| 摘要 |
PURPOSE:To aim at the shortening of time for grinding work to secure the desired accuracy of finishing, by avoiding use of a vitrified grinding wheel immediately after truing, and using it for grinding after the specified dressing is applied. CONSTITUTION:In prior to grinding, when a slide 31 is advanced forward, a truing roll 32 is pressed to a grinding wheel 2 and thereby its truing is carried out, another slide 41 is advanced forward simultaneously with retraction of the slide 31 afterward, and a dressing roll 42 is applied to a peripheral surface of the grinding wheel 2, thus dressing takes place, then grinding is started by regular grinding conditions with retreat of the slide 41 and advance of a wheel spindle stock 1. As for materials of this dressing roll 42, hardened steel or the like is used in the case of a vitrified CBN grinding wheel, and as for dressing work conditions, about 30-100m/s in wheel peripheral speed, about 4-30mm<2>/mm.s in dressing efficiency and about 100-800mm<3>/mm are suitable for. Thus, time for the grinding work required to secure the desired accuracy of finishing can be shortened.
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