面向高效低碳的机械加工工艺路线多目标优化模型

Multi-objective Machining Process Route Optimization Model for High Efficiency and Low Carbon

工艺路线规定了将毛坯变成零部件的整个加工过程,工艺路线的低碳优化直接关系到产品生产全过程及整个车间的低碳生产。为实现机械加工工艺路线的低碳优化决策,引入特征元和加工元概念表示机械零部件特征,建立以工艺路线最短总加工时间(高效)和最低总碳排放(低碳)为优化目标的机械加工工艺路线多目标优化模型。应用改进的NSGA-II(Non-dominated sorting genetic algorithm II)算法对优化模型进行寻优求解。以某机床电动机座加工过程为例验证了所建模型的有效性和实用性。

The process route rules the whole machining process from blanks to parts. It can directly affect the low carbon production of the mechanical product. To achieve the low-carbon optimization decisions of machining process route, the concept of feature element and machining element is introduced to express the component characteristics, and a multi-objective optimization model is established, which takes the minimum total processing time and the lowest total carbon emissions as the optimization objectives. Then the optimization model is solved based on NSGA-II （Non-dominated sorting genetic algorithm Ⅱ）. An experiment case of a motor seat machining process is performed to verify the feasibility and practicability of the proposed model.