| 摘要 |
PURPOSE:To accurately detect the cutting property of a grinding wheel and properly judge the correcting timing of the grinding wheel by obtaining the deflecting quantity of a wheel spindle with the changeover point from rough grinding to finish grinding as a reference and comparing this deflecting quantity with a previously set limit deflecting quantity. CONSTITUTION:In order to detect the correcting timing of a grinding wheel 1, a wheel spindle 6 is fed by screw by a cutting mechanism 8 to grind a workpiece W while detecting the machining position of the workpiece W by a machining position detecting means 3. And, the machining quantity of the workpiece W is calculated by a machining quantity operating means 5 in accordance with the detected signal outputted from a detecting means 3. Also, the cutting quantity of the wheel spindle 6 is calculated by a cutting quantity operating means 10 in accordance with the detected signal outputted from a cutting position detecting means 9. Then, the deflecting quantity of the wheel spindle 6 is obtained by a deflecting quantity operating means 11 based on the machining quantity of the workpiece W and the cutting quantity of the wheel spindle 6. And, the deflecting quantity of the wheel spindle 6 is compared with the limit deflecting quantity by a correcting timing judging means 12, to accurately judge the correcting timing of the grinding wheel 1.
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