Back Up Mill Roll
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- Back Up Mill Roll
6 Rolling Mills Revamp: Roll Upgrades for Extreme Loads Figure 5: Roll load and fillet radius detail. Case Study – Existing Solution and Problem Description This application is performed on rolls of 2-HI mills, but could be extended to the back-up rolls of 4-HI mills. Figure 5 shows the roll load and current fillet radius detail.
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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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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.
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Tel: +86-21-56121183 +86-519-83553805. E-mail: service@tsroll Web Site:
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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.
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Back-Up Roll: 60Cr3Mo, 9Cr2Mo, 86CrMoV7, 70Cr3NiMo: 60 ~ 80 HSC: Sendzimir & Cluster Mill: Intermediate Roll: 5H12: 55 ~ 60 HSC: Work Roll: Cr12Mo1V1, Cr12MoVCo: 60 ~ 65 HSC: Forged Shaft: 42CrMo, 36CrNiMo4: 35 ~ 45 HSC: MBI Rolls, a division of M. Brashem, Inc., has provided the best value for quality, price and service to the steel industry ...
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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
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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.
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Fig 2 Typical 4-high stands showing various details. Pre-stressed mill stand – In a conventional rolling mill, the roller separating force which arises when the work piece bar is passed through the rolls is transferred through the backup rolls and their bearings to the mill house. In a pre-stressed mill stand, the two backup rolls are connected to each other by an …
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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.
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Two new types of rolls, VCR (varying contact back-up roll) and ASR (asymmetry self-compensating work roll), have been developed and used on the 1700 mm hot strip mill at Wuhan Iron and Steel Corp.
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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.
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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.
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cold rolling mill is of the type where shifting of both first intermediate and inner second intermediate rolls are possible. The rolls are numbered and defined as: 1. Work roll, diameter between 50-75 mm. 2. First intermediate roll (tapered), diameter between 90-105 mm. 3. Inner second intermediate roll (CVC roll), diameter between 177-182 mm. 4.
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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.
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Our Back-up Rolls are manufactured at our facilities in the US and the UK. Rolls for select and specialized applications may also be produced in Sweden. Our Back-up Rolls can be supplied in various grades to meet different hardness and wear resistance requirements. Main Roll Grades
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Planetary mill roll configuration – In this type of roll configuration, there are a pair of heavy back-up rolls surrounded by a large number of planetary rolls. Each planetary roll gives an almost constant reduction to the feed material as it sweeps out of a circular path between the backup roll and the feed material.
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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 …
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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-
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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
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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 ...
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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
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Cast Back-up Rolls. TS Rolls Cast Back Up Rolls are produced to a high hardness level of up to 75 HSC through a Differential Hardening process. The superior wear and mechanical hardening resistance are related to the bainitic / martensitic matrix and complex carbides finely distributed. In the Differential Hardening process the monoblock rolls ...
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Roll-gap Control is performed by the hydraulic cylinder connected to a wedge built in the rear side of the back-up rolls of the lower housing. Mill housing receives rolling load directly through the wedge, so that a high-rigidity hydraulic push-up is possible.
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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
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Psrolls - We are manufacturer of rolls and roll assemblies complete with bearing assemblies & other components manufacturing. cold mill rolls, work rolls, backup rolls, backup rolls sleeves, induction hardened rolls. rolls for cold rolling mills, hi rolls, hi rolls, skin pass rolling mill work roll, drive rolls, cold rolling mill rolls, cluster ...
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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
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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.
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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.
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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
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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
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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
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•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
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Upper roll chock has a support with an additional lining for holding up the top roll when the rolling mill is idling. In a four high mill, there are four types of roll chocks namely (i) top back up roll chock, (ii) top work roll chock, (iii) bottom work roll …
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