J Shanghai Jiaotong Univ Sci

Journal of shanghai Jiaotong University (Science) ›› 2012, Vol. 17 ›› Issue (4): 465-469.doi: 10.1007/s12204-012-1307-8

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Research and Application of Pre-bending Automatic Control Models of 100 m Rail

Research and Application of Pre-bending Automatic Control Models of 100 m Rail

BAO Xi-rong1 (包喜荣), LIU Yu-yan1 (刘宇雁), LI Ge1 (李革), CHEN Lin1 (陈林) WANG Jian-guo1 (王建国), WU Zhang-zhong2 (吴章忠), TIAN Zhong-liang2 (田仲良)   

  1. (1. Material and Metallurgy School, Inner Mongolia University of Science & Technology, Baotou 014010, Inner Mongolia, China; 2. Rail-Beam Plant of Baotou Iron & Steel, Baotou 014010, Inner Mongolia, China)
  2. (1. Material and Metallurgy School, Inner Mongolia University of Science & Technology, Baotou 014010, Inner Mongolia, China; 2. Rail-Beam Plant of Baotou Iron & Steel, Baotou 014010, Inner Mongolia, China)
  • Online:2012-08-30 Published:2012-11-16
  • Contact: BAO Xi-rong1 (包喜荣) E-mail:goo_006@sina.com

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Abstract: Repeated bending occurs toward the direction of rail head and rail base during the cooling which can lead to significant bending deformation and residual stress after cooling. The longer the rail is, the more obvious this phenomenon is. In addition to cooling function, a kind of cooling bed with a pre-bending process is used in order to solve this problem on 100m rail. The synchronous movements on this cooling bed can be realized by the automatic control system after establishing the mathematical model of bending deformation after rolling. The rail is reversely bent toward the rail base before cooling according to the pre-bending control of the pre-bending curve and is straight after cooling, which can realize the control of the residual stress after pre-bending and straightening. The straightening residual stress is significantly reduced after the pre-bending.

Key words: long rail| pre-bending| mathematical model

摘要： Repeated bending occurs toward the direction of rail head and rail base during the cooling which can lead to significant bending deformation and residual stress after cooling. The longer the rail is, the more obvious this phenomenon is. In addition to cooling function, a kind of cooling bed with a pre-bending process is used in order to solve this problem on 100m rail. The synchronous movements on this cooling bed can be realized by the automatic control system after establishing the mathematical model of bending deformation after rolling. The rail is reversely bent toward the rail base before cooling according to the pre-bending control of the pre-bending curve and is straight after cooling, which can realize the control of the residual stress after pre-bending and straightening. The straightening residual stress is significantly reduced after the pre-bending.

关键词: long rail| pre-bending| mathematical model

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