Abstract: Aiming at the problem of low processing efficiency caused by unreasonable process route compilation of a complex shaft, starting from the existing process route optimization scheme, the processing characteristics were divided in detail with the processing accuracy as the processing element node,and a reasonable processing element coding was constructed. Based on the actual clamping in production,the process constraint relationship was grouped and analyzed to obtain a better constraint matrix expression.Differential evolution algorithm was used to reasonably design differential mutation,crossover,sequence validity check and adjustment algorithm with the minimum replacement of machine tools,cutting tools and clamping as objective function.The comparison shows that the optimization scheme has reduced the number of tool and clamping replacements compared with the pre-optimization scheme and the process constraint non-grouping scheme.

Key words: shaft parts, processing characteristics, constraint matrix, differential evolution algorithm, process route