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| 5Metal Flow Law of a Circular Tube Into a Rectangular-Tube in Continuous Roll Forming Process |
| FU Zhi-qiang1,2,DU Feng-shan1,2,AN Zi-jun1,DUAN Li-ying1,YU Hui1,YANG Fan1,2 |
1. School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China
2. National Engieering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, Hebei, China |
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Abstract In order to investigate the metal flow law in the process of rectangular tube roll forming, a three-dimensional elastic-plastic nonlinear finite element model of rectangular tube roll forming was established with the actual factory production process. The simulated result by the finite element model is consistent with that of field measurements. The metal flow law is obtained by analyzing the nodal displacements in inner, middle and outer on the long side, short side and corner. The results show that: the metal flow law is not consistent from the outer to the inner layer in the middle section of the thickness direction, and the inconsistency at the long side is more obvious than that at the short side; There exists a large difference in the longitudinal metal flow law of the front, middle and tail in outer layer, and the metal flow law of the outer and the inner layer of the front and the tail is on the contrary. The results provide an important theoretical basis for predicting the final dimensional accuracy and roll forming process parameters.
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Received: 05 September 2013
Published: 28 April 2014
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2014, Vol. 49 
