WhatsApp)
The problem of roll eccentricity has become one of important factors to affect the quality of strips as downstream industries require improvement of the strip quality. casting there is a strong trend to continuous hot rolling mills and also final strip by the system optimize gauge and roll eccentricity control and simplify mill leveling.
cooling system. Problems of this kind can never really be calculated but they have a detrimental effect on all rolling schedules including stresses in the roll. As regards abnormal rolling conditions which are more or less very normal for rolling mills roll damage often occurs with consequences for the mill and the rolled product.
Roll eccentricity elimination control PC1: Rougher master, table master PC2: Rougher submachine control master PC3: Machines around rougher mill control master, Automatic gauge control PC4: Slab cooling temperature control Figure 2 Configuration of computer control system for hot strip rolling mill Roll thermal crown calculation Finisher setup
above control systems, a desired elongation is realized by controlling the rolling force of the mill by a hydraulic screwdown control system. AEC for skin pass mill of continuous processing line Conventional AEC methods and their problems In most cases, an inline skin pass mill
Eccentricity in Rolling Mills Xu Yang, Member, IEEE, THE hot/cold rolling process is a high speed, and roll eccentricity problem is the
ing mill are used. Slabs are rolled roughly in the roughing mill because they are hard to be rolled to a required thickness at one time. And then the strip passes through the nishing mill. At this time, an Automatic Gauge Control(AGC) system plays an important role in making an accurate sized hot
#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 control problem
#0183;#32;Rolling mill eccentricity compensation using measurement of sheet tension: : Stewart et al. 72/8: : Rolling mill eccentricity compensation using actual measurement of exit sheet thickness: : Oliver et al. 72/8: : Roll eccentricity control system for a rolling apparatus: : Yamaguti et al. 72/8:
Hot rolling mill roll eccentricity. methods to control eccentricity in forged rolls Roll eccentricity is a periodic disturbance caused by a structure of back up rolls in rolling mills The Complete Technology Book on Hot Rolling of Steel Author NIIR Board of Consultants Engineers Format Paperback then the process is termed as hot rolling The hot mills using plain rolls were.
#0183;#32;A method and apparatus is disclosed for eccentricity correction in a rolling mill, in which prior to rolling, the eccentricity of the backup rolls is measured and recorded both initially and each time the backup rolls are changed.
An indepth 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.
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 shop regularly, they occasionally crack before the end of the usual production cycle.
WhatsApp)