冷轧铝工作区的混合润滑特性研究

Research on the Mixed Lubrication Characteristics in the Working Zone of Aluminium Cold Rolling

为研究冷轧铝工作区的混合润滑特性,基于平均流量理论建立考虑表面粗糙度的冷轧铝工作区混合润滑模型,并通过相关文献的数据验证模型的正确性。在不同轧制速度、润滑油黏度以及前后张应力条件下对整个工作区内的润滑特性进行分析,研究轧制工艺参数对油膜厚度、接触面积比以及应力分布的影响。仿真结果表明:随着轧制速度的提高,轧制压力有一定程度下降,接触面积比会下降以及油膜厚度会增加;较高黏度的润滑剂可以有效地降低轧制界面摩擦力及轧制力,润滑剂黏度越大,油膜压力越大;施加前后张应力对摩擦力的影响不显著,只会降低施加侧的轧制力。

In order to study the mixed lubrication characteristics in the working zone of aluminium cold rolling,based on the average flow theory,a mixed lubrication model was set up for the aluminum cold rolling work zone in which surface roughness was taken into consideration,and the correctness of this model was verified by data from related literature.The lubrication characteristics of the whole working area was analyzed under the conditions of different rolling speed,viscosity,front tension stress and post tension stress,and the effects of rolling process parameters on oil film thickness,contact area ratio and stress distribution were studied.The results show that as the rolling speed increases,the rolling pressure will decrease to a certain extent,the contact area ratio will decrease and the oil film thickness will increase.The lubricant with higher viscosity can effectively reduce the rolling interface friction and rolling force.The greater the lubricant viscosity,the greater the oil film pressure.The effect of the front and post tension stress on interface friction is no significant and only the rolling force on the corrsponding side is reduced.