4 hi cold rolling mill pdf file

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. Cuttingedge coldrolling mills primetals technologies. Modern rolling practice can be attributed to the pioneering efforts of henry cort of funtley iron mills, near fareham, england. Our technologically developed 4 hi cold rolling mills are used for shaping large pieces of metals such as billets, blooms and slabs. You benefit from our 20high mills because they are packed with stateoftheart mechanics, hydraulics, electrics, and automation. This condition often occurs in the rolling of steels and hightemperature alloys. That produce high rate of production more than rate of production more than two high roll methods. Cambering of four high cold mill with the view of reducing. 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.

Hot rolling is often characterized by a condition called sticking, in which the hot work surface adheres to the rolls over the contact arc. Cold rolling mill facility for steel coil and sheet. You have clicked a page that seems to be very popular. Thyristor converters for 160 kw pusher drives for preheating furnace. Mainly used for rolling low carbon steels, its also a great solution for advanced grades such as silicon steels. 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. Carbon steel 6 hi cold rolling mill, hydraulic pressure down cold rolling machine. Characteristics of rolling mills with roll shifting article pdf available in iron and steel technology 6512. In metalworking, rolling is a metal forming process in which metal stock is passed through one. 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 4 high mill stand, the utilization range is wider.

We have engineered and installed wide range of cold rolling mills, skin pass mills as well as bonding mills. Our inhouse cold reduction mills enables us to offer strip quality capabilities in close tolerance of thickness, temper and finish. Sunrise mill, surabaya, indonesia scope of supply puchpull pickling line, extendable to 600. Main pulpit of tandem cold rolling line, ternium, mexico. Four high temper mill nonreversible direction left to right manufacturer waterbury farrel usa yom 1978 model serial number 50305 mill motor power 373 kw controls ge siltrol plus cold rolled strip crs coil weight max. Strengths and benefits of the 6 high cold rolling mill. Four high rolling mill on sales quality cold rolling mill. High speed cold rolling mill backup rolls shapedsteel rolling mill cold rolling mill backup rolls hot rolling mill backup rolls oil seal ys features. Multiroll cold rolling mills are used to process high grade steel strip and nonferrous metal strip. Multiroll cold mill stands are described using different terms depending on their type and manufacturer. Due to government environmental protection and deproductivity action, a lot of good machines are stopped, we can find you second hand rolling mills with good condition and.

Rigid 20 high cold rolling mill machinery, high precision stainless steel rolling mill. Used 1250 mm 6 hi cold rolling mill 87 views posted on 20170105 09. The homogeneous thickness and high surface quality is maintained at 6 hi reversing mill with the help of afc and agc systems. Waterbury farrel 2hi4hi combination mills may be converted by the removal or insertion of work rolls. So, the emphasis of field breakthrough is how to effectively control the complex wave defects of four high cold mill from the point of roll configuration curves. 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. Depending on your product mix, we can provide the rcm in tailored design, as e. Comparison of 4high and 6high millstand technology in cold. Tcms operate under high load conditions for high strength steels.

It is used for rolling down metal to a size that is smaller than its original form. If you continue browsing the site, you agree to the use of cookies on this website. The diameter of the 4high work rolls amounts to approximately 1. A rolling mill may be modelled as a number of inertial masses coupled by. Hardened temper rolling mill four roller for carbon steel high elasticity. That rolling mill having four horizontal rolls, which two rolls are. Alibaba manufacturer directory suppliers, manufacturers. Consider rolling of a flat plate in a 2 high rolling mill. Click the checkout button below or continue adding machines to the cart.

In section 5, thickness control with roll eccentricity compensation has been proposed. Strip thickness control of cold rolling mill with roll. Review on cold rolling mill roll deformation ijoer. Various mill designs are offered that include 6 high ucms universal crown control mill, zr mills and 12 high cold rolling mills with smalldiameter work rolls for the efficient rolling of materials of high hardness. For mills that use rollers to crush grain or stone, see roller mill. The 2 hi cold rolling mill is used for making stripsheets and helps in improving the strength and forming higher tolerance. Processes are different in nature and in output also. Siemens vai has modelled the rolling process in order to be able to compare the critical rolling parameters and results of 4 high and 6high mill stands in cold rolling tandem mills. Steel coil aluminum coil copper coil your application we also provide high precision cold rolling mill and hot rolling mill you need better cold rolling mill at good price. Yogiji digi sees itself as an authority in cold rolling. The performance of a conventional 4 high mill is not satisfactory in these requirements.

The diameter of the 4 high work rolls amounts to approximately 1. New rolling method of reversing cold rolling mill steel plantech. Twenty rolls reversible sendzimir cold rolling mill payoff max. You benefit from our 20 high mills because they are packed with stateoftheart mechanics, hydraulics, electrics, and automation. These 4high mill rolls are known for its design, robust construction and high efficiency. Oil seal for steel production equipment offices jp jtekt corporation nagoya head office no. Rolled steel equipment stainless steel sheets, cold rolled. Optimization of cold rolling mill process to improve. The resonant frequencies approach each other is clearly crucial in hot mill design. Most steel mills have rolling mill divisions that convert the semi finished casting. With this new design, mills were able to produce 15 times more output per day than with a hammer.

It has capability to treat wide range of strip widths. Agc hydraulic 6 hi cold rolling mill 700mm carbon steel 390m min speed. And, if you want to produce small to medium batch sizes, this mill type is a highly efficient option. 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 ds system is the ideal contactfree way to remove the rolling emulsion from the strip. Salem steel plant salem 20hi sendzimir mill complete replacement of analog drive controllers by digital drive controllers and mill automation system 2000 6. 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. 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. Automatic cold reversible rolling mill 4 hi 650mm agc screw down type. This three high rolling mill used to billet rolling, blooming or finish rolling.

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. 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. In section 3, a mathematical model has been driven for singlestand cold rolling mill. Proceedings of the asme 2014 international manufacturing science and engineering conference collocated with the jsme 2014 international conference on materials and processing and the 42nd north american manufacturing research conference. Pires et al 2006 2 has applied nonlinear simplex optimization method for cold rolling mill process parameters which reports good results. 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 strip press is disposed on the entry. In section 4, architecture and learning algorithm fuzzy neural networkof have been presented. Automatic 2 hi cold rolling mills, rs 5000000 unit, vaid. Report includes feasibility report, profitability analysis, raw materials, break even points, formulations and formula and much more. We have well equipped manufacturing unit where we manufacture these machines in compliance with industrial standards using modern techniques. Characteristics and lineup of ihis nonferrous metal rolling mills. 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.

In 1783, a patent was issued to henry cort for his use of grooved rolls for rolling iron bars. Of discontinuous cold mills pushpull pickling line and cold reversing mill for indonesia client. As well as steel mills, ihi also supplies nonferrous metal rolling mills for aluminum and. What makes the mill so efficient is that you can set the number of passes and the rolling speeds to suit your program. The most common configuration is the single reversing mill. Small 4 high cold rolling mill in operation i2s youtube. Shanghai copper, china has successfully installed millmate. 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. In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. The od of the work rolls is between 208 to 225 mm or 145 to 155 mm. We have worked on countless projects all over the world.

Carbon steel 6 hi cold rolling mill, hydraulic pressure down. Report on best available techniques bat in the german. 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. Lets say you have a sheet of metal originally 18 thick and wish to reduce the thickness to 116. Cold rolling on a 4 hi reversible mill linkedin slideshare. Typical uses for coldrolled steel include metal furniture, desks, filing cabinets, tables. Rolling mill pdf stresses from hertzian pressure in 4 high cold mill back up rolls were measured. The rcm is the allrounder among cold rolling mills. The 4hi mill rolls are fabricated with the high quality raw material. Introduction when sheet is entered between a pair of rolls and any kind of force applied to that sheet, like that generated when making a reduction, the rolls, since they are supported at the roll ends, will bend around the sheet.

Stresses from hertzian pressure in 4high cold mill back up rolls were measured. In the rolling process, elastic deflections of the mill housing, rolls, bearings. Although cort was not the first to use grooved rolls, he was the first to. This machine provides accurate size and output desired by clients and advanced methods of production which directly reflect in higher productivity and reduce the operational cost significantly. A basic understanding of the mechanics of rolling mill rolls file. This permits great versatility of rolling capability on the same mill. Cold rolling mill for stainless steel 4 hi mill to use hr coils project report manufacturing process cost investment required.

Chapter 4 surface finish and friction in cold metal rolling. Cold rolling mill sale steel cold rolling mill machines. In order to prevent whipping of the work rolls, they are supported by means of intermediate. After the first release of this book, i was hoping for more stimulations and proposals for improvements. The rolls are the main tool for the rolling process and the life of the roll is. Dec 11, 2008 small 4 high cold rolling mill in operation.