Method and apparatus for dressing a grinding wheel.

摘要

An apparatus for dressing a grinding surface of a grinding wheel by a dresser comprises means for measuring a diameter of a cylindrical workpiece ground by the grinding wheel, means for measuring a circularity of the workpiece based upon the measured diameter of the workpiece, means for detecting length of time period in which the circularity becomes a predetermined allowable value, means for judging whether or not the detected time length exceeds a first setting time, and means for starting a dressing operation using the dresser when the detected time length exceeds the first setting time. Likewise, when the number of the workpieces which have been ground after last dressing operation becomes a preset value, the grinding wheel is dressed by the dresser. <IMAGE>