Patent · US Expired

Method for manufacturing internally geared parts

US6026666A · kind A · utility

18Cited by

3References

14Claims

0Family size

Assignee

Dynamit Nobel GmbH · DE

Inventors

Willi Zimmermann · Sankt Augustin, DE
Bernd Stein · San Diego, US
Jurgen Zimmermann · Salzgitter, DE

Key dates

Filing date	Nov 17, 1997
Grant date	Feb 22, 2000
Priority date	—
Expiry date	Nov 17, 2017

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB21H7/187
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A flow-turning process for manufacturing internally geared parts, including a press mandrel (10) comprising a mandrel (1) on which is fitted a forming tool (2) and one or more pressure rollers (3). A workpiece (4) is held between the forming tool (2) or press mandrel (10) and press rollers (3) and undergoes plastic deformation under the force exerted by the press rollers (3). The forming tool comprises chromium- and molybdenum-containing materials and is tempered and surface-hardened, and the distance between the forming tool (2) and the mounting of the press mandrel (10) in the machine is sufficient to permit a degree of deviation (.alpha.) by the forming tool (2) relative to the machine axis (5).

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