Demag Cold Rolling Mill

Description

Used 1320mm Stainless Steel Coil Manufacturing Plant (Cold Rolling Mill x 2 Lines).
Manufacturer: DEMAG (Germany).
Electrical components manufacturer: Reliance.
Year of installation: 1989

- COIL PREPARATION, MATERIAL:
Hot Rolled Stainless Steel (AISI 300 and 400 Series)
Strip thickness: 3mm to 6mm
Strip width: 600mm to 1,320mm
Yield strength: 60 kg/mm²
Shear strength: 70 kg/mm²
Coil I.D.: 610mm to 760mm (Entry)
Coil O.D.: 2,000mm (Entry and Exit), 2,200mm including paper
Minimum coil width: 1,000mm
Maximum coil weight: 20 tonnes
Line speed: 20 to 60 m/min
Threading speed: 20 m/min
Leader strip: Maximum 4.0 mm strip thickness
Leader strip length: 4m to 10m
Side trimmed scrap width: Minimum 12mm to maximum 40mm

- PRODUCT:
Cold Rolled Stainless Steel (AISI 300 and 400 Series)
Strip thickness: 0.3mm to 3.5mm
Strip width: 510mm to 1,320mm
Coil I.D.: 610mm
Coil O.D. (with paper and sleeves): 1,850mm maximum, 1,950mm minimum, 1,000mm minimum
Maximum coil weight: 20 tonnes (15 kg/mm strip width)

20-HI SENDZIMIR MILL

- UNWINDER
Drive: N = 224 kW
Speed: n = 0 to 408/1,200 rpm
Unwinding speed: V = 200 m/min
Gear ratio: I = 11.76
Mandrel diameter: 610mm
Expansion range: 560 to 620mm
Strip tension: Maximum 70 kN, minimum 7 kN

- MILL
Manufacturer: DEMAG (Germany)
Year of installation: 1989
Rolling direction: right to left
Mill drive: N = 2,260 kW (15% continuous overload)
Speed: n = 0 to 331/825 rpm
Rolling speed: V = 0 to 180/450 m/min
Gear ratio: i = 1

- ROLL SIZES
Work roll diameter: 63.5mm
1st intermediate roll diameter: 102mm
2nd intermediate roll diameter: 173mm
Backing bearing diameter: 300mm
Backing bearing width: 172.64mm
Number of backing bearings: 48

- LEVELLER
Drive: N = 27 kW
Speed: n = 900 rpm
Levelling speed: V = 20 m/min
Gear ratio: I = 25
Levelling roll diameter: 200mm

- WINDER
Drive: N = 2,500 kW
Speed: n = 0 to 265,331/1,058 rpm
Gear ratio: i = 4.505
Winder mandrel diameter: 610mm
Maximum strip tension: 400 kN at 360 m/min (32.6 tonnes)

- AUXILIARY EQUIPMENT
Hydraulic system: Pressure = 130 bar, flow = 420 L/min
Servo hydraulic system: Pressure = 210 bar, flow = 40 L/min
Roll cooling oil system: 7,000 L/min
Central lubrication oil system for gear units: 550 L/min
Sump pumping station: 500 L/min
Mist exhaust system: Volume = 100

- ANNEALING & PICKLING
Material: Hot and Cold Rolled Stainless Steel, 300 and 400 Series
Yield strength: 140 kg/mm² max. (Cold), 50 kg/mm² max. (Annealed and Hot)
Strip thickness: 3mm to 6mm (Hot Rolled) / 0.3mm to 3.5mm (Cold Rolled)
Strip width: 600mm to 1,320mm
Coil I.D.: 610mm
Coil O.D.: Maximum 2,200mm including paper
Maximum coil weight: 20 metric tonnes
Line speed:
- Entry: 6 to 40 (50) m/min
- Process: 6 to 32 (40) m/min
- Exit: 6 to 40 (50) m/min
Leader strip: Maximum thickness 4.0mm, length 4m to 10m

- GRINDING & POLISHING
Yield strength: 56 kg/mm²
Shear strength: 75 kg/mm²
Strip thickness: 3mm to 6mm (Hot Rolled Steel) / 0.5mm to 3.5mm (Cold Rolled Steel)
Strip width: 600mm to 1,320mm
Coil I.D.: 610mm
Coil O.D.: Maximum 2,200mm including paper, minimum 1,000mm
Maximum coil weight: 20 metric tonnes
Line speed: 5 to 10 m/min grinding (low) / 10 to 20 m/min polishing (high)
Threading speed: 10 m/min
Strip tension: 27 tonnes maximum (low speed) / 13.5 tonnes maximum (high speed)

- SKIN PASS MILL
Strip width: 510mm to 1,320mm
Strip thickness: 0.3mm to 3.5mm
Maximum coil weight: 20 tonnes (plus paper)
Maximum/minimum barrel diameter: 800mm / 750mm
Barrel length: 1,450mm
Approximate barrel hardness: 100 Shore D
Rolling speed: 0 to 100 / 200 m/min
DC motor: 0 to 450 kW (15% continuous overload), 0/649/1290 rpm
Mill gear ratio: I = 15,197
Roll positioning: hydraulic
Maximum roll force: nominal 1,000 tonnes / maximum 1,200 tonnes
P.O.R. (proof of rolling): minimum 610mm, maximum 630mm
Tension reel diameter: nominal 610mm, minimum 580mm

- SHEAR & SLITTER
Manufacturer: Reliance
Strip width: 500 to 1,320mm
Strip thickness: 0.3 to 3.5 mm
Maximum coil weight: 20 tonnes
Coil I.D.: 610mm
Coil O.D.: 1,000 to 7,500mm
Line speed: shearing - 60 m/min (0.3 - 2mm), 30 m/min (2 - 3.5mm)

- SLITTER
Manufacturer: Reliance
Strip width: 500mm to 1,320mm (finished minimum 45mm)
Strip thickness: 0.3mm to 3.5mm
Maximum coil weight: 20 tonnes
Coil I.D.: 610mm
Coil O.D.: 1,000 to 7,500mm
Line speed: 60 m/min (0.3 - 2.0mm thickness) max, 30 m/min (2.0 - 3.5mm thickness) max