A286高温合金钉套多工位冷镦工艺研究

    Research on Multi-station Cold Heading Process for A286 Superalloy Sleeves

    • 摘要: A286高温合金钉套作为连接构件被广泛应用于航空航天领域。设计了两套钉套冷镦成形工艺方案,借助有限元仿真软件DEFORM-3D对钉套冷镦过程进行模拟分析,对比两套方案的成形效果,深入分析了冷镦过程中的金属流动规律、成形载荷变化、金属流线分布和等效应变特征。针对钉套头部成形载荷开展优化研究,建立神经网络模型实现最大成形载荷预测并优化,确定最佳工艺参数组合。结果表明,最优工艺参数组合如下:成形速度30.45 mm/s,摩擦系数0.081,顶针角度80.47°,顶针圆角0.57 mm。神经网络预测数据与仿真结果的误差为3.6%。研究结果可为薄壁钉套构件的冷镦成形工艺设计提供参考。

       

      Abstract: A286 superalloy sleeves are widely used in aerospace connections components. Two kinds of cold heading forming schemes for sleeves were developed, and the finite element simulation software DEFORM-3D was used to simulate and analyze the cold heading process of the sleeves. The forming effect of the two schemes was compared, and the metal flow law, forming load variation, metal flow line distribution and effective strain characteristics during cold heading were analyzed thoroughly. Aiming at the forming load of the head of the sleeve, the optimization research was carried out. A neural network model was developed to predict and optimize the maximum forming load, and the optimal combination of process parameters was determined. The results show that the optimal process parameters are as follows: forming speed of 30.45 mm/s, friction factor of 0.081, pin angle of 80.47°, and pin rounding angle of 0.57 mm. The error between the predicted data of the neural network and the simulation results is less than 3.6%. The research results can provide a reference for the cold heading process design of thin-walled sleeve components.

       

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