US Patent Application for METHOD FOR IDENTIFYING THRUST ...
There is provided a method for identifying thrust counterforce working point positions of backup rolls of a rolling mill, the method including: changing at least either friction c
There is provided a method for identifying thrust counterforce working point positions of backup rolls of a rolling mill, the method including: changing at least either friction c
Cluster rolling mill A cluster rolling mill is a special type of four-high rolling mill in which each of the two working rolls is backed up by two or more of the larger backup rolls which are able to roll hard materials. It may be necessary to employ rolls of a very small diameter but of considerable length to achieve the desired outcome.
Roll stand back-up rollers are precision machine elements that give optimum functioning and achieve their maximum operating only if they are precisely matched to the application. When new enquiries are received for roll stand back-up rollers, a wide range of technical data are therefore required in order to design the bearing arrangement.
The forged back up roll is a mill roll that supports the work roll and intermediate roll for the purpose of avoiding deflection of the work roll and affecting on the yield and quality of the plate and strip rolling mill. This is the key function of back up roll to ensure the operation of the whole rolling mill.
In the planetary mill type of rolling machine, a large backup roller is surrounded by a number of planetary working rollers as shown in the figure. Each planetary roll gives a continuous reduction. It is employed to reduce large thicknesses in a single pass of a steel strip.
Optimized roll diameter combination (small work, intermediate and back-up rolls) 'Work Roll Driven System' to achieve high flatness controllability; Development of a high strength small diameter spindle to drive the work roll ; Main Feature of HYPER UC-MILL. Optimized Combination of Work, Intermediate and Back-up Rolls
Rolling mill consisting of four rolls or known as a 4 High rolling mill is used for reducing material to extremely small thicknesses. Through the use of larger backup rolls, the issues of roll deflection can be avoided and smaller work rolls can be used.
FORGED WORK ROLL Doosan as an expert manufacturer of forged steel rolls has been supplying works roll for cold mills and back-up rolls which earn a good reputation around the world for the good quality and extremely long life. The most up-to-date technologies such as
Roll gap model Mill model Tension practices Model parameters Set-up values Adaption parameters Measured values Thickness, tension, speed Roll force, torque, temperature CVC, HS, position bending Coil-data Operator-trims Scheduling 400 350 300 250 200 150 100 50 0 0 0.5 1 1.5 2 Log deformation Yield stress 3542
Herkules dechockers are already in use for complete sets of back-up rolls at a plate mill with chocks of up to 260 tons. + Combination chock changing devices. include several platforms that are perfectly adapted to individual roll types. Both back-up rolls and work rolls can be accommodated. The combination chock changing devices are also ...
The back up roll is a roll that supports the work roll and is the largest and heaviest roll used in rolling mills. The roll can support intermediate roll for the purpose of avoiding deflection of the work roll and affect on the yield and quality of the plate and strip rolling mill.
Forged Steel Back Up Roll Definition. The forged back up roll is a mill roll that supports the work roll and intermediate roll for the purpose of avoiding deflection of the work roll and affecting on the yield and quality of the …
3 THE NEW BACKUP ROLL GRADE ASTI90X FOR SKIN PASS MILLS 3.1 Required Properties of Backup Rolls for Cold Mill Application Backup rolls in 4-hi and 6-hi mills have to provide certain properties in order to keep the rolling process as safe, constant and economical as possible. The achievement of good operational reliability,
morphologies for the case of a back-up roll, together with a summary of the crack propagation mechanisms, are shown in Figure 7. Experimental simulation The rolling contact fatigue and wear performances of a back-up roll steel were investigated during experimental simulations on the "SUROS" rolling-sliding testing machine at the
•Roll-strip contact length L •Average strip width w –despite the fact that spreading, or an increase in width, may actually occur if edger mills are not used •Average true stress of the strip in the roll gap Y avg •Assumes no friction and thus predicts lower roll force than the actual value •Power per roll (SI units)= pFLN / 60,000 kW
Mill rolls. Classifications: Strip mill rolls, section mill rolls, wire rod mill rolls, etc Application: 1. hot strip mill rough stand work roll 2. hot strip mill finishing stand work roll 3. hot strip mill back-up roll 4. groove-casted roll for section mill 5. universal section mill vertical ring 6. section mill work roll 7. section mill edge roll
Plate & Hot Mill Work rolls, back-up rolls Ø max. 2400mm + With and without chocks Paper Mill, Roll Makers, Other Special Applications For all roll and mill sizes CNC ROLL GRINDERS STEEL, ALUMINIUM, COPPER, SPECIAL ALLOYS. 5 Automatic Roll Shop packages at different level of integration AUTOMATIC ROLL SHOPS
Xtek's roll repair services can replace damaged slinger rings on backup rolls. Slinger rings can be replaced with a new hardened plastic material or with standard alloy steel varieties. This service can also include the reconditioning of the body-to-journal fillet radii, roll body end-face damage removal, and bearing journal weld repair.
Build up rolls with weld, Mill welded surface back down to required dimensions and finish, Machine journals to appropriate specifications and Machine keyway Roller after being completely rebuilt. It looks like new, and is ready to perform like new.
JTEKT started producing cylindrical roller bearings for backup rolls for Sendzimir mills in the 1950s and has continued to provide superior products for customers around the world. As regards to the backup rolls assembling products, which is the Key component of the Sendzimir mill, we concluded a production agreement for licensing with SENDZI-
The WHEMCO companies in Pennsylvania and Ohio, USA manufacture a full range of mill rolls – spun cast iron, cast steel and forged steel. We manufacture both cast and forged rolls for the most flat hot and cold rolling applications. We are now the sole producer of both cast work rolls and backup rolls in North America.
Forged Back Up Rolls for Hot and Cold Rolling Mills Manufactured by degassed steel in vacuum furnaces, these rolls show high levels of pureness. They are forged in hydraulic presses in order to achieve high levels of toughness.
PLATE MILL BACKUP ROLLS Forged Steel 82.6 inches maximum diameter 360 inches maximum overall length 166 tons maximum finished weight PLATE MILL WORK ROLLS Horizontally Spun Cast ICDP and High Chrome Iron 53.1 inches maximum diameter 360 inches maximum overall length 59.5 tons maximum finished weight
Thrust blocks • The thrust blocks are used to increase the variety of different work roll (WR) and back-up roll (BUR) diameters to be used in one mill stand. It also reduces the change of shim plates. Furthermore large roll gap ranges can be covered even with a small gap setting cylinder stroke.
VCR back-up roll and negative work roll contour design for solving roll spalling and transfer bar profile problems in hot strip mill Since the invention of VCR in the 1980s, it has been widely used on back-up rolls in cold strip mills in China.22 However, its application on a hot strip mill back-up roll is still under development, and much work…
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Applications: plate mills, hot-strip mills, cold-rolling mills Description: Backup rolls weighing 7-90 tones made of alloy-forged steel with Cr content of 1,40-5,50% have an excellent combination of metallurgical and physical properties such as a compact porosity-free microstructure; good ductility and toughness values; high resistance to fatigue, wear and thermal cracking.
FB-5. 3%Cr Steel. Tandem Mill Back Up Roll. Reversing Mill Back Up Roll. General Use. FB-7. 5%Cr Steel. Tandem Mill Back Up Roll. Reversing Mill Back Up Roll.
Modern, efficient cold rolling mills can roll pickled sheets or strips at speeds of up to 4 m/s and tandem mills that are continuously working can produce up to 2.5 million tons of cold rolled steel annually. The advantages of cold rolling. Cold rolled products have the following advantages over hot rolled: greater dimensional accuracy
Used to roll both ferrous and non-ferrous metals, the Z-Mill is designed to make heavy reductions at high speeds. The 20-Hi roll cluster contains 12 rolls and eight backing bearing assemblies. A rigid, compact mill housing eliminates deflection of work rolls and produces a uniformly close gauge tolerance strip.