Regression analysis of the characteristics of vibro-cutting blade for tuffaceous rock

The vibro-cutting mechanism of a blade was experimentally tested for tuffaceous rock material. The influences of frequency and amplitude of displacement of vibro-cutting, the cutting velocity and the wave shape of vibration on the maximum excavation force were investigated. It was observed that the ratio of maximum horizontal component of excavation force of vibro-cutting to that of non-vibration tended to decrease hyperbolically with the increment of frequency for a constant amplitude of displacement. The specific energy decreased hyperbolically with the increment of the velocity ratio. The energy for the sinusoidal wave of vibration was always smaller than that for triangular wave. The ratio of specific energy at vibro-cutting to that at non-vibration decreased hyperbolically with the increment of mutual velocity. The sinusoidal wave of vibration of a blade was evaluated as more efficient for cutting tuffaceous rock than the triangular wave of vibration.