| 摘要 |
PURPOSE:To provide high accuracy working by grinding the grinding allowance of a concave corner of a work by a grinding wheel having an acute angle to form an edge and then grinding the grinding allowance of the side by a grinding wheel having the grinding side at a predetermined inclined angle. CONSTITUTION:When an edge having a corner 10c of fitting recess 3 is produced, the grinding allowance of the corner 10c is at first ground by a corner 16c of a grinding wheel 16 having an acute angle made by a circumferential surface 16a and a side surface 16b to produce a sharp edge. Next, only the grinding allowance of the side surface 11b other than the corner 10c is ground by a grinding wheel 12 having the same inclined side surface as a side wall 11b. Thus, since the corner of the grinding wheel 12 does not participate in grinding the corner 10c, the sharp edge can be maintained. Also, the grinding wheel 12 will do without surface grinding such as reshaping for edge grinding, operating time can be shortened and high accuracy working can be thus provided. |
