Abstract: To reduce the energy consumption of CNC machine tools,the optimization method of tool combination selection was presented towards NC milling process of 2.5D pocket.The influence of tool combination in terms of tool diameter selection and the accessible region determination on energy consumption of 25D pocket NC milling process was explicitly analyzed.A mathematical optimization model was established to select the best tool combination with objective of minimizing both energy consumption and machining cost of 2.5D pocket NC milling.A hybrid approach with integration of directed graph and Dijkstra algorithm was proposed to obtain the optimal tool combination.The proposed approach was demonstrated through tools selection of 2.5D pocket NC milling process and was verified to be efficient and effective.

Key words: NC milling, tool combination selection, energy consumption, 2.5D pocket

摘要： 为降低数控机床的能量消耗,深入研究了2.5D型腔数控铣削加工过程中的刀具组合优选问题。系统地分析了刀具组合与2.5D型腔数控铣削加工过程能耗的映射关系,揭示了刀具直径和刀具可行域对加工能耗的影响,并构建了多刀具数控铣削加工能耗函数。建立了以可行刀具为优化变量、以能耗和成本为优化目标的数控铣削加工刀具组合多目标优化模型,提出一种基于有向图和Dijkstra算法的刀具组合优化求解方法。以某2.5D型腔数控铣削加工刀具组合优选为例开展实验,验证了所提模型与方法的有效性和实用性。

关键词: 数控铣削加工, 刀具组合优选, 加工能耗, 2.5D型腔