| 摘要 |
PURPOSE:To aim at making directional properties correctable in an automated manner even if there is a drift in the directional properties between the work part of a workpiece and a grinding wheel, by letting the grinding wheel carry out infinitesimally eccentric rotation. CONSTITUTION:A workpiece W is secured to a slide table 7 while a grinding wheel 43 is attached to a chuck 41. When a spindle shaft 33 is rotated, as the chuck 41 is eccentrically attached to the spindle with an infinitesimal amount, the chuck 41 and the grinding wheel 43 both carry out eccentric rotation with an infinitesimal radius. With this eccentric rotation, the grinding wheel 43, for example, as in illustration, is displaced in both lateral directions and thereby the workpiece W consequently becomes as well displaced in both lateral directions as following the grinding wheel. Its following sequence is promptly carried out by means of balls 9 interposed in between. Therefore, when a part of the grinding wheel 43 and a work part Wa of the workpiece W hit each other at one point instead of coordinating each other, the workpiece rotates as its hitting part is automatically pushed aside, so that directional properties between the grinding wheel 43 and the work part Wa of the workpiece W can be congruent and yet automatically coordinated. |
