双螺旋内冷立铣刀排屑对孔加工质量的影响

Influence of Chip Removal of Double Spiral Internal Cold End Milling Cutter on Hole Machining Quality

针对高速螺旋铣孔产生的切屑滞留问题,采用CFD-DEM耦合数值模拟方法分析双螺旋内冷立铣刀的内冷孔直径、螺旋角及螺旋铣孔参数,并探讨了CFD-DEM耦合数值模拟方法应用在螺旋铣孔加工的可行性。数值模拟结果表明:良好的排屑效果可以提高孔的加工质量,较小内冷孔直径可以提高切屑颗粒的排出效率,而增大铣刀螺旋角会降低切屑的排出效率,加工时孔刀比(孔径比刀径)1.5的深孔为最优选择,研究结果可为优化双螺旋内冷立铣刀的结构参数提供参考。

Aiming at the problem of chip retention caused by high-speed spiral milling hole,the numerical simulation method of computational fluid dynamics-discrete element method is used.The internal cooling hole diameter,spiral angle and spiral milling hole parameters of double spiral internal cooling end milling cutter with 12mm tool diameter are analyzed,and the feasibility of the CFD-DEM coupling numerical simulation method to the spiral milling process is discussed.Numerical simulation results show that a good chip removal effect can improve the machining quality of the hole.A smaller inner cooling hole diameter can improve the discharge efficiency of chip particles,while increasing the spiral angle of the milling cutter can reduce the discharge efficiency of chip.A deep hole with a hole tool ratio(hole diameter ratio tool diameter)of 1.5 is the best choice.The results of the study can provide reference for optimizing the structural parameters of the double spiral inner cooling mill.