High Speed 4Hi 6Hi Six Stands Tandem Cold Mill Line 750

High Speed 4Hi 6Hi Six Stands Tandem Cold Mill Line 750​

Composition

1. Hydraulic expansion uncoiler
2. Hydraulic shear, welding table
3. Horizontal spiral accumulator
4. entry processing table(include tension roll)
5. 4hi 6hi mills, 1#-2#-3#-4#-5#-6#
6. Hydraulic backup rollers changing device(6sets)
7. work roller changing device(2sets)
8. output processing table(hydraulic shear)
9. coil discharging car
10. Normal pressure hydraulic system
11. AGC hydraulic system 1Set
12. Oil-gas lubricating system 1Set
13. thin oil lubricating station 1Set
14. Process lubricating Station (Customer prepares)
15. Electric control system 1Set
16. thickness gauge system, 2sets

Flow:

Uncoiler→Shear, welding table→Horizontal spiral accumulator→entry processing table(include tension roll)→1# 4hi mill→2# mill→3# mill→4# mill→5# mill→6# mill→ exit processing table(include shear)→recoiler→Coil unloading car

Parameters:

Hydraulic AGC system:

• Electro-hydraulic servo valve: 609 institution, stainless steel oil tank and pipes.
• Include pump, tank, cooler, filter, energy accumulator, heater, valve groups, displacement sensor, pressure sensor, AGC software and computer cabinet, etc.
• System pressure: 31.5MPa
• Work pressure≤18-21MPa stepless adjustable
• Max pressing down speed
• 46# anti wearing hydraulic oil
• Oil cleanness in system: NAS7
• Temperature of oi:45±10℃
• Oil filtering cleanness in pipelines:10um
• Oil filtering cleanness before servo valve:3um
• Return oil filtering cleanness:10μm
• Consumption of cooling water:11m3/h
• Pressure of cooling water in circulation:0.4Mpa
• Electric heater:3×2kW

Electric control system:

• Siemens 6RA80 2-bridge 4-quadrant weak magnet speed adjusting system, Siemens PLC programming reply control.
• Optical cable or profibus cable connect modules to realize communication, with tension joining in.
• Constant coiling tension with coiling diameter increasing and track the tension.
• One main pane, two operator panels, cantilever panel at 1# mill, with current, speed, tension display.
• Control system includes programmable controller, touch screen, pump, actuator, signal inspection, etc., to show machine parameters, running state and fault analysis, with pressure, position sensors joining in control loop.
• Fault comes out, alarm lighting and sounding to remind and 5mins later abnormal signal show up