关键词: 铣—车复合加工, 工艺优化, 工步优先关系矩阵, 遗传算法, 航空发动机

Abstract: During the milling-turning process, the rotation of the workpiece and tool changes directly influenced machining quality and efficiency. By analyzing the operation sequences of the part and determining reasonable auxiliary time, an optimization model for optimal operation sequences was established with the objective function of shortest auxiliary time. By using the self-adaptive genetic algorithm, the global optimum decision of the process planning was completed, as well as the optimal operation sequences and the shortest auxiliary time were obtained respectively. During the optimization process, the operation precedence matrix was firstly defined and then it was used to check and adjust the operation sequences to meet the process constraints. It was revealed that the operation sequences optimization reduced the auxiliary time, and improved the production efficiency and machining quality.

Key words: milling-turning machining, process optimization, operation precedence matrix, genetic algorithms