关键词: 偏差源, 间隙连接件, 偏差传递路径, 多维矢量环, 机构装配

Abstract: To achieve kinematic assembly precision prediction effectively and accurately,a precision prediction method was proposed based on gap connectors and multidimensional vector loop.According to characteristics of kinematic assembly,deviation source was divided into three types: geometric location deviation,geometric form variation and assembly part location deviation.The gap connections model was set up for kinematic assembly and parts fitting position is described by the orientation angle of gap connections.Part's datum reference frame was defined,and datum path and deviation transfer path as well as assembly multidimensional vector loop and vector equations were established based on assembly constraints.The first order Taylor expansion and matrix transformation method were used to solve the assembly deviation source sensitivity and precision prediction value of kinematic assembly.The effectiveness and efficiency of the proposed method was verified by taking wing flap rocker as a research example.

Key words: deviation source, gap connectors, deviation transfer path, multidimensional vector loop, kinematic assembly