窒化金型材の硬さと工具刃先形状が切削抵抗に及ぼす影響

抄録

This paper discusses the relationship between hardness of the nitride diffusion layer and the cutting characteristics of the orthogonal cutting. We verified the effectiveness of cutting resistance by using the hardness equivalent to the depth of cut and cutting edge shape. The cutting experiments were conducted using a CBN tool and the shaper machine. In the method, Piezoelectric dynamometers is adopted to the cutting forces. As a result, it was found that cutting resistance was dependent on the hardness of depth of cut. In the indentation hardness test, the nitride workpiece is hard and brittle. Produced as a brittle fracture the chip. Edge shape thrust force is increased, the compression force at the shear plane is increased. The cutting characteristics results are shown in this paper.