二次冷轧过程变形区油膜厚度模型

为了定量预报二次冷轧过程轧制变形区油膜厚度，结合二次冷轧机组乳化液直喷系统的设备与工艺特点，分析了带钢表面析出油膜、工作辊表面附着油膜的形成机理，建立了一套二次冷轧过程轧制变形区带钢上下表面油膜厚度模型，定量分析了乳化液流量密度、乳化液浓度、乳化液析出距离、轧机入口轧制速度、轧制咬入角、带钢入口变形抗力、后张力、轧制油初始动力黏度、轧制油压力黏度系数对轧制变形区带钢上下表面油膜厚度的影响，并将该模型应用到某1220二次冷轧机组的生产实践，编制出了相应的模型计算软件，实现了二次冷轧过程变形区油膜厚度的预报，为二次冷轧过程润滑性能的控制奠定了理论基础。

Oil Film Thickness Model in Deformation Zones during Double Cold Reduction Rolling

In order to quantitatively predict the oil film thicknesses in deformation zones during double cold reduction rolling, combined with the equipment and technological characteristics of the emulsion direct application systems in double cold reduction mill were analyzed, based on the foundation of the mechanism of the plate-out oil film on strip surfaces and adhesion oil film on work-roll surfaces, a model of oil film thicknesses was established on top and bottom strip surfaces in deformation zones during double cold reduction rolling. And the influences of emulsion flow density, emulsion concentration, emulsion plate-out distance, entry rolling velocity, rolling bite angle, entrance deformation resistance, back tension stress, initial rolling oil dynamic viscosity, rolling oil viscosity pressure coefficient on the oil film thicknesses were quantitatively analyzed on top and bottom strip surfaces in deformation zones. This model was applied to the productions of a 1220 double cold reduction mill with the corresponding model calculation software was compiled. And the prediction of oil film thicknesses in deformation zones during double cold reduction rolling was achieved, which laid theoretical foundation for the control of lubricity during double cold reduction rolling.