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FAG Rolling Bearings in Rolling Mills

the roll bodies is accompanied by removal of the chocks This is a demanding exercise in the case of non-separable bearings, such as spherical roller bearings, whose inner ring is fitted tightly on the roll neck In the case of cylindrical roller bearings, the chock can be removed together with the outer ring and roller cage from the inner...

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Chatter problems on a cold rolling mill

They looked for defects in the work roll bearings inner races that were likely to create similar markings to the ones experienced in the cold rolling mill, as shown in figure 3 These defects were present in all the mill work rolls and were likely created during the chocking and de-chocking operations...

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Statically determinate characteristics of ,

Jun 21, 2009 0183 32 Because the roll system of the mill is symmetric on either side of the foil, only the upper half of the roll system was used for analysis Fig 4a ω 0 is the WR rotation speed rotation of the BR at speed ω 1 is driven by contact friction force between the WR and BROn the operation side OS , the chock is constrained by the stand window in the horizontal direction and by the stop plate ....

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Teknointel Metal represents foreign machine manufacturers ,

Roll changing devices - use of an overhead crane and a unit designed to attach to the neck of the roll to be removed from or inserted into the mill Mill protection devices - to ensure that forces applied to the backup roll chocks are not of such a magnitude to fracture the roll necks or damage the mill housing...

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Sheet Camber and Cambering of Rolls Metallurgy

The middle of roll becomes hotter than its ends and hence roll diameter in the middle of roll increas In hot rolling mills this effect is quite pronounced and should be taken into account while calculating the roll camber In cold rolling mills the coolant supply at different points on roll surface may be adjusted to minimize this effect...

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The most advanced Aluminum Foil Mill Primetals Technologies

Our Foil Mills feature a number of automated systems for coil, spool, and scrap handling as well as high speed work roll change Operation and drive-side work roll latching allows for thermal expansion of the rolls to the operator side...

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4 High Rolling Mill

Rolling mill consisting of four rolls or known as a 4 High rolling mill is used for reducing material to extremely small thickness Through the use of larger backup rolls, the issues of roll deflection can be avoided and smaller work rolls can be used This reduction in work roll diameter Reduces overall separating force required for reductions...

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Home SNM Equipment

Laying Head Equipment - Morgardshammar Roll Changer Device Steel Plantech Scrap Cart Strip Support Assembly Top Deflector Pinch Roll Unit Weigh Scale Unit Contractual Manufacturing For Rolling Mill Spar Backup Roll Chocks Mill Guid...

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Introduction to rubber processing and safety issues

Lunn bar, fitted parallel to the mill rolls and positioned so that the operator works over it The Lunn bar has proved effective in reducing the number of fata l and serious maiming injuries at two roll mills from their historical level of about 20 per year in the 1950s - 60s, ,...

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SEALED ROLL NECK BEARINGS

including Timken Premium Mill grease, which is known for its excellent resistance to water washout Timken sealed roll neck bearings and seals are designed to work with different types of oil lubrication systems, as well Contact your Timken engineer for assistance with grease type, fill recommendations and applications in oil-lubricated systems...

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Succesful modernization of ALUNORF s Hot Rolling Mill 1

Aug 21, 2018 0183 32 SMS group provided the roughing stand with a new mechanical and hydraulic work roll adjustment system for fast roll gap adjustment with high positioning accuracy Part of the mechanical revamp was also the new back-up roll balancing system with new back-up roll chocks Also the mill stand service platform and the fume exhaust hood were replaced...

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Hot Mill Strip Mill Aluminium Foil / Coil Mill ,

Manufacturer of Hot Mill Strip Mill, Aluminium Foil / Coil Mill, 4 HI-MILL, 12 HI-MILL 20 HI-MILL offered by Varia Engineering Work Private Limited, Ahmedabad, Gujarat...

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China Work Roll, Back up Roll Bearing Chock

We have good references of supply chocks for different sizes of work rolls, intermediate rolls and back-up rolls in hot cold rolling mills 2 Advantage With well-equipped technology and perfect detection means, our products are high in quality and reasonable in price 3 Design Service...

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Work roll chock assembly for a rolling mill

The mill stand work roll assembly is supported within the windows of the mill stand housings between support blocks 14, 16 and the upper and lower backup rolls, not shown As seen in FIG 1, the work roll assembly includes at each housing an upper work roll chock 40 and a lower work roll chock 42 each having a cylindrical bore therein defining ....

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ROLLING MILL CHOCK REPAIRS AND FLEET MANAGEMENT

roll chocks as well as roller bearing chocks and work roll chocks for many of the major metals producers globally We also build new chocks and chock components to OEM and customer specifications Our products and services help steel and aluminum producers, bronze and brass mills achieve their quality and productivity goals and reduce...

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ROLL GRINDERS AND AUTOMATIC ROLL SHOPS

Cluster, Foil, Cold Mills Work rolls, intermediate rolls, back-up rings 216 max 450mm Cold Hot Mill Work and intermediate rolls 216 max 800mm With and without chocks Cold Hot Mill Work, intermediate and back-up rolls 216 max 1800mm With and without chocks Plate Hot Mill Work rolls, back-up rolls 216 max 2400mm With and without chocks...

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Hot and Cold Rolled Steel Explained

Roll changing devices - use of an overhead crane and a unit designed to attach to the neck of the roll to be removed from or inserted into the mill Mill protection devices - to ensure that forces applied to the backup roll chocks are not of such a magnitude to fracture the roll necks or damage the mill housing Roll cooling and lubrication systems...

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Roll Grinding Machine for US Aluminum Market

Pomini Tenova has been contracted by JW Aluminum to supply a roll grinding machine for work rolls and back-up rolls, a chock changer for work rolls and back-up rolls and a chock tilter for its expansion plant at Goose Creek, South Carolina USA Within its aim to increase its production in South Carolina plant with the installation of proven, state-of-the-art equipment utilizing green ....

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SMS group X

High-speed aluminum foil mills Roughing mill stands in wire rod mills , Our design team applies modern CAD software to create 3D models of the bearing complete with the chock and roll neck Just as crucial is detailed FEM analysis for optimal bearing components and backup roll necks , Our X-Roll ® Oil Bearing specialists work with your ....

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An innovative development of a four

Dec 01, 2013 0183 32 During foil or ultrathin strip rolling, elastic deflection variation of the work rolls at the contact surface with the strip causes non-uniform thickness distribution of the product in the width direction, which possibly causes a central wrinkling or an edge fracture on the product This study developed a four-high prototype rolling mill, comprising two work rolls fabricated from an ....

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PDF A JOURNEY TO OPTIMAL ROLLING MILL DESIGN FROM ,

monoblock mill Figure 8 c can provide man y advantages of high mill modulus, small work roll, mechanical advantage, precision AGC, and the like 13 The pre-stressed split housing mill ....

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Mechanics of Cold Rolling of Thin Strip IntechOpen

Nov 25, 2010 0183 32 24 Flattening between the backup roll and work roll Fig 5 shows the flattening between the backup roll and work roll It can also be found from Foppl model Ginzburg Azzam, 1997 that the flattening contact width between the backup roll and work roll is far less than the diameters of the work roll and backup roll, and it is suitable to calculate the flattening according to a semi ....

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Doosan Heavy Industries Construction

A work roll is a core part of a rolling mill that enters into direct contact with rolling material to make cold rolled carbon sheets CR of the desired thickness Back Up Roll A backup roll is the largest and heaviest roll used in rolling mills, and delivers pressure to and supports the work roll...

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Highest performing Hot Strip Mills Primetals Technologies

MSD is a hydraulic cylinder installed to mill housing window and press a roll chock against the opposite side with constant force MSD eliminates gap between roll chocks and mill housing, keep rolls in proper position and stabilize rolls...

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PDF Effect of Clearances in Mill Stands on Strip End ,

Jun 27, 2019 0183 32 In a four-high mill assembly, there are two pairs of work roll chocks and two pairs of backup roll chocks The work roll assembly can be removed as a unit from the work side WS of the...

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DESIGN AND OPTIMIZATION OF ROLLING MILL CHOCK

The roll chocks are broadly categorized into 4 types which is shown in fig 3Top Back up Roll Chock 1 Top Work Roll Chock 2 Bottom Work Roll Chock 3 Bottom Back Up Roll Chock Figure 3 Roll chocks Figure 2 Four high stand of reversing cold mill 4 Design of chocks The housing of a work roll or backup roll bearing is known as chock...

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Development of Cluster Mill Simulator for Thin Strip and ,

12-high, 20-high and other cluster mills Generally, foil products are manufactured in multiple paths by reducing the rolling load per path for harder materials by using small-diameter work rolls in cluster mills Our company has many actual achievements in thin and foil rolling mills However, the type of ,...

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Table of Contents Rolling Mill Bearings

Universal Beam Mill Large four-row tapered roller bearings, NSK KV type, are the most common bearings for work rolls in slabbing mills Their ability to support high radial loads combined with axial loads make them a perfect choice They have a loose fit with the roll and the housing and may be lubricated using grease, oil mist or oil-air systems...

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Mill Machinery Product

Manufacturer of Mill Machinery Product - Hot Mill Strip Mill Machine, Aluminum Foil Coil Mill Machine, Rolling Mill Machine 12 HI Mill and Rolling Mill Machine 6 HI Mill offered by Varia Engineering Work Private Limited, Ahmedabad, Gujarat...

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Troubleshooting roll defects

A progressive roll edge misalignment that can be concave or convex Observed only after the roll has started to be unwound Non-uniform cross-deckle caliper Reduce cross-deckle caliper variation Winding too soft at same radius of the roll with respect to other radius Control hardness of ,...

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