La description
1780mm
4Hi Reversible cold rolling mill
1.General
Information
This unit
produces a pickled hot rolled coil with a thickness of 6mm, which
is rolled into several high-precision cold-rolled coils of
0.5-4.5mm by several passes, using a single-stand reversible
four-roll UCM cold rolling mill. The work rolls are provided with
positive and negative bends, the intermediate rolls are provided
with positive bending rolls and twitching, and the uncoiling
machine and the front and back of the frame are provided with a
tension coiler, a thickness gauge, a laser speedometer, etc., which
can realize large tension rolling. Guarantee high-speed and stable
production of thin gauge products.
2.Characteristics
of the Rolling Mill
The 1780 4Hi reversible cold-rolling unit is
designed for a cold-rolling line with an annual production capacity
of 200,000 tons and is available in a single-bay UCM model. The
acid washed hot rolled coil is rolled into a chill roll. The unit
is equipped with a hydraulic AGC, a work roll with a bending roller
and a segmental cooling machine before and after the double X-ray
thickness gauge. Its characteristics
are:
Uncoiler is equipped with CPC automatic
centering function, which adopts EMG products from Germany, and
improves the centering response speed and position control
accuracy.
+Rolling
line adjustment equipment adopts stepwise wedge combination
adjustment, and the roll diameter can quickly and
automatically control the stepwise wedge displacement of the oil
cylinder drive to the right position, realizing automatic and quick
adjustment of the rolling line (companys utility model patent:
ZL201120139812.6);
+Work roll bending roll; bending roll can be
controlled separately on one side; roll section cooling roll type
adjustment. A variety of plate type control methods can better
control the shape of the finished strip.
+ImportedX-ray
thickness gauge is adopted, improving the thickness precision of
finished strips.
+The rolling
mill adopts Simens S7-400 programmable controller, DC drive adopts
6RA80 all-digit speed regulating system, and the electric system
takes safety protection measures of overload protection, strip
breakage protection, emergency cut-off, etc.; the unit is equipped
with functions of strip tail automatic deceleration, accurate
stopping and multi-point stopping; coiler is equipped with
functions of cycle memory, strip length calculation, and jaw
accurate positioning.
+AGC
automatic system adopts S7-400+FM458 structure, which makes the
utmost use of the controller and matches the quick response of the
high-speed rolling mill.
+In the
second-level automation controlled by AGC, rolling schedule is
further improved.
+All key
components and parts of hydraulic system adopt import components
and parts, which improves system reliability.
+Hydraulic
AGC system is equipped with advanced functions of constant roll gap
control, constant roll force control, constant thickness control,
mass flow control, thickness precontrol, tension/speed automatic
control, etc.
3.Specifications
of Supplied Materials
Material:
Mechanical Property:
Requirements:
Thickness:
Width:
Coiling diameter
(inner/outer):
Max coil weight:
|
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σs≤380 N/mm²
1) Strip camber: ≤5mm/2m; tower:
≤5mm
2) Strip passband tolerance: ≤±0.15mm;
transverse difference: ≤0.20mm
3) Uniform hardness, and no obvious defects
like inclusions, sinkholes or raw edges.
6 mm
1780 mm
F508/F1600
mm
25t |
Finished product specification
Thickness:
Width:
Coiling diameter
(inner/outer):
Max coil weight:
|
0.5~4.5 mm
1600 mm
F508/F1600
mm
25 t
|
4.Main
Technical Parameters of the Unit
- Rolling
mill specification:F 1450/F 420 1900mm
- Max rolling
pressure: 18000 KN
- Max rolling
torque:100 KN.m
- Max
threading speed: 30m/min
- Max
uncoiling speed: 300m/min
- Max rolling
speed:
600
m/min
- Uncoiling
tension: 50 KN
- Coiling
tension:
180~18
KN
- Max coiling
speed:
620m/min
5.Equipment
level
+.Drive
system of main rolling mill, uncoiler and coiler adopts Siemens
6RA80 all-digit DC speed regulation, thyristor power supply and
unit PLC control.
+The basic
automation system of the unit is composed of Siemens S7-400 PLC as
the master controller and the corresponding remote I/O(ET-200M),
which controls the rolling line and the operation of auxiliary
equipment.
+.AGC is a
FM458+1.5 level automatic thickness control system with full
hydraulic screw-up. It is equipped with control functions of total
travel mass flow control, constant roll gap control, constant roll
force control, adjustment control, automatic prepressing control,
thickness precontrol AGC, thickness monitor AGC, tension/speed AGC,
acceleration and deceleration AGC compensation control, roller
eccentricity compensation, etc., and it is also equipped with
process management functions of rolling process database, data
presentation and operating control, product quality tracing,
automatic recording of high-speed rolling data, automatic report
generation, failure warning, and recording etc.
+The
rolling mill has plate-type control methods such as
pressure-adjusting deviation, working roller positive/negative
bending roller adjustment means and roll section
cooling.Upper and
lower work rolls are driven separately.
+Uncoiler is
equipped with CPC automatic centering function.
+The work roll is quickly
changed.
The electric system of the rolling mill takes
safety protection measures, including overload protection, strip
breakage protection, emergency cut-off, etc.; the unit is equipped
with functions of strip tail automatic deceleration, accurate
stopping, and multi-point stopping; coiler is equipped with
functions of cycle memory, strip length calculation, jaw accurate
positioning, and work roll spindle accurate
positioning.
+The unit is
preset with the process parameter, and detection, presentation,
alarming and stored recording for process parameters and equipment
key parameters.
+The master
operational console is equipped with human-computer interface,
image display of finishing rolling mill state (main parameters like
uncoiling, coiling tension value, current value, speed value etc.),
manual regulation, rolling process parameter setting, failure
warning and report printing.
+The rolling
line elevation adopts stepwise wedge quick
regulation.
+The
roller system is lubricated with oil and
gas.Strip
surface is degreased by the combination of air purge and roller
drying and degreasing.
11.Imported
X-ray thickness gauge is adopted.
+The
gear is made of five-stage precision alloy steel carburizing and
quenching gear and oil injection cycle
lubrication.
Key components
such as reel spindle, sector plate and hollow shaft are made of
alloy forged steel.
+Components
of low-pressure hydraulic system adopt renowned products using
imported technologies; key components like the high-pressure AGC
system, the bending roll and the CPC system also adopt imported
products.
Pays: |
China |
N ° de modèle: |
1600mm-1780mm 4Hi
|
Prix FOB: |
3000000 ~ 5e+06 / Set (Negotiable)
Obtenir le dernier prix
|
Localité: |
China |
Prix de commande minimale: |
3000000 per Set |
Commande minimale: |
1 Set |
Packaging Detail: |
plywood case and plastic film packing |
Heure de livraison: |
about 6 months |
Capacité de Fournir: |
10 Set per Year |
Payment Type: |
T/T, L/C, D/P |
Groupe de produits : |
cold rolling mill
|