切りくず処理に関する研究

チップブレーカの最適化

抄録

Chips break excessively in cutting by using the tool with a narrow chip breaker. Consequently, tool edge is destroyed because cutting forces increase. For the purpose of avoiding this trouble, the optimum chip breaker dimensions are important. The chip curls even in cutting with a tool without a chip breaker, which is called natural curl. In this paper, the natural upward curl radius is measured in cutting with a special geometry tool. It is clear that the natural upward curl radius is influenced chiefly by the chip width and the chip flow angle. If the calculated curl radius is remarkably smaller than the natural curl radius, it follows that chips break excessively. That is confirmed from the curl radius and the cutting forces in cutting by using a throwaway tip with a groove type chip breaker.