形位误差对装配精度影响的定量分析

基于形位公差带的分布特征，对形状、位置要素变动情况进行研究，提出了一种在一维线性装配尺寸链下，判断模型中形住误差是否应当纳入装配误差累积计算的方法．在统计平方根模型的基础上，依据零件生产加工完毕后各形位要素变动的分布特性，提出了一种新的装配误差累积计算模型．采用此模型可实现包含形住误差的装配精度定量分析．给出的一个应用实例说明了所提出方法的有效性．

Quantitative Analysis Method of Assembling Accuracy Analysis Including Geometric Tolerance

Most assembly tolerance stack research mainly focuses on dimension tolerance and rarely considering geo- metric tolerance. So far there is not a universally applicable analysis method which includes the influence of dimension tolerance and geometric tolerance. In linear assembly dimen- sion chain, based on the distribution features of each toler- ance＇s tolerance zone, this paper studies the change of form factors and location factors, proposes a method to determine a geometric tolerance whether it should be treated as a varia- ble element of assembly tolerance stack. Then, based on the Root Summed Squares （RSS） method, according to the dis- tribution of geometric characteristics change, this paper pro- poses a new assembly tolerance stack calculation model. This model realizes assembly tolerance stack calculation including geometric tolerance. Finally, an application example is given to illustrate the effectiveness of the proposed method.