セラミックカッタの熱損傷 (第3報)

熱損傷と工具摩耗の関係

抄録

According to the experimental results, it is evident that ceramic face milling cutter do not receive a fatal damage as a complete fracture by the thermal cracks which produce in the cutter, but tool wear of the cutter is promoted by these thermal cracks.
Comparing the tool wear in continuous cutting (turnning) with in intermittent cutting (face milling), the latter is remarkble. And, it is found in some microscopic observations on the wear surface of the cutter that the increasing wear affect with falls of many alumina grains from the tool surface. The more cutting condition in the intermittent cutting is severe, the more falls of the grains are remarkble, and also characteristics of the wear approch to it in the continuous cutting when the cutting condition is light.