Dec 08, 2013· roll life, rolling, rolling mill, rolls , Rolling Mills Rolls Rolling had assumed importance in the industrialized world during the nineteenth century Profiles and flats are hot rolled while some flat products are also cold rolled Rolls are tools in the rolling mill The weight of the rolls can vary from a few kilograms to as high as 250 tons
Get PriceFigure (5-2) illustrates the sequence of steps in a steel rolling mill to show the variety of products made Similar steps occur in other basic metal industri The work starts out as a cast steel ingot that has just solidified While it is still hot, the ingot is placed in a furnace where it remains for many hours until it
Get Pricethe back-up rolls of 4-HI mills Figure 5 shows the roll load and current fillet radius detail Mill design attributes Mill type: 2-HI mill Roll barrel diameter: 990 mm Barrel width: 2180 mm Roll neck diameter: 595 mm Roll neck to barrel ratio: 60 percent Screw-down distance: 2980 mm Roll body material: Steel Young’s modulus: 210000 MPa
Get Pricework has been carried out at Bokaro Steel Plant, SAIL to min-imize the defects in cold rolling products In the present work internal customer ship is divided among the whole process flow Slab is the customer of reheating furnace, Reheated Slab is the customer of the Hot rolling mill, Hot rolled product is
Get PriceA low-carbon steel slab with the chemical composition of 008% C, 035% Mn, and 005% Si (wt%) was hot rolled with initial temperature of 1280 °C and initial thickness of 204 mm, width of 1053 mm, and length of 9680 mm where work-roll diameters in R1 and R2 stands are 1093 and 1160 mm, respectively, and work-roll diameters in finishing mills .
Get PriceSep 11, 2014· The differences between hot rolled steel and cold rolled steel relates to the way these metals are processed at the mill, and not the product specification or grade Hot rolled steel involves rolling the steel at high temperatures, where cold rolled steel is processed further in cold reduction mills where the material is cooled followed by .
Get PriceRolling is done both hot and cold It is accomplishes in rolling mills A rolling mill is a complex machine having two or more working rollers, supporting rollers, roll stands, drive motor, reducing gear, flywheel, coupling gear etc Rollers may be plain or grooved depends upon the shape of rolled product
Get PriceReheating furnace for steel rolling mill line is a device (an industrial furnace) that heats a material or a workpiece (generally a metal) to rolling forging temperature in the metallurgical industry Structure and composition According to the distribution of furnace temperature, the furnace is divided into preheating section, heating section and heating section along the length direction
Get PriceMar 31, 2015· ThyssenKrupp Steel Europe spent a quarter of a million euros on renovating its hot-strip rolling mill in Duisburg The animation shows how it all works
Get Priceby design limits for maximum separation force, torque, Hertzian pressure etc, but these criteria are valid , which are more or less very “normal” for rolling mills - roll damage often occurs with consequences for the mill and the rolled product Evidently the reasons of roll , the contact area of hot rolled material during rolling may .
Get PriceJul 18, 2013· (2010) VCR back-up roll and negative work roll contour design for solving roll spalling and transfer bar profile problems in hot strip mill Ironmaking & Steelmaking: Vol 37, No 8, pp 633-640
Get PriceFeb 25, 2016· If a mill rolls 80 % of the calendar year, that is 365 x 24 x 080 = 7008 hours If the mill rolls 800,000 tons per year, it runs at an average production rate of 11416 tons/hour If the .
Get PriceWe offer work rolls for finishing mills used by blast-furnace and electric-furnace steelmakers to manufacture hot strip Rolls for H- beam Steel Mills We offer rolls for mills that produce H- beams steel which are widely used in buildings, bridges, ships, and quay walls
Get Pricethe work roll of a rolling mill The considered hot rolling mill consists of two hollow cylinders receiving heat in contact with the work piece and cooled by convection on its internal and external surfac Hsu et al [19] considered a three dimensional inverse model for estimate the surface thermal behavior of the work Roll in hot rolling .
Get Pricemotors These are known as mill stands The layout of a rolling mill varies, from a simple single stand mill to several stands positioned either side by side or in a line A mechanism, commonly called a roller table, directs the work piece to the rolls, and another roller table for handling the pieces emerging out of the roll
Get PriceRolling mills work from master coils, and usually they would have a minimum order quantity somewhere in the truckload range If the amount of material for your application is much less than the quantity that the steel mill required, steel warehouses would be an alternative way to search
Get PriceHot rolling and rolling defects: , Rotation of the axis of the work roll with respect to axis of backup roll in horizontal , Mill spring is a defect in which the rolled sheet is thicker than the required thickness because, the rolls get deflected by high rolling forc Elastic deformation of the mill takes place
Get PriceFigure 91011-1 The cane is received at the mill and prepared for extraction of the juice At the mill, the cane is mechanically unloaded, placed in a large pile, and, prior to milling, the cane is cleaned The milling process occurs in two steps: breaking the hard structure of the cane and grinding the cane Breaking the cane
Get Priceinternal cooling work roll design hot mills , internal cooling work roll design hot mills Contact us If you have any needs, please contact us, , flour mills, cold roll forming machines and related products Get Price; Basics of aluminium rolling mill technology EAFA
Get PriceWhat Is A Rolling Mill? 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 concept is similar to the rolling of dough Rolling is classified according to the temperature of the metal rolled
Get PriceThe wear tests were carried out using work roll test discs with surface roughnesses lying within the range Ra 01 µm to Ra 075 µm This range is similar to that given by Caithness et al [12] for high-speed steel work rolls entering service in the former BSSP hot strip mill at Llanwern, UK
Get PriceCVC (Continuous Variable Crown) work roll contour technology since its invention has been applied in more than 150 hot rolling mills worldwide for controlling strip shape However, serious uneven wear on backup rolls and even roll spalling problems can occur due to contact pressure concentrations that exist between work and backup rolls when .
Get PriceThe most common configuration is the single reversing mill Various mill designs are offered that include 6-high UCMs (Universal Crown Control Mill), ZR mills and 12-high cold-rolling mills with small-diameter work rolls for the efficient rolling of materials of high hardness
Get PriceAdvantagesofAluminum Thepropertiesofaluminummakeitoneofthe mostadvantageousandversatilematerialsin usetodayAluminumis: Lightweight—Aluminumanditsalloys weigh .
Get PriceWe are specialized in cast roll supply ranging from cantilever rings, kock mill rings, sleeves, bar mill rolls, , For forged roll quality, we supply work rolls to cold mills as well as back-up rolls to both hot strip mills and , High Speed Steel Rolls, Get Price; metallurgical application to work and back up rolls for hot .
Get PriceThe four high mill uses this principle with two smaller work rolls each supported by a larger backing roll Figure:145 The cluster mill, or Sendzimir mill, uses a small work roll backed up by many other rolls
Get PriceThe roll grooves in a roller and the roll pass sequence in a hot rolling mill are usually designed based on the type of grades and dimensions of the products and the mill capacity These have been established over the years based on ana-lytical methods With modern capability of computer based simulation of the hot deformation process, it is .
Get Price•Roll-strip contact length L •Average strip width w –despite the fact that spreading, or an increase in width, may actually occur if edger mills are not used •Average true stress of the strip in the roll gap Y avg •Assumes no friction and thus predicts lower roll force than the actual value •Power per roll (SI units)= pFLN / 60,000 kW
Get Priceworked on the design and pro - duction of bearings for rolling mills and gathered extensive experience in this field This is presented in the present publication A designer of rolling mills will find here the principles for selection and calculation of roll neck bearings Their mounting and maintenance is also covered in detail For any
Get PriceFeb 14, 2019· Hot rolled steel is the by-product of the hot rolling process, and it is very popular in the construction industry, whether as an end product or as a raw material to carry out other operations How does the operation of hot rolling mills works:
Get Price