柔性薄壁件装配公差的分析

产品设计过程中需要根据零件公差计尊其装配公差，但是传统的方法均假定零件在装配过程中不发生变形。针对金属薄壁件刚性小，易变形等特点，利用根据数论方法产生的伪随机点对薄壁件的装配公差进行有限元计算。计算结果表明：该方法的计算量远小于Monte Carlo法。并利用正交实验分析方法分析了零件公差对装配误差的影响。

The analysis of assembly variation for deformable sheet metal

Assembly variation must be calculated in the process of product design based on part tolerance, and it is assumed that the part is rigid in the process of assembly. In this paper, for accounting the effect of low stffness of sheet metals, the assembly variation is calculated using finite element method and pseudo random numbers which are produced based on number theoretidc method. This method can account for the effect of elastic and plastic deformable. Consequently, ti is indicated that the presented method is simple and practical as the Monte Carlo method, and the calculation amount can be deceased remarkably. In the meantime, the influence to assembly variation imposed by part tolerance was analyzed based on experiment design.