| 摘要 |
PURPOSE:To make both axial centers of a tool and a work congruous in a highly accurate manner, by detecting and compensating the amount of eccentricity between an axial center and a rotary shaft of the work. While making the amount of said eccentricity between the axial center and the rotary shaft of the tool so as to be detected and compensated. CONSTITUTION:In the event of machining a coaxial hole into a cylindrical work by means of electric discharge machining or the like, a work 3 is set to a holder 2 and rotated together with the holder 2 as centering on a rotary shaft 15. The amount of surface displacement of the work 3 is detected by a first sensor 46, then the amount of eccentricity between an axial center of the work 3 and the rotary shaft 15 is detected and the amount of said eccentricity is compensated by a first XY driving mechanism 8. Next, the amount of eccentricity between the axial center of a tool 34 and the rotary shaft 15 is detected out of the amount of surface displacement of the tool 34 by a second sensor 47 attached to the supporter 11, and the position of the rotary shaft 15 is compensated by a second XY driving mechanism 16, thus axial centers of the tool and the work are conformed. |
