| 摘要 |
PURPOSE:To enable the outer edge part of a magnetic head or the like to easily perform chamfering of asymmetrical shape, by eccentrically placing the rotary center for the chamfered objective surface center of a workpiece and chamfering the outer edge part giving a predetermined tilt to the periphery of a cylindrical tool. CONSTITUTION:Holding a workpiece 6 of magnetic head or the like, forming a rectangular parallelepiped shape, to a holding part 8, when chamfering of oval shape 2aX2b with a point P serving as the center is performed for a chamfering objective surface 2AX2B with a point O serving as the center, the rotary center of the workpiece 6 is displaced from ll' to mm' by an X-direction eccentric amount adjusting screw 9. And setting a tilt angle range of the workpiece 6 to a control unit 21, adjusting an eccentric amount of an eccentric disc 14 and performing rotary motion and swivel motion in a swivel direction 5 of a cylindrical grinding wheel 1, a chamfering device, which rotates the workpiece by a motor 16 in a direction 7 while changing tilt angle continuously by swiveling a rotary table 18, chamfers the workpiece pressing it by a spring 11. Further for eccentricity, when it is performed in an axial direction bb, a Y-direction eccentric amount adjusting screw 10 is used. In this way, asymmetrical chamfering can be easily performed. |
