Welding tooling fixture for new energy automobile structure stamping part

Abstract

The present application relates to the technical field of stamping part welding clamping, and particularly relates to a welding tooling clamping table for a new energy automobile structure stamping part, which comprises a base, an avoidance type follow-up compression assembly and a sliding table seat. The present application discards the traditional compression mode, first compresses the butt joint gap with high pressure to calibrate the welding reference, and only avoids the work area of a single point during welding, while the rest of the points are continuously clamped to avoid workpiece walking deviation. Point position dynamic resetting is realized by relying on the linkage of the gear and the rotating wheel, re-compression avoids the high-temperature welding seam area, and the variable voltage mode of high voltage fitting first and low voltage stable voltage later is matched, which not only eliminates the problems of clamp interference welding and workpiece surface damage, but also suppresses the post-welding deformation, improves the welding size precision and the yield of finished products.

Description

Technical Field

[0001] This invention relates to the field of welding clamping technology for stamped parts, and more particularly to a welding fixture clamping table for structural stamped parts of new energy vehicles. Background Technology

[0002] Stamped parts such as battery pack housings, side panels, doors, and chassis structures for new energy vehicles generally have the characteristics of large size range, complex shape, poor rigidity due to thin walls, and high requirements for assembly and welding precision. These stamped parts are mainly assembled by spot welding. During welding, special clamping fixtures are required to accurately position and reliably clamp the workpiece to ensure welding position accuracy and workpiece assembly stability.

[0003] Currently, large-sized and complex-shaped stamped parts for new energy vehicles have relatively weak rigidity and require stringent processing precision. In actual welding operations, traditional fixtures generally adopt a fixed-point constant pressure clamping and overall loosening and avoidance operation mode. In the early stage of welding, it is difficult to effectively flatten the joint of the sheet metal, and it is difficult to eliminate the gaps in the splicing seam and the slight warping deviation of the sheet surface. During the welding process, the clamping parts are very likely to block the working trajectory of the welding gun, and often directly press on the high-temperature weld and the surrounding heat-affected zone, which can easily cause indentation and collapse damage to the sheet metal. At the same time, frequent overall loosening and unlocking can easily cause the workpiece to vibrate and shift, and the positioning reference will accumulate deviation, ultimately resulting in poor welding quality and difficulty in ensuring the consistency of workpiece processing.

[0004] To address the aforementioned technical deficiencies, a solution is proposed that aims to provide a dynamic avoidance and misalignment clamping mechanism, balancing clamping stability and workpiece protection, and effectively optimizing the welding and forming quality of stamped parts. Summary of the Invention

[0005] The purpose of this invention is to provide a welding fixture for use in structural stamping parts of new energy vehicles, in order to solve the aforementioned technical defects.

[0006] The objective of this invention can be achieved through the following technical solution: a welding fixture for stamping structural parts in new energy vehicles, comprising: The base has multiple support platforms on its top for supporting automotive stampings, and a lifting frame is mounted via an electric push rod. The avoidance-type follow-up clamping assembly first presses the edges of the weld seam on both sides of the stamped part with high pressure to achieve precise welding, then avoids the movement of the welding torch along the weld seam, and then presses the stamped part on one side of the weld seam with low pressure to maintain overall stability. It includes a matrix sliding column clamp that conforms to the top of the stamped part and is held by a support table, a rotating wheel that pushes the matrix sliding column clamp to lift and avoid the weld seam and press it in a second offset position. When the matrix sliding column clamp is pressed in a second offset position, its conforming contact surface is used to forcefully maintain its vertical state and anti-slip properties, and the support table stably clamps the stamped part. The slide base has a movable platform inside, and a toothed plate 1 for forward deflection and avoidance of the rotating wheel and a toothed plate 2 for secondary reverse deflection and reset are installed on one side of the movable platform.

[0007] Preferably, the support platform is detachably mounted on the base by bolts, and the height and top shape of each support platform match the shape and height difference of the stamping surface.

[0008] Preferably, a rotating rod is fixedly installed on the rotating wheel, and two sets of adjusting blocks that are slidably connected to the rotating rod are fixedly connected to the rotating rod. The adjusting blocks are threadedly connected with fixing bolts that abut against the lifting frame.

[0009] Preferably, the rotating wheel includes two sets of clamping plates and a counterweight block eccentrically arranged and fixedly connected between the two sets of clamping plates. A sleeve is provided between the two sets of clamping plates, and a square rod that is slidably connected to the matrix sliding column clamp is movably connected inside the sleeve. A plurality of fixing bolts that abut against the square rod are threaded on the sleeve.

[0010] Preferably, a fixing pin is fixedly connected to the sleeve and rotatably connected to the clamp, a universal ball is fixedly connected to the bottom of the square rod, and a ball seat that is rotatably connected to the universal ball is installed on the top of the matrix sliding column clamp.

[0011] Preferably, a stop block is fixedly connected to one side of the adjusting block, and a limiting block that abuts against the stop block is fixedly connected to the rotating rod.

[0012] Preferably, the slide base is fixedly connected to one side of the lifting frame, and a guide rail that is slidably connected to the moving platform is fixedly installed on the inner wall of the slide base. A lead screw that is threadedly connected to the moving platform is rotatably connected inside the slide base, and a servo motor that drives the lead screw to rotate is installed on the slide base by bolts.

[0013] Preferably, the first toothed plate and the second toothed plate are staggered vertically, and one end of the rotating rod passes through the corresponding adjusting block and is equipped with a gear.

[0014] The beneficial effects of this invention are as follows: (1) This invention differs from the traditional operation method of full-process fixed-point clamping and overall loosening. It adopts dynamic clamping and fixing with high pressure pre-fitting and shaping, single-point avoidance and full-process pressure holding and misalignment re-pressing: in the early stage of welding, the weld seam splice gap is compacted by the matrix sliding column clamp with high pressure, the plate butt joint deviation is corrected, and the initial welding benchmark is accurate. During the welding process, only the corresponding point of the welding torch is raised and moved aside, while the other clamping points remain locked at all times. There is no gap where the workpiece is completely loosened, which effectively eliminates the micro-displacement and cumulative error caused by welding vibration and thermal stress. Then, through the linkage of the alternating meshing of the double toothed plate and the deflection of the rotating wheel, the clamping point is dynamically offset and reset with the trajectory of the welding torch, locking the workpiece assembly posture throughout the process, and improving the overall dimensional stability and batch consistency of long weld seam welding of new energy thin-walled stamping parts.

[0015] (2) The present invention is also adapted to the high temperature cooling forming characteristics of stamping parts welding, so as to solve the technical drawbacks of traditional fixtures that high pressure damages high temperature welds and low pressure clamping is unstable: through eccentric rotation pressing treatment, precise avoidance is achieved, completely eliminating the problem of fixture interference with welding gun movement and obstruction of weld points, and the secondary repress actively shifts to the room temperature base material area on the weld side, avoiding the heat-affected zone of the weld softened by high temperature, and eliminating appearance defects such as indentation, collapse, and sticking material; Meanwhile, relying on the deflection limit during the secondary pressure of the square rod, a variable pressure characteristic is formed, which first applies high pressure and then maintains the shape. The high pressure in the early stage eliminates the gaps and slight warping of the plate assembly, while the low pressure in the later stage continuously stabilizes the pressure to constrain cooling and rebound. This not only ensures the reliability of clamping and fixing, but also avoids the squeezing deformation and stress residue caused by continuous high pressure. It effectively suppresses warping and shrinkage deformation after welding, and significantly improves the yield and forming quality of welded products. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings; Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram showing the connection between the lifting frame and the slide base of the present invention; Figure 3 This is a schematic diagram of the installation of the avoidance-type follow-up clamping component of the present invention on the lifting frame; Figure 4 This is a schematic diagram of the structure of the avoidance-type follow-up clamping assembly of the present invention; Figure 5 This is a schematic diagram of the connection between the rotating wheel and the sleeve of the present invention; Figure 6 This is a schematic diagram of the installation of the square rod of the present invention; Figure 7 This is a schematic diagram of the structure of the slide base of the present invention; Figure 8 This is a schematic diagram of the process of offset pressing of the linked matrix sliding column fixture during the translation of the toothed plate in this invention.

[0017] Legend: 1. Base; 11. Support platform; 12. Electric push rod; 13. Lifting frame; 2. Avoidance-type follow-up clamping assembly; 21. Matrix sliding column clamp; 22. Rotating wheel; 23. Rotating rod; 24. Adjusting block; 25. Clamping plate; 26. Counterweight block; 27. Sleeve; 28. Square rod; 29. ​​Fixing pin; 210. Stop block; 211. Limiting block; 212. Gear; 3. Slide base; 31. Moving platform; 32. Gear plate one; 33. Gear plate two; 34. Lead screw; 35. Servo motor. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1-8 As shown, the following solutions can be used to address the problem that traditional clamps, which generally use fixed-point constant pressure clamping and overall loosening and avoidance, cannot effectively flatten the joints of the plates in the early stages of welding, making it difficult to eliminate the gaps between the joints and the slight warping deviations of the plate surface. The welding fixture stand for stamping structural parts of new energy vehicles in this embodiment includes: The base 1 has multiple support platforms 11 for supporting automotive stamping parts on its top, and a lifting frame 13 is installed via an electric push rod 12. The avoidance type follow-up clamping component 2 first presses the edges of the weld seam on both sides of the stamped part with high pressure to make precise welding, then avoids the movement of the welding gun along the weld seam, and then presses the stamped part on one side of the weld seam with low pressure to maintain the overall fixation. It includes a matrix sliding column clamp 21 that conforms to the top of the stamped part and is clamped by the support table 11. The electric push rod 12 drives the lifting frame 13 to descend. The lifting frame 13 carries multiple matrix sliding column clamps 21 to descend synchronously and conform to the top of the stamping part. This causes the sliding columns on the matrix sliding column clamps 21 to make a large displacement relative movement, applying a large compression to the internal sliding column springs. Together with the support table 11, the stamping part is clamped with high pressure and elasticity. This flattens and connects the two sides of the weld seam for precise welding. The matrix sliding column clamps 21 are pushed to rise and avoid the rotating wheel 22, which is then pressed and offset twice. When the matrix sliding column clamps 21 are pressed and offset twice, their vertical state and anti-slip properties are forcibly maintained by their conforming contact surface. Together with the support table 11, the stamping part is stably clamped. The slide base 3 has a movable platform 31 inside, and a toothed plate 32 for the rotating wheel 22 to deflect forward and avoid, and a toothed plate 33 for the second deflection and reset.

[0020] The support platform 11 is detachably mounted on the base 1 by bolts. The position of each support platform 11 is located at each weld seam. The detachable installation is used to replace the support platform 11 required for different stamping parts and is set according to the position of the weld seam. The height and top shape of each support platform 11 match the shape and height difference of the stamping surface.

[0021] A rotating rod 23 is fixedly installed on the rotating wheel 22, and two sets of adjusting blocks 24 that are slidably connected to the rotating rod 23 are fixedly connected to the rotating rod 23. The adjusting blocks 24 are threaded with fixing bolts that abut against the lifting frame 13. When changing the support platform 11 required for different stamping parts, the adjusting blocks 24 are moved horizontally to change the pressing position of the matrix sliding column clamp 21, so as to effectively press the stamping parts. Then, the fixing bolts are rotated to fix the position of the adjusting blocks 24 after they have moved.

[0022] The rotating wheel 22 includes two sets of clamping plates 25 and a counterweight block 26 fixedly connected between the two sets of clamping plates 25 and eccentrically arranged. A sleeve 27 is provided between the two sets of clamping plates 25, and a square rod 28 that is slidably connected to the matrix sliding column clamp 21 is slidably connected inside the sleeve 27. Multiple fixing bolts that abut against the square rod 28 are threaded on the sleeve 27. The sliding connection between the square rod 28 and the sleeve 27 is used to further adjust the height of the corresponding matrix sliding column clamp 21 according to the large difference in the surface of the stamped part, so as to avoid the problem of deformation of the stamped part during the pressing process. The surface of the square rod 28 is roughened to effectively limit the problem of sliding of the square rod 28 after the position is locked when the fixing bolt abuts against the surface of the square rod 28.

[0023] A fixing pin 29 is fixedly connected to the sleeve 27 and rotatably connected to the clamping plate 25. When multiple rotating wheels 22 are set on the same rotating rod 23, the distance between the fixing pin 29 on each rotating wheel 22 and the matrix sliding column clamp 21 is adjusted according to the height difference of the stamping surface, so that the matrix sliding column clamp 21 on the same rotating rod 23 clamps the stamping. When the welding torch moves to the pressing area of ​​the matrix sliding column clamp 21, it is deflected in the positive direction by the rotating wheel 22. Through the eccentric setting of the fixing pin 29 and the axis of the clamping plate 25, combined with the sleeve 27 and the square rod 28, the matrix sliding column clamp 21 is driven to rise away from the stamping, which not only ensures that the workpiece at the corresponding point is firmly clamped in the early stage, but also prevents the subsequent welding torch from being blocked when moving to the corresponding point. By adopting a single-point avoidance and full-process pressure method, the workpiece is always clamped by the nearest point area around the avoidance clamping point, without any gaps in complete clamping, and the workpiece has zero free movement throughout the entire process, so that the welding reference of the entire long weld seam is always stable. The bottom of the square rod 28 is fixedly connected to a universal ball, and the top of the matrix sliding column clamp 21 is equipped with a ball seat that is rolled and connected to the universal ball.

[0024] A stop block 210 is fixedly connected to one side of the adjusting block 24, and a limiting block 211 that abuts against the stop block 210 is fixedly connected to the rotating rod 23. Before the lifting frame 13 descends, the limiting block 211 on the rotating rod 23 abuts against the bottom of the stop block 210. At this time, the fixing pin 29 is located at the lowest point that can be reached by circumferential rotation, away from the counterweight 26. Through the gravity of the counterweight 26, the limiting block 211 is pushed to continuously abut against the bottom of the stop block 210, thereby achieving effective clamping of the stamping part by the matrix sliding column clamp 21 after the lifting frame 13 descends. The rear rotating wheel 22 deflects at an angle greater than 200 degrees, causing the top of the limiting block 211 to abut against the stop block 210. That is, the fixing pin 29 passes the highest point that can be reached by the circumferential rotation, preventing the rotating wheel 22 from continuously deflecting in the forward or reverse direction. This ensures that the position of the rotating wheel 22 is locked after it deflects in the forward direction, laying the foundation for the smooth reset of the rotating wheel 22 after deflection in the reverse direction.

[0025] The slide base 3 is fixedly connected to one side of the lifting frame 13. The electric push rod 12 is set between the slide base 3 and the base 1, and multiple sets of telescopic rods are set between the two to stabilize the lifting stability of the slide base 3. The inner wall of the slide base 3 is fixedly installed with a guide rail that is slidably connected to the moving platform 31. The slide base 3 is rotatably connected with a lead screw 34 that is threadedly connected to the moving platform 31. A servo motor 35 that drives the lead screw 34 to rotate is installed on the slide base 3 by bolts. The servo motor 35 drives the lead screw 34 to rotate, and the lead screw 34 drives the moving platform 31 to move synchronously with the toothed plate 32 and the toothed plate 33.

[0026] Toothed plate 32 and toothed plate 33 are staggered vertically, with toothed plate 32 located above toothed plate 33 and their teeth facing each other. One end of the rotating rod 23 passes through the corresponding adjusting block 24 and is equipped with a gear 212. When the moving platform 31 is moved horizontally, toothed plate 32 meshes with the corresponding gear 212, driving the gear 212 to cooperate with the rotating rod 23 to carry the rotating wheel 22 to deflect in the forward direction. Then, the top of the limiting block 211 and the stop block 210 abut against each other, and the counterweight block 26 limits the rotation of the rotating wheel 22, so that toothed plate 33 and gear 212 mesh smoothly. The toothed plate 33 pushes the rotating wheel 22 to rotate in the opposite direction, and the matrix sliding column clamp 21 moves down in a synchronous circumferential rotation. The matrix sliding column clamp 21 makes secondary contact with the stamping part. The contact area is located at the top of the room temperature on one side of the weld, avoiding the core area of ​​the high temperature weld. It is pressed into the stable base material area at room temperature, which does not damage the weld formation and can continue to lock the workpiece posture, thus solving the problem of pressure damage to the high temperature soft base material.

[0027] Example 2: Please refer to Figures 4-6 and Figure 8As shown, the following solutions can be used to address the problem that constant pressure throughout the process can easily cause deformation of the sheet material, resulting in indentations and collapse damage. In this embodiment, a fixing pin 29 is fixedly connected to the sleeve 27 and rotatably connected to the clamp 25. A universal ball is fixedly connected to the bottom of the square rod 28. A ball seat that is rotatably connected to the universal ball is installed on the top of the matrix sliding column clamp 21. The universal ball and the ball seat are used to realize the universal hinge between the square rod 28 and the matrix sliding column clamp 21.

[0028] Toothed plate 32 and toothed plate 33 are staggered vertically. One end of the rotating rod 23 passes through the corresponding adjusting block 24 and is equipped with a gear 212. Toothed plate 33 pushes the rotating wheel 22 to rotate in the opposite direction. The matrix sliding column clamp 21 rotates downward in a circumferential manner. During the process of the matrix sliding column clamp 21 making secondary contact with the room temperature top of the weld seam side of the stamping part, the unevenness of the stamping part surface, combined with the independent sliding contact of multiple sliding columns on the matrix sliding column clamp 21, forms an adaptive contour clamping surface to avoid the problem of mutual sliding between the matrix sliding column clamp 21 and the stamping part. The matrix sliding column clamp 21 is forced to maintain the vertical state of the stamped part after clamping it. During the process of the fixed pin 29 rotating to the lowest point and rising past the lowest point, the sliding column on the matrix sliding column clamp 21 abuts against the stamped part and is limited. The matrix sliding column clamp 21 slides relative to its own sliding column to prevent the distance between the fixed pin 29 and the stamped part from decreasing. The interference wheel 22 deflects further during this process. The wheel 22 continues to rotate. Because the matrix sliding column clamp 21 conforms to the stamped part and is limited, the square rod 28 and the matrix sliding column clamp 21 are forced to deflect, which in turn passively causes the square rod and the matrix sliding column clamp 21 to deflect. After deflection, the matrix sliding column clamp 21 again restricts the stable clamping of the stamping part through conformal contact. During the second pressing, the square rod 28 is in an inclined state. Due to the increased distance between the fixing pin 29 and the matrix sliding column clamp 21, the lowering height of the matrix sliding column clamp 21 is less than the previous lowering height. Several sliding columns on the matrix sliding column clamp 21 still maintain conformal contact with the stamping part, and the stamping part is pressed with low pressure to maintain overall stability. In addition, as the matrix sliding column clamp 21 abuts against the stamping part and the rotating wheel 22 continues to reverse, the height of the fixing pin 29 decreases further compared to the initial pressing, thereby applying a greater pressure to the matrix sliding column clamp 21. This pressure removes the slight warping and slight lifting of the plate surface caused by the weld forming, allowing the plate outline of the welded area to return to the standard state. After applying a lower pressure than the initial pressing, the weld and heat-affected zone of the stamped part are in a high-temperature softened state. Even when clamped in the room-temperature base material area next to the weld, the overall temperature of the sheet is still relatively high and the rigidity is low. Through the deflection process, the pressure is automatically released and converted to low-pressure constant pressure bonding, which will not damage the surface of the workpiece or squeeze and deform it, and can continuously lock the posture of the workpiece, limiting the free contraction, springback and twisting of the sheet during the cooling process.

[0029] Example 3: Please refer to Figures 1-8 As shown, the present invention also proposes a method for using a welding fixture clamp in the structural stamping parts of new energy vehicles, including the following steps: Step 1: Assemble the stamping plate onto the top of multiple support platforms 11, with each support platform 11 positioned at each weld seam. The electric push rod 12 drives the lifting frame 13 to descend. The lifting frame 13 carries multiple matrix sliding column clamps 21, which descend synchronously to conform to the top of the stamping part. This causes the sliding columns on the matrix sliding column clamps 21 to move relative to each other with a large displacement, applying a large amount of compression to the internal sliding column springs. This, in conjunction with the support platforms 11, provides high-pressure elastic clamping for the stamping part, thereby flattening and butt-jointing the edges of the weld seam for precise welding. Step 2: During the continuous welding process, with the welding torch moving from the right side to the left side of the slide table 3 and along the weld seam, when the welding torch moves to the pressing area of ​​the matrix sliding column clamp 21, the servo motor 35 drives the lead screw 34 to rotate. The lead screw 34 drives the moving platform 31 to translate. The toothed plate 32 on the moving platform 31 meshes with the corresponding gear 212. Through the translation of the toothed plate 32, the gear 212 is driven to cooperate with the rotating rod 23 to carry the rotating wheel 22 to deflect in the forward direction. At the same time, the bottom of the limiting block 211 and the stop block 210 on the rotating rod 23 separates. Through the eccentric setting of the fixed pin 29 and the axis of the clamping plate 25, combined with the sleeve 27 and the square rod 28, the matrix sliding column clamp 21 is driven to rise away from the stamping part, which not only ensures that the workpiece at the corresponding point is firmly clamped in the early stage, but also prevents the welding torch from being blocked when it moves to the corresponding point in the later stage. By adopting a single-point avoidance and full-process pressure method, the workpiece is always clamped by the nearest point area around the avoidance clamping point, without any gaps in complete clamping, and the workpiece has zero free movement throughout the entire process, so that the welding reference of the entire long weld seam remains stable. Step 3: When the toothed plate 32 separates from the gear 212, the gear 212 deflects at an angle greater than 200 degrees, causing the top of the limiting block 211 to abut against the stop block 210, preventing the rotating wheel 22 from continuously deflecting in the forward or reverse direction. This allows the welding torch to move away from under the matrix sliding column clamp 21, and the toothed plate 33 then smoothly engages with the gear 212. The toothed plate 33 then translates and engages with the gear 212, pushing the rotating wheel 22 to rotate in the opposite direction. During this reverse rotation, the rotating wheel 22 drives the fixing pin 29 to rotate in the opposite circumferential direction, and the matrix sliding column clamp 21 moves downward in a synchronous circumferential rotation. This causes the matrix sliding column clamp 21 to make secondary contact with the stamped part, and the contact area is located at the top of the room temperature on one side of the weld, avoiding the core area of ​​the high-temperature weld. It is pressed into the stable base material area at room temperature, which neither damages the weld formation nor prevents the workpiece from being locked in position, thus solving the problem of pressure damage to the high-temperature soft base material. Then, the matrix sliding column clamp 21 abuts against the limit, and the rotating wheel 22 continues to rotate. The square rod 28 deflects between the matrix sliding column clamp 21, so that during the second re-pressing, the square rod 28 is in an inclined state, and the lowering height of the matrix sliding column clamp 21 is less than the previous lowering height, so as to maintain the overall stability of the stamping part by keeping it under low pressure.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A welding fixture for use in stamped structural parts of new energy vehicles, characterized in that, include: The base (1) has multiple support platforms (11) for supporting automotive stampings on its top, and a lifting frame (13) is installed by an electric push rod (12). The avoidance type follow-up clamping assembly (2) first presses the edges of the weld seam on both sides of the stamped part with high pressure to make precise welding, then avoids the movement of the welding gun along the weld seam, and then presses the stamped part on one side of the weld seam with low pressure to maintain the overall fixation. It includes a matrix sliding column clamp (21) that conforms to the top of the stamped part and is clamped by the support table (11), a rotating wheel (22) that pushes the matrix sliding column clamp (21) to lift and avoid and press the part in a second misalignment, and when the matrix sliding column clamp (21) is pressed in a second misalignment, its vertical state and anti-slip properties are forcibly maintained by its conforming contact surface, and the stamped part is stably clamped by the support table (11). The slide base (3) has a movable platform (31) inside, and a toothed plate (32) for the rotating wheel (22) to deflect in the forward direction to avoid it, and a toothed plate (33) for the second reverse deflection to reset it.

2. The welding fixture stand for stamped structural parts of new energy vehicles according to claim 1, characterized in that, The support platform (11) is installed on the base (1) by bolt detachment, and the height and top shape of each support platform (11) match the shape and height difference of the stamping surface.

3. The welding fixture for stamped structural parts of new energy vehicles according to claim 1, characterized in that, A rotating rod (23) is fixedly installed on the rotating wheel (22), and two sets of adjusting blocks (24) that are slidably connected to the lifting frame (13) are fixedly connected to the rotating rod (23). The adjusting blocks (24) are threadedly connected with fixing bolts that abut against the lifting frame (13).

4. The welding fixture for stamped structural parts of new energy vehicles according to claim 1, characterized in that, The rotating wheel (22) includes two sets of clamps (25) and a counterweight (26) fixedly connected between the two sets of clamps (25) and eccentrically arranged. A sleeve (27) is provided between the two sets of clamps (25), and a square rod (28) that is slidably connected to the matrix sliding column clamp (21) is slidably connected inside the sleeve (27). A plurality of fixing bolts that abut against the square rod (28) are threaded on the sleeve (27).

5. The welding fixture stand for stamped structural parts of new energy vehicles according to claim 4, characterized in that, A fixing pin (29) is fixedly connected to the sleeve (27) and rotates to connect with the clamp (25). A universal ball is fixedly connected to the bottom of the square rod (28). A ball seat that is rolled to connect with the universal ball is installed on the top of the matrix sliding column clamp (21).

6. The welding fixture for stamped structural parts of new energy vehicles according to claim 3, characterized in that, A stop block (210) is fixedly connected to one side of the adjusting block (24), and a limiting block (211) that abuts against the stop block (210) is fixedly connected to the rotating rod (23).

7. The welding fixture stand for stamped structural parts of new energy vehicles according to claim 3, characterized in that, The slide base (3) is fixedly connected to one side of the lifting frame (13), and a guide rail that is slidably connected to the moving platform (31) is fixedly installed on the inner wall of the slide base (3). A lead screw (34) that is threadedly connected to the moving platform (31) is rotatably connected inside the slide base (3). A servo motor (35) that drives the lead screw (34) to rotate is installed on the slide base (3) by bolts.

8. The welding fixture for stamped structural parts of new energy vehicles according to claim 7, characterized in that, The toothed plate one (32) and toothed plate two (33) are staggered vertically, and one end of the rotating rod (23) passes through the corresponding adjusting block (24) and is equipped with a gear (212).

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