Application Research For Oil Film Thickness Compensation Control Of Cold Tandem Mill

There is a higher level of control technology on high-quality strip rolling on abroad. Although there is a bigger gap with developed country in our country, it has had a lot of achievements in this field. This article's background is automatically control and hydraulic pressure systematic improvement project of 1450mm five stand cold tandem mill reform of WanDa Stencil plate limited company at Zhangjiagang of Jiangsu Province, studied the influence of the delivery steel thickness cased by supporting oil film thickness of bearing roller in cold tandem mill, researched the control method according to the corresponding compensation of the relative oil film thickness.On the basis various kinds of algorithm of the thickness of oil films, we proposed two kinds of algorithm of the relative oil film thickness. One of them is inserting value algorithm of segment linearization. Oil membrane thickness compensation control theory is discussed in this paper, the roll gap value and variance in the different rolling speed and pressure of an 1450mm five stand cold tandem mill has been gauged. The coefficient of modified Reynolds oil membrane thickness compensation formula is regressed through the least-squares method.The second scheme is relative oil film thickness calculation formulae formula consulting the Reynolds equation puts forward.Drawing to the algorithm of oil film thickness, has created conditions that the corresponding thickness controls algorithms to study.Thickness control system that considering the thickness of the oil film and compensating combined sew inner loop, thickness external loop and the oil film thickness compensates structure.At last, thickness compensation control when roll accelerates and decelerates is study , So oil membrane thickness compensation control isreached, which efficiently improves the strip thickness control accuracy when roll accelerates and decelerates.