Numerical analysis and optimum design of tension-leveling process with variable roll distance
To investigate the impact of roll distance on the strip leveling process,the theoretical relationship between roll distance,strip curvature,and bending roller load were analyzed.A mathematical model for the SPCC strip leveling process under"two bends and two levelings"based on finite element calculations were established.This model studied the influence of roll distance on the bending roller load and strip elongation,the results show that the roller load and strip elongation decrease with the increase of the roll dis-tance,and the influence of the roll distance on the bending roller load and strip elongation increases with the increase of the insertion a-mount of roll.In the given process parameter space,the control range of strip elongation can be expanded by changing the roll distance.Based on the process design principle of"high tension and small insertion amount",the roll distance design method under the target elon-gation rate control was studied.The process parameters under the design roll distance of 31.1 mm and the production line roll distance of 28.6 mm were compared and analyzed,the research showed that the inlet side tension increased by 18.6％,and the bending roller load decreased by 28.8％.By combining distance with process parameters,the bending roller load was effectively reduced,which is beneficial to prolong the service life of the bending roller system.
tension levelingfinite element calculationroll distancestrip elongationroller loadinsertion amount of roll
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