Roll mill cobble

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Roll mill cobble

After a roll change or a mill stop rolls need some time to return to stable thermal conditions, every new bar entering the mill creates an impact, and sometimes there are really severe rolling accidents, due to faults by operators, weak rolled materials with internal defects, or because

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  • A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING

    After a roll change or a mill stop rolls need some time to return to stable thermal conditions, every new bar entering the mill creates an impact, and sometimes there are really severe rolling accidents, due to faults by operators, weak rolled materials with internal defects, or because

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  • And Thats Why You Keep Your Wits About You At The

    Jul 22, 2017 This is a "cobble," a steel mill mishap where a jam in the machinery leads to a pressure build up and a rope of hot steel getting thrown into the air Its not a huge problem, unless you arent looking when it happens

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  • Cobble In Rebar Mill caesarmachinery

    steel rolling mill jobs HOW DOSE A JAW CRUSHER WORK cobble aggregate crusher, steel rolling mill jobs cobble aggregate Find latest Rebar rolling mill Operator jobs at

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  • Cobble in Rolling Mill I Forge Iron

    Apr 01, 2011 The 51 2" billet enters #1 at about 2 mph and exits #18 as a 180 long railroad spike 1600 degrees travelling about 40+ mph So as you can imagine that it doesnt take a much of problem to cause a cobble I would guess that an average cobble takes about 30 min to clean up and get back to ru

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  • Cobble Plate Material engineering general discussi

    Mar 26, 2009 Cobble is when there is a malfunction in a rolling mill I would guess that the note means that this material can be any grade of steel and does not need to meet any specific gage requirements = = = = = = = = = = = = = = = = = = = = Plymouth Tube

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  • COBBLE RELIEF MECHANISM FOR ROLLING MILL SOUTHWIRE

    Jun 27, 1972 A cobble relief mechanism for a rolling mill of a continuous metal casting and rolling system wherein the accumulation of rod within the mill housing is relieved by opening a portion of the housing and allowing the rod to play out of the opening

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  • Cobbles: steel mill mishaps where hot steel reels

    Jan 23, 2018 Cobbles: steel mill mishaps where hot steel reels out like a nightmare light saber This is what happens when a bar that is being hot rolled in a steel mill es out of its normal rolling

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    COPPER COLD AND FOIL ROLLING MILL UCMMill and XMill Technology for thinner foil rolling For copper cold rolling and foil rolling, several types of mill are selected according to the rolling process, thickness and materials to be produced Our typical mill type is the UCMMill, which is suitable for ro

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  • Extreme manufacturing danger: the steel mill cobbl

    A cobble will occur when there is a roller malfunction, the line of steel deviates from the roller path or, as mentioned above, the end of the steel splits All of a sudden the continuous roll of steel will e to an abrupt halt although the steel behind is still being pushed through the working roller

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  • Mill Source Cobble Plate greenrevolutionorgin

    Steel mill cobble malfunction Spews a red hot payload all over the floor Steel mill cobble malfunctionglasseye Apparently "cobble" just means a malfunction in a rolling mill that results in the steel being spewed out somewhere it isnt meant to be Read more

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  • Most terrifying steel mill cobble ever : videos Re

    Edit: answering some mon questions from the other cobble I posted some months ago You clean up this mess with oxyacetylene torches, although I dont know how they got the loops of rod down from the crane roof beams its hanging from Most mills should have things called snapshears and chopping shears b

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  • Newfield Rolling Mill Machines

    Bar Section Rolling Mill Mill Stands Newfield manufactures high quality mill stands for rolling mills Mill stands are ultrasonic tested, stress relieved machined to close tolerances Mill stands are offered with options such as hydraulic prestressing, motorised screw down and motorised chock removal

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  • Operation of Rolling Mills Schweitzer Eng

    Operation of Rolling Mills Rolls Rolls are the tools of the rolling trade and the way they are used to execute their duty of deforming steel is in many cases largely determined by the roll pass designer The accuracy and speed of working and roll life are all related to his design and choice of ma

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  • PDF Reduction of Cobble Generation in Hot Strip Mi

    PDF Cobble generation during hot strip rolling adversely affects most of the technoeconomic parameters It affects mill utilization, material yield, mill productivity and specific heat

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  • PROCESS OF ROLLING MILLS LinkedIn

    Feb 25, 2016 A long product rolling mill prised of equipment for reheating, rolling and cooling speed matching the stand to achieve a constant mass flow through the mill assures a low cobble

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  • Report on Best Available Techniques BAT in the Ger

    Report on Best Available Techniques BAT in the German Ferrous Metals Processing Industry FINAL DRAFT DtschFranzsisches Institut fr Umweltforschung DFIU FrenchGerman Institute for Environmental Research University of Karlsruhe TH o Prof Dr O Rentz DiplWirtschaftsing Rainer Jochum, Dr Frank Schultmann

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  • Rolling Mill Control Russula

    Rolling Mill Control Unique process knowhow and the latest technology advancements applied to your rolling mills If a cobble occurs, the system automatically reacts to minimize the effects; manding the upstream shears to chop the existing bars blocking the furnace from sending another billet

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  • Rolling mill goes nuts : CatastrophicFailure reddi

    I dont spend my daytoday in rolling mills I almost did, was offered a job in hotrolling but went elsewhere From what I have seen, its best practice to stay away from the mills during rolling activity, and no matter where you are in a steel mill you need to keep your wits about you

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  • RP Smith Two Hundred Years of Rolling on the Brand

    which is often cited as the first rolling mill in America6 Built in 1751, it was powered by two water wheels one for the top rolls of the rolling mill and the slitting mill, and the other for the bottom rolls The layout of the mill is shown in Figure 27 Peter Oliver, a Crown Judge in the Province, b

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  • Steel mill cobble : CatastrophicFailure reddit

    Cobble: An incident when bar that is being hot rolled either jams in the mill guides, resulting in delays to reset the guides and rolls, or es out of its normal rolling trajectory, frequently landing often at high speed in the area adjacent to the rolling mill stands

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  • Steel Mill Cobble Neatorama

    Jan 23, 2018 In steel mills, the molten metal is passed through a series of rollers to mold it into the right size The steel is at 1200C 2200F or even hotter Occasionally, something will go wrong and you get a "cobble" A cobble will occur when there is a roller malfunction, the line of steel deviate

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  • US3672199A Cobble relief mechanism for rolling mil

    A cobble relief mechanism for a rolling mill of a continuous metal casting and rolling system wherein the accumulation of rod within the mill housing is relieved by opening a portion of the housing and allowing the rod to play out of the opening The housing is opened in response to the buildup of th

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  • What are the reasons of cobble in a Wire Rolling M

    Sep 10, 2009 Best Answer: Cobble is a very mon operational problem in long as well as flat products Steel CSP lines It is mainly because of mechanical setting errors in the mill Whenever the narrow bloom strip moves from mill caster to rolls extrusion point, both machines set delays

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