Research Article

Stability Analysis of a Nonlinear Coupled Vibration Model in a Tandem Cold Rolling Mill

Table 2

Structure specifications of the UCM mill.

ParametersValue

Work roll mass, (Kg)3914
Intermediate roll mass, Mim (Kg)5410
Backup roll mass, Mb (Kg)31330
Work roll contact spring constant, (N m−1)0.91 × 1010
Intermediate roll spring constant, Kim (N m−1)1.03 × 1010
Backup roll spring constant, Kb (N m−1)5.85 × 1010
Work roll damping coefficient x direction, Cwx (N·s m−1)5.00 × 104
Work roll damping coefficient in y direction, Cwy (N·s m−1)1.64 × 105
Intermediate roll damping coefficient, Cim (N·s m−1)5.70 × 105
Backup roll damping coefficient, Cb (N·s m−1)5.10 × 106
Work roll rotational inertia mass, Jw (Kg·m2)1381
Work roll rotational spring constant, Kwj (N·m·rad−1)7.90 × 106
Work roll rotational damping coefficient, Cwj (N·m·s rad−1)4178
Work roll diameter, (mm)212.5
Intermediate roll diameter, Rim (mm)245
Backup roll diameter, Rb (mm)650
Work roll installation offset, e (mm)5