Tandem Mill Back Up Rolls

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Roughing mill (reverse mill) Finishing mill (tandem mill) Cold rolling mill Cold rolling Non-reversing 4-HI rolling mill Process annealing (Note) : Back up roll: Work roll Plate Disk Narrow strip Foil Cutting & correction Cutting Blank Slit Non-reversing 4-HI rolling mill Foil rolling Cold rolled coil Annealinga b s t r a c t In this paper, premature failure of a forged back-up roll from a continuous tandem mill was investigated. Microstructural evolutions of the spalled specimen and surface of the roll ...


Complete line projects include Coupled Pickling & Tandem Cold Strip Mill (PL-TCM) for POSCO Gwangyang Works and Bridle & Steering Unit line for POSCO VST STS SPL. Equipment supplied includes Leveler Roll Assembly for Steel Dangjin Works, Back Up Roll Assembly at JFE Steel Chiba Works, and Pinch Roll Assembly at Dongkuk Steel Dangjin Works.As a result the performance of back-up roll and thus availability of mill will be improved while specific costs for mill will drop. This quite ... Compared to the typical reduction of the strip in a tandem mill, the amount of reduction in skin pass process is quite low and commonly in the range of 0.1 to 1.5% (exceptionally up to 3%). ...


Forged Steel Rolls. Lehigh Heavy Forge produces a full range of forged work rolls, back-up rolls, and specialty rolls for ferrous and nonferrous rolling mills. Our forged rolls are unsurpassed in strength and reliability. No matter the application, Lehigh Heavy Forge manufactures forged steel rolls to your exact metallurgical and dimensional ...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. High Hardness.


The top and bottom rolls work in the opposite direction. The two in the middle are smaller than the top and bottom rolls, which are also known as backup rolls. 4. Tandem Rolling Mills. The Tandem Rolling Mills comprises of a set of two or three strands of roll set in parallel alignment.work rolls and back up rolls. 4-Row Cylindrical Roller Bearings Made from the cleanest steel that is treated and formed with the highest quality processes, including options like case carburized, carbonitriding and/or phosphate coating, for mill stand back up roll support in tandem mills and galvanizing/coating mills. 4-Row Tapered Roller Bearings


Enhancing the self-maintenance of the backup roll and the work roll After the FSR backup roll is used, the states of roll contact and roll wear are improved, and the contour of G.H. Yang et aL, Backup roll contour of a SmartCrown tandem cold rolling mill 361 the backup roll and the work roll in good self-maintenance is made, and the consumption ...Back Up Rolls for Hot Strip Mill. Rolls for Cluster Type & Sendzimir Mills. Forged Rolls. ... The current product range includes HSS rolls and super-HSS rolls for use in tandem mills that roll electrical steel sheet and other materials with high hardness for which there is strong demand as a result of factors such as the growing market for ...


What is claimed is: 1. A tandem mill comprising a plurality of stands, characterized in that the final stand is a sleeve expanding mill, at least one of the stands exclusive of the last stand is a sleeve sliding mill or an intermediate back-up roll shifting mill, and the other stands are common four-high mills.The larger rolls are called backup rolls. The smaller rolls are the working rolls, but if they would be thicker in the centre and thinner at either end. Backup rolls hold the working rolls and restrict deflection when the material is being rolled. The usual products of these mills are hot and cold plates and sheets. ... Tandem or Continuous Mill.


Tandem Mill Final Stand Roll : Less Roll Marks : FH-AC : Special Material : CGL Skinpass Mill Work Roll : Spalling Resistance under CGL Condition : SFH-20 : Special Material : Tandem Mill First Stand Roll Dull Finish Skinpass Roll : Dull Maintaining Wear Resistance : E61 : High Speed Steel : Hard Material Rolling Mill : Wear Resistance Abrasion ...Work rolls for tandem mill and skin pass mill: Backup Roll. Forged steel back-up roll is mainly used in 4-Hi mill and 6-Hi mill. The diameter of roll barrel is 350~1800mm. The material of back-up roll includes 60CrMo, 9Cr2Mo, 86CrMoV7, 70Cr3Mo, 5Cr5NiMoV etc. Nam e: Type of material:


Working Layer Composition. Hardening Depth mm. Roller Application. 3%Cr Series. ≥880. 50-65. Martensite (bainite) + Carbide. 40-60. Single stand mill, Cold & Hot rolling tandem mill.A spalled sample from a forged back-up roll used in a 5 stand 4 Hi tandem mill was investigated. The chemical composition and detailed specifications of the forged back-up and work cold rolls are given in Table 1, Table 2, respectively.The sample was washed thoroughly with running distilled water, rinsed and ultrasonically degreased with acetone and dried.


12. The tandem rolling mill of claim 11 including the smallest diameter backup roll having a diameter of about 85 to 90 percent of the largest diameter backup roll in said finishing train. 13. A tandem rolling mill comprising. a plurality of mill stands each having a pair of work rolls and a pair of associated backup rolls, and.Flat wire enameled wire precision rolling mill used to produce electric cars motors' flat wiresinfo@precision-rolls


Back Up Rolls: 60" (1524mm) Wide x 48" (1219mm) Diameter Work Rolls: 60" (1524mm) Wide x 20" (508mm) Diameter 5% - 75% Reduction Depending on Grade and Width Production Capabilities: 75-80,000 tons per month. 80 tons per hour. Mill Includes: Entry Coil Conveyor Coil Box Entry 4 Stand Tandem Cold Mill -Post Area: 27" (686mm) x 32" (813mm)Tandem mill rolls can be produced up to a maximum weight of 60 tonnes. The maximum finished weight limit for plate mill rolls is 170 tonnes. Tandem mill back-up roll can be supplied with barrel hardness levels within the range 55 to 75 Shore C. Surface hardness is constant throughout the working life of …


A tandem rolling mill having a plurality of stands with each stand having a pair of work rolls and a pair of backup rolls. A downstream roll stand has work rolls of reduced diameter and backup rolls of increased diameter with respect to an upstream stand preferably at least a major number of downstream stands have reduced diameter work rolls and enlarged diameter work rolls with respect to an ...The disclosure of this invention relates to a rolling mill wherein the chocks of the work roll on the drive side of the mill are split to enable the work rolls to be removed and replaced while strip is still being passed between the rolls. The chocks of the work rolls on the operating side are nested. The work roll chocks are provided with wheels which, during the roll changing operation, are ...


BACKUP ROLL BEARING TEMPERATURE MONITORING ON A TANDEM COLD MILL * Rogério Martins Pereira1 Lucas Gabriel Correa2 Charles Pierri de Souza3 Danilo Gonçalves de Oliveira4 Abstract The Tandem Cold Mill is composed by stands with rolls positioned so that the rolling force can be transmitted to the strip being processed.Tandem mill installed in 1970. D stand delivery end of 44 tandem breakdown mill. Work rolls and backup rolls from 43, and 44 mills await dressing in a roll grinder. Betts-Bridgeford roll grinding lathe, installed in 1980-1981. Machinist Tom Shultz measures roll with a micrometer prior to grinding.


NEW BACKUP ROLL GRADE FOR SKIN PASS MILLS* remarkably reduced roll wear while operating with textured work rolls. In the meantime several successful trials have been made with this new roll grade on different Skin Pass Mills. As a result the performance of back-up roll and thus availability of mill will be improved while specific costs for 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 plate and strip rolling mill. This is the key function of back up roll to ensure the operation of the whole rolling mill. The common materials are 9Cr2Mo, 86CrMoV7 ...


The above rolls are of following applications-•Hot & cold mills Back-Up rolls •Continuous & Semi-Continuous hot strip mills Back-Up rolls •Roughing 4-High stands Back-Up rolls •Cold tandem mills Back-Up rolls •Thick plate mill Back-Up rolls These rolls are characterized by the following properties : •Higher hardness penetrationDual Center Position Control (CPC) in operation at the entry sides of both the side trimmer and tandem cold mill (TCM) ensures an accurate center positioning of incoming strip. Furthermore, immediately prior to the No. 1 mill stand, a three-roll bridle roll restrains the strip and feeds it securely into the roll bite.


Hydrodynamic roll-neck bearings from SMS group are highly advanced and elementary components of modern rolling mill technology. That's because they support the load-bearing backup rolls. Even under extremely tough operating conditions, they ensure long roll service life and minimal maintenance outlay.Small rolling mills. fenn rolling mill machines are available in both 2hi and 4hi roll configurations and mills may be either work roll driven backup roll driven or a combination of both on one end of the spectrum 4hi rolling mills with work rolls are offered as small as 500 127mm in diameter.