| 摘要 |
PURPOSE:To improve working accuracy and reduce working time by a method wherein both ends of the lacked circular column part at one end of a toggle plate or the like are held so as to keep the center of curvature of the column part, and the column part is worked by reciprocating a rotary grindstone under swinging the other end of the plate, which is not held, with a cylinder rod. CONSTITUTION:The grindstone 17 is rotated and the toggle plate 1 is swung while a grindstone stand is approached to the column part of the toggle plate 1 and, then, the grindstone is contacted with the column part with a desired grinding thickness to begin the grinding work. After beginning the grinding, the grindstone stand is moved along the toggle plate with a proper speed and, then, the grinding of the desired thickness may be effected. If necessary, the grindstone table is moved again to the beginning side of the grinding on the toggle plate 1 and the grinding thickness is increased to effect re-grinding. Thus, the lacked circular column part of the plate or the like may be ground with a high working accuracy in a short period of working time. |
