Two-High: Generally, a 2-HI mill is used for hot or cold breakdown and finishing of bar, sheet or strip. A wide range of sizes with separating force capacities from 10,000 lbs. (4.53 MT) to over 3,000,000 lbs. (1360 MT) are available. Three-High: A 3-HI mill is an economic milling solution for the breakdown of rod and ingot. Four-High: A 4-HI mill may be used for finish rolling of thin gauge ...Hot Rolled Products: With wide product portfolio coupled with robust supply chain, Tata Steel has been able to maintain leadership position in Indian Automotive Market steel supply. Apart from supplying from the start of art hot rolled facilities at Jamshedpur (Hot Strip Mill & Thin Slab Caster), Tata Steel has also come up with a Hot Strip ...

In hot strip rolling, a slab, usually a steel stock heated above the recrystallization temperature, is passed through the roll gap several times, with the gap being progressively reduced to achieve the desired final dimensions. Mill designers and operators are keenly interested in proper design and control of the hot strip rolling precess.A.S. Precision Machines Private Limited is a well recognized name amongst the rolling mill manufacturers in India serving the steel industry with a wide portfolio of satisfied clients. Founded more than thirty-five years ago in North India, ASPM offers the latest technology for the Rebar Rolling Mills, Section Rolling Millsand Strip Rolling ...

In some mills (e.g. hot strip mill, wire rod mill, merchant mill, and cold rolling mill), the rolled product is coiled in a coiler or a wind up reel. Mostly, rolling is done at high temperature, called hot rolling, because of requirement of large deformations. Hot rolling results in residual stress-free product.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.

In a Hot rolling mill especially in a steel industry where highly integrated automation is used for high quality steel strip production, how roll change can be… SlideShare uses cookies to improve functionality and performance, and to provide you with relevant advertising.In the hot continuous rolling process, the main factor affecting the actual thickness of strip is the rolling force. The precision of rolling force calculation is the key to realize accurate on-line control. However, because of the complexity and nonlinearity of the rolling process, as well as many influencing factors, the theoretical analysis of the traditional rolling force prediction model ...

The rolls change shape during rolling because of the forces acting on them, which tends to bend the elasticity of the rolls during rolling. If the elastic modulus of the roll material is high, then the roll deflection would be smaller. Compared to its edges, the rolled strip tends to be thicker at the center.In the hot strip mills, the flat slabs, proceeding from continuous casting, are rolled . The rolled slabs are heated to temperatures of 1200 °C or higher, in order to go through a large reduction in the hot strip mill at a range of temperatures between 1100–1200 °C.

•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 kWA change in the nonlinear spring force coefficient of the hydraulic cylinder considerably affects the vibration state of the rolling mill rolls, and changes in the coupling parameters lead to the complex nonlinear phenomenon of the vibration system. Thus, the coupling vibration model of a hot rolling mill established in this paper is confirmed ...

Roll change rigs. ANDRITZ Herr-Voss Stamco provides engineering and supply of new or upgraded roll change equipment for rolling mills. Mill types included are skin pass, temper, hot and cold rolling mills. Mill configurations include 2 High, 4 High and 6 High. Styles that are provided are as follows: Porter bar.Attributes imparted to the strip by the hot rolled strip mill include surface quality, thickness, width, and flatness control as well as strip profile. Rolling of steel slabs in hot strip mill consists of several sub-processes and at the end of them the final …

the effects of width spread in the roll bite as well as creep deformation between the stands. Effective width-deviation compensation using tension control is limited to low-frequency width deviations. By default, the strip width in a hot-strip mill is deter-mined by edging and rolling the strip in …During a hot rolling process, surface defects on strips can severely affect the quality of the rolled product, particularly for two conditions: (1) there are initial defects on continuous casting ...

The tandem mills consists out of a series of rolling stands that thin the steel strips. One of our tandem mills works exclusively for the automotive industry, the other produces products for the remaining branches. After having passed through the cold rolling mill, the steel strip is hardened.These rolls can either be flat or grooved (contoured) for the hot rolling of rods or shapes. Under these conditions, the rolls grip the piece of metal and deliver it, reduced in cross-sectional area and therefore, increased in length. x The initial hot-working operation for most steel products is …

The hot-strip mill squeezes slabs, which can range in thickness from two to ten inches, depending on the type of continuous caster, between horizontal rolls with a progressively smaller space between them (while vertical rolls govern the width) to produce a coil of flat-rolled steel about a quarter-inch in thickness and a quarter mile in length.The demand for hot rolled strip is growing in multiple ways. To remain competitive, new and existing mills must meet this challenge in the best possible way. The production of hot strip is a key element of steel production. Since close to half of all steel produced is hot-rolled to strip, mills require maximum throughput and availability ...

The Hot Rolling Process The primary function of the Hot Strip Mill is to reheat semi-finished steel slabs of steel nearly to their melting point, then roll them thinner and longer through 12 successive rolling mill stands driven by motors totaling 77,000 hp, and finally coiling up the lengthened steel sheet for transport to the next process.Then, as the cold mill gap is adjusted to reduce the crown, the coil also will come out flat--if the hot mill got the relationship between crown and flatness right to begin with. If the cold mill rolls or hot mill coils have too much crown, the mills will roll out the center, creating center buckle in the process (see Figure 8).

– Calculate roll separation force ("rolling force") and torque – Processing Limits – Calculate rolling power. Prof. Ramesh Singh, Notes by Dr. Singh/ Dr. Colton 13 Flat Rolling Analysis • Consider rolling of a flat plate in a 2-high rolling millAdvanced laminar cooling system for hot strip mills. FAST PINCH ROLL CHANGE. Innovative pinch roll design for quick roll changing. HS-COILING. High-speed semi-endless and endless shear and downcoilers. Q-SAMPLE. Sampling solutions for any strip thickness & …

Slabs are the feed material for hot strip mills or plate mills and blooms are rolled to billets in a billet mill or large sections in a structural mill. The output from a strip mill is coiled and, subsequently, used as the feed for a cold rolling mill or used directly by fabricators.2: Three high rolling mill: It consists of a roll stand with three parallel rolls one above the other. Adjacent rolls rotates in opposite direction. So that the material may be passed between the top and the middle roll in one direction and the bottom and middle rolls in opposite one. In three high rolling mills the work piece is rolled on both ...

hot strip mill roll change. hot strip mill roll change Quick RollChanging in Steel Strip Production 16/04/2012 Such hotstrip mills roll steel slabs up to 35 tons heavy into strips up to two meters wide and only one millimeter thick The steel strip is still at temperatures of up to 600 degrees Celsius when coiling under tension between the pinch rolls If the surface of a roll becomes damaged ...Quick Roll-Changing in Steel Strip Production. With a new technology Siemens makes the exchange of pinch rolls in hot strip mills faster. Siemens reported that they found a way to simplify the production of steel strips. The company told a new technology is making the exchange of pinch rolls in strip mills faster and even more efficient.

of sizing presses in hot strip mill (hereinafter called HSM) lines. Originally, large-sized caliber edgers (sizing mills) with a bottom diameter of f1 200 mm were used for slab-width sizing, and their advantage with regard to material deformation brought about the emergence of caliber rolls with a very large diameter, f2 200 mm. IHIIf the strip is rolled after heating the strip above the re-crystallization temperature then it is termed as Hot rolled and if that done in room temperature then it is termed as the Cold rolled.Rolling is a process that is widely used and has very high production. Working Principle of Rolling Process: