| 摘要 |
PURPOSE:To enable precise finish of such as rubber without sacrifice of machining profile accuracy, by applying low frequency vibration in the finishing direction while supersonic vibration in the perpendicular and parallel direction with the finishing direction onto a grinding wheel and applying a constant load onto the grinding wheel. CONSTITUTION:When the finishing direction and the direction of low frequency vibration 5 is y-axis, the loading direction 6 is z-axis and the direction of supersonic vibration is x-axis, a work 7 is fed in the finishing direction 8 with constant speed V toward a grinding wheel 1 and supersonic vibration of frequency (f) and amplitude (a) is applied in perpendicular and parallel direction with the finishing direction 8. Here, point (p) starts vibration from a point (o) and vibrates with quick period in supersonic region in the perpendicular direction with the finishing direction so as to start cutting in the finishing direction with one cycle of low frequency vibration from a solid line 12 point (e) and the vibration speed of low frequency vibration approaches to zero toward a point (d). When low frequency vibration is additionally applied in the finishing direction, supersonic vibration locus can be cut finely thereby soft material such as rubber can be grinded efficiently with high accuracy. |
