| 摘要 |
PURPOSE:To obtain considerably accurate finish with no reduced effective width of cut by forming on a work surface annular grooves each having a depth substantially equal to the depth of cut and grinding the remaining work surface up to the depth of cut of the grooves. CONSTITUTION:A pair of plate type grinding stones 18, 18 are mounted to a grinding stone mounting surface 16 of a grinding stone support 14 of a holder 10 at both ends thereof, arranged with a width equal to an effective width of cut, and have cutouts 22 of a curvature corresponding to the radius of a work rod 20. The grinding stones 18, 18 are pressed against the peripheral surface of the work rod 20 rotating in the direction indicated by an arrow A to form at both ends of a strip work surface 30 a pair of annular grooves 34, 34 having a depth equal to the depth of cut of the work surface 30, and a finishing grinding stone fixedly secured to the support and having a concaved abutting surface of a curvature corresponding to the radius of the work rod 20 is pressed, with oscillation, against the strip work surface 30 between the grooves 34, 34, which can be cut up to a depth equal to that of the grooves 34 with a high accuracy. |
