HC轧机采用中间辊轴向窜动技术,使轧机的横向刚度显著增加,提高了板形控制能力.但由于中间辊轴向窜动后,在工作辊与中间辊、中间辊与支撑辊间形成接触压力峰值,导致轧辊局部磨损及带材表面质量问题.建立了HC轧机板形和断面形状计算模型,研究了支撑辊及工作辊辊型曲线对辊间接触压力分布的影响规律,在此基础上优化了1220HC轧机支撑辊及工作辊辊型曲线.理论计算及工业生产试验表明,在保证轧机板形控制能力前提下,在HC轧机支撑辊及工作辊上采用合适的辊型曲线,可将支撑辊与中间辊问的接触压力峰值降低20%以上,将工作辊与中间辊间的接触压力峰值降低10%以上,从而避免辊间接触压力峰值带来的轧辊局部磨损及相应的带钢表面质量问题.
By the technique of intermediate roll shifting, gap stiffness and the shape controlling ability of HC-mill is improved significantly. But the peak of contact pressure between rolls form when the intermediate roll shifts, which leads local wear of rolls and quality defects of strip. A mathematical model of flatness and profile of strip was estab-lished. The influence of roll's profile on the contact pressure between rolls was studied. The work and back roll's profile of 1220HC mill were optimized. Theoretical calculations show that the peak value of contact pressure be-tween intermediate roll and back roll can be decreased by 20%, and the peak value of contact pressure between inter-mediate roll and work roll can be decreased by 10%. The industrial experiments show that the local wear of rolls and quality defects of strip can be avoided by such an improvement.
参考文献
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