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Die regulating method for preventing crack in punched large covering vehicle body part

An adjustment method and large-scale technology, applied in the field of mold manufacturing, which can solve the problems of mold scrap, drawing cracking, economic loss, etc.

Inactive Publication Date: 2002-09-25
DONGFENG PEUGEOT CITROEN AUTOMOBILE
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Stamping and drawing cracking of large car body covering parts is the biggest problem in the stamping field, especially when the stamping die has been manufactured and the problem of drawing cracking occurs during the drawing die debugging stage, it is more difficult to solve, and sometimes it may even cause mold damage. All scrapped, causing huge economic losses

Method used

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  • Die regulating method for preventing crack in punched large covering vehicle body part
  • Die regulating method for preventing crack in punched large covering vehicle body part
  • Die regulating method for preventing crack in punched large covering vehicle body part

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Embodiment Construction

[0021] According to the mold manufacturing technology of the present invention, at first the convex hull on the OP20 drawing die is tested. Utilizing the perfect technology of foreign die manufacturers, a polyester compound material is used to modify the convex hull, and the height of the left convex hull is increased from 50mm to 60mm. Through the test punching, the test was successful once, and the drawn part was changed from a 50mm high convex hull to a 60mm high convex hull without cracking. At that time, the method of manual trimming was used to complete the OP60 shaping process. As a result, the final parts that did not crack and did not need to be opened were pressed out, and the problem of shaping and tearing was also solved (see Figure 10 ). The mold manufacturing technology of the present invention has been verified here, and is indeed feasible.

[0022] According to the four technologies of the mold manufacturing technology of the present invention, foreign die m...

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Abstract

The die altering method includes increasing the drawing boss depth and rotating diameter of drawing die, increasing technological platform in edge trimming and hole punching die and changing the shape of chopping die. Being capable of preventing crack in punched large covering vehicle body part, the present invention is suitable for vehicle part punching works and die fabricating works.

Description

technical field [0001] The invention belongs to the mold manufacturing technology for solving stamping and stretching cracking of a large body cover part, and specifically relates to the mold manufacturing technology for a back door inner panel of a car. Background technique [0002] The inner panel of the back door was originally a product made of composite materials, and the production technology is relatively mature. But now after it is changed to sheet metal stamping parts, there is no production in China at present. Although the product design has made a lot of changes, it is suitable for the production of stamping process. However, the technical difficulty of stamping die manufacturing is still the most difficult part. Due to the limitation of the definition of prototype parts in the design of the back door inner panel, there are 4 technical difficulties in the stamping die manufacturing (see figure 1 ). [0003] In the die manufacturing p...

Claims

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Application Information

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IPC IPC(8): B21D37/10
Inventor 曹琴生
Owner DONGFENG PEUGEOT CITROEN AUTOMOBILE
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