2 edition of Incremental control equations for multiple stand rolling mills. found in the catalog.
Incremental control equations for multiple stand rolling mills.
John H. Courcoulas
Written in English
Thesis (M.ApSc.) -- University of Toronto, 1955.
|The Physical Object|
The PC mill was first used commercially for the continuous hot rolling mill of Hirohata, which was commissioned in , and then for the former stands of the finishing mill train of the continuous hot rolling mill of Nagoya, and also for the finishing stand of the Kimitsu plate mill. New rolling processes for long products. Abstract: This paper describes the simulation of a multiple-stand hot strip mill and its application for the development of complex control strategies. Both controlled system structure and control functions are explained. The application of advanced control techniques and dynamic simulation improves the thickness tolerances drastically.
be fully integrated in the mill control network. Water-Cooled Test Head The sensor is a robust, water-cooled test head through which the hot material passes after it leaves the rolling stands (Figure 5). Product diameters that can be tested range from mm with three different inspection head sizes. Normally, the test head is installed. Comparison of conventional and prestressed mill stand 28 for ″ & 18″×18″ mill 4-Hi hydraulic stand with roll load cylinder 29 Simple rolling process with rectangular stock 31 Deformation of billet in rolling 32 Entry of material into the roll gap 34 Position of neutral point
Rolling processes introduction: Rolling is the process of reducing the thickness or changing the cross section of a long workpiece by compressive forces applied through a set of rolls, as shown in figure (). Fig. () Most rolling is carried out by hot working, called hot rolling, owing to the large amount of deformation required. steel making technology, basic principles of width change, plate mills, hot strip mills, quality assurance, testing and inspection, bar and rod mills. It will be a standard reference book for professionals, entrepreneurs, those studying and researching in this important area and others interested in the field of steel rolling. Contents CHAPTER 1.
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Rolls are tools used in rolling mills to reduce the cross section of metal stock. The weight of rolls may vary from a few kilograms up to tonnes. Under rolling conditions the contact area between roll and stock suffers wear, the other parts of a roll - body and necks - have to be considered as normal parts of designed components under high.
Fig. A Typical Rolling Mill With n Stands. The basic equations which govern the relationship of system variables are formed by the characteristics of the material and the mechanical variables, in which the index i corresponds to the ith stand.
The rolling force equation for the ith stand is given by an implicit function as Incremental control equations for multiple stand rolling mills.
book P i (H 1 H i. In this paper a fully neural network-based structure have been proposed to control speeds of rolling stands of a steel rolling mill. The structure has property of controlling the motors speed such. The rolling force equation for the i t h stand is given by an implicit function as Digital Optimal Control of Multi-stand Rolling Mills Incremental sheet metal forming.
Equilibrium equations ensure force and moment balance of the strip and each roll. A complete linear system is established by assembling compatibility and equilibrium equations. The contact rolling pressure distribution and the rigid motion of the roll chocks can be solved.
Roll surface contours and strip profiles can be further calculated Cited by: 9. USA USA USA US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords roll roll stand gauge stand speed Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
AN ABSTRACT OF THE THESIS OF JOHN HUNT SLOANE for the M. in Electrical Engineering (Name) Date thesis is presented (Degree) (Major) Title THE DEVELOPMENT OF THE THEORY OF METAL ROLLING AND ITS APPLICATION TO ROLLING MILL CONTROL.
Abstract approved (Major professor) The relationships of the variables of a process to be control- led are expressed in a. Incremental Control Equations for Tandem Rolling Mills, AIEE, Edwards, W. and Wallace, G. Experiences in Commissioning of Cold Rolling Mill Flatness Control Systems, Institution of Engineers (Australia), Control '92 Conference, Perth.
The ideal characteristics of a strip thickness control system operating on the upstream stands of a tandem mill are defined.
The historical developmen. USA USA USA USA US A US A US A US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords pass workpiece increment roll thickness Prior art date Legal status (The legal status is an assumption and is not a legal. next-generation rolling mill stand FEATURES AND BENEFITS OF THE NEW HYPER UNIVERSAL CROWN-CONTROL MILL FOR HIGHER REDUCTIONS IN COLD ROLLING Primetals Technologies has developed a new Universal Crown-Control Mill (HYPER UCM) that features work rolls with diameters that are 20% to 40% smaller than those used in conventional UCM mills.
As the bar progresses through a continuous mill where the bar is rolled in multiple stands simultaneously, the stand speed must be controlled to ensure tension free rolling. The main methods of controlling the tension in the mill is with a tension free rolling speed control system and manually monitoring the current drawn by each motor as the.
I claim: 1. A gauge control system for a rolling mill having at least one mill stand with an adjustable screwdown for controlling the roll opening thereof through which a sheet metal workpiece is fed during a rolling mill run for reducing the thickness of the workpiece from an input gauge to an output gauge, screwdown adjustment means for adjusting the mill stand screwdown and thereby to.
fuzzy control modiﬁcation and Elman dynamic recursive network-combined prediction was used by Jia, Shan, and Niu (), to predict the rolling force for a tandem cold mill.
A multiple radial basis function neural network model to predict rolling force based on wavelet analysis was proposed by Liu, Tong, and Lin (). In their model, the.
Four-high mills are used for rolling flat material, like sheets and plates, and represent a special type of two-high mill for both hot and cold rolling, in which large backing-up rolls are employed to reinforce the smaller working rolls: either the working or back-up rolls may be driven.
The rolling mill stand requires very rigid construction and large motors to supply enough power. There are several types of rolling mill stands as given below. Two- high stand – It is the basic type of rolling mill stand in which two opposing rolls are used.
The stand has non reversing rolls rotating in same direction. description of the cold rolling process is presented. In Section 3, a mathematical model has been driven for sin-gle-stand cold rolling mill.
In Section 4, architecture and learning algorithm Fuzzy Neural Networkof have been presented. In Section 5, thickness control with roll ec-centricity compensation has been proposed.
In Section 6. In this paper, we propose an effective mechanical-electrical-hydraulic-interfacial coupling vibration model for hot rolling mills and obtain a practical measure to relieve mill vibration. First, an experiment related to mill modulus control gain in automatic gauge control (AGC) is carried out during manufacturing.
Rolling mill vibration is observed to gradually be enhanced with increasing mill. The rolling mill process consists of introducing a strip inside two rotating rolls causing a permanent de-formation in this strip, it is called thickness reduction. The stands, and rotary rolls, are the machines that make the rolling mill process.
A Tandem Rolling Mill is a set of rolling mill stands. Keywords: Rolling mill, Roll load, Robert, strain gauges I.
INTRODUCTION Rolls are the the most basic part in a rolling mill. Forces because of deformation of plate are transmitted to them directly, and then are transmitted to other parts like bearings, housings, etc. Rolls failure is a common problem faced by the rolling.
control system in cold mills, flat rolling practice cold rolling, pack rolling, steelmaking refractories, refining of stainless steels, special considerations in refining stainless steels etc. This book is a unique compilation and it draws together in a single source technical principles of steel making.The multiple-root resonance theory is introduced.
The multiple-root resonance region is defined, and it includes the sub-multiple-root resonance region and complete-multiple-root resonance region. It is proved that the vibration mode shapes are identical if the natural frequencies are similar in size. The dynamic analysis of the 3-DOF model is investigated, and the results show that the.rolling campaign for another production range (just through a different recipe set on HMI).
Another great result is an excellent repeatability and profile accuracy of the resulting bar that is going to be loaded into the downstream finishing rolling mill. Roughing mill with horizontal sliding reversible stand.