Method for Motor-integrated Dampening of Spindle Oscillations in Machine Tools

Oscillation phenomena in cutting machine tools reduce the productivity and quality of the elements produced. Goal of this research project is an active dampening of oscillations at main spindle units of  milling machines. Basis of the dampening method is to integrate magnetic actors into the active part of a synchronous spindle motor. For this purpose, different construction types are investigated concerning their capability to compensate oscillations, in order to realise an optimised variant in a prototype spindle. The detection of spindle oscillations is achieved by means of sensors. Their optimum position in the spindle system has to be identified, and based on real-time evaluation, dampening forces are generated by means of the magnetic actor.