Rolling Mill Shape Control - Control System Design
You are here : Control System Design - Index | Simulations | Shape Control Rolling Mill Shape Control System Description. Cold rolling mills are an abundant source of control problems. Typically, the stand consists of a small diameter work roll and a larger backup roll on each side of the steel strip.
Rolling (metalworking) - Wikipedia
Cold-rolled sheets and strips come in various conditions: full-hard, half-hard, quarter-hard, and skin-rolled. Full-hard rolling reduces the thickness by 50%, while the others involve less of a reduction. Cold rolled steel is then annealed to induce ductility in the cold rolled steel which is simply known as a Cold Rolled and Close Annealed.
Shape control of alloy steel rolled by sendzimir mill ...
1-9-1996 · In order to improve quarter waves occurred in the wide and thin gauged alloy steel rolled by 20-high sendzimir mill, a computer simulation based on the divided element method and an actual cold rolling experiment were carried out. Quarter waves were simulated by elastic deformation analysis of rolls considering bending deformation of back up rolls and the effect of control actuators on ...
Shape Detecting and Shape Control of Cold Rolling …
1-8-2011 · Based on the shape detecting principle and the DSP (Digital Signal Processing) technology, a high-precision shape detecting system of cold rolling strip is developed to meet industrial application. It was successfully used in Angang 1250 mm HC 6-high reversible cold rolling mill. The precision of shape detecting was 0.2 I, the shape deviation was controlled within 6 I after the close loop ...
Difference Between Hot and Cold Rolled Steel | …
The differences between hot rolled steel and cold rolled steel relates to the way these metals are processed at the mill, and not the product specification or grade. Hot rolled steel involves rolling the steel at high temperatures, where cold rolled steel is processed further in cold reduction mills where the material is cooled followed by annealing and/or tempers rolling.
SOLUTIONS FOR ALUMINIUM ROLLING MILLS TECHNOLOGY ...
This mill type can be used for foil roughing applications. Capacities vary and depend on the application, but are usually in the order of 30,000 tonnes per year. MAIN BENEFITS • To ensure an accurate mill setup, our cold rolling mills are based on physical online process models. This plus our fully integrated process control, automation and drive
Strip Thickness Control of Cold Rolling Mill with Roll ...
In the cold rolling process and the precision is strip thickness of cold rolled strips of key quality products. Conventional Automatic roll gap Control (where Gauge, AGC) system used for Automatic correction strip thick-ness accuracy [9]. One of the conventional control strat-egy of …
Control Strategies of Asymmetric Strip Shape in Six …
It is a complicated problem for cold-rolled strip to improve asymmetric strip shape in strip production. A roll system and strip coupled model of six-high cold rolling mill was established with finite element method to estimate the effect of intermediate roll shifting, tilting, symmetric and asymmetric bending technologies on strip profile.
Cold rolling shape defects of stainless steel wide strips
example), when the mill has become cold, several strips must be rolled before the mill gets warm again. Thus, the temperature of the mill is always in flux. This would have no affect on flatness if the changes were equal across the face of the rolls. However, while the heat generated by deformation of Advances in Control, stone Engineering ...
Cold Rolling of Steels – IspatGuru
Cold Rolling of Steels. satyendra; October 8, 2014; 0 Comments ; annealing, Cold rolling, double reduction mill, hot rolling, Pickling, reversing mill, skin pass mill, tandem mill,; Cold Rolling of Steels The primary purpose of cold rolling of steels is to reduce the thickness of the hot rolled steel strips (normally in the range of 1.5 mm to 5 mm) into thinner thicknesses (usually in the ...
Mechanics of Cold Rolling of Thin Strip - IntechOpen
Mechanics of Cold Rolling of Thin Strip Z. Y. Jiang ... Cold rolled thin strip has a wide application in electronic and instrument industries, and its production has always been of major interest to the manufacturers and research ers in the ... mill set-up and for on-line control, have become a key issue in the steel rolling process.
Control Strategies of Asymmetric Strip Shape in Six …
1-9-2011 · It is a complicated problem for cold-rolled strip to improve asymmetric strip shape in strip production. A roll system and strip coupled model of six-high cold rolling mill was established with finite element method to estimate the effect of intermediate roll shifting, tilting, symmetric and asymmetric bending technologies on strip profile. To reduce asymmetric defects of strip shape as much ...
Flatness Control System of Cold Rolling Process with ...
3. Automatic shape control system During rolling, mill roll profile is subject to changes because of deflection and thermal expansion and thereby the shape of the material varies constantly. Conventionally, skilled operators checked the shape and adjusted mill actuators manually to maintain a stable shape. This has been replaced by an automatic
Robust shape control in a sendzimir cold-rolling …
The shape control problem for a Sendzimir 20-roll cold rolling steel mill is characterised by operation over a wide range of conditions arising from roll changes, changes in rolling schedules and changes in material gauge, width and hardness.
Automation for Shape Control in Stainless Cold …
The shape of cold strip for the stainless process has been become issue in quality recently, and hence POSCO developed an automatic control system for strip shape in the sendzimir mill. The strip shape is controlled by As_U roll and first intermediate roll. A shape control system is applied to real plant.
Laser Systems for Automation and Quality Control in Steel ...
Laser Systems for Automation and Quality Control in Steel Mills. LAP Croptimizer Dimension-measurement and Crop ... and cold rolling mills. The system provides: – Width and shape (sables, necking) – Over-all length – Flatness, waviness – Crop shape at front and rear ... – Bar-graph average/range diagram of the last 40 rolled billets for
Aluthai Metals : Cold Rolled
Outstanding shape control (flatness) Cold Rolled Steel is a mill product made with a high degree of gauge accuracy and uniformity of physical characteristics. The smooth deoxidized matte finish gives an excellent base for paint, lacquer and enamel.
Effects of rolling parameters on the shape of cold rolled ...
Effects of Rolling Parameters on the Shape of Cold Rolled Strip. Philip James Benstead A thesis submitted in partial fulfilment of the requirements of the Sheffield Hallam University for the degree of Master of Philosophy. February 1993 COLLABORATING ORGANISATION LEE STEEL STRIP LTD., MEADOWHALL, SHEFFIELD. A TEACHING COMPANY SCHEME PROGRAMME.