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Dec 24, 2018· 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
Oct 24, 2001· In tandem cold rolling mills, strip is rolled on a continuous production line, passing from one mill station to another at high speed without stopping in between the stations. A standard tandem mill will contain about 4–7 individual mill stands as shown in Fig. 1. While operating tandem cold rolling mills, it is observed that the products to ...
The 4-stand, 4-high tandem mill is used for making a single product for the automotive industry but the 5-stand mill ... Back-up roll 1422 mm 1200-1365 mm Strip thickness
Due to the reversing rolling passes, production efficiency is lower than that of a tandem mill. However, because the rolling parameters can be quickly changed for each coil, reversing cold mills are especially suitable for the small-lot production of various product types. The size of the mill equipment is also smaller, which allows easier ...
Mill chatter in tandem cold rolling mill is a major rejection to the quality and production of the strips. In most mill vibration models, either the roll mass is usually limited to vibrate in vertical direction and vertical-horizontal directions, or the multiple rolls system is simplified to a single mass system. However, the torsional chatter is also a typical type of mill chatter, and the ...
Our range includes work rolls and back up rolls for hot roughing, reversing, and tandem rolls, cold breakdown rolls, finishing rolls, and foil rolls. Aluminum mill rolls are manufactured at our facilities in the US and Slovenia. Main Roll Grades . The following table gives a general overview of our main grades in this product segment.
In 1985 the oil film bearings for the back-up rolls of a 5-stands tandem cold mill (installed in 1954) were replaced by the rolling bearings (4-row cylindrical roller bearings). Since then many tandem cold mills built before 1980 have been modifi ed by replacing the oil fi lm.
Udstyret med en af de bedste back up roll mærker, Kaida Roll gruppe er en konkurrencedygtig hud pass mill roll, temperament mill roll, tandem mill roll producenter og leverandører i Kina, velkommen til at besøge vores hjemmeside. Smedet stål back-up roll er hovedsagelig anvendes i 4-Hej mill og 6-Hej mill.
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.
Our Precis. Founded in the year 2011, we, Bajrang Tools And Rolls Pvt. Ltd., are a distinguished Manufacturer, Supplier and Exporter of a broad range of Cold Rolling Mill Rolls and Hot Rolling Mill Rolls used in mills. These products are widely used in the metal forming industry owing to their robust design, outstanding performance and minimal maintenance.
Jul 16, 2019· In this type of rolling mill, each of working roll is backed up by two or more larger backup rolls. These rolls are arranged as shown in figure. This rolling mill are used in rolling hard thin materials. For rolling hard thin materials, it may be necessary to employ work rolls of very small diameter but of considerable lenght . In such cases ...
The cluster mills consist of two working rolls with small diameter and four or more backup roll with larger diameter. The number of back- up rolls high as 20 or more depends upon the support heeded for the working roll. It cluster mill is used for cold rolling process. Application of rolling process:
Extensive range This market segment covers forged Work Rolls and Intermediate Rolls for use in Wide Cold Strip Mills of 2-high, 4-high, or 6-high types, including reversing Reduction Mills, Tandem Mills, Double Reduction Mills, and Temper/Skin Pass Mills. Our Rolls can be supplied in a number of grades to suit various applications, materials, and rolling conditions.
Tandem mills – A tandem mill is a type of 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. ... These back up rolls have a further set of backing rolls in the third tier. Sendzimir ...
Add: No.66 Xingwang Rd, Dong'an, Huangli Town, Changzhou, China Tel: +86-519-6969 5301 Fax: +86-519-6969 5305 E-mail: sales@kdroll
Premature failure analysis of forged cold back-up roll in a continuous tandem mill
Nov 12, 2013· two back-up rolls and two work rolls. A common prob-lem is the back-up and work rolls are not perfectly circu-lar in shape. In other words, the rolls are eccentric. The roll eccentricity effect will, under normal constant oper-ating forces, result in steel strip with undesirable thick-ness deviations 1]. Fuzzy logic provides an inference
Abstract: For gaining strip edge drop controllability and increasing roll grinding precision, the edge drop control work roll (EDW) was developed and designed in 1700 mm tandem cold rolling mill. During the rolling trial, the roll configuration between EDW and conventional backup roll didn't match well because of the large fluctuation of ...
The arrangement of cluster mill is shown in Fig. 2.9 (d). Type # 5. 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 ...
As a conversion of a 4-High mill to a "dedicated" Z-High® mill and optionally widening the mill at the same time. As a new Z-High® mill with smaller diameter back-up rolls, smaller chocks and smaller mill housings due to reduced RSF requirements of the Z-High®, as compared to 4-High mill .
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.
proper roll cooling, the required thermal roll crown can be controlled in way to influence the overall roll profile. It is common practice adjusting the roll cooling to the strip width being rolled. Roll cooling is hence an actuator to allow stable rolling conditions of the mill. This is particular true for strip tandem rolling mills with regard to
Figure 19: Trials (T1-5) of forged HSS work rolls in the first two stands of a 5-stand cold rolling tandem mill (steel grades: H300LA and MBW 1500, HSS = forged High Speed Steel rolls, SSt (HV) = standard
coupled pickling line & tandem cold mill High-capacity production of high-quality products For a wide range of products, the required strip thickness, flatness and surface quality can be achieved more economically by linking the pickling and cold-rolling processes.
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