歯切りにおける切削力に関する基礎的研究 : 連なった二つの対称な切れ刃による切削理論

抄録

In hobbing the cutter has many cutting teeth. Each hob tooth has two or three cutting edges. When a hob cuts a gear, each chip is simultaneously produced with two or three cutting edges of one tooth. Then the interference occurs among the parts produced by those butting edges, and the specific cutting forces become larger than those in orthogonal cutting. In this paper, the interference of chips is theoretically investigated. The simplest model of the interference of chips is the cutting of full-depth or non-full-depth triangular cuts. So the specific cutting forces in non-full-depth triangular cuts with a point nose straight tool are theoretically investigated with various included angles. The result shows that the specific cutting forces become large when the included angle is small. The specific cutting forces with an included angle of 90 degrees are about 1.3∼1.35 times as large as those with a flat tool.