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

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