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.
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)
. Research and Application of
Pre-bending Automatic Control Models of 100 m Rail[J]. Journal of Shanghai Jiaotong University(Science), 2012
, 17(4)
: 465
-469
.
DOI: 10.1007/s12204-012-1307-8
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