Cluster mill is a typical solution: among several layouts proposed [5,8], Sendzimir mill or "20-high mill" is herewith investigated [Fig.l], to­ gether with a more compact version, called "Z-mill" [1]. The number and the layout of rolls may change if another kind of cluster mill is considered, but the main strategy is common:

Compared with the four-high mill equipment, the offset eight-high mill equipment has the following characteristics: (1) Unique structure of partial eight-high rolling mill. The unique structure of the partial eight-high mill is that the work roll has a side support system and the installation position is off the center line of the back-up roll ...

A core product of Union Electric Åkers Thousands of Hot Strip Mill Work Rolls come off of our production lines each year, making Union Electric Åkers one of the world's largest roll manufacturers of Hot Strip Mill Work Rolls. All our Hot Strip Mill Work Rolls are made using the vertical centrifugal casting method, ensuring high in-service integrity and …

The problem of failure of Rolling mill housing was there in industry, which can be efficiently solved by using CAE. The present work involves the design optimization of work roll chock and backup Roll chock in cold rolling mill, to control the failure of choke in the cold rolling mill for retain the material cost and longer life of the roll chock.

Four-high mills are very common for steel, aluminum, copper, and any high production metal rolling. One disadvantage of a 4-high mill is that the edges of the material tend to elongate. There is no supporting surface at the edges. Even though the roll is equipped with roll bend, a complicated roll shape may be necessary to eliminate elongation ...

TheUC-4mill can choosethe workroll diameter mostsuitable for the hard-ness of the materials. Shapecontrol characteristics in thin andhard strip rolling with the UC-4mill were examined experimentally and analytically. 2. Structure of UC-4Mill Figure I showsthe structure C1991 ISIJ of the UC-4mill and the 594 dimensions of our test mill. In the ...

ment is the 2-high, but there are complex designs using twenty or more rolls in a single stand. The most common arrangement is the 4-high design and consists of two work …

The housing of a work roll or backup roll bearing is known as roll chock or simply chock. Chock is the basic part of a rolling mill. It is mounted in the window of the roll stand housing between the posts with …

Q. Zhu, "A study of oxidation and wear on high speed steel roll material", Thesis University of Wollongong, 2012 5 H-H. Kim & al. "Oxidation Behaviour of High Speed Steels in Dry and Wet ...

In this paper, the stress analysis of roll chock made of gray cast iron, CA6NM, CF8, EN8, and Fe-410 materials has been used for FEA analysis using a FEA software, and from the results, it has been concluded that the chock made of CA6NM material produced 50.01% lesser deformation and 2.96% less equivalent stresses than …

Introduction. Four-high mills are mainly used for rolling foils, sheets and plates and account for a large percentage of all mills. The speed of contemporary four-high mills has reached 1800–2200. m/min to meet demands for rolling of foils and sheets.. However, frequent burning of end-thrust bearings in the work-roll assembly can disrupt …

The typical configuration of a four high rolling mill comprises four rolls: two work rolls (WRs) in contact with the strip to deform it and two backup rolls (BURs) …

The desired hardness is achieved by changing the carbide to graphite balance with the help of the chemical composition. The presence of flake graphite makes the material resistant to fire cracking, spalling/chip-off …

View. Download scientific diagram | Work roll bending forces in 4-roll mills from publication: Hot rolling mill hydraulic gap control (HGC) thickness control improvement | In this article the AGC ...

Generally, semi-steel, high-chromium steel, high-speed steel are chosen. The work rolls rolling mill roll before finishing rolling mill (F1-4): The work rolls in the front …

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Extensive range This market segment covers forged Work Rolls and Intermediate Rolls for use in Wide Cold Strip Mills of 2-high, 4-high, or 6-high types, including reversing Reduction Mills, Tandem Mills, Double Reduction Mills, and Temper/Skin Pass Mills. Our Rolls can be supplied in a number of grades to suit various applications, materials, and …

Camber For Hi Mill Work Roll theaxisinForged Steel Rolls Metallurgical Solutions Provider. 4 high demag roll mill camber for 4 hi mill work roll 4 high rolling mill a pair of upper and lower work roll camber wear of cold rolling mill 4 hi mill workroll material composition mcmain raw material Hotion uses electroslag remelting process to keep forged raw …

In this work the mechanical properties which are essential for a work roll to be used in rolling mill for effective and quality rolling is being studied which also helps to …

Download scientific diagram | Layout of a 4-high rolling mill stand. from publication: Optimum Work Roll Profile Selection in the Hot Rolling of Wide Steel Strip Using …

The advent of automated, high-speed tandem coldrolling mills for wide strip has reduced the available manpower for observing and controlling strip shape (or flatness) after each stand. Consequently there has been an increased emphasis on selecting ground roll cambers which minimise manual adjustments of coolant flowrate and roll bending …

4 hi mill workroll malzeme bileşimi. ... Type: 4-Hi Rev. Mill LLQ500, Built: 1970, Revamped: 2011, Strip width: 420 mm, Thickness: 0.2 – 4.0 mm, Speed: 20 – 400 m/min., Rolled material: Carbon steel (can be used for other applications too) Electrical equipment and cooling unit are not included! ... .Cold rolling significantly strain ...

Web11012020 4 hi mill workroll material composition saluteindia Dec 10, 2015 Rolling mill Rolls and Roll Shop Rolls are the main and very costly consumables in a rolling mill They are used to roll steel in the rolling mill and their performance depend on many factors which include the materials used and the loads to which they are subjected to ...

a 4-high rolling mill stand; b exaggerated natural mill deflection behavior of 4-high mill stand, involving bending, shear, and flattening of rolls; c measured roll diameter profiles for a new work roll, the same roll when warm (after a single old rolling pass), and the same roll when cold and worn (after multiple passes); d section of a thin strip …

In order to study the hot Compact Strip Production (CSP), four-high mill vibration characteristics, and vibration suppression method, the roller system structure stability was analyzed and calculated at first in the paper. And then, the mill stand gap was measured at field and its influence on roll transverse vibration was analyzed. The drum …

Product description. The diameter of the 6-high work rolls amounts to approximately 1:4 in relation to the barrel length. In comparison to a 4-high mill stand, the utilization range is wider. 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.

The performance of a conventional 4-High mill is not satisfactory in these requirements. A new 6-High cold rolling mill (hereinafter HC-MILL) has been developed in order to solve these shape problems. The HC-MILL for steel rolling was put into a practical operation at Nippon Steel Corporation at Yahata Works (now, Nippon Steel & Sumitomo …

Parameters for low friction coefficient has been studied and total number is calculated where the friction coefficient goes below the range and causes the fracture. 1.2 Work …

The diameter of roll barrel is 350 1800mm. The material of back-up roll includes 60CrMo 9Cr2Mo 86CrMoV7 70Cr3Mo 5Cr5NiMoV etc. Get Price; 4 Hi Mill Workroll Material CompositionThe 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.

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 ...

High reduction schedules combined with the requirement to produce a widening range of material cross-sections and a more varied range of softer and harder materials, results in increasingly greater challenges in the control of roll temperature and the effective transfer / extraction of heat.

4-high Cold Rolling Mills. DANIELI FRÖHLING's 4-High Mills are used throughout the Ferrous and Non-Ferrous Metals Industries. They are in operation for heavy gauge breakdown rolling, intermediate and thin strip finish rolling, as well as for cladding and temper rolling. Single stand Reversing Mills are the most flexible type of application ...

The high-speed steel roll material used in this investigation has the following composition: C 1.96 wt%, Cr 4.85 wt%, Mo 4.47 wt%, W 3.4 wt%, V 4.00 wt%, Mn 1.26 …

Cr4 and Cr5 back up rolls have a carbon content of 0.4% to 0.6% and a Cr content of 4% to 5%, suitable for high-speed steel and semi-high-speed steel work rolls. For some small mills, the forged steel backup rolls of 1000mm or less are made of 86CrMoV7 and 9Cr2Mo, its carbon content is 0.80% to 0.95% and Cr content is 2%.

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A special feature of Sundwig S6-high rolling mills are the side-supported work rolls. The patented Sundwig S6-high side support stabilizes the work rolls in this type of mill stand using mechanical, hydraulic lateral support equipment, thus preventing lateral excursion of these rolls. The diameter of the S6-high work rolls is only approximately ...

2. Introduction to Assembly of Finishing Mill Stand and Clearances The finishing mill stand in a hot rolling mill typically consists of two to seven four-high mill tandem stands. Each stand consists of housing and a vertical assembly made up of two work rolls (WR) and two backup rolls (BR) within the housing.

Specifications of the laboratory mill. 1 Jd Roll dimension (mm) Backuproll Workroll c400X350l ip80 X350l Distance between cylinders (mm) Backuproll Workroll 560 680, Maximumroll separating force (tf) l20 2. Simulation Model 2. 1. Outline of the Model Thespeciflcations of a 4-Hi mill of laboratory scale used in this study are shown in Table …

roll bite and in a typical Cold Tandem Mill, work roll temperatures normally fall in the range of 55oC – 70oC with strip recoil temperatures and inter-stand strip temperature rarely …