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在低辊径-厚度比下,研究摩擦因数在宽展公式中的作用,摩擦因数对展宽的作用主要体现在接触面的粗糙程度。经过5组不同的铅轧实验,获得不同等级的摩擦因数。随着宽厚比、压下率和辊径-厚度比的改变,可以得到不同的名义摩擦因数并应用在相应的公式中。随后提出一个拟合公式,通过与232次实验结果进行比较,验证拟合得到的名义摩擦因数的误差低于12%。通过一定次数的自学习修正,该误差减少至2%以下。最终实现通过可以变化的名义摩擦因数对宽展进行更加精确的预测。在真正的工作环境下使用名义摩擦因数,得到的宽展预测误差也小于2%。在实际生产中验证,得到了一个能够对宽展公式中摩擦因数进行设置的参考和解决方法,从而满足工业生产的应用。
In the low roll diameter - thickness ratio, the study of friction coefficient in the wide spread formula, the role of friction factor on the broadening is mainly reflected in the contact surface roughness. After five different lead rolling experiments, different levels of friction factor were obtained. As the aspect ratio, reduction ratio and roll-thickness ratio change, different nominal friction factors can be obtained and used in the corresponding formulas. Then, a fitting formula is proposed. Compared with 232 experimental results, the error of the fitted nominal friction coefficient is verified to be less than 12%. After a certain number of self-learning corrections, the error is reduced below 2%. The result is a more accurate prediction of the spread through variable nominal friction factors. Using the nominal friction factor in a real work environment, the resulting WID prediction error is less than 2%. In the actual production of verification, a formula that can set the friction factor in the breadth of the formula reference and solutions to meet the industrial application.