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Therefore, different types of rolling mills have different requirements for rolling mill rolls. For example, billets and slab bloomer rolls must have good torsional and bending strength, toughness, and bite in, hot crack resistance, thermal shock resistance, and abrasion resistance.
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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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Hot strip mill (Hot continuous rolling mill) is the production of hot-rolled coil steel rolling equipment. Hot strip mill usually include: walking-beam reheating furnace, high pressure water descaling set, with a four-high reversing universal roughing mill Edger, flying shears, 6 tandem four-high finishing mill group of mills, coilers, laminar flow cooling devices, finished product collecting ...
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4 High Rolling Mills For Sale, New & Used | MachineSales.com. 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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required roll forces. SSAB Tunnplåt in Borlänge is a producer of low-carbon steel strips. In SSAB's hot strip mill, rolling is conducted in a reversing roughing mill followed by a continuous finishing mill. In the reversing roughing mill the temperature is high and the inter-pass times are long.
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Configurations. Mills are designed in different types of configurations, with the most basic being a two-high non-reversing, which means there are two rolls that only turn in one direction.The two-high reversing mill has rolls that can rotate in both directions, but the disadvantage is that the rolls must be stopped, reversed, and then brought back up to rolling speed between each pass.
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on wear is another issue. Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago, the results were never published, but of high interest - also, maybe later. K. H. Schröder July 2003 K. H. Schröder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS File: SCHROEDER_ROLLS_010703.DOC
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title of specification: 37" x 84" sms two high reversing blooming/roughing mill : work roll diameter: 37 : manufacturer of equipment: sms : year of manufacture: 1983 : material being rolled: billet & blooms : number of stands: 1 : bloom width: 16 : bloom height: 9 : stand (vertical / horizontal) horizontal : roll configuration (2 hi, 3 hi) 2 hi ...
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The slab passes through a reversing roughing mill where primary reduction in thickness takes place. The reversing mill is a four high mill with two work rolls and two back up rolls to support them. Here, the slab moves to and fro 6–7 times and reduction takes place in each pass.
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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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Medium and heavy beams, sizes from 300 mm to 700 nun are rolled by sequence shown in Fig. 10.2 (if), The input i.e., rectangular billet is first rolled in open beam passes of blooming mill and in rolls of two high reversing roughing stand of structural mill. Several passes are performed in each groove by changing the gap between rolls.
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The workhorse roughing mill has 135" wide rolls for rolling 'broadside' (as the first roughing mill is commonly called) to make a slab wider. A 5,000 hp motor drives 42"-diameter work-rolls through 28:1 gears to reduce the slab's thickness by as much as 2-½". The last four roughing mills each incorporate edgers for width control ...
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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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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 used to roll …
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rolls specification of high reversing roughing mill; parts of ball mill unit; Support. importers of mill scale; design and construction of hammer mill; characteristics of the ball mill; Contact. Address: No.416 Jianye Road South Jinqiao Area Shanghai, China; Email: [email protected]
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The primary advantage of LMT-Fette's new HSC FEEDTM product is in its ability to significantly shorten roughing times in the machining of die and mold steels. With chip loads up to .0319 per tooth, and cutting speeds in excess of 650 sfm, it is common to run the …
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after the roughing mill and finishing mill. In the case of a large product mix with different entry-strip tempera-tures to the finishing mill, a temperature measurement in front of the finishing mill improves the performance of the FFWC. The signal processing of the exit width of the roughing mill is an important component of the FFWC.
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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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Rolls in hot rolling mills have to withstand harsher and harsher conditions throughout the decades. In the early 2000's, problems of bonding zone fatigue (before reaching scrap diameter of the work rolls) started to occur in some mills. Since then, year by year, increasing fatigue issues were encountered in reversing roughing mills worldwide.
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After exiting the roughing mill, the transfer bar travels to the key-stone of the SMART system – a 110-inch wide, four-high, reversing Steckel mill. Powered by two 6,000 horsepower electric motors, the Steckel mill features full computer control, hydraulic gauge control, work roll bending and shifting, automated drum cleaning and a wide
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Engr 241 9 Rolling Mills • Two-high • primary roughing (cogging mills). • Three-high • primary roughing (reversing mill). • Four High & Cluster • principal (small diameter) rolls lower the roll forces and power requirements, but must be supported in order to reduce deflection.
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Generally, they are two high reversing mills (24-54-inch diameter rolls) For high production rates, universal mills are used to take care of edging (two vertical rolls to control the edge). High-pressure water jets remove scales. Subsequent to the last finishing stand, strips are sheared to the required size or coiled to obtain continuous sheets.
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Quality rolls increase the overall efficiency of any mill: Generalized material recommendation of sg iron rolls for mills is as under: Roughing stands: Forged, Alloy steel, Adamite steel, SG Iron : Intermediate stands: SG Iron, ICCI, DPIC : Finishing stands: SG Acicular, DPIC, Enhanced Carbide
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X-Roll® program offers the right cold mill for you. Ideal for an annual production of 100,000 to 500,000 t are our single-stand reversing mills (RCM). Depending on your product spectrum, they come in four-high or six-high design with CVC ® plus. What makes single-stand reversing mills stand out is their very broad product spectrum.
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Table 1 summarizes the main mill and product specifications, and Figure 1 shows the general line layout. MILL EQUIPMENT. The line consists of a 4-high reversing roughing mill (R2) equipped with hydraulic gap control and a vertical edger at the entry side (Figure 2).
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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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「rolls specification of 4 high reversing roughing mill」 rolls specifiion of 4 high reversing roughing mill rolls specifiion of 4 high reversing roughing mil 2014183 The Emax is an entirely new type of ball mill for high energy High Energy Ball Milling roughing mills roll prom size. rolls specifiion of 4 high reversing roughing mill. rolls ...
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What is claimed is: 1. A hot-rolling mill for producing sheet metal, comprising a reversing stand having pairs of roughing rolls and a reversing finishing stand adjacent thereto and having pairs of finishing rolls, the roughing rolls having diameters larger than the diameters of the finishing rolls and the finishing rolls being operable at a higher rotary speed than the roughing rolls, each of ...
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Technical information about the six high mill Roughness Freq. Of roll Diameter (mm) Ra (micron) change Work roll 425 (max) 380 (min) 0.5 – 0.6 500 tonnes Intermediate rolls 490 (max) 440 (min) 0.6 – 0.7 1000 tonnes Back up rolls 1250 (max) 1050 (min) 0.6 – 0.8 10000 tonnes 5. 7.
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According to the status of rolling middling stock without crown control on the single rough stand in semi-continuous hot strip rolling in domestic, the advantages and the working mode of middle plate rolling with proportional crown are introduced. Finally, the ways to improve the existing rough mill with CVC technology are discussed.
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