Abstract: Thin-disk parts are common parts on rotor mechanism,which usually need to be tested and calibrated for dynamic balance before assembly and commissioning.At present,the commonly used dynamic balancing calibration methods have problems such as the separation of processing and calibration,complex balancing process and low efficiency.Based on these problems,a method is proposed to correct the unevenness during the machining of thin-disk workpieces,and combine the spindle quasi-stop,tool positioning and de-weighting control functions of the composite CNC machine tool to perform online de-weighting correction of thin-disk workpieces.Meanwhile,in order to improve the correcting accuracy,an iterative control method with weight moving rate is proposed,and its stability is proved theoretically.The advantages of iterative control method with weight moving rate are discussed by simulation analysis,and the ideal weight moving rate selection method is discussed. The research content can realize online de-weighting correction of thin-disk workpieces unbalance without dynamic balancing machine,and the balance efficiency and accuracy can be improved,the balance cost can be reduced.

Key words: thin-disk workpiece, unbalance vector, weight moving model, iterative weight moving, weight moving rate