关键词: Mule 车；零部件改制；焊接精度；双内衬改制；功能尺寸；改制失效

Abstract: In order to speed up the development process of new products, in the early stage of new product development, relevant design scheme verification is generally achieved by making Mule cars. At this time, because the parts are still in the data design stage, in order to achieve the verification of relevant design scheme, relevant parts should be adapted to meet the requirements of Mule car assembly. The precision and strength of Mule vehicle components directly affect the effectiveness of product design validation. Mule car parts restructuring strength and precision are mainly determined by structure, material, process, tooling and other factors. This paper mainly studies the restructuring process, scheme design, structure, technology and tooling of Mule car parts to ensure its precision and strength, so as to realize the verification of relevant design schemes.

Key words: Mule car; Parts restructuring; Welding precision; Double lined trial; Function of size; Trial failure