A tandem mill is a special type of modern rolling mill where rolling is done in one pass. In a traditional rolling mill rolling is done in several passes, but in tandem mill there are several stands (>=2 stands) and reductions take place successively. The number of stands ranges from 2 to 18.
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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
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.
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).
TANDEM COLD MILL Tandem cold-mill solutions from Primetals Technologies stand for high product yields combined with flexible production, low operational costs and simplified maintenance work. Depending on the product mix, the production capacity of continuous tandem mills from Primetals Technologies can exceed 1.2 million tons per year.
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.
Each mill stand has two work rolls about two feet in diameter, which are driven by powerful electric motors (totaling over 25,000 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
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.
In the tandem mill comprising a plurality of stands according to the present invention, a suitable mill taken from the group consisting of the common bendable roll four-high mill N, the sliding sleeve mill A, the intermediate back-up roll shifting mill B, and the expandable sleeve mill
Roll selection for Cold Rolling mills. 1. Tandem Mill Rolls. Pic.1 Five Stands Tandem Mill Rolling Line
The roll separating force on the 1-2-3-4 mill is distributed from the work rolls to the intermediate rolls and then to the backup shafts in such a fashion that the outer shaft takes a heavier force component, i.e., absorbs more load than the center shafts. The driven rolls in the mill are the outer second intermediate rolls.
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...
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.
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
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.
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
WORLD CLASS ROLLS OF THE HIGHEST QUALITY FOR OVER 100 YEARS. The WHEMCO companies in Pennsylvania and Ohio, USA manufacture a full range of mill rolls spun cast iron, cast steel and forged steel. Each of our roll manufacturing facilities has the expertise, equipment and experience to meet the most demanding rolling mill applications.
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
Apr 21, 1987 In the tandem mill comprising a plurality of stands according to the present invention, a suitable mill taken from the group consisting of the common bendable roll four-high mill N, the sliding sleeve mill A, the intermediate back-up roll shifting mill B, and the expandable sleeve mill C is selected and located at each stand.
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
It was observed  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
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
Typically, the number of backup roll cycles is as shown in Table I. TABLE 1 TYPICAL BACKUP ROLL CYCLES FOR DIFFERENT MILL TYPES MILL TYPE srAND PRODUCT NUMBER OF THICKNESS BACKUP ROLL (mm) CYCLES/PRODUCT Tandem cold mill First 0.3 100-400 Tandem hot mill First 2.5 10-25 Last 2.5 50-200 Plate mill Last 10.0 1-6 A review of previously proposed
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
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.
roll bite and in a typical Cold Tandem Mill, work roll temperatures normally fall in the range of 55oC 70oC with strip recoil temperatures and inter-stand strip temperature rarely exceeding 160 oC depending on product. Roll Bite temperatures in slower heavily drafted stands can peak in the region of 300oC, diminishing with the
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