Vacuum adsorption tooling plate for preventing thin-walled roof welding warping

Abstract

This invention discloses a vacuum adsorption fixture for preventing warping during welding of thin-walled car roofs, belonging to the technical field of car roof welding devices. It includes an operating platform, with clamping mechanisms symmetrically arranged on both the left and right sides of the upper surface of the operating platform, and a pressing mechanism symmetrically arranged at the center of the upper surface of the operating platform. A fixing frame is fixedly connected to the outer wall of the operating platform. This invention integrates multiple structures of clamping, pressing, and vacuum adsorption, enabling all-round constraint of the thin-walled car roof. The clamping mechanism can flexibly adjust the spacing to adapt to workpieces of different sizes. Combined with rubber pads and buffer springs, it forms a flexible clamp, ensuring firm positioning while avoiding surface damage to the workpiece caused by rigid compression. Simultaneously, the pressing mechanism can pre-flatten the car roof panel, effectively improving the problem of easy warping of thin-walled plates and ensuring that the subsequent vacuum adsorption holes can fully fit the workpiece, resulting in a stable and reliable adsorption effect.

Description

Technical Field

[0001] This invention relates to the field of car roof welding equipment technology, and in particular to a vacuum adsorption tooling tray for preventing warping during thin-walled car roof welding. Background Technology

[0002] The elevator car top is a core component of the elevator car. Currently, most of them are made of thin-walled metal sheets welded together. The thin-walled sheets have a small overall thickness and weak structural rigidity. Under the heat of welding, they are prone to uneven thermal expansion and contraction, which makes the car top prone to problems such as warping, bulging, and deformation after forming. This seriously affects the assembly accuracy and appearance quality of the car top, resulting in a low product yield and failing to meet the assembly and use requirements of the whole elevator.

[0003] However, existing technologies using vacuum adsorption fixtures to fix thin-walled car roofs have poor versatility and cannot be adapted to clamping and fixing thin-walled car roof workpieces of different specifications and sizes. They can only be used for a single type of car roof, resulting in high equipment changeover costs and limited applicability, which is not conducive to mass production and diversification. At the same time, due to the thin thickness, high flexibility, and easy deformation of thin-walled car roof panels, the existing vacuum adsorption fixtures have a simple adsorption hole structure, which cannot form a tight fit with the thin-walled car roof panel. Gaps are easily generated between the panel surface and the adsorption surface of the fixture, resulting in large adsorption blind spots. This can easily lead to negative pressure leakage and uneven adsorption force, and cannot form a uniform and stable adsorption constraint on the entire thin-walled car roof panel. During the welding process, the areas of the panel surface that are not fully fitted will still warp and deform. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide solutions to the problems of poor versatility, inability to adapt to workpieces of multiple sizes, poor adhesion of thin-walled plates, uneven adsorption, and poor anti-warping effect in the existing tooling for welding thin-walled car roofs.

[0005] Technical solution: A vacuum adsorption tooling tray for preventing warping of thin-walled car roof welding, including an operating platform, with clamping mechanisms symmetrically arranged on the left and right sides of the upper surface of the operating platform, a pressing mechanism symmetrically arranged at the center of the upper surface of the operating platform, and a fixing frame fixedly connected to the outer side wall of the operating platform.

[0006] The upper surface of the operating platform is provided with an installation groove. The inner sidewall of the installation groove is fixedly connected to a positioning plate by multiple bolts. The upper surface of the positioning plate is provided with multiple through grooves. Each of the multiple grooves is provided with a connecting block. The upper surface of each of the multiple connecting blocks is provided with an adsorption hole. A connecting pipe is fixedly connected to each of the multiple connecting blocks. A vacuum interface is provided on the right side of the operating platform. A U-shaped connecting pipe is fixedly connected to the left end of the vacuum interface. The left end of the U-shaped connecting pipe is fixedly connected to the right side of the two connecting blocks on the right side.

[0007] Furthermore, the clamping mechanism includes two movable boxes. Each movable box has symmetrically arranged movable cavities. The inner walls of each movable cavity are rotatably connected to adjusting screws via a rotating shaft. The opposite ends of two adjacent adjusting screws are fixedly connected to a fixing rod. A motor is fixedly connected to the left side of each of the two movable boxes. The right ends of the output shafts of the two motors are fixedly connected to the left ends of the two adjusting screws on the left side, respectively. A through-type guide groove is formed on the lower inner surface of each of the two movable cavities. Moving blocks are threaded onto the outer walls of each adjusting screw. Guide sliders are fixedly connected to the lower surfaces of each moving block. U-shaped support plates are fixedly connected to the lower surfaces of each guide slider. Buffer boxes are provided on the inner walls of each U-shaped support plate and above the operating platform. Clamping plates are provided on the lower surfaces of each buffer box.

[0008] Furthermore, cylinders are fixedly connected to the upper surfaces of the multiple U-shaped support plates, the bottom ends of the output shafts of the multiple cylinders are fixedly connected to the upper surfaces of the multiple buffer boxes, buffer plates are slidably connected inside the multiple buffer boxes, movable rods are fixedly connected to the lower surfaces of the multiple buffer plates, the bottom ends of the multiple movable rods are fixedly connected to the upper surfaces of the multiple clamping plates, and buffer springs are fixedly connected to the upper surfaces of the inner interiors of the multiple buffer boxes.

[0009] Furthermore, rubber pads are fixedly connected to the lower surfaces of the plurality of clamps.

[0010] Furthermore, a fixing block is fixedly connected to the lower surface of each of the two movable boxes, and a bidirectional lead screw is threadedly connected to the inner sidewall of the two fixing blocks. A second motor is fixedly connected to the rear surface of the fixed frame, and the front end of the output shaft of the second motor is fixedly connected to the rear end of the bidirectional lead screw. The front end of the bidirectional lead screw is rotatably connected to the front surface of the inner sidewall of the fixed frame through a rotating shaft.

[0011] Furthermore, the lower surface of the operating platform is symmetrically provided with guide grooves II. The inner front surface and inner rear surface of the two guide grooves II are both fixedly connected to guide rods. The outer side walls of the two guide rods are slidably connected to guide sliders II. The lower surfaces of the multiple guide sliders II are respectively fixedly connected to the upper surfaces of the two movable boxes.

[0012] Furthermore, the clamping mechanism includes two U-shaped connecting frames. The inner sidewalls of the two U-shaped connecting frames are rotatably connected to clamping rollers via rotating shafts. The upper surfaces of the two U-shaped connecting frames are symmetrically provided with movable fixing parts. The inner sidewalls of the multiple movable fixing parts are symmetrically provided with clamping plates. Rotating rods are fixedly connected to the opposite sides of two adjacent clamping plates. The inner ends of the multiple rotating rods are rotatably connected to the front and rear surfaces of the multiple U-shaped support plates via rotating shafts. Torsion springs are sleeved on the outer sidewalls of the multiple rotating rods. The two ends of the multiple torsion springs are fixedly connected to the outer sidewalls of the multiple clamping plates and the multiple U-shaped support plates. Reinforcing rods are fixedly connected to the opposite sides of two adjacent clamping plates.

[0013] Furthermore, the inner sidewalls of the two U-shaped connecting frames are provided with through guide grooves 3. The inner front and inner rear surfaces of the two guide grooves 3 are fixedly connected to limit rods. The outer sidewalls of the two limit rods are symmetrically connected to guide sliders 3. The upper surfaces of the multiple guide sliders 3 are respectively fixedly connected to the lower surfaces of the multiple movable fixing parts.

[0014] Furthermore, the upper surface of the operating platform is fixedly connected to sliding guide rails on the left and right sides of the mounting groove. The outer sidewalls of the two sliding guide rails are symmetrically connected to guide rail sliders. The upper surfaces of the multiple guide rail sliders are fixedly connected to support rods. The upper surfaces of the inner sidewalls of the multiple U-shaped support plates are provided with sliding transverse grooves. The inner left and inner right sides of the multiple sliding transverse grooves are jointly fixedly connected to sliding rods. The outer sidewalls of the multiple sliding rods are slidably connected to movable sliders. The lower surfaces of the multiple movable sliders are respectively fixedly connected to the top ends of the multiple support rods.

[0015] Beneficial effects: This invention integrates multiple structures of clamping, pressing and vacuum adsorption, which can achieve all-round constraint on thin-walled car roofs. The clamping mechanism can flexibly adjust the spacing to adapt to workpieces of different sizes. Combined with rubber pads and buffer springs, it forms a flexible clamping, which not only ensures firm positioning, but also avoids damage to the workpiece surface caused by rigid extrusion. At the same time, the pressing mechanism can pre-flatten the car roof panel, effectively improving the problem of thin-walled panels being prone to curling, ensuring that the subsequent vacuum adsorption holes can fully fit the workpiece, and the adsorption effect is stable and reliable.

[0016] This invention, through the setting of multiple sets of guiding sliding structures, including guide grooves, guide rods, guide rail sliders and other components, can guide and limit the movement of moving components such as movable boxes and U-shaped support plates throughout the entire process. The movement of each component is smooth and stable, without any deviation, jamming or shaking. This allows for precise alignment of clamping and pressing actions, thereby resulting in strong overall mechanical linkage and coordinated operation of each structure, which greatly improves the stability and accuracy of tooling operation and is suitable for continuous welding operation scenarios.

[0017] In this invention, the clamping mechanism adopts an elastic clamping structure of torsion spring and clamping roller. During operation, the roller can always be in close contact with the car top surface, continuously applying balanced pressure to the plate surface, effectively offsetting the thermal stress generated by welding, suppressing workpiece warping and deformation from the root, and the clamping roller can be quickly lifted by pushing the clamping plate upward. The workpiece loading and unloading operation is simple and convenient. The overall structure layout is compact and reasonable, the parts fit tightly, the service life is long, and the practicality and adaptability are significantly improved.

[0018] This invention adopts a partitioned vacuum air path design. Connecting pipes and U-shaped connecting pipes connect the adsorption holes at various locations. After connecting to external vacuum equipment, a uniform negative pressure field can be formed to adsorb and fix the flattened thin-walled car roof as a whole. Adsorption constraint is maintained throughout the welding process, further limiting the free deformation of the plate. Together with the mechanical pressing and clamping structure, it forms a double protection, effectively improving the welding quality of the car roof and reducing the generation of defective products. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the operating platform, positioning plate, and connecting block of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the connecting block, connecting pipe and vacuum interface of the present invention;

[0022] Figure 4 This is a front view structural schematic diagram of the overall cross-section of the present invention;

[0023] Figure 5 This is a front view structural schematic diagram of the cross-section of the movable box, U-shaped support plate and buffer box of the present invention;

[0024] Figure 6 This is a structural schematic diagram of the movable box, bidirectional lead screw, and guide rod of the present invention;

[0025] Figure 7 This is a front view structural schematic diagram of the cross-section of the U-shaped connecting frame, the pressing roller, and the movable fixing component of the present invention;

[0026] Figure 8 This is the present invention. Figure 4 Enlarged structural diagram at point A;

[0027] Figure 9 This is the present invention. Figure 5 A magnified structural diagram at point B in the middle.

[0028] In the diagram: 1. Operating platform; 2. Clamping mechanism; 3. Pressing mechanism; 4. Fixing frame; 5. Mounting slot; 6. Positioning plate; 7. Groove; 8. Connecting block; 9. Adsorption hole; 10. Connecting pipe; 11. Vacuum interface; 12. U-shaped connecting pipe; 13. Sliding guide rail; 14. Guide rail slider; 15. Support rod; 16. Sliding transverse groove; 17. Sliding rod; 18. Movable slider; 201. Movable box; 202. Movable cavity; 203. Adjusting screw; 204. Fixing rod; 205. Motor 1; 206. Guide groove 1; 207. Moving block; 208. Guide slider 1; 209. 210. U-shaped support plate; 211. Buffer box; 212. Clamping plate; 213. Cylinder; 214. Buffer plate; 215. Movable rod; 216. Buffer spring; 217. Rubber pad; 218. Fixing block; 219. Two-way lead screw; 220. Motor II; 221. Guide groove II; 222. Guide rod; 222. Guide slider II; 301. U-shaped connecting frame; 302. Pressing roller; 303. Moving fixing part; 304. Pressing plate; 305. Rotating rod; 306. Torsion spring; 307. Reinforcing rod; 308. Guide groove III; 309. Limiting slide rod; 310. Guide slider III. Detailed Implementation

[0029] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example

[0031] like Figures 1-4 As shown, a vacuum adsorption fixture for preventing warping of thin-walled car roof welding is provided, including an operating platform 1. Clamping mechanisms 2 are symmetrically arranged on the left and right sides of the upper surface of the operating platform 1. A pressing mechanism 3 is symmetrically arranged at the center of the upper surface of the operating platform 1. A fixing frame 4 is fixedly connected to the outer wall of the operating platform 1. An installation groove 5 is opened on the upper surface of the operating platform 1. A positioning plate 6 is fixedly connected to the inner side wall of the installation groove 5 by multiple bolts. A plurality of through grooves 7 are opened on the upper surface of the positioning plate 6. A connecting block 8 is arranged inside the plurality of grooves 7. An adsorption hole 9 is opened on the upper surface of the plurality of connecting blocks 8. A connecting pipe 10 is fixedly connected to the plurality of connecting blocks 8. A vacuum interface 11 is arranged on the right side of the operating platform 1. A U-shaped connecting pipe 12 is fixedly connected to the left end of the vacuum interface 11. The left end of the U-shaped connecting pipe 12 is fixedly connected to the right side of the two connecting blocks 8 on the right side respectively.

[0032] In use, the thin-walled car top is placed above the operating platform 1. The workpiece is positioned using the symmetrically arranged clamping mechanisms 2. The pressing mechanisms 3, symmetrically arranged at the center of the operating platform 1, flatten and limit the thin-walled car top, effectively preventing the workpiece from curling or deforming and affecting the adsorption effect of the adsorption holes 9. The fixing frame 4 on the outer wall of the operating platform 1 provides protection and reinforcement for the overall structure. The mounting groove 5 on the upper surface of the operating platform 1 securely assembles the positioning plate 6 with bolts. The groove 7 on the positioning plate 6 is used to house the connecting blocks 8. The adsorption holes 9 inside each connecting block 8 are interconnected by connecting pipes 10 to achieve air passage. The external vacuum equipment uses vacuum... The interface 11 is connected, and then the negative pressure is evenly delivered to each connecting block 8 and the adsorption hole 9 through the U-shaped connecting pipe 12. This allows the flattened thin-walled car top to fully fit with the tooling surface, forming a stable and uniform vacuum adsorption force. After clamping and adsorption fixation are completed, the thin-walled car top can be welded by the welding device above. The dual cooperation ensures that the workpiece is firmly positioned and the plate surface is flat, while the adsorption hole 9 can play its adsorption role normally. The workpiece is reliably constrained throughout the process, effectively suppressing the warping and deformation of the thin-walled car top during the welding process. The overall structure is reasonably laid out and the air passage is smoothly connected. The positioning, flattening and vacuum adsorption functions work together to improve the workpiece clamping stability and welding quality.

[0033] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 9 As shown, the clamping mechanism 2 includes two movable boxes 201. Each movable box 201 has symmetrically arranged movable cavities 202 inside. The inner walls of these cavities are all rotatably connected to adjusting screws 203 via rotating shafts. The opposite ends of two adjacent adjusting screws 203 are fixedly connected to fixing rods 204. Motors 205 are fixedly connected to the left sides of each of the two movable boxes 201. The right ends of the output shafts of the two motors 205 are respectively fixed to the left ends of the two left adjusting screws 203. The two movable cavities 202 are connected in a fixed manner. The lower surface of each cavity is provided with a through guide groove 206. The outer side wall of each adjusting screw 203 is threaded with a moving block 207. The lower surface of each moving block 207 is fixedly connected with a guide slider 208. The lower surface of each guide slider 208 is fixedly connected with a U-shaped support plate 209. The inner side wall of each U-shaped support plate 209 and above the operating platform 1 is provided with a buffer box 210. The lower surface of each buffer box 210 is provided with a clamping plate 211.

[0034] A cylinder 212 is fixedly connected to the upper surface of multiple U-shaped support plates 209. The bottom end of the output shaft of multiple cylinders 212 is fixedly connected to the upper surface of multiple buffer boxes 210. Buffer plates 213 are slidably connected inside multiple buffer boxes 210. Movable rods 214 are fixedly connected to the lower surface of multiple buffer plates 213. The bottom end of multiple movable rods 214 is fixedly connected to the upper surface of multiple clamping plates 211. Buffer springs 215 are fixedly connected to the upper surface of the inner interior of multiple buffer boxes 210. Fixed blocks 217 are fixedly connected to the lower surface of two movable boxes 201. A bidirectional lead screw 218 is threadedly connected to the inner sidewall of the two fixed blocks 217. A second motor 219 is fixedly connected to the rear surface of the fixed frame 4. The front end of the output shaft of the second motor 219 is fixedly connected to the rear end of the bidirectional lead screw 218. The front end of the bidirectional lead screw 218 is rotatably connected to the front surface of the inner sidewall of the fixed frame 4 through a rotating shaft.

[0035] Once the thin-walled car top is placed in the designated position above the operating platform 1, motor 219 drives the bidirectional lead screw 218 to rotate, thereby causing the two fixed blocks 217 and the two movable boxes 201 connected to the bottom to move synchronously towards or away from each other. This allows for flexible adjustment of the distance between the two sets of movable boxes 201, thus adapting to thin-walled car tops of different widths and achieving compatible positioning of workpieces of various sizes. Simultaneously, motor 205 drives the adjusting lead screw 203 to rotate inside the movable cavity 202, causing the threaded moving block 207 to move horizontally. The moving block 207, in conjunction with the guide groove 206 and the guide slider 208, completes smooth guiding sliding, further fine-tuning the front and rear clamping positions of the clamping plate 211 to meet the requirements. To meet the clamping requirements of thin-walled car roofs of different lengths, after adjustment, multiple sets of cylinders 212 can drive multiple sets of buffer boxes 210 to move vertically downwards, causing the clamping plate 211 to press down and fit against the side wall of the workpiece to complete the clamping operation. During the clamping process, the clamping plate 211 will push the movable rod 214 and the buffer plate 213 to slide upwards after being subjected to force, and cooperate with the buffer spring 215 to achieve flexible buffering and shock absorption, avoiding excessive rigid clamping pressure that squeezes and damages the surface of the thin-walled car roof. Thus, the clamping distance and clamping position can be adjusted in all directions, and it can stably clamp and position thin-walled car roofs of different lengths and widths. It has strong clamping versatility, and the flexible buffer structure can protect the surface of the thin-walled workpiece, ensuring clamping and positioning accuracy while avoiding workpiece clamping deformation problems.

[0036] like Figure 9 As shown, rubber pads 216 are fixedly connected to the lower surfaces of multiple clamping plates 211;

[0037] The multiple rubber pads 216 can increase the contact friction between the multiple clamping plates 211 and the thin-walled car roof, improve the clamping firmness, and at the same time play a buffering and protective role, avoiding the clamping plates 211 from directly contacting the workpiece and causing scratches and indentations, effectively protecting the surface of the thin-walled car roof.

[0038] like Figure 4 and Figure 6 As shown, the lower surface of the operating platform 1 is symmetrically provided with guide grooves 220. The inner front surface and inner rear surface of the two guide grooves 220 are both fixedly connected to guide rods 221. The outer side walls of the two guide rods 221 are slidably connected to guide sliders 222. The lower surfaces of the multiple guide sliders 222 are respectively fixedly connected to the upper surfaces of the two movable boxes 201.

[0039] When the two movable boxes 201 follow the bidirectional lead screw 218 to adjust the spacing and achieve different sizes of car tops for clamping, the guide slider 222 slides smoothly and linearly along the guide rod 221. This can limit the offset, swaying and deflection of the movable box 201 during its movement, ensuring that the movable box 201 moves smoothly and is accurately positioned, avoiding deviations in the clamping position, improving the stability and alignment accuracy of the overall clamping mechanism 2, and ensuring that subsequent clamping operations are always accurate and reliable.

[0040] like Figure 1 , Figure 4 , Figure 7 , Figure 8 and Figure 9 As shown, the clamping mechanism 3 includes two U-shaped connecting frames 301. The inner walls of the two U-shaped connecting frames 301 are rotatably connected to clamping rollers 302 via rotating shafts. The upper surfaces of the two U-shaped connecting frames 301 are symmetrically provided with movable fixing parts 303. The inner walls of the multiple movable fixing parts 303 are symmetrically provided with clamping plates 304. The opposite sides of two adjacent clamping plates 304 are fixedly connected with rotating rods 305. The inner ends of the multiple rotating rods 305 are rotatably connected to the front and rear surfaces of multiple U-shaped support plates 209 via rotating shafts. The outer walls of the multiple rotating rods 305 are fitted with torsion springs 306. The two ends of the multiple torsion springs 306 are fixedly connected to the outer walls of the multiple clamping plates 304 and the multiple U-shaped support plates 209, respectively. The opposite sides of two adjacent clamping plates 304 are jointly fixedly connected with reinforcing rods 307.

[0041] The inner sidewalls of the two U-shaped connecting frames 301 are provided with through guide grooves 308. The inner front and inner rear surfaces of the two guide grooves 308 are fixedly connected to limit rods 309. The outer sidewalls of the two limit rods 309 are symmetrically connected to guide sliders 310. The upper surfaces of the multiple guide sliders 310 are fixedly connected to the lower surfaces of multiple movable fixing parts 303 respectively.

[0042] During displacement, multiple sets of U-shaped support plates 209 will drive the pressure plate 304, the movable fixing part 303, and the U-shaped connecting frame 301 to move synchronously through the rotating rod 305, thereby driving the two sets of pressure rollers 302 to adjust their positions accordingly. This allows for precise adaptation to thin-walled car roofs of different specifications and overall flattening and constraint of the plate surface, effectively suppressing workpiece curling and deformation. The torsion springs 306 sleeved on the outside of each rotating rod 305 can continuously provide stable elastic preload, ensuring that the pressure rollers 302 are always in close contact with the surface of the thin-walled car roof throughout the operation, ensuring uniform flattening effect. When placing the workpiece, the operator can pull the pressure plates 304 on both sides upward to overcome the elastic force of the multiple sets of torsion springs 306, causing the pressure rollers 302 to be lifted upward to create clearance space, making it easy to place the thin-walled car roof stably at the designated welding point.

[0043] Through the guide grooves 308 opened on the two U-shaped connecting frames 301, together with the limiting slide rods 309 fixed in the grooves and the sliding guide sliders 310, the moving fixed parts 303 can be accurately guided and limited, effectively eliminating the problems of jamming and offset during the movement process, ensuring that multiple sets of U-shaped support plates 209 can complete the relative movement smoothly and stably. The reinforcing rods 307 set between adjacent pressing plates 304 can greatly improve the rigidity and load-bearing capacity of the overall structure, preventing the components from deforming or loosening due to long-term stress. Thus, it can not only achieve adaptive pressing and positioning, but also reliably maintain the flatness of the plate surface, reducing the problem of warping of thin-walled car roofs during welding operations from the source.

[0044] like Figure 1 , Figure 4 and Figure 5 As shown, the upper surface of the operating platform 1 is fixedly connected to the left and right sides of the mounting groove 5 with sliding guide rails 13. The outer side walls of the two sliding guide rails 13 are symmetrically connected to guide rail sliders 14. The upper surface of the multiple guide rail sliders 14 is fixedly connected to support rods 15. The upper surface of the inner side wall of the multiple U-shaped support plates 209 is provided with sliding horizontal grooves 16. The inner left and inner right sides of the multiple sliding horizontal grooves 16 are fixedly connected to sliding rods 17. The outer side walls of the multiple sliding rods 17 are slidably connected to movable sliders 18. The lower surface of the multiple movable sliders 18 is fixedly connected to the top of the multiple support rods 15 respectively.

[0045] By using sliding guide rails 13 and guide rail sliders 14 on the left and right sides of the upper surface of the operating platform 1, the support rod 15 can be basically guided and supported. The top of the support rod 15 is slidably mounted on the sliding rod 17 inside the sliding cross groove 16 through the movable slider 18. When the U-shaped support plate 209 is adjusted and slid, the whole structure can reliably guide and support the U-shaped support plate 209 throughout the process, effectively share the weight of the workpiece and the mechanism itself, reduce the shaking and offset of the parts during operation, reduce the sliding friction resistance, ensure that the movement of the U-shaped support plate 209 is smooth and stable, and make the clamping and pressing actions precise and in place, further improving the stability and reliability of the overall tooling operation.

[0046] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A vacuum adsorption tooling tray for preventing warping during welding of thin-walled car roofs, comprising an operating platform (1), characterized in that: The operating platform (1) is symmetrically provided with clamping mechanisms (2) on the left and right sides of its upper surface, and a pressing mechanism (3) is symmetrically provided at the center of its upper surface. A fixed frame (4) is fixedly connected to the outer wall of the operating platform (1). The upper surface of the operating platform (1) is provided with an installation groove (5). The inner sidewall of the installation groove (5) is fixedly connected to a positioning plate (6) by multiple bolts. The upper surface of the positioning plate (6) is provided with multiple through grooves (7). Each of the multiple grooves (7) is provided with a connecting block (8). The upper surface of each of the multiple connecting blocks (8) is provided with an adsorption hole (9). Each of the multiple connecting blocks (8) is fixedly connected with a connecting pipe (10). The right side of the operating platform (1) is provided with a vacuum interface (11). The left end of the vacuum interface (11) is fixedly connected with a U-shaped connecting pipe (12). The left end of the U-shaped connecting pipe (12) is fixedly connected to the right side of the two connecting blocks (8) on the right side.

2. The vacuum adsorption tooling tray for preventing warping during welding of thin-walled car roofs according to claim 1, characterized in that: The clamping mechanism (2) includes two movable boxes (201). Each movable box (201) has symmetrically arranged movable cavities (202). The inner walls of each movable cavity (202) are rotatably connected to adjusting screws (203) via a rotating shaft. The opposite ends of two adjacent adjusting screws (203) are fixedly connected to a fixing rod (204). A motor (205) is fixedly connected to the left side of each of the two movable boxes (201). The right ends of the output shafts of the two motors (205) are respectively fixed to the left ends of the two adjusting screws (203) on the left side. The two movable cavities (202) are connected by a through guide groove (206) on their inner lower surfaces. The outer walls of the multiple adjusting screws (203) are threaded with moving blocks (207). The lower surfaces of the multiple moving blocks (207) are fixedly connected with guide sliders (208). The lower surfaces of the multiple guide sliders (208) are fixedly connected with U-shaped support plates (209). The inner walls of the multiple U-shaped support plates (209) and above the operating platform (1) are provided with buffer boxes (210). The lower surfaces of the multiple buffer boxes (210) are provided with clamping plates (211).

3. The vacuum adsorption tooling tray for preventing warping during welding of thin-walled car roofs according to claim 2, characterized in that: A cylinder (212) is fixedly connected to the upper surface of each of the multiple U-shaped support plates (209). The bottom end of the output shaft of each of the multiple cylinders (212) is fixedly connected to the upper surface of each of the multiple buffer boxes (210). A buffer plate (213) is slidably connected inside each of the multiple buffer boxes (210). A movable rod (214) is fixedly connected to the lower surface of each of the multiple buffer plates (213). The bottom end of each of the multiple movable rods (214) is fixedly connected to the upper surface of each of the multiple clamping plates (211). A buffer spring (215) is fixedly connected to the upper surface of the inner interior of each of the multiple buffer boxes (210).

4. The vacuum adsorption tooling tray for preventing warping during welding of thin-walled car roofs according to claim 2, characterized in that: Rubber pads (216) are fixedly connected to the lower surfaces of the plurality of clamps (211).

5. A vacuum adsorption tooling tray for preventing warping during welding of thin-walled car roofs according to claim 2, characterized in that: The lower surfaces of the two movable boxes (201) are fixedly connected with fixed blocks (217), and the inner walls of the two fixed blocks (217) are threadedly connected with a bidirectional lead screw (218). The rear surface of the fixed frame (4) is fixedly connected with a second motor (219). The front end of the output shaft of the second motor (219) is fixedly connected to the rear end of the bidirectional lead screw (218), and the front end of the bidirectional lead screw (218) is rotatably connected to the front surface of the inner wall of the fixed frame (4) through a rotating shaft.

6. A vacuum adsorption tooling tray for preventing warping during welding of thin-walled car roofs according to claim 5, characterized in that: The lower surface of the operating platform (1) is symmetrically provided with guide grooves (220). The inner front surface and inner rear surface of the two guide grooves (220) are fixedly connected with guide rods (221). The outer side walls of the two guide rods (221) are slidably connected with guide sliders (222). The lower surfaces of the multiple guide sliders (222) are respectively fixedly connected to the upper surfaces of the two movable boxes (201).

7. A vacuum adsorption tooling tray for preventing warping during welding of thin-walled car roofs according to claim 2, characterized in that: The clamping mechanism (3) includes two U-shaped connecting frames (301). The inner walls of the two U-shaped connecting frames (301) are rotatably connected to clamping rollers (302) via rotating shafts. The upper surfaces of the two U-shaped connecting frames (301) are symmetrically provided with movable fixing parts (303). The inner walls of the multiple movable fixing parts (303) are symmetrically provided with clamping plates (304). Rotating rods (305) are fixedly connected to the opposite sides of two adjacent clamping plates (304). The inner ends of the plurality of rotating rods (305) are respectively rotatably connected to the front and rear surfaces of the plurality of U-shaped support plates (209) via rotating shafts. The outer side walls of the plurality of rotating rods (305) are all fitted with torsion springs (306). The two ends of the plurality of torsion springs (306) are respectively fixedly connected to the outer side walls of the plurality of pressing plates (304) and the plurality of U-shaped support plates (209). The opposite sides of two adjacent pressing plates (304) are jointly fixedly connected with reinforcing rods (307).

8. A vacuum adsorption tooling tray for preventing warping during welding of thin-walled car roofs according to claim 7, characterized in that: The inner sidewalls of the two U-shaped connecting frames (301) are provided with through guide grooves (308). The inner front and inner rear surfaces of the two guide grooves (308) are fixedly connected to limit rods (309). The outer sidewalls of the two limit rods (309) are symmetrically connected to guide sliders (310). The upper surfaces of the multiple guide sliders (310) are fixedly connected to the lower surfaces of the multiple movable fixing parts (303).

9. A vacuum adsorption tooling tray for preventing warping during welding of thin-walled car roofs according to claim 2, characterized in that: Sliding guide rails (13) are fixedly connected to the upper surface of the operating platform (1) and to the left and right sides of the mounting groove (5). Guide rail sliders (14) are symmetrically slidably connected to the outer side walls of the two sliding guide rails (13). Support rods (15) are fixedly connected to the upper surface of the multiple guide rail sliders (14). Sliding horizontal grooves (16) are opened on the upper surface of the inner side walls of the multiple U-shaped support plates (209). Sliding rods (17) are fixedly connected to the inner left and inner right sides of the multiple sliding horizontal grooves (16). Movable sliders (18) are slidably connected to the outer side walls of the multiple sliding rods (17). The lower surfaces of the multiple movable sliders (18) are fixedly connected to the top ends of the multiple support rods (15).

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