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Controlling-method-for-a-grinding-machine

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Controlling method for a grinding machine

Details

Inventors: Sugita, Terumitsu; Tateishi, Yasuo;
Assignee: Seiko Seiki Kabushiki Kaisha (JP)
Primary Examiner: Whitehead; Harold D.
Assistant Examiner:
Attorney, Agent or Firm: Burns; Robert E., Lobato; Emmanuel J., Adams; Bruce L.

During rough grinding operation of a grinding machine, metal removal rate of the workpiece is detected for shifting the changing point from the rough grinding to fine grinding, and, with larger metal removal rate, the changing point is shifted earlier and vice versa with smaller rate to thereby keep approximately constant fine grinding stock removal to ensure minimum cycle time necessary for grinding work even if the grinding ability of the grinding machine is changed.

DETAILED DESCRIPTION Therefore, it is a principal object of the present invention to provide a controlling method for controlling a grinding machine with which a fine grinding condition is kept approximately constant for all states of grinding ability of the grinding wheel so that the cylindricity and surface roughness of the workpieces are made uniform and further that the cycle time for grinding a workpiece is not prolonged exceedingly.
In this method, metal removal rate (this changes in response to the grinding ability of the wheel) is measured in a proper time, and the changing point from rough grinding to fine grinding is shifted earlier or later in response to the metal removal rate.

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