In steel rolling industry, control of hot metal rolling process plays an important role in assuring high product quality and safe process operation. Although many advanced looper control technologies for finishing rolling process have emerged, looperless interstand tension control of roughing rolling mills remains a challenging problem.
Tension control method for a rolling mill , · In the control of the tension of a workpiece which is rolled by a tandem rolling mill, a tension control method for a rolling mill wherein the tension of a. DEB4 Control apparatus and.
The problem is that when the cold mill reduces thickness in one area, it also elongates that area in the rolling direction. Trying to control length differential (shape) and thickness differential (profile) at the same time is asking a lot. It is optimal to let the rolling mill do what it does best—control the profile.
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This paper presents roll force control methods to be used with the predictive force setup model of the finishing stands in a hot steel rolling mill. Current mill practices achieve a desired strip gauge by using a predictive force model to setup the roll gaps on the finishing stands.
rolling mill process in order to maximize throughput and minimize cost and crop losses. He applied computational Intelligence based optimization for the first time to the rolling schedule of tandem cold rolling mill. Rolling schedule is a set of multiple rolling parameters such as reduction, roll force, torque, rolling speed and tension.
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Abstract—The role of a hot rolling mill process is to produce strips of thickness about ∼ 20 mm from heated slabs. One of the major control problems in hot rolling mills are the looper and tension control loops because these have a significant impact on the dimensional quality of a strip and process stability.
Dec 29, 1981· The invention relates in general to interstand tension control apparatus for a rolling mill, and more particularly to looper control apparatus in a tandem or continuous hot strip rolling mill. The looper is a mechanism installed between any two stands, in a tandem mill installation.
ACKNOWLEDGEMENTS Thismanualhasbeenpreparedwithinformationandassistance fromTheAluminumAssociationandmembercompaniesrepresented ontheSheetandPlateDivision ...
Analog Tension Control The MCS204 is a solidstate control designed for manual or analog input to operate one or two 24 VDC tension is designed for use with the MCS166 power supply. See page 47. n Input 24–28 VDC 3 amps n Operates from torque adjust control knob
the speed of the drive mill motor. Of the control systems that can directly or indirectly influence the specifications of the HSMP, the looper control system, whose controlled outputs are the strip tension and looper angle, is a key subsystem for the safe rolling process and stable strip quality. Strip tension control is
tension control. AdviseIT for Cold Rolling Mills: for monitoring and diagnosis of strip thickness and flatness quality. 2 1 Cold rolling of flat metals products involves controlling a multivariable process with couplings, which is subject to significant disturbances and parameter drift. 1 Advanced Mill Control Entry thickness variation
2019 JUN 28 By a News ReporterStaff News Editor at Chemicals Chemistry Business Daily Business Daily Daily According to news reporting originating from Alexandria, ia, by NewsRx ...
Reducing the roll gap increases the roll pressure to p3. Gage control in multiple rolling mills is achieved through measurement of strip thickness using xray gage and adjusting the strip tension using feedback control system. Rolling defects: Mill spring is a defect in which the rolled sheet is thicker than the required thickness because,
PURPOSE:To control a tension leveler so as to maintain an L camber within a permissible range and to improve yield by adjusting automatically an intermesh, deflector roll gap and elongation percentage during passing of a strip. CONSTITUTION:The plate thickness signal 9 detecting 8 the plate thickness of a strip 8, the speed signal 10 detected with a speed detector 10 and the tension signal 18 ...
In this paper, the unified gaugetension control problem is formulated by defining the exit strip thickness of stands and interstand tensions as controlled outputs. It is shown that cold rolling process can be described by a nominal model perturbed by an additive uncertainty.
An improved method for automatic tension control is developed. It involves combining speeddifference tension control during free rolling and staticcurrent tension control during multistand rolling on three stands. A functional block diagram of the system implementing the method is considered.
The invention relates to method for arranging a pile (2) on a vessel (1) using one or more cranes (6, 7) and a pile moving arrangement (13) having a cable (9) releasably connected to one of the pile ends for moving the pile on the support surface, by means of rolling, wherein the cable is kept under tension during the rolling of the pile ...
Constant tension control between stands in hot rolling process is essential to enhance the quality of steel. Sensorless tension control is under research by some advanced companies to replace the conventional tension control method because in continuous finishing mill process, it is impossible to install the looper used in conventional control
rolling mill and rollerleveler while first imposing on it very high tension. Many diverse solutions have been chosen to apply high continuous tension on the strip by the use of two groups of bridle rolls. The oldest and simplest method is by rigid gearing between the
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This paper proposes a fuzzy interstand tension control scheme for roughing and intermediate rolling mills to deal with the first problem mentioned above. The proposed scheme detects the changes in the motor current and corrects the motor speed of the upstream stand based on approximate human reasoning to remove speed mismatch.
OUTLINE OF REVERSING COLD ROLLING MILL Outline of reversing cold rolling mill and rolling method As illustrated in Figure 1, a reversing cold rolling mill is structured mainly of a mill proper, a winding machine (payoff ree l), an entry winding machine (tension reel) and a deliverywinding machine (tension .
Abstract: Automatic Tension Control (ATC) system is important for the cold tandem mill rolling of steel. Controller parameters must be adjusted continually according changing plant parameters to obtain better control performance. So it is very difficult to maintain strip tension within a .