Title:
COLD FORMED DIFFERENTIAL HOUSING WITH INTEGRATED RING GEAR
Document Type and Number:
WIPO Patent Application WO2004028722
Kind Code:
A8
Abstract:
A method for making a differential housing (20) having a ring gear (30) integrally formed therein includes the steps of providing a differenntial housing having an annular rim integrally preformed therein; supporting the differential housing between upper and lower halves of a rotatable holding tool such that the annular rim extends radially outwardly from the holding tool for movement therewith; providing a thickening tool having a tool surface engagable with the annular rim during rotation of the holding tool to form a thickened lip; and providing a gear forming tool engagable with the thickened lip during rotation of the holding tool, whereby a plurality of teeth are formed along the lip to form the ring gear.
Inventors:
LINDSAY ALAN (CA)
LI JIANWEN (CA)
LI JIANWEN (CA)
Application Number:
PCT/CA2003/001486
Publication Date:
July 22, 2004
Filing Date:
September 29, 2003
Export Citation:
Assignee:
TESMA INT INC (CA)
LINDSAY ALAN (CA)
LI JIANWEN (CA)
LINDSAY ALAN (CA)
LI JIANWEN (CA)
International Classes:
B21D53/28; B21K1/26; B21K1/30; B21K21/06; F16H48/08; (IPC1-7): B21D53/28; F16H48/08
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