A structural analysis and optimum of a deformable unit for revolving magnetic actuation mechanism

For boring of non-circular hole the key is to apply a force to a boring bar radically. A revolving magnetic actuation mechanism composed of a magnetic stator and a magnetic rotor has been designed, and a magnetic force between the stator and rotor can be controlled. The main component of the rotor is a flexure-hinged based elastic deformable unit. This unit connects a spindle at one hand and a boring bar at the other hand. With the help of magnetic force, micro-displacement between the two ends of the deformable unit can be produced while the rotor runs at a high speed. The design method of the deformable unit has been studied comprehensively. The micro-displacement characteristics of the deformable unit have been analyzed. An optimizing process for the deformable unit based on FEM has been presented. The results indicate that the method proposed is rather effective and would provide a practical way for the design of a revolving electromagnetic actuation mechanism.