Description
6 High Reversing Cold Rolling Mill for steel
strips
General Introduction
The production of this unit is to roll hot rolled coils with the
thickness of 1.2~2.5mm into high precision cold rolled coils with
the thickness of 0.15~0.5mm through several time of rolling. The
scale of the cold rolling production line is a production of 200
thousand tons of cold rolled steel coils per year. It adopts the
UCM-type single-stand 6-roll reversible cold rolling mill. The work
roll of the rolling mill is equipped with positive and negative
bending. The intermediate roll is equipped with positive bending
and twitch. The uncoiler is equipped. Both front and rear frames
are equipped with coiler, thickness gauge, etc., which can realize
large tension rolling and guarantee high-speed and stable
production with specified thinness.
Note: We can customize the machine according to our customer\'s
requirements.
3.
Technical data of the 1200mm 6-High Reversing Cold Rolling
Mill
|
No
|
Specification
|
Data
|
|
1
|
Specification of Rolling Mill
|
F1150/F420/F350x1380mm
|
|
2
|
Max Rolling Pressure
|
12000KN
|
|
3
|
Max Rolling Torque
|
73KN.m
|
|
4
|
Max Rolling Speed
|
1200 mpm
|
|
5
|
Max threading speed
|
30 m/min.
|
|
6
|
Max uncoiling speed
|
300m/min.
|
|
7
|
max. rolling speed
|
1200m/min.
|
|
8
|
Coiling tension
|
140~14KN
|
|
9
|
max. coiling speed
|
1250m/min. |
3.Product Program
Standard of raw material
|
Material quality
|
Pickled Hot Rolled Low Carbon Steel
1008/1010 EN1011:DD11/DD12/DD13 DIN1614:ST
|
|
Thickness
|
1.2mm-2.5mm
|
|
Coil Width
|
650mm-1050mm
|
|
Rolling diameter(interior /exterior)
|
Φ610-760mm/Φ850-2100mm
|
|
max. coil weight
|
30 tons
|
Standard of final products
|
Thickness
|
0.15-0.5mm
|
|
Coil Width
|
650mm-1050mm
|
|
Rolling diameter(interior/exterior)
|
Φ610-760mm/Φ850-2100mm
|
|
CPC centering control accuracy
|
±1mm
|
|
processing lubrication flow
|
8000 L/min. |
|
max. coil weight
|
30 tons
|
Characteristics of the Cold Rolling Mill
1200 6-hi reversible cold rolling unit is the cold rolling
production line with designed annual output of 200 thousand tons
and adopts UCM-type single-stand mill. It rolls pickled hot rolled
coils into cold hard coils. The unit is equipped with hydraulic
AGC. The work roll is equipped with positive and negative bending
and subsection cooling. The intermediate roll is equipped with the
positive bending and moving, and the front and rear frames are
equipped with double X-ray thickness gauge, etc. its
Characteristics:
1.Uncoiler is equipped with CPC automatic centering function,
which adopts EMG products from Germany, and improves the centering
response speed and position control accuracy.
2.Rolling line adjustment equipment adopts stepwise wedge
combination adjustment, and the input 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;
3.Positive and negative bending of the work roll; the intermediate
roll has transverse moving presetting, locking, and positive
bending control measure. The bending roll can be controlled from
single side; rollers are equipped with subsection cooling and roll
shape adjustment. Multiple-plate-shape control measure is able to
better control the plate shape of finished strips.
4.Double-station roll changing carriage is adopted, which realizes
the swift changing between the work roll and the intermediate
roll.
5.Roll system of the rolling mill, the turning roll, and the oil
removal roll bearing adopt air-oil lubrication, which can prolong
the bearing\'s life and reduce oil consumption, pollution and
maintenance quantity with high lubrication efficiency.
6.X-ray thickness gauge is adopted, improving the thickness
precision of finished strips.
7.The whole control system of the Six-High CRM adopts full digital
AC driving devices, PLC Unit process control and remote
communication network technology. The power supply and
distribution, AC and AC motor control, PLC system, remote I / O
system, AGC system and human machine interface (HMI) are integrated
through two-level network. In the design, the interfaces between
each system are designed in a unified way, so as to form the whole
automatic control system of modern CRM.
8.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.
9.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.
10.In the second-level automation controlled by AGC, rolling
schedule is further improved.
11.All key components and parts of hydraulic system adopt import
components and parts, which improves system reliability.
12.Hydraulic AGC system is equipped with advanced functions of
constant roll gap control, constant roll force control, constant
thickness control, mass flow control, thickness pre-control,
tension/speed automatic control, etc.
