A pre-rolling hemming press device and system

Abstract

The application discloses a pre-rolling flanging and pressing device and system, and belongs to the technical field of workpiece pre-rolling flanging. The pre-rolling flanging and pressing device comprises a pressing module, a pressing cylinder and a turnover module. The turnover module comprises a frame, a connecting rod, a rotating arm and a turnover cylinder. The pressing module comprises a mounting plate and a profiling pressing block. Under the action of the pressing cylinder and the turnover cylinder, the profiling pressing block acts on the flanging crease position of the workpiece. The free edge of the profiling pressing block is provided with a crease contour matched with the flanging crease of the workpiece. The pre-rolling flanging system comprises a support frame, a tire membrane and at least one pre-rolling flanging and pressing device. The pressing device can accurately position the flanging crease position of the large-flanging workpiece, so that the pre-rolling flanging of the workpiece can also be directly realized by using a robot to roll flange. The pre-rolling flanging efficiency of the large-flanging workpiece is improved. Moreover, the profiling pressing block is matched according to the flanging of the workpiece, the consistency of the pre-rolling flanging crease position is ensured, and the pre-rolling flanging quality of the workpiece is improved.

Description

Technical Field

[0001] This invention relates to a pre-rolling and flanging clamping device and system, belonging to the field of workpiece pre-rolling technology. Background Technology

[0002] Robotic hemming and pressing technology is widely used in automobile production because it requires fewer hemming dies, has relatively lower investment and maintenance costs for hemming units, shorter preparation time for development and deployment, and offers greater flexibility.

[0003] When the flanging angle is small, such as no more than 105 degrees, a robot can be used to flanging the workpiece directly. Robotic flanging involves a robot carrying a flanging tool to fold the workpiece. However, not all flanging can be done in one step using robot flanging and pressing technology. When the flanging angle of the workpiece is too large, such as exceeding 120 degrees, the flanging crease position cannot be accurately located due to the large flanging angle. If a robot is used directly, it often cannot meet the requirements for the flanging quality of the workpiece.

[0004] Existing methods for hemming large-flanged workpieces cannot be directly implemented using robots; a pre-rolling and flanging process is generally required. The traditional approach involves using a specialized mechanical mechanism to push the workpiece's flanging angle to within 120°, or even within 105°, before transferring it to the robot hemming process for normal hemming. This mechanical mechanism has a high output force, often achieved through a hydraulic system, and lacks versatility, making it difficult to meet the needs of multi-model co-production lines. Finding a way to directly utilize robots for hemming large-flanged workpieces is a pressing technical problem that needs to be solved. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a pre-rolling and flanging clamping device and a pre-rolling and flanging system.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a pre-rolling and flanging clamping device, comprising a clamping module, a clamping cylinder for driving the clamping module to clamp or loosen the workpiece, and a flipping module for driving the clamping module to flip.

[0007] The flipping module includes a frame, a connecting rod, a pair of rotating arms, and a flipping cylinder for driving the rotating arms to rotate. The middle part of the rotating arm is hinged to the frame, the two ends of the connecting rod are respectively connected to one end of the pair of rotating arms, and the other end of the rotating arm is hinged to the piston rod of the flipping cylinder.

[0008] The clamping module includes a mounting plate and a contouring block disposed on the mounting plate. The mounting plate is connected to the connecting rod via the clamping cylinder. The cylinder body of the clamping cylinder is connected to the connecting rod, and the piston rod of the clamping cylinder is connected to the mounting plate. Under the action of the clamping cylinder and the flipping cylinder, the contouring block acts on the folded edge of the workpiece. The free edge of the contouring block is provided with a folded edge profile that matches the folded edge of the workpiece.

[0009] The beneficial effects of this invention are as follows: the flipping module flips the clamping module outward to avoid interfering with the placement of the workpiece. After the workpiece is placed in place, the flipping module can flip the clamping module inward, so that the clamping module flips to the top of the workpiece. The clamping cylinder is activated, the contouring block moves, and the crease contour on the free edge of the contouring block moves to the crease position of the workpiece and clamps the crease position of the workpiece. The crease contour on the contouring block accurately locates the crease position and trajectory of the workpiece. Then, the workpiece can be pre-rolled and folded directly by the robot carrying the rolling tool, without the need for other rolling mechanical structures. The pre-rolling and folding process can be carried out in multiple passes to meet the requirements of pre-rolling and folding quality. After the pre-rolling and folding process of the workpiece is completed, the workpiece is rolled to within 120 degrees. If the workpiece is rolled to within 105 degrees, the workpiece can be moved to the normal rolling process and the robot rolls the edge to complete the workpiece edge wrapping operation. This clamping device can accurately locate the flanging crease position of large-flanged workpieces, preparing them for robot rolling. This allows the pre-rolling flanging of workpieces to be directly achieved using robot rolling, which not only improves the pre-rolling flanging efficiency of large-flanged workpieces, but also allows the contouring block to be matched according to the flanging crease position of the workpiece. The structure is simple, the investment is low, and it ensures the consistency of the pre-rolling flanging crease position of the workpiece, improving the pre-rolling flanging quality of the workpiece. At the same time, it has strong versatility and can realize the co-production of multiple car models, resulting in a high degree of flexibility and automation in the edge binding of automotive parts.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the flipping module also includes a rotating shaft and a pair of hinge rods. The rotating shaft is rotatably mounted on the frame. The piston rod of the flipping cylinder is connected to the rotating shaft. One end of each of the pair of hinge rods is respectively hinged to a pair of rotating arms, and the other end is respectively connected to the rotating shaft.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the rotating arm rotates with the rotating shaft, which can be achieved by connecting the rotating arm to the rotating shaft via a key. The tilting cylinder transmits power to the two rotating arms by driving the rotating shaft. Only one tilting cylinder is needed to drive the rotation of the clamping module. A pair of hinged rods and rotating arms transmit the power of the tilting cylinder to both ends of the connecting rod. The space between the connecting rod and the rotating shaft facilitates the robot's pre-rolling and flanging operation on the workpiece.

[0013] Furthermore, at least one guide mechanism is provided between the connecting rod and the mounting plate. The guide mechanism includes a guide rod and a guide seat. The guide seat is disposed on the connecting rod or the mounting plate, and the guide rod is disposed on the mounting plate or the connecting rod.

[0014] The beneficial effect of adopting the above-mentioned further solution is that at least one guiding mechanism guides the reciprocating motion of the conforming pressure block, enabling the conforming pressure block to travel along a set path, and can further reduce the radial force of the reciprocating motion of the pressing module on the pressing cylinder, thereby extending the service life of the pressing cylinder.

[0015] Furthermore, the contouring block has an integral structure or a split structure.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the contouring pressure block can be a single piece or it can consist of multiple pieces, which can be selected according to the length and trajectory of the flange on the workpiece and the manufacturing cost of the contouring pressure block.

[0017] Furthermore, the contouring block, which has a split structure, includes multiple blocks, and the free edges of the multiple blocks form the crease contour.

[0018] The advantages of adopting the above-mentioned further solution are that the split structure contouring pressure block can be made by splicing multiple pressure blocks together. Not only can the crease contour that matches the workpiece's folding crease be formed by splicing, which can meet the pressing requirements of the workpiece's pre-rolling folding, but it is also more convenient to process and obtain materials, has lower processing costs, and is easier to maintain.

[0019] Furthermore, the contouring block is connected to the mounting plate via at least one connecting block.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the contouring pressure block is specifically connected to the mounting plate through connecting blocks, and the number of connecting blocks can be selected according to the actual installation position and installation space. The connecting blocks achieve the positional installation between the contouring pressure block and the mounting plate, ensuring that when the tilting cylinder and clamping cylinder are activated, the free end of the contouring pressure block can accurately press against the folded edge of the workpiece.

[0021] Furthermore, the frame is also provided with a limiting mechanism that acts on the connecting rod and can limit the lower limit position of the connecting rod. The limiting mechanism includes a limiting block, which is disposed on the frame.

[0022] The beneficial effect of adopting the above-mentioned further solution is that by limiting the lower limit of the contouring block by the limiting block, the pressing module is ensured to stop at a precise position, that is, the contouring block can accurately press on the folded edge of the workpiece, avoiding damage to the workpiece by excessive lowering of the contouring block.

[0023] Furthermore, the limiting mechanism also includes a buffer spring, which is mounted on the frame via a spring seat.

[0024] The beneficial effect of adopting the above-mentioned further solution is that the buffer spring can reduce the impact of the connecting rod on the limiting block, and has the function of vibration reduction and noise reduction.

[0025] Furthermore, the piston rod of the tilting cylinder is connected to the rotating shaft via a crank arm, one end of which is hinged to the piston rod of the tilting cylinder, and the other end is keyed to the rotating shaft.

[0026] The beneficial effect of adopting the above-mentioned further solution is that the rotation of the rotating shaft is achieved by a crank arm, and the tilting cylinder is specifically connected to the frame via a cylinder seat. The cylinder seat is mounted on the frame, and the cylinder body of the tilting cylinder is hinged to the cylinder seat.

[0027] Furthermore, the middle part of the rotating arm is hinged to the frame via a hinge shaft.

[0028] The advantage of adopting the above-mentioned further solution is that the rotating arm can be installed on the frame by means of the hinge shaft.

[0029] Furthermore, the clamping cylinder is a guide rod cylinder.

[0030] The advantages of adopting the above-mentioned further solution are that it has a simple and compact structure, has its own guiding function, high guiding accuracy, avoids lateral deviation of the conforming pressure block during the movement process, ensures the accuracy of the workpiece clamping position, and can withstand large radial loads and torques.

[0031] The present invention also relates to a pre-rolling and flanging system, including a support frame and a mold disposed on the support frame for supporting the workpiece, and further including at least one pre-rolling and flanging clamping device as described above, wherein the pre-rolling and flanging clamping device is disposed on the support frame or the mold, and the contouring pressure block of the pre-rolling and flanging clamping device acts on the flanging crease position of the workpiece.

[0032] The beneficial effects of this invention are: the clamping device has a simple structure, is easy to operate, has low cost, and is easy to maintain. The use of the clamping device can accurately position the flanging position of the large flanging workpiece, so that the pre-rolling flanging of the large flanging workpiece can also be directly carried out using robot rolling technology, which not only improves the processing efficiency of the pre-rolling flanging of the large flanging workpiece, but also further improves the quality of the pre-rolling flanging of the large flanging workpiece. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the pressing device of the present invention;

[0034] Figure 2 This is a schematic diagram of the pressing module of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the flipping module of the present invention;

[0036] Figure 4 This is a three-dimensional structural diagram of the contour pressing block at angle one of the present invention;

[0037] Figure 5 This is a three-dimensional structural diagram of the contour pressing block at angle two of the present invention;

[0038] Figure 6 This is a schematic diagram of the pressing device of the present invention in action on the workpiece.

[0039] Figure 7 This is a schematic diagram of the pre-rolling and flanging system of the present invention;

[0040] Figure 8 This is a schematic diagram of the structure of the membrane of the pre-rolling and flanging system of the present invention;

[0041] Figure 9 This is a schematic diagram of the workpiece's structure;

[0042] In the diagram, 1. Mounting plate; 2. Contouring pressure block; 201. Crease outline; 3. Clamping cylinder; 4. Connecting rod; 5. Rotating arm; 6. Hinge shaft; 7. Hinge rod; 8. Rotating shaft; 9. Frame; 10. Tilting cylinder; 11. Crank arm; 12. Buffer spring; 13. Limiting block; 14. Guide rod; 15. Guide seat; 16. Connecting block; 17. Support frame; 18. Membrane; 19. Workpiece; 191. Flanged edge. Detailed Implementation

[0043] The principles and features of the present invention are described below with reference to examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0044] like Figures 1-6As shown, a pre-rolling and flanging clamping device includes a clamping module, a clamping cylinder 3 for driving the clamping module to clamp or release the workpiece, and a flipping module for driving the clamping module to flip.

[0045] The flipping module includes a frame 9, a connecting rod 4, a pair of rotating arms 5, and a flipping cylinder 10 for driving the rotating arms 5 to rotate. The middle part of the rotating arm 5 is hinged to the frame 9. The two ends of the connecting rod 4 are respectively connected to one end of the pair of rotating arms 5, and the other end of the rotating arm 5 is hinged to the piston rod of the flipping cylinder 10.

[0046] The clamping module includes a mounting plate 1 and a contouring block 2 disposed on the mounting plate 1. The mounting plate 1 is connected to the connecting rod 4 via the clamping cylinder 3. Specifically, the cylinder body of the clamping cylinder 3 is connected to the connecting rod 4, and the piston rod of the clamping cylinder 3 is connected to the mounting plate 1. Under the action of the clamping cylinder 3 and the flipping cylinder 10, the contouring block 2 acts on the folded edge of the workpiece. The free edge of the contouring block 2 is provided with a folded edge contour 201 that matches the folded edge of the workpiece.

[0047] The flipping module also includes a rotating shaft 8 and a pair of hinged rods 7. The rotating shaft 8 is rotatably mounted on the frame 9. The piston rod of the flipping cylinder 10 is connected to the rotating shaft 8. One end of each of the pair of hinged rods 7 is hinged to a pair of rotating arms 5, and the other end is connected to the rotating shaft 8. The rotating arms 5 rotate with the rotating shaft 8, which can be achieved by connecting the rotating arms 5 to the rotating shaft 8 via a key. The flipping cylinder 10 transmits power to the two rotating arms 5 by driving the rotating shaft 8. Only one flipping cylinder 10 is needed to drive the rotation of the clamping module. The pair of hinged rods 7 and the rotating arms 5 transmit the power of the flipping cylinder 10 to both ends of the connecting rod 4. The space between the connecting rod 4 and the rotating shaft 8 facilitates the robot's pre-rolling and flipping operation on the workpiece.

[0048] At least one guiding mechanism is also provided between the connecting rod 4 and the mounting plate 1. The guiding mechanism includes a guide rod 14 and a guide seat 15. The guide seat 15 is disposed on the connecting rod 4 or the mounting plate 1, and the guide rod 14 is disposed on the mounting plate 1 or the connecting rod 4. At least one guiding mechanism guides the reciprocating motion of the contouring block 2, enabling the contouring block 2 to travel along a set path. It can also further reduce the radial force of the reciprocating motion of the pressing module on the pressing cylinder 3, and extend the service life of the pressing cylinder 3.

[0049] The contouring pressure block 2 can be a single piece or a split structure. The contouring pressure block 2 can be a single piece or it can consist of multiple pieces, depending on the length and trajectory of the flange on the workpiece and the manufacturing cost of the contouring pressure block 2.

[0050] The profile pressing block 2, which has a split structure, includes multiple pressing blocks, the free edges of which form the crease contour 201. The split-structure profile pressing block 2 can be constructed by combining multiple pressing blocks, which not only forms a crease contour 201 that matches the workpiece's flanging crease through splicing, thus meeting the pressing requirements for pre-rolling and flanging of the workpiece, but also allows for easier material sourcing, lower processing costs, and easier maintenance.

[0051] The contouring pressure block 2 is connected to the mounting plate 1 via at least one connecting block 16. Specifically, the contouring pressure block 2 is connected to the mounting plate 1 via connecting blocks 16, and the number of connecting blocks 16 can be selected according to the actual installation position and space. The connecting blocks 16 ensure the proper positioning of the contouring pressure block 2 and the mounting plate 1, allowing the free end of the contouring pressure block 2 to accurately press against the folded edge of the workpiece when the flipping cylinder 10 and the clamping cylinder 3 are activated.

[0052] Figure 2 , Figure 4 and Figure 5 Multiple contouring blocks 2 are provided, with a certain gap between adjacent blocks. Each block is connected to the mounting plate 1 via at least one connecting block 16. The figure shows that each block is mounted on the mounting plate 1 via three connecting blocks 16: a first connecting block 16, a second connecting block 16, and a third connecting block 16. The position of the contouring blocks 2 can be adjusted via the connecting blocks 16 so that after the flipping cylinder 10 and the clamping cylinder 3 of the clamping device are activated, the crease contour 201 of the contouring blocks 2 can be accurately positioned at the crease of the workpiece.

[0053] The frame 9 is also provided with a limiting mechanism that acts on the connecting rod 4 and limits the lower limit position of the connecting rod 4. The limiting mechanism includes a limiting block 13, which is disposed on the frame 9. By limiting the lower limit of the contouring pressure block 2 through the limiting block 13, it is ensured that the pressing module stops at a precise position, that is, the contouring pressure block 2 can accurately press on the folded edge of the workpiece, avoiding damage to the workpiece by excessively lowering the contouring pressure block 2.

[0054] The limiting mechanism also includes a buffer spring 12, which is mounted on the frame 9 via a spring seat. The buffer spring 12 reduces the impact of the connecting rod 4 on the limiting block 13, thus having the function of vibration reduction and noise reduction.

[0055] The piston rod of the tilting cylinder 10 is connected to the rotating shaft 8 via a crank arm 11. One end of the crank arm 11 is hinged to the piston rod of the tilting cylinder 10, and the other end is keyed to the rotating shaft 8. The crank arm 11 enables the rotation of the rotating shaft 8. Specifically, the tilting cylinder 10 is connected to the frame 9 via a cylinder seat. The cylinder seat is mounted on the frame 9, and the cylinder body of the tilting cylinder 10 is hinged to the cylinder seat.

[0056] The middle part of the rotating arm 5 is hinged to the frame 9 via a hinge shaft 6. The rotating arm 5 is rotatably mounted on the frame 9 via the hinge shaft 6.

[0057] The clamping cylinder 3 adopts a guide rod cylinder 14. It has a simple and compact structure, and has its own guiding function with high guiding accuracy. It avoids lateral deviation of the conforming pressure block 2 during the movement process, ensures the accuracy of the workpiece clamping position, and can withstand large radial loads and torques.

[0058] like Figures 7-9 As shown, the present invention also relates to a pre-rolling and flanging system, including a support frame 17 and a mold 18 disposed on the support frame 17 for supporting the workpiece, and further including at least one pre-rolling and flanging pressing device as described above, the pre-rolling and flanging pressing device being disposed on the support frame 17 or the mold 18, the contouring pressing block 2 of the pre-rolling and flanging pressing device acting on the flanging crease position of the workpiece.

[0059] During the working process, when the workpiece is in place, the flipping cylinder 10 is activated, and the clamping module flips to the correct position. Each time it is clamped, it stops at a precise position under the action of the limit mechanism. Then, the clamping cylinder 3 is activated, and the contouring block 2 extends to clamp the workpiece. The crease contour 201 of the contouring block 2 is positioned at the crease position of the large folded workpiece. After that, the robot can carry the rolling tool to pre-roll and fold the workpiece. In order to meet the rolling quality of the workpiece, the pre-roll and fold can be done by multiple rolling passes. After the folding angle is no more than 90 degrees, the workpiece can be transferred to the robot rolling process for normal rolling.

[0060] like Figure 9As shown, the two sides of the sheet metal workpiece 19 cover need to be flanged. The flanging angle 191 is 165 degrees. Two sets of pre-rolling flanging clamping devices are used and are symmetrically arranged. The contouring pressure block 2 uses five pressure blocks. Each pressure block is set on the mounting plate 1 through the connecting block 16. The free end of the pressure block forms a crease contour 201 that corresponds to the flanging crease of the workpiece. During pre-rolling and flanging, the flipping cylinder 10 is activated, and the connecting rod 4 and the clamping module flip outward to avoid interfering with the placement of the workpiece. Then, the workpiece is placed on the mold 18. After the workpiece is accurately positioned, the flipping cylinder 10 is activated, and the connecting rod 4 is flipped above the workpiece through the rotating shaft 8, the hinge rod 7, and the rotating arm 5. Then, the clamping cylinder 3 is activated, and the mounting plate 1 and the contouring block 2 are clamped to the workpiece under the action of the clamping cylinder 3 and the guiding mechanism. The crease contour 201 of the contouring block 2 is pressed against the flanging crease position of the workpiece. Then, the robot carrying the rolling tool can perform pre-rolling and flanging on the workpiece. Three pre-rolling and flanging operations can be performed. For example, if the angle of each pre-rolling and flanging is 25 degrees, the maximum flanging angle after pre-rolling and flanging changes from 165 degrees to 90 degrees, thus completing the pre-rolling and flanging of the workpiece. After the pre-rolling and flanging is completed, the workpiece can be moved to the rolling mold of the rolling process and rolled and flanged by the robot to complete the edge wrapping of the workpiece. The clamping device of this invention has a simple structure, is easy to operate, has low cost, and is easy to maintain. The use of the clamping device can accurately position the flanging position of the large flanging workpiece, so that the pre-rolling flanging of the large flanging workpiece can also be directly carried out using robot rolling technology. This not only improves the processing efficiency of the pre-rolling flanging of the large flanging workpiece, but also further improves the quality of the pre-rolling flanging of the large flanging workpiece.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pre-rolling and flanging clamping device, characterized in that, It includes a clamping module, a clamping cylinder (3) for driving the clamping module to clamp or release the workpiece, and a flipping module for driving the clamping module to flip. The flipping module includes a frame (9), a connecting rod (4), a pair of rotating arms (5) and a flipping cylinder (10) for driving the rotating arms (5) to rotate. The middle part of the rotating arm (5) is hinged to the frame (9), and the two ends of the connecting rod (4) are respectively connected to one end of the pair of rotating arms (5). The other end of the rotating arm (5) is hinged to the piston rod of the flipping cylinder (10). The clamping module includes a mounting plate (1) and a contouring block (2) disposed on the mounting plate (1). The mounting plate (1) is connected to the connecting rod (4) through the clamping cylinder (3). Under the action of the clamping cylinder (3) and the flipping cylinder (10), the contouring block (2) acts on the folding crease of the workpiece. The free side of the contouring block (2) is provided with a crease outline (201) that matches the folding crease of the workpiece. After the workpiece is placed in place, the flipping module can flip the clamping module inward so that the clamping module is flipped above the workpiece. The clamping cylinder (3) is activated, the contouring block (2) moves, and the crease contour (201) on the free edge of the contouring block (2) moves to the crease position of the workpiece and clamps the crease position of the workpiece. The crease contour (201) on the contouring block (2) accurately locates the crease position and trajectory of the workpiece. Then the robot carrying the rolling tool can pre-roll and flip the workpiece.

2. The pre-rolling and flanging clamping device according to claim 1, characterized in that, The flipping module also includes a rotating shaft (8) and a pair of hinge rods (7). The rotating shaft (8) is rotatably mounted on the frame (9). The piston rod of the flipping cylinder (10) is connected to the rotating shaft (8). One end of the pair of hinge rods (7) is respectively hinged to a pair of rotating arms (5), and the other end is respectively connected to the rotating shaft (8).

3. The pre-rolling and flanging clamping device according to claim 1, characterized in that, At least one guide mechanism is provided between the connecting rod (4) and the mounting plate (1). The guide mechanism includes a guide rod (14) and a guide seat (15). The guide seat (15) is disposed on the connecting rod (4) or the mounting plate (1), and the guide rod (14) is disposed on the mounting plate (1) or the connecting rod (4).

4. The pre-rolling and flanging clamping device according to claim 1, 2, or 3, characterized in that, The conforming pressure block (2) has an integral structure or a split structure.

5. The pre-rolling and flanging clamping device according to claim 4, characterized in that, The contouring block (2) with a split structure includes multiple blocks, the free edges of which form the crease profile (201).

6. The pre-rolling and flanging clamping device according to claim 4, characterized in that, The contouring block (2) is connected to the mounting plate (1) via at least one connecting block (16).

7. The pre-rolling and flanging clamping device according to claim 1, 2, or 3, characterized in that, The frame (9) is also provided with a limiting mechanism that acts on the connecting rod (4) and can limit the lower limit position of the connecting rod (4). The limiting mechanism includes a limiting block (13), which is disposed on the frame (9).

8. The pre-rolling and flanging clamping device according to claim 7, characterized in that, The limiting mechanism also includes a buffer spring (12), which is mounted on the frame (9) via a spring seat.

9. The pre-rolling and flanging clamping device according to claim 2, characterized in that, The piston rod of the tilting cylinder (10) is connected to the rotating shaft (8) via a crank arm (11). One end of the crank arm (11) is hinged to the piston rod of the tilting cylinder (10), and the other end is keyed to the rotating shaft (8).

10. A pre-rolling and flanging system, comprising a support frame (17) and a mold (18) disposed on the support frame (17) for supporting a workpiece, characterized in that, It also includes at least one pre-rolling and flanging clamping device as described in any one of claims 1-9, wherein the pre-rolling and flanging clamping device is disposed on the support frame (17) or the diaphragm (18), and the contouring block (2) of the pre-rolling and flanging clamping device acts on the flanging crease position of the workpiece.

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