roll eccentricity control

roll eccentricity control

Jaw Crusher

As a classic primary crusher with stable performances, Jaw Crusher is widely used to crush metallic and non-metallic ores as well as building aggregates or to make artificial sand.

Input Size: 0-1020mm
Capacity: 45-800TPH

Materials:
Granite, marble, basalt, limestone, quartz, pebble, copper ore, iron ore

Application:
Jaw crusher is widely used in various materials processing of mining &construction industries, such as it is suit for crushing granite, marble, basalt, limestone, quartz, cobble, iron ore, copper ore, and some other mineral &rocks.

Features:
1. Simple structure, easy maintenance;
2. Stable performance, high capacity;
3. Even final particles and high crushing ratio;
4. Adopt advanced manufacturing technique and high-end materials;

Technical Specs

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methods to control eccentricity in forged rolls

A new roll eccentricity control has been developed to improve these disadvantages and to get better performance. The method identifies top and bottom roll eccentricity respectively from one signal of roll force and it can start the control from head end. In this paper the new control method is introduced and actual application results to a hot

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CiteSeerX — ROLL ECCENTRICITY CONTROL WITH THE FORCE .

over an FFF installation requires only about nine (9) months after which time the System is fully operational at the specified gage performance. One of the factors responsible for this high level of gage control is the unique method by which the System deals with the problem of roll stack eccentricity. This paper describes that method.

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Roll eccentricity correction system and method

5/6/1975· A control system and method are disclosed to operate with at least one roll stand of a rolling mill to determine the magnitude and phase relationship of the eccentricity of each back-up roll of a four high roll stand, to monitor the rotation of the back-up rolls during the rolling process, and for each back up roll to correct the roll vertical

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Calender Gauge Control Tips FACTS Inc.

Calender Gauge Control Tips This paper briefly discusses calender control issues that affect the ability to properly control rubber gauge or to produce a consistent rubber sheet. There are two principal sources of variations in Calender Roll Eccentricity Calender rolls must be round and free of run-out at ambient temperature. Any run-out of the

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Oalib search

To realize high accuracy in the strip exit thickness, the Automatic Gauge Control (AGC) system is used. Because of roll eccentricity in backup rolls, the exit thickness deviates periodically. In this paper, we design PI controller in outer loop for the strip exit thickness while PD controller is used in inner loop for the work roll actuator

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ROLL ECCENTRICITY COMPENSATION (REC)

eccentricity compensation. The REC is a fully digital model based control, which uses the fact that the eccentricity of each roll remains relatively constant during rolling to model its shape over several revolutions. Using an inverted plant model this modelled eccentricity is transformed into a compensation setpoint for the gap control (pre

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Strip Thickness Control of Cold Rolling Mill with Roll

In rolling mill, the accuracy and quality of the strip exit thickness are very important factors. To realize high accuracy in the strip exit thickness, the Automatic Gauge Control (AGC) system is used. Because of roll eccentricity in backup rolls, the exit thickness deviates periodically. In this paper, we design PI controller in outer loop for the strip exit thickness while PD controller is

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H∞ Control system for tandem cold mills with roll

This leads to a non-standardH∞ control problem, and the design procedures for solving this problem are analytically presented. The effectiveness of the proposed control method is evaluated through computer simulations and compared to that of the conventional LQ control and feedforward control methods for roll eccentricity.

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Strip Thickness Control of Cold Rolling Mill with Roll

In rolling mill, the accuracy and quality of the strip exit thickness are very important factors. To realize high accuracy in the strip exit thickness, the Automatic Gauge Control (AGC) system is used. Because of roll eccentricity in backup rolls, the exit thickness deviates periodically. In this paper, we design PI controller in outer loop for the strip exit thickness while PD controller is

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how to control eccentricity problem in hot rolling mill

how to control eccentricity problem in hot rolling mill Roll Eccentricity Control for Strip Rolling. An in-depth review of the roll eccentricity control design problem is provided which encompasses a number of recent, novel, design contributions and includes experimental results from two separate steel, tandem cold rolling mill installations

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US3543549A Rolling mill control for compensating for the

An automatic control system as claimed in claim 2 in which at least one of the rolls has associated therewith circuit means to which said further signal is applied and which identifies the component of the further signal which is caused by eccentricity of that roll and controls said means for varying the roll gap of the mill in a sense to

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Roll Eccentricity Compensation-

The roll eccentricity compensator permits a further reduction in the periodic thickness fluctuations caused by the back-up roll eccentricity, especially in the first stand of the tandem mill. The roll eccentricity compensator is a compensation function that .

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Strip Thickness Control of Cold Rolling Mill with Roll

Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network @inproceedings{Hameed2014StripTC, title={Strip Thickness Control of Cold Rolling Mill with Roll Eccentricity Compensation by Using Fuzzy Neural Network}, author={Waleed Ishaq Hameed and Khearia A. Mohamad}, year={2014} }

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(PDF) Application of Repetitive Control to Eccentricity

Repetitive control is applied here to compensate for roll eccentricity disturbances in thickness control of the cold rolling process. A unique aspect of the process is that the eccentricity

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Active compensation of roll eccentricity in rolling mills

The roll eccentricity may be caused by different reasons, like e.g. inexact roll grinding or nonuniform thermal expansion of the rolls. The increasing demands on the thickness tolerances require new methods for the active compensation of the contribution of the roll eccentricity to the final thickness deviation.

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Roll Eccentricity Control Using Identified Eccentricity of

Roll eccentricity is a periodic disturbance caused by a structure of back up rolls in rolling mills, and it affects product thickness accuracy. It cannot be measured directly by sensors, so it should be identified by measured thickness or measured roll force. When there is a large difference of diameters between top and bottom back up roll, the performance of roll eccentricity control using

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Fundamental Study of Roll Eccentricity Control using the

As roll eccentricity control method (elimination method) two types are studied. The first is command method, and the second is feedback method which lessens rolling mill stiffness by a control scheme, for roll eccentricity frequency only. The latter feedback method is proven to have sufficient control ability.

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How to Solve Issues With Calender Gauge Control? Part 1

5/25/2016· How to Solve Issues With Calender Gauge Control? Part 1. May 25, 2016 by Prasanth Warrier 1 Comment. Eccentricity of Calender Roll or Run-out at Ambient Temperature. Your calender rolls must be round and free of run-out at ambient temperature. Any run-out of the individual calender rolls will be amplified as the high spots and low spots

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ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED .

ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED FORWARD AGC SYSTEM System is the only hot strip mill AGC system in the world today which does not incorporate the BISRA principle for gage control. Instead, using a revolutionary control algorithm, FFF has proven in five installations in North and South America, that steelmakers need not replace

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Strip Thickness Control of Cold Rolling Mill with Roll

Figure 3. Effects of roll eccentricity on output strip thick- ness. usually includes its effects. The eccentricity components remaining in the mill exit thickness after compensation. In the model, roll eccentricity modifies Equation (5) as [12]: out. F hS e M =++ (7) where. e is the roll eccentricity. 4. Basic Principle of Fuzzy-Neural Network

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Roll Eccentricity Compensation How is Roll Eccentricity

REC Roll Eccentricity Compensation. Looking for abbreviations of REC? It is Roll Eccentricity Compensation. Roll Eccentricity Compensation listed as REC. Roll Eccentricity Compensation How is Roll Eccentricity Compensation abbreviated? Roll Control Suspension; Roll Control System; Roll Control Wheel Steering; roll crusher; Roll Damn

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CiteSeerX ROLL ECCENTRICITY CONTROL WITH THE FORCE

CiteSeerX ROLL ECCENTRICITY CONTROL WITH THE FORCE. CiteSeerX Document Details Isaac Councill Lee Giles Pradeep Teregowda The Force Feed Forward FFF System is the only hot strip mill AGC system in the world today which does not incorporate the BISRA principle for gage control Instead using a revolutionary control algorithm FFF has proven in five installations in North and South America that

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Roll Eccentricity Control Based on Recursive Estimation

Not Available adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

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Control System Design Simulations

To estimate roll eccentricity, we view the output of the BISRA gauge (which is h + e) as the eccentricity e plus some noise. Before we can use an observer to estimate the roll eccentricity, we need to model it. As before, this model is chosen to be a single sinewave of period 200ms.

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JPS586718A Controller for eccentricity of roll Google

PURPOSE:To exercise stable, high-precision control over removal of roll eccentricity, by preventing discontinance of data on the extent of roll eccentricity even when the difference in rotational angle between an upper and a lower backup roll varies during rolling operation. CONSTITUTION:In a compensating device 12 for the extent of roll eccentricity, upper and lower backup rolls 3a and 3b

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Gauge control using estimate of roll eccentricity

9/16/1980· The estimating of gauge and eccentricity, using control means associated with the mill, as described in detail hereinafter, is a continuing process until the cyclic component in exit gauge variations is reduced to a minimum or zero amount and the estimate of eccentricity reaches a steady state value representing the true eccentricity of the rolls.

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Roll Eccentricity Control for Strip Rolling Mills

An in-depth review of the roll eccentricity control design problem is provided which encompasses a number of recent, novel, design contributions and includes experimental results from two separate steel, tandem cold rolling mill installations.

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Hot Rolling Mill Hydraulic Gap Control (HGC) thickness

Hot Rolling Mill Hydraulic Gap Control (HGC) thickness control improvement Peter Kucsera*, Zsolt Béres Lock-on gauge control Work roll thermal expansion compensation Work roll bending Tapering Roll eccentricity compensation Thickness feedback control Predictive and adaptive control methods Due to the given application and requirements

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Advanced algorithm and experiment of roll eccentricity control

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Paper Roll Eccentricity Inspection Procemex

Eccentricity measures how well the core is centered in the roll. If the core center is off from the roll center by more than a few millimeters, the roll may cause damage or create a safety hazard when unwound at the customer site.

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