Metal deforming – By use of tool acting during relative rotation between tool... – Spherical tool
Reexamination Certificate
2006-04-07
2009-10-13
Tolan, Edward (Department: 3725)
Metal deforming
By use of tool acting during relative rotation between tool...
Spherical tool
C072S011100, C072S017100, C072S017300, C072S020100, C072S416000
Reexamination Certificate
active
07600404
ABSTRACT:
The present invention relates to a surface treatment apparatus and method for inducing compressive residual stress in the surface of a workpiece with dimensional variations. The method comprises the acts of measuring the dimensions of the workpiece during a surface treatment operation and adjusting the surface treatment process parameters to account for the measured dimensions. In one embodiment, the apparatus comprises two surface treatment elements oriented in opposition to one another in a caliper configuration. The surface treatment elements are positioned and impinged against the surface of a workpiece by an actuator controlled by a computer control unit. The depth to which the surface treatment elements are impinged is precisely controlled to achieve the desired magnitude and depth of compressive residual stress. A sensor operatively connected to the apparatus senses and relays the dimensions of the workpiece to a computer control unit that adjusts the operating parameters accordingly.
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International Search Report and Written Opinion under the PCT for corresponding patent application, dated Oct. 23, 2008, 8 pages.
Smith Mark F.
Smith Brandenborg Ltd
Surface Technology Holdings Ltd.
Tolan Edward
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