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Oct 06, 2020 Shape and Gauge Control of Strip in a Cold Rolling Mill. satyendra; October 6, 2020; 1 Comment ; AFC, AGC, GBC, GFG, GMC, HGC, reversing mill, SC, tandem mill, TCG, TCS, TCT, Shape and Gauge Control of Strip in a Cold Rolling Mill. The economic efficiency of metal rolling processes is strongly correlated to the quality level of the end-rolled ...
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Jun 01, 1996 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.
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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 ...
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Sep 01, 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.
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ZR 21-AN mill section with a very small diameter work roll (65 mm). The net result was that the mill was able to take reductions of over 20% per pass on austenitic stainless steel and to keep the strip shape sufficiently flat to obtain good rolling. There are three other ways to add crown control
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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 ...
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Jul 19, 2017 Shape is an important quality index of cold rolling strip. Up to now, many problems in the shape control domain have not been solved satisfactorily, and a review on the research progress in the shape control domain can help to seek new breakthrough directions. In the past 10 years, researches and applications of shape control models, shape control means, shape detection technology, and shape ...
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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 ...
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description of the cold rolling process is presented. In Section 3, a mathematical model has been driven for sin-gle-stand cold rolling mill. In Section 4, architecture and learning algorithm Fuzzy Neural Networkof have been presented. In Section 5, thickness control with roll ec-centricity compensation has been proposed. In Section 6,
Read Moreexample), 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, Chemical Engineering ...
Read MoreJul 19, 2017 Shape is an important quality index of cold rolling strip. Up to now, many problems in the shape control domain have not been solved satisfactorily, and a review on the research progress in the shape control domain can help to seek new breakthrough directions. In the past 10 years, researches and applications of shape control models, shape control means, shape detection technology, and shape ...
Read MoreIt 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 ...
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Flatness control in rolling processes is widely used for steel and nonferrous metals, such as aluminum and copper. We developed a shape roll by applying the principle of pneumatic bearing and supplied the first flatness control system (hereinafter called IHI Sheetflat) to an aluminum cold rolling mill in 1985.(1)
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mechanics. With the need for higher quality and productivity in cold strip mill, mathematical models of cold rolling of a strip with a desired shape and dimension, both for mill set-up and for on-line control, have become a key issue in the steel rolling process. One major part of these models concerns the strip and roll deformation ...
Read Moredescription of the cold rolling process is presented. In Section 3, a mathematical model has been driven for sin-gle-stand cold rolling mill. In Section 4, architecture and learning algorithm Fuzzy Neural Networkof have been presented. In Section 5, thickness control with roll ec-centricity compensation has been proposed. In Section 6,
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Fig 2, Heat Migration in Cold Mill Work rolls (Hotter regions shown in red) This localized heat input / output process results in a non-uniform distribution of heat, circumferentially around the roll and transversely across the roll body. Additionally the roll is subjected to Thermal and
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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.
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As illustrated in Figure 1, a reversing cold rolling mill is structured mainly of a mill proper, a winding machine (pay-off ree l), an entry winding machine (tension reel) and a delivery-winding machine (tension reel). There are many cases in which a shearing machine for dividing a strip is installed on the delivery side of the mill, and also a ...
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cast slabs into plate, the plate into hot rolled coils and the hot rolled coil into cold rolled coil. Many of these old mills are still running today as a result of upgraded electrical and hydraulic systems, including hydraulic screwdowns, hydraulic roll bend, and tension control.
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Oct 10, 2002 With new automatic gauge control (AGC) technology, the mills are doing much better, but perfection remains an elusive goal. At the Cold Mill. At the cold mill, every time we change the thickness profile, we also change the flatness. The cold mill roll gap should start out being set to the same profile as the crown of the incoming hot mill product.
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Every aspect of JSW PLTCM is designed to add precision and quality control to the cold rolled process. In this, pickling line is linked with cold rolling mill, which provides better shape control, delivers significant improvements with regard to mill productivity, yield, and production as a result of the elimination of strip threading and ...
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In the aspect of the shape control means, the researches in the past focus on the roll optimization, mill type selection, process optimization, local strip shape control, edge drop control, and so on.
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The present invention has been invented to solve the problems in the prior art as described above, by supplying accurate data of the cold rolled steel sheet to the control of the rolling thickness of the mill stand to eliminate the thickness deviation along the width direction, by using a shape control program It is an object of the present ...
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This ensures that shape can be closely monitored through the entire pass schedule in both directions and results in excellent shape control. COLD REVERSING TEMPER MILL (CRTM) The CRTM is identical to the CRM in every respect except that it can temper roll as well as cold roll.
Read Moremechanics. With the need for higher quality and productivity in cold strip mill, mathematical models of cold rolling of a strip with a desired shape and dimension, both for mill set-up and for on-line control, have become a key issue in the steel rolling process. One major part of these models concerns the strip and roll deformation ...
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Shape (or flatness) control for rolled steel strip is becoming increasingly important as customer requirements become more stringent. Automatic shape control is now more or less mandatory on all new four-high cold mills, but no comprehensive scheme yet exists on a Sendzimir mill. This is due to the complexity of the control system design on such a mill, where many more degrees of freedom for ...
Read MoreThe present invention has been invented to solve the problems in the prior art as described above, by supplying accurate data of the cold rolled steel sheet to the control of the rolling thickness of the mill stand to eliminate the thickness deviation along the width direction, by using a shape control program It is an object of the present ...
Read MoreIn the aspect of the shape control means, the researches in the past focus on the roll optimization, mill type selection, process optimization, local strip shape control, edge drop control, and so on.
Read MoreOct 10, 2002 With new automatic gauge control (AGC) technology, the mills are doing much better, but perfection remains an elusive goal. At the Cold Mill. At the cold mill, every time we change the thickness profile, we also change the flatness. The cold mill roll gap should start out being set to the same profile as the crown of the incoming hot mill product.
Read MoreWith the publication of this book, newcomers to the field of steel rolling have a complete introductionto the cold rolling process, including the history of cold rolling, the equipment currentlyin use, the behavior of the rolling lubricant, the thermal and metallurgical aspects of the subject, mathematical models relating to rolling force and power requirements, strip shape, and thefurth er ...
Read MoreThis ensures that shape can be closely monitored through the entire pass schedule in both directions and results in excellent shape control. COLD REVERSING TEMPER MILL (CRTM) The CRTM is identical to the CRM in every respect except that it can temper roll as well as cold roll.
Read MoreAs illustrated in Figure 1, a reversing cold rolling mill is structured mainly of a mill proper, a winding machine (pay-off ree l), an entry winding machine (tension reel) and a delivery-winding machine (tension reel). There are many cases in which a shearing machine for dividing a strip is installed on the delivery side of the mill, and also a ...
Read Morecast slabs into plate, the plate into hot rolled coils and the hot rolled coil into cold rolled coil. Many of these old mills are still running today as a result of upgraded electrical and hydraulic systems, including hydraulic screwdowns, hydraulic roll bend, and tension control.
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3 The shape of the plate is bad, and a large side wave appears, so that the steel strip exceeds the photoelectric tube control limit; 4 The operation is improperly adjusted, the shrinkage of the reel is small, and when the pusher rolls out the steel coil, the inner ring is pulled out.
Read MoreAND SHAPE OF COLD ROLLED STRIP. ABSTRACT Various experimental methods have been used to show the effect of different Sendzimir mill rolling parameters on stainless steel strip shape. Experiments using sister coils, noting the effects of change over a number of coils, and using the "Taguchi" statistical
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The UCM-Mill for copper and copper alloys features small work rolls (WR) combined with shape control functions consisted of WR bending, intermediate roll (IMR) bending, IMR shift using all straight uncambered rolls and a spot cooling system. Rolling of hard and thin material with excellent shape control is realized in the UCM-Mill.
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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. Box annealing and absence of scale permit stamping and moderate drawing operations.
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02 Magadh has wide range of Cold rolling mills to suit 02 varied application and requirements. 4 HI MILLS 20 HI MILLS 6 HI MILLS GAUGE SHAPE CONTROL SYSTEMS TENSION REEL MANDRELS DISCLAIMER PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
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