The rolling process requires considerable amounts of energy. High horsepower motors turn the rolls, and highpressure hydraulic systems control the rolls and other mill equipment. Rolling fluids on steel mills include water, wateroil emulsions, waterglycol solutions and petroleumbased products.
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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 ...
The experimental application on the 1580 R2 rough rolling mill shows that spray pressure of M P a and the nozzle diameter of mm are appropriate to generating the proper water ... Research on Spray Dust Removal and Control System of Hot Rolling Mill [D] The Thesis of the Master Degree at University of Science and Technology Liaoning ...
A Simulink and mathematical models have been proposed in this study in order to control the thickness in a rolling mill process. The simulation results show that the thickness oscillation can be manipulated with high accuracy by using NARMAL2, since it can remove the nonlinearity of servo system and other disturbances complexities. The proposed NARMAL2 controller model has been compared ...
The three rolling mills are suitable for stainless steel cold rolling, and have advantages and disadvantages in mechanical equipment maintenance, thickness control, plate shape control and so on ...
The ITC system consists of separate control modes for initial mill threading and steadystate rolling. The threading control mode is configured specifically to establish interstand tension during initial threading. The steadystate or run control mode is configured to reduce interactions between interstand tension and strip thickness.
A continuous quality control of material and surface during the rolling process is a part of these tasks and is associated with providing the full automation of rolling mills.
An adaptive command filter control strategy was proposed to realize the asymptotic tracking of the roll speed, which successfully suppressed torsional vibration for the main drive system of the rolling mill with nonlinear friction, nonlinear damping, current harmonic, timevarying stiffness and unknown disturbance. A finite time predetermined performance method was proposed, so that the speed ...
Speed monitoring. The results achieved in this development encourages the next step, installing several cameras at the facilities, and communicating the software with the rolling mill control. Coils counting. The improvement of the algorithm will be focused on distinguishing the temperature variations in a more accurate way, considering that
Mill modulus control (MMC) is one of important methods in AGC system for strip rolling mills. Control theories and models related to MMC were studied deeply in this paper. Its ability to eliminate ...
![Rolling Mills: 6 Different Types of Rolling Mills [Images PDF]](/ma8wnjr/362.jpg)
In the rolling process, the job is drawn through a set of rolls due to interface friction, and the compressive forces reduce the thickness of the workpiece or change its crosssectional area.. The types of rolls used in rolling mills are depended upon the shape, size, and the gap between the rolls and their contour. Because of workability and limitations in equipment, rolling is done in the ...
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According to an embodiment of the present invention, an apparatus for controlling a rolling mill using artificial intelligence (AI) can comprise: an AI controller outputting a control value for operating a rolling mill by calculating the control value by using AI based on input information, and outputting a final control value by resetting the control value for a shape of a steel sheet fed ...
If the mill rolls 800,000 tons per year, it runs at an average production rate of tons/hour. If the utilization can be improved by 1 %, the available rolling hours is 365 x 24 x =, creating extra rolling hours. At tons/hour that is an additional 10,000 tons can be rolled.
We have proven results for setting exceptional standards in cost control, planning, scheduling and project safety. Contact us at or email sales for assistance. Rolling mills are a system of machines for deforming metal into rotary rolls and performing auxiliary operations such transportation of stock to rolls.
It can be seen in the simulation response curves in Figure 15, Figure 16 and Figure 17 and Table 2 of the parameters of the three strategies, that in the semiphysical simulation of the rolling mill hydraulic roll gap control system, compared with the ZN algorithm, the maximum overshoot of the PSO algorithm and the LMPSO algorithm were reduced ...
Automated gauge control (AGC) system has taken a wide area of the recent studies that deals with hot and cold rolling mill. These studies had concentrated to improve the mill stretch design and ...
Process expert system. Data from new sensors is only useful when it can be analyzed to adapt mill processes. Meeting today's demands for flexible and economic production of long products requires production process, electrical, and automation solutions that are based on precise process modeling, highperformance control systems, and an indepth understanding of longrolling technology.
For one 5 000 mm heavy plate mill, the automation control system was modified, and the angular rolling technology was applied online. The absolute deviation of target width does not exceed ± 20 mm and the relative deviation does not exceed 1%. ... The experimental rolling mill is a φ 450 mm hot rolling mill in Northeast University, with 450 ...
To ensure that the quality of rolled products and technical and economic indicators are optimized. The rolling process of the entire Steel Rebar Rolling Mill Process Flow generally consists of one row (group) or two rows (group) of rough rolling mills, intermediate rolling mills, and finishing rolling mills. Respectively undertake the functions ...
The stateoftheart of both technology and operational practice of a hot rolling mill are discussed. The focus is first on the control of entry temperature in the finish mill. Transfer bar ...
Qian et al. studied the adaptive fuzzy control problem of a rolling mill vibration system and designed a controller to ensure the stability of the mechanical, hydraulic coupling rolling system . In summary, although some advances have been made in the behavior analysis of the coupled vibration of rolling mills, the complex vibration law of the ...
103 P. Kucsera et al. Hot Rolling Mill HGC Thickness Control Improvement Predictive Controller In the case of rolling mills, predictive control is an option, to achieve improved performance. This is because the deadtime can be calculated from the available speed measurements.
Rolling Mill Type Selection. The shape control capability of a particular type of rolling mill exerts a decisive effect on strip quality. According to product positioning, analyzing and comparing the control performances of various rolling mill types, and selecting the appropriate rolling mill type are an essential task for newly built and ...
the gage of the strip. If the mill has more than one stand, the strip is threaded through each one and is finally coiled on a rewind reel similar to the unwind reel. Tension in the strip can be approximately controlled by many methods, On single stand mills, the most common approach is to control
TwoHigh: Generally, a 2HI mill is used for hot or cold breakdown and finishing of bar, sheet or strip. A wide range of sizes with separating force capacities from 10,000 lbs. ( MT) to over 3,000,000 lbs. (1360 MT) are available. ThreeHigh: A 3HI mill is an economic milling solution for the breakdown of rod and ingot. FourHigh: A 4HI mill may be used for finish rolling of thin gauge ...
In the tandem cold rolling mill, the control logic which is applied to the two stand cold reversing mill is further extended in order to take into account the contribution of more stands (Fig 3) and the corresponding availability of sensors. A typical tandem cold rolling mill installation is provided with the sensors such as (i) thickness xray ...
mainstream of computer control system for rolling mill which is a typical complex electromechanical system [1, 2]. Automatic Gauge Control (AGC) system is installed in the fourhigh plate mill, and it is the most important mechanism for dynamic thickness control in conventional rolling mills.
October 1998. A. Balestrino. Alberto Landi. Luca Sani. This paper deals with the application of advanced control techniques to improve the product quality in hot rolling mills. Performance ...
now that new control packages such as the Profile Mill IDC are available . Ovako steel mill revamp A typical example of a successful revamp carried out in stages is the bar and rod 5 mill at SKF 's Ovako steel mill in H ällefors, Sweden. This rolling mill, commissioned in 1977, was one of the world's first digitally controlled mills and ...
The rolling mill is equipped with a slab reheat furnace, followed by an edger for width control before a single roughing mill stand. The predeformed strip is then descaled and is transported into 6 stands of 4high rolling mill for stepwise thickness reduction, and finally enters cooling water wall and coilers.
The mill stretch compensation and other disturbances during the rolling process are compensated and a rolling speed dependent, adaptive PI controller is developed to accomplish fine thickness control.
In rolling mills, the mass flow control always requires a combined thickness measurement and velocity measurement. Mass flow Automatic Gauge Control (AGC) is a technique used for many years to control strip thickness in tandem cold rolling mills, enabling tighter control of thickness by providing faster and more accurate control of the roll gap
In response to this problem, this paper takes the 5500 mm thick plate production line as the research background, and establishes the model of the rolling mill plate thickness automatic control system, using the ZieglerNichol response curve method (ZN), particle swarm optimization (PSO) algorithm and linear weight particle swarm optimization (...
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