Machine performance

2.1 incoming material specification

Materials: pickling hot rolled coil Q195, 08Al, 20, SPHC, low alloy steel, etc

Maximum yield limit of mechanical properties σ s=360 N/mm2

Thickness 1.2-4 mm

Width 750-1015 mm

Coil diameter (inside / outside) Φ510 ×Φ 900-1800 mm

Maximum coil weight 18 t

2.2 finished product size

Thickness 0.18-1.2 mm

Width 750-1015 mm

Coil diameter (inside / outside) Φ 510/ Φ 900-1800 mm

Maximum coil weight 18 t

Thickness tolerance ± 0.005mm δ< 0.3mm

± 0.008mm 0.3≤ δ＜ 0.5mm

± 2% δ mm δ ≥0.5mm

3、 Main technical parameters

Mill specifications Φ 950/ Φ 370/ Φ 300 × 1150 mm

Maximum rolling pressure 11000 kn

Maximum rolling torque 80 kn. M

Belt piercing speed 18 m/min

Rolling speed 0 ～ 780 M / min

Uncoiling tension 5-50 kn

Coiling tension 12-120 kn (first gear, V < 450m / min)

6.3-63 kn (gear II, V ≥ 450m / min)

Maximum coiling speed 800 m/ min

Single side bending force of work roll (positive / negative) 300 / 180 kn

Intermediate roll traverse force 550 / 350 kn

Working roll diameter Φ 300- Φ 270 mm

Diameter of intermediate roll Φ 370- Φ 335 mm

Backup roll diameter Φ 950- Φ 890 mm

Length of working roll body 1150 mm

Intermediate roll displacement 200 mm

Maximum opening of working roll 20 mm

Uncoiler drum diameter Φ 460-520 (full circle) Φ 510）

Coiler drum diameter Φ 490- Φ 510 mm (full circle) Φ 510mm)

Axial floating amount of Uncoiler drum ± 75 mm

Diameter of lower pinch roll of head straightener Φ 400 mm

Guide roller diameter Φ 400 mm

Rolling line elevation +1000 mm

Adjustment stroke of rolling line elevation 125 mm

Process lubrication flow 6000 L / min

Working pressure of hydraulic system

Balance, roll bending, traverse, press up 21 MPa

General hydraulic transmission 10 MPa

The transmission direction of the mill is on the right side of the strip forward direction of the blooming pass.

4、 Unit installed level

4.1 Siemens DC speed regulation, SCR power supply (mixed structure) and PLC control are adopted for main rolling mill, uncoiler and front and rear coiler.

4.2 automatic thickness control (AGC) is performed by computer when fully hydraulic pressure is pressed. The hydraulic AGC system is controlled by two-level computer, which has the functions of constant roll gap, constant rolling force and thickness monitoring.

4.3 rolling mill has control means of pressure reduction deviation, positive / negative bending of working roll and positive bending of intermediate roll; The shape control means of the intermediate roll transverse setting and roll cooling.

4.4 the uncoiler has CPC automatic centering function.

4.5 quick roll change of working roll and intermediate roll.

4.6 the rolling mill electrical system has overload protection, strip breaking protection and emergency stop and other safety protection systems; The main machine and coiler have the functions of automatic deceleration with tail and accurate stop; The coiler has the function of circle number memory.

4.7 rolling mill speed control: speed / tension control of Uncoiler and coiler, digital display.

4.8 the rolling line elevation is adjusted quickly by electric pressing screw.

4.9 oil and gas lubrication of rolling mill bearings.

4.10 PLC programmable control is adopted for the production process interlock and fault alarm of the unit to realize the automation of production process.

4.11 the unit has the pre setting of process parameters, detection, display and alarm system of process parameters and key equipment parameters.