STUDY ON TOOL WEAR MONITORING METHOD FOR HIGH SPEED MACHINING

本文介绍了一种响应速度快、分辨率高的切削力测量系统。它可以监测硬质钢材料高速铣削时的切削过程和刀具磨损情况。该系统能够精确地确定立铣刀的每个切削刃以40000 rpm的速度旋转所产生的瞬态切削力作用。研究发现，切削参数和刀具磨损过程对高速铣削时的切削力及其波形有较为敏感的影响。切削力随切削速度和切削长度成比例增大。当切削速度超过一定速度时，切削刃迅速磨损，切削力的增加速度也迅速变化。当螺旋角为45°时，各切削刃产生的切削力和侧面磨损比螺旋角为15°和30°时小。

This paper describes a newly developed cutting force measuring system with high response speed and fine resolution. It can monitor cutting process as well as tool wear during high speed emdmiling of hard steel materials. The system enables to precisely determine an transient cutting force action which is generated by each cutting edge of endmill tool rotated at a speed of 40,000 rpm.It is found that the cutting force and its waveform in high speed milling are affected quite sensitively by the cutting parameters and tool wearing process. The cutting force are proportionally increased with a cutting speed and cutting length. When the cutting speed surpasses a certain speed, the cutting edges rapidly wear out, also the increasing rate of cutting force changes quickly. When the helix angle is 45 deg., the cutting force and the flank wear of each cutting edge is generated smoller than those for the angle of 15 deg.and 30deg..