1.绪言汽车车身及其有关零件所使用的材料种类是各式各样的。在汽车工业中,不论是大型车或小型车都有提高性能、提高可靠性、安全性、公害问题,降低成本、节省劳力等许多问题需要解决。为此目的,人们对这些材料的性能在生产技术范围内进行着广泛的研究。在节省劳力中,运输机械化最关重要。工业用自动装置最近已经出现、例如连续气体渗 1. INTRODUCTION The types of materials used in automobile bodies and their related parts are varied. In the automobile industry, many problems such as large cars or small cars have problems of improving performance, improving reliability, safety, pollution problems, reducing costs and saving labor. To this end, extensive research has been conducted on the properties of these materials within the production technology. In labor-saving, transport mechanization is the most important. Industrial robots have recently emerged, such as continuous gas permeation