Abstract
The spindle speed variation (SSV) method for chatter suppression in drilling was studied. The existing chatter suppression methods used at various types of metalworking, including the drilling process, were analyzed. The spindle speed variation method was described. The experimental setup, which consists of the measuring equipment and the cutting tool, was described. Software and constructive ways for implementation of the SSV method were analyzed. The experimental data on CNC machine capabilities to vary spindle speed rates were presented. SSV method implementation constraints for a specific machine were analyzed. The recommendations for the choice of modulation parameters were given. Modal analysis results for a technological system were presented. Constant spindle speed cutting and variable spindle speed cutting were compared. The effects of spindle speed variation parameters on the chatter amplitude and surface roughness were studied. A spindle speed variation depth ensuring a high-quality surface finish was determined. The dependence of machined sample displacement vibration on a spindle speed variation depth was determined. The experimental results were interpreted.
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