These rolls are usually heat treated, the hardness range is 35 -55 deg Shore and they are commonly used as back-up rolls in 4-high rolling mills. An alloy steel containing tungsten (W) and with a hardness of 40 – 50 deg Shore is very resistant to fire cracking and is sometimes used for roughing rolls in hot strip mills.
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In two high reversing rolling mills the rolls rotate ist in one direction and then in the other, so that rolled metal may pass back and forth through the rolls several times. This type is used in pluming and slabing mills and for roughing work in plate, rail, structural and other mills.
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In order to solve the serious backup roll spalling of roughing mill during ultra-wide stainless steel rolling process, a 3D elastic deformation finite element model of 4-high roll stacks was ...
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Depending on the product range, for instance cooper, brass or bronze, and the required annual capacity, SMS group develops and erects the right mill type for roughing, intermediate and finish rolling. Included here are reversing and tandem mills in 4-high, 6-high or 20-high (only reversing mills) design.
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4 High Rolling Mills for sale New Used. MACHINE# 13434 SPECIFICATIONS Manufacturer SCHMITZ Germany Type 4 Hi reversing Cold rolling mill with Hydraulic AGC and DC motors Work roll dia 150 123 mm 4.8 5.9 Backup roll dia 450 431 mm 17.7 17 Main. Chat Now; Casting rolling mill Cold rolling mill hot rolling mill
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It is used in slabbing, plumbing, rail, plate roughing work and many other areas. As there is the need for a reversible drive, this mill is cheaper compared to the others. Two High Non-Reversing Mills: In these mills, two rolls continuously revolve in the same direction and we can't reverse the direction of …
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rolls and to increase mill throughput in reversing roughing stands by moving from a standard 7 pass practice to a 5 pass rolling strategy. This process change was favored by the excellent biting behavior of semi-HSS grade. For semi-continuous mills, standard campaign length with high chromium steel rolls was ranging from 20 to 40 ktons in the ...
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Heavy cuts can be achieved because our roughing end mills have a much higher effective feed per tooth than a conventional end mill. Normally a 20% reduction in effective horsepower is used. Roughers have chip-breaker cutting edges, the "peaks" on each cutting edge provide the cutting action producing short fat chips rather than long stringy ...
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The four-high rolling mills are used for rolling of plates and strips in case of hot rolling and strips in case of cold rolling. These mills are both non-reversing and reversing types of the rolling mills. Six -high mills – In six high rolling mills, there are …
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Mills - 4-HI. Tandem Cold Mills. Cold rolling is accomplished by processing steel strip through a series of Tandem Rolling Mill "Stands.". Each stand has vertically assembled rolls that are powered by large motors to transmit high compressive pressures into the material. Hot-rolled, pickled coils are fed into the cold rolling mill from an ...
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Hot Rolling Mill complex is equipped with walking beam reheating furnace, primary descaler, 4-hi reversing roughing mill, 4-high reversing Steckel Mill, down coiler, laminar cooling & roll grinding machines, procured from world renowned suppliers.
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Fig 2 Typical 4-high stands showing various details. Pre-stressed mill stand – In a conventional rolling mill, the roller separating force which arises when the work piece bar is passed through the rolls is transferred through the backup rolls and their bearings to the mill house. In a pre-stressed mill stand, the two backup rolls are connected to each other by an element, pre-stressed to …
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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 …
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Roughing Mills IEN# 118834 - 110" Roughing Mill Mfg. Year 1941•• The Screw Downs were repowered in 1996 with new SCR base drives with a digital control on the front end. The motors were increase in size to 100 HP per side •• New operator controls for these systems were...
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Complete Coil Plate Mill (EU) – main equipment; 2 no. reheating furnaces; Davy 4 high reversing roughing mill; Davy crop shear; 6 no. Davy 4 high finishing stands; 2 no. downcoilers; – plus all ancillary/supporting facilities. Sold to China.
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A typical layout of the mill is shown in Fig. 8.16. The heated metal is first rolled in two high roughing stands. Many merchant rolling mills use three high rolling stands for intermediate passes. The three high stands or roughing stands may be followed by a few …
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continuous mill and a mill with 4 to 6 continuous roughing stands is called a continuous mill. In 3/4 continuous and continuous mills, the first stands are usually two high stands while the remainder are 4 high stands. In addition to these horizontal stands, several edgers are also used.
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They can roll a wide range of steel grades. Reversing cold mills are also a good solution for demanding silicon or stainless steels. We offer you the right type of stand for every product mix. This includes four-high, six-high, 18-HS and 20-high designs. Our portfolio also includes double-stand compact cold rolling mills (Compact Cold Mill CCM ...
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x The initial hot-working operation for most steel products is done on the primary roughing mill (blooming, slabbing or cogging mills). x These mills are normally two-high reversing mills with 0.6 -1.4 metres diameter rolls (designated by size).
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Forged and Cast Rolls ™ DESCRIPTION APPLICATIONS Product Type of Mill Position Plate 2,3and 4 High Roughing/Finishing Wide Strip 4 High Continuous Finishing Wide Strip 4 High Reversing Roughing/Finishing Cold Reduced Strip 4 High Continuous Work Rolls Sheet and Coil 2 High Skin Pass Work Rolls Sheet and Coil 4 High Temper Back Up Rolls DEPTH ...
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Plate Mills Works Nagoya Feb. 1975 Roughing 4-high reversing 4-high reversing 1,200 1,900 4,800 HSB+VE+4H+4H HSB +VE 4H 4H HSB +VE 4H 4,700 4,724 4,724 5,500 1,830 (with bending roll) 2,000 2,000 2,400 1,020 1,000 1,000 1,200 Mar. 1968 Finishing Roughing 4-high reversing 4-high Finishing reversing 4-high Jan. 1977 reversing Kimitsu Oita Mill ...
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4-High Reversing Roughing Mill and Vertical Edger 4-High Reversing Finishing Mill with Steckel Furnaces – United Engg Automatic Gauge Control, work roll bending in the finishing mill to give the strip a better profile and gauge
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Theoretical calculation method of firsthand roll crown for the four-high reversing mill of the medium and heavy plate based on production condition and equipment features at Xingang medium plate plant is introduced., …
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Keywords: Hot Strip Mill, Roughing Stands, Work Rolls, High Chromium Steel, Semi-High Speed St eel 1 Introduction In the early 80´s, the Chrome steel work roll grade was developed by European ...
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Roughing mill rolling of reheated slab: The roughing mill usually consists of one or two roughing stands in which the slab is hot rolled back and forth 5 or 7 times repeatedly to reach the minimum thickness requirement. The roughing mill also contains edger rolls that are …
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4 High Rolling Mills For Sale, New & Used | MachineSales. MACHINE: # 12272 Four-high mill Norton 650 Year of Manufacture 1966 - major repair - 2007 Technical data: - Thickness range of rolled strip 14,5 - 1Machine # 12215 manufacturer: e w bliss co type MILL: 4 high non reversing rolling MILL work roll size: 1...
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Wide Strip 4 High Continuous Finishing Wide Strip 4 High Reversing Roughing/Finishing Cold Reduced Strip 4 High Continuous Work Rolls Sheet and Coil 2 High Skin Pass Work Rolls Sheet and Coil 4 High Temper Back Up Rolls DEPTH OF HARDNESS Surface Discard H 'C' 90 85 80 75 70 65 60 55 50 45 40 35 30 25 AIM CHEMISTRY (WT%) Code Leeb E Shore C C Si ...
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Quarter-section of a 4-high mill stand with axial work roll shifting ... leaflet are without any obligation and raise no liabilities to or form part of any sales contracts of ANDRITZ AG. ... One single-stand 4-high reversing roughing mill ... Tandem Cold Rolling Mill 1:. Read more.
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