高径厚比超薄壁屏蔽筒反旋压的仿真分析

Xin-he Li, Xiahui He, X. Yang
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引用次数: 0

摘要

针对高径厚比超薄壁屏蔽筒的反向旋压过程,建立了新的有限元简化弹塑性力学模型。轧辊进给方式采用脉动式进料方式,更接近实际工况。此外,这种新的有限元简化模型大大节省了计算时间。本文利用大型有限元分析软件MSC.Marc对金属塑性流场及变形区的应力应变分布进行了研究。分析了工件缺陷产生的原因,并据此确定了金属流动方向的分割点。为高径厚比特薄壁盾构罐的实际加工提供了理论指导。C-276屏蔽层厚度0.42㎜,直径561.5㎜,已成功试制。证明上述分析是合理的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Simulation Analysis on Backward Spinning of Extra thin-walled Shielding Can with High Ratio of Diameter/Thickness
A new FEM simplified elastoplastic mechanical model is constructed for the backward spinning process of the extra thin-walled shielding can with high ratio of diameter/thickness. The feed mode of the roller adopts the pulsing schedule, which is closer to the actual working condition. Additionally, this new FEM simplified model is significant saving in computing time. In this paper, the metal plastic flow field and the distributions of stress and strain of the deformation zone are studied by the large-scale FEM analysis software MSC.Marc. The causes of the defects of the workpieces are interpreted and the dividing point of the flowing direction of the metal is obtained, accordingly. And the theoretical guidance for the actual processing of the extra thin-walled shield can with high ratio of diameter/thickness is provided. The C-276 shielding can with 0.42㎜ thickness and 561.5㎜ diameter is successfully trial-produced. It proves that above mentioned analysis is reasonable.
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