tension control control method tension rolling 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 makes no representation as to the accuracy of the status listed.) Expired Lifetime Application number US05/892,180 Other languages English (en ...
WhatsApp: +86 18203695377
From the series: Simulating a MultiStage Rolling Mill Process. This webinar is the third in a threepart series that highlights the use of MathWorks products for modeling and control of a multistage rolling mill process. In this webinar, you will learn how to design PID controllers for managing tension in a multistage rolling mill process.
WhatsApp: +86 18203695377
A looper tension control system is common to many rolling processes. Conventional tension controllers for mill actuation systems are based on a rolling model. They therefore cannot deal effectively with unmodeled dynamics and large parameter variations that can lead to scrap runs and machinery damage. In this paper, this problem is tackled by ...
WhatsApp: +86 18203695377
In order to solve the above problems, a state feedback H∞ control method based on a discretetime model for loopertension control systems in hot rolling mills is presented.
WhatsApp: +86 18203695377
A survey of tension control methods for rolling mills can be found in [5]. However, tension control in rolling mills is not directly comparable to tension control in slitting lines, since rolling ...
WhatsApp: +86 18203695377
The invention relates to a tension control method for a rolling stock section (5) of a rolling stock (1) located between a front and a rear rolling stand (2, 3) of a rolling mill. In order to enable reliable tension control even with small stand spacings and high rolling speeds, it is provided that a clamping element (6) is set against the rolling stock section (5) with an actual contact force ...
WhatsApp: +86 18203695377
The rolling force, rolling torque, incoming workpiece thickness and roll gap at a first rolling stand are detected when a workpiece is fed into the nip between the rolls of the first rolling stand to provide their reference values P 10, G 10, H 10 and S 10 which are stored in a memory, and the reference torque arm l 10 is computed on the basis of the reference values G 10 and P 10 of rolling ...
WhatsApp: +86 18203695377
PURPOSE: To exactly control the interstand tension, by finding the tension value between the two stands from the tension value detected when the rolled material is gripped in the first stand and the tension value detected when the rolled material is gripped in the next stand, and by controlling the rolling speed depending on the deviation of the above mentioned interstand tension value from ...
WhatsApp: +86 18203695377
Tandem cold rolling is a highspeed, highefficiency, and complex production process. In some cases, minor interference or disoperation may result in large economic losses. To improve control performance and enhance system robustness, an optimal tension and thickness control method is presented in this paper.
WhatsApp: +86 18203695377
By setting the fluctuation range of rolling tension, the control criterion to the drive system axis was obtained. Furthermore, the correctness of the theoretical analysis was verified through the engineering test of a 1780mm hot strip mill. ... Development of high performance rolling mill drive system using PID control method. Tran Sice Jpn ...
WhatsApp: +86 18203695377
A control apparatus for a hot rolling mill having a plurality of rolling stands, including a roll gap tension controller configured to control a roll gap of one of the rolling stands so that a detected interstand tension value of a rolled material positioned between the adjacent rolling stands accords with a target interstand tension value thereof ; and a tension width controller configured to ...
WhatsApp: +86 18203695377
Hot strip rolling mills are characterised by a process which has many interactions, is distributed with dominant transport delays and has a lack of measurements due to the severe environment. ... T. Kataoka, H. Sasao and K. Yabuuchi, "A New Tension Control Method for Hot Strip Finishing Mill", IFAC 10th Triennial World Congress, pp. 114 ...
WhatsApp: +86 18203695377
When the shear is cutting the trailing end of the workpiece, a backward tension is produced between the shear and the first rolling stand of the tandem rolling mill, resulting in abrupt variations of the process data used for the computation of the interstand tension.
WhatsApp: +86 18203695377
August 2429, 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 2729, 1040 Vienna, Austria (email: ) Abstract: A mathematical model of a striplooper ...
WhatsApp: +86 18203695377
For the speed and tension system of the reversible cold strip rolling mill with output constraints, parameter perturbations and load disturbance, a fixed‐time prescribed performance optimization ...
WhatsApp: +86 18203695377
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 uncertainty that present a difficult control challenge. Loopers are placed between finishing mill stands not only to control the mass flow of the two stands but also to generate a constant specific ...
WhatsApp: +86 18203695377
The control problem of the hotsteel rolling mill is thus formulated in two levels: (i) from to one computes the control inputs and that should be applied to the hotsteel roll mill system so as to assure that the angle of the looper and the tension on the strip will reach the desirable setpoints, (ii) the control inputs and become setpoints ...
WhatsApp: +86 18203695377
PROBLEM TO BE SOLVED: To provide a tension control method for a tandem hot rolling mill which can perform appropriate tension control even on a thick material such as one to be roughrolled, when a steel sheet is rolled by the tandem hot rolling mill. SOLUTION: In the method, the roll rotation speed on R4 rolling stand 12 is adjusted so that a ...
WhatsApp: +86 18203695377
USA Control method of tension in rolling mills (1) Google Patents Control method of tension in rolling mills (1) Download PDF Info Publication number ... rolling process Methods title claims description 114; corresponding Effects claims description 58;
WhatsApp: +86 18203695377
Optimum strip tension control system for rolling mills USB1 (en) * : : Kabushiki Kaisha Toshiba: Strip threading speed controlling apparatus for tandem rolling mill ... Gauge control method and system for rolling mill USA (en) * : : , Ltd. Gauge and tension control system for tandem ...
WhatsApp: +86 18203695377
The control by which a tension is generated on the material to be rolled on the entry side and the exit side of the rolling mill 1 and the control of the roll gap of the rolling mill are exerted in an appropriate manner, thereby suppressing the vibration of the rolling mill exit thickness. A transferring speed of the material to be rolled is controlled by: controlling a transferring speed of ...
WhatsApp: +86 18203695377
The shape control method of a rolling mill is desired. In the tandem rolling mill, the shape of the strip at the end of the final stand is. (a) The change of the profile of the cross section of the rolling material by the entrance side of a 1st stand by changes, such as a charging slab or a coil. (b) Change in roll spacing of each stand due to ...
WhatsApp: +86 18203695377
The plant model is a rolling mill that uses a looper for tension control (Fig. 1). 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).
WhatsApp: +86 18203695377
In the control of the tension of a workpiece which is rolled by a tandem rolling mill, a tension control method for a rolling mill wherein the tension of a workpiece is controlled by a looperless tension control method employing no looper at the threading stage of the top end and at the tailout stage, and it is controlled by a tension control method employing a looper during the steady rolling.
WhatsApp: +86 18203695377
The invention discloses a tension detection and control method for a highspeed wire rod rolling mill, which is characterized by comprising the following steps of: s1, mounting a first laser rotation speed sensor and a second laser rotation speed sensor at the rotating rollers of the first rolling mill and the second rolling mill; s2, monitoring the rotating speed of the rotating roller ...
WhatsApp: +86 18203695377
The invention provides a control method and a control device for racks of a tandem cold rolling mill. The method comprises the following steps: setting a load born by a fault rack as an initial value according to a virtual dummy signal of the fault rack; adjusting a tension value according to tension control grain coefficients, ensuring that the tension value is output to each standby rack in ...
WhatsApp: +86 18203695377
In the control of the tension of a workpiece which is rolled by a tandem rolling mill, a tension control method for a rolling mill wherein the tension of a workpiece is controlled by a looperless tension control method employing no looper at the threading stage of the top end and at the tailout stage, and it is controlled by a tension control method employing a looper during the steady rolling.
WhatsApp: +86 18203695377
The problem of achieving minimum bar tension in a merchant bar rolling mill without direct tension measurement is considered. A nonlinear statespace 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 feedback to provide appropriate control action.
WhatsApp: +86 18203695377
These results were nevertheless very encouraging for the authors of this article to use fuzzy logic to deal with the extreme complexity of the looperless tension control. 3. Fuzzy control scheme In general, the rolling force at each stand varies with change of strip temperature, roll eccentricity, and many other factors.
WhatsApp: +86 18203695377
PURPOSE:To improve the control accuracy of tension between stands by a tension estimation equation by accurately finding the influence coefficient of the tension included in the tension estimation equation. CONSTITUTION:In the tension control method of a continuous rolling mill which controls by estimating the tension between an ith stand and an (i+1)th stand by using the tension estimation ...
WhatsApp: +86 18203695377
The state key Laboratory of Rolling technology and Automation of Northeastern University (NEURAL) designed and manufactured a new pilot warm rolling mill that can achieve heating on line in the ...
WhatsApp: +86 18203695377
Equations are derived for the normal roll pressure, specific roll load and torque in hot rolling mills, using the condition for plastic deformation in rolling derived by Orowan, together with von Kármán's equation of equilibrium. Although applying strictly to the rolling of ideal plasticrigid materials, these equations may be applied to the ...
WhatsApp: +86 18203695377
Looper and tension control, shown in Fig. 2, is important in hot strip mills because they affect both the dimensional quality and the mass flow of a strip. The high strip tension between stands induces width shrinkage, thickness reduction and moreover can produce an edge wave on a strip. However, it does make the mass flow more stable and hence ...
WhatsApp: +86 18203695377
A tension control method for a rolling stock section located between a front roll stand and a rear roll stand of a rolling train, wherein a tensioning element with an actual adjusting force is adjusted relative to the rolling stock section, so that the rolling stock section is deflected by the tensioning element by an actual deflection; the actual adjusting force and the actual deflection are ...
WhatsApp: +86 18203695377
يرغب أحد موردي المواد من بلجيكا في إنتاج مسحوق الحجر الجيري لملابسه...
الهند غنية بالموارد المعدنية المختلفة وهي سوق مهم لمعالجة المعادن
Copyright © 2023 GMC Co., Ltd. SiteMap
