Stamping device for special-shaped stamping parts

Abstract

The invention relates to the technical field of stamping, and discloses a special-shaped stamping part stamping device which comprises an upper stamping die and a lower stamping die, and a stamping space is formed between the bottom of the upper stamping die and the top of the lower stamping die. A pre-punching module, an air suction valve forming male die, a fine punching module, a chamfering receding structure, an appearance semi-cutting male die and an appearance punching male die are sequentially arranged at the bottom of the upper punching die in the transverse direction of the structure of the upper punching die. The invention discloses a stamping device for special-shaped stamping parts. The multifunctional punching device is formed by a pre-punching module, an air suction valve forming male die, a fine punching module, a chamfering receding structure, an appearance semi-cutting male die and an appearance punching male die which are arranged on an upper punching die, and a first forming hole set, an exhaust valve forming male die, a second forming hole set, a chamfering module, a material returning module and a punching receding space which are arranged on a lower punching die. And in the subsequent stamping process of the material belt, batch production of the material belt can be achieved on the material belt in a progressive stamping mode according to the multiple structural characteristics, and the production efficiency is fully improved.

Description

Technical Field

[0001] The invention relates to the field of stamping technology, in particular to a stamping device for special-shaped stamping parts. Background Art

[0002] Stamping dies are special process equipment used to process materials (metal or non-metal) into parts (or semi-finished products) during cold stamping. They are called cold stamping dies (commonly known as cold stamping dies). Existing special-shaped stamping parts are metal parts manufactured through stamping process after matching with matching dies according to specific shapes and design requirements. They are widely used in many industries such as automobiles, aerospace, electronics, etc., and their application range is very wide.

[0003] In recent years, with the continuous improvement of production quality and efficiency requirements, the traditional single stamping action and multiple stamping dies rotating operation mode is still unable to meet the requirements. Secondly, the stamping die that only realizes a single stamping action, although simple to produce, has obvious disadvantages, that is, the upper limit of production efficiency is low, and it is difficult to improve production efficiency based on its own structure. Its own limitations are very obvious, especially in the stamping of special-shaped stamping parts. Summary of the invention

[0004] Technical issues solved In view of the deficiencies in the prior art, the present invention provides a punching device for special-shaped stamping parts, which solves the problems raised in the above-mentioned background technology.

[0005] Technical Solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a stamping device for special-shaped stamping parts, comprising an upper stamping die and a lower stamping die, wherein a stamping space is formed between the bottom of the upper stamping die and the top of the lower stamping die, and the bottom of the upper stamping die is extended along the lateral direction of its structure and is sequentially provided with a pre-punching module, an air intake valve forming punch, a fine-punching module, a chamfering giving way structure, an outer shape half-cutting punch, and an outer shape punching punch; The top of the lower punching die extends along the lateral direction of its own structure and is sequentially provided with a first forming hole group that provides punching clearance for the pre-punching module, an exhaust valve forming punch that is in a staggered position with the intake valve forming punch, a second forming hole group that provides punching clearance for the fine punching module, a chamfering module aligned with the chamfering clearance structure, a material stripping module aligned with the outer shape half-cutting punch, and a punching clearance space aligned with the outer shape punching punch.

[0006] Preferably, the upper stamping die is formed by stacking and fixing an upper cover plate, an upper die base, an upper die pad, an upper die plate, a discharge pad and a discharge plate in sequence from top to bottom, and the lower stamping die is formed by stacking and fixing a lower support plate, a lower foot, a lower die base, a lower die pad and a concave die plate in sequence from bottom to top, and the upper stamping die is aligned with the lower stamping die.

[0007] Preferably, the pre-punching module comprises a pre-punching process hole punch, a pre-punching exhaust hole punch, and a pre-punching suction hole punch nested in the bottom of the upper punching die, the first forming hole group consists of three first forming holes, and the three first forming holes are respectively aligned with the pre-punching process hole punch, the pre-punching exhaust hole punch, and the pre-punching suction hole punch; The fine-blanking module includes an exhaust hole fine-blanking punch, an air intake hole fine-blanking punch, and a positioning hole fine-blanking punch nested in the bottom of the upper stamping die. The second forming hole group is composed of three second forming holes, and the three second forming holes are respectively aligned with the exhaust hole fine-blanking punch, the air intake hole fine-blanking punch, and the positioning hole fine-blanking punch.

[0008] Preferably, the chamfering and yielding structure comprises an exhaust valve port chamfering and yielding hole, an air intake port chamfering and a positioning hole chamfering and yielding hole, the chamfering module comprises a chamfering punch stripping block and a chamfering punch fixing block, the chamfering punch fixing block is provided with an exhaust valve port chamfering punch, an air intake valve port chamfering punch and a positioning hole chamfering punch, the exhaust valve port chamfering punch, the air intake valve port chamfering punch and the positioning hole chamfering punch can all penetrate the chamfering punch stripping block and can be respectively aligned with the exhaust valve port chamfering and yielding hole, the air intake port chamfering and the positioning hole chamfering and yielding hole; The lower punching die is provided with a first elastic transmission rod which can be clamped and penetrate through the chamfering punch fixing block and is transmission connected to the chamfering punch stripping block. The lower punching die is provided with a first clearance hole on which the first elastic transmission rod is movably sleeved. The chamfering punch fixing block is provided with a through hole. The first elastic transmission rod includes a first transmission rod and a first buffer spring. The two ends of the first buffer spring are respectively fixed on the surface of one end of the first transmission rod and the inner wall of the bottom of the first clearance hole. The other end of the first transmission rod can penetrate through the through hole in the chamfering punch fixing block and be transmission connected to the bottom of the chamfering punch stripping block.

[0009] Preferably, the material stripping module includes a half-cut die stripping block and a second elastic transmission rod. An inverted T-shaped groove is opened in the lower stamping die, and the T-shaped groove can be respectively assembled with the half-cut die stripping block and the second elastic transmission rod. The second elastic transmission rod includes a second transmission rod and a second buffer spring. The two ends of the second buffer spring are respectively fixed on the surface of one end of the second transmission rod and the inner wall of the bottom of the second inverted T-shaped groove. The other end of the second transmission rod is transmission-connected to the bottom of the half-cut die stripping block.

[0010] Preferably, outer guiding holes are provided at the corners on both sides of the top of the upper stamping die, and inner guiding members are fixed to the corners on both sides of the bottom of the upper stamping die. Inner guiding holes are provided at the corners on both sides of the top of the lower stamping die, and the inner guiding holes can be aligned with the inner guiding members. Outer guiding members are fixed to the corners on both sides of the bottom of the lower stamping die, and the outer guiding members can be aligned with the outer guiding holes. During the mold closing process of the upper stamping die and the lower stamping die, the outer guiding members and the outer guiding holes are engaged with each other, and the inner guiding members and the inner guiding holes are engaged with each other to guide the mold closing movement of the upper stamping die and the lower stamping die.

[0011] Preferably, a plurality of guide pins and a plurality of blanking modules are arranged at equal intervals along the transverse direction of the structure of the bottom of the upper stamping die. A strip is placed between the bottom of the upper stamping die and the top of the lower stamping die. The guide pins can be engaged and positioned with the punching holes formed by stamping the strip with the pre-punching process hole punch. A second relief hole sleeved with the blanking module is provided in the lower stamping die. The blanking module includes a blanking pin and a blanking pin spring. The blanking pin is engaged in the second relief hole. Two ends of the blanking pin spring are respectively fixed to one end face of the blanking pin and the inner wall of the bottom of the second relief hole. The blanking pin can elastically support the strip under the support of the blanking pin spring.

[0012] Preferably, a blanking module is arranged between the pre-punching module and the suction valve forming punch in the upper stamping die, and a third relief hole is provided in the upper stamping die. The blanking module includes a blanking spring and a blanking screw. Two ends of the blanking spring are respectively fixed to the top end of the blanking screw and the inner wall of the top of the third relief hole.

[0013] Preferably, a pressure inspection device is arranged between the inner guiding hole and the adjacent outer guiding member. A guiding hole communicating with the inner guiding hole is provided in the corner structure of the top of the lower stamping die. The pressure inspection device includes a T-shaped transmission shaft, a support cylinder, a pressure sensor, a return spring and a transition ring. The transition ring is sleeved on the outside of the bottom of the outer guiding member, and the surface of the middle part of the transition ring is fixed to the surface of the middle part of the support cylinder. The T-shaped transmission shaft is engaged with the guiding hole, and two ends of the T-shaped transmission shaft are respectively sleeved inside the support cylinder and inside the inner guiding hole. The pressure sensor and the return spring are both sleeved inside the support cylinder, and two ends of the return spring are respectively fixed to the surface of the end of the T-shaped transmission shaft sleeved inside the support cylinder and the inner wall of the support cylinder.

[0014] Preferably, the transition ring is specifically an elastic C-shaped structure. Mounting holes are provided at both ends of the adjacent ends of the transition ring, and a fastener is arranged between the adjacent ends of the transition ring. The fastener includes a bolt and a nut. One end of the bolt penetrates through the mounting holes at both ends of the transition ring and is screwed with the nut to stably mount the transition ring on the surface of the bottom of the pre-punching suction hole punch.

[0015] Beneficial effects The present invention provides a stamping device for special-shaped stampings, which has the following beneficial effects: 1. This stamping device for special-shaped stampings forms a multi-functional stamping device through the pre-punching module, suction valve forming punch, fine blanking module, chamfering relief structure, outer shape semi-cut punch, outer shape punching punch arranged on the upper stamping die, the first forming hole group, exhaust valve forming punch, second forming hole group, chamfering module, blanking module, and punching relief space arranged on the lower stamping die. Subsequently, during the stamping process of the strip, multiple structural features can be realized in a progressive stamping manner on the strip to achieve mass production of the strip, fully improving production efficiency.

[0016] 2. This stamping device for special-shaped stampings performs double guiding and limiting on the mold closing of the upper stamping die and the lower stamping die through the clamping combination between the inner guiding member and the inner guiding hole, and between the outer guiding hole and the outer guiding member, ensuring the processing accuracy of the continuous mold closing process of the upper stamping die and the lower stamping die.

[0017] 3. This stamping device for special-shaped stampings is linked with the pressure inspection device, the inner guiding member, and the inner guiding hole, and then the wear condition of the continuously clamped and guided inner guiding member is detected in real time, providing a technical means for the user to understand the friction degree of the inner guiding member in real time, further improving the user's control degree of the overall device, and optimizing the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional view of the structure of the present invention; Figure 2 It is a schematic top view of the lower stamping die of the structure of the present invention; Figure 3 It is an enlarged schematic view of the pre-punching module of the structure of the present invention; Figure 4 It is an enlarged schematic view of the suction valve forming punch of the structure of the present invention; Figure 5 It is an enlarged schematic view of the fine blanking module of the structure of the present invention; Figure 6 It is an enlarged schematic view of the chamfering module of the structure of the present invention; Figure 7 It is an enlarged schematic view of the ejector module of the structure of the present invention; Figure 8 It is a schematic cross-sectional view of the support cylinder of the structure of the present invention; Figure 9 It is a three-dimensional schematic view of the T-shaped transmission shaft of the structure of the present invention; Figure 10 It is a three-dimensional schematic view of the transition ring of the structure of the present invention.

[0019] In the figure: 1. Upper stamping die; 101. Upper cover plate; 102. Upper die base; 103. Upper die backing plate; 104. Upper template; 105. Stripping backing plate; 106. Stripping plate; 2. Lower stamping die; 201. Lower carrier plate; 202. Lower pad foot; 203. Lower die base; 204. Lower die backing plate; 205. Concave template; 3. Strip; 4. Pre-punching process hole punch; 5. Pre-punching exhaust hole punch; 6. Pre-punching suction hole punch; 7. Suction valve forming punch; 8. Exhaust valve forming punch; 9. Exhaust hole fine blanking punch; 10. Suction hole fine blanking punch; 11. Positioning hole fine blanking punch; 12. Chamfering punch stripping block; 13. Chamfering punch fixing block; 14. First elastic transmission rod; 15. Exhaust valve port chamfering punch; 16. Suction valve port chamfering punch; 17. Positioning hole chamfering punch; 18. Outer shape semi-cutting punch; 19. Outer shape punching punch; 20. Outer shape semi-cutting die stripping block; 21. Second elastic transmission rod; 22. Guide pin; 23. Inner guide; 24. Inner guide hole; 25. Outer guide hole; 26. Outer guide; 27. Stripping pin; 28. Stripping pin spring; 29. Stripping spring; 30. Stripping screw; 31. T-shaped transmission shaft; 32. Support cylinder; 33. Pressure sensor; 34. Return spring; 35. Transition ring. Detailed implementation manner

[0020] Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1 - 6 , a special-shaped stamping part stamping device, including an upper stamping die 1 and a lower stamping die 2. A stamping space is formed between the bottom of the upper stamping die 1 and the top of the lower stamping die 2. And along the transverse direction of its own structure, the bottom of the upper stamping die 1 is sequentially provided with a pre-punching module, a suction valve forming punch 7, a fine blanking module, a chamfering and yielding structure, an outer shape semi-cutting punch 18, and an outer shape punching punch 19. Along the transverse direction of its own structure, the top of the lower stamping die 2 is sequentially provided with a first forming hole group for providing stamping yielding for the pre-punching module, an exhaust valve forming punch 8 in an interleaved position with the suction valve forming punch 7, a second forming hole group for providing stamping yielding for the fine blanking module, a chamfering module aligned with the chamfering and yielding structure, a stripping module aligned with the outer shape semi-cutting punch 18, and a punching yielding space aligned with the outer shape punching punch 19; The upper punching die 1 is formed by stacking and fixing the upper cover plate 101, the upper die seat 102, the upper die pad 103, the upper die plate 104, the unloading pad 105 and the unloading plate 106 from top to bottom in sequence, so that the structural strength is guaranteed to meet the use requirements of subsequent continuous punching. The lower punching die 2 is formed by stacking and fixing the lower support plate 201, the lower pad 202, the lower die seat 203, the lower die pad 204 and the concave die plate 205 in sequence from bottom to top in sequence, so that the structural strength is guaranteed to meet the use requirements of subsequent continuous punching, and the upper punching die 1 is aligned with the lower punching die 2 to ensure the precise effect of subsequent die clamping and punching; The pre-punching module includes a pre-punching process hole punch 4, a pre-punching exhaust hole punch 5, and a pre-punching suction hole punch 6 nested in the bottom of the upper punching die 1. The first forming hole group consists of three first forming holes, and the three first forming holes are respectively aligned with the pre-punching process hole punch 4, the pre-punching exhaust hole punch 5, and the pre-punching suction hole punch 6. The fine-punching module includes an exhaust hole fine-punching punch 9, an suction hole fine-punching punch 10, and a positioning hole fine-punching punch 11 nested in the bottom of the upper punching die 1. The second forming hole group consists of three second forming holes, and the three second forming holes are respectively aligned with the exhaust hole fine-punching punch 9, the suction hole fine-punching punch 10, and the positioning hole fine-punching punch 11; The chamfering and giving way structure includes an exhaust valve chamfering and giving way hole, an air intake hole chamfering and a positioning hole chamfering and giving way hole, and the chamfering module includes a chamfering punch stripping block 12 and a chamfering punch fixing block 13. The chamfering punch fixing block 13 is internally mounted with an exhaust valve chamfering punch 15, an air intake valve chamfering punch 16 and a positioning hole chamfering punch 17. The exhaust valve chamfering punch 15, the air intake valve chamfering punch 16 and the positioning hole chamfering punch 17 can all penetrate the chamfering punch stripping block 12 and can be aligned with the exhaust valve chamfering and giving way hole, the air intake hole chamfering and the positioning hole chamfering and giving way hole, respectively, thereby providing automatic chamfering processing conditions for the holes processed in the previous process; A first elastic transmission rod 14 capable of being clamped and penetrated through the chamfering punch fixing block 13 and being transmission-connected to the chamfering punch stripping block 12 is arranged in the lower punching die 2, a first clearance hole for movably sleeved by the first elastic transmission rod 14 is provided in the lower punching die 2, a through hole is provided in the chamfering punch fixing block 13, the first elastic transmission rod 14 comprises a first transmission rod and a first buffer spring, the two ends of the first buffer spring are respectively fixed on the surface of one end of the first transmission rod and the inner wall of the bottom of the first clearance hole, the other end of the first transmission rod can penetrate the through hole in the chamfering punch fixing block 13 and be transmission-connected to the bottom of the chamfering punch stripping block 12; The strip discharging module includes a strip discharging block 20 for semi - cutting the outer shape of the die and a second elastic transmission rod 21. An inverted T - shaped groove is formed in the lower stamping die 2, and the T - shaped groove can be sleeved with the strip discharging block 20 for semi - cutting the outer shape of the die and the second elastic transmission rod 21 respectively. The second elastic transmission rod 21 includes a second transmission rod and a second buffer spring. Two ends of the second buffer spring are respectively fixed on the surface of one end of the second transmission rod and the inner wall of the bottom of the second inverted T - shaped groove. The other end of the second transmission rod is in transmission connection with the bottom of the strip discharging block 20 for semi - cutting the outer shape of the die. The second elastic transmission rod 21 cooperates with the outer - shape semi - cutting punch 18 and the outer - shape punching punch 19 to perform staged stamping and shearing on the semi - finished workpiece after the hole structure is processed, reducing the load of single stamping and shearing.

[0022] During use, one end of the strip 3 is guided into the stamping area formed between the bottom of the upper stamping die 1 and the top of the lower stamping die 2 by using the existing output device. Specifically, it is first aligned with the pre - punching module. Then, the upper stamping die 1 and the related structures on the upper stamping die 1 are moved downward by using the existing transmission device to perform die - closing stamping with the lower stamping die 2. Then, the pre - punching module cooperates with its corresponding first forming hole group to perform pre - punching on the structure of the strip 3 in the stamping area, thereby forming air - suction holes, air - exhaust holes and positioning punching holes. After the pre - punching module completes one - cycle operation, the transmission device makes the upper stamping die 1 and the related structures on the upper stamping die 1 move downward and automatically separate from the lower stamping die 2. The output device further outputs the strip 3, making the pre - punched area located in the working areas of the air - suction valve forming punch 7 and the air - exhaust valve forming punch 8. Similarly, the upper stamping die 1 and the related structures on the upper stamping die 1 are moved downward by using the existing transmission device to perform die - closing stamping with the lower stamping die 2, and further form the air - exhaust valve and the air - suction valve on the strip 3. At the same time, the structure at the rear end of the strip 3 is synchronously stamped by the pre - punching module, achieving a progressive stamping effect. Subsequently, the transmission device makes the upper stamping die 1 and the related structures on the upper stamping die 1 move downward and automatically separate from the lower stamping die 2. The output device further outputs the strip 3. The air - exhaust valve and air - suction valve areas of the strip 3 are in the working area of the fine - punching module. The existing transmission device makes the upper stamping die 1 and the related structures on the upper stamping die 1 move downward to perform die - closing stamping with the lower stamping die 2. Then, the air - exhaust hole fine - punching punch 9, the air - suction hole fine - punching punch 10 and the positioning hole fine - punching punch 11 are used to perform secondary fine - punching on the air - exhaust holes and air - suction holes on the strip 3 and punch out the positioning holes. At the same time, the structure at the rear end of the strip 3 is synchronously stamped by the air - suction valve forming punch 7 and the air - exhaust valve forming punch 8 and the pre - punching module. Next, the transmission device moves the upper stamping die 1 and the related structures on the upper stamping die 1 downward to automatically separate from the lower stamping die 2. The output device further outputs the strip 3, aligning the front end of the strip 3 with the chamfering module with the processed structure. Similarly, the existing transmission device moves the upper stamping die 1 and the related structures on the upper stamping die 1 downward to close the die and perform stamping with the lower stamping die 2. Then, the chamfering module is used to chamfer the exhaust valve port, suction valve port, and positioning hole formed at the front end of the strip 3. At the same time, the structures at the rear end of the strip 3 are successively subjected to the stamping operations of the previous pre-stamping module to achieve the progressive stamping processing effect. After completion, the transmission device moves the upper stamping die 1 and the related structures on the upper stamping die 1 downward to automatically separate from the lower stamping die 2. The output device further outputs the strip 3, aligning the structure with holes, valves, etc. processed at the front end of the strip 3 with the external shape semi-cutting punch 18 and the external shape semi-cutting die stripper block 20. The existing transmission device moves the upper stamping die 1 and the related structures on the upper stamping die 1 downward to close the die and perform stamping. The external shape semi-cutting punch 18 cooperates with the external shape semi-cutting die stripper block 20 and the second elastic transmission rod 21 to perform preliminary stamping and shearing on the structure with holes, valves, etc. processed at the front end of the strip 3. At the same time, the structures at the rear end of the strip 3 are successively subjected to the stamping operations of the previous pre-stamping module to achieve the progressive stamping processing effect. Finally, the transmission device moves the upper stamping die 1 and the related structures on the upper stamping die 1 downward to automatically separate from the lower stamping die 2. The output device further outputs the strip 3, aligning the structure that has been sheared once at the front end of the strip 3 with the external shape punching die 19. Similarly, the existing transmission device moves the upper stamping die 1 and the related structures on the upper stamping die 1 downward to close the die and perform stamping. Then, the external shape punching die 19 is used to completely punch the structure that has been sheared once at the front end of the strip 3, and the punching relief space provides relief. Subsequently, according to the above steps, the stamping strip 3 is gradually transferred in sequence, and the workpieces will also be continuously processed, achieving the production effect of an automatic assembly line and fully improving the production efficiency.

[0023] Please refer to Figure 1 , external guide holes 25 are provided at the corners on both sides of the top of the upper stamping die 1, and internal guide members 23 are fixed to the corners on both sides of the bottom of the upper stamping die 1. Internal guide holes 24 are provided at the corners on both sides of the top of the lower stamping die 2, and the internal guide holes 24 can be aligned with the internal guide members 23. External guide members 26 are fixed to the corners on both sides of the bottom of the lower stamping die 2, and the external guide members 26 can be aligned with the external guide holes 25. During the die closing process of the upper stamping die 1 and the lower stamping die 2, the external guide members 26 and the external guide holes 25 are engaged with each other, and the internal guide members 23 and the internal guide holes 24 are engaged with each other to guide the die closing movement of the upper stamping die 1 and the lower stamping die 2.

[0024] When in use, taking into account the mold closing accuracy during the continuous stamping process of the upper stamping die 1 and the lower stamping die 2, an outer guide member 26 and an outer guide hole 25 are mutually engaged, and an inner guide member 23 and an inner guide hole 24 are mutually engaged to guide the upper stamping die 1 and the lower stamping die 2 to move in the mold closing manner, so as to maintain the continuous mold closing operation accuracy of the upper stamping die 1 and the lower stamping die 2.

[0025] See also Figure 1 , Figure 7 The bottom of the upper stamping die 1 is equidistantly arranged with a plurality of guide pins 22 and a plurality of ejection modules along the lateral direction of its structure. A material strip 3 is placed between the bottom of the upper stamping die 1 and the top of the lower stamping die 2. The guide pins 22 can be engaged with the punch 4 of the pre-punching process hole to position the punching formed by punching on the material strip 3. A second clearance hole that is fitted with the ejection module is opened in the lower stamping die 2. The ejection module includes an ejection pin 27 and an ejection pin spring 28. The ejection pin 27 is engaged in the second clearance hole. The ejection pin spring 28 The two ends are respectively fixed on the end face of one end of the ejection pin 27 and the bottom inner wall of the second clearance hole. The ejection pin 27 can elastically support the material strip 3 under the support of the ejection pin spring 28. A discharge module is provided in the upper stamping die 1 between the pre-punching module and the suction valve forming punch 7, and a third clearance hole is opened in the upper stamping die 1. The discharge module includes a discharge spring 29 and a discharge screw 30. The two ends of the discharge spring 29 are respectively fixed on the top end of the discharge screw 30 and the inner wall of the top of the third clearance hole.

[0026] When in use, considering the need for the material strip 3 to fully return to the middle of the stamping space between the lower stamping die 2 and the upper stamping die 1 after the stamping process, the multiple ejector pins 27 and the corresponding ejector pin springs 28 are used to shrink into the lower stamping die 2 to make way when the upper stamping die 1 and the lower stamping die 2 are closed. After the stamping is completed, the ejector pin 27 will use its corresponding ejector pin spring 28 to press the material strip 3 to move the material strip 3 to its initial position. Similarly, the operating effect of the unloading spring 29 and the unloading screw 30 is the same as that of the above-mentioned ejector pin 27 and ejector pin spring 28. They all make way during the closing and stamping process. After the stamping is completed, they press the material strip 3 to move the material strip 3 to its initial position.

[0027] See also Figures 8 - 10, a pressure detection device is arranged between the inner guiding hole 24 and the adjacent outer guiding member 26. A guiding hole communicating with the inner guiding hole 24 is provided at the corner structure of the top of the lower stamping die 2. The pressure detection device includes a T-shaped transmission shaft 31, a support cylinder 32, a pressure sensor 33, a return spring 34 and a transition ring 35. The transition ring 35 is sleeved on the outer side of the bottom of the outer guiding member 26, and the surface of the middle part of the transition ring 35 is fixed to the surface of the middle part of the support cylinder 32. The T-shaped transmission shaft 31 is clamped with the guiding hole, and both ends of the T-shaped transmission shaft 31 are respectively sleeved inside the support cylinder 32 and inside the inner guiding hole 24. The pressure sensor 33 and the return spring 34 are both sleeved inside the support cylinder 32, and both ends of the return spring 34 are respectively fixed on the surface of the end of the T-shaped transmission shaft 31 sleeved inside the support cylinder 32 and the inner wall of the support cylinder 32. The transition ring 35 specifically adopts an elastic C-shaped structure. Installation holes are provided at both ends of the adjacent ends of the transition ring 35, and fasteners are arranged between the adjacent ends of the transition ring 35. The fasteners include bolts and nuts. One end of the bolt penetrates through the installation holes at both ends of the transition ring 35 and is screwed with the nut, so that the transition ring 35 is stably installed on the surface of the bottom of the pre-punching suction hole punch 6, thereby providing favorable conditions for the replacement and maintenance of the pressure detection device.

[0028] During use, considering the problem that the inner guiding member 23, which plays a major guiding role and maintains the die closing accuracy, will cause the die closing accuracy of the upper stamping die 1 and the lower stamping die 2 to decrease due to frictional wear during the compound die process of the upper stamping die 1 and the lower stamping die 2, the pressure detection device is used to detect the wear condition of the inner guiding member 23 in real time. The specific operation is as follows: During the process of clamping the upper stamping die 1 and the lower stamping die 2 for die closing guidance by clamping the inner guiding member 23 with the inner guiding hole 24, the inner guiding member 23 will synchronously extrude the T-shaped transmission shaft 31, and then the T-shaped transmission shaft 31 will synchronously extrude the pressure sensor 33 under the traction of the support cylinder 32 and the constraint of the guiding hole, and then the pressure sensor 33 will synchronously output pressure data. Compared with the standard value, if it is within a reasonable numerical range, it indicates that the structural state of the inner guiding member 23 is good, and the die closing accuracy of the upper stamping die 1 and the lower stamping die 2 meets the use requirements. On the contrary, if it is not within a reasonable numerical range, it indicates that the structural state of the inner guiding member 23 is severely worn, and the upper stamping die 1 and the lower stamping die 2 need to be repaired and adjusted in time.

[0029] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0030] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stamping device for special-shaped stamped parts, comprising an upper stamping die (1) and a lower stamping die (2), characterized in that: A stamping space is formed between the bottom of the upper stamping die (1) and the top of the lower stamping die (2). Along the transverse direction of its own structure, a pre-punching module, a suction valve forming punch (7), a fine blanking module, a chamfer relief structure, a semi-profile cutting punch (18), and a profile cutting punch (19) are sequentially arranged at the bottom of the upper stamping die (1). Along the transverse direction of its own structure, a first forming hole group for providing stamping relief for the pre-punching module, an exhaust valve forming punch (8) in an interleaved position with the suction valve forming punch (7), a second forming hole group for providing stamping relief for the fine blanking module, a chamfer module aligned with the chamfer relief structure, a stripping module aligned with the semi-profile cutting punch (18), and a cutting relief space aligned with the profile cutting punch (19) are sequentially arranged at the top of the lower stamping die (2).

2. The stamping device for a special-shaped stamping part according to claim 1, wherein: The upper stamping die (1) is formed by sequentially stacking and fixing an upper cover plate (101), an upper die base (102), an upper die backing plate (103), an upper template (104), a stripping backing plate (105), and a stripping plate (106) from top to bottom. The lower stamping die (2) is formed by sequentially stacking and fixing a lower carrier plate (201), lower feet (202), a lower die base (203), a lower die backing plate (204), and a concave template (205) from bottom to top, and the upper stamping die (1) is aligned with the lower stamping die (2).

3. The stamping device for a special-shaped stamping part according to claim 1, characterized in that: The pre-punching module includes a pre-punching process hole punch (4), a pre-punching exhaust hole punch (5), and a pre-punching suction hole punch (6) nested inside the bottom of the upper stamping die (1). The first forming hole group is composed of three first forming holes, and the three first forming holes are respectively aligned with the pre-punching process hole punch (4), the pre-punching exhaust hole punch (5), and the pre-punching suction hole punch (6). The fine blanking module includes an exhaust hole fine blanking punch (9), a suction hole fine blanking punch (10), and a positioning hole fine blanking punch (11) nested inside the bottom of the upper stamping die (1). The second forming hole group is composed of three second forming holes, and the three second forming holes are respectively aligned with the exhaust hole fine blanking punch (9), the suction hole fine blanking punch (10), and the positioning hole fine blanking punch (11).

4. The stamping device for special-shaped stampings according to claim 1, characterized in that: The chamfer relief structure includes an exhaust valve port chamfer relief hole, a suction hole chamfer, and a positioning hole chamfer relief hole. The chamfer module includes a chamfer punch stripping block (12) and a chamfer punch fixing block (13). An exhaust valve port chamfer punch (15), a suction valve port chamfer punch (16), and a positioning hole chamfer punch (17) are sleeved inside the chamfer punch fixing block (13). The exhaust valve port chamfer punch (15), the suction valve port chamfer punch (16), and the positioning hole chamfer punch (17) can all penetrate through the chamfer punch stripping block (12) and can be respectively aligned with the exhaust valve port chamfer relief hole, the suction hole chamfer, and the positioning hole chamfer relief hole. A first elastic transmission rod member (14) capable of clamping through the chamfer punch fixing block (13) and being in transmission connection with the chamfer punch stripper block (12) is arranged in the lower stamping die (2). A first relief hole in which the first elastic transmission rod member (14) is movably sleeved is formed in the lower stamping die (2). A through hole is formed in the chamfer punch fixing block (13). The first elastic transmission rod member (14) includes a first transmission rod and a first buffer spring. Two ends of the first buffer spring are respectively fixed on the surface of one end of the first transmission rod and the inner wall of the bottom of the first relief hole. The other end of the first transmission rod can penetrate through the through hole in the chamfer punch fixing block (13) and be in transmission connection with the bottom of the chamfer punch stripper block (12).

5. The stamping device for a special-shaped stamping part according to claim 1, characterized in that: The stripper module includes a profile half-cut female die stripper block (20) and a second elastic transmission rod member (21). An inverted T-shaped groove is formed in the lower stamping die (2), and the T-shaped groove can be sleeved with the profile half-cut female die stripper block (20) and the second elastic transmission rod member (21) respectively. The second elastic transmission rod member (21) includes a second transmission rod and a second buffer spring. Two ends of the second buffer spring are respectively fixed on the surface of one end of the second transmission rod and the inner wall of the bottom of the second inverted T-shaped groove. The other end of the second transmission rod is in transmission connection with the bottom of the profile half-cut female die stripper block (20).

6. The stamping device for a special-shaped stamping part according to claim 1, characterized in that: Outer guiding holes (25) are formed in the corner structures on both sides of the top of the upper stamping die (1), and inner guiding members (23) are fixed to the corner structures on both sides of the bottom of the upper stamping die (1). Inner guiding holes (24) are formed in the corner structures on both sides of the top of the lower stamping die (2), and the inner guiding holes (24) can be aligned with the inner guiding members (23). Outer guiding members (26) are fixed to the corner structures on both sides of the bottom of the lower stamping die (2), and the outer guiding members (26) can be aligned with the outer guiding holes (25). During the process of closing the upper stamping die (1) and the lower stamping die (2), the outer guiding members (26) and the outer guiding holes (25) are mutually clamped, and the inner guiding members (23) and the inner guiding holes (24) are mutually clamped to guide the closing movement of the upper stamping die (1) and the lower stamping die (2).

7. An abnormal-shaped stamping part stamping device according to claim 3, characterized in that: A plurality of guide pins (22) and a plurality of blank holding modules are arranged at equal intervals along the transverse direction of the structure at the bottom of the upper stamping die (1). A strip (3) is placed between the bottom of the upper stamping die (1) and the top of the lower stamping die (2). The guide pins (22) can be clamped and positioned with the punching holes formed by stamping the strip (3) by the pre-punching process hole punch (4). A second relief hole in which the blank holding module is sleeved is formed in the lower stamping die (2). The blank holding module includes a blank holding pin (27) and a blank holding pin spring (28). The blank holding pin (27) is clamped in the second relief hole. Two ends of the blank holding pin spring (28) are respectively fixed on the end face of one end of the blank holding pin (27) and the inner wall of the bottom of the second relief hole. The blank holding pin (27) can elastically support the strip (3) under the support of the blank holding pin spring (28).

8. The stamping device for a special-shaped stamping part according to claim 1, characterized in that: A stripping module is arranged inside the upper stamping die (1) between the pre-punching module and the suction valve forming punch (7), and a third relief hole is formed in the upper stamping die (1). The stripping module includes a stripping spring (29) and a stripping screw (30). Two ends of the stripping spring (29) are respectively fixed on the top end of the stripping screw (30) and the inner wall of the top of the third relief hole.

9. An irregular stamping part stamping device according to claim 6, characterized in that: A pressure inspection device is arranged between the inner guiding hole (24) and the adjacent outer guiding member (26). A guiding hole communicating with the inner guiding hole (24) is formed in the corner structure at the top of the lower stamping die (2). The pressure inspection device includes a T-shaped transmission shaft (31), a support cylinder (32), a pressure sensor (33), a return spring (34) and a transition ring (35). The transition ring (35) is sleeved on the outer side of the bottom of the outer guiding member (26), and the surface in the middle of the transition ring (35) is fixed to the surface in the middle of the support cylinder (32). The T-shaped transmission shaft (31) is clamped with the guiding hole, and two ends of the T-shaped transmission shaft (31) are respectively sleeved inside the support cylinder (32) and inside the inner guiding hole (24). The pressure sensor (33) and the return spring (34) are both sleeved inside the support cylinder (32), and two ends of the return spring (34) are respectively fixed on the surface of the end of the T-shaped transmission shaft (31) sleeved inside the support cylinder (32) and the inner wall of the support cylinder (32).

10. An irregular stamping part stamping device according to claim 9, characterized in that: The transition ring (35) specifically adopts an elastic C-shaped structure. Mounting holes are formed at both end heads adjacent to each other of the transition ring (35), and a fastener is arranged between the two ends adjacent to each other of the transition ring (35). The fastener includes a bolt and a nut. One end of the bolt penetrates through the mounting holes at both end heads of the transition ring (35) and is screwed with the nut, so that the transition ring (35) is stably mounted on the surface of the bottom of the pre-punching suction hole punch (6).

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