A new energy battery pack beam welding reverse deformation tool and reverse deformation method

Abstract

The application relates to a reverse deformation tool and a reverse deformation method for welding a new energy battery pack beam, which comprises a bottom plate, a backrest for positioning one end of the beam in the length direction, a positioning module for positioning a reinforcing block, a fixed pressing module for fixing two ends of the beam in the length direction, a reverse deformation adjustment module for reverse deformation adjustment of a welding position of the beam and the reinforcing block, and an auxiliary adjustment module for reverse deformation adjustment of the middle part of the beam in the length direction. The application solves the correction work after the previous welding deformation, saves a large amount of labor, eliminates the labor cost of the shaping process, reduces the situation that the workpiece is scratched after deformation and correction, avoids customer complaints, removes the correction process, eliminates the noise of workshop correction, solves the industrial production problem, can realize in-line assembly line production, and solves the situation that the frame assembly quality is unqualified due to the deformation of the bent, twisted and processed internal stress of the profile itself.

Description

Technical Field

[0001] This invention relates to the technical field of welding new energy battery pack frames, and in particular to an anti-deformation tooling and method for welding crossbeams of new energy battery packs. Background Technology

[0002] With the further popularization of new energy electric vehicles, the structure of new energy battery boxes is constantly being optimized. Lightweight, high strength, and high safety are becoming increasingly important in the design. Currently, welding is widely used in aluminum alloy boxes, accounting for about 60% of the processing volume. However, due to the high thermal conductivity of aluminum alloy, deformation is very serious in some areas during welding, which severely restricts the output of the workshop and is not conducive to the company's development.

[0003] Reinforcing blocks need to be welded onto the crossbeams of the new energy battery frame. When welding the crossbeams and reinforcing blocks, the feasible processes are divided into two types: assembly welding and crossbeam sub-assembly welding.

[0004] Process Option 1: Weld directly on the assembly welding fixture. However, due to the large amount of welding between the crossbeam and the reinforcing block, the deformation after welding is severe. The crossbeam will bend and deform in the direction away from the reinforcing block, affecting the function of the new energy battery pack frame. Due to the large amount of welding and the small space of the fixture, welding is not possible in many places. The deformation after removal and re-welding is uncontrollable. This option is unreliable after verification.

[0005] Process Option 2: Welding of the crossbeam sub-assembly. In the existing technology, after the crossbeam is welded to the reinforcing block, it has a centrally convex arc shape, which cannot be welded to the battery pack box. The deformed crossbeam needs to be corrected before assembly and welding, which greatly increases the workload in the workshop and is not conducive to mass production. It not only reduces work efficiency, but also the correction after deformation can easily scratch the workpiece, causing customer complaints. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides an anti-deformation tooling and method for welding the crossbeams of new energy battery packs.

[0007] Firstly, the anti-deformation tooling for welding the crossbeam of a new energy battery pack provided in this application adopts the following technical solution:

[0008] An anti-deformation tooling for welding the crossbeam of a new energy battery pack includes:

[0009] Base plate;

[0010] The support is fixed to one end of the base plate along its length and is used to position one end of the crossbeam along its length.

[0011] The positioning module is used to position the reinforcing block.

[0012] A fixed clamping module is used to fix both ends of the crossbeam along its length.

[0013] The anti-deformation adjustment module is used to adjust the welding position between the crossbeam and the reinforcing block in the opposite direction of deformation.

[0014] The auxiliary adjustment module is used to perform reverse deformation adjustment on the middle part of the crossbeam along its length.

[0015] Both the anti-deformation adjustment module and the auxiliary adjustment module include:

[0016] Limiting component one is used to position the crossbeam in the width direction;

[0017] An adjustment mechanism one, wherein the adjustment mechanism one and the limiting component one are located on opposite sides of the crossbeam in the width direction, the limiting component one is located on one side of the crossbeam to be welded reinforcing block, the adjustment mechanism one presses the crossbeam toward the limiting component one, and the direction in which the crossbeam bends toward the limiting component one is the opposite deformation direction of the crossbeam, the adjustment mechanism one includes:

[0018] The mounting base is installed on the base plate;

[0019] A push block is mounted on a fixed base. The push block slides toward or away from the crossbeam and can slide until it abuts against the side wall of the crossbeam.

[0020] A drive assembly, mounted on a fixed base, is used to control the sliding of the push block.

[0021] By adopting the above technical solution, when adjusting the crossbeam against deformation, the crossbeam is placed on the support base so that one end of the crossbeam in the length direction abuts against the backing. Then, the reinforcing block is placed on the side of the crossbeam at the welding point and the reinforcing block is positioned and fixed by the positioning module. Then, the two ends of the crossbeam are fixed by the fixing and clamping module. Then, the crossbeam and the reinforcing block are welded together by the anti-deformation adjustment module. Finally, the crossbeam is adjusted against deformation in the middle by the auxiliary adjustment module. Since the crossbeam will bend and deform in the direction away from the reinforcing block after natural welding, the anti-deformation adjustment is performed in advance when positioning the crossbeam and the reinforcing block.

[0022] The 0.6mm / m torsional deformation generated during the fabrication of the crossbeam profile and the multi-directional internal stress after processing are integrated by the densely arranged anti-deformation fixtures under high heat after the crossbeam and reinforcing block are welded. After the crossbeam workpiece cools and sets, the shrinkage tension after welding pulls the crossbeam workpiece in the opposite direction, achieving thermal shaping. The anti-deformation amount offsets the cutting stress and local thermal deformation of the profile, thus straightening the workpiece and achieving the desired straightness of the welded product.

[0023] The above process solves the problem of correction work after welding deformation, saving a lot of manpower and eliminating the labor cost of the shaping process; it reduces the situation of scratching the workpiece after deformation correction, avoiding customer complaints; it eliminates the correction process and eliminates the noise of correction in the workshop; it solves the problem of industrial production, enabling in-line assembly production; and it solves the problem of frame assembly quality defects caused by the deformation of the profile itself due to bending, twisting and internal stress during processing.

[0024] Preferably, the anti-deformation adjustment modules are symmetrically located on both sides of the auxiliary adjustment modules. The anti-deformation adjustment modules are set according to the number and position of the reinforcing blocks, with one set of anti-deformation adjustment modules corresponding to one reinforcing block.

[0025] By adopting the above technical solution, an anti-deformation adjustment module is set according to the deformation position of the crossbeam in its natural state, and multiple deformation directions of the crossbeam workpiece are integrated in a targeted manner, so that the anti-deformation direction of the crossbeam workpiece can be oriented towards a specified unified direction, so as to ensure the anti-deformation effect and the final forming quality of the crossbeam workpiece after cooling.

[0026] Preferably, the driving component is located on the side of the push block away from the crossbeam. The driving component includes a guide block, a driving block, a driving bolt, and a mating block. The guide block is fixedly mounted on the fixed base. The driving block and the guide block are slidably connected and the driving block slides vertically. A first T-shaped block is provided at one end of the driving block in the length direction. A first T-shaped groove for the first T-shaped block to slide is provided on the guide block.

[0027] The drive block has a drive hole in the center for the drive bolt to pass through. The inner peripheral wall of the drive hole is provided with a contact step. The bottom surface of the nut of the drive bolt abuts against the top surface of the contact step. After passing through the drive block, the drive bolt passes into the fixing seat. The part of the drive bolt that passes into the fixing seat is threadedly connected to the fixing seat.

[0028] One side of the mating block is slidably connected to the driving block, and the other side of the mating block is connected to the limiting block and the pushing block. A second T-shaped block is provided at the end of the driving block away from the first T-shaped block in the length direction. A second T-shaped groove is provided on the mating block for the second T-shaped block to slide. The second T-shaped block is inclined. The part of the second T-shaped block away from the mating block is the bottom of the second T-shaped block. The shape of the second T-shaped groove is adapted to the shape of the second T-shaped block. When the driving block moves downward, the mating block moves toward the direction closer to the crossbeam.

[0029] The top surface of the fixed base is provided with a mounting ring groove, and a return spring is provided in the mounting ring groove. The bottom end of the return spring abuts against the inner bottom wall of the mounting ring groove, and the top end of the return spring abuts against the bottom surface of the drive block. The return spring is located outside the drive bolt. The mounting ring groove is not connected to the threaded hole at the drive bolt. The return spring applies a force to the drive block to make the drive block move upward.

[0030] By adopting the above technical solution, when it is necessary to adjust the crossbeam in the reverse deformation direction, the drive bolt of the fixed clamping module is rotated. Under the cooperation of the first T-block and the first T-slot, the corresponding drive block moves downward. At this time, the reset spring is compressed. Under the cooperation of the second T-block and the second T-slot, the cooperating block drives the push block to move towards the crossbeam to the designated position.

[0031] When the crossbeam needs to be loosened, rotate the drive bolt of the fixed clamping module in the opposite direction, and then lift the drive block upward. When the drive block needs to be reset upward, the reset spring provides support force to the drive block. Under the cooperation of the second T-block and the second T-slot, the cooperating block drives the push block to move away from the crossbeam until the crossbeam can be removed.

[0032] Under the weight of the push block, limit block, and mating block, as well as the downward pressure of the drive block on the mating block, the mating block moves stably along the top surface of the fixed seat. Under the supporting force provided by the return spring, the drive assembly remains stable and does not easily shift after moving, reducing the possibility that the drive block will slide down due to the weight of the drive block and the mating block will slide towards the crossbeam, thus affecting the removal of the crossbeam.

[0033] Preferably, the limiting component includes an L-shaped support base, which includes a horizontal section and a vertical section. A height adjusting pad and a height reference block are provided on the horizontal section. The height adjusting pad is disposed on the horizontal section and the height reference block is disposed on the top surface of the height adjusting pad. The height adjusting pad is composed of multiple adjusting pads stacked together. The height of the height reference block is adjusted by increasing or decreasing the number of adjusting pads. The bottom surface of the push block is in contact with the top surface of the height reference block.

[0034] By adopting the above technical solution, the height of the height reference block can be adjusted by increasing or decreasing the number of shims before positioning the crossbeam, so as to adapt to crossbeam workpieces of different specifications and improve the applicability of the anti-deformation tooling.

[0035] Preferably, the vertical section of the support base of the anti-deformation adjustment module and the auxiliary adjustment module is provided with a fine adjustment component for finely adjusting the deformation of the crossbeam. The fine adjustment component includes a deformation control block, a control bolt, and a set nut. The side of the deformation control block in the anti-deformation adjustment module away from the vertical section can be pressed against the reinforcing block, and the side of the deformation control block in the auxiliary adjustment module away from the vertical section can be pressed against the crossbeam.

[0036] In the fine adjustment component of the anti-deformation adjustment module, an elastic shim is provided between the vertical section and the deformation control block, and the elastic shim has a deformation.

[0037] When the push block does not counter-deform and tighten the crossbeam, there is a gap one between the deformation amount control block and the reinforcing block in the counter-deformation adjustment module, and a gap two between the deformation amount control block and the crossbeam in the auxiliary adjustment module.

[0038] The sum of the lengths of the first gap and the deformation of the elastic gasket is the specified anti-deformation length at the weld between the crossbeam and the reinforcing block; the length of the second gap is the specified anti-deformation length at the middle of the crossbeam.

[0039] The control bolt passes through the vertical section and is threadedly connected to the vertical section. After passing through the vertical section, the control bolt abuts against the deformation control block. The set nut is threadedly connected to the control bolt. After the deformation control block is positioned, the set nut rotates to abut against the side of the vertical section away from the deformation control block.

[0040] A guide rod is connected to the deformation control block. The end of the guide rod away from the deformation control block passes through the vertical section and is slidably connected to the vertical section. The guide rod is located on both sides of the control bolt in the radial direction.

[0041] By adopting the above technical solution, the fine adjustment component can perform further precise anti-deformation adjustment on the crossbeam to improve the accuracy of the anti-deformation amount, thereby improving the quality of the welded crossbeam workpiece.

[0042] If the anti-deformation amount is insufficient: When the remaining deformation of the elastic shim is sufficient, slightly rotate the drive bolt of the adjustment mechanism one until the anti-deformation amount of the crossbeam meets the standard; when the remaining deformation of the elastic shim is insufficient, loosen the set nut, rotate the control bolt according to the insufficient anti-deformation amount of the crossbeam, so that the deformation control block moves a suitable distance away from the crossbeam, and at the same time rotate the drive bolt at the corresponding position, so that the push block moves a suitable distance closer to the crossbeam, until the anti-deformation amount of the crossbeam meets the standard.

[0043] If the amount of anti-deformation is too much: slightly rotate the drive bolt of the drive adjustment mechanism to move the push block away from the crossbeam by a suitable distance, and at the same time rotate the control bolt in the corresponding position to move the deformation control block closer to the crossbeam by a suitable distance, until the amount of anti-deformation of the crossbeam reaches the standard.

[0044] Preferably, the fixed clamping module includes a second limiting component and a second adjusting mechanism. The second limiting component and the first limiting component have the same structure, and the second adjusting mechanism and the first adjusting mechanism have the same structure.

[0045] The vertical section of the support base of the second limiting component is provided with a fixing block and a longitudinal pressing component. The fixing block is fixedly installed on the side of the vertical section near the crossbeam by fixing shims. The longitudinal pressing component includes a pressing plate, a supporting screw, and a pressing bolt. The bottom surface of the pressing plate abuts against the top surface of the crossbeam. The bottom surface of the supporting screw is movably connected to the top surface of the base plate. The top end of the supporting screw passes through the pressing plate and is threadedly connected to the pressing plate.

[0046] The clamping plate has a movable hole for the clamping bolt to pass through. The clamping bolt passes through the movable hole and is movably connected to the clamping plate. The movable hole is an oblong hole. After passing through the clamping plate, the clamping bolt passes into the top of the vertical section of the support seat of the second limiting component. The clamping bolt is threadedly connected to the vertical section of the support seat of the second limiting component.

[0047] By adopting the above technical solution, before positioning and fixing the crossbeam, first rotate the support screw to adjust the height of the clamping plate so that the bottom surface of the clamping plate is flush with the top surface of the crossbeam. Before placing the crossbeam, slide the clamping plate along the movable hole until it does not obstruct the crossbeam from being placed on the support seat. After placing the crossbeam on the support seat, slide the clamping plate until the bottom surface of the clamping plate covers the top surface of the crossbeam in the width direction to restrict the crossbeam from moving up and down. Then, rotate the drive bolt of the fixed clamping module to make the corresponding push block move towards the crossbeam. The push block pushes the crossbeam along the width direction of the crossbeam until the side wall of the crossbeam abuts against the fixing block of the fixed clamping module. Finally, tighten the clamping bolt until the bottom surface of the clamping plate abuts against the top surface of the crossbeam.

[0048] Preferably, a fastening washer is provided between the nut of the clamping bolt and the top surface of the vertical section of the support seat of the second limiting component, and the nut of the clamping bolt is pressed against the top surface of the vertical section of the support seat of the second limiting component through the fastening washer.

[0049] By adopting the above technical solution, the fixing ability of the clamping plate on the crossbeam is improved.

[0050] Preferably, the positioning module includes a positioning block, the positioning block is 7-shaped, the positioning block includes a horizontal part and a vertical part, a positioning post is provided on the bottom surface of the horizontal part, at least two positioning posts are provided along the length direction of the positioning block, and a positioning hole for the positioning post to pass through is correspondingly opened on the top surface of the crossbeam.

[0051] The vertical part includes a first unit plate and a second unit plate. The first unit plate and the second unit plate are respectively connected to the two ends of the positioning block in the length direction. The length of the first unit plate is greater than the length of the second unit plate. The side of the first unit plate close to the second unit plate abuts against one end of the reinforcing block in the length direction. The bottom surface of the second unit plate abuts against the top of the reinforcing block.

[0052] By adopting the above technical solution, when positioning the reinforcing block, the positioning pin of the positioning block is inserted into the positioning hole at the corresponding position, and the side of the first unit plate close to the second unit plate abuts against one end of the reinforcing block in the length direction, and the bottom surface of the second unit plate abuts against the top of the reinforcing block.

[0053] Secondly, the anti-deformation method provided in this application includes the following steps:

[0054] S1. Positioning of the crossbeam and reinforcing block: Place the crossbeam on the support base so that one end of the crossbeam in the length direction abuts against the backing. Then place the reinforcing block at the welding point of the crossbeam so that the side wall of the reinforcing block abuts against the side wall of the crossbeam. At this time, the bottom surface of the crossbeam and the bottom surface of the reinforcing block are in contact with the top surface of the height reference block. Then insert the positioning pin of the positioning block into the positioning hole at the corresponding position, and make the side of the first unit plate close to the second unit plate abut against one end of the reinforcing block in the length direction, and the bottom surface of the second unit plate abut against the top of the reinforcing block.

[0055] S2. Beam fixing: Operate the fixing and clamping modules at both ends of the beam length direction in sequence. During operation, first rotate the drive bolt of the fixing and clamping module to make the corresponding push block move towards the beam. The push block pushes the beam along the width direction of the beam until the side wall of the beam abuts against the fixing block of the fixing and clamping module.

[0056] Adjust the height of the clamping plate according to the height of the top surface of the crossbeam until the bottom surface of the clamping plate is flush with the top surface of the crossbeam. Then slide the support screw of the longitudinal clamping assembly until the plate surface of the clamping plate covers the top surface of the crossbeam in the width direction. Then tighten the clamping bolts until the bottom surface of the clamping plate and the top surface of the crossbeam abut.

[0057] S3. Initial Adjustment of Crossbeam Anti-deformation: First, perform anti-deformation adjustment at the weld between the crossbeam and the reinforcing block. During operation, rotate the drive bolt of the anti-deformation adjustment module to move the corresponding push block towards the crossbeam. The movement distance of the push block here is the length of gap one. The push block pushes the crossbeam along the width direction of the crossbeam until the reinforcing block and the deformation control block of the anti-deformation adjustment module are in contact. At this time, the reinforcing block cannot move freely. Remove the positioning block, and then continue to rotate the drive bolt of the anti-deformation adjustment module to move the corresponding push block towards the crossbeam. The movement distance of the push block here is the deformation length of the elastic pad. The push block pushes the crossbeam along the width direction of the crossbeam until the reinforcing block and the deformation control block of the anti-deformation adjustment module are in close contact.

[0058] Next, the middle part of the crossbeam is adjusted to reverse deformation. During operation, the drive bolt of the auxiliary adjustment module is rotated so that the corresponding push block moves toward the crossbeam. The moving distance of the push block here is the length of gap two. The push block pushes the crossbeam along the width direction of the crossbeam until it is directly in contact with the deformation control block of the auxiliary adjustment module.

[0059] S4. Fine adjustment of crossbeam anti-deformation: Based on the specified anti-deformation amount required at each part of the crossbeam, measure whether the current bending deformation amount meets the standard. If it meets the standard, no further adjustment is needed; if it does not meet the standard, adjust it again. When the adjustment amount to be made at the non-compliant part is between 1-3mm, perform welding adjustment with a displacement of 1mm each time. When the adjustment amount to be made at the non-compliant part is between 0.1-0.9mm, perform welding adjustment with a displacement of 0.3-0.5mm each time, until the quality measurement data is normally distributed and qualified.

[0060] If the amount of anti-deformation is insufficient: loosen the set nut, rotate the control bolt according to the amount of anti-deformation of the crossbeam, so that the deformation control block moves a suitable distance away from the crossbeam, and at the same time rotate the drive bolt in the corresponding position so that the push block moves a suitable distance closer to the crossbeam, until the amount of anti-deformation of the crossbeam meets the standard.

[0061] If the amount of anti-deformation is too much: slightly rotate the drive bolt of the drive adjustment mechanism to move the push block away from the crossbeam by a suitable distance, and at the same time rotate the control bolt in the corresponding position to move the deformation control block closer to the crossbeam by a suitable distance, until the amount of anti-deformation of the crossbeam reaches the standard.

[0062] In summary, this application includes at least one of the following beneficial technical effects:

[0063] 1. By using this anti-deformation tooling, the product achieves a 100% first-time welding pass rate;

[0064] 2. Solved the problem of high-precision deformation control of the heat deformation surface profile of long crossbeam workpieces after welding, achieving a thickness of 0.4mm;

[0065] 3. It solves the problem of correction work after welding deformation in the early stage, saves a lot of manpower, and eliminates the labor cost of the shaping process;

[0066] 4. Eliminate the straightening process to avoid scratching the workpiece after deformation during straightening, thus avoiding customer complaints;

[0067] 5. Eliminating the straightening process reduces noise from the straightening workshop;

[0068] 6. It solves the problem of industrialized production and enables in-line assembly line production;

[0069] 7. Achieve precise control and adjustment of anti-deformation;

[0070] 8. It solved the problem of substandard frame assembly quality caused by deformation of the profiles themselves due to bending, twisting and internal stress during processing. Attached Figure Description

[0071] Figure 1 This is a schematic diagram of the overall structure of the anti-deformation tooling in the embodiments of this application.

[0072] Figure 2 This is a structural schematic diagram used in the embodiments of this application to illustrate the anti-deformation adjustment module and the auxiliary adjustment module.

[0073] Figure 3 This is a structural schematic diagram used to illustrate the fixed clamping module in the embodiments of this application.

[0074] Figure 4 This is a structural schematic diagram used to illustrate the positioning module in the embodiments of this application.

[0075] Figure 5 This is a comparison diagram used in the embodiments of this application to show the effect of the beam after being adjusted by reverse deformation.

[0076] Explanation of reference numerals in the attached drawings: 1. Crossbeam; 11. Reinforcing block; 2. Base plate; 21. Backing; 22. Positioning block; 221. Horizontal part; 2211. Positioning column; 2212. Positioning hole; 222. Vertical part; 2221. First unit plate; 2222. Second unit plate; 3. Fixed clamping module; 31. Limiting component two; 311. Fixed block; 32. Adjusting mechanism two; 33. Longitudinal clamping component; 331. Clamping plate; 332. Support screw; 333. Clamping bolt; 334. Movable hole; 335. Fastening shim; 4. Anti-deformation adjustment module; 5. Auxiliary adjustment module; 6. Limiting component one; 61. Support seat; 611. Horizontal 612. Vertical section; 62. Height adjustment pad; 63. Height reference block; 7. Adjustment mechanism one; 71. Fixed seat; 72. Push block; 73. Drive assembly; 731. Guide block; 7311. First T-slot; 732. Drive block; 7321. First T-block; 7322. Second T-block; 733. Drive bolt; 7331. Drive hole; 7332. Contact step; 734. Mating block; 7341. Second T-slot; 735. Limiting block; 736. Return spring; 8. Fine adjustment assembly; 81. Deformation control block; 811. Elastic shim; 82. Control bolt; 83. Set nut; 84. Guide rod. Detailed Implementation

[0077] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0078] This application discloses an anti-deformation tooling and method for welding the crossbeam of a new energy battery pack.

[0079] Firstly, referring to Figure 1 The anti-deformation fixture for welding the crossbeam of a new energy battery pack includes a base plate 2, a support 21, a positioning module, a fixing and clamping module 3, an anti-deformation adjustment module 4, and an auxiliary adjustment module 5. The support 21 is fixed to one end of the base plate 2 along its length and is used to position one end of the crossbeam 1 along its length. When the end of the crossbeam 1 abuts against the support 21, the crossbeam 1 is in its correct position along its length. The positioning module is used to position the reinforcing block 11. The fixing and clamping module 3 is used to fix both ends of the crossbeam 1 along its length. The anti-deformation adjustment module 4 is used to adjust the welding position between the crossbeam 1 and the reinforcing block 11 using anti-deformation adjustment. The auxiliary adjustment module 5 is used to adjust the middle part of the crossbeam 1 along its length using anti-deformation adjustment.

[0080] Reference Figure 1 and Figure 2Both the anti-deformation adjustment module 4 and the auxiliary adjustment module 5 include a limiting component 6 and an adjustment mechanism 7. The limiting component 6 is used to position the crossbeam 1 in the width direction. The adjustment mechanism 7 is used to press the crossbeam 1 towards the limiting component 6. The adjustment mechanism 7 and the limiting component 6 are located on both sides of the crossbeam 1 in the width direction. The limiting component 6 is located on one side of the crossbeam 1 to be welded to the reinforcing block 11. Since in actual operation, after the crossbeam 1 is welded to the reinforcing block 11, the crossbeam 1 will bend and deform in the direction away from the reinforcing block 11. Therefore, the direction in which the crossbeam 1 bends towards the limiting component 6 is the anti-deformation direction of the crossbeam 1.

[0081] Reference Figure 1 and Figure 2 The adjustment mechanism 7 includes a fixed base 71, a push block 72, and a drive assembly 73. The fixed base 71 is fixed to the base plate 2. The push block 72 is disposed on the fixed base 71 and slides towards or away from the crossbeam 1. The push block 72 can slide to abut against the side wall of the crossbeam 1. The drive assembly 73 is disposed on the fixed base 71 and is used to control the sliding of the push block 72.

[0082] When adjusting the crossbeam 1 in reverse deformation, place the crossbeam 1 on the support base 61 so that one end of the crossbeam 1 in the length direction abuts against the backrest 21. Then, place the reinforcing block 11 on the side of the crossbeam 1 to be welded and fix the reinforcing block 11 by the positioning module. Then, fix both ends of the crossbeam 1 by the fixing and clamping module 3. Then, adjust the weld between the crossbeam 1 and the reinforcing block 11 in reverse deformation by the reverse deformation adjustment module 4. Since the crossbeam 1 will bend and deform in the direction away from the reinforcing block 11 after natural welding, the crossbeam 1 should be adjusted in reverse deformation in advance in the direction close to the limiting component 6 when positioning the crossbeam 1 and the reinforcing block 11.

[0083] The 0.6mm / m torsional deformation generated during the fabrication of the crossbeam 1 profile and the multi-directional internal stress after the crossbeam 1 profile is processed are integrated by the densely arranged anti-deformation fixtures under the high-heat state of the crossbeam 1 workpiece after welding with the reinforcing block 11. After the crossbeam 1 workpiece cools down and is shaped, the shrinkage tension after welding pulls the crossbeam 1 workpiece in the opposite direction, realizing thermal shaping and offsetting the anti-deformation amount with the profile cutting stress and local thermal deformation amount, thereby straightening the workpiece and achieving the effect of qualified straightness of the product after welding.

[0084] The above process solves the problem of correcting deformation after welding, saving a lot of manpower and eliminating the labor cost of the shaping process; it eliminates the need for the correction process, avoiding the situation of workpiece scratches after deformation, avoiding customer complaints, and eliminating the noise of correction in the workshop; it solves the problem of industrial production, enabling in-line assembly line production; and it solves the problem of frame assembly quality defects caused by the deformation of the profile itself due to bending, twisting and internal stress during processing.

[0085] Reference Figure 1 The anti-deformation adjustment module 4 is symmetrically located on both sides of the auxiliary adjustment module 5. The anti-deformation adjustment module 4 is set according to the number and position of the reinforcing blocks 11, with one set of anti-deformation adjustment modules 4 corresponding to each reinforcing block 11. The anti-deformation adjustment module 4 is set according to the deformation position of the crossbeam 1 in its natural state, and the multiple deformation directions of the crossbeam 1 workpiece are integrated in a targeted manner, so that the anti-deformation direction of the crossbeam 1 workpiece can be oriented in a specified unified direction, so as to ensure the anti-deformation effect and the final forming quality of the crossbeam 1 workpiece after cooling.

[0086] Reference Figure 1 and Figure 2 The drive assembly 73 is located on the side of the push block 72 away from the crossbeam 1. The drive assembly 73 includes a guide block 731, a drive block 732, a drive bolt 733, and a mating block 734. The guide block 731 is fixedly mounted on the fixed base 71. The drive block 732 and the guide block 731 are slidably connected and the drive block 732 slides vertically. A first T-shaped block 7321 is provided at one end of the drive block 732 in the length direction. A first T-shaped groove 7311 is provided on the guide block 731 for the first T-shaped block 7321 to slide.

[0087] The center of the drive block 732 has a drive hole 7331 through which the drive bolt 733 passes. The inner peripheral wall of the drive hole 7331 has an integrally formed contact step 7332. The bottom surface of the contact step 7332 is flush with the bottom surface of the drive block 732. The bottom surface of the nut of the drive bolt 733 abuts against the top surface of the contact step 7332. After passing through the drive block 732, the drive bolt 733 passes into the fixing seat 71. The part of the drive bolt 733 that passes into the fixing seat 71 is threadedly connected to the fixing seat 71.

[0088] One side of the mating block 734 is slidably connected to the driving block 732, and the other side of the mating block 734 is connected to the push block 72 via the limiting block 735. A second T-shaped block 7322 is provided at the end of the driving block 732 away from the first T-shaped block 7321 in the length direction. A second T-shaped groove 7341 for sliding of the second T-shaped block 7322 is provided on the mating block 734. The second T-shaped block 7322 is inclined. The part of the second T-shaped block 7322 that is farthest from the mating block 734 is the bottom of the second T-shaped block 7322. The shape of the second T-shaped groove 7341 is adapted to the shape of the second T-shaped block 7322. When the driving block 732 moves downward, the mating block 734 moves toward the direction close to the crossbeam 1.

[0089] A mounting ring groove is provided on the top surface of the fixed base 71. A return spring 736 is provided in the mounting ring groove. The bottom end of the return spring 736 abuts against the inner bottom wall of the mounting ring groove, and the top end of the return spring 736 abuts against the bottom surface of the drive block 732. The return spring 736 is located outside the drive bolt 733. The mounting ring groove is not connected to the threaded hole at the drive bolt 733. The return spring 736 applies a force to the drive block 732 to make the drive block 732 move upward.

[0090] When the crossbeam 1 needs to be adjusted to reverse deformation, rotate the drive bolt 733 of the fixing and clamping module 3. Under the action of the first T-block 7321 and the first T-slot 7311, the corresponding drive block 732 moves downward, and the return spring 736 is compressed. Under the action of the second T-block 7322 and the second T-slot 7341, the mating block 734 drives the push block 72 to move towards the crossbeam 1 to the designated position. When the crossbeam 1 needs to be loosened, rotate the drive bolt 733 of the fixing and clamping module 3 in the opposite direction, and then lift the drive block 732 upward. The return spring also assists in lifting the drive block 732 upward, helping the drive block 732 to return to its original position. Under the action of the second T-block 7322 and the second T-slot 7341, the mating block 734 drives the push block 72 to move away from the crossbeam 1 until the crossbeam 1 can be removed.

[0091] Under the weight of the push block 72, the limit block 735, and the mating block 734, as well as the downward pressure of the drive block 732 on the mating block 734, the mating block 734 moves stably along the top surface of the fixed seat 71. Under the support force provided by the return spring 736, the drive assembly 73 remains stable and does not easily shift after moving, reducing the possibility that the drive block 732 will slide down due to the weight of the drive block 732 and the mating block 734 will slide towards the crossbeam 1, thus affecting the removal of the crossbeam 1.

[0092] Reference Figure 1 and Figure 2 The limiting component 6 includes an L-shaped support base 61, which is fixedly mounted on the base plate 2. The support base 61 includes a horizontal section 611 and a vertical section 612. A height adjusting pad 62 and a height reference block 63 are provided on the horizontal section 611. The height adjusting pad 62 is located on the horizontal section 611, and the height reference block 63 is located on the top surface of the height adjusting pad 62. The height adjusting pad 62 is composed of multiple stacked adjusting pads. The height of the height reference block 63 is adjusted by increasing or decreasing the number of adjusting pads. The bottom surface of the push block 72 contacts the top surface of the height reference block 63. Before positioning the crossbeam 1, the height of the height reference block 63 is adjusted by increasing or decreasing the number of adjusting pads to accommodate crossbeam 1 workpieces of different specifications, thus improving the applicability of the anti-deformation tooling.

[0093] Reference Figure 2The vertical section 612 of the support base 61 of the anti-deformation adjustment module 4 and the auxiliary adjustment module 5 is provided with a fine adjustment component 8 for fine adjustment of the deformation of the crossbeam 1. The fine adjustment component 8 includes a deformation control block 81, a control bolt 82, and a set nut 83. The side of the deformation control block 81 in the anti-deformation adjustment module 4 away from the vertical section 612 can be pressed against the reinforcing block 11, and the side of the deformation control block 81 in the auxiliary adjustment module 5 away from the vertical section 612 can be pressed against the crossbeam 1.

[0094] In the fine adjustment component 8 of the anti-deformation adjustment module 4, an elastic shim 811 is provided between the vertical section 612 and the deformation control block 81 to enhance the control of the anti-deformation amount. The elastic shim 811 has a clearance hole for the control bolt 82 to pass through. The elastic shim 811 has a deformation; in this embodiment, the deformation of the elastic shim 811 is 3 mm.

[0095] When the push block 72 does not counter-deform and tighten the crossbeam 1, there is a gap 1 between the deformation control block 81 and the reinforcing block 11 in the anti-deformation adjustment module 4. In this embodiment, the length of the gap 1 is 1mm. There is a gap 2 between the deformation control block 81 and the crossbeam 1 in the auxiliary adjustment module 5. The length of the gap 2 is 1mm greater than the sum of the deformation of the gap 1 and the elastic pad 811.

[0096] The sum of the lengths of gap one and the deformation of the elastic gasket 811 is the specified anti-deformation length at the weld between the crossbeam 1 and the reinforcing block 11. In this embodiment, the total specified anti-deformation length at the weld of the reinforcing block 11 is 4mm, which means that the product's profile is within the required range of 0.4mm after welding. The length of gap two is the specified anti-deformation length of the middle part of the crossbeam 1. In this embodiment, the specified anti-deformation length of the middle part of the crossbeam 1 is 5mm.

[0097] The control bolt 82 passes through the vertical section 612 and is threadedly connected to the vertical section 612. After passing through the vertical section 612, the control bolt 82 abuts against the deformation control block 81. The set nut 83 is threadedly connected to the control bolt 82. After the deformation control block 81 is positioned, the set nut 83 rotates to abut against the side of the vertical section 612 away from the deformation control block 81.

[0098] A guide rod 84 is connected to the deformation control block 81. The end of the guide rod 84 away from the deformation control block 81 passes through the vertical section 612 and is slidably connected to the vertical section 612. The guide rod 84 is located on both sides of the control bolt 82 in the radial direction.

[0099] The fine adjustment component 8 can perform further precise anti-deformation adjustment on the crossbeam 1 to improve the accuracy of the anti-deformation amount, thereby improving the quality of the welded crossbeam 1 workpiece.

[0100] If the amount of anti-deformation is insufficient: loosen the set nut 83, rotate the control bolt 82 according to the insufficient amount of anti-deformation of the crossbeam 1, so that the deformation control block 81 moves a suitable distance away from the crossbeam 1, and at the same time rotate the drive bolt 733 at the corresponding position, so that the push block 72 moves a suitable distance closer to the crossbeam 1, until the amount of anti-deformation of the crossbeam 1 meets the standard.

[0101] If the amount of anti-deformation is too much: slightly rotate the drive bolt 733 of the drive adjustment mechanism 7 to move the push block 72 away from the crossbeam 1 by a suitable distance, and at the same time rotate the control bolt 82 at the corresponding position to move the deformation control block 81 towards the crossbeam 1 by a suitable distance, until the amount of anti-deformation of the crossbeam 1 reaches the standard.

[0102] Reference Figure 1-3 The fixed clamping module 3 includes a second limiting component 31 and a second adjusting mechanism 32. The second limiting component 31 and the first limiting component 6 have the same structure, and the second adjusting mechanism 32 and the first adjusting mechanism 7 have the same structure.

[0103] The support base 61 of the limiting component 2 31 is provided with a fixing block 311 and a longitudinal clamping component 33 on the vertical section 612. The fixing block 311 is fixedly installed on the side of the vertical section 612 near the crossbeam 1 by fixing gaskets 312, and the side wall of the crossbeam 1 abuts against the fixing block 311. The longitudinal clamping component 33 includes a clamping plate 331, a support screw 332, and a clamping bolt 333. The bottom surface of the clamping plate 331 abuts against the top surface of the crossbeam 1, the bottom surface of the support screw 332 is movably connected to the top surface of the base plate 2, and the top end of the support screw 332 passes through the clamping plate 331 and is threadedly connected to the clamping plate 331.

[0104] The clamping plate 331 has a movable hole 334 for the clamping bolt 333 to pass through. The clamping bolt 333 passes through the movable hole 334 and is movably connected to the clamping plate 331. The movable hole 334 is an oblong hole. After passing through the clamping plate 331, the clamping bolt 333 passes into the top of the vertical section 612 of the support seat 61 of the second limiting component 31. The clamping bolt 333 is threadedly connected to the vertical section 612 of the support seat 61 of the second limiting component 31.

[0105] A fastening washer 335 is provided between the nut of the clamping bolt 333 and the top surface of the vertical section 612 of the support seat 61 of the second limiting component 31. The nut of the clamping bolt 333 is tightened by the fastening washer 335 and the top surface of the vertical section 612 of the support seat 61 of the second limiting component 31, thereby improving the fixing ability of the clamping plate 331 to the crossbeam 1.

[0106] Before positioning and fixing the crossbeam 1, first rotate the support screw 332 to adjust the height of the clamping plate 331 so that the bottom surface of the clamping plate 331 is flush with the top surface of the crossbeam 1. Before placing the crossbeam 1, slide the clamping plate 331 along the movable hole 334 until it does not obstruct the crossbeam 1 from being placed on the support base 61. After placing the crossbeam 1 on the support base 61, slide the clamping plate 331 until the bottom surface of the clamping plate 331 covers the top surface of the crossbeam 1 in the width direction, so as to restrict the crossbeam 1 from moving up and down. Then rotate the drive bolt 733 of the fixing clamping module 3 so that the corresponding push block 72 moves toward the crossbeam 1. The push block 72 pushes the crossbeam 1 along the width direction of the crossbeam 1 until the side wall of the crossbeam 1 abuts against the fixing block 311 of the fixing clamping module 3. Finally, tighten the clamping bolt 333 until the bottom surface of the clamping plate 331 abuts against the top surface of the crossbeam 1, thus fixing the crossbeam 1.

[0107] Reference Figure 4 The positioning module includes several positioning blocks 22, which are 7-shaped. Each positioning block 22 includes a horizontal part 221 and a vertical part 222. A positioning post 2211 is provided on the bottom surface of the horizontal part 221. At least two positioning posts 2211 are provided along the length direction of the positioning block 22. A positioning hole 2212 for the positioning post 2211 to pass through is correspondingly opened on the top surface of the crossbeam 1. The vertical part 222 includes a first unit plate 2221 and a second unit plate 2222. The first unit plate 2221 and the second unit plate 2222 are respectively connected to the two ends of the positioning block 22 along the length direction. The length of the first unit plate 2221 is greater than the length of the second unit plate 2222. The side of the first unit plate 2221 closest to the second unit plate 2222 abuts against one end of the reinforcing block 11 along the length direction. The bottom surface of the second unit plate 2222 abuts against the top of the reinforcing block 11. When positioning the reinforcing block 11, the positioning post 2211 of the positioning block 22 is inserted into the positioning hole 2212 at the corresponding position, and the side of the first unit plate 2221 close to the second unit plate 2222 abuts against one end of the reinforcing block 11 in the length direction, and the bottom surface of the second unit plate 2222 abuts against the top of the reinforcing block 11.

[0108] The implementation principle of the anti-deformation tooling for welding the crossbeam of a new energy battery pack in this embodiment is as follows:

[0109] Before welding the crossbeam 1 and the reinforcing block 11, the crossbeam 1 and the reinforcing block 11 are positioned and the crossbeam 1 is adjusted to reverse deformation. When adjusting the crossbeam 1 to reverse deformation, the crossbeam 1 is placed on the support 61 so that one end of the crossbeam 1 in the length direction abuts against the backrest 21. Then, the reinforcing block 11 is placed on the side of the crossbeam 1 at the welding point and the reinforcing block 11 is positioned and fixed by the positioning module. Then, the two ends of the crossbeam 1 are fixed by the fixing and clamping module 3. Then, the crossbeam 1 and the reinforcing block 11 are adjusted to reverse deformation by the welding point of the crossbeam 1 and the reinforcing block 11 by the reverse deformation adjustment module 4. Then, the crossbeam 1 at the reverse deformation adjustment module 4 is finely adjusted by the fine adjustment component 8. Finally, the crossbeam 1 in the middle is adjusted to reverse deformation by the auxiliary adjustment module 5.

[0110] When welding the reinforcing block 11 and the crossbeam 1, first weld the left side weld of the reinforcing block 11 at the left end of the crossbeam 1, then weld the right side weld of the reinforcing block 11 at the right end of the crossbeam 1, then weld the right side weld of the reinforcing block 11 at the left end of the crossbeam 1, then weld the left side weld of the reinforcing block 11 at the right end of the crossbeam 1, then weld the top weld of the reinforcing block 11 at the left end of the crossbeam 1, then weld the top weld of the reinforcing block 11 at the right end of the crossbeam 1. Finally, release the positioning clamp of the anti-deformation fixture, flip the crossbeam 1 so that the reinforcing block 11 is above the crossbeam 1, and then perform anti-deformation positioning clamp on the crossbeam 1 and reinforcing block 11 assembly again. Then weld the bottom weld of the reinforcing block 11 at the left end of the crossbeam 1, then weld the bottom weld of the reinforcing block 11 at the right end of the crossbeam 1, and perform welding in this alternating order.

[0111] Secondly, the anti-deformation method includes the following steps:

[0112] S1. Positioning of crossbeam 1 and reinforcing block 11: Place crossbeam 1 on support base 61, so that one end of crossbeam 1 in the length direction abuts against backing 21. Then place reinforcing block 11 at the welding point of crossbeam 1, so that the side wall of reinforcing block 11 abuts against the side wall of crossbeam 1. At this time, the bottom surface of crossbeam 1 and the bottom surface of reinforcing block 11 are in contact with the top surface of height reference block 63. Then, the positioning post 2211 of positioning block 22 is inserted into the positioning hole 2212 at the corresponding position, and the side of first unit plate 2221 close to second unit plate 2222 abuts against one end of reinforcing block 11 in the length direction, and the bottom surface of second unit plate 2222 abuts against the top of reinforcing block 11.

[0113] S2, fixing the crossbeam 1: operate the fixing and clamping modules 3 at both ends of the crossbeam 1 in sequence. During operation, first rotate the drive bolt 733 of the fixing and clamping module 3 so that the corresponding push block 72 moves toward the crossbeam 1. The push block 72 pushes the crossbeam 1 along the width direction of the crossbeam 1 until the side wall of the crossbeam 1 abuts against the fixing block 311 of the fixing and clamping module 3.

[0114] Adjust the height of the clamping plate 331 according to the height of the top surface of the crossbeam 1 until the bottom surface of the clamping plate 331 is flush with the top surface of the crossbeam 1. Then slide the support screw 332 of the longitudinal clamping assembly 33 until the plate surface of the clamping plate 331 covers the top surface of the crossbeam 1 in the width direction. Then tighten the clamping bolt 333 until the bottom surface of the clamping plate 331 and the top surface of the crossbeam 1 abut.

[0115] S3. Initial adjustment of crossbeam 1 against deformation: First, adjust the welding joint between crossbeam 1 and reinforcing block 11 against deformation. During operation, rotate the drive bolt 733 of the anti-deformation adjustment module 4 to move the corresponding push block 72 toward the crossbeam 1. The distance the push block 72 moves is the length of gap one. The push block 72 pushes the crossbeam 1 along the width direction of the crossbeam 1 until the reinforcing block 11 and the deformation control block 81 of the anti-deformation adjustment module 4 are in contact. At this time, the reinforcing block 11 cannot move freely. Remove the positioning block 22, and then continue to rotate the drive bolt 733 of the anti-deformation adjustment module 4 to move the corresponding push block 72 toward the crossbeam 1. The distance the push block 72 continues to move is the deformation length of the elastic pad 811. The push block 72 pushes the crossbeam 1 along the width direction of the crossbeam 1 until the reinforcing block 11 and the deformation control block 81 of the anti-deformation adjustment module 4 are in close contact.

[0116] Next, the middle part of the crossbeam 1 is adjusted by reverse deformation. During operation, the drive bolt 733 of the auxiliary adjustment module 5 is rotated so that the corresponding push block 72 moves toward the crossbeam 1. The moving distance of the push block 72 is the length of the gap 2. The push block 72 pushes the crossbeam 1 along the width direction of the crossbeam 1 until it is directly in contact with the deformation control block 81 of the auxiliary adjustment module 5.

[0117] S4. Fine adjustment of crossbeam 1's anti-deformation: Based on the specified anti-deformation amount required at each point of crossbeam 1, measure whether the current bending deformation amount meets the standard. If it meets the standard, no further adjustment is needed; if it does not meet the standard, adjust it again. When the amount to be adjusted at the point that does not meet the standard is between 1-3mm, perform welding adjustments with a displacement of 1mm each time. When the amount to be adjusted at the point that does not meet the standard is between 0.1-0.9mm, perform welding adjustments with a displacement of 0.3-0.5mm each time, until the quality measurement data is normally distributed and qualified.

[0118] If the amount of anti-deformation is insufficient: loosen the set nut 83, rotate the control bolt 82 according to the insufficient amount of anti-deformation of the crossbeam 1, so that the deformation control block 81 moves a suitable distance away from the crossbeam 1, and at the same time rotate the drive bolt 733 at the corresponding position, so that the push block 72 moves a suitable distance closer to the crossbeam 1, until the amount of anti-deformation of the crossbeam 1 meets the standard.

[0119] If the amount of anti-deformation is too much: slightly rotate the drive bolt 733 of the drive adjustment mechanism 7 to move the push block 72 away from the crossbeam 1 by a suitable distance, and at the same time rotate the control bolt 82 at the corresponding position to move the deformation control block 81 towards the crossbeam 1 by a suitable distance, until the amount of anti-deformation of the crossbeam 1 reaches the standard.

[0120] For a crossbeam 1 workpiece with a length of 1310mm, it is possible to achieve high-precision deformation control with a heat deformation surface profile of 0.4mm after welding.

[0121] 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 tooling for anti-deformation welding of crossbeams of new energy battery packs, characterized in that, include: Base plate (2); The backing (21) is fixed to one end of the base plate (2) along the length direction and is used to position one end of the crossbeam (1) along the length direction. A positioning module is used to position the reinforcing block (11); The fixed clamping module (3) is used to fix both ends of the crossbeam (1) in the length direction; The anti-deformation adjustment module (4) is used to adjust the welding position of the crossbeam (1) and the reinforcing block (11) in the opposite deformation manner; The auxiliary adjustment module (5) is used to perform anti-deformation adjustment on the middle part of the crossbeam (1) in the length direction; Both the anti-deformation adjustment module (4) and the auxiliary adjustment module (5) include: Limiting component 1 (6) is used to position the crossbeam (1) in the width direction; Adjustment mechanism 1 (7), wherein the adjustment mechanism 1 (7) and the limiting component 1 (6) are located on both sides of the width direction of the crossbeam (1), the limiting component 1 (6) is located on one side of the reinforcing block (11) to be welded to the crossbeam (1), the adjustment mechanism 1 (7) presses the crossbeam (1) toward the limiting component 1 (6), the bending direction of the crossbeam (1) toward the limiting component 1 (6) is the opposite deformation direction of the crossbeam (1), the adjustment mechanism 1 (7) includes: A fixed base (71) is mounted on the base plate (2); Push block (72) is provided on fixed base (71). Push block (72) slides toward the direction of approaching or away from crossbeam (1). Push block (72) can slide to abut against the side wall of crossbeam (1). A drive assembly (73) is disposed on a fixed base (71), the drive assembly (73) being used to control the sliding of the push block (72); The positioning module includes a positioning block (22), which is 7-shaped. The positioning block (22) includes a horizontal part (221) and a vertical part (222). A positioning post (2211) is provided on the bottom surface of the horizontal part (221). At least two positioning posts (2211) are provided along the length direction of the positioning block (22). A positioning hole (2212) for the positioning post (2211) to pass through is correspondingly opened on the top surface of the crossbeam (1). The vertical part (222) includes a first unit plate (2221) and a second unit plate (2222). The first unit plate (2221) and the second unit plate (2222) are respectively connected to the two ends of the positioning block (22) in the length direction. The length of the first unit plate (2221) is greater than the length of the second unit plate (2222). The side of the first unit plate (2221) close to the second unit plate (2222) abuts against one end of the reinforcing block (11) in the length direction. The bottom surface of the second unit plate (2222) abuts against the top of the reinforcing block (11).

2. The anti-deformation tooling for welding the crossbeam of a new energy battery pack according to claim 1, characterized in that: The anti-deformation adjustment module (4) is symmetrically located on both sides of the auxiliary adjustment module (5). The anti-deformation adjustment module (4) is set according to the number and position of the reinforcing blocks (11), with one set of the anti-deformation adjustment module (4) corresponding to one reinforcing block (11).

3. The anti-deformation tooling for welding the crossbeam of a new energy battery pack according to claim 2, characterized in that: The drive assembly (73) is located on the side of the push block (72) away from the crossbeam (1). The drive assembly (73) includes a guide block (731), a drive block (732), a drive bolt (733), and a mating block (734). The guide block (731) is fixedly mounted on the fixed base (71). The drive block (732) and the guide block (731) are slidably connected, and the drive block (732) slides vertically. A first T-shaped block (7321) is provided at one end of the drive block (732) in the length direction. A first T-shaped groove (7311) is provided on the guide block (731) for the first T-shaped block (7321) to slide. The center of the drive block (732) is provided with a drive hole (7331) for the drive bolt (733) to pass through. The inner peripheral wall of the drive hole (7331) is provided with a contact step (7332). The bottom surface of the nut of the drive bolt (733) abuts against the top surface of the contact step (7332). After passing through the drive block (732), the drive bolt (733) passes into the fixing seat (71). The part of the drive bolt (733) that passes into the fixing seat (71) is threadedly connected to the fixing seat (71). One side of the mating block (734) is slidably connected to the driving block (732), and the other side of the mating block (734) is connected to the push block (72) through the limiting block (735). A second T-shaped block (7322) is provided at the end of the driving block (732) away from the first T-shaped block (7321) in the length direction. A second T-shaped groove (7341) for sliding of the second T-shaped block (7322) is provided on the mating block (734). The second T-shaped block (7322) is inclined. The part of the second T-shaped block (7322) that is farthest from the mating block (734) is the bottom of the second T-shaped block (7322). The shape of the second T-shaped groove (7341) is adapted to the shape of the second T-shaped block (7322). When the driving block (732) moves downward, the mating block (734) moves toward the direction close to the crossbeam (1). The top surface of the fixed base (71) is provided with an installation ring groove, and a return spring (736) is provided in the installation ring groove. The bottom end of the return spring (736) abuts against the inner bottom wall of the installation ring groove, and the top end of the return spring (736) abuts against the bottom surface of the drive block (732). The return spring (736) is located outside the drive bolt (733). The installation ring groove is not connected to the threaded hole at the drive bolt (733). The return spring (736) applies a force to the drive block (732) to make the drive block (732) move upward.

4. The anti-deformation tooling for welding the crossbeam of a new energy battery pack according to claim 3, characterized in that: The limiting component 1 (6) includes an L-shaped support base (61), which includes a horizontal section (611) and a vertical section (612). The horizontal section (611) is provided with a height adjustment pad (62) and a height reference block (63). The height adjustment pad (62) is located on the horizontal section (611) and the height reference block (63) is located on the top surface of the height adjustment pad (62). The height adjustment pad (62) is composed of multiple adjustment pads stacked together. The height of the height reference block (63) is adjusted by increasing or decreasing the number of adjustment pads. The bottom surface of the push block (72) is in contact with the top surface of the height reference block (63).

5. The anti-deformation tooling for welding the crossbeam of a new energy battery pack according to claim 4, characterized in that: The vertical section (612) of the support base (61) of the anti-deformation adjustment module (4) and the auxiliary adjustment module (5) is provided with a fine adjustment component (8) for fine adjustment of the deformation of the crossbeam (1). The fine adjustment component (8) includes a deformation control block (81), a control bolt (82), and a set nut (83). The side of the deformation control block (81) in the anti-deformation adjustment module (4) away from the vertical section (612) can be pressed against the reinforcing block (11). The side of the deformation control block (81) in the auxiliary adjustment module (5) away from the vertical section (612) can be pressed against the crossbeam (1). In the fine adjustment component (8) of the anti-deformation adjustment module (4), an elastic shim (811) is provided between the vertical section (612) and the deformation control block (81), and the elastic shim (811) has a deformation. When the push block (72) does not perform anti-deformation clamping on the crossbeam (1), there is a gap between the deformation amount control block (81) in the anti-deformation adjustment module (4) and the reinforcing block (11), and there is a gap between the deformation amount control block (81) in the auxiliary adjustment module (5) and the crossbeam (1). The sum of the lengths of the first gap and the deformation of the elastic pad (811) is the specified anti-deformation length at the weld between the crossbeam (1) and the reinforcing block (11); the length of the second gap is the specified anti-deformation length at the middle of the crossbeam (1); The control bolt (82) passes through the vertical section (612) and is threadedly connected to the vertical section (612). After passing through the vertical section (612), the control bolt (82) abuts against the deformation control block (81). The set nut (83) is threadedly connected to the control bolt (82). After the deformation control block (81) is positioned, the set nut (83) rotates to abut against the side of the vertical section (612) away from the deformation control block (81). The deformation control block (81) is connected to a guide rod (84). The end of the guide rod (84) away from the deformation control block (81) passes through the vertical section (612) and is slidably connected to the vertical section (612). The guide rod (84) is located on both sides of the control bolt (82) in the radial direction.

6. The anti-deformation tooling for welding the crossbeam of a new energy battery pack according to claim 5, characterized in that: The fixed clamping module (3) includes a second limiting component (31) and a second adjusting mechanism (32). The second limiting component (31) and the first limiting component (6) have the same structure, and the second adjusting mechanism (32) and the first adjusting mechanism (7) have the same structure. The support base (61) of the second limiting component (31) is provided with a fixing block (311) and a longitudinal pressing component (33) on the vertical section (612). The fixing block (311) is fixedly installed on the side of the vertical section (612) near the crossbeam (1) by fixing shims. The longitudinal pressing component (33) includes a pressing plate (331), a support screw (332), and a pressing bolt (333). The bottom surface of the pressing plate (331) abuts against the top surface of the crossbeam (1). The bottom surface of the support screw (332) is movably connected to the top surface of the base plate (2). The top end of the support screw (332) passes through the pressing plate (331) and is threadedly connected to the pressing plate (331). The clamping plate (331) has a movable hole (334) for the clamping bolt (333) to pass through. The clamping bolt (333) passes through the movable hole (334) and is movably connected to the clamping plate (331). The movable hole (334) is an oblong hole. After passing through the clamping plate (331), the clamping bolt (333) passes into the top of the vertical section (612) of the support seat (61) of the limiting component two (31). The clamping bolt (333) is threadedly connected to the vertical section (612) of the support seat (61) of the limiting component two (31).

7. The anti-deformation tooling for welding the crossbeam of a new energy battery pack according to claim 6, characterized in that: A fastening washer (335) is provided between the nut of the clamping bolt (333) and the top surface of the vertical section (612) of the support seat (61) of the limiting component two (31). The nut of the clamping bolt (333) is tightened by the fastening washer (335) and the top surface of the vertical section (612) of the support seat (61) of the limiting component two (31).

8. A method for preventing deformation, using the anti-deformation tooling for welding the crossbeam of a new energy battery pack as described in claim 7, characterized in that, The method includes the following steps: S1. Positioning of crossbeam (1) and reinforcing block (11): Place the crossbeam (1) on the support base (61) so that one end of the crossbeam (1) in the length direction abuts against the backrest (21). Then place the reinforcing block (11) at the welding point of the crossbeam (1) so that the side wall of the reinforcing block (11) abuts against the side wall of the crossbeam (1). At this time, the bottom surface of the crossbeam (1) and the bottom surface of the reinforcing block (11) are in contact with the top surface of the height reference block (63). Then, the positioning post (2211) of the positioning block (22) is inserted into the positioning hole (2212) at the corresponding position, and the side of the first unit plate (2221) close to the second unit plate (2222) abuts against one end of the reinforcing block (11) in the length direction, and the bottom surface of the second unit plate (2222) abuts against the top of the reinforcing block (11). S2, fixing the crossbeam (1): operate the fixing clamping modules (3) at both ends of the crossbeam (1) in sequence. During operation, first rotate the drive bolt (733) of the fixing clamping module (3) so that the corresponding push block (72) moves toward the crossbeam (1). The push block (72) pushes the crossbeam (1) along the width direction of the crossbeam (1) until the side wall of the crossbeam (1) abuts against the fixing block (311) of the fixing clamping module (3). Adjust the height of the clamping plate (331) according to the height of the top surface of the crossbeam (1) until the bottom surface of the clamping plate (331) is flush with the top surface of the crossbeam (1). Then slide the support screw (332) of the longitudinal clamping assembly (33) until the plate surface of the clamping plate (331) covers the top surface of the crossbeam (1) in the width direction. Then tighten the clamping bolt (333) until the bottom surface of the clamping plate (331) and the top surface of the crossbeam (1) abut. S3. Initial adjustment of crossbeam (1) against deformation: First, adjust the welding joint between crossbeam (1) and reinforcing block (11) against deformation. During operation, rotate the drive bolt (733) of the anti-deformation adjustment module (4) to make the corresponding push block (72) move towards the crossbeam (1). The moving distance of the push block (72) is the length of the gap. The push block (72) pushes the crossbeam (1) along the width direction of the crossbeam (1) to the deformation control block (81) of the reinforcing block (11) and the anti-deformation adjustment module (4). At this time, the reinforcing block (11) cannot move freely. Remove the positioning block (22) and then continue to rotate the drive bolt (733) of the anti-deformation adjustment module (4) so ​​that the corresponding push block (72) continues to move towards the direction close to the crossbeam (1). The distance that the push block (72) continues to move is the deformation length of the elastic pad (811). The push block (72) pushes the crossbeam (1) along the width direction of the crossbeam (1) until the reinforcing block (11) and the deformation control block (81) of the anti-deformation adjustment module (4) are in close contact. Next, the middle part of the crossbeam (1) is adjusted by reverse deformation. During operation, the drive bolt (733) of the auxiliary adjustment module (5) is rotated so that the corresponding push block (72) moves towards the crossbeam (1). The moving distance of the push block (72) is the length of the gap two. The push block (72) pushes the crossbeam (1) along the width direction of the crossbeam (1) until it is directly in contact with the deformation control block (81) of the auxiliary adjustment module (5). S4. Fine adjustment of crossbeam (1) anti-deformation: According to the specified anti-deformation amount required at each part of the crossbeam (1), measure whether the current bending deformation amount meets the standard. If it meets the standard, no further adjustment is needed. If it does not meet the standard, it needs to be adjusted again. When the amount to be adjusted at the non-compliant part is between 1-3mm, weld and debug with a displacement of 1mm each time. When the amount to be adjusted at the non-compliant part is between 0.1-0.9mm, weld and debug with a displacement of 0.3-0.5mm each time until the quality measurement data is normally distributed and qualified. If the amount of anti-deformation is insufficient: loosen the set nut (83), rotate the control bolt (82) according to the insufficient amount of anti-deformation of the crossbeam (1), so that the deformation control block (81) moves a suitable distance away from the crossbeam (1), and at the same time rotate the drive bolt (733) at the corresponding position, so that the push block (72) moves a suitable distance closer to the crossbeam (1) until the amount of anti-deformation of the crossbeam (1) meets the standard; If the amount of anti-deformation is too much: slightly rotate the drive bolt (733) of the drive adjustment mechanism (7) to move the push block (72) a suitable distance away from the crossbeam (1), and at the same time rotate the control bolt (82) at the corresponding position to move the deformation control block (81) a suitable distance closer to the crossbeam (1) until the amount of anti-deformation of the crossbeam (1) meets the standard.

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