mechanism B, a fifth clamping mechanism, a sixth clamping mechanism, an anti-deformation pressure block, a first side beam positioning pin, and a second side beam positioning pin. The fourth clamping mechanism B and the sixth clamping mechanism are located near the front compartment positioning assembly and the rear compartment positioning assembly, respectively, and are used to clamp and straighten both ends of the side beam body. The third and fifth clamping mechanisms are located between the fourth clamping mechanism B and the sixth clamping mechanism. Used to press the middle part of the side beam body; the anti-deformation pressure block is set on the fourth pressing mechanism A and abuts against the top surface of the side beam body; the first side beam positioning pin and the second side beam positioning pin are respectively close to the front compartment positioning component and the rear compartment positioning component, and are used to position the two ends of the side beam body; the worktable is fixed with the side beam first positioning pin adjustment block & side beam height adjustment block and the side beam second positioning pin adjustment block by bolts, and the first side beam positioning pin and the second side beam positioning pin are respectively located on the side beam second positioning pin adjustment block and the side beam first positioning pin adjustment block & side beam height adjustment block;

[0009] The rear compartment positioning assembly includes a rear compartment positioning pin, a seventh clamping mechanism, an eighth clamping mechanism, and a ninth clamping mechanism. The ninth clamping mechanism is located near the first positioning pin adjustment block and the side beam height adjustment block of the side beam. The rear compartment positioning pin, the seventh clamping mechanism, the eighth clamping mechanism, and the ninth clamping mechanism are used to fix the rear compartment body.

[0010] Optionally, the side beam positioning assembly further includes a first side beam positioning L-block, a second side beam positioning L-block, a third side beam positioning L-block, and a fourth side beam positioning L-block, all of which are fixed to the workbench by bolts.

[0011] The first and fourth side beam positioning L-blocks are located close to the front and rear compartment positioning components, respectively. The second and third side beam positioning L-blocks are located between the first and fourth side beam positioning L-blocks and are arranged side by side. The side of the side beam body is limited by the side cooperation of the first, second, third, and fourth side beam positioning L-blocks.

[0012] Optionally, a side beam anti-deformation adjustment block is fixedly installed on the workbench by bolts. The side beam anti-deformation adjustment block is adapted to the bottom side of the side beam body. The side beam anti-deformation adjustment block is located between the second side beam positioning L block and the third side beam positioning L block. The side beam body is placed on the side beam anti-deformation adjustment block and is pressed tightly by the anti-deformation pressure block.

[0013] Optionally, a number of adjusting shims are placed on the workbench, the adjusting shims are stacked below the side beam anti-deformation adjusting block, and the top surface of the adjusting shims abuts against the bottom surface of the side beam anti-deformation adjusting block.

[0014] Optionally, the workbench is fixed with a front compartment height adjustment block, a rear compartment height adjustment block and a second rear compartment height adjustment block by bolts. The front compartment height adjustment block is located directly below the front compartment positioning pin. The front compartment positioning pin is inserted into the front compartment height adjustment block, and the front compartment body is positioned on the front compartment height adjustment block by the front compartment positioning pin.

[0015] The rear compartment height adjustment block is located directly below the rear compartment positioning pin. The rear compartment positioning pin is inserted into the rear compartment height adjustment block, and the rear compartment body is positioned on the rear compartment height adjustment block by the rear compartment positioning pin. The second rear compartment height adjustment block is located directly below the ninth pressing mechanism.

[0016] Optionally, the worktable is further secured with bolts along the direction from the front compartment positioning component to the rear compartment positioning component, including a first side beam height adjustment block, a second side beam height adjustment block, a third side beam height adjustment block, and a side beam first positioning pin adjustment block & side beam height adjustment block; the first side beam height adjustment block is located directly below the fourth pressing mechanism B, the second side beam height adjustment block is located directly below the third pressing mechanism, the third side beam height adjustment block is located directly below the fifth pressing mechanism, and the side beam first positioning pin adjustment block & side beam height adjustment block is located directly below the sixth pressing mechanism.

[0017] The bottom surface of the side beam body is pressed against the first side beam height adjustment block, the second side beam height adjustment block, the third side beam height adjustment block, and the side beam first positioning pin adjustment block & side beam height adjustment block by the fourth pressing mechanism B, the third pressing mechanism, the fifth pressing mechanism and the sixth pressing mechanism.

[0018] Optionally, the first, second, third, fourth (A), fourth (B), fifth, sixth, seventh, eighth, and ninth pressing mechanisms all include an adjustable support rod, a pressure plate, and a fixing screw. One end of the adjustable support rod is supported and overlapped on the worktable, and the other end of the adjustable support rod is threadedly and adjustablely connected to the pressure plate. A slotted hole is provided on the top surface of the pressure plate, and the rod of the fixing screw passes through the slotted hole and is threadedly and rotatably connected to the worktable. The nut of the fixing screw is engaged outside the slotted hole.

[0019] Optionally, a first pushing mechanism and a second pushing mechanism are provided on the top surface of the workbench. The first pushing mechanism and the second pushing mechanism are respectively arranged opposite to the first side beam positioning L block and the fourth side beam positioning L block, and cooperate to press the side beam body together.

[0020] The pushing and tightening mechanism includes a mounting block, a fixed block, a pushing and tightening block, a movable block, a connecting block, and a clamping block. The mounting block is fixedly installed on the top surface of the workbench. The fixed block is fixed to the mounting block by bolts. The bottom surface of the movable block abuts against the top of the lower step of the mounting block, and the movable block and the fixed block are arranged opposite to each other. A "T"-shaped slot is opened on the opposite side of the movable block and the fixed block. The "T"-shaped slot passes through the top surface of the fixed block and the movable block. The pushing and tightening block is located between the fixed block and the movable block. "T"-shaped blocks are fixedly connected to both ends of the pushing and tightening block, and the "T"-shaped blocks are correspondingly inserted into the "T"-shaped slots.

[0021] The push block and the movable block abut against each other on their adjacent sides and are fitted wedge-shaped surfaces. The push block is provided with bolts, which are locked downwards. The push block moves downwards, and the movable block moves away from the fixed block. The abutting block is fixedly connected to the movable block away from the fixed block via a connecting block. The abutting block is used to abut against the side of the side beam body.

[0022] The "T"-shaped block and the "T"-shaped slot are slidably connected. One side of the pushing block slides vertically in the "T"-shaped slot of the fixed block through the "T"-shaped block, and the other side of the pushing block slides obliquely in the "T"-shaped slot of the movable block through the "T"-shaped block, thereby driving the movable block away from and closer to the fixed block.

[0023] By adopting the above technical solution, after the side beam body is placed, the push-press block is locked by the bolts on the push-press block. Under the action of the wedge surface, the movable block moves towards the side beam body until the pressing block presses against the side of the side beam body. Then, the fixing block is locked by the bolts. The bolts and the wedge surface self-lock, and the side beam body is positioned and locked.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. Improve the quality stability and pass rate of anti-deformation welded workpieces, with a pass rate as high as 98%, and the 2% defective workpieces can be brought up to standard through simple correction work;

[0026] 2. The object undergoing anti-deformation is relatively long. The 0.6mm / m torsional deformation generated during the fabrication of the side beam profile, the internal stress after processing, and the thermal deformation after welding result in multiple deformation directions for the workpiece. This application can achieve a surface profile accuracy of 0.4mm within a 2430mm length range after welding the left and right long side beams and the interfaces of the front and rear compartments. It solves the problem of high-precision deformation control of 0.4mm surface profile accuracy after welding thermal deformation within a 2430mm length, and achieves more precise control and adjustment of anti-deformation.

[0027] 3. It solves the problem of correcting welding deformation in the early stage, saves a lot of manpower, eliminates the labor cost of the correction process, and helps to solve the pain point of welding deformation correction requiring off-line operation and low efficiency in mass production; it can also solve the problem of workpiece scratching after deformation correction, which causes secondary quality problems.

[0028] 4. It solves the problem of industrialized production and enables in-line assembly line production;

[0029] 5. By eliminating the straightening process, the noise from workshop straightening and the management issues of off-line straightening are eliminated. Approximately one defective part every 1-2 days is handled by the off-line rework team.

[0030] 6. Correcting minor deformations caused by bending, twisting, and internal stress during processing in the profile itself. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a lightweight new energy battery lower casing anti-deformation correction welding fixture according to an embodiment of this application.

[0032] Figure 2 This is a structural diagram used to illustrate the various states of the product in the embodiments of this application.

[0033] Figure 3 This is a structural schematic diagram of the workbench and the fixing mechanism on one side, as shown in the embodiments of this application.

[0034] Figure 4 This is a structural schematic diagram used to illustrate one side of the fixing mechanism in the embodiments of this application.

[0035] Figure 5 This is a structural schematic diagram of the front compartment positioning component used in the embodiments of this application.

[0036] Figure 6 This is a structural schematic diagram of the side beam positioning component used in the embodiments of this application.

[0037] Figure 7 This is a schematic diagram illustrating the structure of the adjustment shim in an embodiment of this application.

[0038] Figure 8 This is a schematic diagram illustrating the specific structure of the first and second pressing mechanisms in the embodiments of this application.

[0039] Explanation of reference numerals in the attached drawings: 1. Front compartment positioning pin; 111. Front compartment body; 112. Rear compartment body; 113. Side beam body; 114. Left side beam; 115. Right side beam; 116. Fixing mechanism; 117. Front compartment positioning assembly; 118. Side beam positioning assembly; 119. Rear compartment positioning assembly; 2. Front compartment height adjustment block; 3. First clamping mechanism; 4. First side beam positioning pin; 5. First pushing mechanism; 6. Second clamping mechanism; 7. Third clamping mechanism; 8. Anti-deformation pressure block; 9. Second side beam positioning L-block; 10. Adjusting shim; 11. Second pushing mechanism; 12. Fifth clamping mechanism; 13. Seventh clamping mechanism; 14. Sixth clamping mechanism; 15. Eighth clamping mechanism; 16. Rear compartment positioning pin; 17. Rear compartment height adjustment block; 18. Ninth clamping mechanism; 19. Second rear compartment height adjustment block. 20. Second side beam positioning pin; 21. Side beam first positioning pin adjustment block & side beam height adjustment block; 22. Fourth side beam positioning L-block; 23. Third side beam height adjustment block; 24. Fourth clamping mechanism; 25. Third side beam positioning L-block; 26. Side beam anti-deformation adjustment block; 27. Second side beam height adjustment block; 28. First side beam positioning L-block; 29. ​​Side beam second positioning pin adjustment block; 30. Fourth clamping mechanism; 31. First side beam height adjustment block; 32. Adjustable support rod; 33. Pressure plate; 331. Waist-shaped hole; 34. Fixing screw; 35. Workbench; 361. Mounting block; 362. Fixing block; 363. Pushing block; 364. Movable block; 365. Connecting block; 366. Abutting block; 367. "T" shaped slot; 368. "T" shaped block; 369. Wedge-shaped surface. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0041] This application discloses a lightweight welding fixture for correcting deformation of the lower casing of a new energy battery. (Refer to...) Figure 1 The lightweight new energy battery lower box anti-deformation correction welding fixture includes a workbench 35, a front compartment body 111 and a rear compartment body 112 respectively placed at both ends of the length direction on the top surface of the workbench 35, and a left beam 114 and a right beam 115 respectively placed on both sides of the width direction on the top surface of the workbench 35.

[0042] Reference Figure 1-4On each side of the top surface of the workbench 35 in the width direction, there is a set of fixing mechanisms 116. The fixing mechanisms 116 are used to position the front compartment body 111, the rear compartment body 112, the left beam 114, and the right beam 115 on the workbench 35. The fixing mechanism 116 includes a front compartment positioning component 117, a side beam positioning component 118, and a rear compartment positioning component 119. The front compartment positioning component 117 includes a front compartment positioning pin 1, a first pressing mechanism 3, and a second pressing mechanism 6. The front compartment positioning pin 1, the first pressing mechanism 3, and the second pressing mechanism 6 are used to fix the front compartment body.

[0043] Reference Figure 4-7 The side beam positioning assembly 118 includes a third clamping mechanism 7, a fourth clamping mechanism A24, a fourth clamping mechanism B30, a fifth clamping mechanism 12, a sixth clamping mechanism 14, an anti-deformation pressure block 8, a first side beam positioning pin 4, a second side beam positioning pin 20, a first side beam positioning L-block 28, a second side beam positioning L-block 9, a third side beam positioning L-block 25, and a fourth side beam positioning L-block 22. The fourth clamping mechanism B30 and the sixth clamping mechanism 14 are located near the front compartment positioning assembly 117 and the rear compartment positioning assembly 119, respectively, and are used to clamp and straighten the two ends of the side beam body 113. The third clamping mechanism 7 and the fifth clamping mechanism 12 are located between the fourth clamping mechanism B30 and the sixth clamping mechanism 14, and are used to clamp the middle part of the side beam body 113. The anti-deformation pressure block 8 is fixedly mounted on the fourth pressing mechanism A24 and abuts against the top surface of the side beam body 113. The first side beam positioning pin 4 and the second side beam positioning pin 20 are respectively close to the front compartment positioning component 117 and the rear compartment positioning component 119, and are used to position both ends of the side beam body 113.

[0044] Reference Figure 4-7 The rear compartment positioning assembly 119 includes a rear compartment positioning pin 16, a seventh clamping mechanism 13, an eighth clamping mechanism 15, and a ninth clamping mechanism 18. The rear compartment positioning pin 16, the seventh clamping mechanism 13, the eighth clamping mechanism 15, and the ninth clamping mechanism 18 are used to fix the rear compartment body. The first side beam positioning L-block 28, the second side beam positioning L-block 9, the third side beam positioning L-block 25, and the fourth side beam positioning L-block 22 are all fixed to the worktable 35 by bolts. The first side beam positioning L-block 28 and the fourth side beam positioning L-block 22 are located close to the front compartment positioning component 117 and the rear compartment positioning component 119, respectively. The second side beam positioning L-block 9 and the third side beam positioning L-block 25 are both located between the first side beam positioning L-block 28 and the fourth side beam positioning L-block 22, and the second side beam positioning L-block 9 and the third side beam positioning L-block 25 are arranged side by side. The side of the side beam body 113 is limited by the cooperation of the side of the first side beam positioning L-block 28, the second side beam positioning L-block 9, the third side beam positioning L-block 25 and the fourth side beam positioning L-block 22.

[0045] Reference Figure 4-7 A side beam anti-deformation adjustment block 26 is fixedly installed on the workbench 35 by bolts. The side beam anti-deformation adjustment block 26 is adapted to the bottom side of the side beam body 113. The side beam anti-deformation adjustment block 26 is located between the second side beam positioning L block 9 and the third side beam positioning L block 25. The side beam body 113 is placed on the side beam anti-deformation adjustment block 26 and is pressed tightly by the anti-deformation pressure block 8. Several adjustment shims 10 are placed on the workbench 35. The adjustment shims 10 are stacked under the side beam anti-deformation adjustment block 26, and the top surface of the adjustment shims 10 abuts against the bottom surface of the side beam anti-deformation adjustment block 26.

[0046] Reference Figure 4-7 The workbench 35 is bolted with a front compartment height adjustment block 2, a rear compartment height adjustment block 17, and a second rear compartment height adjustment block 19. The front compartment height adjustment block 2 is located directly below the front compartment positioning pin 1, which is inserted into the front compartment height adjustment block 2. The front compartment body 111 is positioned on the front compartment height adjustment block 2 via the front compartment positioning pin 1. The rear compartment height adjustment block 17 is located directly below the rear compartment positioning pin 16, which is inserted into the rear compartment height adjustment block 17. The second rear compartment height adjustment block 19 is located directly below the ninth pressing mechanism 18. The rear compartment body 112 is positioned on the rear compartment height adjustment block 17 via the rear compartment positioning pin 16. The second rear compartment height adjustment block 19 is located directly below the ninth pressing mechanism 18.

[0047] Reference Figure 4-7 On the workbench 35, along the direction from the front compartment positioning component 117 toward the rear compartment positioning component 119, there are also bolts fixing a first side beam height adjustment block 31, a second side beam height adjustment block 27, a third side beam height adjustment block 23, and a side beam first positioning pin adjustment block & side beam height adjustment block 21; the first side beam height adjustment block 31 is located directly below the fourth pressing mechanism B30, the second side beam height adjustment block 27 is located directly below the third pressing mechanism 7, the third side beam height adjustment block 23 is located directly below the fifth pressing mechanism 12, and the side beam first positioning pin adjustment block & side beam height adjustment block 21 is located directly below the sixth pressing mechanism 14.

[0048] Reference Figure 4-7The bottom surface of the side beam body 113 is pressed against the first side beam height adjustment block 31, the second side beam height adjustment block 27, the third side beam height adjustment block 23, and the side beam first positioning pin adjustment block & side beam height adjustment block 21 by the fourth pressing mechanism B30, the third pressing mechanism 7, the fifth pressing mechanism 12 and the sixth pressing mechanism 14. The first pressing mechanism 3, the second pressing mechanism 6, the third pressing mechanism 7, the fourth pressing mechanism A24, the fourth pressing mechanism B30, the fifth pressing mechanism 12, the sixth pressing mechanism 14, the seventh pressing mechanism 13, the eighth pressing mechanism 15, and the ninth pressing mechanism 18 all include an adjustable support rod 32, a pressure plate 33, and a fixing screw 34. One end of the adjustable support rod 32 is supported and connected to the worktable 35, and the other end of the adjustable support rod 32 is threadedly and adjustablely connected to the pressure plate 33. A waist-shaped hole 331 is opened on the top surface of the pressure plate 33. The rod of the fixing screw 34 passes through the waist-shaped hole 331 and is threadedly and rotatably connected to the worktable 35. The nut of the fixing screw 34 is locked outside the waist-shaped hole 331.

[0049] Reference Figure 4-8 The top surface of the workbench 35 is provided with a first pushing mechanism 5 and a second pushing mechanism 11. The first pushing mechanism 5 and the second pushing mechanism 11 are respectively positioned opposite to the first side beam positioning L block 28 and the fourth side beam positioning L block 22, and cooperate to abut the side beam body 113. The pushing mechanism includes a mounting block 361, a fixing block 362, a pushing block 363, a movable block 364, a connecting block 365, and abutting block 366. The mounting block 361 is fixedly mounted on the top surface of the workbench 35. The fixing block 362 is fixed to the mounting block 361 by bolts. The bottom surface of the movable block 364 abuts against the top of the lower step of the mounting block 361, and the movable block 364 is positioned opposite to the fixing block 362. A "T"-shaped slot 367 is opened on the opposite side of the movable block 364 and the fixing block 362. The "T"-shaped slot 367 passes through the fixing block 362 and the movable block 364. On the top surface of the movable block 364, the pusher block 363 is located between the fixed block 362 and the movable block 364. The two ends of the pusher block 363 are fixedly connected with "T"-shaped blocks 368. The "T"-shaped blocks 368 and the "T"-shaped slots 367 are slidably connected. One side of the pusher block 363 slides vertically in the "T"-shaped slots 367 of the fixed block 362 through the "T"-shaped blocks 368. The other side of the pusher block 363 slides obliquely in the "T"-shaped slots 367 of the movable block 364 through the "T"-shaped blocks 368, thereby driving the movable block 364 away from and closer to the fixed block 362.

[0050] Reference Figure 8The push-tightening block 363 and the movable block 364 abut against each other on their adjacent sides, forming a matching wedge-shaped surface 369. A bolt is provided on the push-tightening block 363. By tightening and pressing down on the bolt, the push-tightening block 363 moves downwards, and the movable block 364 moves away from the fixed block 362. The abutting block 366 is fixedly connected to the side of the movable block 364 away from the fixed block 362 via a connecting block 365. The abutting block 366 is used to press against the side of the side beam body 113. After the side beam body 113 is placed, the locking bolt presses down on the push-tightening block 363. Under the action of the wedge-shaped surface 369, the movable block 364 moves towards the side beam body 113 until the abutting block 366 presses against the side of the side beam body 113. The bolt and the wedge-shaped surface 369 self-lock, and the side beam body 113 is positioned and locked.

[0051] In addition to the 0.6mm / m torsional deformation generated during the fabrication of the side beam profile and the multi-directional internal stress after the side beam profile is processed, the heat generated by welding and the shaping of the anti-deformation tooling are integrated after the frame is welded. The side beam workpiece is shaped after cooling. After welding, the shrinkage tension pulls the side beam workpiece in the opposite direction, realizing thermal shaping. The amount of anti-deformation is offset by the cutting stress of the profile and the amount of local thermal deformation, so that the workpiece is straightened and the straightness of the product after welding is qualified.

[0052] The implementation principle of the lightweight new energy battery lower box anti-deformation correction welding fixture in this application embodiment is as follows: the left beam 114, right beam 115, front compartment body 111 and rear compartment body 112 and other components are placed on the workbench 35, and the front compartment body 111 and rear compartment body 112 are positioned by the front compartment positioning pin 1 and the rear compartment positioning pin 16 respectively, and the two ends of the side beam body 113 are positioned by the first side beam positioning pin 4 and the second side beam positioning pin 20 respectively.

[0053] Then, the front compartment body 111 is locked by the first pressing mechanism 3 and the second pressing mechanism 6, the rear compartment body 112 is locked by the seventh pressing mechanism 13, the eighth pressing mechanism 15 and the ninth pressing mechanism 18, and the side beam body 113 is pre-locked by the third pressing mechanism 7, the fourth pressing mechanism A24, the fourth pressing mechanism B30, the fifth pressing mechanism 12, the sixth pressing mechanism 14 and the anti-deformation pressure block 8. Loosen the locking bolts on the first side beam positioning L block 28, the third side beam positioning L block 25 and the fourth side beam positioning L block 22, so that the first side beam positioning L block 28, the third side beam positioning L block 25 and the fourth side beam positioning L block 22 are tightly attached to the side beam body 113, and then tighten the locking bolts on the first side beam positioning L block 28, the third side beam positioning L block 25 and the fourth side beam positioning L block 22.

[0054] Then, apply 6 parts force to tighten the first and second pushing mechanisms 5 and 11, and then press and lock the second side beam positioning block L9; appropriately lock the third and sixth pressing mechanisms 7 and 14; then remove the first and second side beam positioning pins 4 and 20, and then lock the fourth pressing mechanism A24 until the bottom surface of the side beam body 113 is pressed against the reference surface of the anti-deformation pressure block 8; lock the fourth pressing mechanism B30 and the sixth pressing mechanism 14 until the bottom surface of the side beam body 113 is pressed against the first positioning pin adjustment block and the side beam. The height adjustment block 21 is tightened until it is flush with the reference surface; then the first pushing mechanism 5 and the second pushing mechanism 11 are locked, the second side beam positioning block L9 is locked, and then the third pressing mechanism 7 and the sixth pressing mechanism 14 are locked. All anti-deformation mechanisms are assembled here. The right beam 115 is assembled according to the same process. This application embodiment only shows the left side structure of the tooling. The right side structure is the same as the left side structure and is symmetrically arranged. After all welding is completed, the workpiece can be removed after cooling and confirmed with a platform and feeler gauge. After confirmation, the subsequent welding can be carried out.

[0055] Deformation adjustment: Based on the camber size of the side beam after natural welding, a 3mm deformation preset is initially made. The number of shims 10 is adjusted by increasing or decreasing the amount of deformation after reverse welding. When the adjustment amount is between 1-3mm at the substandard location, a 1mm displacement is applied during welding adjustments each time. When the adjustment amount is between 0.1-0.9mm at the substandard location, a 0.3-0.5mm displacement is applied during welding adjustments each time, until the quality measurement data shows a normal distribution and is considered acceptable. Based on several welding data sessions, in this embodiment, a 4mm downward pressure is sufficient to achieve the desired post-weld effect.

[0056] This application presents an anti-deformation tooling design for the full-circumference welding deformation of the front compartment body 111 and the side beam body 113. It solves the drawbacks of normal welding deformation being difficult to correct and hindering large-scale production. It also solves the problems of shaping the 0.6mm / m torsional deformation generated during the fabrication of the side beam profile and eliminating the internal stress of the side beam profile after processing. The deformation is stably controlled. Within the overall length range of 2430mm, the profile after deformation is within an acceptable range of 0.4mm. It also helps to solve the manufacturing pain points of welding deformation between the side beam body 113 and the front and rear compartment bodies 112 and the need for correction after welding. It is safe, fast, easy to use, efficient, and has stable quality. It reduces production costs while effectively improving construction quality and work efficiency.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lightweight new energy battery lower housing anti-deformation correction welding fixture, characterized in that: The workbench (35) includes a front compartment body (111) and a rear compartment body (112) placed at both ends of the length direction on the top surface of the workbench (35), and a left beam (114) and a right beam (115) placed on both sides of the width direction on the top surface of the workbench (35). A set of fixing mechanisms (116) is provided on each side of the top surface of the workbench (35) in the width direction. The fixing mechanisms (116) are used to position the front compartment body (111), the rear compartment body (112), the left beam (114) and the right beam (115) on the workbench (35). The fixing mechanism (116) includes a front compartment positioning assembly (117), a side beam positioning assembly (118), and a rear compartment positioning assembly (119); the front compartment positioning assembly (117) includes a front compartment positioning pin (1), a first pressing mechanism (3), and a second pressing mechanism (6), which are used to fix the front compartment body; The side beam positioning assembly (118) includes a third clamping mechanism (7), a fourth clamping mechanism A (24), a fourth clamping mechanism B (30), a fifth clamping mechanism (12), a sixth clamping mechanism (14), an anti-deformation pressure block (8), a first side beam positioning pin (4), and a second side beam positioning pin (20). The fourth clamping mechanism B (30) and the sixth clamping mechanism (14) are located close to the front compartment positioning assembly (117) and the rear compartment positioning assembly (119), respectively. The fourth clamping mechanism B (30) and the sixth clamping mechanism (14) are used to clamp and straighten the two ends of the side beam body (113), respectively. The third clamping mechanism (7) and the fifth clamping mechanism (12) are located between the fourth clamping mechanism B (30) and the sixth clamping mechanism (14), and the third clamping mechanism (7) and The fifth clamping mechanism (12) is used to clamp the middle part of the side beam body (113); the anti-deformation pressure block (8) is set on the fourth clamping mechanism A (24) and abuts against the top surface of the side beam body (113); the first side beam positioning pin (4) and the second side beam positioning pin (20) are close to the front compartment positioning component (117) and the rear compartment positioning component (119) respectively, and are used to position the two ends of the side beam body (113); the workbench (35) is fixed with the side beam first positioning pin adjustment block & side beam height adjustment block (21) and the side beam second positioning pin adjustment block (29) by bolts, the first side beam positioning pin (4) and the second side beam positioning pin (20) are located on the side beam second positioning pin adjustment block (29) and the side beam first positioning pin adjustment block & side beam height adjustment block (21) respectively; The rear compartment positioning assembly (119) includes a rear compartment positioning pin (16), a seventh clamping mechanism (13), an eighth clamping mechanism (15), and a ninth clamping mechanism (18). The ninth clamping mechanism (18) is located near the first positioning pin adjustment block and the side beam height adjustment block (21) of the side beam. The rear compartment positioning pin (16), the seventh clamping mechanism (13), the eighth clamping mechanism (15), and the ninth clamping mechanism (18) are used to fix the rear compartment body. The first pressing mechanism (3), the second pressing mechanism (6), the third pressing mechanism (7), the fourth pressing mechanism A (24), the fourth pressing mechanism B (30), the fifth pressing mechanism (12), the sixth pressing mechanism (14), the seventh pressing mechanism (13), the eighth pressing mechanism (15), and the ninth pressing mechanism (18) all include an adjustable support rod (32), a pressure plate (33), and a fixing screw (34). One end of the adjustable support rod (32) is supported and overlapped on the workbench (35), and the other end of the adjustable support rod (32) is threadedly and adjustablely connected to the pressure plate (33). A waist-shaped hole (331) is opened on the top surface of the pressure plate (33). The rod of the fixing screw (34) passes through the waist-shaped hole (331) and is threadedly and rotatably connected to the workbench (35). The nut of the fixing screw (34) is locked outside the waist-shaped hole (331).

2. The lightweight new energy battery lower housing anti-deformation correction welding fixture according to claim 1, characterized in that: The side beam positioning assembly (118) further includes a first side beam positioning L-block (28), a second side beam positioning L-block (9), a third side beam positioning L-block (25), and a fourth side beam positioning L-block (22). The first side beam positioning L-block (28), the second side beam positioning L-block (9), the third side beam positioning L-block (25), and the fourth side beam positioning L-block (22) are all fixed to the workbench (35) by bolts. The first side beam positioning L-block (28) and the fourth side beam positioning L-block (22) are close to the front compartment positioning component (117) and the rear compartment positioning component (119), respectively. The second side beam positioning L-block (9) and the third side beam positioning L-block (25) are both located between the first side beam positioning L-block (28) and the fourth side beam positioning L-block (22), and the second side beam positioning L-block (9) and the third side beam positioning L-block (25) are arranged side by side. The side of the side beam body (113) is limited by the cooperation of the side of the first side beam positioning L-block (28), the second side beam positioning L-block (9), the third side beam positioning L-block (25) and the fourth side beam positioning L-block (22).

3. The lightweight new energy battery lower housing anti-deformation correction welding fixture according to claim 2, characterized in that: The workbench (35) is fixed with a side beam anti-deformation adjustment block (26) by bolts. The side beam anti-deformation adjustment block (26) is adapted to the bottom side of the side beam body (113). The side beam anti-deformation adjustment block (26) is located between the second side beam positioning L block (9) and the third side beam positioning L block (25). The side beam body (113) is placed on the side beam anti-deformation adjustment block (26) and is pressed by the anti-deformation pressure block (8).

4. The lightweight new energy battery lower housing anti-deformation correction welding fixture according to claim 3, characterized in that: Several adjusting shims (10) are placed on the workbench (35). The adjusting shims (10) are stacked below the side beam anti-deformation adjusting block (26), and the top surface of the adjusting shims (10) abuts against the bottom surface of the side beam anti-deformation adjusting block (26).

5. The lightweight new energy battery lower housing anti-deformation correction welding fixture according to claim 1, characterized in that: The workbench (35) is fixed with bolts to a front compartment height adjustment block (2), a rear compartment height adjustment block (17), and a second rear compartment height adjustment block (19). The front compartment height adjustment block (2) is located directly below the front compartment positioning pin (1). The front compartment positioning pin (1) is inserted into the front compartment height adjustment block (2), and the front compartment body (111) is positioned on the front compartment height adjustment block (2) by the front compartment positioning pin (1). The rear compartment height adjustment block (17) is located directly below the rear compartment positioning pin (16), the rear compartment positioning pin (16) is inserted into the rear compartment height adjustment block (17), and the rear compartment body (112) is positioned on the rear compartment height adjustment block (17) by the rear compartment positioning pin (16); the second rear compartment height adjustment block (19) is located directly below the ninth pressing mechanism (18).

6. The lightweight new energy battery lower housing anti-deformation correction welding fixture according to claim 1, characterized in that: The workbench (35) is also bolted with a first side beam height adjustment block (31), a second side beam height adjustment block (27), a third side beam height adjustment block (23), and a side beam first positioning pin adjustment block & side beam height adjustment block (21); the first side beam height adjustment block (31) is located directly below the fourth pressing mechanism B (30), the second side beam height adjustment block (27) is located directly below the third pressing mechanism (7), the third side beam height adjustment block (23) is located directly below the fifth pressing mechanism (12), and the side beam first positioning pin adjustment block & side beam height adjustment block (21) is located directly below the sixth pressing mechanism (14); The bottom surface of the side beam body (113) is pressed against the first side beam height adjustment block (31), the second side beam height adjustment block (27), the third side beam height adjustment block (23), and the side beam first positioning pin adjustment block & side beam height adjustment block (21) by the fourth pressing mechanism B (30), the third pressing mechanism (7), the fifth pressing mechanism (12) and the sixth pressing mechanism (14).

7. The lightweight new energy battery lower housing anti-deformation correction welding fixture according to claim 2, characterized in that: The top surface of the workbench (35) is provided with a first pushing mechanism (5) and a second pushing mechanism (11). The first pushing mechanism (5) and the second pushing mechanism (11) are respectively arranged opposite to the first side beam positioning L block (28) and the fourth side beam positioning L block (22), and cooperate to press the side beam body (113) against each other. The pushing mechanism includes a mounting block (361), a fixing block (362), a pushing block (363), a movable block (364), a connecting block (365), and a clamping block (366). The mounting block (361) is fixedly mounted on the top surface of the workbench (35). The fixing block (362) is fixed to the mounting block (361) by bolts. The bottom surface of the movable block (364) abuts against the top of the lower step of the mounting block (361), and the movable block (364) and the fixing block (362) are positioned opposite each other. The movable block (364) and the fixed block (362) are provided with "T"-shaped slots (367) on their opposite sides. The "T"-shaped slots (367) penetrate the top surfaces of the fixed block (362) and the movable block (364). The push block (363) is located between the fixed block (362) and the movable block (364). The two ends of the push block (363) are fixedly connected with "T"-shaped blocks (368), and the "T"-shaped blocks (368) are correspondingly inserted into the "T"-shaped slots (367). The push block (363) and the movable block (364) abut against each other on their adjacent sides and are fitted with wedge-shaped surfaces (369). The push block (363) is provided with bolts. The bolts on the push block (363) are locked downwards. The push block (363) moves downwards, and the movable block (364) moves away from the fixed block (362). The abutting block (366) is fixedly connected to the side of the movable block (364) away from the fixed block (362) through a connecting block (365). The abutting block (366) is used to abut against the side of the side beam body (113). The "T"-shaped block (368) and the "T"-shaped slot (367) are slidably connected. One side of the push block (363) slides vertically in the "T"-shaped slot (367) of the fixed block (362) through the "T"-shaped block (368). The other side of the push block (363) slides obliquely in the "T"-shaped slot (367) of the movable block (364) through the "T"-shaped block (368), thereby driving the movable block (364) away from and closer to the fixed block (362).

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