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Method for processing inside-length convex key of metal thin-wall workpiece

A processing method and thin metal technology, which is applied in the field of processing long convex keys in the electrical connector shell, to achieve the effects of reduced pressure, improved survival rate, and fast work efficiency

Active Publication Date: 2010-12-29
CHINA NORTH IND GRP HANGLIAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]The purpose of the present invention is to overcome the stress concentration produced by using the die head as a flat mouth for horizontal punching in the prior art, which can only realize the punching of short convex keys, and the traditional There are many processes and high cost in processing long convex keys, and a kind of metal thin-walled workpiece inner length with simple process, low production cost, improved work efficiency, stress reduction and high yield rate is provided by using a die with a notch for horizontal punching. Processing method of convex key

Method used

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  • Method for processing inside-length convex key of metal thin-wall workpiece
  • Method for processing inside-length convex key of metal thin-wall workpiece
  • Method for processing inside-length convex key of metal thin-wall workpiece

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Effect test

Embodiment 1

[0024] Such as image 3 The head shell of a circular electrical connector made of aluminum matrix material is shown. After the workpiece is finally formed, the thickness of the thinnest part of the workpiece is only 0.5mm, which is a typical metal circular thin-walled workpiece. The inner length of the head shell is The dimensions of the convex key 6 are: length 9.0mm, width 1.2mm, height 0.9mm.

[0025] For the inner long convex key of the head shell and the seat shell of the above-mentioned circular electrical connector, after punching with a flat punch, in the subsequent finishing process, more than 90% of the shells have differences due to punching parts. The degree of crack cracking phenomenon and scrap treatment.

[0026] According to processing method of the present invention, realize pairing according to following operation image 3 The processing of the inner long convex key of the head shell and the seat shell of the circular electrical connector made of the alumin...

Embodiment 2

[0033] Such as Figure 4 Shown is the housing of a rectangular electrical connector made of stainless steel. After the final molding of the workpiece, the thickness of the thin wall is only 1.5mm. The dimensions of the long convex key 7 in the housing are: length 8.0mm, width 1.4mm, height 1.2mm.

[0034] The processing steps of the long convex key in the rectangular connector shell are the same as in the first embodiment, but the relevant technical parameters are adjusted as follows:

[0035] (1) The width and depth of the forming gap of the bottom mold are 1.4mm and 1.2mm respectively, and the single-side punching allowance of the metal shell is 1.5mm;

[0036] (2) The width of the punch die opening is 1.8mm, and the length of the punch die opening is 7.2mm;

[0037] (3) The shape of the notch on the die opening of the punch is semicircular, the notch length is 2.4mm, and the notch depth is 1.2mm.

[0038]According to the mechanical simulation calculation, the concentrate...

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Abstract

The invention relates to a method for the transverse one-step punching formation of an inside-length convex key of a metal thin-wall workpiece. A punching head of which a punching head die opening is provided with a gap is adopted, a workpiece which needs to be punched with an inside-length convex key is transversely installed on a bottom die which is provided with a formation concave key, the punching head die opening vertically and downwards actualizes transverse one-step punching on the workpiece to form the inside-length convex key with the required size on the workpiece, large concentrated stress is respectively formed at workpiece punching end faces at both sides of the gap of the die opening at the moment of a transverse punching processing process and respectively drags and extrudes metal molecules to make a migration motion towards the position of the gap so as to form the inside-length convex key, the punching stress is decreased to the stress range of the workpiece, the phenomenon of workpiece cracking caused by stress release in a subsequent processing process is effectively avoided, the rate of finished products is high, and the loss is reduced.

Description

technical field [0001] The invention relates to a method for processing inner long convex keys of metal thin-walled workpieces with a punching die with a notch, which is suitable for punching and processing inner long convex keys of metal thin-walled circular or rectangular workpieces in use occasions such as positioning and locking. It is especially suitable for the processing of long convex keys in the housing of electrical connectors. Background technique [0002] In the case of positioning or locking, many products and parts of the product adopt the structural design of one or more convex or concave keys. When the product is assembled, the positioning or locking of the parts is realized through the cooperation of the convex or concave keys between the components. control. [0003] For the processing of metal thin-walled internal convex keys, the processing methods such as engraving and milling, plunge milling, vertical punching, and horizontal punching are generally us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/02
Inventor 叶学俊叶红雨蒋绍臣潘荣
Owner CHINA NORTH IND GRP HANGLIAN TECH CO LTD