Saved Bookmarks
| 1. |
A strip with a cross section 150 mm x 4.5 mm is being rolled with 20% reduction of area using 450 mm diameter rolls. the angle subtended by the deformation zone at the roll center is (in radians)0.02 0.03 0.01 0.06 |
|
Answer» • Given:- A strip with a cross section 150 MM x 4.5 mm is being rolled with 20% reduction of area using 450 mm diameter rolls. • To find:- The angle subtended by the deformation zone at the roll center (in RADIANS) • Solution:- we know, θ = tan^(-1) [√(R∆H) / { R- (∆h/2)}] according to the question,as we have 20% reduction in cross sectional area 150×4.5× 0.8 = 150×h or, h = 3.6 mm ∆h= 4.5-3.6 = 0.9 mm θ = tan^(-1) [√(225×0.9) / { 225- (0.9/2)}]= 362° = 0.06 rad so, the angle subtended by the deformation zone at the roll center is (in radians) 0.06 |
|