Research on Multi-Point Magnetic Auxiliary Fixture for Thin-Walled Workpieces
As typical thin-walled workpiece,aero-engine blades are weak-stiffness,complex surface and difficult processing materials which make it easily to deform during the machining process.To address the deformation caused by the weak-stiffness and difficult supporting of the complex surfaces during machining process,the existing phase change material auxiliary fixtures was firstly analyzed and a stress-free auxiliary support principle for thin-walled parts was proposed in this paper.Then,a multi-point magnetic auxiliary fixture for auxiliary support of blade-like thin-walled parts is designed based on the stress-free auxiliary support principle and the principle of discretization of complex surfaces.Furtherly,the clamping deforma-tion and auxiliary support ability are theoretically analyzed and experimentally studied.Finally,a blade is machined with the designed auxiliary fixture and the results shows that the multi-point magnetic auxiliary fixture can enhance the rigidity of weakly rigid workpieces and reduce machining deformation significantly.
blade machiningdeformation controlcomplex surface clampstress-free auxiliary clampingmulti-point magnetic auxiliary fixture
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