Development of forging process design to close internal voids
Development of forging process design to close internal voids
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DOI：
10.1016/j.jmatprotec.2009.09.022
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发表时间：
2010-02-01
影响因子：
6.3
通讯作者：
Imaida, Yutaka
中科院分区：
文献类型：
--
作者：
Kakimoto, Hideki;Arikawa, Takefumi;Imaida, Yutaka
本文采用二维有限元法（FEM）模拟钢锭在压缩过程（镦粗过程）中的空洞，通过变形分析研究了内部空洞的闭合行为。在压缩过程中，进行了使用内部空隙的模型实验，以确认变形分析的准确性。通过模型试验与理论分析结果的对比，验证了本文分析方法能够较好地模拟混凝土内部的脱空行为。通过分析研究了缩径比与孔洞形状和位置的关系。在锻造过程中，通过模型实验和三维有限元计算，计算出了内部空洞闭合的评价值（Q值）。使用分析结果，对空隙的闭合行为的极限值进行了量化，并且现在可以理解，空隙在大于Q = 0.21时闭合。此外，用田口方法设计了满足上述值的锻造工艺。用田口法预测的Q值与变形分析计算的Q值基本一致。有人澄清说，该过程能够简单地设计。皇冠版权所有（C）2009年出版的爱思唯尔B.V.保留所有权利。
In this Study, the closing behavior of internal voids was examined by a deformation analysis involving the 2-D finite element met hod (FEM), which Simulates voids in steel ingots in the compression process (upset process). In the compression process, a model experiment that uses internal voids was carried out to confirm the accuracy of the deformation analysis. By comparing the model experiment with the analytical results, it was confirmed to simulate the internal void behavior by this analysis. The relationship between the reduction ratio and the void shape/void position was investigated by the analysis. In the forging process, the closing evaluation value of internal voids (Q value) was calculated by a model experiment and 3-D FEM. Using the analysis results, a limit value of the closing behavior of voids was quantified, and it is now understood that the voids close at more than Q = 0.21. In addition, the forging process of filling the above-mentioned Value was designed by the Taguchi method. The predicted Q value ill the case of using the Taguchi method almost corresponds to the value calculated by the deformation analysis. It was clarified that the process is capable of being designed simply. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.