3DCS在汽车底盘尺寸与公差分析中的应用

摘要

The limitations of 1D tolerance analysis by dimensional chain and the advantages of 3D tolerance analysis were analyzed.3D dimension and tolerance analysis of the gap between air conditioning pipe of chassis and front sub-frame unit was carried out using 3DCS software.The unreasonable components that cause assembly interference were found out by comparative analysis of the main contribution factor.And then,the product structure and tolerance can be optimized,assembly process can be improved.It shows that the method can effectively carry out assembling tolerance stack-up analysis and evaluate the assemblability of product.%对一维尺寸链公差累积分析的局限性以及三维尺寸链公差累积分析的优点进行了分析.采用公差分析软件3DCS对底盘中的空调系统管道与前副车架总成之间的间隙进行3D尺寸与公差分析.通过比较分析结果中的主要贡献因子,找出引起装配干涉的不合理零/部件,进而优化产品结构和公差,改进装配工艺.实践证明该方法能有效地进行装配公差累积分析,评价可装配性.