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Forming method and dies using the same for backward flanging based on 90-degree web surface

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

Inactive Publication Date: 2012-01-04
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 and dies using the same for backward flanging based on 90-degree web surface
  • Forming method and dies using the same for backward flanging based on 90-degree web surface
  • Forming method and dies using the same for backward flanging based on 90-degree web surface

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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 expand the deformation area ab to cFd, and the length of the wave edge is cE+EF+FG+Gd, which is approximately equal to CA+AB+BD during design; secondly, reverse the prefabricated part through a flanging forming mold Flip to desired shape.

[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 ...

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Abstract

The invention belongs to technical field of cold stamping of plates, and provides a forming method and dies using the same for backward flanging based on a 90-degree web surface. The method comprises the following steps of: firstly, pressing an unfolded piece to be bent for 90 degrees through a special pressing wave forming die; pressing edges at two sides of the bent part into a waveform so as to store materials, and manufacturing a preformed unit; and flanging the preformed unit backwards to form a needed shape through the special flanging forming die. The material flanged by the method cannot be easily broken and has high reliability, the unfolded material is used for forming, and the utilization rate of the material is greatly improved, so that the method is an application technology with higher promotional value. The method further provides two flanging dies used in the process of flanging, and the two dies are simple in structure and convenient to operate, and can reduce cost.

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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