Methods of making ball nuts for preloaded ball nut and screw assemblies
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United States of America Patent
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-
Feb 20, 1996
Grant Date -
N/A
app pub date -
Jan 26, 1994
filing date -
Jan 26, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of making ball screw and nut assemblies, and the products which result, wherein the nut is provided with a deformable wall portion of decreased compressive strength interjacent the ends of the nut. A compressive force is applied to the nut to axially deform the portion of decreased compressive strength while not changing the lead of adjacent lands and grooves in the non-compressed portion of the nut. The axial position of the lands and grooves in the non-compressed portion is thereby axially displaced such as to preload a recirculating train of balls traveling along the non-compressed portion of the nut relative to the lands and grooves of the screw, when the screw, nut, and balls are assembled.
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