微坑织构车刀正交切削钛合金试验的研究

Study on Orthogonal Cutting Titanium Alloy Test of Micro-pit Texture Tool

基于仿生摩擦学理论,在刀具表面上制备微织构可以有效提高刀具耐摩擦磨损性能和延长刀具寿命。利用激光加工技术,通过控制加工过程中的激光密度、打标次数、打标速度,在硬质合金刀具的前刀面上制备出直径为35μm、30μm、25μm、20μm的微坑阵列。正交切削试验对比微坑织构刀具和无织构刀具的耐磨损性能,从刀具磨损的长度、宽度、工件表面质量、钛合金的黏刀量等方面进行评价。研究结果表明:表面微坑织构可以有效提高刀具的耐摩擦磨损性能和钛合金表面质量;随着微坑直径的不断减小,刀具的耐摩擦磨损性能不断提高,存储切屑和硬质合金颗粒的能力也不断提高,减少对刀具前刀面的犁沟作用。

Based on the theory of bionic tribology,the micro-texture processing on tool surface can effectively improve the tool＇s wear resistance,and prolong tool life. The micro-pitsarray with diameter of 35μm,30μm,25μm and 20μm are prepared on the rake face of cemented carbide tool by controlling the laser power,marking times and marking speed in the processing by laser processing technology. The wear resistance of micro-pit tool and the untexture tool are compared through orthogonal cutting test,the tool wear length,width,workpiece surface roughness,and amount of cutter sticking. The results show that micro-pit texture on the surface can effectively improve the tool＇s wear resistance and titanium alloy surface quality. With the decreasing of micro-pit diameter,tool＇s friction and wear performance are continually improved. The capacity to store chips and hard alloy particles is enhanced. As a result,the tool＇s rag face furrow is reduced.