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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.
The diameter of the 6-high work rolls amounts to approximately 1:4 in relation to the barrel length. In comparison to a 4-high mill stand, the utilization range is wider. This type of rolling mill is mainly used in offline applications for cold rolling of soft and medium strip and for a wide range of strip widths.
The equipment in a three-high rolling mill becomes more complicated, because an elevator mechanism is needed to raise and lower the work [2]. Roll-work contact length is reduced with a lower roll radius, and this lads to lower forces, torque, and power. The four-high rolling mill uses two smaller diameter rolls to contact the work and two ...
Four High - For finish rolling of thin gage stock, heavy reductions on nominally thin gage material and precision tolerances. Six-High roll inserts are also available for narrow width ribbon and foil products. Combination- A versatile "two-in-one" type that permits both two-high and four-high rolling in a single mill.
The heart of the temper mill is the cold rolling mill stand which produces the temper pass. It will include electric powered drive motors and speed reduction gearing suited to the process desired. The design of the rolling mill can be a 2-high or 4-high (even 6-high in some cases). The mill stand can be work roll driven or back up roll driven.
* We offer Reversible or Non-Reversing 4-High Cold Rolling Mills, 6-High Cold Rolling Mills, Cold Rolling Mills Lines consisting of many machines and in configurations, according to request of the customers.Mills can be for carbon, alloy, SS stainless steel, aluminium, copper for secondary and finish rolling.
the rolling of steels and high-temperature alloys. When sticking occurs, the ... moment arm of one-half the contact length L. Thus, torque for each roll is Torque . e 6 ... Various rolling mill configurations are available to deal with the variety of . e. e processes. .
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 .
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 ...
Which of the following rolling mill types are associated with relatively small diameter rolls in contact with the work (two correct answers): (a) cluster mill, (b) continuous rolling mill, (c) four-high mill, (d) reversing mill, and (e) three-high configuration?
Rolling Mill Configurations The effect of roll diameter on length of contact for a given reduction. Smaller diameter rolls produce less length of contact for a given reduction and require less force to produce a given change in shape Smaller cross section provides a reduced stiffness Rolls may be prone to flex elastically because they are only supported on the ends
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 ...
Aug 09, 2017· Four high rolling mill Animation Muhammad Azharuddin Badi. ... How To Roll Up an Extension Cord!! CORRECTLY!!! ... Cold rolling - Pickling Line Tandem Cold Mill of JSW Steel Ltd - Duration: ...
Oct 04, 1983· A five-high rolling mill as claimed in claim 1, wherein said bore has a first diameter over the major part of the axial length of said intermediate roll and a second larger diameter over the remaining part of said axial length, and said arbor extends into said remaining part.
Hot rolling is a metalworking process that occurs above the recrystallization temperature of the material. After the grains deform during processing, they recrystallize, which maintains an equiaxed microstructure and prevents the metal from work hardening. The starting material is usually large pieces of metal, like semi-finished casting products, such as slabs, blooms, and billets.
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.
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.
It is known, in metal rolling practice, that the amount of roll force is reduced with a smaller radius of the rolls. Smaller radius rolls, however, deflect easier and must be supported by other rolls. The four high mill uses this principle with two smaller work rolls each supported by a larger backing roll.
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Before dual motor drives, rolls had to be ground the same diameter. If one roll needs to be ground, the opposing roll must be ground at the same diameter. 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.
conventional four–high mills, work roll bending providing a way setting to influence strip shape and flatness within limits is considered an improvement on the rigid roll contour, in conjunction with an on – line flatness measuring, a partial automation is possible. 4- Hi Mill Specification. Special Mill Features
Apr 22, 2012· (Roll forming: ) This film takes you through the processes within a hot rolling mill. You'll get to see the different stages all t...
Short stress rolling mill( rough middle rolling mill) is key part of steel rolling mill. We are the leader of steel rolling mill equipment from China with decades experience. We provide wide range of rolling mill, including bar & wire rod rolling mill, short stress mill( rough middle rolling mill), and so on.
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
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