Stamping process of automobile roof cover and composite mold for trimming and shaping

Abstract

The invention provides a stamping forming process for an automobile roof cover. The stamping forming process comprises a drawing forming procedure and a trimming and shaping procedure in sequence; in the drawing forming procedure, a positive R corner is formed at a connecting position of the top part and the tail part of the automobile roof cover; and in the trimming and shaping procedure, the positive R corner is shaped so as to enable the positive R corner to take the shape of a step with a negative R corner. The invention further provides a trimming and shaping composite mould. With the adoption of the stamping forming process and the trimming and shaping composite mould, the risk of cracking at the connecting position of the top part and the tail part of the automobile roof cover in the stamping forming process can be reduced.

Description

technical field [0001] The invention relates to the stamping field of automobile cover parts, in particular to a stamping forming process of an automobile top cover and a trimming and shaping compound mold for the automobile top cover. Background technique [0002] The stamping process design of automobile panels is to determine the sequence of drawing, trimming, punching, flanging, shaping and other processes and the specific content of each process according to the product structure shape and technical requirements. Generally speaking, when formulating a production process plan, the fewer stamping processes, the higher the positioning accuracy of parts, and the lower the development cost of mold tooling in the early stage and the lower production cost in the later stage. However, the reduction in the number of stamping processes will inevitably increase the content of single-sequence work. Therefore, when the process plan is determined, it also puts forward higher requirem...

AI Technical Summary

Problems solved by technology

The disadvantage of this solution is that the shaping of the junction between the tail and the top is carried out in the process after drawing and trimming, which leads to an increase in the stamping work content of the subsequent mold, which easily leads to an increase in the number of mold processes, which in turn leads to an increase in tooling costs and post-production costs.

[0009] On the other hand, after drawing and forming the billet used to produce the automobile roof in the prior art scheme, the work content of peripheral trimming and punching will be carried out in the second sequence, and the roof is drawn and formed from the billet to be a Integral parts with preliminary contours can only be positioned in the second sequence by contouring the drawn part

[0010] Due to the different shapes of products, when the drawing depth is shallow or the contour shape is relatively simple, the positioning of a single surface is prone to problems such as inaccurate positioning, poor stability and poor production consistency, which will affect the final accuracy of the parts

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