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

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 p...

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Bibliographic Details
Published in:Shanghai jiao tong da xue xue bao 2012-08, Vol.17 (4), p.465-469
Main Author: 包喜荣 刘宇雁 李革 陈林 王建国 吴章忠 田仲良
Format: Article
Language:English
Subjects:
Bending
Cooling
Cooling curves
Deformation
Mathematical models
Rails
Residual stress
Straightening
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Summary: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 100 m 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.
ISSN:1007-1172
1995-8188
DOI:10.1007/s12204-012-1307-8