Multistep networks for roll force prediction in hot strip rolling mill
Download : Download full-size image. Fig. 3. Plot of 200 examples of roll force from the training data. In the following subsections, three multi-step roll force prediction networks (MSN) are proposed: MSN (MSN-S) predicts roll force for each rolling pass based on the process parameters corresponding to that specific pass. MSN with …
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Yield on Cost Calculator | InvestingAnswers
To calculate yield on cost, enter: your per-share purchase price; the annual dividend. dividend of the trailing twelve months or an estimate of the next twelve months' dividend. Example of Yield on Cost Calculation. For example, you buy shares of Company XYZ for $10 and XYZ pays a $0.10 dividend per share for each of the last 12 months.
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Analysis of rate dependency on roll force calculation …
Calculation of work roll surface elastic deformation Roll deformation and its contour are responsible for plate shape. And the above calculated vertical pressure on node i has to be interpolated onto the work roll sur-face to calculate the resulted elastic deformation of work roll surface at node j and roll center O, as shown in Figure 4.
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The Calculation of Roll Force and Torque in Hot Rolling Mills
Abstract: Industrial mill logs from seven different hot strip mills (HSMs) were analyzed in order to calculate the mean flow stresses (MFSs) developed in each stand. The schedules were typical of the processing of microalloyed Nb, multiply-alloyed Cr-Mo, and plain C-Mn steels. The calculations, based on the Sims analysis, take into account work roll …
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cost model hot rolled coil rolling mill conversion costs
The table above shows the format of the cost model that estimates hot rolled coil conversion costs from carbon steel slab, on a traditional continuous hot strip mill [not a reversing mill]. The rolling mill product is assumed to be steel coil of standard width (typically ~1.8m wide) and of ~1-3mm gauge. This model is available for purchase from ...
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An improved method for calculating roll deformation of six …
The roll deformation model of the six-high rolling mill is one of the core models of the strip shape control theory. The influence function method (IFM) is a numerical method applied to solve the roll deformation problem. This study aims to address the problems of slow calculation speed and insufficient calculation accuracy of IFM in …
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Productivity Optimization of Cold Rolling Mills
tions, weight of hot-rolled coils before welding, and thickness and width of rolled strip. For mills of the main types, the limiting rolling speeds were determined, exceeding which leads to a decrease in the mill productivity. Keywords: rolling mill, rolling speed, coil weight, mill productivity, strip thickness and width DOI: 10.3103 ...
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The Calculation of Roll Force and Torque in Hot Rolling Mills
Abstract. Equations are derived for the normal roll pressure, specific roll load and torque in hot rolling mills, using the condition for plastic deformation in rolling derived by Orowan, together with von Kármán's equation of equilibrium. Although applying strictly to the rolling of ideal plastic-rigid materials, these equations may be ...
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What Is Roll Yield and When Is It Positive or …
Roll yield is the amount of return generated in a backwardated futures market achieved by rolling a short-term contract into a longer-term contract and profiting from the convergence toward a ...
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Rolled Throughput Yield (RTY)
The rolled throughput rate is a factor of the first pass yield rates of each step being multiplied together. With this case, 10 steps all with 95% first pass yields rates will be about 60%, which is not as high as you …
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Reduction of energy and fuel consumption in the …
The results reveal that oxygen enrichment may reduce fuel consumption by 19%–27% and overall energy consumption by 15%–20% in the hot rolling mill. Schmitz et al. (2021) demonstrated experimentally that using heating aided by electricity or hydrogen …
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Rolling
rolled to a thickness of 60 mm in a single pass. A two-high non-reversing rolling mill (shown below) with 750 mm diameter rolls made of tool steel is available for this task. The rolling mill has a power capacity of 5 MW per roll. The rolls rotate at a constant angular speed of 100 rev/min. The steel work material has the following flow curve at
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Improvement in Production Yield of Hot-rolled Coil …
Abstract. The yield is dependent upon many factors, such as cobbles, total scrap generation, crop loss and scale loss. It appears that the huge quantity of scale is mainly responsible for the...
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(PDF) Calculation of Rolling Force in the Hot Strip Finishing Mill …
The calculation of roll force and torque in hot rolling mills. Proceedings - Institution of Mechanical Engineers. 1954;168(1):191-214. 4 Maccagno TM, Jonas JJ, Hodgson PD. Spreadsheet for modelling of grain size evolution during rod rolling.
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Principles of Hot Rolling
FINISHING MILL Back-Up Roll (Undriven) Work Roll (Driven) Looper (Interstand Tension Control) Entry Side Guide (Strip Centering in Roll Bite) 0.125" 0.094" (24.8%) 0.080" (14.9%) 650 fpm 890 fpm 1380 fpm Making, Shaping and Treating of Steel: 101 Mill Configuration FINISHING MILL Work Rolls Back-Up Roll FM Stand 39 40
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Mathematical modelling of mill set-up in hot strip rolling of …
A, n and α are constants. For the finishing stands of the hot strip mill, this law can be simplified to the so called high stress law, if ασmax >1.2, which states: (3) ɛ σ = 1 α n ( ln ɛ ′ + Q / R T + A ′) Typically, n is of the order of 5 and α ∼0.01, i.e. the strain rate dependence of flow stress (1/ αn) is of the order of 20 N ...
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(PDF) MODELLING AND FEA OF HOUSINGLESS STAND HOT ROLLING MILL …
CALCULATION OF ROLL LOAD The Rolling Load in a Rolling Mill can be calculated by the methods used by Tselikov [14].Since the forces on the roll neck and in the Housing posts are identical, and the strength of the neck ( with a constant relation between its diameter and length ) is approximately proportional to d2 Where d = diameter of Roll …
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Improvement in Production Yield of Hot-rolled Coil by …
All the analysis proved to be helpful for the future prevention of the similar kind of failure. The internal target of bringing down the number of cobbles per month in single digit was taken. This also helped in improving the maintenance practice and reducing the amount of delays significantly. The yield was improved by 0.93%.
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A Comprehensive Guide to Hot Rolling Mill Process
A Comprehensive Guide to Hot Rolling Mill Process. By steefo. No Comments. The main objective of the entire steel rolling process is to create complete or semi-complete parts by deforming the massive plates and ingots to decrease the cross …
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GENERAL ASPECTS OF ROLL COOLING FOR HOT
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 the roll gap is for the basic cooling and lubricating of the rolls. It can be adjusted from the centre outwards to match the strip width being rolled, and the flow rates used are
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Rolling Mill Cooling Bed – IspatGuru
It transfers the bars one by one to the roller table, on which they are transported to the finishing section. It is important equipment in the hot rolling of long products in a rolling mill. A cooling bed carefully moves and cools the hot steel rolled bars after the hot rolling process. Typical view of a cooling bed in a rolling mill is at Fig 1
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2020 Technology and Operation of a Hot Rolling Mill …
The first major operation in the hot rolling mill is the reheating of s lab or billet. There is a lot to be. said about reheating furnaces, both …
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Principles of Hot Rolling
FINISHING MILL Back-Up Roll (Undriven) Work Roll (Driven) Looper (Interstand Tension Control) Entry Side Guide (Strip Centering in Roll Bite) 0.125" 0.094" (24.8%) 0.080" (14.9%) 650 fpm 890 fpm 1380 fpm Making, Shaping and Treating of Steel: 101 Mill …
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Numerical and analytical estimation of rolling force …
Rolling is the most widely used mechanical work technique. About three quarters of steel output is treated in rolling mills, and only a quarter is consumed for forging, extruding, and founding [].Recent review papers on rolling process [2, 3] continues to …
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Analysis on energy consumption and performance of
In steel industry hot rolling is an energy-intensive process as steel slabs need to be heated to about 1,250 (^circ )C before being rolled on the hot strip mill.
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Hot Strip Rolling | SpringerLink
Strip steel with a continuous coil thickness of about 20 mm or less (the maximum thickness is generally 25.4 mm) and with a width less than 600 mm is narrow strip steel, while strip steel exceeding 600 mm is broadband steel. The first hot strip mill was put into production in the United States in 1905 to produce strip with a width of 200 mm.
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The Calculation of Roll Force and Torque in Hot Rolling Mills
The Calculation of Roll Force and Torque in Cold Strip Rolling with Tensions. D. Bland H. Ford. Engineering, Materials Science. 1948. From an approximate theory, equations are derived for roll force and torque with and without front and …
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Numerical and analytical estimation of rolling force and torque in hot
Rolling is the most widely used mechanical work technique. About three quarters of steel output is treated in rolling mills, and only a quarter is consumed for forging, extruding, and founding [].Recent review papers on rolling process [2, 3] continues to point out that there are new demands on modeling the rolling process that could bring prompt …
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A Definitive Guide to Rolling Mills: All You Need to Know
Definition of a Rolling Mill. Generally, a rolling mill refers to a machine used in metalworking works or projects to shape metal materials by passing them through a pair of rolls.. Similarly, these machines' main objective is to reduce metal materials' thickness and redesign them for use in different industrial projects.. Some of the by-products …
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An investigation on the roll force and torque fluctuations during hot
The roll force and roll torque are the main parameters in controlling the flatness and geometrical accuracy, yield strength and the hardness of the product, the mill stretch and vibrations of the rolling mill, and roll flattening (Lenard, Citation 2002). Therefore, it is worth to make a more detailed investigation on the variation of these ...
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