抄録
In fly tool cutting on a milling machine by which hobbing was simulated, a state of the thermal crack development on the rake face of cemented carbide hob material, P30, coated with TiN- and (Ti,Al)N in the cases of dry and MQL system was investigated. As a consequence, it was clarified that the thermal cracks appear at a distance of contact length with chip from cutting edge, which develop towards the cutting edge. It also became clear that the number of thermal cracks obtained with MQL system is smaller than that obtained in dry when using both TiN- and (Ti,Al)N-coated tools.
