紫铜微铣削加工刀具断裂影响因素仿真分析

Simulation Analysis on Influencing Factors of Tool Break in Copper Micro-Milling

工艺参数的不合理设置是影响微铣削加工刀具断裂的重要原因。首先建立了微铣削加工仿真分析的理论模型和几何模型,然后基于正交仿真方法,研究铣削深度、刀具转速、进给速度等三个主要工艺参数对刀具断裂的影响。仿真分析结果表明:用?0.15mm铣刀铣削紫铜时,当工艺参数设置合理时,随着加工时间增加,应力变化幅度减小,铣削过程趋于稳定,刀具断裂可能性较小;在给定的仿真参数设置范围内,铣削深度、刀具转速、进给速度等三个主要铣削参数中铣削深度对刀具断裂影响最大,其次是铣刀转速,最后是进给速度。

Unreasonable setting of process parameters is an important reason to affect the fracture of micro milling tools. In this paper, the theoretical model and geometric model of simulation analysis of micro-milling machining are first established and then based on the orthogonal simulation test method, the influence of three main process parameters, such as milling depth, tool speed and feed speed, on tool fracture is studied. Simulation results show that when copper is milled with ?0. 15mm milling cutter, when the process parameters are set reasonably, the amplitude of stress change decreases with the increase of machining time, the milling process tends to be stable, and the possibility of tool fracture is small;the milling depth and tool speed within a given range of simulation test parameters are set.Among the three main milling parameters, such as feed speed, milling depth has the greatest influence on tool fracture, followed by milling tool speed, and finally, feed speed.