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LUBRICATION ON WORK ROLL BEARINGS FOR THE HOT
LUBRICATION ON WORK ROLL BEARINGS FOR THE HOT STRIP MILL QUAKERTEK™ CS 4015-EP THE SOLUTION CHALLENGES A large Steel Mill was currently using a grease on their hot strip mill bearings that was washing out. As a result the outside of the mill’s roll chocks were polluted with grease, and the inside contained only a small amount.
Lubrication of hot-strip-mill rolls ScienceDirect
To improve hot-steel-strip rolling mill operations trial attempts at work roll surface lubrication have been made by various investigators throughout the world during the last decade. Some European tests are briefly described. Most of the investigations have been somewhat inconclusive, possibly because they were not undertaken with sufficient
Lubrication of hot-strip-mill rolls ScienceDirect
Feb 01, 1973· While there are a number LUBRICATION OF HOT-STRIP-MILL ROLLS 207 of possible causes for the occurrence of ridge-type defects in the cold-reduction of light gauge strip, some of these are directly attributable to the roll cooling water and condition of the work rolls in the hot rolling mill3'4.
The Effects of High-Speed Steel Roll and Lubrication on
Feb 05, 2020· Work rolls in the hot strip mill withstand extreme service conditions, especially when electrical steels are rolled, resulting in severe roll wear and fatigue. High-speed steel (HSS) work rolls and rolling lubrication are applied to the mill to improve roll wear and fatigue. Tests show that HSS work rolls manifest good performance in wear, fatigue and oxidation resistance during electrical
Roll Gap Lubrication System For Hot Strip Mills
4 Roll wear is inherent during hot rolling •Abrasion with the oxide layer of the strip and the particles detached from the roll •Adhesion of scale or strip to roll and consequent detachment or simply adhesion of roll particles to strip. •Surface fatigue, by thermal and mechanical crack formation due to cycles of heating and cooling .
Lubrication system for hot-strip mill rolls SpringerLink
Magnitogorsk Mining-Metallurgical Institute. Magnitogorsk Metallurgical Combine. Translated from Metallurg, No. 4, pp. 41–42, April, 1980
Application of Hot Rolling Lubrication on a Reversing Coil
Hot strip mills began to apply the roll lubrication technology. Past studies reveal that roll lubrication can reduce the mill separating force/torque5 and the tertiary scale thickness.6 For a 4-high hot rolling mill, roll lubrication occurs in two zones, i.e., the contact zone between the work roll and backup roll and the deforming
Some aspects on lubrication and roll wear in rolling mills
strip grades were used. The obtained model is tested successfully in two other hot strip mills. Contradictory to the currently used on-line model, the new model takes the work roll flattening and back-up rolls contact area into consideration. Also the influence of strip- and work roll grades is included.
Performance of Grease in Work Roll Bearing of Roughing
Performance of the Grease in Roughing Stand at Hot Strip Mill The grease was tried out for lubrication of Work Roll Bearings of 4 stands of Roughing Mill (R#2 to R#5) at Hot Strip Mill. Period of Trial: 83 days. Observations: Grease was tested for its pumpability with
Some aspects on lubrication and roll wear in rolling mills
strip grades were used. The obtained model is tested successfully in two other hot strip mills. Contradictory to the currently used on-line model, the new model takes the work roll flattening and back-up rolls contact area into consideration. Also the influence of strip- and work roll
Hot Rolling Oil for Steel Plants A Case Study
better lubrication, roll protection and low power consumption, the use of hot rolling oil is ever increasing in hot strip, structural and rail mills at least partially at few stands of the mill. The requirement and
Application of hot rolling lubrication on a reversing coil
To improve hot-steel-strip rolling mill operations trial attempts at work roll surface lubrication have been made by various investigators throughout the world during the last decade.Some European
Aluminium Rolling Lubrication: part 1 Innoval Technology
Aluminium rolling lubrication: Hot Rolling. View of a typical hot rolling mill showing lubricant application. During the hot rolling process, lubrication and thermal control of the work rolls are achieved by spraying oil-in-water emulsions onto the rolls in controlled patterns. The emulsion also removes any loose debris from the roll
HOT STEEL ROLLING Quaker Chemical Corporation
A hot mill customer was experiencing problems with its current operations and was looking for improvement in the following areas: » »Electrical power » Productivity » Work roll wear » Strip quality To help improve their operations, Quaker proposed introducing a roll-bite lubrication
THE USE OF A PILOT MILL FOR DEVELOPMENT OF
mill. Some specifications: main motor/tension reel power: 400/200 kW, max. roll force: 1200 kN, backup/work roll diameter: 400/165 mm, max. tension: 30 kN, max. rolling speed: 1200 m/min. Note that some of these values will be much lower for aluminum hot rolling. The strip width may vary between 100 and 200 mm. The mill
METALLURGICAL APPLICATION TO WORK AND BACK UP
Nov 23, 1988· Requirements of Rolling Mills should be considered: Rolls cost: It represents the 5% of the direct cost of a strip sheet rolling mill and 10% including the operation of the roll workshop. Cost of no-quality: The inlaid calamine because of the roll represents 150 000 € up to 450 000 € /year depending on the type of Hot Strip Rolling Mill.
Online prediction of work roll thermal expansion in a hot
Nov 14, 2015· Profile and shape control is utilized to maintain the dimensional quality of a rolled strip. Prediction of work roll thermal expansion is an important element in controlling the strip profile and flatness in a modern, high-speed rolling mill
(PDF) On the Optimization Procedure of Rolling Mill Design
The optimal work roll crown in the finishing train of a hot strip mill should be determined so that, for all changes in strip gage, width and strength, the crown control devices can continue to
Highest performing Hot Strip Mills Primetals Technologies
The demand for hot rolled strip is growing in multiple ways. To remain competitive, new and existing mills must meet this challenge in the best possible way. The production of hot strip is a key element of steel production. Since close to half of all steel produced is hot-rolled to strip, mills
Application of hot rolling lubrication on a reversing coil
To improve hot-steel-strip rolling mill operations trial attempts at work roll surface lubrication have been made by various investigators throughout the world during the last decade.Some European
Aluminium Rolling Lubrication: part 1 Innoval Technology
Aluminium rolling lubrication: Hot Rolling. View of a typical hot rolling mill showing lubricant application. During the hot rolling process, lubrication and thermal control of the work rolls are achieved by spraying oil-in-water emulsions onto the rolls in controlled patterns. The emulsion also removes any loose debris from the roll bite area
Development and Application of Hot Rolling Lubrication
To integrate a new roll gap lubrication system into an existing hot strip mill is a challenge problem. A lubrication expert system was developed and embedded into finish rolling setup system. The reference value setup by expert system is downloaded to roll bite lubrication PLC via finish mill PLC to open oil spraying valve and regulate the oil concentration.
Hot Rolling Oil for Steel Plants A Case Study
better lubrication, roll protection and low power consumption, the use of hot rolling oil is ever increasing in hot strip, structural and rail mills at least partially at few stands of the mill. The requirement and application of different plants were quite different. Hence, one oil may not be suitable for
Rolling mill bearing lubrication and sealing
Currently rolling mill bearings are mainly used grease and oil lubrication. Most manufacturers are now simple and easy to use grease lubrication lubrication, if possible, take the oil lubrication technology, you can make rolling bearings is the ideal lubrication conditions of work, which will greatly reduce the bearing consumption.
Improving Thin Strip Profile Using Work Roll Cross and
Figure 14(b) shows the effect of work roll shifting (0 and 8 mm) on strip profile after the 3rd pass without work roll cross angle, 20 rpm speed, and 80 mm strip width at 1.3 speed ratio under lubrication conditions. Similar to the 1st and 2nd passes, work roll shifting is not significant in reducing the strip profile as well as thickness
ROLLING OIL A WIN Group Company
of the strip and roll surface •Removing the contaminant from the strip surface and mill ※ 2012 World-class Product Award for Cold Rolling Oil 1) Lubrication Decreasing the coefficient of friction by the oil film on the roll & strip surface. 2) Cooling Removing the heat that is occurred by the friction of the strip and roll surface. 3
Online prediction of work roll thermal expansion in a hot
Nov 14, 2015· Profile and shape control is utilized to maintain the dimensional quality of a rolled strip. Prediction of work roll thermal expansion is an important element in controlling the strip profile and flatness in a modern, high-speed rolling mill. In this study, a full three-dimensional analytical model “based on the finite difference method under transient condition” that already was developed
(PDF) On the Optimization Procedure of Rolling Mill Design
The optimal work roll crown in the finishing train of a hot strip mill should be determined so that, for all changes in strip gage, width and strength, the crown control devices can continue to
Highest performing Hot Strip Mills Primetals Technologies
The demand for hot rolled strip is growing in multiple ways. To remain competitive, new and existing mills must meet this challenge in the best possible way. The production of hot strip is a key element of steel production. Since close to half of all steel produced is hot-rolled to strip, mills require maximum throughput and availability
Hot Roll Lubrication A Cost-Cutting Measure
Aug 20, 2002· Hot roll lubrication has been known about for a long time and the latest research has demonstrated the advantage and value of this method to mill owners and their customers. The key lies in the commitment and professional approach by all concerned parties to make this method work. Increasing the Competitiveness of Hot Rolling
Qualitative study and a novel solution to nozzle clogging
Nozzle clogging in roll gap lubrication (RGL) is a pain area for hot strip steel rolling. Nozzle clogging severely affects lubrication affecting rolled surface quality causing prominent hot rolling d...
Effects of Lubrication in Ferrite Rolling of Interstitial
Ferrite rolling of interstitial free steel strip in the temperature range 650-850°C can effectively reduce furnace costs and scale formation as a result of lower strip reheating temperatures. Different lubrication conditions of lubricating oil, solid lubricant and dry condition were used during ferrite rolling tests of thin interstitial free steel strip on a 2-high Hille 100 experimental
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 70oC with strip recoil temperatures and inter-stand strip temperature rarely exceeding 160 oC depending on product. Roll Bite temperatures in slower heavily drafted stands can peak in the region of 300oC, diminishing with the
Rolling mill bearing lubrication and sealing
Currently rolling mill bearings are mainly used grease and oil lubrication. Most manufacturers are now simple and easy to use grease lubrication lubrication, if possible, take the oil lubrication technology, you can make rolling bearings is the ideal lubrication conditions of work, which will greatly reduce the bearing consumption.
Development and Application of Hot Rolling Lubrication
To integrate a new roll gap lubrication system into an existing hot strip mill is a challenge problem. A lubrication expert system was developed and embedded into finish rolling setup system. The reference value setup by expert system is downloaded to roll bite lubrication PLC via finish mill PLC to open oil spraying valve and regulate the oil concentration.
Effect of Oil Film Thickness on Lubrication Property in
In hot rolling, lubrication between the work roll and hot strip plays an important role in reducing rolling force and protecting the work roll surface. However, the tribological behavior in hot rolling has not been clarified sufficiently. In this work, the effects of oil amount on the coefficient of friction in hot rolling were
ROLLING OIL A WIN Group Company
of the strip and roll surface •Removing the contaminant from the strip surface and mill ※ 2012 World-class Product Award for Cold Rolling Oil 1) Lubrication Decreasing the coefficient of friction by the oil film on the roll & strip surface. 2) Cooling Removing the heat that is occurred by the friction of the strip and roll surface. 3
Hot rolling friction control through lubrication
This thesis is about the improvement of the hot rolling process. This steelmaking process turns a slab (10m long, 1.5m wide, 250mm thick) into a coiled strip (1000m long, 1m wide, 2mm thick). To obtain some metallurgical properties and to make the rolling easier, the slab is heated up to 1300 ° C and roughly rolled before going to the finishing mill. In the finishing mill the strip is rolled
Effects of Lubrication in Ferrite Rolling of Interstitial
Ferrite rolling of interstitial free steel strip in the temperature range 650-850°C can effectively reduce furnace costs and scale formation as a result of lower strip reheating temperatures. Different lubrication conditions of lubricating oil, solid lubricant and dry condition were used during ferrite rolling tests of thin interstitial free steel strip on a 2-high Hille 100 experimental
SKIN-PASS MILLS for a perfect finish SMS group
SKIN-PASS MILLS FOR HOT STRIP Skin-passed hot strip has many advantages: Skin- Work roll bending + + + Low-quantity lubrication (LQL) is a lubrication concept for skin-pass mills which is also suitable for utilization in the final millstand of a tandem mill. In this system,
Thermal Compensation of Work Roll Grinding in Hot Strip
36 Thermal Compensation of Work Roll Grinding in Hot Strip Mills work rolls were first measured before the grinding operation. After the uniform temperature distributions along the work roll axis were achieved, the measure-ments were carried out again to obtain the work roll profiles. 5. RESULTS The results of the experiments were used to iden-
Bearings in Work Roll Arrangement of the 7-Stand Hot-Strip
of the 7-Stand Hot-Strip Mill with Bending WL 17 526 EA. Operating data Bending force max. 1962 kN Work roll diameter 777 mm Roll body length 2 286 mm Rolling speed 1,6–12 m/s (Stands F1 to F4) Sealed carbonitrided* tapered roller bearings for work rolls of the stands F1 to F4 Lubrication, Sealing The bearings can be greased with a
Online prediction of work roll thermal expansion in a hot
Nov 14, 2015· Profile and shape control is utilized to maintain the dimensional quality of a rolled strip. Prediction of work roll thermal expansion is an important element in controlling the strip profile and flatness in a modern, high-speed rolling mill. In this study, a full three-dimensional analytical model “based on the finite difference method under transient condition” that already was developed
Development and Application of Hot Rolling Lubrication
To integrate a new roll gap lubrication system into an existing hot strip mill is a challenge problem. A lubrication expert system was developed and embedded into finish rolling setup system. The reference value setup by expert system is downloaded to roll bite lubrication PLC via finish mill PLC to open oil spraying valve and regulate the oil
Roll neck bearings for rolling mill JTEKT
These bearings are mainly used for the work rolls and intermediate rolls of hot strip mills and cold strip mills. Bore diameter 343.052 400 482.6 509.948 609.6 711.2 Outside diameter 457.098 530 615.95 654.924 787.4 914.4 Cones overall width 254 370 330.2 379 361.95 317.5 Cups overall width 254 370 330.2 379 361.95 317.5 680 1 200 1 330 1 460 1
Work Roll Bearing Arrangement of the 7-stand Finishing
Roll body diameter 736 mm Roll body length 2 133 mm Rolling speed 2,6 20 m/s (stands 2 to 7) Lubrication The grease is held close to the rolling elements. It is effective over a long period of time. Since no grease can escape from the bearings, and only little amounts of it are needed, a high-quality rolling bearing grease can be used.
Tribology in Metal Working DiVA portal
The investigations of hot rolling work rolls focus on microstructure and hardness as well as cracking- and surface characteristics in both laboratory scale and in the hot strip mill. Results show that an ideal hot work roll mate-rial should be made up of a matrix with high hardness and a large amount of