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Drawing work supplement method and drawing mould

A technology for drawing dies and process supplements, applied in the field of drawing dies, can solve problems such as cracked parts rigidity, parts wrinkle, lack, etc., to achieve the effects of increasing deformation, eliminating wrinkles, and suppressing unevenness

Inactive Publication Date: 2009-01-07
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Therefore, an object of the present invention is to provide a method for supplementing the drawing process, by which the above-mentioned problems can be solved, such as excessive deformation of high-end materials resulting in cracks and insufficient deformation of low-end materials resulting in lack of rigidity of the workpiece, high-end and low-end The transition part is partially wrinkled due to uneven deformation of the material

Method used

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  • Drawing work supplement method and drawing mould
  • Drawing work supplement method and drawing mould
  • Drawing work supplement method and drawing mould

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Embodiment Construction

[0018] The principle of the present invention will be described below based on some examples.

[0019] Such as figure 1 and figure 2 As shown, for drawn parts with complex shapes such as automobile rear side panels, not only the drawing shape is irregular, but the drawing height is generally not equal. Some parts are drawn to a high height, as shown in Part A (for convenience, this article is called "high-end material"); some parts are drawn to a relatively low height, as shown in Parts B and C (this referred to as "low-end material"). and, if figure 2 As shown, the height between the high-end material and the low-end material is sometimes not equal, for example, the height between the A part and the B part and the height between the A part and the C part are not equal. In addition, the heights of the high-end materials themselves may be unequal, or the slopes or inclinations of the edges of the high-end materials may also be unequal, such as 90 degrees or 60 degrees, an...

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Abstract

It relates to a extension workmanship supplementary method, stretching plate material into low end and high end materials with at least one rib being extended on the circumference of the low end material. It also provides a extension mold, with convex and concave mold are of the same shape with high end and low end and at least one boss at the surrounding area of the low end. In this way, it can supplement extension for low end material, strengthening deformation rigidity of it, eliminating partial wrinkling of the parts, reducing flowing resistance, increasing material's flow into high end material of the supplement piece to reduce the stress deformation of the material to eliminate breach.

Description

technical field [0001] The invention relates to a drawing process supplementary method in the stamping process and a drawing die produced by the method. Background technique [0002] Drawing (also known as deep drawing or calendering) is a method of stamping a sheet blank into an open hollow part by using a drawing die. There are many kinds of parts made by drawing, which can usually be classified into three categories: 1. Rotary parts, such as enamel pots, automobile lamp housings, etc.; 2. Box-shaped parts, such as tractor tool boxes, automobile fuel tanks, etc.; 3. , Complex shapes, such as automotive panels such as automotive doors. [0003] The mold used for drawing is mainly composed of three parts: punch, die and blank holder. During drawing, the sheet blank is subjected to the force generated by the punch, die and blankholder, and the punch makes the sheet enter the cavity of the die and draws the sheet into a predetermined shape. The function of the blank holder ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/20B21D37/10
Inventor 黄河
Owner BYD CO LTD
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