Multi-curved special-shaped metal part forming device and forming process

Abstract

The application discloses a multi-curved-surface special-shaped metal part forming device and a forming process, relates to the technical field of metal part stamping, and comprises a machine tool, a operating table is fixedly installed at the top of the machine tool, a hydraulic cylinder is fixedly installed at the top of the operating table, and a stamping plate is fixedly installed at the bottom of the output end of the hydraulic cylinder; a lower die is arranged at the top of the machine tool, an upper die is arranged at the bottom of the stamping plate, a positioning box is fixedly installed at the top of the machine tool, a hollow box is fixedly installed at the top of the machine tool, a cushion block one is slidably installed on the inner wall of the hollow box, and a cushion block two is slidably installed on the inner wall of the hollow box. The upper die and the lower die cannot be completely attached and stamped through several times of stamping, the cushion blocks are arranged in a sequence from high to low, multiple small-amplitude stamping forming is adopted, the deformation amount of single stamping is reduced, and cracks of the part in the one-time stamping process are prevented.

Description

Technical Field

[0001] This invention relates to the field of metal parts stamping technology, specifically to a multi-curved irregular metal parts forming device and forming process. Background Technology

[0002] Multi-curved irregular metal parts forming equipment is a device specifically designed for manufacturing metal parts with complex curved shapes. This equipment is commonly used in fields such as aerospace, automotive, shipbuilding, and precision machinery, and can efficiently produce complex and precise metal parts.

[0003] Patent publication number CN217070377U relates to a multi-station punching device for forming irregularly shaped parts, including a fixed frame, a device body, and a frame. The top of the fixed frame is fixedly connected to the bottom of the device body, and the bottom of the frame is fixedly connected to the top of the fixed frame. A foot pedal is fixedly connected to the bottom of the device body, and the bottom of the mounting plate is fixedly connected to the top of the frame. Through the designed rotating rod, extension rod, and top plate, the processing head moves downwards during operation, pushing the top plate and extrusion head downwards to punch holes in the sheet metal. When the work is completed, the processing head retracts, causing the extension rod to return to its original position. Furthermore, when different punching heads are needed, the rotating rod can be used to rotate, allowing for punching and use of different materials, thereby improving product processing and reducing working time.

[0004] In the aforementioned patent, the use of a rotating rod allows for punching and processing of different materials, thereby improving product quality and reducing working time. However, when forming irregularly shaped metal parts with multiple curved surfaces, the raw material is relatively thick while the finished product has a relatively thin wall thickness. This results in a large amount of material removal during processing, leading to high material costs and consequently, high production costs for the parts. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a forming device and forming process for multi-curved irregular metal parts, solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-curved irregular metal part forming device, comprising a machine tool, an operating table fixedly mounted on the top of the machine tool, a hydraulic cylinder fixedly mounted on the top of the operating table, and a stamping plate fixedly mounted at the bottom of the output end of the hydraulic cylinder; a lower mold is provided on the top of the machine tool, an upper mold is provided at the bottom of the stamping plate, a positioning box is fixedly mounted on the top of the machine tool, and a hollow box is fixedly mounted on the top of the machine tool; a first pad, a second pad, and a third pad are slidably mounted on the inner wall of the hollow box. A pad four is slidably installed on the inner wall of the hollow box. A square groove is opened on the surface of the hollow box. An elastic telescopic rod is slidably installed on the inner wall of the square groove. A U-shaped groove is opened at the bottom of the inner wall of the hollow box. A sliding block is slidably installed on the inner wall of the U-shaped groove. One end of the elastic telescopic rod is fixedly connected to the driving device, and the other end of the elastic telescopic rod is fixedly connected to the sliding block. A fixed long rod is fixedly installed on the inner wall of the hollow box. Since the pad one, pad two, pad three and pad four are arranged from high to low, when the stamping plate is stamped to the bottom, the first few stampings cannot completely make the upper mold and the lower mold fit together and complete the stamping.

[0007] According to the above technical solution, the surface of the stamping plate is provided with an elongated groove, and a friction block is slidably installed on the inner wall of the elongated groove. The surface of the stamping plate is provided with a sliding groove, and a limit block is slidably installed on the inner wall of the sliding groove. A drive motor is fixedly installed on the top of the limit block. The friction block moves towards the direction of the return spring due to the obstruction of the pad block. Due to the rough design of the surface of the friction block, the friction force increases after the friction block contacts the pad block.

[0008] According to the above technical solution, the sliding block contacts the fixed long rod, and a return spring is provided between the friction block and the long groove, so that the friction block can be reset by the return spring.

[0009] According to the above technical solution, a protective device is provided on the top of the machine tool, and the top of the sliding block is set as an inclined surface.

[0010] According to the above technical solution, the protective device includes: a lock box, two lock cylinders, two L-shaped plates, a transmission plate, an unlocking rod, a bolt, a fixing component, and two triangular blocks. The lock box is fixedly installed on the surface of the lower mold. The two lock cylinders are slidably installed on the inner wall of the lock box. The two L-shaped plates are fixedly installed on the side of the lock cylinders that are close to each other. The unlocking rod slides through the inner and outer walls of the lock box. The transmission plate is fixedly installed on the end of the unlocking rod that is close to the L-shaped plate. The bolt is fixedly installed on the surface of the upper mold. The fixing component is fixedly installed on the surface of the upper mold and the bolt. The fixing component is used to fix the upper mold and the bolt. The bolt is no longer in contact with the lock cylinder. Then, the lock cylinders are reset by the second spring and move away from each other. After the lock cylinders move, they block the top of the bolt, so that the bolt can no longer move to the top. The L-shaped plates move and move the lock cylinders closer to each other. After the lock cylinders move, they no longer limit the bolt, so that the upper mold and the lower mold are released from fixation, and then demolding is completed.

[0011] According to the above technical solution, the protective device further includes: an air cylinder, a transmission rod, and a sealing plate. The air cylinder is fixedly installed on the surface of one of the lock cylinders, and multiple air vents are provided on the surface of the air cylinder. The transmission rod is fixedly installed on the surface of another lock cylinder. The sealing plate is slidably installed on the inner wall of the air cylinder. The transmission rod and the sealing plate are fixedly connected. A telescopic rod is fixedly installed at the bottom of the transmission plate. A collar is fitted onto the circumferential surface of the air cylinder. The free end of the telescopic rod is rotatably connected to the circumferential surface of the collar. The movement of the telescopic rod drives the collar to rotate. After the collar rotates, it blocks some of the air vents. This limits the movement speed of the lock cylinder when it is reset by the first spring due to the difference in air pressure inside and outside the air cylinder and the reduction in air vents. This prevents the collar from rotating when the lock cylinder moves as the bolt moves, as the air inside the air cylinder is expelled.

[0012] According to the above technical solution, a first spring is provided between the two lock cylinders, and the collar contacts part of the air vent. The first spring drives the two lock cylinders to reset.

[0013] According to the above technical solution, the triangular block contacts the L-shaped plate, and the circumferential surface of the collar is provided with an air outlet, through which the air inside the air cylinder is discharged.

[0014] A forming process for a multi-curved irregular metal part forming device includes the following steps:

[0015] Step 1: First, pre-process the parts to be processed, including cutting, deburring, and surface cleaning. Then, put the parts into the heating furnace to reach the required processing temperature. After heating, quickly remove the parts from the furnace and place them on top of the lower mold.

[0016] Step 2: The output end of the hydraulic cylinder drives the upper mold to move and stamp the part. During the stamping process, the stamping plate is blocked by pad block 1, pad block 2, pad block 3 and pad block 4 in sequence, so that the stamping plate will gradually increase the stamping depth and complete the stamping as the number of stampings increases.

[0017] Step 3: After the stamping is completed, the speed of the upper die movement is limited, and it moves slowly to the top. After the hydraulic cylinder returns to the initial position, the stamped part is taken out.

[0018] This invention provides a forming device and forming process for multi-curved irregular metal parts. It has the following beneficial effects:

[0019] (1) In this invention, the lower mold is positioned, and then the hydraulic cylinder is activated. The output end of the hydraulic cylinder moves to the bottom, which drives the stamping plate to move to the bottom. The movement of the stamping plate drives the upper mold to move to the bottom and stamps the part on the top of the lower mold. This prevents the insufficient positioning accuracy of the stamping mold from causing the part to deviate during the stamping process, resulting in processing failure and defective products. The traditional cutting process is abandoned. The part material is heated to a high temperature and then the spatial curved surface structure is pressed into shape by the hydraulic cylinder. After cooling, it is finely engraved and shaped. This can solve the problem of large material removal in the traditional process, save costs, shorten the manufacturing cycle, and ensure quality stability.

[0020] (2) In this invention, by arranging pad 1, pad 2, pad 3 and pad 4 in descending order, the upper and lower dies cannot be fully aligned and the stamping is completed in the first few stampings when the stamping plate is stamped to the bottom. Because the arrangement of pad 1, pad 2, pad 3 and pad 4 is from high to low, the stamping depth will gradually increase and the stamping will be completed as the number of stampings increases. Multiple small-amplitude stampings are used to form the part, reducing the amount of deformation in a single stamping and preventing cracks, stretching or cracking of the part during a single stamping process.

[0021] (3) In this invention, the friction block moves towards the return spring by being blocked by the pad block 1. Due to the rough design of the surface of the friction block, the friction force increases after the friction block contacts the pad block 1. As the stamping plate moves to the top, the initial speed when moving to the top is limited due to the increased friction force. This prevents the upper mold from rapidly releasing the internal residual stress after moving to the top quickly, which would cause cracks in the part. This improves the pass rate of the device and reduces the generation of defective products.

[0022] (4) In this invention, the lock tongue no longer contacts the lock cylinder, and then the lock cylinder is reset by the second spring and moves away from each other. After the lock cylinder moves, it blocks the top of the lock tongue, so that the lock tongue can no longer move to the top. This allows the device to automatically lock itself when the upper mold and the lower mold are in contact during stamping, which is convenient for subsequent workers to pick up and does not require manual operation. It prevents the heat of the parts from being transferred through the lower mold, which could cause injury to workers during operation and improves the safety of the device. The L-shaped plate moves the lock cylinder towards each other. After the lock cylinder moves, it no longer limits the lock tongue, so that the upper mold and the lower mold are released from fixation and demolding is completed. This device can automatically connect the upper mold and the lower mold during stamping and can quickly release and demold after stamping is completed, shortening the manufacturing cycle.

[0023] (5) In this invention, the movement of the telescopic rod drives the collar to rotate. After the collar rotates, it blocks some of the air outlets. When the device is reset, the movement speed of the lock cylinder is limited when it is reset by the No. 1 spring due to the difference in air pressure inside and outside the air cylinder and the reduction of air outlets. This means that after the worker manually presses the unlocking rod, the device will not reset immediately and will lock for a period of time after unlocking. This allows the worker to disassemble the upper mold without continuously pressing the unlocking rod and automatically reset after a period of time, improving the practicality and comfort of the device and further ensuring the safety of the worker during operation. Because of the air outlets on the surface of the collar, when the lock tongue drives the lock cylinder to move, the movement of the lock cylinder drives the air inside the air cylinder to be discharged. Since the collar does not rotate, the reset speed of the device is not limited when it is self-locking, ensuring the reliability of the device when it is self-locking and the stability of its operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the top part of the machine tool according to the present invention;

[0026] Figure 3 This is a schematic diagram of the back structure of the overall device of the present invention;

[0027] Figure 4 This is a schematic diagram of the cross-sectional structure of the hollow box of the present invention;

[0028] Figure 5 For the present invention Figure 3 Enlarged schematic diagram of section A in the middle;

[0029] Figure 6 For the present invention Figure 2 Enlarged schematic diagram of section B;

[0030] Figure 7 This is a schematic diagram of the internal structure of the hollow box of the present invention;

[0031] Figure 8 This is a schematic plan view of the internal structure of the hollow box of the present invention.

[0032] Figure 9 This is a schematic diagram of the cross-sectional structure of the lock box of the present invention;

[0033] Figure 10 This is a schematic diagram of the internal structure of the lock box of the present invention;

[0034] Figure 11 This is a schematic diagram of the protective device of the present invention.

[0035] In the diagram: 1. Machine tool; 2. Operating table; 3. Hydraulic cylinder; 4. Stamping plate; 51. Positioning box; 52. Hollow box; 53. Pad block one; 54. Pad block two; 55. Pad block three; 56. Pad block four; 57. Drive device; 58. Elastic telescopic rod; 59. Sliding block; 510. Fixed long rod; 511. Friction block; 512. Return spring; 513. Limiting block; 514. Drive motor; 61. Lock box; 62. Lock cylinder; 63. L-shaped plate; 64. Transmission plate; 65. Unlocking rod; 66. Lock tongue; 67. Fixing component; 68. Triangular block; 69. Air cylinder; 610. Transmission rod; 611. Sealing plate; 612. Telescopic rod; 613. Collar; 7. Lower mold; 8. Upper mold. Detailed Implementation

[0036] 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.

[0037] Please see Figure 1 - Figure 7One embodiment of the present invention is: a forming device and forming process for multi-curved irregular metal parts, including a machine tool 1, an operating table 2 fixedly installed on the top of the machine tool 1, a hydraulic cylinder 3 fixedly installed on the top of the operating table 2, and a stamping plate 4 fixedly installed at the bottom of the output end of the hydraulic cylinder 3; a lower mold 7 is provided on the top of the machine tool 1, an upper mold 8 is provided at the bottom of the stamping plate 4, a positioning box 51 is fixedly installed on the top of the machine tool 1, and a hollow box 52 is fixedly installed on the top of the machine tool 1 to prevent insufficient positioning accuracy of the stamping die, which could lead to deviation in the position of the part during the stamping process, resulting in processing failure and defective products; a first pad 53 and a second pad 54 are slidably installed on the inner wall of the hollow box 52; the hollow box 52... A pad 3 55 is slidably installed on the inner wall of the hollow box 52, and a pad 4 56 is slidably installed on the inner wall of the hollow box 52. A square groove is opened on the surface of the hollow box 52, and an elastic telescopic rod 58 is slidably installed on the inner wall of the square groove. A U-shaped groove is opened at the bottom of the inner wall of the hollow box 52, and a sliding block 59 is slidably installed on the inner wall of the U-shaped groove. One end of the elastic telescopic rod 58 is fixedly connected to the driving device 57, and the other end of the elastic telescopic rod 58 is fixedly connected to the sliding block 59. A fixed long rod 510 is fixedly installed on the inner wall of the hollow box 52. During stamping, the stamping depth will gradually increase with the number of stampings and the stamping will be completed. Multiple small-amplitude stampings are used to reduce the deformation of a single stamping and prevent cracks, stretching or cracking of parts during a one-time stamping process.

[0038] The surface of the stamping plate 4 is provided with a long groove, and a friction block 511 is slidably installed on the inner wall of the long groove. The surface of the stamping plate 4 is provided with a sliding groove, and a limit block 513 is slidably installed on the inner wall of the sliding groove. A drive motor 514 is fixedly installed on the top of the limit block 513. When the stamping plate 4 moves to the top, the initial speed of the movement to the top is limited due to the increased friction. This prevents the upper mold 8 from rapidly moving to the top and releasing the residual internal stress before the part is formed, which would cause cracks in the part. This improves the pass rate of the equipment and reduces the generation of defective products.

[0039] The sliding block 59 contacts the fixed long rod 510, and a return spring 512 is provided between the friction block 511 and the long groove. The return spring 512 drives the friction block 511 to reset.

[0040] The top of the machine tool 1 is equipped with a protective device, and the top of the sliding block 59 is set as an inclined surface.

[0041] In this embodiment, the parts to be processed are first pre-treated, including cutting, deburring, and surface cleaning. Then, the parts are placed in a heating furnace to reach the required processing temperature. During heating, an oxide layer forms on the surface of the parts, protecting the surface from oxidation and corrosion. After heating, the parts are quickly removed from the furnace and placed on top of the lower mold 7. The lower mold 7 is then pushed inwards, and after moving, it engages with the positioning box 51, fixing its position. Then, the hydraulic cylinder 3 is activated. The output end of the hydraulic cylinder 3 moves downwards, causing the stamping plate 4 to move downwards. The movement of the stamping plate 4 causes the upper mold 8 to move downwards, stamping the parts on top of the lower mold 7 and preventing damage to the mold. Insufficient positioning accuracy leads to deviations in the position of parts during the stamping process, resulting in processing failures and defective products. When the stamping plate 4 moves to the bottom, the drive device 57 moves, causing the elastic telescopic rod 58 to slide on the inner wall of the square groove. The elastic telescopic rod 58 moves, causing the sliding block 59 to move. The sliding block 59 will contact the pad block 53. The sliding block 59 moves, causing the pad block 53 to move to the top. Then, the stamping plate 4 moves to the bottom and contacts the pad block 53. After being blocked by the pad block 53, the stamping plate 4 cannot continue to move to the bottom, making it impossible for the upper mold 8 and the lower mold 7 to fit completely. Then, the output end of the hydraulic cylinder 3 drives the stamping plate 4 to move to the top. Then, the drive device 57 continues to move, causing the sliding block 59 to continue to move and contact the pad block 54. This causes the second pad 54 to be lifted when it contacts the sliding block 59, so that when the stamping plate 4 presses down again, it will contact the second pad 54. As the stamping plate 4 moves up, the drive device 57 continues to move, lifting the third pad 55. When the stamping plate 4 presses down again, it will contact the third pad 55. When the stamping plate 4 presses down again, it will contact the fourth pad 56, lifting it. At this time, when the stamping plate 4 moves down, it drives the upper mold 8 to press down and completely fit with the lower mold 7. After the stamping plate 4 moves up, the drive device 57 returns to the initial position through the return groove. Since the arrangement order of the first pad 53, the second pad 54, the third pad 55 and the fourth pad 56 is from high to low... Therefore, when the stamping plate 4 is stamping towards the bottom, the first few stampings cannot completely bring the upper mold 8 and lower mold 7 together to complete the stamping. Because the arrangement of pads 1 (53), 2 (54), 3 (55), and 4 (56) is from high to low, the stamping depth gradually increases with each stamping cycle, completing the stamping process. Multiple small-amplitude stampings are used to reduce deformation in a single stamping, preventing cracks, stretching, or splitting of the parts during a single stamping process. The movement of the stamping plate 4 towards the bottom causes the friction block 511 to move towards the bottom. The friction block 511 will contact pad 1 (53) and, blocked by pad 1 (53), will move towards the return spring 512. Due to the rough surface design of the friction block 511…This increases the friction force between friction block 511 and pad block 53, limiting the initial speed of the stamping plate 4 as it moves upwards. This prevents the upper mold 8 from rapidly releasing residual stress before the part is fully formed, thus preventing cracks from forming. This improves the yield rate of the equipment and reduces the number of defective products.

[0042] Please see Figure 1 - Figure 11 Based on the above embodiments, in another embodiment of the present invention, the protective device includes: a lock box 61, two lock cylinders 62, two L-shaped plates 63, a transmission plate 64, an unlocking rod 65, a bolt 66, a fixing member 67, and two triangular blocks 68. The lock box 61 is fixedly installed on the surface of the lower mold 7. The two lock cylinders 62 are slidably installed on the inner wall of the lock box 61. The two L-shaped plates 63 are fixedly installed on the side of the lock cylinders 62 that are close to each other. The unlocking rod 65 slides through the inner and outer walls of the lock box 61. The transmission plate 64 is fixedly installed on the end of the unlocking rod 65 near the L-shaped plate 63. The bolt 66 is fixedly installed on... On the surface of the upper mold 8, the fixing member 67 is fixedly installed on the surface of the upper mold 8 and the locking tongue 66. The fixing member 67 is used to fix the upper mold 8 and the locking tongue 66, so that when the device is stamping, it will automatically lock itself when the upper mold 8 and the lower mold 7 come into contact, which is convenient for subsequent workers to pick up and does not require manual operation. This prevents the heat of the parts from being transferred through the lower mold 7, which could cause injury to workers during operation, and improves the safety of the device. The device can automatically connect the upper mold 8 and the lower mold 7 during stamping and can quickly release and demold after stamping is completed, shortening the manufacturing cycle.

[0043] The protective device also includes: an air cylinder 69, a transmission rod 610, and a sealing plate 611. The air cylinder 69 is fixedly installed on the surface of one of the lock cylinders 62, and multiple air outlets are provided on the surface of the air cylinder 69. The transmission rod 610 is fixedly installed on the surface of the other lock cylinder 62. The sealing plate 611 is slidably installed on the inner wall of the air cylinder 69. The transmission rod 610 and the sealing plate 611 are fixedly connected. A telescopic rod 612 is fixedly installed at the bottom of the transmission plate 64. A collar 613 is fitted onto the circumferential surface of the air cylinder 69. The free end of the telescopic rod 612 is rotatably connected to the circumferential surface of the collar 613. The device will not immediately reset and will lock for a period of time after unlocking, so that workers do not need to continuously press the unlocking rod 65 when disassembling the upper mold 8. It will automatically reset after a period of time, improving the practicality and comfort of the device during use, further ensuring the safety of the workers during operation, and ensuring that the reset speed of the device is not limited when it is self-locking, thus ensuring the reliability and stability of the device during operation.

[0044] A first spring is provided between the two lock cylinders 62. The collar 613 contacts part of the air vent, and the first spring drives the two lock cylinders 62 to reset.

[0045] The triangular block 68 contacts the L-shaped plate 63, and the circumferential surface of the collar 613 is provided with an air outlet, through which the air inside the air cylinder 69 is discharged.

[0046] In this embodiment, during operation: the upper mold 8 moves to the bottom, causing the locking tongue 66 to move to the bottom as well. The locking tongue 66, moving to the bottom, contacts the lock cylinder 62. This movement of the locking tongue 66 then causes the lock cylinder 62 to move closer together. Once the upper mold 8 reaches its lowest point, the locking tongue 66 no longer contacts the lock cylinder 62. Subsequently, the lock cylinder 62, via a second spring, resets and moves away from the lock cylinder. This movement of the lock cylinder 62 blocks the top of the locking tongue 66, preventing it from moving upwards. This allows the device to automatically lock itself when the upper mold 8 contacts the lower mold 7 during stamping, facilitating subsequent handling by workers without requiring manual operation. It also prevents heat transfer from the parts through the lower mold 7, thus protecting the workpiece from damage. To prevent worker injuries during operation and improve device safety, after the parts cool down, manually pressing the unlocking lever 65 moves the transmission plate 64 towards the L-shaped plate 63. The transmission plate 64 then moves the triangular block 68 towards the L-shaped plate 63. The triangular block 68 contacts the L-shaped plate 63, causing it to move closer together. This movement of the L-shaped plate 63 then moves the lock cylinder 62 closer together. After the lock cylinder 62 moves, it no longer limits the locking tongue 66, releasing the upper mold 8 from the lower mold 7, thus completing demolding. This device can automatically connect the upper mold 8 and lower mold 7 during stamping and quickly release them after stamping, shortening the manufacturing cycle and increasing production capacity. Before stamping begins, the upper mold 8 is pushed into the limiting block 513. The groove inside the limiting block 513 limits the upper mold 8. After the upper mold 8 and the lower mold 7 are in contact, the drive motor 514 drives the limiting block 513 to move away from each other. Then, after the upper mold 8 and the lower mold 7 are connected and locked by the protective device, the limiting block 513 no longer limits the upper mold 8. This makes it convenient to refill the upper mold 8 and the lower mold 7 and stamp them again when the mold is taken out and cooled, improving the practicality and efficiency of the device. The movement of the lock core 62 drives the transmission rod 610 and the air cylinder 69 to move towards the center position. The movement of the transmission rod 610 drives the sealing plate 611 to move. The movement of the sealing plate 611 will squeeze... Air inside the air cylinder 69 is expelled through the vent. The movement of the transmission plate 64 drives the telescopic rod 612 to move, which in turn drives the collar 613 to rotate. The rotating collar 613 partially blocks the vent, thus limiting the movement speed of the lock cylinder 62 during reset due to the pressure difference inside and outside the air cylinder 69 and the reduced number of vents. This prevents the device from immediately resetting after the operator manually presses the unlocking lever 65, and instead locks for a period after unlocking. This eliminates the need for continuous pressing of the unlocking lever 65 when disassembling the upper mold 8, and the device automatically resets after a certain time, improving its practicality and comfort, and further ensuring operator safety.Because of the air vents on the surface of the collar 613, when the latch 66 moves the lock cylinder 62, and the movement of the lock cylinder 62 causes air to be expelled from the air cylinder 69, the collar 613 does not rotate. This ensures that the reset speed of the device is not limited during self-locking, guaranteeing the reliability and stability of the device during operation.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A forming device for multi-curved irregular metal parts, comprising a machine tool (1), characterized in that: An operating table (2) is fixedly installed on the top of the machine tool (1), and a hydraulic cylinder (3) is fixedly installed on the top of the operating table (2). A stamping plate (4) is fixedly installed at the bottom of the output end of the hydraulic cylinder (3). A lower mold (7) is provided on the top of the machine tool (1), and an upper mold (8) is provided at the bottom of the stamping plate (4). A positioning box (51) is fixedly installed on the top of the machine tool (1). A hollow box (52) is fixedly installed on the top of the machine tool (1). A pad block one (53) is slidably installed on the inner wall of the hollow box (52), and a pad block two (54) is slidably installed on the inner wall of the hollow box (52). A pad three (55) is slidably installed on the inner wall of the box (52), a pad four (56) is slidably installed on the inner wall of the hollow box (52), a square groove is opened on the surface of the hollow box (52), an elastic telescopic rod (58) is slidably installed on the inner wall of the square groove, a loop groove is opened at the bottom of the inner wall of the hollow box (52), a sliding block (59) is slidably installed on the inner wall of the loop groove, one end of the elastic telescopic rod (58) is fixedly connected to the driving device (57), the other end of the elastic telescopic rod (58) is fixedly connected to the sliding block (59), and a fixed long rod (510) is fixedly installed on the inner wall of the hollow box (52). The top of the machine tool (1) is provided with a protective device, and the top of the sliding block (59) is set as an inclined surface. The protective device includes: a lock box (61), two lock cylinders (62), two L-shaped plates (63), a transmission plate (64), an unlocking rod (65), a lock tongue (66), a fixing piece (67), and two triangular blocks (68). The lock box (61) is fixedly installed on the surface of the lower mold (7). The two lock cylinders (62) are slidably installed on the inner wall of the lock box (61). The L-shaped plate (63) is fixedly installed on the side of the lock cylinder (62) that is close to each other. The unlocking rod (65) slides through the inner and outer walls of the lock box (61). The transmission plate (64) is fixedly installed on the end of the unlocking rod (65) near the L-shaped plate (63). The lock tongue (66) is fixedly installed on the surface of the upper mold (8). The fixing member (67) is fixedly installed on the surface of the upper mold (8) and the lock tongue (66). The fixing member (67) is used to fix the upper mold (8) and the lock tongue (66). The protective device further includes: an air cylinder (69), a transmission rod (610), and a sealing plate (611). The air cylinder (69) is fixedly installed on the surface of one of the lock cylinders (62), and the surface of the air cylinder (69) has multiple air outlets. The transmission rod (610) is fixedly installed on the surface of the other lock cylinder (62). The sealing plate (611) is slidably installed on the inner wall of the air cylinder (69). The transmission rod (610) and the sealing plate (611) are fixedly connected. A telescopic rod (612) is fixedly installed at the bottom of the transmission plate (64). A collar (613) is sleeved on the circumferential surface of the air cylinder (69). The free end of the telescopic rod (612) is rotatably connected to the circumferential surface of the collar (613). A first spring is provided between the two lock cylinders (62). The collar (613) is in contact with part of the air outlet. The triangular block (68) is in contact with the L-shaped plate (63). An air outlet is opened on the circumferential surface of the collar (613).

2. The forming device for multi-curved irregular metal parts according to claim 1, characterized in that: The surface of the stamping plate (4) is provided with a long groove, and a friction block (511) is slidably installed on the inner wall of the long groove. The surface of the stamping plate (4) is provided with a sliding groove, and a limit block (513) is slidably installed on the inner wall of the sliding groove. A drive motor (514) is fixedly installed on the top of the limit block (513).

3. The forming device for multi-curved irregular metal parts according to claim 2, characterized in that: The sliding block (59) is in contact with the fixed long rod (510), and a return spring (512) is provided between the friction block (511) and the long groove.

4. A forming process for a multi-curved irregular metal parts forming device, using the multi-curved irregular metal parts forming device as described in claim 3, characterized in that... Includes the following steps: Step 1: First, pre-process the parts to be processed, including cutting, deburring, and surface cleaning. Then, put the parts into the heating furnace to reach the required processing temperature. After heating, quickly take the parts out of the furnace and place them on the top of the lower mold (7). Step 2: The output end of the hydraulic cylinder (3) drives the upper mold (8) to move and stamp the part. During the stamping process, the stamping plate (4) is blocked by the first pad (53), the second pad (54), the third pad (55) and the fourth pad (56) in sequence, so that the stamping plate (4) will gradually increase the stamping depth and complete the stamping as the number of stampings increases. Step 3: After the stamping is completed, the speed of the upper die (8) is limited, and it moves slowly to the top. After the hydraulic cylinder (3) returns to the initial position, the stamped part is taken out.

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