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tandem mill back up rolls

temper mill - wikipedia

the mill stand can be work roll driven or back up roll driven. the mill can be designed with hydraulic work roll bending or back up roll bending. installations typically have a single rolling mill stand but may have two. pinch rolls provide back tension for the pay off reel in the entry section and entry and exit tension for the temper pass.

rolling mill backup rolls manufacturers and suppliers ...

equipped with one of the best back up roll brands kaida roll group is one of competitive skin pass mill roll temper mill roll tandem mill roll manufacturers and suppliers in china welcome to visit our website. forged steel back-up roll is mainly used in 4-hi mill and 6-hi mill. the diameter of roll …

premature failure analysis of forged cold back-up roll in ...

it was observed [6] that spalling cracking metal in rolling mill operation a four roll high stand tandem mills pick up and subsequently strip welding are three critical factors including two work rolls and two back-up rolls are used to reduce responsible for the poor service life of back-up and work rolls dur- force and power of work roll as ...

tandem mill - sumitomo metal industries ltc

apr 21 1987· 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 …

backup roll contour of a smartcrown tandem cold rolling mill

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 ...

tandem cold mills (steel) | sms group

perfect for such an operation are sms group tandem cold mills - our powerful flagships in the cold rolling sector. you can operate them in either batch or continuous mode as ctcm (continuous tandem cold mill). optionally it's possible to arrange them inline as coupled pickling line tandem cold mills (pl/tcm).

cold mill rolls | work rolls | backup rolls | backup rolls ...

cold mill rolls work rolls backup rolls backup rolls sleeves induction hardened rolls rolls for cold rolling mills hi rolls skin pass rolling mill work roll : who we are: we are manufacturer of rolls and roll assemblies complete with bearing assemblies.

us4599883a - tandem rolling mill - google patents

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 ...

strip thickness control of cold rolling mill with roll ...

strip thickness control of cold rolling mill with roll eccentricity compensation by using fuzzy neural network waleed i. hameed khearia a. mohamad ... two back-up rolls and two work rolls. a common prob- ... the tandem cold rolling of metal strip is one process in a

premature failure analysis of forged cold back-up roll in ...

a 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 ...

what are main types of rolling mill? - mech4study

may 02 2017· tandem rolling is also known as continuous rolling in which two or more set of four high rolling mill arranged in a series in which each set is called stand. these stands are arranged so they can roll the work piece in decreasing cross section. it is used for rolling thick work piece in single pass.

mechanical engineering: types of rolling mills

it is a special type of four high rolling mill in which each of the two working rolls is backup by two or more of the larger backup rolls for rolling hard in materials. it may be necessary to employ work rolls of a very small diameter but of considerable length. in such cases adequate of the working rolls can be obtained by using a cluster mill.

genesis of spalling in tandem mill work-rolls: some ...

macroscopic investigations of spalled 3% cr-variety forged steel work-rolls used in the tandem mill of an integrated steel plant showed steel strip welding on roll surfaces. microstructural observations of roll samples at regions away from strip-welded zones showed the desired uniform dispersion of fine globular carbides in tempered martensite.

rolling process animation || rolling mill machine concept ...

oct 18 2017· rolling process animation || rolling mill machine concept by basic engineering ... tandem rolling mill ... in this type of rolling mill two or in some cases three backup rollers are used to ...

optimization-based automatic flatness control in cold ...

each rolling stand of the mill is composed of a stack of rolls. for a 6-high mill the rolls are named respectively work roll – wr (i.e. the roll in contact with the material) back-up roll – bur (the biggest roll at the top controlled by an hydraulic cylinder) and the intermediate roll – ir placed in the middle between the work and the back-up roll (see fig. 1).

analysis of premature failure of work rolls in a cold ...

analysis of premature failure of work rolls in a cold strip plant. ... a 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 ...

premature failure analysis of forged cold back-up roll in ...

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.

reversing cold mill - primetals technologies

reversing cold mill advanced reversing cold-mill technology from primetals technologies is an ideal solution for small- to medium-sized production capacities or for the rolling of smaller order lots of special steel grades.

tandem cold rolling mill - ijmetmr

the tandem cold rolling mill of metal ... often back up rollers are provided to increase the rigidity of the work rollers for ... the 5-stand tandem cold mill in tangent steel. rolling schedules can be possible with an even and uneven number of passes. work roll positive and negative

steel - forming of steel | britannica

steel - steel - forming of steel: forming processes convert solidified steel into products useful for the fabricating and construction industries. the objectives are to obtain a desired shape to improve cast steel’s physical properties (which are not suitable for most applications) and to produce a surface suitable for a specific use.

cold rolling of coil - youtube

mar 30 2014· there are five stands in this mill. each stand has a pair of work rolls and also a pair of back up roll for the support of work rolls. ... quality improvements at burns harbor tandem mill ...

tandem mill back up rolls in valparaiso

premature failure analysis of forged cold back-up roll in 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 …

rolls-forged rolls-backup rolls

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 deep hardness penetration : nbr : special material : continuous tandem mill back up roll : fatigue resistance wear control : nbx : special material : hot strip mill back up roll for high ...

us4658620a - tandem mill - google patents

a tandem mill has a plurality of stands and has at each stand one mill suitably selected from a common four-high mill a sleeve sliding mill an intermediate back-up roll shifting mill and a sleeve expanding mill.

rolls-forged rolls-cold mill rolls

tandem mill work roll reversing mill work roll skinpass mill work roll : general use : fh-15 : 5% cr steel : tandem mill work roll reversing mill work roll ... aluminum forged rolls; backup rolls; cold mill rolls; hi - tf rolls; intermediate rolls; sendzimer rolls; work rolls for 2-high rougher; rolls research and development. service ...

facilities 5stand cold reduction mill

each mill stand has two work rolls about two feet in diameter which are driven by powerful electric motors (totaling over 25000 horsepower) and sandwich the steel to reduce the thickness. in what is known as a ‘4-hi’ arrangement two back-up rolls around 4-1/2 feet in diameter prevent the work rolls from being distorted by the 1000+ tons of

tandem mill back up rolls - jarosek-sklepy.cz

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 ...

(pdf) mathematical modelling of roll wear in a tandem mill ...

while the surfaces of the backup rolls are not in direct contact with the slab the direct contact with the work roll generates a wear which is relatively small compared with the one caused on the work roll. because of this the backup rolls are run much longer than the work rolls up to 28 days with short mill shutdowns for surface inspections.

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