T. Suzuki et al., BASIC STUDY ON CUTTING FORCES IN GEAR CUTTING (THEORY OF CUTTING WITH2 CONTINUOUS SYMMETRICAL CUTTING EDGES), JSME international journal. Series C, dynamics, control, robotics, design and manufacturing, 36(4), 1993, pp. 543-548
In hobbing, the hob cutter has many cutting teeth, and moreover each h
ob tooth has three cutting edges. When a hob cuts a gear, each of the
cutting edges of one tooth produces one chip simultaneously. Then the
chips resulting from those cutting edges interfere with further cuttin
g, and the specific cutting forces become larger than those in orthogo
nal cutting. In this paper, the interference of chips is theoretically
investigated. A basic and simple model of chip interference is the cu
tting of full-depth or non-full-depth triangular cuts. Thus, the speci
fic cutting forces in non-full-depth triangular cuts made with a point
nose straight tool are theoretically investigated in terms of various
included angles. The result shows that the specific cutting forces be
come large when the included angle of the tool is small. The specific
cutting forces with an included angle of 90 degrees are about 1.3 appr
oximately 1.35 times those produced by a flat tool.