A stamping die

Abstract

The present invention belongs to the field of stamping technology, and in particular, relates to a stamping die, which includes a top die, a bottom die, and a base, wherein the top die is installed on a press machine, and the bottom die is installed on the upper side of the base; the stamping die designed by the present invention can easily remove the stamped parts without flipping the bottom die after the stamping is completed and the top die moves up; compared with the traditional stamping die with a flipping mechanism and a pushing structure, the stamping die designed by the present invention greatly reduces the cost of the die. In the present invention, after the five bottom die assemblies are closed, the line connecting the rotating axis of the fan-shaped bottom plate installed in each bottom die assembly and the corresponding connecting rod and the hinge of the fan-shaped bottom plate is perpendicular to the corresponding top rod. Such a design can ensure that when the five bottom die assemblies are closed, the top rod has a good locking effect on the bottom die assembly, preventing the side arc plate from being pushed outward by the lateral external force during the stamping process.

Description

Technical Field

[0001] The invention belongs to the technical field of stamping, and in particular relates to a stamping die. 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). Stamping is a pressure processing method that uses a die installed on a press to apply pressure to the material at room temperature to separate or plastically deform it, thereby obtaining the desired parts.

[0003] For cylindrical stamping parts, traditional stamping dies need to flip the bottom die upward after the stamping parts are stamped and formed, so that the open end of the stamping parts faces downward. The stamping parts rely on their own gravity to fall off the bottom die, but because there is a certain friction resistance between the stamping parts and the bottom die, the stamping parts are not easy to fall off.

[0004] In addition, for the stamping dies of cylindrical stamping parts, some stamping dies are equipped with a top piece on the lower side of the bottom die. After the stamping part is flipped over, the stamping part is pushed off the bottom die through the top piece.

[0005] Both of the above demoulding operations require the bottom mold to be flipped 180 degrees, and a flipping mechanism is provided on the stamping mold.

[0006] The present invention designs a stamping die which can easily remove the stamping part from the bottom die without turning over the bottom die to solve the above problem. Summary of the invention

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A stamping die comprises a top die, a bottom die and a base, and is characterized in that the top die is installed on a press machine, and the bottom die is installed on the upper side of the base.

[0009] The mounting shell is fixedly mounted on the upper side of the base, the transmission ring is rotatably mounted on the mounting shell, and five rotating shafts are evenly and fixedly mounted circumferentially on the inner bottom surface of the mounting shell; the bottom mold is composed of five circumferentially distributed bottom mold assemblies, each of which includes a fan-shaped bottom plate, a side arc plate and an L-shaped limit plate, the side arc plate is fixedly mounted on the upper side of the fan-shaped bottom plate, and the L-shaped limit plate is fixedly mounted on the lower side of the fan-shaped bottom plate; each bottom mold assembly has one corner of the fan-shaped bottom plate hingedly mounted on the rotating shaft installed in the mounting shell, and the other corner of the fan-shaped bottom plate is hingedly mounted with a connecting rod, and the other end of the connecting rod is hingedly mounted on the inner wall surface of the transmission ring.

[0010] The corners of the fan-shaped bottom plate that are not connected to the rotating shaft and the connecting rod are provided with arc-shaped notches. After the five bottom mold components are closed, the arc-shaped notches on the five fan-shaped bottom plates are combined into a complete circle.

[0011] The mounting shell is provided with a first motor for controlling whether the transmission ring rotates or not.

[0012] A guide sleeve is fixedly installed on the upper side of the base, and the slide rod is installed on the upper side of the guide sleeve through the sliding cooperation of the guide block and the guide groove. An electric push rod is installed in the guide sleeve, and the upper end of the electric push rod is connected with the lower end of the slide rod; a screw rod is installed on the upper end of the slide rod, and the rotating threaded sleeve is installed on the screw rod through thread cooperation, and the transfer bottom column is rotatably installed on the outer side of the rotating threaded sleeve, and a limiting ring is fixedly installed on the outer side of the transfer bottom column; a piston is installed on the upper end of the screw rod, and the piston is located on the inner side of the transfer bottom column; five rocker arms are swingably installed on the upper end surface of the rotating threaded sleeve, and the five rocker arms are evenly distributed circumferentially on the upper end surface of the rotating threaded sleeve, and a limiting rod is hinged on each rocker arm, and the end of the limiting rod away from the rocker arm passes through the outer side of the transfer bottom column; the five limiting rods correspond one by one to the five L-shaped limiting plates in the five bottom mold assemblies.

[0013] As a preferred solution, the mounting shell is fixedly mounted on the upper side of the base through four first supports, and the lower end surface of the mounting shell is provided with five circumferentially evenly distributed square notches.

[0014] As a preferred scheme, five circumferentially evenly distributed guide grooves are opened on the upper end surface of the mounting shell, the rotating ring is rotatably installed in the mounting shell, and a spiral spring is installed between the rotating ring and the transmission ring; five oblique grooves evenly distributed circumferentially are opened on the upper end surface of the rotating ring, the push rod is an L-shaped structure, an arc-shaped pressure plate is fixedly installed on one end of the push rod, and sliding columns symmetrically distributed up and down are installed on the push rod, and the five push rods are circumferentially evenly slidably installed on the mounting shell, the sliding column at the upper end of the push rod corresponds one by one to the guide grooves opened on the mounting shell and slides respectively, and the sliding column at the lower end of the push rod corresponds one by one to the five oblique grooves opened on the rotating ring and slides respectively; a telescopic rod is installed between the push rod and the mounting shell, a spring is nested on the outside of the telescopic rod, one end of the spring is fixedly installed on the mounting shell, and the other end of the spring is fixedly installed on the push rod.

[0015] As a preferred solution, the transmission ring is rotatably mounted on the mounting shell, and the outer wall surface of the upper end of the transmission ring has teeth; a gear is rotatably mounted on the upper end of the mounting shell, and the gear meshes with the teeth on the upper end of the transmission ring; the first motor is fixedly mounted on the upper side of the mounting shell, and the output shaft of the first motor is fixedly connected to the rotating shaft of the gear.

[0016] As a preferred solution, two guide grooves are symmetrically opened on the inner side of the guide sleeve, two guide blocks are symmetrically fixedly installed on the lower end of the slide rod, and the slide rod is installed on the upper side of the guide sleeve through the sliding cooperation between the two guide blocks and the two guide grooves.

[0017] As a preferred solution, a guide ring is installed on the outer circumferential surface of the rotating threaded sleeve, and the transfer base column is rotatably installed on the outer side of the rotating threaded sleeve through the guide ring.

[0018] As a preferred solution, a plunger is installed at the upper end of the transfer bottom column, and the plunger has evenly distributed air holes; a rubber pad is installed at the upper end of the transfer bottom column.

[0019] As a preferred solution, five avoidance grooves for avoiding the ejector rod are provided on the transmission ring.

[0020] The transmission mechanism used for the above-mentioned stamping die includes a second support, a second motor, a transmission roller, and a transmission belt, wherein four transmission rollers are rotatably mounted on the upper side of the base through four second supports, two sections of the transmission belt are symmetrically mounted on the four transmission rollers, and an escape zone is provided between the two sections of the transmission belt for the transfer bottom column to pass through; the second motor is fixedly mounted on one of the second supports and the output shaft of the second motor is fixedly connected to the rotating shaft of one of the transmission rollers.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] 1. The stamping die designed in the present invention can easily remove the stamped parts without flipping the bottom die after the stamping is completed and the top die is moved up; compared with the traditional stamping die with added flipping mechanism and pushing structure, the stamping die designed in the present invention greatly reduces the cost of the die.

[0023] 2. In the present invention, after the five bottom mold assemblies are closed, the line connecting the rotating axis of the fan-shaped bottom plate installed in each bottom mold assembly and the corresponding connecting rod and the hinge of the fan-shaped bottom plate is perpendicular to the corresponding top rod. Such a design can ensure that when the five bottom mold assemblies are closed, the top rod has a good locking effect on the bottom mold assembly, preventing the side arc plate from being pushed outward by lateral external force during the stamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall appearance of the components.

[0025] Figure 2 It is a schematic diagram of the overall component distribution.

[0026] Figure 3 It is a schematic diagram of the transmission mechanism structure.

[0027] Figure 4 This is a schematic diagram of the slide bar installation.

[0028] Figure 5 This is a schematic diagram of the bottom mold installation.

[0029] Figure 6 This is a schematic diagram of the limit rod installation.

[0030] Figure 7It is a schematic diagram of the transmission ring drive.

[0031] Figure 8 This is a schematic diagram of the side mold drive.

[0032] Fig. 9 It is a schematic diagram of the side mold structure.

[0033] Fig.10 It is a schematic diagram of the top rod distribution.

[0034] Fig.11 This is a schematic diagram of the top rod installation.

[0035] Fig.12 It is a schematic diagram of the cooperation between the sliding column and the oblique sliding groove.

[0036] Names of the reference numerals in the figure: 1. top mold; 2. first motor; 3. mounting shell; 4. bottom mold; 5. first support; 6. base; 7. transmission mechanism; 8. second support; 9. second motor; 10. transmission roller; 11. transmission belt; 12. avoidance zone; 13. slide bar; 14. guide block; 15. guide groove; 16. electric push rod; 17. guide sleeve; 18. stamping part; 19. transfer bottom column; 21. rotating threaded sleeve; 22. limiting ring; 23. screw; 24. limiting rod; 25. plunger; 26 , piston; 27, rocker arm; 28, guide ring; 29, push rod; 30, gear; 31, rotating ring; 32, transmission ring; 33, scroll spring; 34, connecting rod; 35, avoidance slide; 36, rotating shaft; 37, side arc plate; 38, fan-shaped bottom plate; 39, arc-shaped notch; 40, L-shaped limit plate; 41, arc-shaped pressure plate; 42, spring; 43, telescopic rod; 44, square notch; 45, guide slide; 46, oblique slide; 47, sliding column; 48, rubber pad; 49, bottom mold assembly. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples or drawings are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0038] A stamping die, such as Figure 1 , 2 , 6, and 8, it includes a top mold 1, a first motor 2, a mounting shell 3, a bottom mold 4, a slide rod 13, an electric push rod 16, a transfer bottom column 19, a rotating threaded sleeve 21, a limit rod 24, a piston 26, a rocker rod 27, a plunger 25, a top rod 29, a rotating ring 31, a transmission ring 32, a volute spring 33, a connecting rod 34, and a spring 42, wherein Figure 1 As shown, the mounting shell 3 is fixedly mounted on the upper side of the base 6 through four first supports 5. Fig.11As shown, the upper end surface of the mounting shell 3 is provided with five circumferentially evenly distributed guide slots 45, and the lower end surface of the mounting shell 3 is provided with five circumferentially evenly distributed square notches 44, and the five square notches 44 correspond to the five guide slots 45 one by one; Figure 7 As shown, the transmission ring 32 is rotatably mounted on the mounting shell 3, and the outer wall surface of the upper end of the transmission ring 32 has teeth; the rotating ring 31 is rotatably mounted in the mounting shell 3, and a volute spring 33 is installed between the rotating ring 31 and the transmission ring 32; Fig.12 As shown, the upper end surface of the rotating ring 31 is evenly and evenly provided with five oblique sliding grooves 46, and the top rod 29 is an L-shaped structure. Fig.10 As shown, an arc-shaped pressing plate 41 is fixedly mounted on one end of the top rod 29. Fig.12 As shown, the top rod 29 is provided with sliding posts 47 symmetrically distributed up and down. Figure 7 , 10 As shown in FIG. 11 , five push rods 29 are uniformly slidably mounted on the mounting shell 3 in the circumferential direction, and the sliding posts 47 at the upper ends of the push rods 29 correspond one-to-one with the guide slots 45 opened on the mounting shell 3 and slide in cooperation with each other, and the sliding posts 47 at the lower ends of the push rods 29 correspond one-to-one with the five oblique slots 46 opened on the rotating ring 31 and slide in cooperation with each other; Fig.11 , 12 As shown, a telescopic rod 43 is installed between the top rod 29 and the mounting shell 3, and a spring 42 is nested outside the telescopic rod 43. One end of the spring 42 is fixedly mounted on the mounting shell 3, and the other end of the spring 42 is fixedly mounted on the top rod 29.

[0039] The sliding columns 47 installed on the top rod 29 and distributed up and down respectively cooperate with the guide groove 45 on the mounting shell 3 and the oblique groove 46 on the rotating ring 31. When the rotating ring 31 rotates, under the joint action of the guide groove 45 and the oblique groove 46, the top rod 29 will move toward the center side of the mounting shell 3.

[0040] like Figure 8 As shown, five rotating shafts 36 are evenly and fixedly installed on the inner bottom surface of the mounting shell 3 in a circumferential direction.

[0041] like Figure 8 As shown, the bottom mold 4 is composed of five bottom mold components 49 distributed circumferentially. Fig. 9 As shown, each bottom mold assembly 49 includes a fan-shaped bottom plate 38, a side arc plate 37 and an L-shaped limit plate 40. The side arc plate 37 is fixedly installed on the upper side of the fan-shaped bottom plate 38, and the L-shaped limit plate 40 is fixedly installed on the lower side of the fan-shaped bottom plate 38.

[0042] like Figure 8As shown, for each bottom mold assembly 49, one corner of its fan-shaped bottom plate 38 is hingedly mounted on the rotating shaft 36 installed in the mounting shell 3, and the other corner of the fan-shaped bottom plate 38 is hingedly mounted with a connecting rod 34, and the other end of the connecting rod 34 is hingedly mounted on the inner wall surface of the transmission ring 32.

[0043] like Figure 8 As shown, an arc-shaped notch 39 is formed on the corner of the fan-shaped bottom plate 38 that is not connected to the rotating shaft 36 and the connecting rod 34. After the five base 6 components are put together, the arc-shaped notches 39 formed on the five fan-shaped bottom plates 38 form a complete circle.

[0044] like Figure 7 As shown, a gear 30 is rotatably mounted on the upper end of the mounting shell 3, and the gear 30 meshes with the teeth on the upper end of the transmission ring 32; the first motor 2 is fixedly mounted on the upper side of the mounting shell 3, and the output shaft of the first motor 2 is fixedly connected to the rotating shaft of the gear 30.

[0045] The operation of the first motor 2 drives the gear 30 to rotate, and the rotation of the gear 30 drives the transmission ring 32 to rotate. The rotation of the transmission ring 32 drives the rotating ring 31 to rotate through the volute spring 33 on the one hand, and on the other hand, the transmission ring 32 drives the five fan-shaped bottom plates 38 to swing through the connecting rod 34, that is, drives the five bottom mold assemblies 49 to swing, and controls the opening and closing of the bottom mold assemblies 49.

[0046] In the present invention, after the five bottom mold assemblies 49 are closed, two adjacent side arc plates 37 are tightly fitted together, and two adjacent fan-shaped bottom plates 38 are tightly fitted together.

[0047] When the rotating ring 31 in the present invention is driven to rotate, under the joint action of the guide slide groove 45 and the oblique slide groove 46, the push rod 29 will move toward the center side of the mounting shell 3, so that the arc-shaped pressure plate 41 on the push rod 29 is tightly pressed on the corresponding side arc plate 37, which has a pressing effect on the side arc plate 37 to prevent the side arc plate 37 from being stretched outward by lateral external force during the stamping process.

[0048] In the present invention, after the five bottom mold assemblies 49 are closed, the line connecting the rotating shaft 36 of the fan-shaped bottom plate 38 installed in each bottom mold assembly 49 and the corresponding connecting rod 34 and the hinged part of the fan-shaped bottom plate 38 is perpendicular to the corresponding top rod 29. This design can ensure that when the five bottom mold assemblies 49 are closed, the top rod 29 has a good locking effect on the bottom mold assembly 49, preventing the side arc plate 37 from being stretched outward by lateral external force during the stamping process.

[0049] The present invention sets a volute spring 33 between the rotating ring 31 and the transmission ring 32. Since the trajectory of the five bottom mold assemblies 49 moving toward the middle is an arc shape, and the movement trajectory of the push rod 29 is a lateral movement, in order to prevent the push rod 29 from moving to the front side of the movement trajectory of the bottom mold assembly 49 first and affecting the merging of the bottom mold assembly 49, the present invention designs a volute spring 33. After the transmission ring 32 drives the bottom mold assembly 49 to move a certain stroke, the compression degree of the volute spring 33 can drive the rotating ring 31 to rotate, thereby moving the push rod 29; after the push rod 29 is completely pressed on the corresponding bottom mold assembly 49, the volute spring 33 still has a certain compression force, which can ensure that the sliding column 47 on the push rod 29 is tightly pressed on the cross-section of the corresponding guide groove 45 and the oblique groove 46.

[0050] like Figure 1 As shown, a guide sleeve 17 is fixedly mounted on the upper side of the base 6. Figure 4 As shown, two guide grooves 15 are symmetrically opened on the inner side of the guide sleeve 17, and two guide blocks 14 are symmetrically fixedly installed on the lower end of the slide rod 13. The slide rod 13 is installed on the upper side of the guide sleeve 17 through the sliding fit between the two guide blocks 14 and the two guide grooves 15. An electric push rod 16 is installed in the guide sleeve 17, and the upper end of the electric push rod 16 is connected to the lower end of the slide rod 13; a screw 23 is installed on the upper end of the slide rod 13, as shown in FIG. Figure 6 As shown, the rotating thread sleeve 21 is installed on the screw rod 23 through threaded cooperation, a guide ring 28 is installed on the outer circumferential surface of the rotating thread sleeve 21, the transfer base column 19 is rotatably installed on the outer side of the rotating thread sleeve 21 through the guide ring 28, and a limit ring 22 is fixedly installed on the outer side of the transfer base column 19; a plunger 25 is installed on the upper end of the transfer base column 19, and the plunger 25 has evenly distributed air holes; a rubber pad 48 is installed on the upper end of the transfer base column 19; a piston 26 is installed on the upper end of the screw rod 23, and the piston 26 is located on the inner side of the transfer base column 19; five swing rods 27 are swingably installed on the upper end surface of the rotating thread sleeve 21, and the five swing rods 27 are evenly distributed circumferentially on the upper end surface of the rotating thread sleeve 21, and each swing rod 27 is hinged with a limit rod 24, and the end of the limit rod 24 away from the swing rod 27 passes through the outer side of the transfer base column 19; the five limit rods 24 correspond one by one to the five L-shaped limit plates 40 in the five bottom mold assemblies 49.

[0051] In the present invention, the adsorption force of the piston 26 on the stamping part 18 when it moves downward is relatively small. This adsorption force can ensure that the stamping part 18 will not be deviated when the five bottom mold assemblies 49 move outward. Moreover, this adsorption force can ensure that the stamping part 18 can be easily removed from the transmission rod after being blocked by the conveyor belt 11.

[0052] like Figure 1 , 2 As shown in Figure 3, a transmission mechanism 7 is installed on the upper side of the base 6.

[0053] like Figure 3 As shown, the transmission mechanism 7 includes a second support 8, a second motor 9, a transmission roller 10, and a transmission belt 11, wherein four transmission rollers 10 are rotatably mounted on the upper side of the base 6 through four second supports 8, two sections of the transmission belt 11 are symmetrically mounted on the four transmission rollers 10, and an avoidance area 12 is provided between the two sections of the transmission belt 11 for the transfer bottom column 19 to pass through; the second motor 9 is fixedly mounted on one of the second supports 8, and the output shaft of the second motor 9 is fixedly connected to the rotating shaft of one of the transmission rollers 10.

[0054] In the present invention, the adsorption force of the piston 26 on the stamping part 18 when it moves downward is relatively small. This adsorption force can ensure that the stamping part 18 will not be deviated when the five bottom mold assemblies 49 move outward. Moreover, this adsorption force can ensure that the stamping part 18 can be easily removed from the transmission rod after being blocked by the conveyor belt 11.

[0055] Implementation method: When the stamping die used in the present invention is used, when not in use, the electric push rod 16 is in the shortest state; when in use, first control the first motor 2 to work, the first motor 2 will drive the gear 30 to rotate, the gear 30 rotates and drives the transmission ring 32 to rotate, the transmission ring 32 rotates on the one hand and drives the rotating ring 31 to rotate through the volute spring 33, on the other hand, the transmission ring 32 drives the five fan-shaped bottom plates 38 to swing through the connecting rod 34, that is, drives the five bottom mold assemblies 49 to swing, so that the five bottom mold assemblies 49 are closed; after that, control the electric push rod 16 to work, the electric push rod 16 pushes the slide bar 13 to move up, and the slide bar 13 drives the screw rod 23 to move up. Because the screw rod 23 and the rotating threaded sleeve 21 are threadedly connected, in the absence of other external forces, the upward movement of the screw 23 will drive the transfer bottom column 19 to move up through the rotating threaded sleeve 21, and the limit ring 22 moved on the transfer bottom column 19 and the L-shaped limit ring 22 in the five bottom mold assemblies 49 After the bottom surface of the positioning plate 40 contacts, the upward movement of the transfer bottom column 19 is limited. At this time, the upper end of the transfer bottom column 19 is slightly lower than the upper bottom surface of the fan-shaped bottom plate 38 in the five bottom mold assemblies 49, and the upper end of the rubber pad 48 is slightly higher than the upper bottom surface of the fan-shaped bottom plate 38 in the five bottom mold assemblies 49; at this time, when the electric push rod 16 continues to push the slide rod 13 upward, the transfer bottom column 19 is in a relatively static state under the friction between the limiting ring 22 and the bottom surface of the L-shaped limiting plate 40 in the five bottom mold assemblies 49. In this state, the lower end of the slide rod 13 is limited and cannot rotate, so at this time the slide rod 13 drives the screw rod 23 to continue to move upward, which will cause the rotating threaded sleeve 21 to rotate, and the rotating threaded sleeve 21 drives the rocker rod 27 thereon to rotate, and the rocker rod 27 pushes the limit rod 24 to move outward and rest on the five L-shaped limit plates 40 installed on the lower side of the fan-shaped bottom plate 38 in the five bottom mold assemblies 49; the L-shaped limit plate 40 limits the limit rod 24, that is, limits the transfer bottom column 19, and then stamping can be carried out.

[0056] During the stamping process, the lower end of the stamping member 18 will press the rubber pad 48, causing the elastic rubber pad 48 to be compressed.

[0057] After the stamping is completed and the top die 1 moves up, the electric push rod 16 is first controlled to shorten. At this time, the L-shaped limit plate 40 limits the transfer bottom column 19, and the transfer bottom column 19 cannot move down. Then, when the electric push rod 16 drives the slide bar 13 to move down, the rotary thread sleeve 21 rotates. The rotation of the rotary thread sleeve 21 causes the five limit rods 24 to move inward, and at the same time, the screw rod 23 moves down. The downward movement of the screw 23 drives the piston 26 to move down. At this time, the stamping part 18 is close to the upper end of the transfer bottom column 19. During the downward movement of the piston 26, negative pressure will be formed in the space above the transfer bottom column 19. At this time, the rubber pad 48 plays a sealing role. Use; under the action of negative pressure, the stamping part 18 is adsorbed on the upper end of the transfer bottom column 19; during the rotation of the rotating threaded sleeve 21, when the five limit rods 24 are completely disengaged from the five L-shaped limit plates 40, the electric push rod 16 stops working; at this time, the first motor 2 is controlled to work so that the five bottom die assemblies 49 move outward and open, and during the opening process, the push rod 29 is reset under the action of the spring 42; when the five bottom die assemblies 49 are opened to make room for the stamping assembly to move downward, the electric push rod 16 is controlled to shorten, and the electric push rod 16 drives the stamping part 18 to move downward through the slide rod 13, the rotating threaded sleeve 21 and the transfer bottom column 19.

[0058] After the stamping part 18 moves down to contact the two sections of the conveyor belt 11, the transfer base column 19 passes through the avoidance area 12 and continues to move down, while the stamping part 18 is blocked by the conveyor belt 11 and detached from the transfer base column 19 and remains on the conveyor belt 11, and is taken out by the rotating conveyor belt 11 for collection.

[0059] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A stamping die, comprising a top die, a bottom die and a base, characterized in that: The top die is installed on the press, and the bottom die is installed on the upper side of the base; The mounting shell is fixedly mounted on the upper side of the base, the transmission ring is rotatably mounted on the mounting shell, and five rotating shafts are evenly and fixedly mounted on the inner bottom surface of the mounting shell; the bottom mold is composed of five circumferentially distributed bottom mold assemblies, each of which includes a fan-shaped bottom plate, a side arc plate and an L-shaped limit plate, the side arc plate is fixedly mounted on the upper side of the fan-shaped bottom plate, and the L-shaped limit plate is fixedly mounted on the lower side of the fan-shaped bottom plate; each bottom mold assembly has a corner of the fan-shaped bottom plate hingedly mounted on the rotating shaft installed in the mounting shell, and the other corner of the fan-shaped bottom plate is hingedly mounted with a connecting rod, and the other end of the connecting rod is hingedly mounted on the inner wall surface of the transmission ring; The corners of the fan-shaped bottom plate that are not connected to the rotating shaft and the connecting rod are provided with arc-shaped notches. When the five bottom mold assemblies are closed, the arc-shaped notches on the five fan-shaped bottom plates are combined into a complete circle. The mounting shell is provided with a first motor for controlling the rotation of the transmission ring; A guide sleeve is fixedly installed on the upper side of the base, and the slide rod is installed on the upper side of the guide sleeve through the sliding cooperation of the guide block and the guide groove. An electric push rod is installed in the guide sleeve, and the upper end of the electric push rod is connected with the lower end of the slide rod; a screw rod is installed on the upper end of the slide rod, and the rotating threaded sleeve is installed on the screw rod through thread cooperation, and the transfer bottom column is rotatably installed on the outer side of the rotating threaded sleeve, and a limiting ring is fixedly installed on the outer side of the transfer bottom column; a piston is installed on the upper end of the screw rod, and the piston is located on the inner side of the transfer bottom column; five rocker arms are swingably installed on the upper end surface of the rotating threaded sleeve, and the five rocker arms are evenly distributed circumferentially on the upper end surface of the rotating threaded sleeve, and a limiting rod is hinged on each rocker arm, and the end of the limiting rod away from the rocker arm passes through the outer side of the transfer bottom column; the five limiting rods correspond one by one to the five L-shaped limiting plates in the five bottom mold assemblies.

2. A stamping die according to claim 1, characterized in that: The installation shell is fixedly installed on the upper side of the base through four first supports, and the lower end surface of the installation shell is provided with five square notches evenly distributed in the circumferential direction.

3. A stamping die according to claim 1, characterized in that: The upper end surface of the mounting shell is provided with five circumferentially evenly distributed guide grooves, the rotating ring is rotatably mounted in the mounting shell, and a spiral spring is installed between the rotating ring and the transmission ring; the upper end surface of the rotating ring is provided with five oblique grooves evenly distributed circumferentially, the push rod is an L-shaped structure, an arc-shaped pressure plate is fixedly mounted on one end of the push rod, and sliding columns symmetrically distributed up and down are installed on the push rod, and the five push rods are circumferentially evenly slidably mounted on the mounting shell, the sliding column at the upper end of the push rod corresponds one by one to the guide grooves opened on the mounting shell and slides in cooperation with each other respectively, and the sliding column at the lower end of the push rod corresponds one by one to the five oblique grooves opened on the rotating ring and slides in cooperation with each other respectively; a telescopic rod is installed between the push rod and the mounting shell, a spring is nested on the outside of the telescopic rod, one end of the spring is fixedly mounted on the mounting shell, and the other end of the spring is fixedly mounted on the push rod.

4. A stamping die according to claim 1, characterized in that: The transmission ring is rotatably mounted on the mounting shell, and the outer wall surface of the upper end of the transmission ring is provided with teeth; a gear is rotatably mounted on the upper end of the mounting shell, and the gear meshes with the teeth on the upper end of the transmission ring; the first motor is fixedly mounted on the upper side of the mounting shell, and the output shaft of the first motor is fixedly connected to the rotating shaft of the gear.

5. A stamping die according to claim 1, characterized in that: The inner side of the guide sleeve is symmetrically provided with two guide grooves, the lower end of the slide rod is symmetrically fixed with two guide blocks, and the slide rod is installed on the upper side of the guide sleeve through the sliding cooperation between the two guide blocks and the two guide grooves.

6. A stamping die according to claim 1, characterized in that: A guide ring is installed on the outer circumferential surface of the rotating thread sleeve, and the transfer bottom column is rotatably installed on the outer side of the rotating thread sleeve through the guide ring.

7. A stamping die according to claim 1, characterized in that: A plunger is installed at the upper end of the transfer bottom column, and the plunger is provided with evenly distributed air holes; a rubber pad is installed at the upper end of the transfer bottom column.

8. A stamping die according to claim 3, characterized in that: The transmission ring is provided with five avoidance sliding grooves for avoiding the ejector rod.

9. A stamping die according to claim 1, characterized in that: It also includes an output mechanism, which includes a second support, a second motor, a transmission roller, and a transmission belt, wherein four transmission rollers are rotatably mounted on the upper side of the base through four second supports, two sections of transmission belts are symmetrically mounted on the four transmission rollers, and an escape zone is provided between the two sections of transmission belts for the transfer bottom column to pass through; the second motor is fixedly mounted on one of the second supports, and the output shaft of the second motor is fixedly connected to the rotating shaft of one of the transmission rollers.

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