抄録
The tooth surface roughness of hardened and tempered gears has a considerable effect on their surface durability, because the effect of "running-in " is hardly expected. It is very advantageous in terms of economy and productivity that the tooth surfaces of hardened and tempered gears are finished smoothly by hobbing. In this report, a finishing hob with cemented carbide tips is developed, and the roughness and scratch of the tooth surface of the hardened and tempered gears finished with the carbide tipped hob are investigated in detail. Moreover, cemented carbide tips (including cermet, tips) for the finishing hob are selected by the intermittent cutting test of turning and by the fly-tool test on the milling machine. Finally, an improvement of the surface roughness with the finishing carbide hob is discussed.
