HOB CUTTER FOR CUTTING INVOLUTE GEAR

Title:

HOB CUTTER FOR CUTTING INVOLUTE GEAR

Document Type and Number:

WIPO Patent Application WO/1989/002330

Kind Code:

A1

Abstract:

This invention relates to a hob cutter for cutting gears and more particularly to a hob cutter or rack cutter capable of simultaneously cutting and chamferring an involute gear. The hob cutter in accordance with the present invention is a hob or rack cutter for cutting and chamferring gears wherein a pressure angle alpha1 and module M of a rack tooth shape of a rack for cutting a first involute gear are respectively different from a nominal pressure angle alphao and module m but offer a so-called transfer rack tooth shape in order to provide limit values to a number of teeth vs. chamfer quantity characteristic curve and to minimize a change in a chamfer quantity. According to the present invention, it is possible to ordinarily chamfer almost all gears from gears having a small number of teeth to gears having a large number of teeth with one kind of hob cutter.

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Inventors:

NAGATA SHIGEYOSHI (JP)

Application Number:

PCT/JP1987/000678

Publication Date:

March 23, 1989

Filing Date:

September 14, 1987

Export Citation:

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Assignee:

NAGATA SHIGEYOSHI (JP)

International Classes:

B23F21/00; B23F21/16; (IPC1-7): B23F21/16

Foreign References:

JPS51131976A	1976-11-16
JPH05616006B

Other References: