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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    Special 1    September 2009

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Numerical simulation of temperature field in plasma-arc flexible forming of laminated-composite metal sheets
SONG Wen-qing(宋文庆)1, XU Wen-ji(徐文骥)1, WANG Xu-yue(王续跃)1,
MENG Jian-bing(孟建兵)1, LI Hong-you(李洪友)2

1. School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China;
2. College of Mechanical Engineering and Automation, Huaqiao University, Quanzhou 362021, China

Abstract:Flexible forming of laminated-composite metal sheets (LCMS) using plasma arc is a latest technique, which produces LCMS components by thermal stress without mould and external force. Considering that the controllable temperature field is the key during the forming process, a three-layer FEM model, based on the characteristics along LCMS thickness direction, was developed to study the variation rules of temperature field, which was verified robustness by experimental validation. Besides, the influences of process parameters such as plasma arc power, scanning speed and plasma arc diameter on LCMS temperature field were performed. The comparisons of LCMS with single layer metal sheet (SLMS) show the temperature difference of LCMS along thickness direction is smaller than that of SLMS, but the heat-affected zone of LCMS along X axis is wider than that of SLMS under the same process parameters.

 

Key words: laminated-composite metal sheets; plasma arc forming; temperature field; numerical simulation

ISSN 1672-7029
CN 43-1423/U

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