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DE102010013387B4 Control device and method for a rolling

The control device for a rolling mill according to the invention is a control device for a rolling mill with tensioning rollers for feeding and winding a rolling material on the input side and the output side of the rolling mill. The control device comprises for carrying out the control in such a way that the tension between the tensioning roller and the rolling mill

Tension Control Method For A Rolling Mill

Tension Measuring Method and the Effect of Tension Control In hot rolling such as that in a hot strip mill, a section mill or a bar mill, the tandem rolling, in which a slab is rolled at the same time by

US4507946A Method and system for controlling an

In a method and a system for controlling an interstand tension in a continuous rolling mill having a looper provided between a pair of successive rolling stands and driven by a looper drive motor, a

tension control method for a rolling mill

Optimum strip tension control system for rolling mills. Optimum strip tension control system for rolling mills Abstract. A system and method for achieving an optimum interstand strip tension providing substantially equal loading of adjacent stands of a tandem rolling mill where such optimum tension

DE102010013387B4 Control device and method for a rolling

The control device for a rolling mill according to the invention is a control device for a rolling mill with tensioning rollers for feeding and winding a rolling material on the input side and the output side of the rolling mill. The control device comprises for carrying out the control in such a way that the tension between the tensioning roller and the rolling mill is kept at a desired value

Tension Control Method For A Rolling Mill

Tension Measuring Method and the Effect of Tension Control In hot rolling such as that in a hot strip mill, a section mill or a bar mill, the tandem rolling, in which a slab is rolled at the same time by more than two stands, is put into operation mainly for the improvement of productivity, quality and yield.

US4507946A Method and system for controlling an

In a method and a system for controlling an interstand tension in a continuous rolling mill having a looper provided between a pair of successive rolling stands and driven by a looper drive motor, a correction to the speed target value for the looper drive motor is determined in accordance with the deviation of a detected looper operating angle from an angle target value, and the looper drive

US4137742A Interstand tension control method and

1. In a tandem rolling mill consisting of a plurality of rolling stands, an interstand tension control method including the step of computing the interstand tension on the basis of the detected rolling force and rolling torque, and the step of computing the deviation of said computed interstand tension from the desired value and applying an interstand tension control compensating signal

US6227021B1 Control apparatus and method for a hot

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

Looper and tension control in hot rolling mills: A survey

Jul 01, 2007 An observer-based multivariable tension control,was developed to improve tension control accuracy at strip threading time and applied to aluminium hot rolling mills. The approach used control pairings such that the changing rolling speed of the upper stand controls strip tension while torque of a hydraulic looper controls looper angle; this

Rolling Mill Control Russula

Cascade control uses the reduction concept (R-Factor) to calculate the mill cascade speed reference. This parameter, directly related to rolling fundamentals, simplifies the setup and operator control. During production the loop and tension control automatically adjust the R- Factor, ensuring minimum material stress between the stands.

Tension and Thickness Control Strategy Analysis of Two

Third, robust controllers for the rolling mill system's current inside loop are designed based on the cascade control thought, so as to realize the tracking control for the speed and tension of

The development of the theory of metal rolling and its

tensions and rolling speed. The mathematical model also shows which variables most effectively control the thickness and what the relationships are between changes in controlled variables and cor- rection in output sheet thickness. Since the control of the process is the object of the investiga- tion, the controller must be capable of working into conventional

1. Hot rolling and rolling defects: 1.1 Front and back

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,

Control of Strip Tension in a Rolling Mill Based on

hot rolling mills. We thus consider tandem rolling mills equipped with loopers in this paper. Due to their easy setup, PI force controllers are still the most prevalent controllers for the position of looper rolls (Choi et al., 2007b). More advanced control systems use tension meters (Zhao et al., 2008) to measure the current strip tension.

Robust Tension Control of Strip for 5-Stand Tandem Cold Mills

Tandem cold rolling process is a nonlinear complex system with external and internal uncertainties and significant disturbances. The improvement in the quality of the final output depends on the control strategy of centerline thickness and interstand tension. This paper focuses on interstand tension control problem in 5-stand tandem cold rolling mills.

Looper and tension control in hot rolling mills: A survey

Jul 01, 2007 An observer-based multivariable tension control,was developed to improve tension control accuracy at strip threading time and applied to aluminium hot rolling mills. The approach used control pairings such that the changing rolling speed of the upper stand controls strip tension while torque of a hydraulic looper controls looper angle; this

Tension Control Method For A Rolling Mill

Tension Measuring Method and the Effect of Tension Control In hot rolling such as that in a hot strip mill, a section mill or a bar mill, the tandem rolling, in which a slab is rolled at the same time by more than two stands, is put into operation mainly for the improvement of productivity, quality and yield.

A neuro-fuzzy system for looper tension control in rolling

Jan 01, 2005 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).

Looper and tension control in hot rolling mills: A survey

In order to solve the above problems, a state feedback H∞ control method based on a discrete-time model for looper-tension control systems in hot rolling mills is presented.

Tension and Thickness Control Strategy Analysis of Two

Third, robust controllers for the rolling mill system's current inside loop are designed based on the cascade control thought, so as to realize the tracking control for the speed and tension of

Tension and Thickness Control Strategy Analysis of Two

As a result, the entry stand gap can be used as the main control method of exit thickness, whereas rolling speed of any stand and roll gap of the exit stand can be used to adjust the inter-stand tension. The results are beneficial for thickness and tension control of the two stands reversible cold rolling mill.

Understanding Rolling Process in Long Product Rolling Mill

Nov 27, 2015 Data collected at the end of a rolling with used rolls will not be accurate when rolling on new rolls. Tension control. In a continuous mill, speed matching the stand to achieve a constant mass flow through the mill assures a low cobble rate and fewer defects.

FUZZY TENSION CONTROL OF THE WIRE ROD ROUGHING

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 development of the theory of metal rolling and its

tensions and rolling speed. The mathematical model also shows which variables most effectively control the thickness and what the relationships are between changes in controlled variables and cor- rection in output sheet thickness. Since the control of the process is the object of the investiga- tion, the controller must be capable of working into conventional

1. Hot rolling and rolling defects: 1.1 Front and back

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,