Development and Application of Asynchronous Roll Shifting Strategy of Double Attenuation Work Roll in Hot Rolling

In view of the problems violent crown fluctuation and unstable shape control in endless rolling production line, field measurement results show that abnormal is related to shifting limit position work roll after uneven wear occurs. For this reason, asynchronous strategy developed, which has double attenuation amplitude step. By coupling contour model, thermal model rolls-strip integrated strip calculation whole unit established, causes are revealed theoretically. addition, simulation analysis important parameters working made by using model. The number strips a cycle found be too large or small, not benefited stability due influence crown. A many cycles. When at end smaller, can make difference between adjacent cycles greater, it easier avoid edge area stability. industrial test shows maximum decreases 21.05%, 28.57%, significantly improves control.