Prior to the cold rolling operation, the hot band is annealed, shotblast and pickled, leaving a comparatively rough and broken surface, as illustrated in the scanning electron micrograph of fig. Advances in cold rolling technology sendzimir zhigh cold rolling mills in the 1980s michael g. The rolling force of sendzimir mill is transferred from the working roll through the intermediate roll to the supporting roll device and eventually to. Our precision cold rolling mills have name brand recognition worldwide for gauge accuracy, flatness of strip shape, and ultrathin gauge. Tadeusz sendzimir originally sedzimir, july 15, 1894, lwow september 1, 1989, jupiter, florida of ostoja coat of arms was a polish engineer and inventor of international renown with 120 patents in mining and metallurgy, 73 of which were awarded to him in the united states. This allows the application of a higher roll pressure without bending the work rolls, which would result in poor metal quality. Sendzimir rolls are used for cold rolling of stainless, silicon and nonferrous grades. Apr 07, 2020 find used or surplus rolling mills, sendzimir, waterburyfarrel, skoda directory of 70000 listings by 1200 suppliers. The machine was built later to stretch and roll copper. Shape control in cluster mills rolling mill technology and.
This sendzimir mill zr 1925 12hi rolling mill for stainless steel is now in storage. Steel rolling technology handbook 2nd revised edition author. Zmill, sendzimir mill, cluster rolling mill waterbury farrel. Analysis of vibration for sendzimir mill in cold rolling. Analytical approaches proposed to compute the dynamic component of the rolling force are used as an input to excite the rolls vibration in the cluster mill simulator. Electro mechanical and hydraulic screw downs programmable pass scheduling remote diagnosis capability model 4098 2hi4hi laoratory rolling mill page 5 laboratory rolling mills. Instead of using multistand four high rolls sendzimir s mill used a clustered nest of rolls, like two inverted pyramids 1234 configuration. 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 complete mill model is presented and contains two parts, the static. Shape control systems for sendzimir steel mills control. Sejal is in charge of the engineering, delivery and commissioning of sendzimir mills invented by dr. In order to clarify the vibration phenomenon in the sendzimir mill, two simulation models were developed to calculate the natural frequencies of sendzimir mill vibration, and the frequencies of mill vibration during the cold rolling of stainless steel strip were measured. Pdf predictive functionnal control of a sendzimir cold rolling mill. Mills rolling carbon steels can be classified in two groups.
Twenty rolls reversible sendzimir cold rolling mill payoff max. Rolling mills, sendzimir national machinery exchange. Fag bearings in a sendzimir mill examples of application engineering publ. In close partnership with the customer, we therefore continually design, test and develop to productionready status new bearings optimally suited to this application. The main disadvantages of sendzimir mill 20hi cold rolling mill. Fag bearings in a sendzimir mill examples of application engineering.
Rolling of metal auxiliary operations used in connection. An investigation into the design and performance of an. Abstract various experimental methods have been used to show the effect of different sendzimir mill rolling parameters on stainless steel strip shape. Such mills, with a variety of shape actuators, offer the control engineer considerable choice in the configuration and design of a shape control system. As is known, sendzimir cold rolling mills feature several roll arrangements, a typical one of which is the 1234 arrangement illustrated in fig. They usually start with strip previously cold rolled on a mill of the first group and 1 meter or less in.
A shape control system based on a wavelet radial basis function network for a sendzimir mill zrm and fuzzy control are developed to improve the shape control performance of a conventional zrm sys. The shape control problem for a sendzimir 20roll cold rolling steel mill is characterised by operation over a wide range of conditions arising from roll changes. Sendzimir, 1985 introduction at the beginning of 1985, the steel and nonferrous industries found themselves in a bind they. Sendzimir s rolling process departed dramatically from the multistand continuous process developed by john tytus armco 1924. While it is true that shapemeter technology is well developed, and operators of cold strip mills. Shape or flatness control for rolled steel strip is becoming increasingly important as customer requirements become more stringent. A rolling mill is a machine for plastic deformation of metal between rotating rolls. The quality of fag and ina backup rollers is ensured by means of high precision machining and sophisticated measurement methods.
Total control of chemical composition, low grindoff, low percentage of accidents, high hardness and toughness, very uniform hardness, high wear resistance, high safety against micro cracks, cracks, spalling and. The rolling is done in several passes for traditional several stands and reduction that take place successive roll. Vibration characteristics analysis of a 20high sendzimir mill with. 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.
In addition, the sendzimir mill is a reversing mill, with shape measurement devices at either end of the mill. Sendzimir rolling mill technology and machine design. Home 49 sendzimir cold reversing mill zr 22 49 sendzimir cold reversing mill zr 22 rolling mills cluster rolling mill description model zr 22 max coil width. Over 60 years of experience in hot and cold rolling mills for carbon, stainless steel, and nonferrous rolling mills. A basic understanding of the mechanics of rolling mill rolls file. Refer to the tapered roller bearing guide or to your timken. Apr 07, 2016 zhengzhou hengzhong heavy machinery manufacturing co. Rolling mill strip wipers allegheny ludlum corporation. Vibration analysis of sendzimir cold rolling mill and.
Numerical results are used to interpret some preliminary experimental measures performed on the operating sendzimir mill. A static model of a sendzimir mill for use in shape control. Predictive functionnal control of a sendzimir cold rolling. A dynamic model coupling vertical and horizontal vibrations is also established to analyze the vibration characteristics of a sendzimir twentyhigh cold roll mill based on the rolling force. Improved shape control performance of a sendzimir mill using. Sendzimir mill with localized defect on the working roller. The videohistory documents the story of a new approach to the rolling process of steel technology transfer and consumer demand for a new product. Sendzimir mill features 20hi cold rolling mill hani tech. Sendzimir mill z mill cold rolling steel ametek land. Effects of rolling parameters on the shape of cold rolled. Extensive experience in the area has led to the perfecting of these hydraulicallyloaded, gaugecontrolled mills for a variety of applications. Sendzimir mill article about sendzimir mill by the free. The z mill uses cascaded supporting rolls instead of using a single pair of rolls to apply force on the small work rolls in the center.
Vibration analysis of a sendzimir cold rolling mill and. A through h containing eccentric saddles and bearings. We provide the infrared spot m210 thermometer, suitable for a wide temperature range, for this application. First evidence of a possible attempt to design a cold rolling mill appears in a sketch by. Some component parts to be modernized or supplied by the purchaser are noted herein. Hot rolled and pickled coil of low carbon steel mill origin. New lowcost shapemeter for smaller rolling mills paper presented at the 2003 aise conference in pittsburgh john w. Inventor tadeusz sendzimir, a polish immigrant, designed and installed the first z mill for cold rolling stainless steel in the united states. Apr 29, 2016 sendzimir rolling mill technology and machine design. The second group of stainless mills could be classified as true strip mills. Figure 2 shows the upper cluster of a typical sendzimir cluster mill.
Hot strip mill sendzimir mill cluster mill annealing line continuous annealing pickling line for cold rolled strip bright annealing line electric arc furnace ld converter hot rolling cold rolling steel making tandem sendzimir mills continuous annealingpickling line sendzimir mill ultrathin strip precision rolling mill finishing mill steckel. Tandem mills can be either of hot or cold rolling mill types. Control of quarter buckle on sendzimir 20h mills semantic scholar. Some component parts to be modernized or supplied by t. Sms group cold rolling pickling line tandem cold mill of jsw steel ltd duration. Cold rolling of stainless steels and application to the actual mill fumio fudanoki jun araki shuichi inoue kazuhiro yanai abstract the model the rolling oil transudation model by whom the decrease of the surface defect and smoothing the surface of the stainless steel cold rolling was formed were constructed by applying channel jacking. In a traditional rolling mill rolling is done in several passes, but in tandem mill there are several stands 2 stands and reductions take place successively.
Shape control in cluster mills michael sendzimir, 1993 cluster mills first came into existence in the 1930s. 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. The essential difference between sendzimir mill sendzimir cold rolling mill and other types of the mill is the direction of rolling force transmission. 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. Zmill, sendzimir mill, cluster rolling mill waterbury. It allows the application of a higher roll pressure without bending the work rolls, which would result in poor metal quality. One group rolls highcarbon steel in narrow widths for saw blades and measuring tapes. Pdf predictive functionnal control of a sendzimir cold. This paper presents the implemtation of a predictive functional controller for the sendzimir 20high cold rolling mill. Online calculation of time optimal pass sequences for cold rolling on sendzimir mills anmelden. Edgedrop control behavior for silicon strip cold rolling. 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. The problem of control of strip flatness in cold rolling has challenged the industry for a long time. In the cold rolling process, a hotrolled coil is made thinner by passing it between two rolls at room temperature.
Auto slow down2 accuracy gamma ray thickness measuring systems mill motor. Our precision cold rolling mills have name brand recognition worldwide for. Open type backing roll bearings for sendzimir cold strip mill 10. Effects of rolling parameters on the shape of cold rolled strip. Cold rolling mill facility for steel coil and sheet. Find sendzimir, demag, hitachi, bliss, mino, continental, davy mckee, loewy, nash, and spidem for sale on machinio. Zmill 20 hi cluster type mill the waterbury farrel sendzimir rolling mill is the final answer to the need for highly precise, closetolerance rolled products. The components considered in a robust control design are detailed in fig. Z mill 20 hi cluster type mill the waterbury farrel sendzimir rolling mill is the final answer to the need for highly precise, closetolerance rolled products. Experiments using sister coils, noting the effects of change over a number of coils, and using the taguchi statistical. Figure 19 252 element model results for 20high sendzimir cluster mill. A z mill or sendzimir mill is a machine for rolling steel. Sendzimir planetary mills single planetary mills the kruppplatzer planetary mill. Shape control in cluster mills michael sendzimir, 1993.
This paper presents a system for the realtime optin1ization of the cold rolling processes for the 20 rolls sendzimir cluster mill. This is due to the complexity of the control system design on such a mill, where many more degrees of freedom for. Thus, the mastery of edgedrop control behavior for silicon strip cold rolling with a sendzimir mill is beneficial for the improvement of the strip profile quality. Sendzimir mill characteristics cold rolling mill hani tech.
Specifically, in a fivestand tandem cold mill tcm in 18hs design, reductions of up to 70% are possible. Vibration analysis of sendzimir cold rolling mill and bearing. A method of sensing the strain induced in the sendzimir mill housing has been investigated and a complex relation between strain, roll separating force and roll stack geometry has been observed. Three stage age for tandem cold mill feedforward agc for tandem cold mill flowstress feedforward agc noninteractive agc. Predictive functionnal control of a sendzimir cold rolling mill.
Product quality and low scrap rates are supported during this highpressure rolling process by accurate noncontact temperature measurements. Pdf this paper presents the implemtation of a predictive functional controller for the sendzimir 20high cold rolling mill. This is brief introduction of cold rolling mill sendzimir mill. 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. Pdf edgedrop control behavior for silicon strip cold. In a broader sense, a rolling mill is an automatic system or line of machines that performs both rolling and auxiliary operations. Online calculation of time optimal pass sequences for. They are characterized by smalldiameter work rolls that are supported by a cluster of rolls as shown in figure 1 which shows the location of eight backing assembly shafts. Cold rolling of stainless steels and application to the actual mill fumio fudanoki jun araki shuichi inoue kazuhiro yanai abstract the model the rolling oil transudation model by whom the decrease of the surface defect and smoothing the surface of the stainless steel coldrolling was formed were constructed by applying channel jacking. 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.
Steel rolling technology handbook 2nd revised edition. Not only is the thickness of the material made uniform, but the internal structure is made homogeneous at a microscopic level, and the surface of the roll is transferred to the material to provide a polished finish. Automatic shape control is now more or less mandatory on all new fourhigh cold mills, but no comprehensive scheme yet exists on a sendzimir mill. Integrated pollution prevention and control ippc reference document on best available techniques in the ferrous metals processing.
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