Assumption in rolling analysis

Q. Calculate the bite angle when rolling plates 12 mm thick using work rolls 600 mm diameter and reducing the thickness by 3mm

1. 5.73

Q. A strip with cross-sectional area 150 mm $\times$ 4.5 mm is being rolled with 20% reduction of area using 450 mm diameter rollers. The angle subtended by the deformation zone at the roll centre is (in radians)

1. 0.01
2. 0.02
3. 0.03
4. 0.06

Q. In a slab rolling operation, the maximum thickness reduction $\left(\Delta h_{max}\right)$ is given by $\Delta h_{max}={\mu }^{2}R,$ where R is the radius of the roll and $\mu$ is the coefficient of friction between the roll and the sheet. If $\mu =0.1$, the maximum angle subtended by the deformation zone at the centre of the roll (bite angle in degree) is____.

1. 5.73

Q. In a single pass rolling process using 410 mm diameter steel rollers, a strip of width 140 mm and thickness 8 mm undergoes 10% reduction of thickness. The angle of bite in radians is

1. 0.006
2. 0.031
3. 0.062
4. 0.600