Abrading – Precision device or process - or with condition responsive... – Computer controlled
Reexamination Certificate
2008-03-14
2010-02-23
Eley, Timothy V (Department: 3724)
Abrading
Precision device or process - or with condition responsive...
Computer controlled
C451S009000, C451S010000, C451S360000
Reexamination Certificate
active
07666062
ABSTRACT:
A grinding wheel having a convex grinding surface is attached to a wheel spindle that is contactlessly supported by a casing through a controlled type axial magnetic bearing and controlled type radial magnetic bearings and that is rotated by an electric motor. A groove of a workpiece is ground by causing relative displacement of the casing. After the axial positioning of the casing is performed, the casing is radially displaced. Then, the groove is ground. The stiffness value of the axial magnetic bearing6is set to be lower than a normal value before the casing is radially displaced. After it is detected that the grinding surface of the grinding wheel touches the entire groove of the workpiece and that the grinding of the entire surface of the workpiece is started, the stiffness value is set back to the normal value.
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Eley Timothy V
JTEKT Corporation
McGinn IP Law Group PLLC
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