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 div. Aug 23, 2017 sms group cold rolling pickling line tandem cold mill of jsw steel ltd duration. The small size of the work roll permits superior reductions on very hard materials, such as stainless steel or titanium. A zmill or sendzimir mill is a machine for rolling steel. 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.
The work rolls 1,2 are offset in a horizontal direction relatively to backup rolls 4,5, so that the plane containing the axes a,a extends parallel to but offset relative to the. Keywords sendzimir steel mills, predictive functional control, shape. York, 1994 and by vanda sendzimir or my father the inventor in invention and technology, fall 1995, p. A 20high sendzimir mill is widely used in cold rolling. Extensive experience in the area has led to the perfecting of these hydraulicallyloaded, gaugecontrolled mills for a variety of applications.
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 51. The cold rolling mill supplied by primetals technologies to tangshan iron and steel group co. Some component parts to be modernized or supplied by the purchaser are noted herein. This allows the application of a higher roll pressure without bending the work rolls, which would result in poor metal quality. Over 60 years of experience in hot and cold rolling mills for carbon, stainless steel, and nonferrous rolling mills. Improvements have also been made in the cooling system, in which a plurality of cooling ramps allows the pressure and volume of. Sendzimir mill article about sendzimir mill by the free. Sendzimir mill characteristics cold rolling mill hani tech. Journal of mechanical engineering science 2009 224. Vibration analysis of a sendzimir cold rolling mill and. Improved shape control performance of a sendzimir mill using wavelet radial basis function network and fuzzy logic actuator jeon hyun park, jong shik kim, and seong ik han proceedings of the institution of mechanical engineers, part c.
Sendzimir rolling mill technology and machine design. Edgedrop control behavior for silicon strip cold rolling. Shape control in cluster mills rolling mill technology. Vibration analysis of a sendzimir cold rolling mill and bearing fault detection e brusa, l lemma, and d benasciutti proceedings of the institution of mechanical engineers, part c. Advances in cold rolling technology t sendzimir inc. Predictive functionnal control of a sendzimir cold rolling 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.
The shape control problem for a sendzimir 20roll cold rolling steel mill is characterised by. Cold rolling of stainless steels and application to the actual mill fumio fudanoki jun araki shuichi inoue kazuhiro yanai. Rolling mill technology and machine design sendzimir. The essential difference between sendzimir mill sendzimir cold rolling mill and other types of the mill is the direction of rolling force transmission. Sendzimir, 1985 introduction at the beginning of 1985, the steel and nonferrous industries found themselves in a bind they were faced with low consumption, shrinking markets, higher costs, increased quality demands, and lower prices. We would like to introduce ourselves as one of the leading manufacturers and exporter of wide range of forged hardened steel. Force model and elastic deformation analysis of 20high. Pdf this paper presents the implemtation of a predictive functional controller for the sendzimir 20high. The edges are free of breaks, tears, or slivers, and the surface of the material is cleaner, extending the life of rolls in the cold mill and avoiding skidding or other rolling accidents. Before 90% of the worlds stainless steel strip is used, it is precision rolled to. Vibration analysis of sendzimir cold rolling mill and bearing. Refer to the tapered roller bearing guide or to your timken. Zmill, sendzimir mill, cluster rolling mill waterbury farrel. Among the multicylinder rolling mills, the best known is the sendzimir rolling mill, used for the rolling of the strips.
Pdf this paper presents the implemtation of a predictive functional controller for the sendzimir 20high cold rolling mill. Improved shape control performance of a sendzimir mill using. A static model of a sendzimir mill for use in shape control. They have better gauge accuracy, better shape, and reduced edge drop. The deformation of rolls within the roll system as a whole is analyzed without pinpointing upon each roll and impact on the rolling process. 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. Figure 19 252 element model results for 20high sendzimir cluster mill 59. Our main products include aluminum cast rolling mill, cold rolling mill, aluminum foil rolling machine, tension leveling line, cut to length line, slitting.
Sendzimir cold rolling mill pdf download absiograv. Our precision cold rolling mills have name brand recognition worldwide for gauge accuracy, flatness of strip shape, and ultrathin gauge. A wide variety of sendzimir mill roll options are available to you, such as local service location, warranty, and type. This is brief introduction of cold rolling mill sendzimir mill. This material was rolled by a sendzimir 20high cluster mill with a roll diameter of 60 mm. Optimal control of sendzimir mill 4 developing an optimum control system based on pontryagins maximum principle to get rid of the bottleneck to system response associated with the screwdown device, agc designed to ensure high accuracy without delay in control over a full range of rolling speeds has been realized. Apr 29, 2016 sendzimir rolling mill technology and machine design. Pdf predictive functionnal control of a sendzimir cold. Pdf predictive functionnal control of a sendzimir cold rolling mill. The mechanical model of the work roll, first intermediate roll, second intermediate driven roll, and second intermediate idler roll was proposed and the contact force of each roll was calculated in.
A rolling mill for the treatment of sheet material comprises two work rolls 1, 2 which define a nip between which a web of material 3 is passed for rolling. Innocenti new mid1960s built under license from sendzimir model. Shape control of alloy steel rolled by sendzimir mill springerlink. Sendzimir mill z mill cold rolling steel ametek land. Journal of mechanical engineering science 2014 229. Sendzimir 20 high rolling mill the overall frame structure of the 20high rolling mill has the advantages of great rigidity, bearing the rolling force along the entire width of the rolling mill through the backing bearing, and therefore the longitudinal and lateral dimensional accuracy of the strip is high. The new rolling mill consists of a coupled pickling linetandem cold mill pltcm, a continuous annealing line and a galvanizing line. 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 sendzimir mill zr 1925 12hi rolling mill for stainless steel is now in storage.
Cold rolling mill rolls our cold rolling mills rolls are widely used in cold rolling mills engaed in metal processing and for deforming various metals by passing them through rollers cold rolling mill rolls at a temperature below its recrystallization temperature. We provide the infrared spot m210 thermometer, suitable for a wide temperature range, for this application. A basic understanding of the mechanics of rolling mill rolls file. A z mill or sendzimir mill is a machine for rolling steel. Doc ppt txt pdf xls sendzimir bearings page 1 sendzimir bearings cold rolling mills 20 roll sendzimir mill page 2 sendzimir bearings suffix k158 x 5 page 3 sendzimir bearic k158 5 page 4 sendzimir bearings flow of forces 40 40 60 60 page 5 sendzimir bearings backing shaft wc k158x5 page 6 sendzimir. As is known, sendzimir cold rolling mills feature several roll arrangements, a typical one of which is the 1234 arrangement illustrated in fig. Reversing cold rolling 12hi sendzimir mill material. Advances in cold rolling technology sendzimir zhigh cold rolling mills in the 1980s michael g. It is a modern rolling mills and the rolling is done by one pass. A very large number and high value of spares is included wi. Sendzimir s successful methods for galvanizing steel eventually were implemented in the first z mill rolling silicon steel, making it pliable enough for use in air defense radar. Improved agc control using adaptive technique in cold rolling mill pdf agc control for hi cold rolling mill,high cold rolling mill and an old sendzimir mill the improvements with self adaptive control methods compared to conventional agc control can be judge to at least % more strip. Between 1953 and 1989 he introduced the first productive z mill to great britain, and to japan and canada in the 1950s and 1960s.
The rolling is done in several passes for traditional several stands and reduction that take place successive roll. Scope and contents inventor tadeusz sendzimir, a polish immigrant, designed and installed the first z mill for cold rolling stainless steel in the united states. It consists of a pair of large diameter cylinders on whose circumference other small diameter cylinders planetary are located, which are the work rolls. Stresses from hertzian pressure in 4high cold mill back up rolls were measured. Cold rolling mill rolls, rolls for cold rolling mills.
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