AUTOMATIC BALANCER OF ROTARY GRINDING STONE

摘要

PURPOSE:To enable to perform grinding efficiently by a method wherein the generation of unbalance due to the wear or the like of the rotating grinding wheel is automatically detected and the unbalance is automatically compensated by supplying fluid. CONSTITUTION:When vibration occurs in a center axis 1 or the like due to the partial wear or the like of the rotating grinding wheel, a vibrometer 12 detects the vibration and nearly exactly cyclic vibration signals are obtained from the detected vibration by means of a band-pass filter 13. Controlling signals are formed from said vibration signals by means of a phase compensator 14 and inputted to a pulse generator 15 in order to be converted to pulses to generate. Said pulse signals are applied to a supersonic generator 16, resulting in generating amplified vibration in a vibration horn so as to vibrate a ball valve 22 in order to jet fluid from a fluid injection nozzle 17. The nozzle 17 is installed opposite to a plurality of pockets 7 provided concentric to the grinding wheel 4. Time lag based upon the phase difference in rotation between said controlling signals and generated pulses is adjusted by said phase compensator 14.