Nov 12, 2013· been developed for hot or cold mill processes. The Brit-ish Iron and SteelResearch Association (B1SRA) AGC method based on the gaug meter principle and the feede forward AGC method using the delivery time of the strip have been widely utilized in steel rolling mills [3]. Strip products thickness precision is an important quality parameter.
C OUPLING VIBRATION MODEL FOR HOT ROLLING MILLS AND ITS APPLICATION. JIMIN W U, X IAOQIANG Y AN ISSN P RINT 1392-8716, ISSN O NLINE 2538-8460, K AUNAS, L ITHUANIA 1799 speed at entry and exit, respectively; ö 5, ö 6 and ö á are the strip entry angle, the strip exit angle and the neutral angle, respectively; R å is the roll speed; D Ö is the roll gap spacing along the
Jan 26, 2015· Usually Cold Rolling is done at ambient temperature. Cold rolling is a process of reducing thickness of metallic strips by passingCold rolling is a process of reducing thickness of metallic strips by passing it through rolling mill. The rolling mill consists mainly of rolls drives, bearings, mill-springit through rolling mill.
When rolling steel sheets on hot strip mills, to avoid a temperature drop in the rolled material, it is necessary to pass it through finishing ... Fig. 7 Improvement of gauge accuracy through application of absolute mode AGC Fig. 8 Result of automatic crown set-up control
C OUPLING VIBRATION MODEL FOR HOT ROLLING MILLS AND ITS APPLICATION. JIMIN W U, X IAOQIANG Y AN ISSN P RINT 1392-8716, ISSN O NLINE 2538-8460, K AUNAS, L ITHUANIA 1799 speed at entry and exit, respectively; ö 5, ö 6 and ö á are the strip entry angle, the strip exit angle and the neutral angle, respectively; R å is the roll speed; D Ö is the roll gap spacing along the
Over the years, our steel mill applications has covered the whole steel making production line, from ship unloader, sintering machine, coke ovens, torpedo cars, blast furnaces, BOF (basic oxygen furnaces), EAF (electric arc furnaces), continuous casting machines, furnaces, hot strip mills, plate mills, rolling mills, roughing stands, finishing ...
Either RF-AGC or Mon-AGC of AGC(automatic gauge control) model to the 1580 hot strip rolling mill belongs to a feedback control system.Time lag is therefore inevitable to the readjustment of rolling gap,thus resulting in the constraint on improving the strip gauge precision.The normal feedforward idea about tandem cold mills was introduced into hot strip rolling to develop a feedforward AGC ...
The optimized AGC system was applied successfully in a hot strip mill, and the practical application showed that the thickness of the strip steels with the specification of 3.5 mm was controlled ...
Jun 27, 2008· Abstract: Mill Modulus Control (MMC) is one of important methods on Automatic Gauge Control (AGC) systems of strip rolling mills. It would result in a slower adjusting speed of strip rolling gap to combine the former AGC system and MMC simply without changing the compensating coefficient of rolling efficiency, which was deduced in detail by some inferential reasoning formulas.
4-high rolling mills used for reduction and skinpass at its Hagen, Germany, location. In this case, each mill uti-measurement. The application at each roll mill required a set of two LSVs, one located on either side of the mill. The combina-tion measures strip entry and exit speed for determining elongation or for mass flow calculations.
Because conventional PID controller is difficult to solve the pure lag problem, so the technology of monitor AGC caused in hot strip rolling mills, the control strategy of predicted extrapolation ...
Rolling Of Steel In Hot Strip Mill Ispatguru. 2019-6-12 AGC edger finishing mill hot strip mill Laminar cooling rolling speed scale breaker slab. roughing mill tension Rolling of steel in Hot Strip Mill. Hot strip mills in these days are either conventional hot strip mills or strip mills for rolling thin slabs.
Dec 03, 2015· Rolling of steel in Hot Strip Mill. satyendra; December 3, 2015; 0 Comments ; AGC, edger, finishing mill, hot strip mill, Laminar cooling, rolling speed, scale breaker, slab. roughing mill, tension,; Rolling of steel in Hot Strip Mill. Hot strip mills in these days are either conventional hot strip mills or strip mills for rolling thin slabs.
Waterbury Farrel Automatic Gauge Control (AGC) Systems ensure close-tolerance strip at the push of a button. The system automatically maintains extremely tight gauge tolerances as the strip passes through the mill at up to 1,000 meters per minute. The Waterbury Farrel patented AGC monitors strip gauge and corrects any variation within milliseconds.
The stainless steel type exhibits corrosion resistance in hot environments, such as in direct contact with water or in steamy atmospheres. A special surface treated type is also available. A special treatment is applied to the plate and connecting pins to stop corrosion in its tracks, improving durability and reducing replacement frequency.
Research on application of Smith predictor to monitor AGC in hot strip rolling mills
Spring model is important restrictive factors to improve the precision of AGC control system. To improve the accuracy of strip gauge control, Study on various influencing factors of spring model has important significance in rolling process. Therefore, using ABAQUS finite element software, this paper establishes the whole stand model of strip rolling.
In this paper, we propose an effective mechanical-electrical-hydraulic-interfacial coupling vibration model for hot rolling mills and obtain a practical measure to relieve mill vibration. First, an experiment related to mill modulus control gain in automatic gauge control (AGC) is carried out during manufacturing. Rolling mill vibration is observed to gradually be enhanced with increasing mill ...
Feb 01, 2010· The mathematic model of control object is established based on a monitor AGC system for cold rolling mill. and the model parameters are: material The fuzzy control strategy was brought in normal PID Smith prediction controller. Based on the monitor AGC system of a cold rolling mill. the typical transfer model of controlled device was deduced.
In response to the characteristics of large time delay, nonlinear, various disturbances in Monitor AGC system for cold rolling mill, a control strategy combining Smith predictor with Active Disturbance Rejection Control (ADRC) is proposed. Approximation ability of Extended State Observer (ESO) to estimate unknown parts of controlled plant model is promoted by model compensated ADRC.
Jun 04, 2019· Accurate temperature measurement across the strip during cold rolling mill operations is an important indicator of quality of uniformity, thickness and …
Over the years, our steel mill applications has covered the whole steel making production line, from ship unloader, sintering machine, coke ovens, torpedo cars, blast furnaces, BOF (basic oxygen furnaces), EAF (electric arc furnaces), continuous casting machines, furnaces, hot strip mills, plate mills, rolling mills, roughing stands, finishing ...
S.-B. Tan, M.-W. Bao, and J.-C. Liu, "Research on application of smith predictor to monitor AGC in hot strip rolling mills," in Proceedings of the Chinese Control and Decision Conference (CCDC '09), pp. 4172–4175, Guilin, China, June 2009. View at: Publisher Site | Google Scholar
Mar 16, 2014· The novel GM-AGC system has been applied successfully in a hot strip mill, the application results show that the thickness control precision is improved significantly, with the novel GM-AGC system, over 98.6% of the strip thickness deviation of 3.0 mm class can be controlled within the target tolerances of ±20 μm.
There are two types of processes. One is Hot rolled and another is Cold Rolled. If the strip is rolled after heating the strip above the re-crystallization temperature then it is termed as Hot rolled and if that done in room temperature then it is termed as the Cold rolled.Rolling is a process that is widely used and has very high production.
Thickness precision is one of the most important quality indexes in strip rolling process [2, 3].Monitor automatic gauge control (AGC) based on hydraulic roll gap control system is widely used in modern strip rolling mills [4–7].In monitor AGC system, gauge meter is used to measure strip gauge derivation, which is installed at the delivery side of the finishing mill.