抄録
Carbide hobbing have been used widely because of the manufacturing the carbide hobbing machine and improvement in manufacturing the carbide hob. Nowadays anealed gear blanks which often used in mass production can be carbide-hobbed without trouble. And in addition to that, it becomes to be possible to hob the heat treated gear blanks or hardly to be cut gear blanks which were impossible to be cut with the high speed steel hob till now. However, in the case of carbide hobbing for the heat treated gear blanks or hard-cutted, the damage of chipping or thermal crack will occur before the life (increase of flank wear) is completed because of unsuitable cutting conditions. In this paper, the authors are investigated the cause and countermeasure of damage, after classified the shape of damage on cutting blade in carbide hobbing systematically.
