Punching method for preventing plate corner part in car door from wrinkling

A technology for car doors and panel corners, which is applied in the field of stamping processing of automobile panels. It can solve problems such as affecting product appearance, difficult processing in subsequent processes, and poor part size and surface shape, so as to reduce the amount of process shaping and solve product problems. wrinkled effect

Inactive Publication Date: 2010-01-27
SHANDONG WEIFANG FOTON MOLD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] 1. The size and surface shape of the parts are not good, which affects the appearance of the product
[0006] 2. Due to the change of the plate thickness structure at the wrinkles of the parts, when the parts are subjected to various loads, fatigue failure will first occur here and cause the parts to break, which will cause serious traffic accidents in driving cars, resulting in casualties and safety. Hidden danger
[0007] 3. Difficulty in processing subsequent processes
[0008] 4. The surface of the mold at the crease of the door inner panel is severely worn, which leads to premature aging of the mold and eventually failure

Method used

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  • Punching method for preventing plate corner part in car door from wrinkling

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Embodiment Construction

[0015] As shown in the drawings, in this embodiment, two left and right door inner panels 2 are stamped and formed by using one plate 1 , and surrounding drawbeads 3 are provided on the plates around the door inner panel 2 . In order to avoid wrinkling at the corners 21 of the inner panel of the car door, the method adopted in this embodiment includes: adding technological ribs to supplement the shape in the drawing process. The arc-shaped rib 4 is arranged around the corner 21 of the inner panel of the vehicle door.

[0016] Wherein, both ends of the arc-shaped rib 4 have transition ribs 41 extending from the endpoints of the arc-shaped rib 4 to the straight edge of the door inner panel, and the raised height and width of the transition rib 41 gradually become zero. The included angle between the two transition ribs 41 is not greater than the angle of the corner 21 of the inner panel of the vehicle door.

[0017] The working principle of this embodiment:

[0018] By changi...

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Abstract

The invention discloses a punching method for preventing a plate corner in a car door from wrinkling. In the method, craft rib supplement is added in modeling by a drawing procedure to completely draw out the shape of the plate corner in the car door, and only a root fillet needs to be machined in subsequent reshaping, thus reducing the reshaping load in the subsequent procedure, changing the technical problems of the existing business such as shallow drawing, a traditional great shaping process method and easy drawing but difficulty in reshaping, and effectively solving the problem of wrinkling of products which troubles the traditional process for a long time and can not be solved.

Description

technical field [0001] The invention relates to a stamping processing method of an automobile cover part. Background technique [0002] The inner panel of the car door belongs to the B-type parts of the automobile cover parts. It has the characteristics of complex shape, many holes, large drawing depth, and difficult to form, especially the problem of wrinkling at the corner of the inner door panel. There will be technical problems that are difficult to solve. [0003] The shape of the inner panel of the car door is realized by stamping, and stamping is to apply complex external force to the sheet through the mold to make the sheet flow. When the sheet metal flows, a complex stress state will appear in the sheet. For thin plates whose plate thickness is very small compared with other sizes, the thickness direction is unstable during forming. During the forming process, when the material is difficult to flow to the ideal surface (smooth surface enveloping the die) or the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/20
Inventor 李树新张建彬张明扬林明
Owner SHANDONG WEIFANG FOTON MOLD
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