In the grinding wheel the ultrasonic vibration the precise compound grinding manner null which is superimposed the low frequency vibration

摘要

PURPOSE:To reduce the average grinding temperature rise and to reduce the grinding force remarkably, by vibrating a grinding wheel or a work in the cutting direction with low frequency while vibrating the grinding wheel axially or radially with supersonic frequency. CONSTITUTION:A grinding wheel 18 is vibrated axially 14 with supersonic frequency (F) and amplitude (as) while simultaneously vibrated radially 16 with supersonic frequency (f) and amplitude (ar) and rotated as an axial/radial supersonic vibration grinding wheel 18. Furthermore, it is vibrated in the direction of an arrow 10 with low frequency F and amplitude A so as to carry out grinding. Consequently, chips are crushed finely through combined function of a mechanism where the loci of the motion of respective abrasive grains cross violently on the grinding face and a mechanism having discontinuous cutting depth, so as to produce an intermittently pulsating grinding force waveform having low pulsating grinding force P7 thus realizing precise grinding.