500mm Nash 4-Hi Reversing Cold Mill: RM-445

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500mm Nash 4-Hi Reversing Cold Mill: RM-445

Description

500mm Nash 4-Hi Reversing Cold Mill: RM-445 / VERY NICE ROLLING MILL


Manufacture:

 - Nash / New 1976

 - Fully revamped 2012 (new electric system & drive system)


Mill Type:

 4-Hi Reversing Cold Rolling Mill


Material:

 - High-carbon steel, stainless steel, copper alloys, etc.


Strip Width:

 - 500 mm max (20")


Strip Thickness:

 - 7.0 mm max entry down to 0.3 mm min exit (.276" - .012")


Line Speed:

 - 300 mpm (984 fpm)

 - 15 mpm threading speed (49 fpm)


Coil Size:

 - OD max - 1750 mm (69")

 - Weight - 6 mtons (13,200 lbs)


Rolling force:

 - 500 tons hydraulic servo cylinder push down type


UNCOILER

 - Mandrel type

 - 1 x 75 kW, 500 V DC, 500/1500 rpm, 440V

 - Coil car, gearbox


MILL

 - Work rolls - 635mm face x 175mm diameter

 - Backup rolls - 610mm face x 524mm diameter

 - In-foundation roll change sled

 - Gauge Control:

   1. New AGC & Isotope AM241 1Ci (Gamma ray) thickness gauge (new 2012)

   2. AGC FB, FF and mass flow

 - Roll Bending:

   1. Positive and negative function with PQ valve (Moog GmbH)

 - Motor/Drive:

   1. New ABB DC motor drive system – 2012 – DCS800-S2

   2. 2 x 450 kW, 500 V DC, 500/1000 rpm

 - Cooling water: max 2 kg/cm2, (max.32 C degree)

 - Air: max 5 kg/cm2

 - Pinion Stand

 - Gearbox

 - 2 Universal joints

 - Roll force hydraulic unit

 - Normal hydraulic unit

 - Roll coolant tank (clean/dirty): 13 m³ each / pumps / temperature control unit

 - Filter - Hoffman type unit / Oil mist system / Emulsion type filter (paper type filter without precoat)


RECOILER

 - 2 mandrel type units

 - 2 coil cars

 - Motor - DC 500 V, 300 kW, 440V


ELECTRICS

 - Manufacturer: Mitsubishi Melsec 

 - Type: Q3 PLC system - HMI - SPC (Statistical Process Control)


2012 Revamping Notes:

 - Revamped and Reused items: housing, various backup, work rolls with chocks, payoff reel with coil feeder, tension reels, coil cars, motors, spindle and Hoffman type filter

 - Newly items: clean/dirty tank, electric control/ABB drive system, AGC/gamma ray thickness gauges, HMI, servo hydraulic system, main roll force cylinder, positive/negative bending, normal hydraulic system, shear, left/right side guides with wiper, left/right reel out board bearings.

 - New foundation drawing, cabling and piping, pump unit (coolant), oil mist, drawing and manuals

Specifications

ManufacturerNASH
ModelReversing Cold Mill
Year1976
ConditionUsed
Stock NumberRM-445