At one point during the industrial revolution in america, the united states led the world in hot and cold rolling, plate mills, slabbing mills and blooming mills. The sundwig 20high cold rolling mill for production of the widest stainless steel precision strip as well as widest strip made of highstrength carbon steel, copper. In this paper, a real application of opti mal control of a hot rolling mill is presented. Mecon has been a pioneer in the field of consultancy, design, engineering, manufacturing and supply of rolling mills and processing lines. Refer to the tapered roller bearing guide or to your timken. Request pdf intermediate roll contour of 6hi ucm cold rolling mill in order to solve the problem of flatness defects and roll spalling caused by rolling thin gauge strip in the 1 500 mm ucm. Strip faults, due to rolling mill vibration the integrated control process is made to analyse the vibrations which are produced on the work roll chocks and backup roll chocks. They are designed and builttoorder to specifically accomplish an end product or process.
Optimization of cold rolling mill process to improve. Sms group offers various cold roll mill technologies for copper, steel and aluminum like tandem cold mill, 18 hs mill, reversing mill, skin pass mill, single stand cold mill. Used 1250 mm 6hi cold rolling mill 87 views posted on 20170105 09. Single stand 4hi cold mill hand of mill right to left material. One stand and two frames are made from fabricated steel plates. The torque is equal to the product of total rolling load and the effective moment arm. Cold rolling occurs with the metal below its recrystallization temperature usually at room. Cold rolling mill on sales quality cold rolling mill. A new 6high cold rolling mill hereinafter hcmill has been developed in order to solve these shape problems. The top countries of suppliers are china, india, and taiwan, china, from which the percentage of cold rolling mill supply is 98%, 1%, and 1% respectively. Increasing demands on the quality of rolling mill products have led to great efforts to improve the con trol and automation systems of the rolling process.
Feb 10, 2012 crm complex6 high reversible cold rolling mill training manual0 slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Davy mckee manufacturer davymckee new 1989 type of mill. So for life and longterm operating efficiency of the cold rolling mill, it does not do any good. Request pdf intermediate roll contour of 6 hi ucm cold rolling mill in order to solve the problem of flatness defects and roll spalling caused by rolling thin gauge strip in the 1 500 mm ucm. In section 4, architecture and learning algorithm fuzzy neural networkof have been presented. Pdf effect of friction on tandem cold rolling mills chattering. This process of rolling increases the yield strength and hardness of a metal by introducing defects into the metals crystal structure. Rolling mills cold rolling mills metal rolling mills hot rolling mills rolling mill manufacturers india better technologies for brighter tomorrows cold rolling is a process by which the sheet metal or strip stock is introduced between rollers, and then compressed and squeezed. The control of strip position is achieved by appropriately adjusting, for example, the screw setting andor. Many customer will only use cold rolling mill, but forget to make routine maintenance of cold rolling mill equipment during usage process. The history of the sundwig 20high rolling mill begins in the first half of the last century, when sundwig developed a multiroll cold rolling mill in 1930. The main building of the cold rolling plant is arranged nearby the south of the battery limit. Detection of defects on cold rolling mill crm rolls with. Numerical analysis of intermediate roll shiftinginduced rigidity.
With our rich industry experience, we have established ourselves to offer a wide array of cold rolling mill for making strip to our valued clients. Hotrolled, pickled coils are fed into the cold rolling mill from an entry. Thanks to its broad range of cold rolling mills for strip widths from 60 to 2,100 mm. It is used the state space model formulation in the minimization of the strip thickness variations. Reheating furnace x cold stocks are heated to make them soft and thus suitable for rolling. Steel rolling mill plants are very important to the industry. Longstanding experience as a leading supplier of cold rolling mills as a lifecycle partner for cold rolling mills, primetals technologies offers complete solutions and support packages for cold rolling mills that extend from the initial investment idea, to mill planning, layout, engineering and construction, up to turnkey plant installations and fullscale plant modernizations. Automatic cold reversible rolling mill 4 hi 650mm agc screw down type. Report on best available techniques bat in the german. Feasibility study for cold rolling project in eastern cape. Hot rolled coil that are cleaned at the pickling line hrp, is being processed at the cold rolling mill total 700,000 tons annual capacity to reduce the thickness to desired values. With 2%cr, 3%cr, 5%cr material series, we have greatly improved our products both in terms of quality and diversification.
Each stand has vertically stacked rolls that are powered by huge motors to impart high compressive stresses into the strip. A wide variety of cold rolling mill options are available to you, there are 10,182 suppliers who sells cold rolling mill on, mainly located in asia. Cuttingedge coldrolling mills primetals technologies. Crm complex6 high reversible cold rolling mill training manual0 slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. In section 5, thickness control with roll eccentricity compensation has been proposed. The reversing cold rolling mill is used mainly for producing coils of normal carbon steel in emerging countries, and is used for producing small lots of variety. Cold mill tcm,crm steel plantech proposes a cuttingedge tandem cold mill 4hi6hi according to the customers needs. Jul 14, 2014 video of a 4hi cold rolling mill with automatic gauge control, commissioned by mnc. The tandem cold mill vibration known as chatter or rumble is a rolling phenomenon occurring in mills throughout the world.
Cold rolling mills yogijidigi can be your preferred supplier for cold rolling mills starting from planning, engineering, implementation and modernization of your plant. Cold rolling millweb guide design of controllers using various methods testing phase results and conclusion discussion testing of each method. Electrical room of pl, electrical room of rolling mill incl. Intermediate roll contour of 6hi ucm cold rolling mill. This phenomenon causes severe damage for the mill machine and strip quality fig.
Cold rolling is accomplished by processing steel strip through a series of tandem rolling mill stands. Aluminum 3004 and 5017 alloys mill rolling load design 1,500 u. Mill chatter in tandem cold rolling mill is a major rejection to the quality and production of the strips. We have engineered and installed wide range of cold rolling mills, skin pass mills as well as bonding mills. In comparison to a 4high mill stand, the utilization range is wider. Here, after an acceptable section is produced, the slitting operation will start. We can also provide total engineering, including auxiliary equipment such as utility facilities, inspection lines and roll shops. Cold mills are classified into few categories according to their thickness ranges and speeds. Rolling mills cold rolling mills metal rolling mills. Q195, q215, q235, 08a1, 20, low alloy steel plate and so on.
A basic understanding of the mechanics of rolling mill rolls file. The advantages of cold rolling are good dimensional accuracy and surface finish cold rolled sheet can be produced in various conditions. The sixhigh cold rolling mill is more suitable for carbon steel, stainless steel and special steel coil rolling. This type of rolling mill is mainly used in offline applications for cold rolling of soft and medium strip and for a wide range of strip widths. Agc hydraulic 6 hi cold rolling mill 700mm carbon steel 390m min speed. Strengths and benefits of the 6 high cold rolling mill. The 2hi cold rolling mill is a kind of portable type. Stresses from hertzian pressure in 4high cold mill back up rolls were measured years ago, the results were never published, but of high interest also, maybe later.
Apr 28, 2015 thus, it was desired to develop a new type of mill which is capable of controlling the rolled strip shape even with changes in rolling conditions. The diameter of the 6high work rolls amounts to approximately 1. The new rolling mill consists of a coupled pickling linetandem cold mill. Before deciding to implement the slit rolling method to an existing rolling mill it is essential to examine the suitability of this mill for the slit roll ing technology. Our threegroup 20high sendzimir cold rolling mill handles a diverse range of rolling demands. Backed by our extensive experience, we devote much at our focus on process optimization for cold rolling mills.
Metal processing cold rolling mil rolls wide range of tct circular saw blades manufactured by us and is used on stationary as well as flying sawing machines for all types of metals slitting and cutting operation. Pires et al 2006 2 has applied nonlinear simplex optimization method for cold rolling mill process parameters which reports good results. Video of a 4hi cold rolling mill with automatic gauge control, commissioned by mnc. Used 1250mm 12hi reversible cold rolling mill,1set of single stand cold rolling mill and 2 sets of double stands cold rolling mill. Apr 12, 2017 yogiji digi sees itself as an authority in cold rolling. This type of rolling mill is mainly used in offline applications for cold rolling of soft and medium strip and for a wide range. Maintenance of cold rolling mill is related to production quality and equipment life, so during the repair and maintenance work of cold rolled ribbed machine,it. Cold rolling mill on sales quality cold rolling mill supplier. The final chapter explains the purpose of roll pass design to ensure the maximum output at minimum cost as well as to reduce the roll wear to a minimum. In section 3, a mathematical model has been driven for singlestand cold rolling mill. A new 6 high cold rolling mill hereinafter hc mill has been developed in order to solve these shape problems.
The performance of a conventional 4high mill is not satisfactory in these requirements. For over three decades mecon has designed, engineered, supplied and commissioned many hot and cold mills ranging medium to large capacities. In most mill vibration models, either the roll mass is usually limited to vibrate in. Rolling is the process of reducing the thickness or changing the cross section of a long workpiece by compressive forces applied through a set of rolls, as shown in figure 51.
Single stand 4 hi cold mill hand of mill right to left material. The homogeneous thickness and high surface quality is maintained at 6 hi reversing mill with the help of afc and agc systems. Introduction the work and backup rolls in 4high cold rolling mill crm are subjected to arduous service conditions. The six high cold rolling mills is more suitable for carbon steel, stainless steel and special steel coil rolling. The present investigation devises a flatness control strategy for a five. The cold rolling mill supplied by primetals technologies to tangshan.
This book discusses as well the different types of rolls for various rolling mills, including blooming, plate, sheet, sheet bar, small section, heavy product, skin passing, and cold rolling mills. Furnace is lined with several layers of refractory bricks. Cold rolling is a process by which the sheet metal or strip stock is introduced between rollers and then compressed and squeezed. Thus, it was desired to develop a new type of mill which is capable of controlling the rolled strip shape even with changes in rolling conditions. This is the starting point of the hot rolling mill practice. Just a few years later, the first alligatortype 20high rolling mill was built, followed in 1958 by the first 20high rolling mill in sundwig four column sfc design. A comparison of roberts formulation with the experimental method rajinder singh me deptt. The following is one example for the hot rolling mill line, with capacity 10,0000tyear we also could design the whole line from capacity 30000t to 30,0000t. In india now a days mostly 20 hi and 4 hi rolling mills are installed in bi g steel produ ction units.
Strip thickness control of cold rolling mill with roll. In the cold rolling process, a hotrolled coil is made thinner by passing it between two rolls at room. 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 reel. If you continue browsing the site, you agree to the use of cookies on this website. Rolling mills are not a standard machine tool, nor are they built for stock. New rolling method of reversing cold rolling mill steel plantech. Due to different numbers of rollers, the metal coil cold rolling mill is divided into 2 hi, 4 hi, 6 hi, and 12 hi agc. Cold rolling mill rolls, rolling mill rolls manufacturer.
Innovative technologies and customeroriented solutions for all industries. In metalworking, rolling is a metal forming process in which metal stock is passed through one. Optimization of a cold rolling mill thermo fisher scientific. The amount of strain introduced determines the hardness and other material properties of the finished product.
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