中厚板轧机相对油膜厚度模型的建立

Developing Mathematical Model for Relative Thickness of Oil Film in Support Roll Bearing of Plate Mill

分析了轧制过程油膜厚度变化对钢板厚度控制精度的影响,基于油膜厚度Reynolds计算公式,借鉴轧辊调零计算轧机弹跳的想法,提出相对油膜厚度的计算方法,并在轧机上进行数据采集,得到油膜变化的实测值,通过弹跳曲线的平移处理,得到最终的油膜变化曲线,根据该曲线可很方便地确定模型的结构并拟合出模型系数.利用该模型可以有效地提高加减速阶段的厚度控制精度.

The influence of oil film thickness variation on workpiece gauge control in rolling process is analyzed. Based on the Reynolds＇ formula of oil film thickness by virtue of roll zeroing to calculate stand spring, the relative thickness of oil film is calculated, with the measured values obtained from data acquisition done on some plate mills. Neglecting the effect of stand spring and making curvilinear translation, the oil film thickness variation curve is given as a result by which the model structure and relevant parameters of oil film thickness can be easily determined. The workpiece gauge control precision at both acceleration and deceleration stages can be improved effectively by this model.