Method for manufacturing outer ring and inner ring of bearing
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United States of America Patent
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Issued Date -
May 22, 2003
app pub date -
Nov 20, 2002
filing date -
Nov 20, 2001
priority date (Note) -
Abandoned
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Abstract
In a method for manufacturing outer and inner rings of a bearing, the method being characterized in that it comprises the steps of: cutting a cylindrical bar material to form a circular plate work of a predetermined width, forming on both plain sides surface of the work through cold forging operation a central circular recess provided around the axis of the work and an annular groove provided concentrically with respect to the recess, forming a central circular aperture by punching out the recess remaining material in the axial direction, punching out the groove remaining material in the axial direction to form an outer work for the outer ring and an inner work for the inner ring, and machining each work respectively through cutting, grinding and/or polishing operations to form ring raceways or to finish the surface thereof for manufacturing the outer and inner rings.
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