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Anti-cracking forming method of automobile cavity-shaped internal covering piece corner part

A technology of anti-cracking and covering parts, applied in the field of drawing, which can solve problems such as uneven plane strain, uneven movement of sheet metal, and obvious wrinkles

Inactive Publication Date: 2011-04-20
SHANDONG WEIFANG FOTON MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using drawbeads to control the flow of materials, the advantage of this scheme is that the designer is relatively simple and efficient when designing the stamping process. The biggest disadvantage is that the quality control of the forming process of the part is ignored, which is determined by the structural characteristics of the product itself. During the forming process of the four corners of the inner window, the material is subjected to uneven plane strain, and the strain in two directions is greater than the rated value of its own properties, which can easily lead to tearing; the top area is due to material absorption during vertical wall forming, and the sheet material does not move. All have obvious wrinkles

Method used

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  • Anti-cracking forming method of automobile cavity-shaped internal covering piece corner part

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Embodiment 1

[0016] Such as figure 1 and figure 2 As shown, the anti-cracking forming method for the corner of the window frame of the inner panel of the automobile back door, in the forming process of the inner panel of the automobile back door, the raw material (plate-like material) of the inner panel of the automobile back door needs to be drawn to have high-end parts and low-end parts. part, that is to form a window frame shape, on the inner pressure material surface 2 of the lower end and corresponding to the corner of the window frame of the inner panel of the automobile back door, there is a convex hull shape suction for absorbing excess material Material rib 1, the convex-hull-shaped material-absorbing rib 1 protrudes upward toward the high-end direction of the inner panel window frame of the automobile back door, and the height of the convex-hull-shaped material-absorbing rib 1 is 2% to 4% of the height of the window frame .

Embodiment 2

[0018] Please refer to the attached figure 1 And attached figure 2 , although the overall shapes of the inner panel of the automobile door and the inner panel of the back door of the automobile are different, the local structures applicable to the method of the present invention are approximate. Specifically, the anti-cracking forming method for the corner of the window frame of the inner panel of the automobile door requires that the raw material (plate material) of the inner panel of the automobile back door be drawn to have high-end parts and low-end parts during the forming process of the inner panel of the automobile back door. Part of the part, that is, to form a window frame shape, on the inner pressure surface 2 of the lower end and corresponding to the corner of the window frame of the inner panel of the automobile door, there is a convex hull-shaped suction material for absorbing excess material Rib 1 , the convex-hull shaped material-absorbing rib 1 protrudes upwa...

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Abstract

The invention discloses an anti-cracking forming method of an automobile cavity-shaped internal covering piece corner part. In the method, in the process of drawing a platy material into a finished piece with a high end part and a low end part, corresponding to the cavity-shaped internal covering piece corner part, a convex hull shaped absorbing rib used for absorbing excess materials is formed on an inner swaging surface of the lower end part in a drawing mode, wherein the convex hull shaped absorbing rib can absorb the excess materials to ensure that the materials flow inside smoothly so as to solve the problem of vertical wall cracking between the high end part and the low end part of the finished piece; and the wrinkling of the high end part is obviously improved because the material absorbed by the vertical wall is reduced.

Description

technical field [0001] The invention relates to a drawing method for solving the problem of easy cracking in the forming process of an automobile cavity-shaped inner cover. Background technique [0002] During the drawing forming process of cavity-shaped parts (especially the inner panel of the back door and the window frame of the inner panel of the car door), the bottom of the four corners is easy to crack, and the top area is easy to wrinkle. [0003] The back door inner panel parts belong to the B-type parts in the automobile cover parts, which have the characteristics of complex shape, many holes, large drawing depth, and difficult to form. For the forming of the internal window, the current stamping process scheme generally implemented in the industry is: in order to reduce the forming depth during drawing molding, the flange surface of the product is directly used as the binder surface. Using drawbeads to control the flow of materials, the advantage of this scheme is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/20
Inventor 李树新张明扬刘密曹伟
Owner SHANDONG WEIFANG FOTON MOLD