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| Head Forming Mechanism of Rectangular Tube |
| FU Zhi-qiang1,2,DU Feng-shan1,2,3,AN Zi-jun1,DUAN Li-ying1,YU Hui1,YANG Fan1 |
（1. School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China
2. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, Hebei, China
3. National Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China） |
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Abstract The finite element simulation model of a rectangular tube roll forming process based on the specification process was established using a nonlinear finite element method. The actual rectangular tube rolling process of a 7-stand was simulated using this model. The metal flow pattern of the outer and inner layers of a rolling workpiece in the longitudinal direction are obtained by analysis of the distribution of stress, strain and the nodal displacement of the stable section in roll forming process. It was shown that there is a neutral flow plane of displacement in the transition zone of corner and edge of the head of the rolling workpiece with obvious metal inversion and out phenomenon in the center of corner and edge of the head. The simulation results are consistent with the rolling results.
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Received: 23 April 2013
Published: 20 February 2014
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2014, Vol. 49 
