关键词: 装配, 变形误差, 信息模型, 误差传递, 产品设计

Abstract: A method of calculating assembly deformation error was proposed for assembly error caused by part deformation.The part feature surfaces were represented by discrete points,the relation between the part deformation and part error was built by the analysis on the deviation of discrete points caused by part machining and part deformation,so as to further study the effect of part deformation on assembly deformation error.The assembly information model was constructed to represent the relation between the propagation of part deformation error and the information needed.The assembly deviation propagation was analyzed by considering the error features of part machining and part deformation,thus the calculation of assembly error was achieved.The assembly error calculation method was verified by a given example.

Key words: assembly, deformation error, information model, error propagation, product design