Is due to grinding force control the grinding manner

摘要

PURPOSE:To stabilize a cycle time irrespective of the variation in sharpness and to reduce the defective roundness of a work, the grindstone wear and shape error in the axial direction, by monitoring the grindstone sharpness while under grinding, or estimating the variation in sharpness and changing a grinding force command value corresponding thereto. CONSTITUTION:The grinding force and grinding speed under grinding action are detected by detectors 13, 18. A grinding force command value is found by using a threshold force Fo, grindstone sharpness coefficient K and preset grinding speed set value v on each cycle from these detection values. A grindstone notch control is then performed by a notch control unit 14 so that an actual grinding force becomes the grinding force command value.