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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 6    December 2006

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Dynamic explicit FE modeling of hot ring rolling process
WANG Min(王 敏), YANG He(杨 合), SUN Zhi-chao(孙志超), 
GUO Liang-gang(郭良刚), OU Xin-zhe(欧新哲)

College of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China

Abstract: A new FE modeling method of hot ring rolling was presented by solving key technologies such as contact and heat boundary conditions, motion control over guide rolls, and mass scaling. The method has the following features: 1) the elastic-plastic dynamic explicit approach instead of the static implicit approach is adopted to solve the process so as to greatly improve computational efficiency without sacrificing computational accuracy; 2) the coupled thermal-mechanical effect is considered as opposed to the conventional isothermal assumption,which is more practical; 3) in contrast to the simplified 2D or local 3D ring model, the full 3D ring is modeled to simulate the process. Based on the FE modeling method, two cases of hot plain ring rolling are simulated in the FEA software ABAQUS/Explicit. The simulation results are compared with the experimental measurements and the good agreement between them is observed regarding the material flow and the temperature distribution of the ring.

 

Key words: hot ring rolling; dynamic explicit approach; coupled thermal-mechanical; FEM

ISSN 1672-7029
CN 43-1423/U

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