Stamping processing method for related joint of vehicle side-frame outer plate and roof board

Abstract

The invention discloses a punching treating method for a lapping position between a side-frame outer panel and a head cover of an automobile, comprising the manufacturing of a die face during the drawing of the side-frame outer panel, the lateral trimming on the die face and the lateral shaping on the die face. In the manufacturing of the drawing die face, a step is designed on an addendum surface at the outside of a trimming line of the die face at first. In the formation of the step, the boundary of side A of the side-frame outer panel extends outwards along the tangency direction with the side A firstly; the length is less than or equal to 10nm; the addendum surface is manufactured at the direction which forms a 3-20 degree angle with the punching direction; the step is formed at 3-20nm away from the trimming line on the addendum surface. The boundary of the side A of the side-frame outer panel refers to an intersecting part between the side A of the side-frame outer panel and a flange of the side-frame outer panel. The side A refers to the appearance surface of an external surface part. With the method provided by the invention adopted, the deformation of the side A at the lapping position between the side-frame outer panel and the head cover can be prevented. The product quality can be ensured. Influences of a primary impact line and a secondary impact line can be eliminated. Meanwhile, the most reasonable material utilization can be achieved.

Description

technical field [0001] The invention belongs to the field of automobile body-in-white sheet metal parts manufacturing, in particular to stamping manufacturing and sheet metal forming analysis of automobile body-in-white sheet metal parts. Background technique [0002] At present, with the continuous progress of the automobile industry, the requirements for the appearance quality and material utilization rate of automobile outer covering parts are getting higher and higher, which requires designers to continuously improve the design and manufacturing process level. In the field of automotive body-in-white sheet metal parts, the side wall outer panel is the core of the body-in-white parts manufacturing. It has the characteristics of complex shape, large structural size, difficult forming, and high quality requirements for the outer surface. In order to achieve the best appearance quality and the highest utilization rate of steel materials, the important parts of the parts (see...

AI Technical Summary

Problems solved by technology

This kind of process design has no major problems in the initial production stage, but when it is mass-produced, the rounded corners of the die are severely worn, the resistance of the material flow is reduced, and the material inflow is relatively large, which results in insufficient drawing of the A side of the product. The quality of the welded surface after flanging is also difficult to guarantee, and defects such as wrinkling and overlapping are prone to occur

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