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| Roller Curvature and Straightening Precision on Six and Two-Roller Tube Straightener |
| LIU Zhi-liang1,XUE Yan-jie1,WANG Ying-jie2 |
1. College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China
2. Technique Center, Baoshan Iron and Steel Co., Ltd., Shanghai 210900, China |
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Abstract In order to improve the straightening quality of pipe straightening machine, based on mechanics of materials and metal elastic-plastic theory, the straightening process of ordinary six-roller straightening machine and two-roller straightener was investigated, and both the advantages and the shortcomings of pipe precision straightening was proposed. A new type of composite pipe straightening machine, six and two pipe straightening machine was presented. A roller-shaped curve and its roll graph were analyzed through Matlab, and theoretical ideal roller curve straightening accuracy was also calculated. Finite element model of the 6+2 pipe straightening machine was built using the finite element software Marc, and the entire straightening process was simulated. On basis of theoretical analysis and numerical calculation, a certain original curvature of the pipe after the straightening of straightness and roundness was analyzed to prove a leveler straightening ability. A new straightening machine was present to improve the quality of pipe straightening.
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Received: 26 June 2012
Published: 21 March 2013
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2013, Vol. 48 
