Consider rolling of a flat plate in a 2 high rolling mill. Cold rolling mill facility for steel coil and sheet. Cgl visual evaluation and numerical analysis system for blast furnace venus furnace pressure control model mold level control and molten steel flow analysis models. Cold mill tcm,crm steel plantech proposes a cuttingedge tandem cold mill 4hi6hi according to the customers needs. A rolling mill may be modelled as a number of inertial masses coupled by. Erw pipe is manufactured by cold forming, and the seam is welded. A new 6high cold rolling mill hereinafter hc mill has been developed in order to solve these shape problems. The 2hi cold rolling mill are used for rolling of sheets, plates and coils of softer metals like aluminum, copper, brass, lead etc. We have engineered and installed wide range of cold rolling mills, skin pass mills as well as bonding mills. This is only suitable for mass production work, as lower volumes require a quicker change of set up and they will consume a lot of labour and work. Manufacturing by roll forming in a rolling mill received.
Apr 26, 2018 4hi cold rolling mill 1250 mm width 200 mpm yogiji digi. Mechanics of cold rolling of thin strip intechopen. Nov 22, 20 cold rolling using roll coolant emulsion in this crm, cold rolling is done on a mecon weanunited plc controlled 3000 tonsm 4 hi reversible mill. We have manufactured more than 200 such rolling mills ranging from 50 mm width to 2000 mm width running successfully all over india and abroad. We can provide you with equipment best suited to your needs. Crm complex6 high reversible cold rolling mill training manual0 slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The combined pickling linetandem cold mill is a prime example of the newly developed high tech mills and is designed as endless mill for an annual. Cold rolling reduction is an important factor that affects drawability of if steel. A twostand reversing cold mill can deliver capacities between 300,000 ta of thingauge products or 1,000,000 ta and more of thickergauge products.
Rolling mill article about rolling mill by the free dictionary. Mechanics of cold rolling of thin strip 443 where yiw is the vertical deflection of the work roll at element i, gijw, is the influence function for the work roll deflection due to the combined bending and shear forces generated by rolling load, giwf is the influence function for the work roll deflection due to the force generated by the roll bending mechanism, k represents the. 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. Type 2 hi nonreversing cold rolling mill size 16 x 24 wide age 1950s with updates coil i. Alibaba manufacturer directory suppliers, manufacturers. Feb, 2014 artificial marble manufacturing process artificial quartz stone producing machinecuarzo artificial duration. Chapter 4 surface finish and friction in cold metal rolling.
The housing and set of rollers mounted on the machine is known as stand. We engineer these mills to achieve the best investment and lowest operating costs. The reversing cold rollin g mill is used mainly for producing coils of normal carbon steel in emerging countries, and is used for producing small lots of variet y coils of high grade steel or special steel in advanced countries. So that the material can be passed through them all in order. Strip thickness control of cold rolling mill with roll. Metal forming science and practice the flattening rate w is a function of the real area of contact area ratio a and the ratio p y of the mean contact pressure to the plane strain yield stress of the strip, i. The performance of a conventional 4high mill is not satisfactory in these requirements. In a traditional rolling mill rolling is done in several passes, but in tandem mill there are several stands 2 stands and reductions take place successively. Outline of reversing cold rolling mill 1 outline of reversing cold rolling mill and rolling method as illustrated in figure 1, a reversing cold rolling mill is comprised mainly of a mill proper, a winding machine payoff reel, an entry winding machine entry tension reel and delivery winding machine delivery tension reel. All mills are built to customer specifications, with rolls of forged steel, cast steel or chilled cast alloy iron to meet application requirements. In the finishing sections of such lines with rolling speeds of up to 100 ms and higher, rolling is carried out on a single strand. Cluster roll mill a number of rolls are used in conjunction. Hardened temper rolling mill four roller for carbon steel high elasticity.
Cold rolling on a 4 hi reversible mill linkedin slideshare. We can also provide total engineering, including auxiliary equipment such as utility facilities, inspection lines and roll shops. The mills are custom designed depending on the material being rolled, thickness and width requirements, production capacity, mode of operation and other inputs. Designed for hot or cold rolling of ferrous and nonferrous metals, these 2 hi mills are ideal for breakdown, run down, tempering and skin pass operations.
Optimization of cold rolling mill process to improve. This phenomenon causes severe damage for the mill machine and strip quality fig. Sbq3, best, and h3 are the latest technologies applied to production processes for special bar quality, special steel, commercial steel bars, and high speed wire rod rolling mills. Report on best available techniques bat in the german. We maintain all international norms and quality check specification for all our 2hi mill rolls which has enabled us to be. Pdf characteristics of rolling mills with roll shifting. The diameter of the 4 high work rolls amounts to approximately 1.
Mill has all the capability and capacity to produce cold rolled sheet of practically table top flatness. It has been observed that increasing cold rolling reduction increases the r m value, at least up to 90% 34. Cold rolling mill on sales quality cold rolling mill supplier. A basic understanding of the mechanics of rolling mill rolls file. Report on best available techniques bat in the german ferrous metals processing industry final draft deutschfranzosisches institut fur umweltforschung dfiu frenchgerman institute for environmental research university of karlsruhe th o. Perhaps the most important parameters in the production of a strong 111 recrystallization texture are the annealing temperature and the. Ppt rolling mill powerpoint presentation free to view. Strengths and benefits of the 6high cold rolling mill. The supply focuses on 2 high rolling mills, high capacity 4 high reduction rolling mills, and inline skin pass mill. Mecon has been awarded the prestigious national award for technical excellence 2000 for development of 6 hi cold rolling mill in india by department of scientific and industrial research dsir, government of india. The hot rolling process california steel industries. They can be equipped with load cells to tell the separating force and hydraulic or mechanical screw downs, depending if it is hot or cold rolling. These machines surpass strict quality tests, thus high performance and optimum functionality are assured. Thus, the steel is highly workhardened, and exhibits a high resistance to denting, etc.
Flexible, lowcost rolling of a wide range of products, especially for small order lots. You have clicked a page that seems to be very popular. The worlds first 4 high continuous hot strip steel rolling mill, which made it possible for width and gauge ratios to be increased from 250. Main benefits of primetals technologies reversing cold mills. The rcm is the allrounder among cold rolling mills. If you continue browsing the site, you agree to the use of cookies on this website. The critical point at this stage of the process is to maintain uniform and precise flatness throughout the entire length of the coil. Siemens vai has modelled the rolling process in order to be able to compare the critical rolling parameters and results of 4high and 6high mill stands in cold rolling tandem mills. Mainly used for rolling low carbon steels, its also a great solution for advanced grades such as silicon steels. Thanks to its broad range of cold rolling mills for strip widths from 60 to 2,100 mm, andritz metals has been one of the preferred cold rolling technology suppliers for decades. 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, as well as for breakdown rolling in offline applications. 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. Comparison of 4high and 6high millstand technology in cold.
Stresses from hertzian pressure in 4 high cold mill back up rolls were measured years ago, the results were never published, but of high interest also, maybe later. Since the product is supplied directly after cold rolling without further. Twenty rolls reversible sendzimir cold rolling mill payoff max. Cold rolling mill for aluminium sheet high impact factor. Sunrise mill, surabaya, indonesia scope of supply puchpull pickling line, extendable to 600. As the name suggests the 4 hi mill employs 4 rolls, two these are the work rolls and the other two are the backup rolls. And, if you want to produce small to medium batch sizes, this mill type is a highly efficient option. Rolling mill design pdf stresses from hertzian pressure in 4 high cold mill back up rolls were measured. A free powerpoint ppt presentation displayed as a flash slide show on id. Tandem mills can be either of hot or cold rolling mill types.
Our offered 4 hi cold rolling mill is popular in the market due to its easy installation, rust proof finish and long functional life. In comparison with their suitability for high rolling speeds of up to 40 ms, they have high load carrying capacity. Yogiji digi sees itself as an authority in cold rolling. Agc hydraulic 6 hi cold rolling mill 700mm carbon steel 390m min speed. Improvement of accuracy for gauge and elongation control. In this types of rolling mill, it includes of a number of nonreversing two high rolling mills provide one after other. Fourhigh rolling mills can be put in tandem, two to seven stands, instead of a reversing mill. Pires et al 2006 2 has applied nonlinear simplex optimization method for cold rolling mill process parameters which reports good results. These 4high mill rolls are known for its design, robust construction and high efficiency. In that mill, the thickness of the material is reduced and being uniform by each pass. Generally, the rolling reduction ratio is 50% to 90%.
Rigid 20 high cold rolling mill machinery, high precision stainless steel rolling mill. Of discontinuous cold mills pushpull pickling line and cold reversing mill for indonesia client. In section 4, architecture and learning algorithm fuzzy neural networkof have been presented. All photos and drawings mentioned are at the back of this book. In section 3, a mathematical model has been driven for singlestand cold rolling mill. One of its key products is high strength cold strip for the automotive industry. The stand type of it is four high cold rolling mill. Characteristics of rolling mills with roll shifting article pdf available in iron and steel technology 6512. Two high rolling mill rolling is a bulk deformation process in which the thickness of the work is reduced by compressive forces exerted by two opposing rolls. In section 5, thickness control with roll eccentricity compensation has been proposed. Danieli morgardshammar long product rolling mills danieli.
Cold rolling mills yogijidigi can be your preferred supplier for cold rolling mills starting from planning, engineering, implementation and modernization of your plant. The resonant frequencies approach each other is clearly crucial in hot mill design. Tandem roll mill continuous arrangement of rolls are used for continuous rolling. Cold rolling using roll coolant emulsion in this crm, cold rolling is done on a mecon weanunited plc controlled 3000 tonsm 4 hi reversible mill. The diameter of the 4high work rolls amounts to approximately 1. Cold rolling mills for steel and nonferrous metals include 1 sheet mills for piece work rolling, 2 wideband sheet mills for reel rolling, 3 strip rolling mills for rolling strips 1 mm to 4 mm thick and 20 to 600 mm wide, the strips then being coiled or reeled, 4 foil rolling mills for rolling bands less than 0. 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.
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. Rolls or rolling mills is a cylindrical shape of roll used in rolling process. The 4hi mill rolls are fabricated with the high quality raw material. The material is rolled both in forward and return in three high rolling mills. 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. 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. In india now a days mostly 20 hi and 4 hi rolling mills are installed in bi g steel produ ction units. In comparison to a 4high mill stand, the utilization range is wider. Novelis operates a variety of types and sizes of cold roll mills at locations around the world, including some that run at exit speeds as high as 3,000 meters per minute.
As a large supplier of used steel mill equipment, we have worldwide sources available for bar mills, rod mills, rolling mills, reversing cold mills, rail mills, plate mills and hot strip mills. Planetary roll mill rolls are arrangement in the form of planetary movement. Used 1250mm 12hi reversible cold rolling mill,1set of single stand cold rolling mill and 2 sets of double stands cold rolling mill. Automatic cold reversible rolling mill 4 hi 650mm agc screw down type. At first, it passes forward through the last and second roller and then comes back through the first and second roller.
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