US 5,355,633 AGranted

Method of grinding a workpiece having plural cylindrical portions with plural grinding wheels

AssigneeToyoda Koki Kabushiki Kaisha

InventorsToshio Ishikawa, Masahiko Yokoi, Shozo Kobayashi, Hisashi Kubota, Yoshiki Kawachi

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Abstract

A method of grinding plural journal portions of a workpiece with plural grinding wheels. In the method, a pair of work rests are used to support two selected journal portions, and the selected two journal portions have a larger initial diameter as compared with the rest of the journal portions. Initially, the selected journal portions are ground without using the work rests. When the diameter of the selected journal portions becomes substantially equal to the diameters of the rest of the journal portions, the work rests are advanced to support the selected journal portions. After that, the grinding wheels are again advanced to grind all the journal portions.

Claims4

Dependent claims

A method of grinding plural cylindrical portions of a workpiece with plural grinding wheels, wherein said method comprises the steps of:

providing a workpiece having plural cylindrical portions to be ground, the diameter of at least one selected cylindrical portion being larger than those of the rest of the cylindrical portions, said at least one selected cylindrical portion being fewer in number than all of said plural cylindrical portions;
providing a work rest having a movable contact shoe which is engagable with an outer surface of said at least one selected cylindrical portion;
positioning said contact shoe at a position away from the outer surface of said at least one selected cylindrical portion;
advancing said grinding wheels in a first grinding step to partially grind said at least one selected cylindrical portion and fewer than all of said plural cylindrical portions;
advancing said contact shoe for supporting the outer surface of said at least one selected cylindrical portion which has been partially ground;
and
advancing said grinding wheels to grind all of said cylindrical portions to a predetermined dimension.

4 more elements

Dependencies are inferred from the claim text.