Zmill, sendzimir mill, cluster rolling mill waterbury. The essential difference between sendzimir mill sendzimir cold rolling mill and other types of the mill is the direction of rolling force transmission. Our threegroup 20high sendzimir cold rolling mill handles a diverse range of rolling demands. Through this method, the cem function of the 20high sendzimir mill and the deflection function expression of every roll are obtained. Pdf shape control systems for sendzimir steel mills semantic. 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. 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. Sendzimir s rolling process departed dramatically from the multistand continuous process developed by john tytus armco 1924. Pdf deals with the problem of shape or flatness control for sendzimir 20roll cold rolling steel mills. The stressometer consists of a segmented roll, with 31 in ness control for sendzimir 20roll cold rolling steel mills. This allows the application of a higher roll pressure without bending the work rolls, which would result in poor metal quality. Sendzimir 32 zhi sendzimir 6732 reversing cold rolling mill. A basic understanding of the mechanics of rolling mill rolls file. Rolling mills, sendzimir national machinery exchange.
Product quality and low scrap rates are supported during this highpressure rolling process by accurate noncontact temperature measurements. 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 the solid overall stand. Rolling mill guide pdf stresses from hertzian pressure in 4high cold mill back up rolls were measured. Unlike a traditional rolling mill this 20high cluster mill configuration utilizes cascaded supporting rolls to. The second group of stainless mills could be classified as true strip mills. Numerical analysis of roll deflection for sendzimir mill.
Lubrication characterisation analysis of stainless steel foil. The 20 hi sendzimiar mill has been used for reduction of varieties plate thickness. Instead of using multistand four high rolls sendzimir s mill used a clustered nest of rolls, like two inverted pyramids 1234 configuration. 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. The components considered in a robust control design are detailed in fig. Shape control of alloy steel rolled by sendzimir mill.
Rolls are tools used in rolling mills to reduce the cross section of metal stock. Calculation and analysis of force in roll system of 20high. A computational software sm4sm for the sendzimir mill has been developed, by which the deflection condition of rolls s. The expert system has been successfully implemented for load prediction in this plant for 20 hi sendzimiar mill. Sendzimir 20 high cold rolling mill manufactured by dms under license of sendzimir inc. Edgedrop control behavior for silicon strip cold rolling. Such mills, with a variety of shape actuators, offer the control. Vibration characteristic analysis of twentyhigh rolling. 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. Rolling mill optimization using an accurate and rapid new. Item specification 1 type cold rolling mill 2 raw material copper strip, copper rod or copper coil 3 finished product copper strip, copper rod or copper coil 4 rolling presssure 80t 5 roller dia. 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.
The static model represents the rolling cluster, while the dy manuscript received december 3, 1997. 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. Sendzimir cold rolling mill pdf download absiograv. Jp2008114272a automatic gauge control method and apparatus. The main types of rolling mills are named according to the number of cylinders which make up each rolling stand. Deals with the problem of shape or flatness control for sendzimir 20roll cold rolling steel mills. This mill is sold as a mill stand and internals only. It may help in planning the maintenance operation of rolls and bearings and in reducing the service costs.
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. The static model derived enables shape profiles to be calculated for a given set of. 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. Ideal for an annual production of 100,000 to 500,000 t are our singlestand reversing mills rcm. Pdf predictive functionnal control of a sendzimir cold. Sendzimir mill characteristics cold rolling mill hani tech. Such dividual segments, where four pressure measurements per revo mills, with a variety of shape. Pdf this paper presents the implemtation of a predictive functional controller for the sendzimir 20high cold rolling mill. Rolling mill capable of increased torque transmission t. They usually start with strip previously cold rolled on a mill of the first group and 1 meter or less in. We provide the infrared spot m210 thermometer, suitable for a wide temperature range, for this application. Cold rolling mills solutions nidec industrial solutions. 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.
Pdf shape control systems for sendzimir steel mills researchgate. 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 intermediate rolls may be provided with tapers and be axially adjustable as on sendzimir cluster mills. The major work carried out in this industry is based on the cold rolling. 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. 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. The calculation of force for a roll system has significant effects on cold rolled thin strip gauge adjustment of a 20high sendzimir mill.
Sendzimir model used zhigh zr 6732 cold mill new in 2000 note. Analysis of roll gap pressure in sendzimir mill by fem. A z mill or sendzimir mill is a machine for rolling steel. A zmill or sendzimir mill is a machine for rolling steel. Sendzimir mill z mill cold rolling steel ametek land. 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. 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.
Nippon steel corporation has successfully developed and put into commercial use two computerbased optimum control techniques for sendzimir mills. A numerical simulator developed in the matlabsimulink. Jul 01, 2014 since the structure of the sendzimir twentyhigh roll mill is symmetrical, the upper part is the main object for study. 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.
Vibration characteristics analysis of a 20high sendzimir mill with. 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 sendzimir mill arch is integrally cast and prestressed, and a circular arc track is provided in the arch to secure the backup roll. We are a leading distributor of mill rolls to the north american steel mill industry, with significant share of the long bar market. 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. Figure 2 shows the upper cluster of a typical sendzi. Extensive experience in the area has led to the perfecting of these hydraulicallyloaded, gaugecontrolled mills for a variety of applications. Li, hongbo zhao, zhenwei dong, dawei han, guomin zhang, jie liu, haichao you, xuechang journal. Metallic foil is mostly obtained by multipass rolling process through cluster multi roll mills, such as sendzimir mill, 12high cluster type etc. Quarter waves were simulated by elastic deformation analysis of rolls considering bending deformation of back up rolls and the effect of control actuators on.
The videohistory documents the story of a new approach to the rolling process of steel technology transfer and consumer demand for a new product. 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. We are a hot rolling mill manufacturing company working mainly in the area of bar and wire rod. This is the fundamental part of the mill, and consists mainly of working cylinders. 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. Pdf predictive functionnal control of a sendzimir cold rolling mill.
Keywords keywords cluster cold rolling mill, vibration monitoring, bearing fault diagnosis, numerical methods. Sendzimir mill article about sendzimir mill by the free. The determination rolling load is very important in this study. Vibration characteristic analysis of twentyhigh rolling mill. This paper presents the implemtation of a predictive functional controller for the sendzimir 20high cold rolling mill.
The complete mill model is presented and contains two parts, the static. Zmill, sendzimir mill, cluster rolling mill waterbury farrel. 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. Predictive functionnal control of a sendzimir cold rolling mill. Buy, sell and rebuild secondhand steel mill equipment worldwide. Edgedrop control behavior for silicon strip cold rolling with a sendzimir mill author. Stresses from hertzian pressure in 4high cold mill back up rolls were measured years ago, the. Inventor tadeusz sendzimir, a polish immigrant, designed and installed the first z mill for cold rolling stainless steel in the united states. Our solutions cover all types of cold rolling mills for flat products including. Sendzimir mill features 20hi cold rolling mill hani tech. As is known, sendzimir cold rolling mills feature several roll arrangements, a typical one of which is the 1234 arrangement illustrated in fig. The cluster configuration transmits the roll separating force from the work rolls to the mill housing. Vibration analysis of a sendzimir cold rolling mill and.
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