YG8硬质合金微织构刀片的切削性能研究

Cutting Performance of YG8 Micro-textured Cutter

通过摩擦磨损试验初定表面微织构参数,在此基础上制备了沟槽型微织构,并对TC4钛合金进行了正交切削试验,优化了微织构参数,研究了微织构深度、宽度与间距在有切削液润滑下对YG8刀具切削性能的影响。试验结果表明:表面微织构对于切削力影响不大,但可明显减小进给抗力,因而降低摩擦因数,改善刀屑间的摩擦状况,减缓刀片表面磨损。最多可降低19. 20%的摩擦因数并降低31. 8%的后刀面磨损。后刀面加工表面微织构会降低刀刃附近强度,造成更大的磨损。

The surface micro-textile parameters were optimized by friction and wear tests. On this basis,grooved micro-textures on rake face of cutters were prepared. Then,the influences of micro-texture depth,width and surface occupancy on the machinability of YG8 cutters were analyzed on the orthogonal cutting test under the lubrication condition. The results show: micro-textures are not effect obviously on the reduction of cutting force,but a great improvement on the friction between cutting chips,which means 31. 8% reduction of wear and 19. 20% reduction of friction. However,for the short of strength,the cutter with micro-texture on its flank face has worse wear.