The roll eccentricity in a rolling mill may define the limit of achievable thickness tolerances and thus is subject of interest for the automation equipment in hot rolling mills as well as in cold rolling mills. Today's demand on thickness tolerances less than % require efficient methods for roll eccentricity identification and compensation.
Advanced automation system for Dragon Steel's new hot strip mill Dragon Steel Corporation, ... This new hot rolling mill (figure 1) was designed to produce strip up to 1,880 ... Results of eccentricity control. MPT International 1/2013 Hot rolling Level 2 subsystem consists of two ba
Designing of Hot Strip Rolling Mill Control System: Strip casting using a single roll caster equipped with a scraper: Structural causes of defects in a cast iron mill roll: High speed twin roll casting of 6016 aluminium alloy strip: High speed twin roll caste for aluminum alloy thin strip: 更多...
reversing roughing mills which reduce the thickness of bars to around 30 mm. Then, the strip is further rolled by finishing mills composed of typically six or seven rolling stands. The rolled strip is cooled down by spraying water in a run–out table and coiled by a down coiler. The most important control problems in hot rolling mills are concerned with the thickness, width, shape and mass flow
Industrial Automation Services Pty Ltd IAS is a high technology company specialising in computer control of industrial processes with solutions to automation and control problems in steel/aluminium/rolling mills through consulting and IRTC (international rolling technology course)
Abstract: Most of the steel rolling mills are facing a great problem of large volume of burning losses in reheating furnace. The losses are nearly % to 4%. The losses are nearly % to 4%. Literature review indicates that there is no specific methodology available to control .
Hot Rolling Processes, MultiLevel Poisson Regression, Quality Control, Surface Defects ABSTRACT Severe competition in US steel industry urges quality improvements in hot rolling processes. Surface defects have been a longstanding troubling issue in hot rolling processes due to the ineffectiveness of existing detection methods. This
Poor strip tracking is one of the notorious problems threatening process stability in a hot strip mill. These issues often lead to tail pinching and in the worst cases even to cobbles. The main pillars of the strategy set out to tackle these issues for the Hot Strip Mills in IJmuiden are rougher mill camber control and finishing mill
Optimization of a Cold Rolling Mill with a High Speed Xray Thickness Gauge Christopher Burnett, Thermo Fisher Scientific, Mount Airy, MD, United States White Paper Abstract The high speed production achieved by modern cold rolling mills requires reliable and robust thickness sensors. The Automatic Gauge Control (AGC) systems and hydraulic
wall thickness by the mandrel mill, and finished to the prescribed outside diameter by the sizing mill/stretch reducing mill (Fig. 1). In the mandrel mill, the main mill for adjusting the pipe wall thickness, the mandrel bar is inserted into the hollow shell that has been pierced through. As .
The experimental rolling was made at the six stands (F1 to F6) ArcelorMittal Tubarão's hot strip mill. Three parameters for the process of hot strips rolling were chosen, in a 2 3 factorial project: slab thickness, water flow of interstand cooling or ISC (top and bottom) between stands F1/F2 and F2/F3, and applied oil flow in roll gap ...
2) for a defect caused by roll eccentricity, which roll or For instance, after the rolling of a strip, the mill operators rolls produced it. may find that the thickness measured by the Xray gauge at In the context of this paper, some aspects have to be defined the exit of the FHSM is not up to the required quality.
Eccentricity in the rolling cylinders Feedback control is necessary to reduce the effect of these disturbances. Because the roll gap cannot be measured close to the mill stand, the rolling force is used instead for feedback. The input thickness disturbance is modeled as a .
Hot rolling mill In hot rolling mills, long products ( wire rod, pipes, bars, rails, beams) or wide flat products ( sheets, strip) are fabricated by rolling. A hot rolling mill consists of a reheating furnace, a descaling unit, a roller conveyor, a hot mill stand and a cooling bed.
of other problems in a mill such as a power cut, mechanical problems of transportation or in the water cooling system. Problems of this kind can never really be calculated but they have a detrimental effect on
Abstract: This paper proposes the eccentric problem in the coiling process of cold rolling mills. The wavelets multiresolution control method is designed: A wavelets multiresolution controller is introduced in the control cycle of coiling tension control, whose purpose is to acquire the element caused by periodically change of the coiling eccentricity. Then