Gear shaper working method and gear shaper

TLDR: In this paper, a pinion cutter 4 is coated with a film of composition (TiL(1-x) Alx ) (Ny C(1y) ) (0.2<=x<=0.9, 0.2 <=y<=1.0).

Abstract: PROBLEM TO BE SOLVED: To remarkably improve cutting speed by coating a film of specific composition on the flank of a gear shaping tool, and working under a specific speed without using cutting fluid. SOLUTION: A pinion cutter 4 is coated with a film of composition (TiL(1-x) Alx ) (Ny C(1-y) ) (0.2<=x<=0.9, 0.2<=y<=1.0). Coating of the film is executed at least on the flank of the pinion cutter 4. In a gear shaper, generation of tooth profile is executed by reciprocating the pinion cutter 4 up and down to cut in a work 1, and giving relative rotational motion to the work 1 against the pinion cutter 4. Cutting is executed by dry cut without supplying cutting fluid. An abrasion loss increases as the cutting speed becomes higher, and hence the cutting speed is set to be under 300 m/min. Hereby, the cutting speed can be remarkably improved without using an expensive tool.