Abstract
According to the weak rigidity and complex structure of aerospace thin-walled parts, an auxiliary support method based on magnetorheological fluid, a dynamic model, and a simulation prediction model are proposed. In this paper, the magnetic field distribution in the space of magnetorheological fluid fixture is simulated, analyzed, and measured. Then, the magnetic force is deduced and the empirical formula of milling force is adopted. Based on the Rayleigh damping matrix and the Equivalent force principle, the dynamic model of magnetorheological fluid fixture-complex workpiece is established. In order to find the optimum parameters of magnetorheological fluid (MRF) fixture, the effects of MRF volume, the location, and the magnetic field intensity on vibration suppression are analyzed. Hence, the conclusion is validated by the design of MR fixture experiment and simulation experiment, and the processing quality of thin-walled workpiece has been improved by maching tests.
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