The Imbalance Source of Spindle-Tool System and Influence to Machine Vibration Characteristics

Because of various errors in the process of special structural designing, manufacturing and assembLing, there are varying degrees of unbalanced residual content in machine spindle-tool system. This research presents some kinds of imbalance source of spindle-tool system, on the basis of classification, and then its component´s dynamic balancing quaLity grade influenced on the balanced state of entire system was demonstrated. By means of machine raising-speed idle running in CNC machine, three cases of testing machine vibration signal and analyzing its characteristics were investigated in turns, including spindle witHout assembLing tool system, the spindle with assembLing perfect balanced tool system and the spindle with various imbalance of tool system. The comparing results and conclusions will provide effective guideLine on the researching about spindle-tool system´s imbalance influence to high speed machining stabiLity and processing quaLity.