In this paper, a mathematical model for a four-high mill is proposed to analyze the elastic deformation of its back-up and work rolls, including their respective axial deflections and surface flatness. The contact pressure between the back-up and work rolls and that between the work roll and foil are functions of the roll's position in the axial direction.As shown in the figure below, the rolls in a 4-high rolling mill are subjected to four kinds of deformation: (i) deflection of the back-up rolls, (ii) deflection of the work rolls, (iii) flattening of the work rolls caused by contact with the back-up rolls and workpiece and (iv) flattening …

4-Hi Rolling Mill Application and characteristics. 1. Suitable for common carbon steel, stainless steel, rolled steel, special aluminum or copper tape strip etc.. 2. Work roll and supporting roll drive type,Can quickly adjust the strip crown, Change the contact pressure distribution between the rolls, to control the plate shape and plate ...TECHNOCRAFT ENTERPRISES Plot No. 518, G.I.D.C. Estate, Odhav, Ahmedabad 382 415. Gujarat, INDIA. Tel: +91-79-2287 3711, 22870170 (R): +91-79-27551835 Telefax: +91-79 ...

The AFC functions are typically performed in the same PC-based computer system hardware used to implement the automatic gauge control (AGC), interstand tension control (ITC) and mill setup models. The following schematic diagram shows the overall layout of the AFC system for a 4-high mill with CVC work roll side shifting.MACHINE: 13693 Manufacturer: Waterbury Farrel Co USA Type Mill: 4 High Non Reversing Rolling Mill Work Roll: 2" (50.8mm) diameter x 14" (356mm) wide Back Up Roll: North Branford, CT View Listing 3" (976.2mm) x 10.5" (267mm) x 10.5" (267mm) RUESCH 4 HIGH ROLLING MILL (13

The 4-high mill is equipped with positive and negative work roll bending in order to influence the shape and the flatness of the strip. Either the work roll or the back-up roll is driven, depending on customer requirements. The diameter of the 4-high work rolls amounts to approximately 1:4 …4-High Rolling Mills. Four-high rolling mills can be put in tandem, two to seven stands, instead of a reversing mill. 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. Sometimes mechanical screw downs are preferred when there is a risk of fire.

Rolling mill consisting of four rolls or known as a 4 High rolling mill is used for reducing material to extremely small thicknesses. Through the use of larger backup rolls, the issues of roll deflection can be avoided and smaller work rolls can be used.camber for 4 hi mill work roll - oys.co.in. camber for 4 hi mill work roll. roll mill pour savon. camber for 4 hi mill work roll; roll mills industry pvt ltd; retrofit toshiba mesin roll penggiling; .....

The effect of deleting the backup roll taper has been to increase the cal­culated work-roll camber over the whole range of strip widths rolled. Since rolls are ground using a cam to control the profile, there was no difficul­ty in implementing such a work-roll profile on the Westernport mill by introducing a new cam with the required profile.A rolling mill includes an upper work roll 1 supported by an upper work roll chock 5, an upper backup roll 3 supported by an upper backup roll chock 5, for backing up the upper work roll 1, a lower work roll 2 supported by a lower work roll chock 6 and a lower backup roll 4 supported by a lower backup roll chock 7, for backing up the lower work ...

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 ...A camber shape at the surfaces of the backup and work rolls is designed to counteract the rolls' elastic deformation and to make the rolled foil as flat as possible. The effects of the selected roll materials upon the rolled thickness distribution are also discussed. A thickness variation within 1 μm can be obtained for a foil of 50-μm ...

Used 15.5" United 4-Hi Cold Rolling Mill for Steel: RM-450. Manufacturer: United 15" cold mill for steel / very nice mill!!!Manufacturer - United Engineering / new 1950's - Upgrades in 1995 = revamped, new thyristor drives, new hydraulic screwdowns, and new AGC Status - Installed, under p...A two high mill with work roll diameter of 0.95m and 3.6m in length is selected to cold roll a strip of width 900mm with length of 0.5m and a thickness of 0.002m in a single pass. The dimensions of the roll shoulder are: Diameter 0.475m and length 0.2375m.

In this work, finite element simulations have been performed to model camber and lateral movement during hot rolling. To verify the results, experiments were made in MEFOS's pilot plant mill.The invention relates to the control of rolling mill backup roll eccentricity by combining the load carrying characteristics of rolling mill tapered roller bearing assemblies during rolling with prescribed levels of axial thrust to effect a controlled deflection of backup roll necks on a 4-high rolling mill or the like due to the selected thrust force applied axially to the ends or necks of ...

The versatile Waterbury Farrel 4-Hi Mill can be deployed as both a non-reversing mill for intermediate rolling and as a reversing mill for finish rolling. Smaller work rolls allow for more efficient material reduction. The larger backup roll positioned against the smaller work roll reduces separating forces and permits the rolling of wider and ...ASPL has two 4-Hi Cold Reversing Mills with Automatic Gauge Control System, Work Roll Bending system. This process helps reduce thickness & simultaneously maintain the strips profile & flatness as well as shape & other dimensions under tolerance levels.

Manufacturer and Exporter of FORGED STEEL ROLLS named Work Roll, Back-up Roll, Drive Roll, Intermediate Roll, Senzimer Roll, Leveler Roll, Tube Mill Roll etc Rolls are being used in Cold rolling of Sheets and Coils of Stainless sheets, Mild Steel, Aluminium, Copper and others.2hi reversing mill roll optimumledde. 2 hi rolling mill hani tech hani tech rolling this machine is used to roll raw material thickness mm, width mm, made of plain carbon steel, low alloy steel, stainless steel and nonferrous metal strip, used for roughing or roughing mill this machine is a tworoll cold rolling mill, which consists of main unit, main motor, and reducer.

formation of this strip camber, a force controlled edger is proposed, see Figure 1. Initially, the upper work roll is positioned with some clearance above the resting strip. In the following step, the required rotational speed is applied to the work roll, and the work roll is lowered to the final strip thickness.7.5 RELATIONSHIP BETWEEN STRIP CROWN AND THERMAL CAMBER 123 7.6 WORK ROLL BEND AND ROLLING LOAD EFFECTS ..... 129 CHAPTER 8 ... In a four-high mill the work rolls are supported by two back-up rolls of larger diameters (as in f ig. 1.1) ... work roll temperatures, mill power consumption, lubricant and coolant flows and strip,

Waterbury Farrel 6-Hi Mills provide improved flatness using a work roll bending mechanism and intermediate axial roll adjustment. These mills also provide improvements to the shape of rolled strip, increased reduction and greater rolling efficiency. Tandem Mill Improvements. A tandem mill replaces the first 4-Hi Mill stand with a 6-Hi Mill ...The camber that must be ground into a roll is very specific to a particular work width, material, and force load. A roll must usually be manufactured for only one metal rolling process. In some industrial metal rolling processes, rolls are given temporary camber by applying forces through their bearings.

Roll camber. With the aid of the Innoval Stack Deflection Model, we can investigate the change in shape of the roll. Using the geometric information of the mill and considering the crown being used, we can determine the change in the roll gap due to the change in load.Roll changes on such mills are relatively frequent and time consuming. This type of mill is therefore used for primary rolling where rapid change of shape is required, even at the expense of surface quality. Four-high mills are a special case of two-high, and in an attempt to lower the rolling load, the work roll diameter is decreased.

Normally elastic constant for mills may range from 1 to 4 GNm-1. Roll elastic deformation can result into uneven strip thickness across. Roll material is required to have high elastic modulus for reducing the roll deformation. For producing very thin gauge strips, small diameter rolls are used. They are supported with larger rolls.Finish rolling of tight tolerance thin gauge stock – commonly a 4-HI mill or cluster mill; Powder metallurgy rolling utilizing a horizontal mill – designed for plastics and battery industries; Bonding of dissimilar metals; Camber correction of BI-metal strips after Electron-beam welding; Grooved rolls for rod rolling – square or circular ...