Question

In a single pass flat rolling operation, a 400mm wide steel strip having a thickness of 10mm is reduced

to 8mm by using a roll of 600mm diameter. The roll-strip contact length is​

Answer 1

Answer:

Thanks for Free point's......

Answer 2

Answer: $L_{p}=2.449\times 10 \approx 24.49$

Explanation:

Given:

$Width\ of\ strip=400mm\\Initial\ thickness\ of\ strip=10mm\\Final\ thickness\ of\ strip=8mm\\Diameter\ of\ roll=600mm$

Concept: The roll-strip contact length is a function of roll radius and change in thickness of the steel strip in a single pass flat rolling operation.

Calculation:

$Projected\ length\ of\ contact=\sqrt{R\times \Delta h}\\Where,\\ R=Radius\ of\ roll\\\Delta h=Change\ in\ thickness\ of\ steel\ strip$

$L_{p}=Projected\ length\ of\ contact\ or\ roll-strip\ contact\ length$

$Radius\ of\ roll=600mm/2=300mm\\\Delta h=10-8=2mm\\L_{p}=\sqrt{300mm\times 2mm}\\L_{p}=\sqrt{600}=10\sqrt{6}$

$L_{p}=2.449\times 10 \approx 24.49$