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Patent Searching and Data


Title:
METHOD FOR PRODUCING STEEL ROLLING BEARING RINGS
Document Type and Number:
WIPO Patent Application WO1999007495
Kind Code:
A3
Abstract:
The invention relates to a method for producing steel rolling bearing rings starting from a hot-rolled tube with a structure which is similar to the structure of spheroidite, and rings of the same continuous length which are hot-separated with the addition of a lubricant and re-machined after cooling. Hot separation occurs at a temperature which is above or below the transformation temperature of the steel used, followed by cooling. A green or soft ring pertaining to the rolling bearing ring with narrow tolerance shaped elements is produced from the raw ring by means of further cold machining.

Inventors:
TENBRACK KARL (DE)
FOERSTER WILFRIED (DE)
STEPHAN ROLAND (DE)
SOMMERFELD HERBERT (DE)
Application Number:
PCT/DE1998/001899
Publication Date:
May 27, 1999
Filing Date:
July 01, 1998
Export Citation:
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Assignee:
MANNESMANN AG (DE)
TENBRACK KARL (DE)
FOERSTER WILFRIED (DE)
STEPHAN ROLAND (DE)
SOMMERFELD HERBERT (DE)
International Classes:
B21D53/00; B23P13/04; B23P13/00; B23P15/00; C21D9/40; F16C33/64; (IPC1-7): B23P13/04; B23P15/00
Domestic Patent References:
WO1995029777A11995-11-09
WO1995034387A11995-12-21
Foreign References:
DE19541135C11997-04-30
GB1361553A1974-07-24
DE19513314A11996-10-10
DE3535811A11986-06-05
US3769671A1973-11-06
DE19520833A11995-12-21
DE3804654A11989-08-24
DE19526900A11997-01-23
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