| 摘要 |
PURPOSE:To reduce the grinding force remarkably, by rotating a grinding wheel while vibrating axially and radially with supersonic frequency then rotating or linearly moving a work while advancing/retreating in the cutting direction of the grinding wheel and bringing it into intermittent contact with said grinding wheel. CONSTITUTION:A grinding wheel 15 is vibrated with supersonic frequency (f) and amplitude (as) in the direction of its rotary spindle or an arrow direction 14. Consequently, respective abrasive grain groups move in zigzag at grinding points on a grinding area 17 and abrade each other so as to cut the chips finely. As a result, a pulsating grinding waveform 16 can be produced. Then a table is fed with speed (v)<22piAF and the pulsating grinding force is applied intermittently. Alternatively, a stepping motor is employed and applied with three pulse advance PF, one pulse pause PR, two pulse back PB and one pulse pause PR2, for example, so as to move the table linearly while vibrating thus carrying out grinding work with intermittent grinding force waveform. |
