| 摘要 |
A grinding machine ( 1 ) for grinding a workpiece ( 40 ) comprises the following components: a cup wheel ( 10 ) having an annular grinding surface ( 11 ); a disc-shaped electrode ( 60 ), which is positioned in the vicinity of at least a portion of the grinding surface ( 11 ) such that a dressing area ( 75 ) is obtained in which a relatively small gap is present between the electrode ( 60 ) and the grinding surface ( 11 ), feed means ( 70 ) for feeding electrolyte to the dressing area ( 75 ); and a generator ( 20 ) for generating an electric current between the grinding surface ( 11 ) and the electrode ( 60 ), via the electrolyte. The electrode ( 60 ) is movable with respect to the dressing area ( 75 ), so that contamination of the electrode ( 60 ), which normally occurs as a result of the dressing process, is continuously removed. Consequently, the quality of the dressing process is maintained at a high level.
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