Werkzeugmaschine, wie Schälmaschine, Poliermaschine od. dgl., mit einem um eine Achse umlaufenden Werkzeugträger

摘要

The tool holder (6) rotates with the rotor (11) of its drive motor about the axis (7) of the workpiece (4) in a circular cylindrical opening (3) in the housing (2), which contains the stator (12) and the rotor end bearings comprising three sets of radial and axial electromagnets (8-10), which are adjustable so that the ends of the rotor float freely out of contact with the bearings while the machining forces are transmitted to the housing. The axial spacing is maintained by a larger electromagnet (9) working in one direction and a smaller one (10) in the opposite direction.