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针对通常在研究板带宽度变化对出口板凸度的影响时没有考虑辊系凸度这一因素,应用三维刚塑性有限元法、影响函数法、三维弹性有限元法,开发了一个分析板带热轧过程的分析软件。利用该软件研究了支承辊、工作辊的凸度从-0.5 mm到0.5 mm变化时,板宽的变化对出口带钢板凸度的影响规律。结果表明:支承辊、工作辊凸度为0时,板凸度随板宽的增大呈下开口抛物线分布,峰值拐点对应的板宽约为辊身长度的70%,当工作辊辊凸度由-0.5 mm逐渐增大到0.3 mm时,板凸度的峰值拐点对应的板宽由1 300 mm转变到900 mm,当凸度大于0.3 mm时拐点消失,随板宽的增大板凸度逐渐减少。而支承辊凸度的变化只是影响了出口板凸度值,峰值拐点的位置和辊凸度为0时相同。
In view of the fact that the influence of strip width on the crown of outlet plate is usually neglected, the three-dimensional rigid-plastic finite element method, the influence function method and the three-dimensional elastic finite element method are used to develop an analysis strip Hot rolling process analysis software. The software was used to study the influence of the variation of plate width on the crown of exit strip when the crown of support roller and work roll varied from -0.5 mm to 0.5 mm. The results show that the convexity of the support roller and the working roller is parabolic with the opening width increasing with the increase of the plate width. The width of the plate corresponding to the peak inflection point is about 70% of the length of the roller body. From -0.5 mm to 0.3 mm, the plate width corresponding to the peak inflection point of the plate crown changes from 1 300 mm to 900 mm. When the convexity exceeds 0.3 mm, the inflection point disappears and the plate crown increases with the plate width gradually decreases. The change in the crown of the backup roll only affects the crown value of the exit plate, and the position of the peak knee point is the same as that of the roll crown.