1676mm Hunter 4-Hi Cold Rolling Mill and Twin-Roll Strip Casters: RM-451 and MC-452

1676mm Hunter 4-Hi Cold Rolling Mill and Twin-Roll Strip Casters: RM-451 and MC-452

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Description

Manufacture:

  • FATA Hunter
  • New - 1996
  • Decommissioned - 2016
  • Status - dismantled, in dry storage


Scope:

  • Twin-Roll Strip Super Caster #1 - 1013mm roll (39.88")
  • Twin-Roll Strip Caster #2 - 826mm roll (32.5")
  • Hunter 4-Hi Cold Mill (6.0mm to 0.2mm)


Alloys:

  • 1xxx, 3xxx, 5xxx
  • 8xxx alloys possible from #1 caster material


CASTERS:

  • CASTER #1 = FATA HUNTER
  • CASTER #2 = CHINESE MADE


Strip Width Caster #1:

  • 1676mm max on 1xxx, 3xxx, 8xxx, alloys
  • 1200mm max on 5xxx alloys


Strip Width Caster #2:

  • 1450mm


Strip Thickness:

  • 6.3mm max (.248")
  • 6.0-8.0mm possible with 3003 alloy off Caster #2


Coil Weight:

  • 10,000 kg (22,000 lbs)


Preload Cylinders:

  • Caster #1 = 610mm diam
  • Caster #2 = 450mm diam


Max Preloading:

  • Caster #1 = 2042 tons
  • Caster #2 = 1500 tons


Housing Size:

  • Caster #1 - 343mm x 374mm
  • Caster #2 - 300mm x 450mm


Line Speeds:

  • 2268 mm/min (7.5 fpm)


Roll Moments:

  • Caster #1 - rated = 373,000 N / peak = 520,000 N
  • Caster #2 - rated 300,000 N


Max. Coiling Tension

  • Caster #1 = 165,000 N
  • Caster #2 = 140,000 N


Caster Drives:

  • Caster #1 = 2 x 43kW, 0/500rpm
  • Caster #2 = 2 x 33 kW, 0/250 rpm


Shears:

  • 203mm shear cylinder diameter


Coiler:

  • ID - 510mm both casters
  • OD - 1900mm both casters
  • No outboard bearing required


Hand of Line

  • Caster #1 - Left to right (from operators side)
  • Caster #2 - Right to left (from operators side)



COLD MILL - FATA HUNTER

Coil Transportation System

  • Flat cars, 250mm diam tempered steel wheel, 12 mpm running speed / four idler rolls on the upper side to carry the coils, with anti-wear bearings.


Entry Coil Car

  • 10 mton max weight, 1900mm max diam


Spool handling system


Uncoiler

  • Adjustable based (150mm travel)
  • Diameter expansion = 460 - 520mm
  • Core shaft length = 2050mm
  • Drive = 625 kW / 400 rpm / gear ratios low speed: 14.49:1 / high speed: 4.65:1
  • Tension range = 319 - 19925 k9
  • Outboard bearing


Entry Tensioning Device

  • Composed of: 1 x switch plate, 2 x 245mm clamping rolls, 3 x 178mm tensioning rolls, 1 x 178mm polishing roll, 4 x spray beams
  • All rolls are balanced by dynamic and static, chrome 0.05 -- 0..08mm, hardness 70 -- 7 5 degrees, roughness 30 -- 32 RMS or 5-7 RMS (polishing roll).


Edge Guide System

  • Servo valve / Signal processing / Photoelectric sensing / cables
  • Centering accuracy = +/- 1.0mm


Mill Stand

  • Housing cross section = 3024cm2 (700 x 432mm)
  • Roll bending = 120 ton force
  • Hydraulic Load Cylinders (with position sensor) = 710mm diam, 1635mm stroke, 155 kg/cm2 working pressure, Load force = 600 tons x 2 (max)


Work Rolls

  • 362-400mm diam x 1950mm face x 3680mm total length
  • Roll body hardness = 95-100 shaw
  • Roll neck hardness = 40-45 shaw
  • Radial cylindrical roller bearings = (SKF) L313894B/VU001(diameter 220/310x 225)
  • Axial ball bearing = SKF 305272DC(diameter 220X 309.5X 76)
  • Chocks (bearing blocks)


Backup Rolls

  • 889-965mm diam x 1850mm face x 4364mm total length
  • Roll body hardness = 65-70 shaw
  • Roll neck hardness = 40-45 shaw
  • Radial 4-row cylindrical roller bearings = SKF 31 349 9B(diam 51 7.1 XSl 3X 5.94)
  • Radial 2 rows of cylindrical roller bearings = SKF 3 32 2] 69 (diam 3 05 x 500 x 200)


Roll Balance System = included


Mill Drive

  • 2 x 900kW DC motors, 0/400/1200rpm
  • Gearbox = 2700 hp rated at 400rpm (service factor 1:5) - Low speed = 7.19:1 - High Speed = 2.59:1
  • Maximum transmission moment = 29.89TM at low speed, 10.46TM at high speed
  • Spindles and couplings


Edge Trimmer

  • Cut range = 0.2 - 2.5mm
  • Max edge cut = 2 x 50mm


Sheet Roll

Feed Roll

Exit Guide Platform

Strip Purging Device


Coiler

  • Expansion range = 460-510mm
  • Core shaft = 2050mm long
  • Motor = 2 x 350kW DC motors, 400/1550 rpm, 282k9 - 17601 k9
  • Outboard bearing


Belt-Wrapper


Upper Spool Device with storage rack


Coil weighing station


Roll Change device for upper backup roll


Work Roll change car



Rolling Oil Supply System

  • Oil model MR9 24+ Wyroll 2
  • 4000 l/min flow rate
  • 3 x Clean oil tanks
  • 3 x clean oil pumps (centrifugal flow, 2000 L/min, 9 bar head pressure, 45kW - 3000 rpm - 3ph AC motor)
  • Heat exchanger
  • Rolling Oil Filter
  • Support roll spray beam - max flow rate = 360 L/min at 5.5 bar
  • Work roll spray beam - 546 L/min low flow rate, 1094 L/min medium flow rate


Hydraulics

  • 75 bar working pressure
  • Medium = CSH-2 2.25.2


Roll Bending Hydraulics

  • Medium = Mobil DTE25
  • Working Pressure = 155 bar


Load Cylinder and strip alignment hydraulic system


Pneumatic system = 5-7 bar


Specifications

ManufacturerFATA Hunter
Year1996
ConditionUsed
Stock NumberRM-451