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1、（M-H Split housing type 20 High Sendzimir Mill）HZHZ- -MILL for Silicon SteelMILL for Silicon SteelJanuary, 2008Double AsDouble As- -UU2Double AsDouble As- -UU NIPPON STEEL1300mm WidthFor Special Steel2001 Start up YAWATA HITACH CABLE700mm WidthFor Copper2001 Start up Some Company1300mm WidthFor Sili
2、con Steel2006 Start upKorea BAOSHAN NO.11300mm WidthFor Silicon Steel2008 Start up IRON 1250mm SUS 304High Speed RollingLarge Rolling Load Deviation at Acc.1.881.73mmAccelerationDecelerationAccelerationDecelerationNeuro/Fuzzy ControlHigh Performance ASCFeature of High Speed Silicon Steel Rolling7Con
3、struction of Single ASU-SystemSingle AS-USingle AS-U8Construction of Double ASU-SystemDouble AS-UDouble AS-U9a) Conventional single As-U systemP1=20.41P (1)Where, P; Rolling load1 ; Displacement of work roll when B and C backing bearing shafts are moved by in screw-down direction.b) Double AS-U syst
4、emP2=2 (0.41P+ 0.56P) (2)Where, P ; Rolling load2 ; Displacement of work roll when A,B,C and D backing bearingshafts are moved by in screw-down direction.c) Comparison of Double AS-U with conventional singleAS-U systemA0.56PB0.41P C0.41P0.56P D001 Pa) Single AS-U system (conventional ZR-mill)A0.56PB
5、0.41P C0.41P0.56P D2 Pb) Double AS-UStrip shape controllability of Double AS-U systemStrip shape controllability of Double AS-U system is:2/1 = 2.4 times In case of ZR22BN,ZR21ANDouble AS-U Effect (1/2)10-100-50050100150200-100-50050100150200ABC DABC DComparison of strip shape controllability (calcu
6、lated)b) KZR-MILL (double AS-U)a) Convention ZR mill (single AS-U)Double AS-U Effect+5 scale Upper Limit-5 scale Lower Limit(I-unit)242 I-unitMill Type: ZR22BN-51 Work roll dia.: 59mm Strip width: 1,250mm Rolling load: 4,685kN Product strip gauge: 0.5650.5mmStrip crown control capability of Double A
7、S-U is 2.8 timesas high as conventional single AS-U system (=242/88)WidthWidth(I-unit)88 I-unit111st IMR ABCDAB CD Double AS-UConventional single AS-UDouble AS-U Effect for High Speed Rolling (Calculation)Mill Type: ZR22BN-51 Work roll dia.: 59mm Strip width: 1,250mm Strip: SUS304 Product strip gaug
8、e: 0.5650.5mm30m/min(=0.1)800m/min(=0.036)800m/min(=0.036)AccelerationRolling Load: 3,830kN AS-U: No. Adjusting (Assumption) 1stIMR Shift : No. Adjusting for low shifting speed (Same at 30 m/min)Rolling Load: 3,830kNAS-U: Adjusting to the best position of Smooth edge wave 1stIMR Shift: No. Adjusting
9、 for low shifting speed (Same at 30 m/min)010203040506070800102030405060708001020304050607080010203040506070800102030405060708001020304050607080Rolling startWidthWidthRolling Load: 4,684kNNo good for Edge tightGood Smooth Edge wave for high AS-U abilityNo good large Edge wave for lack AS-U ability 0
10、1020304050607080+5 scale Upper Limit-5 scale Lower Limit1st IMR =-75Rolling Load: 3,830kN1stIMR Shift: Adjusting to the best positionAS-U: Adjusting to the best position of Smooth edge wave Improved but not small Edge wave 1st IMR =-751st IMR =-751st IMR =-1001st IMR =-1001st IMR =-1001st IMR =-7580
11、0m/min(=0.036)(I-unit) (I-unit) (I-unit) (I-unit) (I-unit) (I-unit) (I-unit) Decreasing Rolling Load12+ZR-MILL(Single AS-U)ABCDProdctiion:20 ton/HrStrip width:1240 mmStrip thicknedd:3.01.0 mmMaterial:SUS304Coil weight :22.5 TONSpeed : Max 500mpm25% Production increaseNot possible to rapidly accelera
12、te and decelerate the mill.ZR-MILL(Double AS-U)ABCDPossibe to rapidly accelerated and decelerate the mill.Improvement of strip shape controllability by introduction of Double AS-U system, etc.123456050100200300400500150250350450Number of passedMaterial: SUS304 Reduction: 2.00.6 mm Strip width : 1240
13、 mmSet speedActual average speedSet rolling speed and actual average rolling speed of conventional ZR-millSet rolling speed and actual average rolling speed of conventional ZR-mill1234560200300400500700Number of passesSet speed Autual maximum speed Actual average speedSet rolling speed and actual av
14、erage rolling speed of KZR-mill100789 10 11600800 Actual average rolling speed is 50 to 60% of set rolling speed.Actual average rolling speed is 65 to 90% of set rolling speed.KZR-MILLConventional ZR-millAverage of autual rolling speed is low: about 50 to 60% of set rolling speed.Rolling speed (m/mi
15、n)Employment of neuro/fuzzy control for more flexible, automatic strip shape control.Material: SUS304 Reduction: 3.00.3 mm Strip width : 1025 mmAverage of actual rolling speed is high; about 65 to 95% of set rolling speed.ResultsResultsSolutionsSolutionsProblemProblemProdctiion:25 ton/HrStrip width:1240 mmStrip thicknedd:3.01.0 mmMaterial:SUS304Coil weight :22.5 TONSpeed : Max 500mpmRolling speed (m/min)Case of stainless steel RollingTypical Production Increase by Double AS-U Small Work Roll Gap (Only 68mm)Compact and High Mill Rightly by Monoblock Housing18HZ-MILL Co
