Patent ID: 8460064
Filing Date: 2013-06-11
Classification: B23F,B24B,Y10T

Abstract:
1. A method of dressing a barrel worm-shaped tool to carry out the dressing of a barrel worm-shaped tool formed to grind an internal gear and having its diameter gradually increasing from the two end portions in the axial direction thereof towards the middle portion thereof, the dressing being carried out by making a disc-shaped disc dresser mesh with the barrel worm-shaped tool, wherein the barrel worm-shaped tool is made to rotate around a tool-rotating shaft disposed at a predetermined shafts-crossing angle with respect to a vertical work-rotating shaft for the internal gear, the disc dresser is made to rotate around a dresser-rotating shaft, the disc dresser being disposed at an angle that is equal to a helix angle of the internal gear, and the barrel worm-shaped tool and the disc dresser which mesh with each other and both of which are rotating are made to revolve relative to each other within a horizontal plane.