液氮低温铣削Ti5553钛合金切削力及刀具磨损研究

Research on Cutting Force and Tool Wear of Ti5553 Titanium Alloy Milling with Liquid Nitrogen

采用传统切削液浇注冷却方式加工Ti5553钛合金时,存在刀具磨损快、工件表面粗糙度较高、切削液处理成本高和资源消耗大等问题。针对上述问题,通过对采用低温液氮切削加工Ti5553钛合金方法的研究,设计了低温液氮切削与冷却液浇注切削的对比试验。试验结果表明,采用液氮冷却比切削液冷却的F_(x),F_(y),F_(z)分力小,刀具寿命提升约20%。在加入MQL后,液氮冷却具有比切削液更低的工件表面粗糙度。

Traditional pouring cooling method of processing Ti5553 is subject to rapid wear of tools,higher surface roughness of workpieces,high processing cost of cutting fluid and large resource consumption.In view of the above problems,through the research of Ti5553 Ti-alloy machining by using low temperature liquid nitrogen cutting,the comparative test of low temperature liquid nitrogen cutting and cooling liquid casting cutting is designed.The results show that the components of F_(x),F_(y) and F_(z) cooled by liquid nitrogen are smaller than those cooled by cutting fluid,and the tool life is increased by about 20%.Liquid nitrogen cooling has a lower workpiece surface roughness than the cutting fluid when the MQL is added.