变密度微织构球头铣刀切削性能多目标优化

Multi-objective Optimization of Cutting Performance of Variable Density Micro-texture Ball-end Milling Tool

为深入研究微织构排列形式对微织构理刀具的抗磨减摩机理的影响,分别从理论、仿真及试验等方面对最优的微织构排布形式进行研究。首先,建立微织构在刀具前刀面的数学模型及仿真模型。其次,通过试验验证仿真结果的准确性。仿真及试验研究均发现,变密度微织构球头铣刀的铣削性能优于均匀分布密度的微织构球头铣刀。最后,运用模糊评价法优选最优的铣削性能的微织构球头铣刀,优化结果表明,两排织构间距先为200μm,再为150μm,最后为175μm的微织构球头铣刀的铣削性能最好。该项研究使刀具具有良好的抗磨减磨性,提高加工效率及被加工工件的表面质量。

In order to study the effect of micro-texture arrangement on the wear resistance and friction reduction mechanism of micro-textured cutting tools, the optimal micro-texture arrangement is studied theoretically, simulated and experimentally. First, the mathematical model and simulation model of micro texture on tool rake face are established. Secondly, the accuracy of the simulation results is verified by experiments. Both simulation and experiment results show that the milling performance of variable density micro-texture ball-end milling cutter is better than that of uniformly distributed density micro-texture ball-end milling cutter. Finally, the fuzzy evaluation method is used to optimize the milling performance of the micro-texture ball-end milling tools. The results show that The milling performance of the micro-textured ball-end milling cutter with the spacing of 200 μm, 150 μm and 175 μm is the best. This research makes the cutter have good wear resistance and abrasion reduction, and improves the machining efficiency and the surface quality of the workpiece.