High-speed stamping composite die

Abstract

The utility model relates to the field of mechanical stamping dies, through an ejector block arranged in a fixed die assembly, in the stamping process, when an appearance punch moves in the direction close to the fixed die assembly and in the direction away from the fixed die assembly, the ejector block abuts against the side, away from the appearance punch, of an annular body, and when the appearance punch moves in the direction away from the fixed die assembly, the ejector block abuts against the side, away from the appearance punch, of the annular body; when the gasket is punched, the annular body is pushed back to the material belt through the ejector block, then the annular body is brought out of the punching composite die through the material belt, punching machining of the gasket is completed, and therefore the production efficiency of the gasket is improved, and it is guaranteed that the gasket does not deform in the high-speed punching process.

Description

Technical Field

[0001] The utility model relates to the field of mechanical stamping dies, in particular to a high-speed stamping composite die. Background Art

[0002] Gaskets play an important role in various components. When we need to tighten two connectors, we often put a gasket under the nut so that when the nut is tightened, the gasket can rely on friction to achieve the effect of preventing loosening.

[0003] like Figure 1 As shown, the gasket 1 corresponding to the present application includes an annular body 11, and an inner hole 10 is provided on the annular body 11. For high-precision gaskets, a composite stamping die is usually used for production, that is, the inner hole of the gasket and the gasket body are stamped once. However, after the composite die is stamped, the gasket cannot fall from the outer shape die, but remains in the outer shape die after the stamping is completed. Then, the gasket is ejected from the outer shape die by the ejector, and finally blown away from the die by compressed air. Due to the limitation of this discharge method, the stamping speed can generally only reach a maximum of 80 times per minute. If the stamping speed is increased, the gasket will not be able to leave the composite stamping die in time, resulting in interruption of stamping production and affecting the production efficiency of the gasket. In addition, if the stamping speed is increased, the gasket will be deformed during the stamping process, resulting in the scrapping of the gasket. Therefore, a high-speed stamping composite die is needed to improve the production efficiency of the gasket and ensure that the gasket will not be deformed during high-speed stamping. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a high-speed stamping composite die, which improves the production efficiency of the gasket and ensures that the gasket will not be deformed during high-speed stamping.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A high-speed stamping composite die is used to punch out a gasket on a material strip, characterized in that: the gasket includes an annular body, and the annular body is provided with an inner hole; it includes: a fixed die assembly and a movable die assembly, the movable die assembly includes an outer shape punch, and the shape of the end of the outer shape punch corresponds to the annular body, the fixed die assembly includes an outer shape die, a top block and an inner hole punch arranged at the front end of the outer shape punch, the outer shape die is adapted to the outer edge shape of the annular body, the shape of the end of the inner hole punch corresponds to the inner hole, the top block is sleeved on the inner hole punch, the top block is elastically floatingly arranged, and in the process of the outer shape punch punching out the annular body, the top block abuts against the side of the annular body away from the outer shape punch. As a preferred embodiment of the present application, a high-speed stamping composite die of the present application, first, feeds the material strip into the stamping composite die, and under the action of a preset stamping thrust, the inner hole punch and the outer shape punch work together to punch out the inner hole, and the outer shape punch and the outer shape die work together to punch out the annular body. During the stamping process, the outer shape punch presses the material strip to move toward the fixed die assembly, and the top block contacts the side of the annular body away from the outer shape punch. The annular body gradually enters the outer shape die, and the top block is acted upon by the stamping thrust. Due to the top block The elastic floating setting allows the top block to firmly contact the annular body. Under the joint extrusion of the top block and the outer shape punch on the annular body, deformation of the annular body during the stamping process is avoided. After the annular body is separated from the material strip, the outer shape punch begins to retract, and the top block moves in the retraction direction of the outer shape punch to reset. At this time, the top block and the outer shape punch clamp the annular body and send the annular body out of the outer shape die. When the outer shape punch separates from the annular body, the top block pushes the annular body back onto the material strip, and then uses the material strip to bring the annular body out of the stamping composite die.

[0007] Furthermore, in a high-speed stamping composite die in the present application, the fixed die assembly includes a set of disc springs, and the disc springs abut against one end of the ejector block away from the movable die assembly. As a preferred embodiment of the present application, the disc springs in a high-speed stamping composite die in the present application provide a reaction force to the ejector block during the stamping process, so that the ejector block can be stably abutted against the side of the annular body away from the outer punch during the stamping process.

[0008] Furthermore, in a high-speed stamping composite die in the present application, a cavity for floating the ejector block is provided in the outer shape die, a convex portion is provided radially on the outer side of the ejector block, a limiting groove for the movable convex portion is provided on the inner side wall of the outer shape die, a limiting surface is provided axially on the limiting groove, and the limiting surface includes a first limiting surface, the first limiting surface is provided on the side of the limiting groove close to the movable mold assembly, when the convex portion is in contact with the first limiting surface, the side of the ejector block close to the movable mold assembly is flush with the side of the outer shape die close to the movable mold assembly. As a preferred embodiment of the present application, a cavity in a high-speed stamping composite die of the present application is used to accommodate the ejector block, during the stamping process, the ejector block moves toward the movable mold assembly, when the convex portion is in contact with the first limiting surface, the first limiting surface limits the ejector block so that the ejector block cannot move toward the movable mold assembly, at this time, the side of the ejector block close to the movable mold assembly is flush with the side of the outer shape die close to the movable mold assembly, and the ejector block pushes the annular body back onto the material strip.

[0009] Furthermore, in a high-speed stamping composite die in the present application, the fixed die assembly is arranged at the upper end of the movable die assembly. As a preferred solution of the present application, a high-speed stamping composite die in the present application is in an upper and lower structure, with the fixed die assembly at the upper end and the movable die assembly at the lower end, and the inner hole punch in the fixed die assembly and the outer shape punch in the movable die assembly are arranged opposite to each other, and in the stamping process, they respectively contact the upper end face and the lower end face of the annular body.

[0010] Furthermore, in a high-speed stamping composite die of the present application, the outer punch is provided with a blanking through hole, and the blanking through hole is arranged at a position of the outer punch corresponding to the inner hole. As a preferred embodiment of the present application, the blanking through hole in a high-speed stamping composite die of the present application is used for waste material that is adapted to the outer shape of the inner hole to fall in.

[0011] Furthermore, in a high-speed stamping composite die in the present application, the upper aperture of the blanking through hole is larger than the aperture of the inner hole, the upper aperture of the blanking through hole is smaller than the lower aperture, and the aperture of the blanking through hole gradually increases axially downward. As a preferred embodiment of the present application, the aperture of the blanking through hole in a high-speed stamping composite die in the present application gradually increases axially downward. This design is to prevent waste materials that are adapted to the shape of the inner hole from being stuck in the blanking through hole during the stamping process, causing production interruption.

[0012] Furthermore, in a high-speed stamping composite die in the present application, the fixed die assembly further comprises a pressure plate, and the pressure plate abuts against a side of the disc spring away from the top block. As a preferred embodiment of the present application, the pressure plate in a high-speed stamping composite die in the present application provides a reaction force to the disc spring during the stamping process.

[0013] Furthermore, the high-speed stamping composite die in the present application further includes: a positioning plate, which is arranged on the side of the movable die assembly near the fixed die assembly. As a preferred embodiment of the present application, the positioning plate in the high-speed stamping composite die in the present application is used to place the material strip.

[0014] Furthermore, in a high-speed stamping composite die in the present application, a limit block is provided at the upper end of the outer shape die, the limit block is provided on the side of the outer shape die away from the movable die assembly, the limit surface also includes a second limit surface, the second limit surface is provided on the side of the limit groove away from the movable die assembly, and the second limit surface is provided on the limit block. As a preferred embodiment of the present application, a limit block in a high-speed stamping composite die of the present application is designed separately from the outer shape die, and such a design is for the convenience of installing the top block. The top block moves in a direction away from the movable die assembly, and when the convex portion fits with the second limit surface, the second limit surface limits the top block so that the top block cannot move in a direction away from the movable die assembly, and the second limit surface is used to protect the disc spring and prevent the top block from damaging the disc spring.

[0015] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0016] The utility model provides a high-speed stamping composite die, through the top block set in the fixed die assembly, when the outer shape punch moves in the direction close to the fixed die assembly and moves away from the fixed die assembly, the top block abuts against the side of the annular body away from the outer shape punch. When the outer shape punch moves in the direction close to the fixed die assembly, the top block and the outer shape punch jointly extrude the annular body, thereby preventing the annular body from being deformed during the stamping process; when the outer shape punch moves in the direction away from the fixed die assembly, the top block abuts against the side of the annular body away from the outer shape punch, pushing the annular body back onto the material belt, and then using the material belt to bring the annular body out of the stamping composite die, the present application adopts this special discharging method, improves the stamping speed, and the stamping speed can reach 500-1000 times per minute, thereby improving the production efficiency of the gasket and ensuring that the gasket does not deform during the high-speed stamping process.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a gasket corresponding to a high-speed stamping composite die in an embodiment of the present application;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of a high-speed stamping composite die in an embodiment of the present application.

[0019] In the figure: 1-gasket; 10-inner hole; 11-annular body; 2-fixed mold assembly; 21-outer die; 210-cavity; 211-limiting groove; 2111-limiting surface; 21111-first limiting surface; 21112-second limiting surface; 212-limiting block; 22-top block; 221-convex portion; 23-inner hole punch; 24-disc spring; 25-pressing plate; 3-movable mold assembly; 31-outer punch; 311-blank through hole; 32-limiting step; 4-positioning plate. DETAILED DESCRIPTION Example

[0020] like Figure 1 , 2 As shown, a high-speed stamping composite die is used to punch out a gasket 1 on a material strip, wherein the gasket 1 includes an annular body 11, and an inner hole 10 is provided on the annular body 11, comprising: a fixed die assembly 2 and a movable die assembly 3, wherein the movable die assembly 3 includes an outer shape punch 31, and the end shape of the outer shape punch 31 corresponds to the annular body 11, and the fixed die assembly 2 includes an outer shape die 21, a top block 22 and an inner hole punch 23 arranged at the front end of the outer shape punch 31, wherein the outer shape die 21 is adapted to the outer edge shape of the annular body 11, and the end shape of the inner hole punch 23 corresponds to the inner hole 10, and the top block 22 is sleeved on the inner hole punch 23, and the top block 22 is elastically floatingly arranged, and during the process of the outer shape punch 31 punching out of the annular body 11, the top block 22 abuts against the side of the annular body 11 away from the outer shape punch 31.

[0021] In this embodiment, first, the material strip is fed into the stamping composite die. Under the action of the preset stamping thrust, the inner hole punch 23 and the outer shape punch 31 work together to punch out the inner hole 10, and the outer shape punch 31 and the outer shape die 21 work together to punch out the annular body 11. During the stamping process, the outer shape punch 31 pushes the material strip to move in the direction close to the fixed die assembly 2, and the top block 22 abuts against the side of the annular body 11 away from the outer shape punch 31. The annular body 11 gradually enters the outer shape die 21, and the top block 22 is subjected to the stamping thrust. Due to the elastic floating setting of the top block 22, the top block 22 firmly abuts against the fixed die assembly 2. The annular body 11 is prevented from being deformed during the stamping process by the ejector block 22 and the outer punch 31 extruding the annular body 11. After the annular body 11 is separated from the material strip, the outer punch 31 begins to retract, and the ejector block 22 moves to the retraction direction of the outer punch 31 to reset. At this time, the ejector block 22 and the outer punch 31 clamp the annular body 11 and send the annular body 11 out of the outer die 21. When the outer punch 31 is separated from the annular body 11, the ejector block 22 pushes the annular body 11 back onto the material strip, and then uses the material strip to bring the annular body 11 out of the stamping composite die. The shape of the inner hole 10 and the outer edge of the annular body 11 are both circular. By setting the ejector block 22 in the fixed die assembly 2, when the outer punch 31 moves in the direction close to the fixed die assembly 2 and moves away from the fixed die assembly 2, the ejector block 22 abuts against the side of the annular body 11 away from the outer punch 31. When the outer shape punch 31 moves toward the direction approaching the fixed die assembly 2, the top block 22 and the outer shape punch 31 jointly extrude the annular body 11, thereby preventing the annular body 11 from deforming during the stamping process; when the outer shape punch 31 moves toward the direction away from the fixed die assembly 2, the top block 22 abuts against the side of the annular body 11 away from the outer shape punch 31, pushing the annular body 11 back onto the material belt, and then using the material belt to bring the annular body 11 out of the stamping composite die, completing the stamping process of the gasket 1, thereby improving the production efficiency of the gasket 1 and ensuring that the gasket 1 does not deform during high-speed stamping.

[0022] In this embodiment, the fixed die assembly 2 includes a group of disc springs 24, and the disc springs 24 abut against one end of the top block 22 away from the movable die assembly 3. During the stamping process, the disc springs 24 provide a reaction force to the top block 22, so that it can firmly abut against the side of the annular body 11 away from the outer punch 31 during the stamping process. A group of the disc springs 24 is installed on the side of the top block 22 away from the movable die assembly 3, and a group of the disc springs 24 is sleeved on the inner hole punch 23. A group of the disc springs 24 includes 5 disc springs 24, and the disc springs 24 can be selected based on the size, thickness and other factors of the stamped gasket 1. The combination of the disc springs 24 can also be changed during production to achieve different reaction forces.

[0023] In this embodiment, a cavity 210 is provided in the outer shape die 21 for the top block 22 to float, a convex portion 221 is provided on the radial outer side of the top block 22, a limiting groove 211 is provided on the inner side wall of the outer shape die 21 for the convex portion 221 to move, and a limiting surface 2111 is provided axially on the limiting groove 211, and the limiting surface 2111 includes a first limiting surface 21111, and the first limiting surface 21111 is provided on the side of the limiting groove 211 close to the movable mold assembly 3. When the convex portion 221 is in contact with the first limiting surface 21111, the side of the top block 22 close to the movable mold assembly 3 is flush with the side of the outer shape die 21 close to the movable mold assembly 3. The cavity 210 is used to accommodate the top block 22. During the stamping process, the top block 22 moves toward the movable mold assembly 3. When the convex portion 221 is in contact with the first limiting surface 21111, the first limiting surface 21111 limits the top block 22, so that the top block 22 cannot move toward the movable mold assembly 3. At this time, the side of the top block 22 close to the movable mold assembly 3 is flush with the side of the outer shape die 21 close to the movable mold assembly 3, and the top block 22 pushes the annular body 11 back onto the material strip.

[0024] In this embodiment, the fixed mold assembly 2 is arranged at the upper end of the movable mold assembly 3. The fixed mold assembly 2 and the movable mold assembly 3 are in an upper and lower structure, with the fixed mold assembly 2 on the upper side and the movable mold assembly 3 on the lower side. The inner hole punch 23 in the fixed mold assembly 2 and the outer shape punch 31 in the movable mold assembly 3 are arranged opposite to each other, and during the stamping process, they respectively contact the upper end surface and the lower end surface of the annular body 11. The fixed mold assembly 2 and the movable mold assembly 3 are arranged opposite to each other.

[0025] In this embodiment, the outer punch 31 is provided with a blanking hole 311, which is arranged at a position of the outer punch 31 corresponding to the inner hole 10. The blanking hole 311 is used for waste materials that are adapted to the outer shape of the inner hole 10 to fall in, and the blanking hole 311 is circular in shape.

[0026] In this embodiment, the upper aperture of the blanking through hole 311 is larger than the aperture of the inner hole 10, the upper aperture of the blanking through hole 311 is smaller than the lower aperture, and the aperture of the blanking through hole 311 gradually increases axially downward. The aperture of the blanking through hole 311 gradually increases axially downward, and this design is to prevent waste materials that are adapted to the shape of the inner hole 10 from being stuck in the blanking through hole 311 during the stamping process, causing production interruption.

[0027] In this embodiment, the fixed die assembly 2 further includes a pressing plate 25, which abuts against a side of the disc spring 24 away from the top block 22. During the stamping process, the pressing plate 25 provides a reaction force to the disc spring 24. The pressing plate 25 is installed on a side of the disc spring 24 away from the top block 22, and the inner hole punch 23 is penetrated on the pressing plate 25.

[0028] In this embodiment, it also includes: a positioning plate 4, which is arranged on the side of the movable mold assembly 3 near the fixed mold assembly 2. The positioning plate 4 is used to place the material strip. The movable mold assembly 3 also includes a limiting step 32, which is arranged on the outside of the outer shape punch 31. The outer shape punch 31 moves in the direction close to the fixed mold assembly 2. The side of the limiting step 32 near the fixed mold assembly 2 abuts against the side of the positioning plate 4 near the movable mold assembly 3. The positioning plate 4 limits the limiting step 32 so that the limiting step 32 cannot move in the direction close to the fixed mold assembly 2. Since the limiting step 32 is located on the outside of the outer shape punch 31, the outer shape punch 31 cannot move in the direction close to the fixed mold assembly 2, so as to prevent the outer shape punch 31 from damaging the inside of the fixed mold assembly 2.

[0029] In this embodiment, a limit block 212 is provided at the upper end of the outer shape die 21, and the limit block 212 is provided on the side of the outer shape die 21 away from the movable mold assembly 3, and the limit surface 2111 also includes a second limit surface 21112, and the second limit surface 21112 is provided on the side of the limit groove 211 away from the movable mold assembly 3, and the second limit surface 21112 is provided on the limit block 212. The limit block 212 is designed separately from the outer shape die 21, and this design is for the convenience of installing the top block 22. The outer shape of the outer shape die 21, the top block 22, and the limit block 212 are all annular. The top block 22 moves in the direction away from the movable mold assembly 3. When the protrusion 221 is in contact with the second limiting surface 21112, the second limiting surface 21112 limits the top block 22 so that the top block 22 cannot move in the direction away from the movable mold assembly 3. The second limiting surface 21112 is used to protect the disc spring 24 to prevent the top block 22 from damaging the disc spring 24.

[0030] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanation here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A high-speed stamping composite die for stamping a gasket (1) on a material strip, characterized in that: The gasket (1) comprises an annular body (11), and an inner hole (10) is provided on the annular body (11); The invention comprises: a fixed die assembly (2) and a movable die assembly (3), wherein the movable die assembly (3) comprises an outer shape punch (31), the end shape of the outer shape punch (31) corresponds to the annular body (11), the fixed die assembly (2) comprises an outer shape die (21) arranged at the front end of the outer shape punch (31), a top block (22) and an inner hole punch (23), the outer shape die (21) is adapted to the outer edge shape of the annular body (11), the end shape of the inner hole punch (23) corresponds to the inner hole (10), the top block (22) is sleeved on the inner hole punch (23), the top block (22) is elastically floatingly arranged, and in the process of the outer shape punch (31) punching out of the annular body (11), the top block (22) contacts the side of the annular body (11) away from the outer shape punch (31).

2. A high-speed stamping composite die according to claim 1, characterized in that: The fixed mold assembly (2) comprises a group of disc springs (24), and the disc springs (24) abut against one end of the top block (22) away from the movable mold assembly (3).

3. The high-speed stamping composite die according to claim 1, characterized in that: The outer shape die (21) is provided with a cavity (210) in which the top block (22) can float, the top block (22) is provided with a convex portion (221) on the radially outer side, the inner side wall of the outer shape die (21) is provided with a limiting groove (211) in which the convex portion (221) can move, the limiting groove (211) is provided with a limiting surface (2111) in the axial direction, the limiting surface (2111) comprises a first limiting surface (21111), the first limiting surface (21111) is provided on a side of the limiting groove (2111) close to the movable mold assembly (3), when the convex portion (221) is in contact with the first limiting surface (21111), the side of the top block (22) close to the movable mold assembly (3) is flush with the side of the outer shape die (21) close to the movable mold assembly (3).

4. The high-speed stamping composite die according to claim 1, characterized in that: The fixed mold assembly (2) is arranged at the upper end of the movable mold assembly (3).

5. The high-speed stamping composite die according to claim 4, characterized in that: The outer shape punch (31) is provided with a blanking through hole (311), and the blanking through hole (311) is arranged at a position of the outer shape punch (31) corresponding to the inner hole (10).

6. The high-speed stamping composite die according to claim 5, characterized in that: The upper aperture of the blanking through hole (311) is larger than the aperture of the inner hole (10), the upper aperture of the blanking through hole (311) is smaller than the lower aperture, and the aperture of the blanking through hole (311) gradually increases in the axial direction downward.

7. The high-speed stamping composite die according to claim 1, characterized in that: The fixed die assembly (2) further comprises a pressing plate (25), wherein the pressing plate (25) abuts against a side of the disc spring (24) away from the top block (22).

8. The high-speed stamping composite die according to claim 1, characterized in that: Also includes: A positioning plate (4), wherein the positioning plate (4) is arranged on a side of the movable mold assembly (3) close to the fixed mold assembly (2).

9. The high-speed stamping composite die according to claim 3, characterized in that: A limit block (212) is provided at the upper end of the outer shape die (21), the limit block (212) being arranged on a side of the outer shape die (21) away from the movable die assembly (3), the limit surface (2111) further comprising a second limit surface (21112), the second limit surface (21112) being arranged on a side of the limit groove (211) away from the movable die assembly (3), the second limit surface (21112) being arranged on the limit block (212).

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