Method for simulating defection of surface coarsing of automotive plates

An automotive sheet and defect technology, which is applied in the field of vehicle engineering and can solve the problems of inability to obtain roughening characteristics, single deformation mode, single forming mode, etc.
CN1818606AActive Publication Date: 2006-08-16SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2006-08-16

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Abstract

A method for simulating nap defect on plate surface of automobile includes using single driving inverted presser as testing presser, using hollow based and cone shaped box mould as punching concave model, producing edge pressing plate and convex model cavity simultaneously to ensure their concentricity and to ensure they are in the same size, setting mould gap between convex model and concave model to be 1.5®L ,embedding drawing concave rib and convex rib on pressing plate and operation surface of convex mode to ensure absolute smooth of embedded binding site then carrying out nap-testing .
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Description

technical field

[0001] The invention relates to a method in the technical field of vehicle engineering, in particular to a method for simulating roughening defects on the surface of automobile sheet metal. Background technique

[0002] In cold-rolled steel sheet stamping, especially sheet deep drawing, when the sheet is in sliding motion, due to the forced contact between the sheet and the working surface of the die, adhesive wear may occur, and the formed part will be severely damaged. , that is, the surface damage of the stamping parts - the phenomenon of napping. In production, by reducing napping defects, the surface quality and yield of products can be improved. Therefore, it is very important for automakers and automotive sheet suppliers to study the phenomenon of picking and the measures to prevent it. In the stamping process of cold-rolled steel sheets, the phenomenon of napping is related to many factors: the material (composition and structure), mechanical proper...

Claims

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