轿车白车身装配过程的一种模型表达方法

提出一种称为“TRAS”模型的轿车白车身装配过程表达模型，通过车身装配树表达工艺过程，通过零件和总成件装配矩阵表达车身结构和装配关系，并通过基准点、定位点、装配点、检测点等及其他要素特征点及其特征矩阵，来描述装配特征和装配尺寸传递关系。该模型为进一步开展定量偏差分析奠定了数据表达基础，可应用于白车身CMM测量数据分析和尺寸偏差诊断。

Modeling of Automotive Body Assembly Process for Dimensional Quality Control

This paper attempts to develop a new Body in White modeling approach to express automotive body assembly process. In this method, the auto body structure and manufacturing process are described by assemble tree, and the relationship between different parts or components is represented by assembly matrix. In order to expressing the dimensional relationship of BIW, some key measurement points are chosen, and several types of these points, such as datum mark point, locating point, matting point, and witness point, etc. are defined. By this approach, the auto body assembly process is expressed mathematically. The method can be used in CMM measurement data analysis and fault diagnosis for auto body dimensional quality control.