To remarkably improve the cutting speed without generation of heat cracks in a gear hob by performing dry cutting without using a cutting fluid at a specified cutting speed.
A work 1 is fixed on a table 11 through a fitting jig 12, a gear hob 15 is fitted to a hob head 14, and then the table 11 is rotated to rotate the work 1. A hob shaft 13 is rotated in such a manner that the peripheral speed (cutting speed) of the blade part of the hob 15 is from 120m/min to 400m/min, both inclusive. Thus, the hob 15 and the work 1 are relatively rotated to be dry-cut without using a cutting fluid, thereby creating a toothform on the work 1. Accordingly, the toothform can be created on the work 1 without the generation of heat cracks in the blade part of the hob 15 in a short time.
| JP2976091 | [Title of Invention] Machine tool chip airflow removing device |
| WO/1997/012722 | METHOD AND APPARATUS FOR WORKING METALS |
| JP2006289567 | MACHINE TOOL |
NAKAMURA YOZO
FUJITA MASAKATSU
NISHIMURA YUKIHISA
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