The 2 hi cold rolling mill is used for making stripsheets and helps in improving the strength and forming higher tolerance. Cambering of four high cold mill with the view of reducing. Our technologically developed 4 hi cold rolling mills are used for shaping large pieces of metals such as billets, blooms and slabs. Used 1250 mm 6 hi cold rolling mill 87 views posted on 20170105 09. Characteristics of rolling mills with roll shifting article pdf available in iron and steel technology 6512. Pdf characteristics of rolling mills with roll shifting. 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. Yogiji digi sees itself as an authority in cold rolling. Agc hydraulic 6 hi cold rolling mill 700mm carbon steel 390m min speed. The performance of a conventional 4 high mill is not satisfactory in these requirements.
Oil seal for steel production equipment offices jp jtekt corporation nagoya head office no. Thyristor converters for 160 kw pusher drives for preheating furnace. The od of the work rolls is between 208 to 225 mm or 145 to 155 mm. Strip thickness control of cold rolling mill with roll. Consider rolling of a flat plate in a 2 high rolling mill. Hot rolling is often characterized by a condition called sticking, in which the hot work surface adheres to the rolls over the contact arc. Chapter 4 surface finish and friction in cold metal rolling. And, if you want to produce small to medium batch sizes, this mill type is a highly efficient option. That produce high rate of production more than rate of production more than two high roll methods. We have worked on countless projects all over the world. 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 the rolling process, elastic deflections of the mill housing, rolls, bearings.
Strengths and benefits of the 6 high cold rolling mill. Comparison of 4high and 6high millstand technology in cold. A rolling mill may be modelled as a number of inertial masses coupled by. In section 3, a mathematical model has been driven for singlestand cold rolling mill. Waterbury farrel 2hi4hi combination mills may be converted by the removal or insertion of work rolls. 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.
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. Carbon steel 6 hi cold rolling mill, hydraulic pressure down cold rolling machine. 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. Carbon steel 6 hi cold rolling mill, hydraulic pressure down. Four high rolling mill on sales quality cold rolling mill. Rigid 20 high cold rolling mill machinery, high precision stainless steel rolling 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. 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. Stresses from hertzian pressure in 4high cold mill back up rolls were measured. Shanghai copper, china has successfully installed millmate. Automatic cold reversible rolling mill 4 hi 650mm agc screw down type. The diameter of the 6high work rolls amounts to approximately 1. That rolling mill having four horizontal rolls, which two rolls are.
Small 4 high cold rolling mill in operation i2s youtube. Optimization of cold rolling mill process to improve. You benefit from our 20 high mills because they are packed with stateoftheart mechanics, hydraulics, electrics, and automation. New rolling method of reversing cold rolling mill steel plantech. Depending on your product mix, we can provide the rcm in tailored design, as e. Modern rolling practice can be attributed to the pioneering efforts of henry cort of funtley iron mills, near fareham, england. What makes the mill so efficient is that you can set the number of passes and the rolling speeds to suit your program. Cold rolling mill facility for steel coil and sheet. Alibaba manufacturer directory suppliers, manufacturers. We have engineered and installed wide range of cold rolling mills, skin pass mills as well as bonding mills. Rolling mill pdf stresses from hertzian pressure in 4 high cold mill back up rolls were measured.
This permits great versatility of rolling capability on the same mill. In metalworking, rolling is a metal forming process in which metal stock is passed through one. Multiroll cold rolling mills are used to process high grade steel strip and nonferrous metal strip. High speed cold rolling mill backup rolls shapedsteel rolling mill cold rolling mill backup rolls hot rolling mill backup rolls oil seal ys features.
Dec 11, 2008 small 4 high cold rolling mill in operation. Automatic 2 hi cold rolling mills, rs 5000000 unit, vaid. Tcms operate under high load conditions for high strength steels. 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. Rolled steel equipment stainless steel sheets, cold rolled. 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. 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. 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. The diameter of the 4 high work rolls amounts to approximately 1. 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. Twenty rolls reversible sendzimir cold rolling mill payoff max. In section 4, architecture and learning algorithm fuzzy neural networkof have been presented. You have clicked a page that seems to be very popular. Sms group website plants all plants reversing cold mills steel. After the first release of this book, i was hoping for more stimulations and proposals for improvements. Hardened temper rolling mill four roller for carbon steel high elasticity.
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. Report on best available techniques bat in the german. In order to prevent whipping of the work rolls, they are supported by means of intermediate. 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.
In comparison to a 4 high mill stand, the utilization range is wider. The resonant frequencies approach each other is clearly crucial in hot mill design. Lets say you have a sheet of metal originally 18 thick and wish to reduce the thickness to 116. Cuttingedge coldrolling mills primetals technologies. The rcm is the allrounder among cold rolling mills. It has capability to treat wide range of strip widths. 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. 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. Cold rolling mill sale steel cold rolling mill machines. Sunrise mill, surabaya, indonesia scope of supply puchpull pickling line, extendable to 600.
Salem steel plant salem 20hi sendzimir mill complete replacement of analog drive controllers by digital drive controllers and mill automation system 2000 6. Andritz metals portfolio of mill stand types for cold rolling. The rolls between which the cold rolling actually takes lace is called the work roll. Click the checkout button below or continue adding machines to the cart. 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 homogeneous thickness and high surface quality is maintained at 6 hi reversing mill with the help of afc and agc systems. You benefit from our 20high mills because they are packed with stateoftheart mechanics, hydraulics, electrics, and automation. 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.
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. Cold rolling mill for stainless steel 4 hi mill to use hr coils project report manufacturing process cost investment required. A new 6high cold rolling mill hereinafter hc mill has been developed in order to solve these shape problems. Report includes feasibility report, profitability analysis, raw materials, break even points, formulations and formula and much more. Surface finish and friction in cold metal rolling where. The diameter of the 4high work rolls amounts to approximately 1.
Typical uses for coldrolled steel include metal furniture, desks, filing cabinets, tables. 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. 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. The 4hi mill rolls are fabricated with the high quality raw material.
It is used for rolling down metal to a size that is smaller than its original form. For mills that use rollers to crush grain or stone, see roller mill. These 4high mill rolls are known for its design, robust construction and high efficiency. Mainly used for rolling low carbon steels, its also a great solution for advanced grades such as silicon steels. The ds system is the ideal contactfree way to remove the rolling emulsion from the strip. Review on cold rolling mill roll deformation ijoer. Cold rolling on a 4 hi reversible mill linkedin slideshare. Multiroll cold mill stands are described using different terms depending on their type and manufacturer. The most common configuration is the single reversing mill. In india now a days mostly 20 hi and 4 hi rolling mills are installed in bi g steel produ ction units.416 61 845 160 872 431 600 632 53 50 1623 1249 1034 923 229 24 951 783 224 155 889 1229 857 315 1415 911 40 1486 675 1412 1425 1209 378 279 1164 1482 743 1479 403 329 234 34 820 519 619 539 1317