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Backup roll contour of a SmartCrown tandem cold

01/06/2008  For the SmartCrown tandem cold mill, two aspects of work have been done: one is proposing the Smart-Crown plus work roll contour based on the optimization of the SmartCrown and the other is developing the new backup roll contour (flexible shape backup roll, in short FSR). The article will mainly discuss the FSR contour. 2. Spalling mechanism of the rolls According to the Hertz contact

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Fire Breaks Out at Steel Mill, At Least 7 Injured

WEIRTON, W.Va. (AP) _ A fire that ″spread from floor to ceiling within minutes″ injured at least seven people today at a Weirton Steel Corp. mill. The blaze broke out at 9 a.m. at the No. 9 tandem mill and was still not controlled at early afternoon, firefighter Shawn Bowers said. The mill rolls steel into sheets after impurities are removed.

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Analysis of Chatter in Tandem Cold Rolling Mills

backup rolls and torsion vibration of the drive system are the examples.1,2) ... findings at a five-stand tandem mill for tinplate, where chat-ter generally starts at No. 4 or 5 stand and appears more frequently with low rolling force by using polished rolls or excess lubrication. 4) On the other hand, Yarita et alvesti-gated chatter vibration at a three-stand tandem mill and they ...

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Genesis of Spalling in Tandem Mill Work Rolls: Some ...

The roughing mill withstood extreme service conditions with long service cycles for backup and work rolls, a large variety of the same width rolling campaigns, severe and non-uniform wear contours ...

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Tandem rolling mill - Wean United, Inc.

A tandem rolling mill having a plurality of stands with each stand having a pair of work rolls and a pair of backup rolls. A downstream roll stand has work rolls of reduced diameter and backup rolls of increased diameter with respect to an upstream stand preferably at least a major number of downstream stands have reduced diameter work rolls and enlarged diameter work rolls with respect to an ...

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Backup roll contour of a SmartCrown tandem cold

01/06/2008  For the SmartCrown tandem cold mill, two aspects of work have been done: one is proposing the Smart-Crown plus work roll contour based on the optimization of the SmartCrown and the other is developing the new backup roll contour (flexible shape backup roll, in short FSR). The article will mainly discuss the FSR contour. 2. Spalling mechanism of the rolls According to the Hertz contact

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Analysis of Chatter in Tandem Cold Rolling Mills

backup rolls and torsion vibration of the drive system are the examples.1,2) ... findings at a five-stand tandem mill for tinplate, where chat-ter generally starts at No. 4 or 5 stand and appears more frequently with low rolling force by using polished rolls or excess lubrication. 4) On the other hand, Yarita et alvesti-gated chatter vibration at a three-stand tandem mill and they ...

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Tandem rolling mill - Wean United, Inc.

A tandem rolling mill having a plurality of stands with each stand having a pair of work rolls and a pair of backup rolls. A downstream roll stand has work rolls of reduced diameter and backup rolls of increased diameter with respect to an upstream stand preferably at least a major number of downstream stands have reduced diameter work rolls and enlarged diameter work rolls with respect to an ...

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Backup roll contour of a SmartCrown tandem

Request PDF Backup roll contour of a SmartCrown tandem cold rolling mill SmartCrown was a new system developed by VAI for improving the strip profile and flatness control first applied in 1700 ...

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Rolling (metalworking) - Wikipedia

A tandem mill is one in which the metal is rolled in successive stands; Ford's tandem mill was for hot rolling of wire rods. Other metals This ... Backup rolls - are intended to provide rigid support required by the working rolls to prevent bending under the rolling load; Rolling balance system - to ensure that the upper work and back up rolls are maintained in proper position relative to ...

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Rolling Mill Backup Rolls Manufacturers and

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 barrel is 350~1800mm. The material of back ...

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Set-up optimization for tandem cold mills: A case study

2. Cosipa four stand tandem cold mill Cosipa cold mill is a coil to coil four high, four stand mill, in which each stand is composed by two backup rolls and two work rolls, the later coupled to dc motors controlled by digital speed regulators. Two hydraulics actuators, installed at the top of the stands, complete the set of reduction of each stand.

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(PDF) Premature failure analysis of forged cold back

In the present study the premature failure of a forged backup cold roll used for continuous tandem cold strip rolls was investigated. The main factors affecting the premature failure of the forged back-up roll were determined and analyzed [3,7]. Experimental procedureA spalled sample from a forged back-up roll used in a 5 stand 4 Hi tandem mill was investigated. The chemical composition and ...

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Rolls For Cold Rolling Mill – Loyal Road Inc.

Sendzimir Rolls aka. Cluster mill rolls, diameter ranges from 20mm to 340mm, maximum length of which can reach up to 2800mm. The categories of sendzimir rolls are composed of following: Work roll. 1st Intermediate Roll. 2nd Intermediate Roll. For Work Roll, we suggest following material: MATERIAL : M1 (AISI M1, DIN-1.3346) 1. Chemical ...

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white paperSuccessful Execution of Roll Cooling Strategies ...

coolant is also applied to the backup rolls. The pursuit of the theoretically ideal cooling system would further argue that if you are cooling the top rolls in this manner, the same should be done for the bottom rolls. What one would end up with is quite an expensive system (shown in Figure 1), which nonetheless can be functionally inadequate because even large quantities of sprayed water or ...

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Backup roll contour of a SmartCrown tandem

Request PDF Backup roll contour of a SmartCrown tandem cold rolling mill SmartCrown was a new system developed by VAI for improving the strip profile and flatness control first applied in 1700 ...

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Rolls-Forged Rolls-Backup Rolls

Reversing Mill Back Up Roll : General Use : FB-7 : 5%Cr Steel : Tandem Mill Back Up Roll Reversing Mill Back Up Roll : High Hardness Deep Hardness penetration : NBR : Special Material : Continuous Tandem Mill Back Up Roll : Fatigue Resistance Wear Control : NBX : Special Material : Hot Strip Mill Back Up Roll for High Speed Steel Work Roll ...

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Set-up optimization for tandem cold mills: A case study

2. Cosipa four stand tandem cold mill Cosipa cold mill is a coil to coil four high, four stand mill, in which each stand is composed by two backup rolls and two work rolls, the later coupled to dc motors controlled by digital speed regulators. Two hydraulics actuators, installed at the top of the stands, complete the set of reduction of each stand.

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811. Frequency analysis of chatter vibrations in tandem ...

backup roll is the most significant one. It is demonstrated that the upper backup roll and top housing are more sensitive to chatter than the work rolls and they are suitable locations for installing the permanent acceleration sensors for chatter warning system. Keywords: frequency analysis, vibration, rolling, chatter, experiment. 1. Introduction Cold rolling is the most vital process in ...

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Rolls For Cold Rolling Mill – Loyal Road Inc.

Sendzimir Rolls aka. Cluster mill rolls, diameter ranges from 20mm to 340mm, maximum length of which can reach up to 2800mm. The categories of sendzimir rolls are composed of following: Work roll. 1st Intermediate Roll. 2nd Intermediate Roll. For Work Roll, we suggest following material: MATERIAL : M1 (AISI M1, DIN-1.3346) 1. Chemical ...

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A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS

on wear is another issue. Stresses from Hertzian pressure in 4-high cold mill back up rolls were measured years ago, the results were never published, but of high interest - also, maybe later. K. H. Schröder July 2003 K. H. Schröder: A BASIC UNDERSTANDING OF THE MECHANICS OF ROLLING MILL ROLLS File: SCHROEDER_ROLLS_010703.DOC

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Tandem Cold Mill Scientific.Net

The proposed adaptive method has been applied successfully to a 1450mm 5-stand tandem cold mill. Application results show that the forecast accuracy of rolling force model has been improved significantly. 296 Simulation on Vertical Vibration of Six-Roller Cold Rolling Mill. Authors: Xu Ma, Xing Hui Zhu, Jian Wei Li, Jing Hong Yang, Quan Lu Yang, Li Sha Lv, Jin Duo Ye, Yan Hong Ding Abstract ...

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rolling operation or roll mill its types and

Four- high rolling mills or 4 high rolling mill; Tandem mills; Cluster mills. Two high rolling mill process: two high rolling mill diagram. It consists of two heavy horizontal rolls and which is mounted one over the other. Both the rolls are supported with bearing housed in sturdy upright side frame called stands. The gap between the rolls are adjusted by the upper roll move lowering when the ...

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white paperSuccessful Execution of Roll Cooling Strategies ...

coolant is also applied to the backup rolls. The pursuit of the theoretically ideal cooling system would further argue that if you are cooling the top rolls in this manner, the same should be done for the bottom rolls. What one would end up with is quite an expensive system (shown in Figure 1), which nonetheless can be functionally inadequate because even large quantities of sprayed water or ...

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Types of Rolling Mills Metallurgy - Your Article

The cluster mill consists of two working rolls and four or more backing up rolls. The number of backup or supporting rolls depends upon the amount of support required for the working (small diameter) rolls. Cluster mill is generally used in cold-rolling operation. The arrangement of cluster mill is shown in Fig. 2.9 (d). Type # 5. Multi-High Rolling Mill: The multi-high rolling mill consists ...

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Rolls-Forged Rolls-Backup Rolls

Reversing Mill Back Up Roll : General Use : FB-7 : 5%Cr Steel : Tandem Mill Back Up Roll Reversing Mill Back Up Roll : High Hardness Deep Hardness penetration : NBR : Special Material : Continuous Tandem Mill Back Up Roll : Fatigue Resistance Wear Control : NBX : Special Material : Hot Strip Mill Back Up Roll for High Speed Steel Work Roll ...

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Set-up optimization for tandem cold mills: A case study

2. Cosipa four stand tandem cold mill Cosipa cold mill is a coil to coil four high, four stand mill, in which each stand is composed by two backup rolls and two work rolls, the later coupled to dc motors controlled by digital speed regulators. Two hydraulics actuators, installed at the top of the stands, complete the set of reduction of each stand.

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811. Frequency analysis of chatter vibrations in tandem ...

backup roll is the most significant one. It is demonstrated that the upper backup roll and top housing are more sensitive to chatter than the work rolls and they are suitable locations for installing the permanent acceleration sensors for chatter warning system. Keywords: frequency analysis, vibration, rolling, chatter, experiment. 1. Introduction Cold rolling is the most vital process in ...

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Teknointel Metal represents foreign machine

These backup rolls are larger and contact the back side of the smaller rolls. A 4-high mill has four rolls, two small and two large. A cluster mill has more than 4 rolls, usually in three tiers. A tandem mill is a special type of rolling mill where rolling is done in one pass. In a traditional rolling mill rolling is done in several passes, but ...

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white paperSuccessful Execution of Roll Cooling Strategies ...

coolant is also applied to the backup rolls. The pursuit of the theoretically ideal cooling system would further argue that if you are cooling the top rolls in this manner, the same should be done for the bottom rolls. What one would end up with is quite an expensive system (shown in Figure 1), which nonetheless can be functionally inadequate because even large quantities of sprayed water or ...

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rolling operation or roll mill its types and

Four- high rolling mills or 4 high rolling mill; Tandem mills; Cluster mills. Two high rolling mill process: two high rolling mill diagram. It consists of two heavy horizontal rolls and which is mounted one over the other. Both the rolls are supported with bearing housed in sturdy upright side frame called stands. The gap between the rolls are adjusted by the upper roll move lowering when the ...

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mechanical engineering: Types of rolling mills

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.

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Combined operating modes and frame types in

The invention relates to a method for combining the operating modes of individual rolling frames in a tandem cold rolling mill comprising respective pairs of working rolls (10) and back-up rolls (12) in 4-roll frames and in addition a pair of intermediate rolls (11) in 6-roll frames, at least the working rolls (10) and the intermediate rolls (11) interacting with devices for axial displacement.

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NEXT-GENERATION ROLLING MILL STAND

Small-diameter work rolls deflect primarily as a result of the contact with the backup rolls in the roll portion outside the width of the strip. This causes work-roll ­deflection that makes it difficult to roll strip with the necessary flatness. In a conventional 1,828-mm-wide (72 inch) 4-high mill, the ratio of the work-roll diameter to the maximum strip width has remained at around 0.33. In ...

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商豪實業有限公司 = 鍛造背輥 工輥 / 合金鋼胚,

Tandem mill rolls can be produced up to a maximum weight of 60 tonnes. The maximum finished weight limit for plate mill rolls is 170 tonnes. Tandem mill back-up roll can be supplied with barrel hardness levels within the range 55 to 75 Shore C. Surface hardness is constant throughout the working life of the roll. Plate mill back-up roll can be supplied with barrel hardness levels within the ...

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