汽车覆盖件冲压中的面形状精度不良及其分类

Poor Surface Fineness and Its Classification of Motor Vehicle Body Cover Panel Pressings

在板材冲压成型技术中，以前的主要研究课题是破裂和起皱问题。随着高强度薄钢板在汽车覆盖件上的大量应用，面形状精度不良问题越来越多，严重影响车身（特别是轿车）质量。因此，面形状精度不良问题已成为现代冲压成型技术的一大重要研究课题，目前人们对它的认识还要进一步深化。对其进行准确的分类，有助于深入探讨其发生机理和采取对策。

Main topics investigated formerly in sheet metal press forming technology are breakage and crease. After massive application of high strength thin steel sheet in motor vehicle body cover panel pressings,more and more problems of poor surface fineness arise,which seriously effect body quality of motor vehicles,especially cars. There fore,poor surface fineness becomes an important topic of current press forming technology to be investigated,which demands people to deepen their recognition. Accurate classification of the matter may help to make clear the causes and to take counter measures.