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Multi-objective optimization of process parameters for 7050 aluminum alloy rib-web forgings' precise forming based on Taguchi method

机译:基于TAGUCHI方法的7050铝合金肋骨网锻件工艺参数的多目标优化

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摘要

The precision forming of rib-web forgings can effectively increase strength and toughness of forgings and improve material utilization simultaneously. However, inappropriate selection of process parameters can cause defects such as under-filling, cross flow, and etc. Thus the optimization of process parameters is essential for getting, good products. In this paper, we combined the finite element method with Taguchi method to optimize the precision forming process of rib-web forgings through multi-objective design. The macro-and microstructure of products were used to verify the result of simulation. The flow line microstructure and the die-fill quality were chosen as optimal objectives; and, the optimal combination of parameters for the analyzed process window was obtained through the variance analysis and signal-to-noise ratio analysis of the simulation results. The results suggest that initial temperature and height-width ratio of the billet are the most crucial factors affecting the forging quality in the analyzed area. In addition, the optimal combination of parameters is A4 (450 °C) B1 (0.1 mm/s) C4 (H / B =5) and D3 (μ = 0.3). Finally, the production experiment verified the prediction quite well, which confirmed the effectiveness of the proposed optimization method.
机译:肋网锻件的精确形成可以有效地提高锻件的强度和韧性,并同时提高材料利用。然而,不恰当的过程参数选择可能导致诸如填充填充,交叉流动等缺陷等的缺陷,因此过程参数的优化对于获得良好的产品至关重要。在本文中,我们将有限元方法与Taguchi方法组合以优化通过多目标设计的肋网锻件的精密成形过程。使用产品的宏观和微观结构用于验证模拟结果。流动线微观结构和模填充质量被选为最佳目标;并且,通过仿真结果的方差分析和信噪比分析获得分析的过程窗口的参数的最佳组合。结果表明,坯料的初始温度和高度宽度比是影响分析区域中锻造质量的最关键因素。此外,参数的最佳组合是A4(450℃)B1(0.1mm / s)C4(H / B = 5)和D3(μ= 0.3)。最后,生产实验效果核实预测,这证实了所提出的优化方法的有效性。

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