Prediction of Loads and Stresses in Closed-Die Forging
Prediction of Loads and Stresses in Closed-Die Forging
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DOI：
10.1115/1.3427954
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发表时间：
1971-05
期刊：
影响因子：
--
通讯作者：
T. Altan;R. Fiorentino
中科院分区：
文献类型：
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作者：
T. Altan;R. Fiorentino
对实际锻件中预测最大载荷的各种经验公式进行了综述。假设材料-工具界面处存在恒定的摩擦剪切应力，将平板分析方法应用于斜面下的一般镦粗操作。推导了平面应变和轴对称变形的应力和载荷方程。提出了一种确定实际锻件流动模型的方法。该方法比虚拟磁盘模型给出了更好的锻造载荷近似。本文提出的理论应用于室温下的铅锻件和1180℃下的1043钢锻件，与预测和实验结果一致，在有用的工程精度范围内。
Various empirical formulas for predicting the maximum load in practical forgings are reviewed. Assuming a constant friction shear stress at the material-tool interface, the slab method of analysis is applied to the general upsetting operation under inclined surfaces. The stress and load equations are derived for plane strain and axisymmetric deformation. A method for determining flow models in practical forgings is presented. This method gives better approximations of forging loads than the fictitious disk model. The theory presented in this work is applied to a lead forging at room temperature and to a 1043 steel forging at 1180 C. The agreement with predictions and experimental results are within useful engineering accuracy.