Workpiece grinding method

A workpiece grinding method of removing a grinding allowance at at least an end surface portion of a workpiece having a cylindrical portion and the end surface portion perpendicular thereto with a grinding wheel by rotating the workpiece, by rotating the grinding wheel supported rotatably about an axis extending in parallel with the axis of the workpiece, and by moving the grinding wheel relatively to the workpiece, the method comprising:

• a first grinding step of grinding the end surface portion to an approximately right triangle shape in section by feeding the grinding wheel from a grinding start position, where the grinding wheel overlaps the circumferential surface of the end surface portion through a grinding width of the grinding allowance or a grinding width narrower than the grinding allowance, toward an infeed end position on the side of the cylindrical portion in an oblique direction in which the grinding width of the end surface portion in the direction parallel to the axis of the workpiece which is ground in the first grinding step is narrowed as the grinding wheel approaches the infeed end position;
• and
• a second grinding step of removing a grinding allowance of the approximate right triangle shape in section of the end surface portion left without being ground at the first grinding step, by feeding the grinding wheel in an approximately axial direction of the workpiece;
• whereby the end surface portion is ground to be approximately perpendicular to the cylindrical portion through the first and second grinding steps.