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US2242346A - Tension control for rolling mills - Google Patents Tension control for rolling mills Download PDF Info Publication number US2242346A ... tension booster speed controlling roller Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and ...
The Manual Rolling Mill was the very first product produced by Durston Tools, we have expanded this product line over the years and now offer a huge range to suit the needs of Creators to Specialist Jewellers. Our Manual Jewellers …
Sometimes in metal rolling practice, tension, (force), is applied to a work piece as it is being rolled. This tension may be applied to the front, (front tension), the back, (back tension), or both sides. This technique will assist the forces necessary to form the work, and is usually used on hard to roll materials.
This is the second webinar of a three-part webinar series that will highlight the use of MathWorks products for modeling and control of a multi-stage rolling mill process. In this particular webinar you will learn how to use MathWorks products to model the looper-strip interaction for …
Rolling Mill Sensors Tension Measuring Systems. The dependability and the accuracy of the TWS Tensiometer is a requirement in the heavy applications and harsh environment of the rolling mills. Full systems engineering applications are included with all TWS sys-tems. The system consists of high performance strain gage load cells constructed to ...
In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. The concept is similar to the rolling of dough. Rolling is …
NIPPON STEEL ENGINEERING CO., LTD.'s 4Hi skin-pass mill is a robust facility with high levels of mill rigidity. Our proprietary rolling control (position control and auto force control) and texture control technologies also enable a high-quality strip surface appearance to be obtained stably. In addition, work roll cleaning is performed using ...
In tension control systems, the node for dynamic compensation of disturbance caused by a change in the speed of the rolling stand of cold-rolled sheet mills can contain only one channel that compensates only for the dynamic component. The limitation of the disturbance component due to the inaccuracy in the operation of the indirect torque ...
Reducing the roll gap increases the roll pressure to p3. Gage control in multiple rolling mills is achieved through measurement of strip thickness using x-ray gage and adjusting the strip tension using feedback control system. 1.8 Rolling defects: Mill spring is a defect in which the rolled sheet is thicker than the required thickness because,
A tandem rolling mill is a rolling mill with two or more close-coupled stands, where the reduction is achieved by the inter-stand tension(s) and the compressive force between the work rolls.. For mills rolling thinner strip, bridles may be added either at the entry and/or the exit to increase the strip tension near the adjacent stands further increasing their reduction capability.
If the mill rolls 800,000 tons per year, it runs at an average production rate of 114.16 tons/hour. If the utilization can be improved by 1 %, the available rolling hours is 365 x 24 x 0.81 = 7096.6, creating 87.6 extra rolling hours. At 114.16 tons/hour that is an additional 10,000 tons can be rolled.
High consistency in rolling mill operation requires a high accuracy in tension measurement. The BLH Nobel strip tension systems for rolling mills measures the actual resultant strip tension force, as opposed to measuring the indirect force given by the electrical drives current, increasing measuring accuracy and reactivity.
B21B1/16 — Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like ...
A rolling mill strip tension monitoring assembly has a roll supporting structure which supports a plurality of pivotally mounted rolls. A sensor support is movably secured to the roll supporting means such that movement of the rolls other than axial rotational movement will effect a change in relative position between the noncontacting sensor array and the roll support.
tension. In general, rolling with low tension in roughing mill is a fundamental condition to ensure the stable rolling quality [2], [3]. This paper proposes the fuzzy control structure for the roughing mill in Slovakia Steel Mills, a.s. Strážske. The given roughing mill consists of six rolling stands (STD), individually driven by motors ...
The plant model is a rolling mill that uses a looper for tension control . Tension is caused by the difference between the exit speed v 1 in stand one and the entry speed v 2 in stand two. Looper height is related to looper storage length by the mass conservation principle and can be empirically approximated by (1) H(t)= 1 α+β L(t).
August 24-29, 2014 Control of Strip Tension in a Rolling Mill Based on Loopers and Impedance Control A. Steinboeck G. M¨ hlberger A. Kugi u Automation and Control Institute, Vienna University of Technology, Gußhausstraße 27-29, 1040 Vienna, Austria (e-mail: [email protected]) Abstract: A mathematical model of a strip-looper ...
Skin Pass Mill (Leveling & Tensioning Cold Rolling Mill) Skin pass mill can be 2-Hi or 4-Hi structure, to improve the steel strip by S tensioning rollers and rolling mill. The flatness of cold rolled steel strip is not so good after annealing, skin pass line can largely diminish yield platform and improve the mechanical properties of annealed ...
The problem of achieving minimum bar tension in a merchant bar rolling mill without direct tension measurement is considered. A non-linear state-space process model which represents the mill dynamics has been developed, and a control scheme is proposed which incorporates an Extended Kalman Filter for estimation of bar tension, and optimal state …
The process of thermo-mechanically controlled rolling in the conditions of Steckel mill of Ferriera Valsider plant was developed for the first time for hot-rolled coils in the sizes of 12 mm × ...
(1) depends on looper angle, while the looper angle is affected by the strip tension in Eq. (2). Therefore there is an interaction between the looper angle and strip tension. This interaction makes it difficult to design a controller and the obvious consequence is degraded control performance and stability. 2.2. Disturbances
American Steel explains the differences between a four-high rolling mill, cluster rolling mill, continuous mill and a planetary rolling mill. 419.843.6051; [email protected] ... The uni-coiler and wind up reel not only feed …
High-precision roll cartridges with bearing cooling, available as 2Hi and 4Hi Roll Sets. Temperature controlled high accuracy thickness and width measurement – contact and laser gauges. Precise layer winding systems to satisfy the highest quality standards. Wire tension control via electromagnetic high-precision dancer.
John Cockerill has amassed over 30 years' experience in the design and production of rolling mills. Its latest-generation cold rolling mills are designed to be extremely efficient and flexible and to consistently meet the specific needs …
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 bar proceeds through the mill. A …
BACKGROUND OF THE INVENTION. The present invention relates generally to multistand metal rolling mills, and more particularly to a method of improved control of interstand tension in …
During the rolling of the OF-Cu bars the rolling force was measured. There were no forward and backward tensions applied on the copper bars and rolling speed was reduced to a minimum of about 0.75 m/min. The strip thickness h1 and breadth b1 were measured afterwards so that the contact area could be calculated. 3.2.2 Specimen preparation
Control of Strip Tension in a Rolling Mill Based on Loopers and Impedance Control. A. Steinboeck, G. Mühlberger, A. Kugi. Engineering. 2014. Abstract A mathematical model of a strip-looper system of a hot strip tandem rolling mill is developed using Hamilton's principle and the Galerkin weighted residual method.
What Is A Rolling Mill? In metalworking, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. The concept is similar to …