Patent · US Expired

Method for the precision working of the flanks of gears with a gear-shaped tool coated with hard-material granules and a method for dressing such a tool

US4649671A · kind A · utility

7Cited by

3References

3Claims

0Family size

Assignee

Carl Hurth Maschinen- und Zahnradfabrik GmbH & Co. · DE

Inventors

Manfred Erhardt · Puchheim, DE
Herbert Loos · Dorfen, DE
Gerhard Reichert · Ottawa, CA

Key dates

Filing date	May 8, 1985
Grant date	Mar 17, 1987
Priority date	—
Expiry date	May 8, 2005

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB24B53/075
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A method for the manufacture or machining of the tooth system of straight or helically toothed, externally or internally toothed, nonhardened or hardened workpiece with a toothed tool, the tooth flanks of which are coated with a cubic boron nitride (CBN). The workpiece and the tool roll along with a single-flank contact and are supported by a guide-gear pair which also roll along with a single-flank contact. The contacting flanks of the workpiece-tool pair are the mating flanks for the contacting flanks of the guide-gear pair. To protect the CNB-coating, the tool is already driven at a speed which is necessary for an optimum chip removal before the tool tooth flanks start to work on the workpiece tooth flanks.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.