Application Of Rolls For Cold Roll Mill

Rolls For Cold Rolling Mill – Loyal Road Inc.

Application for cold mills: 9Cr2Mo: 2% Cr: Work rolls for general 4 HI mill: MC3: 3% Cr: Work rolls and intermediate rolls for reverse cold mills. MC5: 5% Cr: Work rolls for tandem mill and skin pass mill

METALLURGICAL APPLICATION TO WORK AND BACK UP ROLLS …

23/11/1988· process will not be possible. It is advisable to maintain, just from the entrance of the rolls at the neutral point, a sufficient friction of the engine, but without getting to the threshold, since this would cause the seizure between roll and plate. The ideal would be, from the neutral point at the exit of the rolls, to diminish the friction.

Development and application of cold roll material - Taixi ...

Development and application of cold roll material. The development of roll material is representative of the development of cold roll technology. At present, there are four main series of cold rolling rolls commonly used in China, such as 2% Cr, 3% Cr, 5% Cr and SHSS (semi-high speed steel). In the past, the design and manufacturing process ...

GENERAL ASPECTS OF ROLL COOLING FOR HOT & COLD …

The so-called selective roll cooling is applied mainly for cold rolling mills to control the asymmetrical flatness deviations the strip width. There are furthermore across applications for special cast-rolling mills for narrow-gauge hot strip production. Normally, two rows of nozzles are used in one header. The row of nozzles directed to

What is a Cold Roll? - Cold Rolling Mill Rolls - Hani Tech

09/12/2019· The cold roll has a cold rolling work roll, an intermediate roll, and a support roll, the work roll is in direct contact with the rolling piece, the intermediate roll is only in contact with the work roll, and the support roll is in contact with the work roll and also in contact with the intermediate roll. Since cold rolling is cold rolling and the working conditions are bad, the quality of the cold rolling rolls is very strict. The cold-rolling rolls …

Metallurgy of Rolling mill Rolls – IspatGuru

13/11/2019· Fig 1 A pair of grooved rolls. Rolls are required to take all type of stresses, loads from normal and abnormal rolling conditions in the rolling mill and the stresses which are changing with roll wear during rolling. Rolls are required to carry out the heavy work of reduction during hot and cold …

A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING …

Rolls are tools used in rolling mills to reduce the cross section of metal stock. The weight of rolls may vary from a few kilograms up to 250 tonnes.

Fundamentals of Roll Cooling and Control of Flatness at ...

Fig 2, Heat Migration in Cold Mill Work rolls (Hotter regions shown in red) This localized heat input / output process results in a non-uniform distribution of heat, circumferentially around the roll and transversely across the roll body. Additionally the roll is subjected to …

Rolls For Cold Rolling Mill – Loyal Road Inc.

Application for cold mills: 9Cr2Mo: 2% Cr: Work rolls for general 4 HI mill : MC3: 3% Cr: Work rolls and intermediate rolls for reverse cold mills. MC5: 5% Cr: Work rolls for tandem mill and skin pass mill: Backup Roll. Forged steel back-up roll is mainly used in 4-Hi mill and 6-Hi mill. The diameter of roll barrel is 350~1800mm. The material of back-up roll includes 60CrMo, 9Cr2Mo, 86CrMoV7 ...

Development and application of cold roll material - …

Development and application of cold roll material. The development of roll material is representative of the development of cold roll technology. At present, there are four main series of cold rolling rolls commonly used in China, such as 2% Cr, 3% Cr, 5% Cr and SHSS (semi-high speed steel). In the past, the design and manufacturing process ...

What is a Cold Roll? - Cold Rolling Mill Rolls - Hani Tech

09/12/2019· Compared with the hot roll, the cold roll only rolls the cold-rolled piece, which is usually cast after smelting and often needs to be forged. With the development of casting technology, the cold roll is forged. It is being implemented continuously. The cold roll has a cold rolling work roll, an intermediate roll, and a support roll, the work roll is in direct contact with the rolling piece ...

Metallurgy of Rolling mill Rolls – IspatGuru

13/11/2019· Back up roll, Cast roll, Chilled iron rolls, Forged rolls, Roll barrel, Roll neck, Roll wear, rolls, Work roll, Metallurgy of Rolling mill Rolls. Rolls are implements or tools used in rolling mills to reduce the cross section of the material being rolled. They are highly stressed tools and are subject to wear. They are needed both for the rolling of sectional as well as flat products. In ...

Selection of Work Roll Diameter for Cold Rolling Mill*

drive the work rolls through the couplings and roll necks is limited by their diameters, which in turn are Table 1. Concept of choice of work roll diameter in cold rolling. Transactions Is", Vol. 23, 1983 (23) limited by the distance between their installed centers, i.e., by the minimum roll diameter envisaged after final regrinding. In other words, the maximum torque required by the rolling ...

Fundamentals of Roll Cooling and Control of Flatness at ...

roll bite and in a typical Cold Tandem Mill, work roll temperatures normally fall in the range of 55oC ... the thermal characteristics of different Mill applications are such that each system configuration is specifically designed to meet the thermal and lubricating requirements regardless of whether it is a DA system or an IDA system thus the application of modeling is key to ensuring the ...

K K Singh et.al., Detection of Defects on Cold Rolling ...

The work and back-up rolls in 4-high Cold Rolling Mill (CRM) are subjected to arduous service conditions. The complex nature of stresses that are generated on the surface and sub-surface regions of rolls are depicted in Figure 1 [1]. Detection of Defects on Cold Rolling Mill (CRM) Rolls with Ultrasonic & Eddy Current Flaw Detectors K. K. Singh, N. Mondal, R.B. Choudhary, A.K. Mishra, R. R ...

Rolling Process: Working, Application, Defects, Type of ...

In this mill, the three rolls stand in parallel one by others. The rolls are rotating in opposite directions. In this mill, between the first and the second rolls, the material passes. If the second roll rotates in a direction then the bottom roll rotates in another direction. The material is rolled both in forward and return in three high rolling mills.

Rolls for all types of Rolling Mills ... - Bharat Roll

Application : These Rolls are suitable for rolling medium and heavy sections. These rolls are also used for roughing stands of strip mill. Microstructure of Adamite roll, 45/50 ShC having spherodised pearlitic matrix. Magnification : 500X Alloy Steel Base Rolls / Adamite :

Application of Hot Rolling Lubrication on a Reversing Coil ...

Application of roll lubrica-tion could bring another benefit to the mill, i.e., reduction of roll wear. Most HSLA steels require thermomechanical control roll-ing to achieve the mechanical properties and high toughness under a low service temperature. Since the precipitation of micro-alloys occurs in rolling, the sep-arating force increases sharply due to the raised flow stress of metal, which ...

rolling operation or roll mill its types and application ...

25/11/2016· The smaller diameter rolls called working roll. Which is concentrate the total amount of rolling pressure over metal if the rolls are usually subsequent rolling of slabs. The common product of these mills are hot or cold rolled sheets and plates. tandem rolling mill or continuous rolling mill: tandem rolling mill …

Rolls for cold pilger mills-JIANGSU HERO WAY ROLLING …

In the cold pilger process, thick walled seamless tubes (hollow blooms) are finished to the required final size. The roll stand consists of two rolls that turn in reverse to the rolling direction. The roll profi le steadily reduces, in a taper, to the finished tube diameter. The tube is rolled over an internally located conical mandrel. It is essential that during the rolling of the hollow ...

Rolling Mills Rolls – IspatGuru

08/12/2013· roll life, rolling, rolling mill, rolls, Rolling Mills Rolls. Rolling had assumed importance in the industrialized world during the nineteenth century. Profiles and flats are hot rolled while some flat products are also cold rolled. Rolls are tools in the rolling mill. The weight of the rolls can vary from a few kilograms to as high as 250 tons. Rolls are required to carry out the heavy work ...

Life of rolls in a cold rolling mill in a steel plant ...

01/02/2000· Cold mill rolls should withstand mechanical and thermal shock, must have excellent wear resistance and very little plastic deformation. The premature failure of a cold mill roll increases not only the cost of the rolls but also the down time of the mill, affecting productivity. The reasons for premature failure of forged and induction hardened alloy steel work rolls can be attributed to the ...

Mechanics of Cold Rolling of Thin Strip | IntechOpen

25/11/2010· 2. Roll deformation of 4-high rolling mill. As symmetry of the mill about the mid-span of the rolls, the calculation process involves one half of a roll system. Given in Fig. 1, one half of the roll barrel and the strip are divided into m and n slab elements respectively. The rolling pressure, the pressure between the work roll and backup roll ...

K K Singh et.al., Detection of Defects on Cold Rolling ...

The work and back-up rolls in 4-high Cold Rolling Mill (CRM) are subjected to arduous service conditions. The complex nature of stresses that are generated on the surface and sub-surface regions of rolls are depicted in Figure 1 [1]. Detection of Defects on Cold Rolling Mill (CRM) Rolls with Ultrasonic & Eddy Current Flaw Detectors K. K. Singh, N. Mondal, R.B. Choudhary, A.K. Mishra, R. R ...

Hard chrome plating of work rolls for cold rolling and ...

I want to make a trial of chrome plating our work rolls that are used to cold roll carbon steel sheets. I need to know what would be the most suitable thickness of the hard chrome layer for the following operational conditions: 1- Pressure on roll: 1 ton on every 1 mm of the roll surface 2- Tension: 1200 N on the steel sheet 3- Mill type: 4 stands reversible mill 4- Thickness reduction: from 3 ...

Rolls for all types of Rolling Mills ... - Bharat Roll

Application : These Rolls are suitable for rolling medium and heavy sections. These rolls are also used for roughing stands of strip mill. Microstructure of Adamite roll, 45/50 ShC having spherodised pearlitic matrix. Magnification : 500X Alloy Steel Base Rolls / Adamite :

Rolling Process: Working, Application, Defects, Type of ...

In this mill, the three rolls stand in parallel one by others. The rolls are rotating in opposite directions. In this mill, between the first and the second rolls, the material passes. If the second roll rotates in a direction then the bottom roll rotates in another direction. The material is rolled both in forward and return in three high rolling mills.

Strip Thickness Control of Cold Rolling Mill with Roll ...

In rolling mill, the accuracy and quality of the strip exit thickness are very important factors. To realize high accuracy in the strip exit thickness, the Automatic Gauge Control (AGC) system is used. Because of roll eccentricity in backup rolls, the exit thickness deviates periodically. In this paper, we design PI controller in outer loop for ...

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