Method of making barrel-shaped worm-like tool

摘要

Provided is a method of making a barrel-shaped worm-like tool whereby a barrel-shaped worm-like tool capable of efficiently performing grinding without unequal wear can easily be made. The aforementioned method comprises making the barrel-shaped worm-like tool (12) by using a dressing gear (11) to dress the barrel-shaped worm-like tool (12), which is used for machining an internal gear and has a diameter that gradually increases from the ends (12b, 12c) to the center (12a) in the axial direction. On the basis of data wherein the number of teeth is less than that of the internal gear to be machined, the dressing gear (11) and the barrel-shaped worm-like tool (12) are engaged with each other at the same axial intersection angle as during gear-machining performed by the barrel-shaped worm-like tool (12).

主权项

1. A method of dressing a barrel-shaped worm tool that uses a dressing tool to dress the barrel-shaped worm tool, the barrel-shaped worm tool is used for gear-machining an internal gear to be machined by the barrel-shaped worm tool and has a diameter gradually increasing from ends in an axial direction to a center in the axial direction of the barrel-shaped worm tool, the dressing tool is an internally toothed dressing gear having a smaller number of teeth than the number of the teeth of the internal gear to be machined, the method comprising:
providing the internally toothed dressing gear having the smaller number of teeth than the number of teeth in specification data for the internal gear to be machined; engaging the provided internally toothed dressing gear and the barrel-shaped worm tool with each other at the same axis intersection angle as during gear-machining to be performed by the barrel-shaped worm tool; and dressing the barrel-shaped worm tool using the internally toothed dressing gear.