High-precision metal part bud punching die

Abstract

The utility model relates to a high-precision metal piece bud punching die, which belongs to the technical field of metal wire processing, an external oil adding component is arranged on one side of the bud punching die, the bud punching die comprises an upper die set and a lower die set, the upper die set comprises an upper die seat, an upper padding plate, a fixing plate, a height limiting plate, a discharging plate and a bud punching male die which are arranged from top to bottom, the bud punching male die is connected with the fixing plate and penetrates through the height limiting plate to stretch into an upper forming hole of the discharging plate. The lower die set comprises a female die plate, a lower base plate, a lower die base, a bud punching female die insert and a stripping assembly, the female die plate, the lower base plate and the lower die base are sequentially arranged from top to bottom, a lower forming hole is formed in the female die plate, the bud punching female die insert is arranged in the lower forming hole and corresponds to the bud punching male die, and a lower forming hole is formed in the lower die plate. The stripping assembly is arranged in the lower die set and used for ejecting out the formed part. The external oil adding assembly is used for adding oil to the bud punching female die insert of the lower die set before die assembly, and the produced metal piece convex bud size is stable.

Description

A high-precision metal part punching die Technical Field

[0001] This utility model belongs to the field of metal wire processing technology, specifically relating to a high-precision metal part punching die. Background Technology

[0002] Currently, metal parts are typically formed in a single, one-step process when forming the punch, with lubricating oil dripped directly onto the material strip outside the mold. The mold itself lacks a dedicated lubrication function. Because metal has inherent shear strength, during punch forming, the punch compresses the metal material, causing it to flow into the die. Overcoming the metal's shear resistance, the frictional resistance between the metal and the die, and the demolding resistance of the punch after forming is crucial. This process easily leads to dimensional inconsistencies and deviations in the punch dimensions of high-precision metal parts, making it impossible to mass-produce consistently qualified products.

[0003] This solution was developed to improve the dimensional accuracy and stability of the protrusions in high-precision metal parts. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a high-precision metal part punching die that produces metal parts with stable punching dimensions.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a high-precision metal part punching die, wherein an external oiling component is provided on one side of the punching die, the punching die includes an upper die assembly and a lower die assembly, the upper die assembly includes an upper die base, an upper pad, a fixing plate, a height limiting plate, a stripper plate and a punching punch, the upper die base, the upper pad, the fixing plate, the height limiting plate and the stripper plate are arranged sequentially from top to bottom, the punching punch is connected to the fixing plate and extends through the height limiting plate into the upper forming hole of the stripper plate;

[0006] The lower die assembly includes a concave die plate, a lower backing plate, a lower die base, a punching die insert, and a stripper assembly. The concave die plate, the lower backing plate, and the lower die base are arranged sequentially from top to bottom. A lower forming hole is formed on the concave die plate. The punching die insert is disposed in the lower forming hole and corresponds to the punching punch. The stripper assembly is disposed in the lower die assembly and is used to eject the formed part. The external oiling assembly is used to oil the punching die insert of the lower die assembly before mold closing.

[0007] Furthermore, the fixing plate has a first mounting hole, and a first fixing plate insert and a second fixing plate insert are disposed in the first mounting hole. The first fixing plate insert is located at the bottom of the first mounting hole, the punching punch is connected to the lower surface of the first fixing plate insert, the second fixing plate insert is located below the first fixing plate insert and the punching punch is located between the second fixing plate inserts.

[0008] Furthermore, a discharge plate insert is provided on the side wall of the upper forming hole.

[0009] Furthermore, a pad is provided below the die insert.

[0010] Furthermore, a stripper block is provided inside the lower forming hole, and the punching die insert and pad block are located inside the stripper block.

[0011] Furthermore, the stripping assembly includes a force transmission rod and an elastic body. The lower pad has a transition hole, and the lower mold base has a second mounting hole. The axes of the lower forming hole, the transition hole, and the second mounting hole coincide. The elastic body is located inside the second mounting hole. One end of the force transmission rod abuts against the lower surface of the stripping block, and the other end of the force transmission rod abuts against the upper surface of the elastic body.

[0012] Furthermore, the elastic body is a rectangular spring.

[0013] Furthermore, a top plate is provided on the upper surface of the rectangular spring.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model introduces stamping oil into the step before the punching process by using an external oiling component. Compared with the traditional method of adding oil by dripping oil from outside the mold, this process arrangement can more effectively ensure lubrication during the punching process.

[0016] 2. In this invention, after the raw material enters the mold (between the concave die and the punch), the upper die assembly travels downwards for a period of time, and the stripper plate and concave die position and clamp the raw material. The upper die assembly continues its downward travel, and the punch begins to work, forcing the raw material into the punch die insert, thereby forming the desired feature on the material. Subsequently, the upper die assembly moves upwards, the upper and lower die assemblies open, the stripper assembly operates, and the formed part (punch feature) detaches from the punch die insert, completing one forming cycle. As the machine continues to operate, the mold performs the next punching cycle. Attached Figure Description

[0017] Figure 1 is a top view of the punching mold and external oiling assembly in this utility model;

[0018] Figure 2 is a cross-sectional view of a high-precision metal part punching mold in the mold-closed state according to this utility model.

[0019] Figure 3 is a cross-sectional view of a high-precision metal part punching die in the open state according to this utility model.

[0020] The markings in the diagram are as follows: 1. Upper module; 11. Upper die base; 12. Upper backing plate; 13. Fixing plate; 131. First fixing plate insert; 132. Second fixing plate insert; 14. Height limit plate; 15. Stripper plate; 151. Stripper plate insert; 16. Punching punch; 2. Lower module; 21. Die plate; 211. Stripper block; 22. Lower backing plate; 23. Lower die base; 24. Punching die insert; 241. Pad block; 25. Force transmission rod; 26. Elastomer; 3. External oiling assembly. Detailed Implementation

[0021] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0022] As shown in Figures 1-3, this embodiment provides a high-precision metal part stamping die, including an upper die assembly 1 and a lower die assembly 2. An external oiling component 3 is provided on one side of the stamping die. The external oiling component 3 can adopt a commonly used oiling structure in existing automation systems. An oil passage is provided inside the stamping die. When the raw material (stamped part) moves below the external oiling component 3, oil is automatically applied to the raw material (stamped part), causing an oil film to adhere to its surface, ensuring lubrication during the stamping process. The external oiling component 3 is used to apply oil to the stamping die insert 24 of the lower die assembly 2 before die closing, introducing stamping oil to the step before the stamping process. This oil supply method is more effective than the traditional external dripping oil addition method, ensuring more efficient lubrication during the stamping process.

[0023] The upper module 1 includes an upper mold base 11, an upper pad 12, a fixing plate 13, a height limiting plate 14, a stripper plate 15, and a punching punch 16. The upper mold base 11, upper pad 12, fixing plate 13, height limiting plate 14, and stripper plate 15 are arranged sequentially from top to bottom. The fixing plate 13 has a first mounting hole. A first fixing plate insert 131 and a second fixing plate insert 132 are arranged in the first mounting hole. The first fixing plate insert 131 is located at the bottom of the first mounting hole. The punching punch 16 is connected to the lower surface of the first fixing plate insert 131. The second fixing plate insert 132 is located below the first fixing plate insert 131, and the punching punch 16 is located between the second fixing plate inserts 132. The punching punch 16 is connected to the fixing plate 13 and extends through the height limiting plate 14 into the upper forming hole of the stripper plate 15. The stripper plate insert 151 is arranged on the side wall of the upper forming hole.

[0024] The lower die assembly 2 includes a concave die plate 21, a lower backing plate 22, a lower die base 23, a punch die insert 24, and a stripper assembly. The concave die plate 21, the lower backing plate 22, and the lower die base 23 are arranged sequentially from top to bottom. A lower forming hole is formed on the concave die plate 21. The punch die insert 24 is disposed in the lower forming hole. Specifically, a pad block 241 is disposed below the punch die insert 24, and a stripper block 211 is disposed in the lower forming hole. The punch die insert 24 and the pad block 241 are located in the stripper block 211. The punch die insert 24 corresponds to the punch punch 16.

[0025] The stripping assembly is located in the lower mold 2 and is used to eject the formed parts. The stripping assembly includes a force transmission rod 25 and an elastic body 26. The lower pad 22 has a transition hole, and the lower mold base 23 has a second mounting hole. The axes of the lower forming hole, the transition hole, and the second mounting hole are coincident. The elastic body 26 is located in the second mounting hole. One end of the force transmission rod 25 abuts against the lower surface of the stripping block 211, and the other end of the force transmission rod 25 abuts against the upper surface of the elastic body 26. Specifically, the elastic body 26 is a rectangular spring. A top plate is provided on the upper surface of the rectangular spring. The top plate is fixedly connected to the upper end of the rectangular spring, and the other end of the force transmission rod 25 abuts against the top plate.

[0026] Working principle: After the raw material enters the mold (between the concave die 21 and the punch 16), the upper die 1 travels downwards for a period of time, and the stripper plate 15 and the concave die 21 position and clamp the raw material. The upper die 1 continues to travel downwards for the next period of time, and the punch 16 starts to work, forcing the raw material into the punch die insert 24, thereby forming the required feature on the material. At this time, the rectangular spring is compressed and moves downwards. Subsequently, the upper die 1 moves upwards, the upper die 1 and the lower die 2 open, the rectangular spring releases its stored energy, and pushes the stripper block 211 through the force transmission rod 25 to make the raw material move upwards, so that the formed part (punch feature) is separated from the punch die insert 24 to complete one forming cycle. As the machine continues to move, the mold performs the next punching cycle.

[0027] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. A high-precision metal part stamping die, characterized in that: An external oiling component is provided on one side of the punching die. The punching die includes an upper die assembly and a lower die assembly. The upper die assembly includes an upper die base, an upper backing plate, a fixing plate, a height limiting plate, a stripper plate, and a punching punch. The upper die base, upper backing plate, fixing plate, height limiting plate, and stripper plate are arranged sequentially from top to bottom. The punching punch is connected to the fixing plate and extends through the height limiting plate into the upper forming hole of the stripper plate. The lower die assembly includes a concave die plate, a lower backing plate, a lower die base, a punching die insert, and a stripping component. The concave die plate, lower backing plate, and lower die base are arranged sequentially from top to bottom. A lower forming hole is formed on the concave die plate. The punching die insert is disposed in the lower forming hole and corresponds to the punching punch. The stripping component is disposed in the lower die assembly and is used to eject the formed part. The external oiling component is used to oil the punching die insert of the lower die assembly before the die is closed.

2. The high-precision metal part punching die according to claim 1, characterized in that: The fixing plate has a first mounting hole, and a first fixing plate insert and a second fixing plate insert are disposed in the first mounting hole. The first fixing plate insert is located at the bottom of the first mounting hole. The punching punch is connected to the lower surface of the first fixing plate insert. The second fixing plate insert is located below the first fixing plate insert and the punching punch is located between the second fixing plate inserts.

3. The high-precision metal part stamping die according to claim 1, characterized in that: A discharge plate insert is provided on the side wall of the upper forming hole.

4. A high-precision metal part stamping die according to claim 1, characterized in that: A pad is provided below the die insert.

5. A high-precision metal part punching die according to claim 4, characterized in that: A stripper block is provided inside the lower forming hole, and the punching die insert and pad are located inside the stripper block.

6. A high-precision metal part punching die according to claim 5, characterized in that: The stripping assembly includes a force transmission rod and an elastic body. The lower pad has a transition hole, and the lower mold base has a second mounting hole. The axes of the lower forming hole, the transition hole, and the second mounting hole coincide. The elastic body is located inside the second mounting hole. One end of the force transmission rod abuts against the lower surface of the stripping block, and the other end of the force transmission rod abuts against the upper surface of the elastic body.

7. A high-precision metal part stamping die according to claim 6, characterized in that: The elastic body is a rectangular spring.

8. A high-precision metal part stamping die according to claim 7, characterized in that: The upper surface of the rectangular spring is provided with a top plate.

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