how to reverse the rougher in a hot strip mill

8 Ways You re Killing Your End Mill
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Feb 07 2018 0183 32 Few things can ruin a machinist s day more easily than a broken chipped or prematurely worn down end mill Besides requiring replacement a compromised cutting tool can produce subpar results and scrapped parts Stop killing your end mills and extend your tool life by avoiding these 8 common mistak...
Study on Short Stroke Control in Roughing Stage of
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Width necking at the rougher in a hot-strip mill Journal of Mechanical Working Technology 1983 DOI 101016/0378-3804 83 90066-9 3 Wenbin Liu Yonglin Kang Parameter optimization of short stroke control model on 2250mm hot strip mill of Qian an Steel Company Rolling 2010...
Model Predictive Controller for Strip
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Abstract Strip tracking problems at the hot strip mill sometimes occur at the finishing mill during tail-out These errors are believed to be a major cause of pinch To reduce the severity and number of pinches a tilt controller has been designed to minimize DS-OS roll force differences using a Model Predictive Controller MPC during tail-out...
REFERENCE LIST
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for Hot Strip Mill Equipment No of Equipment REMARKS Flying Sizing Press 11 Edger with Hydraulic AWC 26 Hydraulic Sideguide for Rougher 9 Coilbox 7 Flying Crop Shear 19 REFERENCE LIST for Hot Strip Mill Equipment No of Equipment Copper Copper Alloy Hot Mill 4 Copper Copper Alloy Cold Mill 36 Including 4 skinpass...
New Rolling Method Of Reversing Cold Rolling Mill
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in the mill and tension between the mill and each reel is established After that rolling of the first pass is started The tension becomes lost when the hot coil is taken out from the payoff reel so reduction of off-gauge is implemented by applying tension due to friction force using a strip press in the mill...
Reversing cold mills steel SMS group
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The reversing cold rolling mill is the all-rounder among the cold rolling mills Here thin strips thick strips soft grades high-strength and ultra-high-strength strips...
white paperSuccessful Execution of Roll Cooling Strategies
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related to the actual electrical energy driving the mill stand Some mechanical energy is consumed in increasing the hardness of the strip but most ie 85 of the total electrical energy driving the mill will become heat that must be removed In the hot mill scenario additional heat...
US4074555A
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A sheet-metal strip coming hot from a rolling mill is subjected to alternate bending in opposite directions before being wound on a mandrel preferably while still in a temperature range of about 600 176 C to 800 176 C in the case of steel The bending is carried out by deflecting rollers which may be mounted upstream of a pair of reverse-feed rollers acting as a strip brake preceding the driven...
Camber free rolling for roughing stands SMS group
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You face rolling problems in the finishing mill and an increased likelihood eg of tail end breaks This is where camber-free rolling comes in It s based on the interaction of roll alignment control integrated in our automation system and strong position-controlled side guides in the roughing mill stand entry and exit sections Here s how it...
New Rolling Method R f Reversing Cold Rolling Mill
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Key words Zoom-MillTM Off-gauge Minimization Yield Productivity Leader strip Spot welding INTRODUCTION For production of cold rolling steel strips in the size of yearly production capacity ranged from 150 to 300 thousands tons a reversing cold rolling mill which takes relatively inexpensive capital investment is put into use...
Everything you need to know about flatteners and levelers
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Then as the cold mill gap is adjusted to reduce the crown the coil also will come out flat--if the hot mill got the relationship between crown and flatness right to begin with If the cold mill rolls or hot mill coils have too much crown the mills will roll out the center creating center...
Study and Application of SSC Model on Hot Rolling Wide
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According to cutting loss of the head and the tail of hot rolling wide strip mill for the loss of width the control conditions the control mode and control model of short stroke control SSC of the rough mill are researched and given by dynamical changing the rough mill roll gap for SSC simulation and basing on infinite element method FEM analysis and results...
Steel Roughing Rolling Mill Stand
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The steel roughing rolling mill stands are used to reduce the thickness of the steel while at the same time extending the overall length Steel Roughing rolling mill stand is an important part of a work stand roll bearing chock and roller adjustment device is installed on the frame...
Rolling Technology for Thin Steel Strip in Hot Strip Mill
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2 Study with a continuous hot steel strip rolling 21 Calculation model for hot steel strip rolling The hot strip mill shown in was assumed as a Fig 1 calculation model for analysis This facility consists of one rougher and six finishing stands Table 1 shows the rolling conditions Case-R based on the assumption that low carbon steel...
Reversing Rougher Mill Spindle Video
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Reversing Rougher Mill Spindle Video movaresa Loading Unsubscribe from movaresa How does it work hot-strip rolling mill - Duration 2 47 thyssenkrupp 125 540 views 2 47...
Report on Best Available Techniques BAT in the German
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Report on Best Available Techniques BAT in the German Ferrous Metals Processing Industry FINAL DRAFT Deutsch-Französisches Institut für Umweltforschung DFIU...
REVERSING COLD MILL
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Also strip flatness measuring equipment mounted at one or both ends of the mill combined with multi-zone work-roll cooling to meet the highest demands for flatness Two-stand reversing cold mills Primetals Technologies two stand reversing cold mills combine the flexibility of single-stand reversing mills with the capacity of conventional coil...
Width necking at the rougher in a hot
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The amount of necking is determined mainly by the conditions of rougher rolling in the hot-strip mill In this paper the mechanism of necking the influence of rolling conditions on the amount of necking and the optimum edger-rolling pass schedule are described The main conclusions obtained are as follows i Necking originates from the...
Upgrading of Hot Finishing Mill to 4
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hot-rolled coils thereby effecting pass cutting in the cold-rolling process 3 To realize a high-productivity hot-rolling mill by replac-ing the computer control system with one of the latest design that achieved a significant degree of automa-tion The expansion of the hot finisher to 4 stands which was...
A BASIC UNDERSTANDING OF THE MECHANICS OF
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Secondary scale on hot strip and the impact 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...
Feedback Control for Hook Camber Wedge and Strip
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Hot strip mill no 1 of thyssenkrupp Steel Europe consists of 2 roughers the first is called R1 the second one called Z3 While the first rougher is considered to perform several reversing...
Tata Steel upgrades Port Talbot hot strip mill
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The mill services a number of markets including automotive engineering construction and domestic applianc The main focus of the upgrade was a £25 million reversing rougher which transforms a 9-inch 23cm thick slab of steel into sheet of less than an inch 25cm thick The equipment is believed to be the most powerful in Europe...
The Hot Rolling Process
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The Hot Rolling Process The primary function of the Hot Strip Mill is to reheat semi-finished steel slabs of steel nearly to their melting point then roll them thinner and longer through 12 successive rolling mill stands driven by motors totaling 77 000 hp and finally coiling up the lengthened steel sheet for transport to the next process...
Dynamics and Variance Control of Hot Mill Loopers
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Layout of a semi-continuous hot strip mill with 1 reversing rougher mm or even less and its length may well exceed a kilometer While the strip properties such as centerline gauge width proflle and temperature must be precisely controlled to meet product requirements these properties are only...
How To Reverse
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Reverse-searing is simply the process of finishing a piece of meat with a high-heat sear after initially bringing the internal temperature up very slowly The low-and-slow portion can take place in an oven or smoker while the searing is typically done with a grill or cast iron pan Once your grill is ripping hot put your steak back on for...
Hot strip mill
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Hot strip mill Around a third of the products we send out to our customers are hot rolled In the hot strip mill Ghent slabs coming from the continuous caster are rolled out to steel plates with a thickness of around 125 to 13mm How does this work First the slabs coming from the continuous caster are pre-sorted in the slab yard...
Active disturbance rejection control for strip steering
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Abstract Strip off-centering is a displacement of strip center from a roll center The mathematical model is constructed based on strip dynamics roll deformation and tension It includes time-varying input delay and actuator dynamics To reduce an off-center value of the strip active disturbance rejection control algorithm is proposed The simulation using a realtime simulator shows that the...
MODELLING OF WIDTH CONTROL FOR HOT STRIP MILL
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continuous slab caster feeding a hot strip mill is limited This has increased the requirement for width reduction in the hot strip mill rolling stands The width of a slab can be reduced using vertical edger rolling stands in the roughing mill section and by using a slab sizing press...

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