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#0183;#32;Typically, the number of backup roll cycles is as shown in Table I. TABLE 1 TYPICAL BACKUP ROLL CYCLES FOR DIFFERENT MILL TYPES MILL TYPE srAND PRODUCT NUMBER OF THICKNESS BACKUP ROLL (mm) CYCLES/PRODUCT Tandem cold mill First 100400 Tandem hot mill First 1025 Last 50200 Plate mill Last 16 A review of previously proposed solutions to the eccentricity
Hot Rolling Mill Roll Eccentricity. Abstract This paper is concerned with the active compensation of the roll eccentricityinduced periodic disturbances in the strip exit thickness of hot and cold rolling mills. The roll eccentricity may be caused by different reasons, like inexact roll grinding or nonuniform thermal expansion of the rolls.
#0183;#32;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 % require efficient methods for roll eccentricity identification and compensation.
how to ntrol eccentricity problem in hot rolling mill. If you want to learn about our products, please call or write mail consultation. key feature of process control detection of periodic defects rolls and rollers are the most heavily used parts of a rolling mill due to wear from contacting hot material with great force, their lifetime is limited although rolls are refurbished in the roll
Rolls in rolling mills are never completely round but have eccentricity which can be caused by: grinding inaccuracy nonuniform thermal expansion asymmetrical adjustment of bearing rolls shell via drive keys Each eccentricity consists of a base frequency which is the rotary frequency of the roll and several harmonic frequencies.
The key equipme nt in hot/cold tand em rolling mills is the nishing mill g roup, which usually consists o f 7 mill stands in hot rolling and 5 mill stands in cold rolling.
an offline eccentricity identification method which is performed when there is no plate rolling through the mill and with the top work roll and the bottom work roll in tight contact, said offline eccentricity identification method determining the eccentricity values of N first points which equally divide a circumference of the top backup roll and N second points which equally divide a
Response time is sufficient to compensate for any roll eccentricity on backup or work rolls. To avoid excess rolling emulsion being carried through the mill on reversing the strip a window type design has been adopted for the stand with splash curtains and an air jet seals the exit gap to prevent nebulised emulsion reaching the strip.
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...
2 Rolling mill stand unit design 1 Rolling force variation consists of changes of a rolling force level, b rolling force uctuation and c drop of rolling force once in backup roll revolution Widmaier et al. Reducing thickness variation of hot rolled steel strip 134
hot rolling mill roll eccentricity; Roll Eccentricity Control for Strip Rolling Mills. #183; Typically, the number of backup roll cycles is as shown in Table I. TABLE 1 TYPICAL BACKUP ROLL CYCLES FOR DIFFERENT MILL TYPES MILL TYPE srAND PRODUCT NUMBER OF THICKNESS BACKUP ROLL (mm) CYCLES/PRODUCT Tandem cold mill First 100400 Tandem hot mill First 1025
Home / rollcrusher/ hot rolling mill roll eccentricity Typically the number of backup roll cycles is as shown in Table I TABLE 1 TYPICAL BACKUP ROLL CYCLES FOR DIFFERENT MILL TYPES MILL TYPE srAND PRODUCT NUMBER OF THICKNESS BACKUP ROLL mm CYCLESPRODUCT Tandem cold mill First 03 100400 Tandem hot mill First 25 1025 Last 25 50200 Plate mill Last 100 16 A
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