Reversible rolling mills are key equipment used primarily for cold rolled strips. It has high precision and control requirements for mechanical, hydraulic and electronic control. The 20-roll mill adopts a split roller seat. The upper and lower roller seats are placed between the arches to place hydraulic cylinders, which are directly pressed by the servo automatic thickness control system. The rolls are arranged in the form of 1-2-3-4 of the upper and lower structures. The indicators have reached international standards.
In recent years, there are newer cold rolled stainless steel plate production lines in China. However, due to the large deformation resistance of stainless steel, alloy steel and the like, most of them are rolled by a reversible multi-roll mill. Usually consists of upper and lower systems, measuring systems, main rolling mill systems, rolling oil filtration systems, oil mist collection systems, main and auxiliary hydraulics, fire protection systems and so on. Regardless of the type of mill, the front and rear equipment and auxiliary systems are roughly the same, all of which are configured for the rolling mill production process. The main rolling mill generally has two categories of 20 rolls and 12 rolls. The 20-roller Sendzimir is currently the most widely used model, and the 20-roll mill also has integral mills and split mills. The 12-roll mill is a type of machine that has been developed in recent years.
Nowadays, steel production continues to increase substantially, continuous production in the whole process, high-speed rolling, and high-precision product quality requirements for high-performance automation systems. The degree of automation directly determines the steel output and the rate of rolling. Therefore, the degree of automation of cold rolling has also increased year by year.
Applying three control methods of thickness control to adjust the thickness of cold-rolled sheet, combined with the automatic flatness control of AFC (Automatic Flatness Control) system of six-roller reversing rolling mills in the production of single-stand rolling mill of cold rolling mill, In view of the requirements of the shape control system required by Cold Rolling Mill, based on the understanding of the design idea of the shape control system, the algorithm of the shape target curve is derived, and the basic target control curve required for the cold rolling production of is developed. A solution to overcome the defects of the plate-shaped rib wave. The analysis and improvement of the unsuccessful strip tail accident and the fault of the strip occurred at the scene, which greatly reduced the accident rate and improved the yield and rolling efficiency of the strip. The practical application shows that the basic automation system of cold rolling has a stable operation and remarkable control effect. The rib wave scheme can overcome the rib wave effect better. In the steady rolling process, the plate shape deviation can be controlled within 10I.