A model of deformation of thin-wall surface parts during milling machining process
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A three-dimensional finite element model was established for the milling of thin-walled parts. The physical model of the milling of the part was established using the AdvantEdge FEM software as the platform. The aluminum alloy impeller was designated as the object to be processed and the boundary conditions which met the actual machining were set. Through the solution, the physical quantities such as the three-way cutting force, the tool temperature, and the tool stress were obtained, and the calculation of the elastic deformation of the thin-walled blade of the free-form surface at the contact points between the tool and the workpiece was realized. The elastic deformation law of the thin-walled blade was then predicted. The results show that the maximum deviation between the predicted value and the actual measured machining value of the elastic deformation was 26.055 μm; the minimum deviation was 2.011 μm, with the average deviation being 10.154 μm. This shows that the prediction is in close agreement with the actual result.
Key wordsthin-walled surface parts milling force elastic deformation finite element model
建立了薄壁零件铣削加工的三维有限元模型。以AdvantEdge FEM 软件为平台,建立零件铣削 的物理模型。以铝合金叶轮为被加工对象,设定符合实际加工的仿真边界条件,通过求解得到三向切 削力、刀具温度及刀具应力等物理量,并计算自由曲面薄壁叶片实例在各个刀触点处的弹性变形量, 预 测了薄壁叶片实例的弹性变形规律。结果表明:弹性变形预测值与实际加工测量值之间的最大偏差为 26.055 μm,最小偏差为2.011 μm,平均偏差为10.154 μm,这表明预测结果与实际结果十分吻合。
关键词薄壁曲面零件 铣削力 弹性变形 有限元模型
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- WANG Chun, CHENG Hao, SU Bin. Johnson cook material model and simulation experiment of aluminum alloy 6005A [J]. Advanced Materials Research, 2012, 472–475: 510–514.Google Scholar