Correcting Camber in Roughing Process of a Hot Strip Mill Han-Kai Hsu and Jong-Ning Aoh * Advanced Institute of Manufacturing with High-Tech Innovations AIMHI, Department of Mechanical Engineering, National Chung Cheng University, Minhsiung, Chiayi 62102, Taiwan; [email protected] * Correspondence: [email protected]; Tel: +886-5-272-9218
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ing mill and the finishing mill, and utilizes the edger as a straightening machine As a result, wedge is reduced to a minimum, and camber formation is avoided alto-gether—as are cobbles while threading and tailing out In order to control both wedge and camber, several components of the solution are ingeniously interlinked
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It is the first plant in India to use the Corex technology for hot metal production The first Hot Strip Mill at Vijayanagar was commissioned in 1997 Since then it has grown exponentially and now has an installed capacity to produce 10 MTPA of steel Located 380 kms from Bangalore in Toranagallu, North Karnataka - a part of the Bellary-Hospet .
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(2017) Mechanism generating deviations in the rolling load and strip camber on the plate rolling mill Ironmaking & Steelmaking: Vol 44, No 9, pp 707-711
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Camber, The unkind Curve Understand how Camber can be handled in a typical Tube Mill: By WB “Bud” Graham, Contributing Writer Ok, were going to talk about curv Not the one seen in a ball game but the ones you encounter in the slit to width strip you convert into welded tube The most commonly encountered strip shape problem is camber
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Featur Mill types: 4-high work roll shift mill; 4-high Pair Cross mill (PC mill) with on-line roll profiler and dynamic PC option for dynamic Automatic Profile and Flatness Control (APFC) High-speed threading: 2m/sec or higher to maintain top and tail temperatur Short gap time: Time between passes less than 3 seconds except first two pass
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c for camber coordinates t = maximum airfoil thickness in tenths of chord (ie a 15% thick airfoil would be 015) m = maximum camber in tenths of the chord p =position of the maximum camber along the chord in tenths of chord 3 Calculate the thickness distribution above (+) and below (-) the mean line by plugging the
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Cambering of rolls is one of the most common solutions to alligator cracking By applying the camber on rolls in the opposite direction, the surface in contact with the sheet becomes flat after a deflection Wavy Edges One of the most common rolling defects is the occurrence of fibers at the edge, which are longer than those at the center
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Oct 14, 2020· The importance of the camber angle has to do with how stable it makes the vehicle on the road, particularly when making turns around corners The general consensus is that a positive camber is good for keeping a recreational vehicle stable, while a negative camber is better for allowing high-performance vehicles to turn corners faster and more .
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• Natural mill camber, which is a slight camber present in a beam when it is received from the mill, will exist in most beams • If the natural mill camber is at least 75% of the specified camber, no further cambering by the fabricator is required • If camber is not specified, the beams will be fabricated and erected with
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• Grind rolls with a camber to prevent crowning of the rolled strip • Radius of maximum camber point generally 025 mm greater than at roll edges , high; (d) cluster (Sendzimir) mill Tandem Rolling Tandem Rolling h 0 V 0 w 0 h 1 V 1 w 1 h 2 V 2 w 2 h 3 V 3 w 3 h f V f w f h 0 h 1 h 1 h 2 h 2 h 3 h 3 h f h 0 h 1 h 2 h 3 f V 0 V 1 2 3 V f
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Jul 13, 2021· Defect #5: Camber Coil camber is when the edges of the material are stretched on one side and curve slightly to create edges that are not parallel To see if a coil has a camber, lay a piece of the coil flat on the ground, then put a straight material (such as a piece of lumber, pipe, or another linear object) up against the edge
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Feedback Control for Hook, Camber, Wedge and Strip Steering in a Hot Strip Mill Matthias Kurz 1, Klaus Löhe, Niklas Petrasch2 1Primetals Technologies Bunsenstraße 43, ,
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both camber and sweep Thus for a 30’-long beam, the general permissible varia-tion from straightness would be 3/8” There are exceptions for shapes used as columns and for sweep in beams with a narrow flange See ASTM A6 for more comprehensive information on mill tol-erances of steel shap On some occasions mill material is
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Sep 07, 2005· They're MILL CAMBER, not camber put in by the fabricator The upcoming Manual will have an improved discussion of this Look in the 3rd Ed LRFD Manual Code of Standard Practice More useful information is given there I did an experiment a few years ago to test camber accuracy, although admittedly in a statistically-insignificant way
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ances for natural mill camber are described in ASTM Specification A6 This standard gives a maximum natural mill camber or sweep for any beam as 1⁄8” times the length of the beam in feet divided by 10 For a 30’ span this works out to be 3⁄8” Members specified with no camber must be erected with any natural mill camber in the up .
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Steel, Strip, High-Carbon, Cold-Rolled, General Requirements For1 This standard is issued under the fixed designation A 682/A 682M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year of last reapproval
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In this paper the possibility of exploiting in a closed-loop framework a camber sensor with advanced control techniques for the camber compensation at ,
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ASTM A242/242M-04 (2009), Standard Specification for High-Strength Low-Alloy Structural Steel ASTM A307-07b, Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength ASTM A325/325M-09, Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi [830 MPa] Minimum Tensile Strength
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The rolling mill that reduces a hot slab into a coil of specified thickness; the processing is done at a relatively high temperature (when the steel is still “red”) Hot Roll 1 Product that is sold in its “as produced state” off the Hot Mill with no further reduction or processing steps aside from being pickled and oiled (if specified)
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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 (453 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 ,
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You'll appreciate X-Roll ® hot strip mills from SMS group as all-round plants for high-quality hot strip They are designed to produce flat steel from thin strip with a minimum final gauge of 12 millimeters to high-strength pipe steels up to 254 millimeters ,
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A twin stand mill with a rougher stand before the steckel mill is suitable for an output of 800,000 tonnes a year Featur Mill types: 4-high work roll shift mill; 4-high Pair Cross mill (PC mill) with on-line roll profiler and dynamic PC option for dynamic Automatic Profile and ,
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The choice of a specific high-strength steel depends on a number of application requirements including thickness reduction, corrosion resist-ance, formability, and weldability For many applications, the most impor-tant factor in the steel selection process is the favorable strength-to-weight Art-3bqxd 10/23/01 4:39 AM Page 194
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Camber - Hot rolled products - Rolling defects Carbon deposit - Temper mill - Rolling defects Casting defect and crack in hot rolled round billet - Rolling defects , Internal LME during hot rolling of this high-Cu bearing structural steel II - Rolling defects Internal defect in rolled part - ,
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Jan 14, 2017· Mill spring is a defect in which the rolled strip is thicker than the required thickness since the rolls get deflected by high rolling forc Elastic deformation of the mill takes place during rolling Mill spring can be avoided, if stiffer rolls are used which means that the roll material is having high stiffness or elastic constant
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Aug 01, 1998· Pilot plant trials were performed according to an experimentally designed plan, to verify the calculations The experiments were planned so that a large camber would be obtained A total of 20 strips were rolled in MEFOS’s four-high pilot mill The mill specification and the conditions for the experiments are listed in Table 1 Two pairs of .
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Roll wear, along with deformation in the mill and the plasticity of hot steel may also cause variations from the published dimensions of rolled structural shap Therefore, to meet camber or sweep tolerances, they may need straightening by the producer Other tolerances are subject to negotiation with Nucor-Yamato Steel
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The extremely high centrifugal forces of planetary ball mills result in very high pulverization energy and therefore short grinding tim The PM 400 is a robust floor model with 4 grinding stations You may also be interested in the High Energy Ball Mill Emax, an entirely new type of mill for high energy input The unique combination of high .
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6 Mill Order – the actual final purchase order for the mill or manufacturer based on quantities derived from the production of certain steel shop drawings This order replaces or confirms the advanced bill Moment – a force in of steel that is caused by an applied load causing a structural element to want to rotate at a given point causing a moment
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