Inventor tadeusz sendzimir, a polish immigrant, designed and installed the first z mill for cold rolling stainless steel in the united states. Vibration characteristic analysis of twentyhigh rolling. The intermediate rolls may be provided with tapers and be axially adjustable as on sendzimir cluster mills. In this article, the authors investigate the dynamic behaviour of a sendzimir mill. The rolling force of sendzimir mill is transferred from the working roll through the intermediate roll to the supporting roll device and eventually to. In order to improve quarter waves occurred in the wide and thin gauged alloy steel rolled by 20high sendzimir mill, a computer simulation based on the divided element method and an actual cold rolling experiment were carried out. Analysis of roll gap pressure in sendzimir mill by fem. Shape control options on the sendzimir cluster type mill figure 2 shows the upper cluster of a typical sendzimir cluster mill. Sendzimir mill article about sendzimir mill by the free. This mill is sold as a mill stand and internals only. Gaylor was a logical choice for the project because the company had previously completed the original facility in 1990, which required construction of a sendzimir mill a rolling mill for cold rolling materials such as stainless steel and a grinding and polishing line, among other structures.
Vibration characteristics analysis of a 20high sendzimir mill with. Sendzimir s rolling process departed dramatically from the multistand continuous process developed by john tytus armco 1924. Metal plate, sheet, or strip hereafter collectively referred to as strip, such as steel, aluminum, or copper is manufactured on hot and cold rolling mills having various. Edgedrop control behavior for silicon strip cold rolling with a sendzimir mill author. Rolling mill optimization using an accurate and rapid new. The second group of stainless mills could be classified as true strip mills. Quarter waves were simulated by elastic deformation analysis of rolls considering bending deformation of back up rolls and the effect of control actuators on. Li, hongbo zhao, zhenwei dong, dawei han, guomin zhang, jie liu, haichao you.
The determination rolling load is very important in this study. It may help in planning the maintenance operation of rolls and bearings and in reducing the service costs. Jul 01, 2014 since the structure of the sendzimir twentyhigh roll mill is symmetrical, the upper part is the main object for study. Sendzimir mill model is a reversing mill, shapemeters are placed at both sides of the the mill model is divided into static and dynamic sections. They usually start with strip previously cold rolled on a mill of the first group and 1 meter or less in. Zmill, sendzimir mill, cluster rolling mill waterbury. A numerical simulator developed in the matlabsimulink. Predictive functionnal control of a sendzimir cold rolling mill. Nandedkar 2002 software development for load prediction rolling of thin sheet in 20hi sendzimir mill by using simulation, national conference on recent trends in mfg. Numerical analysis of roll deflection for sendzimir mill.
This paper presents the implemtation of a predictive functional controller for the sendzimir 20high cold rolling mill. Pdf this paper presents the implemtation of a predictive functional controller for the sendzimir 20high cold rolling mill. A z mill or sendzimir mill is a machine for rolling steel. The 20 hi sendzimiar mill has been used for reduction of varieties plate thickness. The cluster configuration transmits the roll separating force from the work rolls to the mill housing. The expert system has been successfully implemented for load prediction in this plant for 20 hi sendzimiar mill. Sendzimir s 20high mills are unique in that they have a small, chockless work roll and a cluster roll configuration supported by the backing assemblies. The calculation of force for a roll system has significant effects on cold rolled thin strip gauge adjustment of a 20high sendzimir mill. We are a hot rolling mill manufacturing company working mainly in the area of bar and. Such dividual segments, where four pressure measurements per revo mills, with a variety of shape. Metallic foil is mostly obtained by multipass rolling process through cluster multi roll mills, such as sendzimir mill, 12high cluster type etc. Sendzimir cold rolling mill pdf download absiograv.
All the intermediate rolls are fixed on the arch by the suspension hydraulic cylinders on the transmission side and the operation side, and the suspension force is set according to the weight of the roller body. Vibration analysis of a sendzimir cold rolling mill and. Our solutions cover all types of cold rolling mills for flat products including. The essential difference between sendzimir mill sendzimir cold rolling mill and other types of the mill is the direction of rolling force transmission. The videohistory documents the story of a new approach to the rolling process of steel technology transfer and consumer demand for a new product. We provide the infrared spot m210 thermometer, suitable for a wide temperature range, for this application. Pdf predictive functionnal control of a sendzimir cold rolling mill. Such mills, with a variety of shape actuators, offer the control. Keywords keywords cluster cold rolling mill, vibration monitoring, bearing fault diagnosis, numerical methods. Tandem rolling h 0 v 0 w 0 h 1 v 1 w 1 h 2 v 2 w 2 h 3 v 3 w 3 h f v f w f h 0 h 1 h. As is known, sendzimir cold rolling mills feature several roll arrangements, a typical one of which is the 1234 arrangement illustrated in fig. Zmill, sendzimir mill, cluster rolling mill waterbury farrel. Buy, sell and rebuild secondhand steel mill equipment worldwide. Our threegroup 20high sendzimir cold rolling mill handles a diverse range of rolling demands.
Sendzimir model used zhigh zr 6732 cold mill new in 2000 note. Moreover, cold rolling is the key process for the thin strip edgedrop control, and a sendzimir mill is one of the most popular cold rolling mills for silicon strips. A sheffield hallam university thesis shura sheffield hallam. Sendzimir mill z mill cold rolling steel ametek land. The sendzimir mill arch is integrally cast and prestressed, and a circular arc track is provided in the arch to secure the backup roll. Rolling mill guide pdf stresses from hertzian pressure in 4high cold mill back up rolls were measured. The static model derived enables shape profiles to be calculated for a given set of.
A zmill or sendzimir mill is a machine for rolling steel. Pdf shape control systems for sendzimir steel mills. Li, hongbo zhao, zhenwei dong, dawei han, guomin zhang, jie liu, haichao you, xuechang journal. A basic understanding of the mechanics of rolling mill rolls file. Nippon steel corporation has successfully developed and put into commercial use two computerbased optimum control techniques for sendzimir mills. Stresses from hertzian pressure in 4high cold mill back up rolls were measured years ago, the. In addition to examples with the common 4high vertical stand rolling mill, application of the presented method to the most complex of rolling mill configurations is demonstrated with an optimization example involving the 20high sendzimir mill. Unlike a traditional rolling mill this 20high cluster mill configuration utilizes cascaded supporting rolls to apply force on the small work rolls in the center. Rolling mill capable of increased torque transmission t.
A four high mill, on the other hand of the same 72 inch width, would have a minimum work roll diameter of about 20 inches. Contact element method with two relative coordinates and its application of prediction of strip profile for a sendzimir mill j. We are a hot rolling mill manufacturing company working mainly in the area of bar and wire rod. The main types of rolling mills are named according to the number of cylinders which make up each rolling stand. Stresses from hertzian pressure in 4high cold mill back up rolls were measured years ago, the results were never published, but of high interest also, maybe later. This allows the application of a higher roll pressure without bending the work rolls, which would result in poor metal quality. Calculation and analysis of force in roll system of 20high. Sendzimir 32 zhi sendzimir 6732 reversing cold rolling mill. A complete dynamic analysis of the cluster mill layout has seldom been proposed in the literature. Specializing in hot and cold rolling mills for producing flat and long products. To provide an automatic gauge control method in a sendzimir mill in which the offset from the target thickness of the outletside thickness of a portion corresponding to a saddle position where shape control operation is performed in accordance with the shape of a material to be rolled is prevented and an apparatus used for it.
For a quote or more information on the items shown, check the box at the start of the line and fill in your contact information at the bottom of the screen. Instead of using multistand four high rolls sendzimir s mill used a clustered nest of rolls, like two inverted pyramids 1234 configuration. A rolling mill arrangement is disclosed in which a basically sixhigh mill has intermediate rolls which have no necks and are supported laterally by side support roller assemblies, and in which the work rolls are also laterally supported, whereby higher torque may be delivered to the mill to obtain heavier reductions without lateral flexure of the intermediate rolls. Sendzimir 20 high cold rolling mill manufactured by dms under license of sendzimir inc. On the early mills of the 1950s, crown adjustment was provided on shafts d by manually rotating adjustment nuts located just above the mill window. Unlike machining, which cuts through the grains of the metal, the rolling of threads causes improved strength, because of cold working and favorable grain flow. Sendzimir mill features 20hi cold rolling mill hani tech. Cold rolling mills solutions nidec industrial solutions.
Extensive experience in the area has led to the perfecting of these hydraulicallyloaded, gaugecontrolled mills for a variety of applications. The rolling force of sendzimir mill is transferred from the working roll through the intermediate roll to the supporting roll device and eventually to the solid overall stand. Pdf shape control systems for sendzimir steel mills researchgate. Unlike a traditional rolling mill this 20high cluster mill configuration utilizes cascaded supporting rolls to. Pdf deals with the problem of shape or flatness control for sendzimir 20roll cold rolling steel mills. Through this method, the cem function of the 20high sendzimir mill and the deflection function expression of every roll are obtained. Figure 2 shows the upper cluster of a typical sendzi. Rolling mills, sendzimir national machinery exchange.
Deals with the problem of shape or flatness control for sendzimir 20roll cold rolling steel mills. A computational software sm4sm for the sendzimir mill has been developed, by which the deflection condition of rolls s. The major work carried out in this industry is based on the cold rolling. The components considered in a robust control design are detailed in fig.
Ideal for an annual production of 100,000 to 500,000 t are our singlestand reversing mills rcm. The stressometer consists of a segmented roll, with 31 in ness control for sendzimir 20roll cold rolling steel mills. Sendzimir mill characteristics cold rolling mill hani tech. Pdf shape control systems for sendzimir steel mills semantic. Rolls are tools used in rolling mills to reduce the cross section of metal stock. Pdf shape control systems for sendzimir steel mills john. To complete this study, a fully instrumented cold rolling mill has to be used in order to measure all the dynamic signals required to detect the relevant phenomena that have to be prevented. Vibration characteristic analysis of twentyhigh rolling mill. The static model represents the rolling cluster, while the dy manuscript received december 3, 1997. This is the fundamental part of the mill, and consists mainly of working cylinders. Edgedrop control behavior for silicon strip cold rolling. The complete mill model is presented and contains two parts, the static. Lubrication characterisation analysis of stainless steel foil.
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