hot rolling mill roll eccentricity

  • ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED .

    ROLL ECCENTRICITY CONTROL WITH THE FORCE FEED FORWARD AGC SYSTEM Francis Wagner, Manager Rolling Mill Automation Hatch Associates Consultants, Inc., Buffalo, NY, USA ABSTRACT: 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.

  • Non-circular grinding of backup rolls to reduce rolling ...

    non-circular shape was ground on the rolls. The empirical research took place at a hot strip mill. As a result, the 3D ground non-circular geometry of the backup rolls considerably reduced the rolling force variation. Key words: non-circular grinding, rolling mill, backup roll, rolling force variation. 1. INTRODUCTION

  • Neural network for identification of roll .

    The roll eccentricity in a rolling mill may define the limit of achievable thickness tolerances and thus is subject of interest for the automation equipment in hot rolling mills as well as in cold rolling mills. Today's demand on thickness tolerances less than 0.8% require efficient methods for roll eccentricity identification and compensation.

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  • hot rolling mill roll eccentricity

    Hot Rolling Mill Roll Eccentricity. Hot Rolling Mill Roll Eccentricity Ethiopia sea salt washing machine supplier list of countries by salt production this is a list of countries by salt production the four leading salt producers in the world india the united states ethiopia 100000 004 61 new get price salt machine manufacturers amp suppliers

  • Hot Rolling Mill Hydraulic Gap Control (HGC) thickness ...

    Schematic structure of a hot rolling mill The thickness of the rolled material is measured by an X-Ray thickness gauge in the last pass. This measurement is possible within several meters distance from the roll gap, therefore considerable dead time has to be taken into account in thickness control.

  • US3543549A - Rolling mill control for .

    Method and apparatus for controlling eccentricity of rolls in rolling mill EP0015866A1 (en) * 1979-02-28: 1980-09-17: Mitsubishi Jukogyo Kabushiki Kaisha: Method of controlling roll eccentricity of rolling mill and apparatus for performing the same method WO1985000998A1 (en) * 1983-09-08: 1985-03-14

  • Strip Thickness Control of Cold Rolling Mill with Roll ...

    have been widely utilized in steel rolling mills [3]. Strip products thickness precision is an important quality parameter. But the export thickness appears as the periodical fluctuation in the practical production because of the roll eccentricity thermal expansion of rolls and the . fluctuation of the entrance thickness and material stiff-ness.

  • HKU Scholars Hub: A roll eccentricity sensor for .

    The problem of roll eccentricity compensation in steel-strip rolling mills is examined. A novel roll eccentricity sensor is proposed for the task of retrieving the desired reference signal from the available roll-force measurement. The sensor implements a modified comb filter structure which can be arranged in either tunable or adaptive form. Simulation results based on typical experimental ...

  • Rolling (metalworking) - Wikipedia

    These backup rolls are larger and contact the back side of the smaller rolls. A four-high mill has four rolls, two small and two large. A cluster mill has more than 4 rolls, usually in three tiers. These types of mills are commonly used to hot roll wide plates, most cold rolling applications, and to roll foils.

  • Online Eccentricity Monitoring Weihong Guo of Seamless ...

    Online Eccentricity Monitoring of Seamless Tubes in Cross-Roll Piercing Mill Wall-thickness eccentricity is a major dimensional deviation problem in seamless steel tube production. Although eccentricity is mainly caused by abnormal process conditions in the cross-roll piercing mill, most seamless tube plants lack the monitoring at the hot

  • Cold Rolling Mill Rolls Manufacturer,Hot .

    Our Precis. Founded in the year 2011, we, Bajrang Tools And Rolls Pvt. Ltd., are a distinguished Manufacturer, Supplier and Exporter of a broad range of Cold Rolling Mill Rolls and Hot Rolling Mill Rolls used in mills. These products are widely used in the metal forming industry owing to their robust design, outstanding performance and minimal maintenance.

  • Loop monitoring and assessment of hot strip mill control

    1.4 Hot strip mills The objective in a hot strip mill (HSM) is to roll thick slabs into thin strips. Slabs are ingots of alloy metal that are produced in a continuous casting plant. The slabs rolled in Avesta have been manufactured in Tornio (Finland), Sheffield (Great Britain) and Avesta. They have a length of up to 11 meter, a thickness ...

  • Active compensation of roll eccentricity in .

    Abstract: This paper is concerned with the active compensation of the roll eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rolling mills. The roll eccentricity may be caused by different reasons, like e.g. inexact roll grinding or nonuniform thermal expansion of the rolls.

  • Roll Eccentricity Phase Identification System | .

    Roll eccentricity is widespread in the strip mill, has cyclical impact on strip thickness, so disturbance compensation is required to improve the product quality. The key step of disturbance compensation is to obtain reliable roll eccentricity signal. Existing direct measurements of roll eccentricity signal method requires special equipments with high precision but not practical enough.

  • Strip Thickness Control of Cold Rolling Mill with .

    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.

  • Roll Eccentricity Phase Identification System | .

    Roll eccentricity signal is difficult to directly measured, should fuse many kinds of detectable signal to be extracted through the data analysis which includes rolling force, roll gap, incoming thickness of rolled piece, exit thickness, tension, and so on. This paper puts the four high mill as an object, according to the influence of the main factors of roll eccentricity ——backup-roll ...

  • hot rolling mill roll eccentricity - BINQ Mining

    hot rolling mill roll eccentricity – Grinding Mill China. Active compensation of roll eccentricity in rolling mills Abstract. This paper is concerned with the active compensation of the roll-eccentricity-induced periodic . »More detailed

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  • hot rolling mill roll eccentricity - Pochiraju .

    Neural network for identification of roll eccentricity in rolling mills. Feb 16, 1999 ... The roll eccentricity in a rolling mill may define the limit of ... thus is subject of interest for the automation equipment in hot rolling mills as well as...

  • hot rolling mill roll eccentricity - Pochiraju .

    Neural network for identification of roll eccentricity in rolling mills. Feb 16, 1999 ... The roll eccentricity in a rolling mill may define the limit of ... thus is subject of interest for the automation equipment in hot rolling mills as well as...

  • Hot Rolling Mill Hydraulic Gap Control (HGC) thickness ...

    The hot rolled strip is later processed by a cold rolling mill, and to facilitate the threading operation, tapering is applied. Tapering is activated by a sensor which is located at a given distance from the mill stand on the rolling table at the entry side, and gives a signal when the strip end is in a given distance.

  • Hot Rolling | Nippon Yakin

    This rolling mill is a Steckel type of reversing finishing mill capable of producing hot strips with superior thickness precision, surface quality and internal quality. This mill can roll not only stainless steels but also heat resistant alloys and steels or other high alloyed corrosion resistant alloys. The manufacture of high performance alloys encompasses a great deal of expertise such as ...

  • [PDF] Online Eccentricity Monitoring of Seamless .

    Wall-thickness eccentricity is a major dimensional deviation problem in seamless steel tube production. Although eccentricity is mainly caused by abnormal process conditions in the cross-roll piercing mill, most seamless tube plants lack the monitoring at the hot piercing stage but only inspect the quality of finished tubes using ultrasonic testing (UT) at the end of all manufacturing processes.

  • Active compensation of roll eccentricity in .

    Abstract: This paper is concerned with the active compensation of the roll eccentricity-induced periodic disturbances in the strip exit thickness of hot and cold rolling mills. The roll eccentricity may be caused by different reasons, like e.g. inexact roll grinding or nonuniform thermal expansion of the rolls.

  • Strip Thickness Control of Cold Rolling Mill with .

    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 ...

  • US3543549A - Rolling mill control for .

    Method and apparatus for controlling eccentricity of rolls in rolling mill EP0015866A1 (en) * 1979-02-28: 1980-09-17: Mitsubishi Jukogyo Kabushiki Kaisha: Method of controlling roll eccentricity of rolling mill and apparatus for performing the same method WO1985000998A1 (en) * 1983-09-08: 1985-03-14

  • Neural network for identification of roll .

    The roll eccentricity in a rolling mill may define the limit of achievable thickness tolerances and thus is subject of interest for the automation equipment in hot rolling mills as well as in cold rolling mills. Today's demand on thickness tolerances less than 0.8% require efficient methods for roll eccentricity identification and compensation.

  • Strip Thickness Control of Cold Rolling Mill with .

    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 ...

  • Strip Thickness Control of Cold Rolling Mill with .

    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.

  • Upgrading of Hot Finishing Mill to 4-Stands, and ...

    hot-rolled coils, thereby effecting pass cutting in the cold-rolling process. 3) To realize a high-productivity hot-rolling mill by replac-ing the computer control system with one of the latest design that achieved a significant degree of automa-tion. The expansion of the hot finisher to 4 stands, which was

  • Hot rolling mill - Industry solutions by Herkules

    Hot rolling mill. Grinding quality on the next level. When producing hot strip, all production stages must perform according to the highest standards and run in a perfectly synchronized way. One of the keys in the production process is the roll machining. If faulty rolls are in operation, they cause deviations from the profile and surface flaws on the hot strip, which directly impair the ...

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