切削工具の境界損傷に及ぼす切削抵抗の影響

ニモニック80Aの被削性(第1報)

抄録

It is well known that the tool life in machining nickel-based alloys depends mostly on the gloove wear of the cutting tool. In this paper, the influence of cutting force distributions along a side cutting edge on boundary failure in cutting Nimonic 80 A is examined and is compared with these of stainless steel (SUS 304) and carbon steel (S 45 C). To measure cutting force distributions the tool dynamometer, which has two cutting edges and can measure separately the cutting forces on these is used. Cutting forces on the boundary regions of a side cutting edge are considerably large in cutting materials that the boundary failure arises. These results are discussed by observing the surface hardness and the cutting bur. Further, this paper presents some methods on decreasing the gloove wear. The improvement of the rake face on boundary regions and the use of tool materials with high toughness are able to increase a tool life.