Machine Information

56" (1422mm) HITACHI 5 STAND 6 HI CONTINUOUS TANDEM COLD ROLLING MILL

Stock #: 115325

Equipped With

HIGHLIGHTS:
Manufacturer: Hitachi
Style: 5 Stand Tandem Mill
Mill Stands: 6 HI on Each Stand w/ Quick Change Roll Cars
Current Configuration: Tandem Mill with Flying Shear and Carousel Reel
 
Continuously Coupled to Pickle Line at Entry
Year of Manufacture: 1989 (Completely Rebuilt 2001 and Additional Upgrades)
MATERIAL RANGE:
Material Width: 56" (1422mm) Max
Entry Thickness Range: 0.180" - 0.08" (4.572mm - 2.032mm)
Exit Thickness Range: 0.008" - 0. 100" (0.203mm - 2.54mm)
Exit Line Speed: 7000 FPM (2133 MPM)
ID Exit: 34 Ton x 78.74" OD x 20" (34 Ton X 2000mm OD X 508mm)
Roll Force: 2000 Tons Max
Shapemeter Roll - Yes, Davy Type
 
POWER
Mill Stands: 35,872 HP (26,750 kW)
Tension Reels: 9454 HP (7,050 kW)
Entry Bridle: 900 HP (671 kW)
Total Power: 46,227 HP (34,471 kW)
 
GENERAL LINE SPECIFICATIONS:
 
MILL ENTRY CONFIGURATION
Entry Speed, design rated for 869 FPM
Bridle top speed increased to 970 FPM
Bridle #4 & Steering Unit
(2) IMS Thickness Gauges (Installed 2021)
(1) Traversing profile thickness gauge, serves as backup center thickness gauge
(1) primary stationary center thickness gauge. Entry centering guides
Three roll non-driven bridle, Gauge is equipped with a laser velocimeter enabling accurate mass flow control
 
MILL STANDS
HC mill in stands 1 to 4:
-Intermediate roll (IMR) shifting but without IMR bending
UC mill in stand 5:
-Intermediate roll (IMR) shifting with IMR Bending
Intermediate cooling between stands
Work roll bending crown in and crown out cylinders on 5 stands
 
Work roll diameter range: 18.7" to 16.35" x 60" face width
Intermediate roll diameter range: 21.26" to 18.9"
Backup roll diameter range: 53" to 48.43"
All Backup, Intermediate, and work rolls are ground flat with zero crown
Shape is achieved through roll bending and intermediate shifting.
Automatic cooling spray header at 2" zone spacing and 30 zones integrated with shapemeter roll feedback to apply thermal expansion profile adjustments to work rolls and intermediate rolls
 
Roll force by bottom hydraulic cylinder of the mill stand
Hitachi HYROP forced motor valve is used to obtain responsive gap changes.
Design Force Limit: 2000 tons
Tension by cylinder control force limit (software) - Sheet: 1800 Ton / Tin: 1200 Ton
 
Pass line adjustment by hydraulic step and wedge assembly at top of mill stand with integral load cells for measuring roll force
 
Backup Roll Bearing: Morgoil Oil Film Bearing
Work Roll and Intermediate Roll bearings: Spherical roller bearings with air-oil lubrication
Top and Bottom Work Rolls Independently Driven
 
MILL STAND POWER
Stand 1 Top: DC 1475KW 142/426 rpm / Bottom: DC 1475 KW 142/426 rpm
Stand 2 Top: DC 2600KW 250/750 rpm / Bottom: DC 2600 KW 250/750 rpm
Stand 3 Top: (2x's) DC 1550KW 315/945 rpm / Bottom: (2x's) DC 1550 KW 315/945 rpm
Stand 4 Top: (2x's) DC 1550KW 315/945 rpm / Bottom: (2x's) DC 1550 KW 315/945 rpm
Stand 5 Top: (2x's) DC 1550KW 315/945 rpm / Bottom: (2x's) DC 1550 KW 315/945 rpm
 
(5) ROLL CHANGE CARS; used to change work roll and intermediate rolls
 
INTERSTAND
Cobble guards: exit side of each mill stand to prevent strip break entanglement in the roll stack
Thickness gauge between stand 1 and stand 2 for entry gauge control (Installed 2021, IMS).
The gauge is equipped with a laser velocimeter enabling accurate mass flow control
 
MILL EXIT
60" Davy Shapemeter Roll - Segmented air bearing, 2" wide rotors, 30 zones
 
Flying shear - Strip Cutting Speed - 700 to 1000 FPM depending on thickness
(2) IMS Exit thickness gauges (New 2021)
Equipped with laser velocimeters enabling accurate mass flow control
Allows each gauge to traverse offline to standardize without interrupting continuous operation
 
EXIT CAROUSEL MANDREL TYPE RECOILER:
Individual Drive Motors
Mandrel #1: (3x's) DC 1175 KW 223/870 rpm
Mandrel #2: (3x's) DC 1175 KW 223/870 rpm
 
CAROUSEL TENSION REEL
Coil to Coil, continuous operation, rotation of the carousel ramping to top speed
EQUIPPED WITH:
Belt wrapper
Sleeve Loading
Sleeve Dimensions: 19.8" ID; 21.3" OD x 40" width for the production of tinplate to prevent collapsed coil eyes.
Inspection Station with inspection coil car
Exit coil car
Exit walking beam, banding station, scale, coil ID marking robot with RFID
Two walking beams in series covering 16 coil saddles at 2300 mm spacing
 
Full Complement of Backup Rolls; Intermediate Rolls; Work Rolls; Chocks & Bearings
 
Complete Roll Count Provided on Request