energy consumption and work-roll wear The roll cooling system on mill entry and exit side remains switched-on, which is of vital importance especially for high-performance hot strip mills Minimum Quantity Lubrication MQL® represents a new generation of roll-gap lubrication technologies for cold rolling, which applies minimum.
The invention relates to a method for roll lubrication, in particular for roll gap lubrication in a roll stand for rolled strip, in which at least one first supply line (1) water and at least one second supply line (2) oil at least one mixing element (3) is supplied, wherein in the Mixing element (3) the water and the oil are mixed and wherein the mixture of water and oil is supplied to a.
to nucleation of cracks and forced hot strip mill to tem-porary shutdown, replace work roll or even to work roll elimination In addition, surface layers of work rolls expose to normal and tensile stress, produced during contacts with slabs and backup rolls Values of the normal stress in work roll.
rolling mill, dedicated roll cooling systems are required to fulfill the required functions Examples are suitable roll cooling and lubricationsystems to fully utilize the advantages of HSS rolls in hot strip mills, and selective roll cooling systems as a method to control the flatness of the strip in cold rolling mills.
P Kucsera et al Hot Rolling Mill HGC Thickness Control Improvement
You are guaranteed to benefit from SMS groups long-standing technological expertise in hot rolling processes for the aluminum industry Out of this comes highly developed technology, automation and service packages that feature custom.
Dec 03, Attributes imparted to the strip by the hot rolled strip mill include surface quality, thickness, width, and flatness control as well as strip profile Rolling of steel slabs in hot strip mill consists of several sub-processes and at the end of them the final product ‘hot rolled coil’ is produced.
implemented during the last decade towards a cost and energy efficient leading edges hot strip mill 2 Increased work roll performance The degradation of the work rolls in the early stands of the finishing mill is a major concern for the mill operators It reduces the length of the rolling.
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 thickness6 For a 4-high hot rolling mill, roll lubrication occurs in two zones, ie, the contact zone between the work roll and backup roll and the deforming.
For hot strip mill Edger applications, Xtek developed another special steel grade with superior resistance to the thermal fatigue and firecracking so prevalent with other rolls in this environment Plate Leveling Rolls round out the Xtek’s roll product offerings with a special heat treatment providing more consistent depth of hardness.
Lubrication in an integrated steel plant is a major challenge with numerous types of lubricants and various types of equipment The steel plant equipment work under various operating parameters; like from extreme heavy load to very high speed, low temperatures to high temperatures, dusty polluted environment to humid acid environment.
• Type of mill and material to be rolled • Number of mill stands • Number of rolls per stand • Maximum rolling force for each stand • Maximum and minimum strip speed or RPM at each stand • Maximum and minimum roll diameters and roll lengths • Whether the mill stops under load For assistance in selecting the proper bearing, fill out.
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 complex, hard carbides evenly distributed in the microstructure The surface failure mechanisms of work rolls are very complex involving plastic defor.
Slabs are the feed material for hot strip mills or plate mills and blooms are rolled to billets in a billet mill or large sections in a structural mill The output from a strip mill is coiled and, subsequently, used as the feed for a cold rolling mill or used directly by fabricators.
Continuous Circulating Oil Lubrication 10 In order to address the inadequacies of grease lubrication, Renold has developed an oil lubricated spindle design for use in all types of mills including Hot Strip Roughing and Finishing applications All types of spindles create heat through sliding contact under heavy compressive stress at the.
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.
roll bite and in a typical Cold Tandem Mill, work roll temperatures normally fall in the range of 55oC
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.
Roll neck bearings for rolling mill Products for Steel Production Equipment Features of JTEKT products , These bearings are mainly used for the roll neck thrust bearings of hot strip mills and cold strip mills Bore diameter 305 400 Outside diameter 500 650 , Cold strip mill work roll (open type) Cold strip mill work roll (sealed.
ArcelorMittal Indiana Harbor for “Minimization of Hot Mill Losses Originating From Downcoiler” A successful project working with a large set of historical data, on a 80-inch hot strip mill, the ArcelorMittal team determined which loss-of-production incidents could be attributed to the downcoiler equipment, and established their root caus.
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.
at the six stands (F1 to F6) ArcelorMittal Tubarão’s hot strip mill Three parameters for the process of hot strips rolling were chosen, in a 23 factorial project: slab thickness, water flow of interstand cooling or ISC (top and bottom) between stands F1/F2 and F2/F3, and applied oil flow in roll gap lubrication system (work rolls F2 to F4).
Steel Mill Reduces Downtime, Improves Productivity Through Wireless Monitoring of Secondary Systems SMART WIRELESS “I got the flow numbers I needed within 24 hours of installing the devic Wireless is fantastic” Gary Borham Operations Manager 80” Hot Strip Finishing Mill RESULTS • 5% productivity improvement, downtime reduced.