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A close-distance punching die with smooth punching surface

A close-range, punching surface technology, applied in the field of stamping die, can solve the problems of punching surface burr, easy to collapse, insufficient strength of inserts, etc., to avoid burrs and not easy to deform.

Active Publication Date: 2022-03-15
SHENZHEN EVA PRECISION TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the die is used to punch two holes at the same time in one process, the thickness of the insert at the edge of the lower die will be thinner because the distance between the holes is too close, which will lead to insufficient strength of the insert and easy collapse during the production process
[0003] In the existing dies that can be punched at close distances, the lower die insert is formed by splicing three parts. When any two parts are spliced ​​together, a splicing seam perpendicular to the punching edge is formed. When punching, the splicing seam is likely to cause the workpiece to Burrs appear on the blanking surface of the punched hole

Method used

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  • A close-distance punching die with smooth punching surface
  • A close-distance punching die with smooth punching surface
  • A close-distance punching die with smooth punching surface

Examples

Experimental program
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Effect test

Embodiment 1

[0026] see Figure 1 to Figure 6 , the figure shows a close-distance punching die with a smooth punching surface provided by Embodiment 1 of the present invention, including:

[0027] An upper mold mechanism 1, which includes an upper template 11, the bottom of the upper template 11 is provided with a first punch 12 and a second punch 13 arranged in parallel;

[0028] Lower mold mechanism 2, it comprises lower template 21, and workpiece is placed on lower template 21, and lower template 21 is provided with plunger 3, and plunger 3 comprises first plunger unit 31, second plunger unit 32 and the 3rd plunger Unit 33, one side of the second sub-unit 32 is spliced ​​with the first sub-unit 31 to form the first blanking channel 4 corresponding to the first punch 12, the splicing surface of the second sub-unit 32 and the first sub-unit 31 It is a slope, the other side of the second sub-unit 32 is spliced ​​with the third sub-unit 33 to form the second blanking channel 5 correspondin...

Embodiment 2

[0036] see Figure 1 to Figure 6 , the figure shows a close-distance punching die with a smooth blanking surface provided by Embodiment 2 of the present invention. On the basis of the above embodiments, this embodiment further makes the following technical solutions as improvements: the first A blanking channel 4 is sequentially provided with a first blanking part 41 and a second blanking part 42 from top to bottom, and the radial cross-sectional area of ​​the first blanking part 41 is smaller than the radial cross-sectional area of ​​the second blanking part 42; The first punch 12 is provided with a second stripping thimble 122 parallel to the first stripping thimble 121 , and the length of the second stripping thimble 122 is greater than the length of the first stripping thimble 121 .

[0037] In order to ensure the compressive strength of the second sub-unit, the diameter of the part formed by the punching edge in the middle of the second sub-unit gradually increases from t...

Embodiment 3

[0040] see Figure 1 to Figure 6 , the figure shows a close-distance punching die with a smooth blanking surface provided by Embodiment 3 of the present invention. On the basis of the above embodiments, this embodiment further makes the following technical solutions as improvements: the first The ends of the two stripping thimbles 122 are arc-shaped.

[0041] The end of the second stripping thimble is arc-shaped, and the contact area with the waste material is small, so as to avoid interfering with the rotation of the waste material.

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Abstract

The invention provides a close-distance punching die with a smooth punching section, which includes an upper die mechanism and a lower die mechanism, the upper die mechanism includes an upper template, and the bottom of the upper template is provided with a first punch and a second punch arranged in parallel; The lower mold mechanism includes a lower template, on which the workpiece is placed, and an insert is arranged on the lower template, and the insert includes a first insert unit, a second insert unit and a third insert unit, and one side of the second insert unit is connected to the The first sub-unit is spliced ​​to form the first blanking channel corresponding to the first punch, the splicing surface of the second sub-unit and the first sub-unit is a slope, and the other side of the second sub-unit is connected to the third sub-unit Splicing forms the second blanking channel corresponding to the second punch, and the splicing surface of the second sub-unit and the third sub-unit is an inclined plane. The present invention provides a close-distance punching die with a smooth punching surface. The splicing faces of each part of the combined lower die are sloped to prevent the splicing seam from affecting the smoothness of the inner surface of the punching hole.

Description

technical field [0001] The invention relates to a punching die, in particular to a close-distance punching die with a smooth punching surface. Background technique [0002] In the technology of metal stamping dies, the two holes that are very close to each other in the product generally can only pass through two stamping processes, and use different dies for punching. The increase in die development costs and processes increases production costs. If the mold is used to punch two holes at the same time in one process, because the distance between the holes is too close, the thickness of the insert at the edge of the lower die will be thin, which will lead to insufficient strength of the insert and it will easily collapse during the production process. [0003] In the existing dies that can be punched at close distances, the lower die insert is formed by splicing three parts. When any two parts are spliced ​​together, a splicing seam perpendicular to the punching edge is forme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D28/14B21D28/34B21D28/24B21D45/10
CPCB21D28/14B21D28/34B21D28/24B21D45/10
Inventor 张海曾文伟何亚超
Owner SHENZHEN EVA PRECISION TECH GRP CO LTD