关键词: 装配顺序, 装配规划, 逐步求解, 混合编码, 模糊评判

Abstract: Aiming at the feature of product assembly,a step by step judging method for assembly sequence planning was proposed.Assembly constrain code matrix was presented to represent geometry constrain and assembly semantic constrain with hybrid coding.Based on the hybrid coding matrix,assembly constrains reasoning was used to identify all feasibly assembly plans of each step in assembly process as assembly sequence evaluation set.By taking the assembly direction change,the assembly tool change,the assembly stability and the assembly accuracy as the factor set of assembly plan,the multi-factor fuzzy comprehensive evaluation method was used to obtain the optical assembly plan for the parts being assembled.The solution space was gradually narrowed until the assembly sequences of all parts were obtained.The proposed method was applied to the assembly planning of a cabin door frame,and the result showed that the method was validated and could meet the engineer requirements.

Key words: assembly sequence, assembly planning, step by step solution, hybrid coding, fuzzy evaluation