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首页> 外文期刊>Journal of Materials Engineering and Performance >Investigation of Process Parameters for the Backward Extrusion of Arbitrary-Shaped Tubes from Round Billets Using Finite Element Analysis
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Investigation of Process Parameters for the Backward Extrusion of Arbitrary-Shaped Tubes from Round Billets Using Finite Element Analysis

机译：基于有限元分析的圆坯向后挤压任意形状管材的工艺参数研究

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摘要

Process simulation for the backward extrusion of internally arbitrary-shaped tubes from circular billets is presented in this article. ABAQUS/Explicit finite element method has been used to analyze the problem. This kind of analysis has been done before using analytical methods such as the upper bound theorem. However, the FEM solution presented here is the first of its kind. Values of stress, strain, and spatial velocity at different points in the deformation field were obtained. To observe the flow of the material during the process, grid deformations were also produced for the backward extrusion using the FEM package. Circular shape for the initial billet and arbitrary shapes for the final tube’s cross sections were considered and FEM solutions were given for each. The shapes considered were elliptical, rectangular, and circular-shaped tubes and circular billets. The variation of extrusion load for the backward extrusion process was obtained for different values of reduction of area, aspect ratio, and friction factor. Also, the effect of these parameters on velocity field and free surface configuration were investigated in this simulation. The results produced from this work were compared with the theoretical and experimental results of other workers and good agreements were observed and some improvements in some of the results were also seen.
机译：本文介绍了从圆形坯料向后挤压内部任意形状的管的过程模拟。 ABAQUS / Explicit有限元方法已用于分析问题。在使用诸如上限定理之类的分析方法之前，已经进行了这种分析。但是，此处介绍的FEM解决方案尚属首次。获得了变形场中不同点的应力，应变和空间速度的值。为了观察材料在加工过程中的流动，使用FEM套件向后挤出时还产生了网格变形。考虑了初始坯料的圆形形状和最终管的横截面的任意形状，并为每种坯料提供了FEM解决方案。所考虑的形状是椭圆形，矩形，圆形的管子和圆形的钢坯。对于面积，纵横比和摩擦系数的减小值，获得了后向挤压过程中挤压载荷的变化。同样，在此模拟中研究了这些参数对速度场和自由表面构型的影响。将这项工作产生的结果与其他工人的理论和实验结果进行了比较，并观察到了良好的协议，并且还看到了一些结果的一些改进。

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