Roll changing means for a four-high rolling mill for automatically and rapidly changing top and bottom working rolls and top and bottom backup rolls without necessitating the use of a crane by combining a working roll changing truck and a backup roll changing truck in a double-sled shifted sidewise manner.
3 Four high rolling mill It has a roll stand with four parallel rolls one above the other. The top and the bottom rolls rotate in opposite direction as do the two middle rolls. The two middle are smaller in size than the top and bottom rolls which are called backup rolls for providing the necessary rigidity to the smaller rolls. A four high ...
4-HIGH COLD ROLLING MILL, in variety of sizes, reversing or non-reversing Work roll diameter 120 350mm dia. Back up Roll diameter 450 1050mm dia. R oll surface length 450 1450mm long. Max milling pressure 2400KN 12000KN
Abstract and Figures. In bar and wire rod mills, rolling procedures featuring three-and four-roll technologies are state-of-the-art to produce high-quality long products. While a rolling model for ...
Customers trust us because we make the rolling mill exactly as what they want.4-Hi cold rolling mill is very popular for reducing HR, pickled or non pickled, steel coil strip from 3mm to 0.2mm with steel strip width ranging from 300-800mm. The main composition of a four high rolling mill line
Jun 01, 2006 In modern four-high rolling mills, adjusting the shape of the roll face by changing the temperature along its length is avoided on the other hand, in two-high hot rolling mills, the rolls are heated up with torches, which compensates for the contour convexity caused by the temperature increase, and the elastic deformation of the rolls caused ...
Dec 24, 2018 3.Four High Rolling Mills. The Four High Rolling Mills have a roll stand with four parallel rolls placed one above another. 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.
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
mill, four-high rolling mill, six-high rolling mill and the Sendzimir mill are all common equipment for ... Work roll diameter roll length mm mm F 80 1677
Jun 04, 2013 This roll configuration is used for the rolling of the shaped rolled products in grooved rolls. The drive of these mills normally include a fly wheel. Four-high mills In the four high rolling mills, the roll configuration consists of four horizontal rolls, mounted in a single vertical plane.
9. A 4-high rolling mill according to claim 8, wherein n is between 2.0 to 2.5. 10. A 4-high rolling mill according to claim 8, wherein a maximum shift amount of said roll shift device is about 12 of the difference between a maximum and a minimum width of the material to be rolled. 11.
Sep 12, 2008 The new method is now applied to simulate the deflection in a 4-high rolling mill and compare the predicted strip profile with that obtained using a large-scale, commercial finite element analysis FEA package. Partial symmetry of the 4-high roll configuration is exploited, leading to an upper half model of the mill.
In order to analyze the influence of technical parameters on work roll axial force of four-high continuous variable crown CVC mill, the deformation analyzing model with top roll system and strip was established based on influence function method. Then a CVC work roll curve designing scheme was proposed and it was carried out on some cold rolling mill considering the requirement of ...
MACHINE 13826 5 127mm Diameter x 8 203.2mm Face Stanat TA-312 24 High Rolling Mill Manufacturer Stanat Machinery Co., USA Model TA-315 Size 5 x 8 Type
Oct 27, 2020 TP rolls are used for hot rolling mills whose back-up rolls have a large barrel length. TP rolls can also easily be installed in 2-high rolling mills, in which shape control actuating devices cannot easily be installed because it is not possible to apply the work roll bending.
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. This reduction in work roll diameter Reduces overall separating force required for reductions
The 4-high mill is equipped with positive and negative work roll bending in order to influence the shape and the flatness of the strip. Either the work roll or the back-up roll is driven, depending on customer requirements. The diameter of the 4-high work rolls amounts to approximately 14 in relation to the barrel length.
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
Nov 28, 2016 A 4-high rolling mill can be a small mill or a stand-alone, high torque, high reduction mill. A typical reversing mill has a quick change roll system. Four-high mills can be equipped with roll bend and shape control, a precision consistent product. Old 4-high cold rolling mills can be upgraded.
Modern four-high mills all set corresponding offset value 1, 2, such as 2050 CVC four-high rolling mill and 4300-medium plate mill of the German SMS, four-roll rolling mill of the British DAVY, 1580-pair cross four-high rolling mill of Japan Mitsubishi heavy industries. But these modern four-high mills with offset all have roller parallel ...
Oct 01, 1996 Changes in roll-gap shape in the case of vibrations in a four-high rolling mill stand. Author links open overlay panel W. Dobrucki a A. Bar b. Show more. Share. Cite. ... VD and at the moment t 13 ms the width of the strip is 1500 mm the length of the roll-face is 1700 ram Point on the roll-face Amplitudes of the model of vibration ram ...
Four-high mills are very common for steel, aluminum, copper, and any high production metal rolling. One disadvantage of a 4-high mill is that the edges of the material tend to elongate. There is no supporting surface at the edges. Even though the roll is equipped with roll bend, a complicated roll shape may be necessary to eliminate elongation ...
The first rolling stand of the mill is a two high reversing rolling stand having roll diameter of about 900 mm and barrel length of 2300 to 2500 mm. It rolls the bloom to required size for starting the profile passes. Rough pre-forms may also be rolled in this stand. The billet is then rolled in three high rolling
Multi-High Rolling Mill The multi-high rolling mill consists of two small diameter working rolls, a row of intermediate driving rolls, and a raw of backup rolls. This arrangement involves a cluster of either 12 or 20 rolls, resulting in exceptional rigidity of the whole roll system.
The production equipment of four-high mill level rolling cycle shaped steel has the common pass structure of forming of symmetrical two lace edging rolls and upper and lower horizontal roll Left and right lace edging roll is to be made of two identical solid cylinder revolving bodies, and periodic distribution projection measure-alike, strip ...
Roll changes on such mills are relatively frequent and time consuming. This type of mill is therefore used for primary rolling where rapid change of shape is required, even at the expense of surface quality. Four-high mills are a special case of two-high, and in an attempt to lower the rolling load, the work roll diameter is decreased.
Fig. 1. Edge contact of work rolls and Slit beam deflection mode for a 4-high rolling mill 2. Roll deformation of 4-high rolling mill As symmetry of the mill about the mid-span of the rolls, the calculation process involv es one half of a roll system. Given in Fig. 1, one half of the roll barrel and the strip are divided into www.intechopen.com
Jun 09, 2017 A rolling mill is the place where the rolling of steel in carried out. It consists of one or more rolling stands along with some auxiliary equipment where auxiliary operations associated with the rolling of steels are performed. Rolling of steel in small and medium sized rolling mills is generally carried out in cross-country rolling mills.
The conversion allows the standard 4-high rolling mill design to roll lighter gauges without the many deficiencies of a 4-high rolling mill. Our current equipment include 26 x 72 2-High Lewis wRoll Bend 3.5 x 16 x 20 American 4-High wTerminal Equipment 16 x 20 x 48 4-High 23,000 HP DC Drives
Four-High A 4-HI mill may be used for finish rolling of thin gauge stock. 6-HI roll inserts are also available for narrow width ribbon and foil products. Combination A combination rolling mill is a versatile two-in-one type of metal rolling mill that permits both 2-HI and 4-HI rolling operations.
A Tandem roll mill is the rolling process arrangement in which four high mills are in synchronization one after another. The product undergoes each one of them, which provides a reduction in thickness. Tandem rolling mills. In this arrangement, each mill is known as a
Four High Rolling Mills In this type of mill, there are four parallel rolls one by another. In this operation, the rotation of the first and the fourth rolls take place in the