213 Development of High Precision Contour Grinding Method under Consideration with both Curvature Radius Change of Workpiece and Thermal Deformation of Machine Structure

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In contour grinding, grinding force varies in a complex way, because the curvature radius of a workpiece varies and the real depth of cut is also influenced by the thermal deformation of a machine structure. Since low stiffness tools are generally used in contour grinding, the fluctuation of a grinding force results in a lower machining accuracy. In this study, therefore, in order to establish the high precision contour grinding method, the reference position correct sensor is developed to compensate the thermal deformation of a machine structure, and the controlled normal force grinding technique is proposed to restrain the fluctuation of a normal grinding force. High performance contour grinding method, with which both constant surface roughness and high dimensional accuracy can be obtained in any curvature radius of a workpiece, is developed by using the controlled normal force grinding method with the reference position correct sensor.

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