Aiming at the problems that weak stiffness and complex shape parts are difficult to grip and easy to deform during clamping,a flexible auxiliary support method with variable stiffness based on the magnetorheological fluid(MRF)was proposed to obtain ideal machining quality.Based on the controllability,reversibility and fast response of the magnetorheological effect,a magnetorheological adaptive flexible auxiliary support device for machining the thin-walled curved parts was developed through the structural design and magnetic circuit simulation.An optimization model with minimum machining deformation as the objective function was established to optimize the quantity and position distribution of the supporting units of the device.A milling experimental platform was built.Then the effects of layout optimization and excitation current on machining quality were investigated and verified by analyzing the milling signals.The results showed that the stiffness of optimized system increased effectively and the cutting vibration response reduced with the increase of current,and the machining quality was improved.
magnetorheological effectmagnetic field simulationlayout optimizationmilling testmachining accuracy
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