| 摘要 |
PURPOSE:To determine automatically and correctly whether the remaining amount to be ground reaches an allowable range with ease without interrupting grinding operation by mounting a sensor in the vicinity of a dressor. CONSTITUTION:To perform numerical-controllingly grinding operation for an initial grinding allowance assuming that a grinding wheel 15 is not worn and then the grinding wheel 15 is dressed in accordance with a prescribed amount of cutting which is set in advance by an in-process system. At this instance, a sensor 25 detects a reaction which a dressor 27 receives from the grinding wheel 15. If the detected reaction is greater than a prescribed threshold value, it is determined automatically that the amount of wear of the grinding wheel 15 in the preceding grinding cycle is so small that a grinding of a workpiece which is proportional to the amount of wear of the grinding wheel 15 has proportional to the amount of wear of the grinding wheel 15 has been reached an allowable range. On the contrary, if the detected reaction is less than the prescribed threshold value, it is determined automatically that the workpiece has not been sufficiently ground in the preceding grinding cycle and the grinding cycle must be repeated furthermore.
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