Description
Year 1967, 2001
Brand DEMAG, SIEMENS
Qty. 1 Second-hand 20-Hi reversing cold rolling mill
Mfc. DEMAG Built
Type 20-Hi x 1,000 mm wide Cold Rolling Mill
Material to be rolled Hot rolled and pickled coil of low carbon steel
Strip Width 1000 mm max. Strip thickness
Coil size 508 I.D x 1850 O.D Coil weight
Mill hand Right to Left Mill speed
Phase wise up gradation
2001
Erection & commissioning with sophisticated L&T drive, Modicon PLC, Spradecom
thickness gauge & AGC Alstom PLC.
2004
Thickness gauge up gradation with M/S Jasch Engg. Pvt Ltd.
2005
Coil rolling capacity increased 10 ton to 18 ton mechanically and electrically drive
upgraded with M/S control technique to get optimum Tension and AGC revamped with M/s Pitel Engg pvt Ltd, India
2010
PLC &HMI system upgraded with Siemens (Latest version).
2015
Drive system revamping with ABB ACS 800 (latest version) and Siemens PLC & HMI
Specification
Work rolls 2 no. 60 mm dia x1 114 mm length
Back up roll 8 no. with 40 no. bearing set
Roll barrel 300 mm dia x 172 mm width
Drive roll 4 no 170-173 mm dia, 1221 mm length
Idler Roll 2 no 170-173 mm dia, 1258 mm length
IMR 4 no 98 mm to 104 mm dia, 1185 mm length
Motors
Main mill
2 x 1750 HP DC, 0 – 450 – 760 rpm Gear box ratios
ETR
2 x 900 HP DC, 0 – 230 – 730 rpm Gear box ratios
DTR
2 x 900 HP DC, 0 – 230 – 730 rpm Gear box ratios
Pay off reel
1 x 25 HP AC (for threading only) Leveller and feeding motor
Pay off reel Cone Type Strip tension
Strip winding Under winding
Thickness control
Automatic gauge control system (AGC), Pitel Engg. Pvt Ltd.
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