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Loopers are arranged in the finishing mill area for tension-free rolling. Loopers are of two types Vertical Loopers & Horizontal Loopers. Installation Of loopers in modern steel mill ensures tension free rolling mill bars which in turns decrease miss rolls and enhances production capacity. Loopers works with Automatic Sensor called LOOP SCANNER.
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Key learnings: Control System Definition: A control system is a set of devices that directs and manages the behavior of other systems to achieve specific results through regulation and control.; Open-Loop Examples: In open-loop control systems, operations such as using a manual light switch or setting a timer on a bread toaster are …
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Automated mill control using vibration signal processing. Abstract: Historically many different signals have been employed in the quest for optimal …
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control loop between recycle elevator power and mill . ... mill automatic operation with duration equal to T oper, a new set of (k v, T d, Q 0, PV 0, A 1) is generated, satis-
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Tension and looper control in finishing mills: ASR—Automatic Speed Regulator, ACR—Automatic Current Regulator. ... the SC scheme are relatively stable regardless of the rolling conditions because the SC scheme acts on the looper speed control loop so that it can absorb changes in the looper load torque caused by tension …
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The complex control systems have been applied to hot rolling processes and, now, the control area covers the whole line. The process technology of hot strip mill has matured; however, the development of advanced control in this area is still active, for the reason that the demand to improve quality has become increasingly severe.
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The mill speed is inversely proportional to the raw juice tank level. Load on Mill. The loads on all the mills are not equal. And the load on each mill is set in proportion to the mill roller size and its drives. The load on the last mill (Mill …
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The performance optimization for control loops service is delivered via ABB Ability™ Collaborative Operations for pulp & paper, which connects services that leverage the availability and transparency of data from the Ability platform into a data ecosystem.Data is viewed through a web-based user interface that is easily accessible by customer or ABB …
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The utilization of servo motor control in the servo electric cylinder system allows for precision control of thrust, speed, and position by leveraging the closed-loop control characteristics of ...
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The strip-steering control solution developed by Primetals Technologies in collaboration with its partner thyssenkrupp uses Primetals Technologies' latest vision-based measuring equipment in combination …
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This paper proposes a new width control system composed of an RF (roll force) AWC (automatic width control) in the roughing mill and a FVM (finishing vertical mill) AWC in the finishing mill which aims at obtaining the desirable width margin in the hot strip mill.The RF AWC is designed by the control model on the basis of a gauge meter …
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Fig.9: Practical response curve of the looper hydraulic unit closed loop control force Fig.8: Simplified equivalent model of hydraulic cylinders controlled by servo valves In hot strip finishing mill looper control systems, the closed loop force control is the main variable of the control system used in the looper hydraulic circuit.
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The TelePro/SSE hydraulic mill stand controller performs Level 1 device control of the hydraulic cylinders associated with work roll gap positioning, roll bending, and backup roll balancing in rolling mills. A mill stand state machine manages coordination and sequencing of the individual actuator systems, as well as transitions between operating states.
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traditional control strategies is shown in the simulation results. The interactions between looper control and guage control are also minimized. KEY WORDS: hot strip finishing mill; looper control; automatic gauge control; inverse linear quadratic. 1. Introduction Rolling is one of the most effective processes in metallic materials manufacturing.
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Medium and heavy plates are important strategic materials, which are widely used in many fields, such as large ships, weapons and armor, large bridges, and super high-rise buildings. However, the traditional control technology cannot meet the high-precision control requirements of the roll gap of the thick plate mill, resulting in errors in …
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KEY WORDS: hot strip finishing mill; looper control; automatic gauge control; inverse linear quadratic. 1. Introduction. Rolling is one of the most effective processes in metallic …
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Mill reference Auto loop control Existing control system AC or DC drive systems M M M M M M Revamping a profile mill area by area RM Roughing mill FM Finishing mill RMC Rolling mill control IM Intermediate mill OS Operator station 5 New control room at SKF's Ovako steel mill in Hällefors, Sweden 6
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At the Mizushima Works of Kawasaki Steel Corp. a new control algorithm applying modern control theory has been developed to improve accuracy of strip width and gauge at the hot strip finishing mill. From the control aspect, hot strip mill is a highly representative multi-variable process, including complicated rolling phenomena and …
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The speed reference distribution, automatic loop control, minimum tension control and automatic cutting of flying shears in the mill line are based on precise material tracking.
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We present an automatic procedure for diagnosis of oscillations in control loops in a paper mill. This procedure is one of the features of a "control loop performance monitoring" (CLPM) system under development, and works online without disturbing normal plant operation. When an oscillating control loop is detected, the diagnosis tools allow …
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A Introduction to how a process control loop works. ... An automatic control loop is made up of the following elements: The process: In general, a process can consist of a complex assembly of phenomena that relates …
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The control of the asymmetric shape of strips has always been an important and difficult part of the production of cold rolling strips. In this paper, the S6-High cold rolling mill is taken as the research object. A finite element model of this mill is constructed using ABAQUS 2022 software, and a multistage working condition simulation analysis is …
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The current control loops are subordinated to the speed control loop. The transfer functions of current controllers on d-axis and q-axis, flux controller and speed controller are given. The speed controller uses PI control [13]. The mathematical model of the automatic control system the synchronous motor is realized in Matlab/Simulink …
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Excellent results. In 2016, the strip-steering control system was implemented and tested at thyssenkrupp's Duisburg-based WBW1 plant. Initial tests were performed for common rolled products, subsequent tests targeted special steel grades. Directly after completion of the pilot phase, further tests with approximately 18,000 rolled coils were …
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minimum tension control and automatic cutting of flying shears in the mill line are based on precise material tracking. Signal Source and Reliability Processing The following signal sources are used, depending on different rolling areas: − Hot metal detector (HMD), which is the most commonly used sensor in the mill line. − Loop scanner ...
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The inner control loop is HAPC, and the outer control loop is mill modulus control AGC. ... First, an experiment related to mill modulus control gain in automatic gauge control (AGC) is carried ...
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The correct material tracking is critical for the loop formation and control sequences, especially in high-speed mills. The reduction factor control algorithm is also very important to regulate the …
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Aiming at complex Automatic Flatness Control (AFC) system of Hi-Tech Cold Strip Rolling Mill which equipped with more than four kinds of actuators which participated in closed-loop feedback ...
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ABB's Loop Performance Service identifies and corrects automatic control loop issues to improve control performance and ensure optimum results from a control system investment. The service analyzes and identifies …
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The equipment structure was complex and the precision was low. It was gradually replaced by the hydraulic roll gap control (HGC) system with superior control performance, forming the automatic thickness control system (AGC) of the rolling mill . The general process flow of medium and heavy plate rolling is shown in Figure 1. The …
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