Fig 1 Thickness control in a single stand cold reversing mill. For the single stand cold reversing mill, the external controllers are (i) the tension control by torque (TCT) in which the entry / exit tensions are kept constant through the torque regulated by the TC that, in turn, exploits the motors applied to the coiler / uncoiler reels, (ii) the gauge control, feedback via gap (GBG) in ...
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This paper focuses on interstand tension control problem in 5stand tandem cold rolling mills. Tension dynamics can be described by a ... [Show full abstract] nominal model perturbed by parametric ...
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The finishing mills roll the transfer bar in tandem, meaning each bar is rolled through all the finishing stands at once. The hot steel is quite fragile as it is rolled and tension between the finishing mill stands must be closely controlled at very low levels in order to avoid stretching or tearing the strip.
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An innovative sliding mode controller for looper and tension control in hot strip finishing mills was developed based on approximately linearized model. Firstly, a fictitious controller of the reduced order subsystem was designed according to desired dynamics, by which, the angle and tension loops were decoupled on the sliding manifold.
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Advantages of the LCM control. Reproducibility of the production data. Traceability of production and process data. Visualization of the warp thread tension. Fabric data storage. Easy to use. Network compatible. Remote access for monitoring and optimization. Communication: CAN (RJ45) or EtherCAT® (RJ45), RS232 (WE series 7015B)
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The looper control of hot strip finishing mill is one of the most critical control items in hot strip rolling mill process. It is a highly complex nonlinear system, with strong states coupling and ...
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Loopertension H∞ control for hot strip finishing mills. Jingcheng Wang Zhaozhun Zhong. Engineering. 2011. The development of an innovative H∞ controller for looper and tension control in hot strip finishing mills is traced based on approximately linearized model. This solution has been considered thanks.. Expand.
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VThe present inventionrelates to tension control for rolling mills wherein tension'ls applied to the work asfit. is being lacted upon by the mill and the invention consists in novel 5 apparatus for controlling suchA tension. ... Thus with the steady load upon the generator circuit, a tension is produced in the strip A which is the result of ...
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Fig 4 Roll configurations in rolling mills. Twohigh mill roll configuration This is the most commonly used rolling mill configuration. In this configuration, there are two horizontally mounted rolls. The rolling mill motor drives either both rolls (top and bottom) or only one roll (normally the bottom roll) with the top roll rotating due to the friction between the roll and the work piece.
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from web tension on a roll. Several models and nominal loads are available Keeping the tension constant in web processes is essential for high product quality and productivity. By Martin Ottosson, Market Communication Manager, Force Measurement, ABB Sweden ABB PillowBlock tension measurement systems quality tension measurement for quality
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The interstand tension control is one of the most important ways to meet tight tolerances for strip product quality during tandem cold rolling process. ... Design of a faulttolerant outputfeedback controller for thickness control in cold rolling mills. 2020, Applied Mathematics and Computation ... Interwire wear and its influence on contact ...
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The combination of automation, process technology, and mechanical equipment is at the heart of the automation and control of the wire rod rolling mill. The objective of a WRM is to reheat and roll the steel billet (input material) into the product 'wire rod'. Wire rods are normally rolled in a highspeed rolling mill, where steel ...
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The Study of Continuous Rolling Mill Interstand Tension Inferential Control Systems DOI: CC BYNCND Authors: Shokhin Permyakova Abstract and Figures The interstand tension...
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The looper control of a hot strip finishing mill is one of the most important control items in the hot strip rolling mill process. Loopers are placed between finishing mill stands and control the mass flow of the two stands. Another important action of the looper is to control the strip tension which influences the width of the strip. So it is very important to control both the looper angle ...
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Certain steelmill loads are fast, cyclic, and of considerable magnitude. Given a set of conditions involving such a load, a relatively small steel mill, speedcontrolled generating capacity all connected to a large powersupply system, much of the swings in the steelmill load will be taken by the large supply system. Of itself, this result may not assume special importance. When ...
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Material tracking is an important part of the automation control system which has a major impact on the product quality. This paper addresses a stand load identification in wire rod mill as a new ...
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Packaging and Containers Manufacturing and Machinery Manufacturing. Referrals increase your chances of interviewing at Hays by 2x. See who you know. Get notified about new Business Controller jobs ...
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tension controlled load mills. The Hot Rolling Process California Steel Tension Controllers Dover Flexo Electronics, Inc. (DFE) May 02, 2012· May 2, 2012 The Millmate Looper Tensiometer load cell (PFTL211CE) is an excellent choice for looper tension measurement in hot rolling mills. Loopers are often introduced in hot finishing ...
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The problem is most severe at low speed, since load disturbances of a given magnitude produce larger perunit speed disturbances at lower speeds. The interstand tension change is proportional to the change in interstand strain which results from changes in the ratio of adjacent stand speeds. ... Optimum strip tension control system for rolling ...
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Looper—tension control among various control problems in hot rolling mills (HRMs) has significance, in particular, because it affects both operational stability of the process and dimensional quality of the products. The control target in this control loop is to maintain looper angle and strip tension simultaneously at their desired values.
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The control scheme realizes decentralization and coordination of the tensionlooper system and allows easy implementation to actual mills. The control scheme was applied to the No. 3 Hot Strip Mill at Chiba Works of Kawasaki Steel Corporation and has been in full commercial operation since 1995. 2. Tension control in hot strip finishing
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Reducing the roll gap increases the roll pressure to p3. Gage control in multiple rolling mills is achieved through measurement of strip thickness using xray gage and adjusting the strip tension using feedback control system. Rolling defects: Mill spring is a defect in which the rolled sheet is thicker than the required thickness because,
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