Pudong new district, Shanghai, China.
type of pyrometer to measure the strip temperature stably during cooling on the hot run ta-ble of a hot strip mill and a control process for precise cooling of the strips using the pyrom-eter. The new strip cooling process was developed and put into commercial practice at Kashima Works and is being expanded to other mills of the company.
Y. J. Wu 415 Figure 2. Diagram of coiler control process. Table 1. The tension value of Ut of hot roll strip mill.
Aimed at the complex demand of hot strip rolling mill in practicing, the configuration of the coiler and the technological process is analyzed. The arithmetic of coiling tension and the control process is introduced. The frame of the tension adjusting system is given. The coiler control system hardware is designed. The system is designed scientifically with steady control and meets demand of ...
Shape setup model (SSM) plays a critical role to achieve satisfactory precision of strip shape in hot strip mill process (HSMP). However, for the design of shape model, the lack of systematic shape theory restricts the high accuracy of strip shape. In this paper, the procedure of SSM will be generally introduced and practically demonstrated with a real HSMP producing system. The …
The hot testing system consists of a water-cooled testing head, testing electronics and various software tools that together form a comprehensive, fully automated system. It can be fully integrated in the mill control network. 4.1 Water-Cooled Test Head The sensor is a robust, water-cooled test head through which the hot material passes
Home Browse by Title Books Mechatronic systems techniques and applications (vol. 1): industrial manufacturing The hot strip rolling mill looper: a control design study. chapter . Free Access. The hot strip rolling mill looper: a control design study. Share on. Authors: Michael A. Johnson. View Profile, Gerald Hearns.
For hot strip mills,mill type option,roll contour design,technological setup and modeling of the control system are key factors for high performance of the profile and flatness control system and good strip quality Two new types of rolls,VCR(varying contact back up rolls)and ASR(asymmetry self compensating work rolls),have been developed and used on the 1700 mm hot strip mill at WISGCO by our ...
The hot strip mill process (HSMP) is a high-speed, transient metal machining molding process.1–3 In the steelmaking process, stable product quality and safe, reliable operation of a hot strip rolling mill are the main control objectives. The dimensional quality speci-fication,4 consisting of thickness, width, flatness, and
Developed out of vast metallurgical know-how and experience in rolling projects, our process control and automation covers the entire process route for Hot Strip Mills. High-performance physical models, combined with neural networks and intelligent technological controls ensure the products' excellent quality regarding dimensional tolerances ...
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Hot strip mills. You'll appreciate X-Roll ® hot strip mills from SMS group as all-round plants for high-quality hot strip. They are designed to produce flat steel from thin strip with a minimum final gauge of 1.2 millimeters to high-strength pipe steels up to 25.4 millimeters thick, including stainless steel grades.
better process control Today, cold and hot strip mills around the globe are continuously looking for ways to increase their productivity, save energy, lower their overall costs and improve the final quality of their products. Using lubricant in cold rolling and controlling the roll-wear in hot rolling are some of the ways to achieve these goals.
In the research area Hot Strip Rolling, advanced nonlinear process control problems associated with the operation of a roughing mill and a tandem hot-strip finishing mill are solved. Rolling mill like the one shown in Fig. 2, constitute nonlinear MIMO dynamical systems. Their behavior is characterized by input, state, and time constraints, time ...
The complex control systems have been applied to hot rolling processes and, now, the control area covers the whole line. The process technology of hot strip mill has matured; however, the development of advanced control in this area is still active, for the reason that the demand to improve quality has become increasingly severe.
spray valves are sequentially manipulated in the order of from the input side to the output side of a hot strip mill and the succeeding one has a larger cooling power than that of the preceding one. a computing device for computing the on-off time of the spray valves computes the cooling power required for a certain length of a sheet bar ranging from the leading end to a certain point of the ...
Improved process control of the hot strip mill may lead to indirect energy savings through reduced product rejects, improved productivity, and reduced down time. The primary aim is to control the oxygen level, and hence optimize the combustion in the furnace, especially as the load of the furnace may vary over time. The savings depend on the load factor of the furnace and control strategies ...
Hazards and Control Measures in Hot Rolling Mill Operation | Safety Engineering 2 | 104 | PDIS | Safety related videos link as per below.VARIOUS TYPES EQUIPM...
to roll thin hot strip in a finishing mill of a CSP line and in a conventional hot-strip mill. The goal is to achieve improved strip thickness performance and operational stability. Primetals Technologies has developed a new control concept for rolling ultra-thin hot-rolled strip in the finishing mill of an ESP line.
A method for controlling the temperature of a workpiece in a hot strip mill includes calculating temperature changes of the strip at each mill stand location by determining changes in workpiece deformation resistance and correlating the changes in deformation resistance to changes in temperature.
For a modern hot strip mill, process control is fully computerized, so the properties of the final product may be precisely controlled. The objectives of subsequent cold rolling include the production of sheets possessing high quality surfaces and accurate and consistent dimensions in addition to high speeds, required by the increasing demands ...
Measurement Systems for Hot Strip Mill & Plate Mill. Width measurement. Cropping control. The ability to precisely measure the strip and plate dimensions during the hot rolling process is essential for the production of high quality steel and for achieving an optimum yield. DELTA has developed a range of gauges for installation in the extreme ...
process automation systems for hot strip mills. Therefore, detailed transient 3D-models of the underlying severely asymmetric flat hot rolling processes have been developed by the authors with the help of the commercial FEM-package ©Abaqus Explicit. By utilizing suitably
CSI's Hot Strip Mill includes six finishing mills, which reduce the thickness of the transfer bar down to the gauge required by the customer or the next process. The rolling speed is set to allow the last stand to perform the final reduction at the finishing temperature, between 1500° to 1650°F, specified to reach certain mechanical properties.
G. Engberg, L. Karlsson, in Fundamentals of Metallurgy, 2005 11.5.1 Hot rolling. Mill data from the hot strip mill has been used to calculate the mean flow stress in each pass, assuming the material to be elastic – ideally plastic. The roll force model used was a classical slab method with constant friction assumed in the roll gap. For the roughing mill (reversible 4-high) both roll force ...
In the process of Rolling the most significant aspect is the generation of heat through friction and deformation in the 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.
The disclosure of the present invention relates to a strip temperature control method and apparatus for a finishing train of a hot strip rolling mill, including strip interstand coolant supply means, and a control for varying the rate of flow thereof, which includes a feed-forward control signal wherein the rate of flow is controlled in certain stands with reference to a computed temperature ...
Summary. Hot strip rolling mills are characterised by a process which has many interactions, is distributed with dominant transport delays and has a lack of measurements due to the severe environment. There is ever increasing market demand for better product quality of the steel strip hence the requirement for higher performance controllers.
4 Quality-relevant fault monitoring on hot strip mill process 4.1 Process description. Hot strip mill process is an extremely complex industrial production process. Improving the quality of products can bring higher economic and social benefits for the factory. A schematic layout of the hot strip mill is illustrated in Fig. 1.
In this article, a robust steering control design is proposed in order to guarantee the stability of a hot strip mill and improve its performances. The rolling process consists in crushing a metal strip between some rolls for obtaining a product with constant and desired thickness. The quality of the rolled products and the safety of the production process are linked to the lateral movement of ...
In this paper, hardware-in-the loop-simulation(HILS) simulator for steering control is developed. The simulator describes lateral movement of the strip in hot strip finishing mill. The simulator include strip dynamics, mill model, mill motor and AGC controllers. The factors considered for strip dynamics are initial off-center and wedge difference. The wedge is realized using the expansion …
@article{osti_795009, title = {AISI/DOE Advanced Process Control Program Vol. 3 of 6 Microstructure Engineering in Hot Strip Mills, Part 1 of 2: Integrated Mathematical Model}, author = {Brimacombe, J K and Samarasekera, I V and Hawbolt, E B and Meadowcroft, T R and Militzer, M and Pool, W J and Jin, D Q}, abstractNote = {This report describes the work of developing an integrated …
technology of hot rolling mill process pdf. developing an extension of ultra-thin rolling control to roll thin hot strip in a finishing mill of a CSP line and in a conventional hot-strip mill. The goal is to achieve improved strip thickness performance and operational stability.
This paper considers some of the control issues in hot rolling mills. Hence to set the context, first we give a brief description of a typical process. The role of a hot strip mill process is to roll the slabs produced in a continuous casting process and produce strips of …
John G. Lenard, in Primer on Flat Rolling (Second Edition), 2014 2.7 Generation III – Coil Box Hot Strip Mills. In the 1970s, Stelco of Canada developed the hot coil box designed for installation in hot strip mills ahead of the finish mill for coiling the transfer bar from the roughing mill and uncoiling it into the finishing mill. The coil box reduced the distance between the roughing mill ...
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