automation, resulting in changing main motor load distribution by the stands, Fig. 2.
Changing actual deformation conditions during the rolling from the target (calculated)
ones, Fig. 2, did not result in the overloads of the main motors by stands.
Table 4 Temperature and deformation conditions for coil rolling
(6×1500 mm, steel grade S355MC) at the mill 1700
Stand
No.
Values
Thickness*,
mm
Temperature,
°C
Calculated
rolling force,
MN×100
Maximum
allowed rolling
force, MN×100
Rolling rate,
m/s
Motor
power, kW
0**
140
01
120
1260
707.3
800
0.85
1343.5
1
90
1237
1217.0
2500
1.26
3758.8
2
60
1213
1508.2
2500
1.36
5046.3
3
42
1178
1260.1
2000
1.78
4676.5
4
32
1138
1039.2
2000
1.78
2907.3
4а
28
1074
722.3
2000
2.89
2129.9
5
22
934
1736.5
2400
1.36
3846.4
6
16
916
1772.1
2400
1.87
4714.1
7
12
898
1346.9
2000
2.67
3619.8
8
10
876
1460.3
1800
3.38
4575.2
9
8
856
1274.1
1700
4.27
4127.9
10
6
834
994.1
1500
5.70
3343.1
* thickness after pass
** initial data
Figure 2. Power of the main motors by stands: (1) allowed, (2) actual, (3)
calculated
- 1723 -