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Forming method for reverse flanging based on 90-degree web plate surface and used mould thereof

A technology of reverse flanging and web surface, applied in the field of cold stamping, can solve the problems that will affect the strength of parts, material waste, and many processes, and achieve the effects of simple structure, reduced production cost, and high reliability

Active Publication Date: 2012-04-25
ZHEJIANG HUANGYAN DIE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Method 1 will affect the strength of the part and requires the approval of product design accounting; Method 2 involves many processes and serious waste of materials. When the radius of the bending fillet of the web surface is small, it is also difficult to draw deep, and the quality is also poor.

Method used

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  • Forming method for reverse flanging based on 90-degree web plate surface and used mould thereof
  • Forming method for reverse flanging based on 90-degree web plate surface and used mould thereof
  • Forming method for reverse flanging based on 90-degree web plate surface and used mould thereof

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Embodiment Construction

[0021] Based on the forming method of reverse flanging on the 90° web surface, firstly, the deformation area to be flanged of the unfolded part is enlarged through a wave-pressing mold, and the edge of the expanded deformation area is pressed into a wave shape for Storage material, made into prefabricated parts (such as Figure 6 ) shown. Such as figure 1 and figure 2 As shown, first the deformation region Extended to cFd, the wave edge length is cE+EF+FG+Gd, which is approximately equal to Secondly, the prefabricated part is reversely flanged into the desired shape through a flanging forming mold.

[0022] Such as image 3 and Figure 4 As shown, the wave-pressing mold includes an upper template 1 and a lower template 9, a punch fixing plate 2 is installed below the upper template, and a punch 3 is installed on the lower part of the punch fixing plate; a die holder 8 is installed above the lower template, and A concave mold 7 that matches the shape of the punch is i...

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Abstract

The invention belongs to the technical field of plate cold stamping, and provides a forming method for reverse flanging based on a 90-degree web plate surface and a used mould thereof. The method comprises the following steps of: firstly, bending a stretched member into a 90-degree shape through a special wave pressing forming mould; pressing edges on the two sides of the bent part to be wavelike for storing a material to manufacture a prefabricated member; and then, reversely flanging the prefabricated member into a required shape through the special flanging forming mould. By applying the method, the flanging material has low probability of breakage and high reliability, is formed by using the stretched material, and is an application technology with extremely high generalization value, and the utilization rate of the material is greatly increased. The invention also provides two sets of flanging moulds applied to flanging; and the two sets of moulds have simple structures, and are convenient to operate, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of cold stamping, specifically, it provides a forming method for performing reverse flanging on a 90° web surface; the invention also provides a mold used in the reverse flanging forming method, specifically Shiatsu wave forming mold and flanging forming mold. Background technique [0002] Reverse flanging on the 90° web surface is the same as convex web flanging in nature, and it belongs to elongation deformation. The degree of deformation is limited by the elongation of the material. When the allowable extension of the material is exceeded, it will first crack at the edge opening. There are two usual solutions; one is to partially reduce the height of the corner flanging and apply for a design change; the other is to change the flanging forming to drawing forming, and first draw it shape, then trimming, and then flanging. Method 1 will affect the strength of the part and requires product design calcula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D21/00B21D13/02B21D19/12B21D37/10
Inventor 张懃
Owner ZHEJIANG HUANGYAN DIE CO LTD
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