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A cold roll aluminium strip of 1400 mm width from 4 mm to 3.2 mm thickness on a 4 high mill. The diameter of the roll is 450 mm. Plane strain of aluminium at inlet as used is 0.5 and corresponding plane stress is 135N/mm2. Take the value of μ as 0.05 and strain at the end of rolling as 0.8 when plane stress is 148N/mm2. The expression of roll force is given byF=ω√RΔhσm(1+μ√RΔhhb+hf)Nwhere symbols carry usual meaning.The rolling load will be_____tonne. 296.168 |
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Answer» A cold roll aluminium strip of 1400 mm width from 4 mm to 3.2 mm thickness on a 4 high mill. The diameter of the roll is 450 mm. Plane strain of aluminium at inlet as used is 0.5 and corresponding plane stress is 135N/mm2. Take the value of μ as 0.05 and strain at the end of rolling as 0.8 when plane stress is 148N/mm2. The expression of roll force is given by F=ω√RΔhσm(1+μ√RΔhhb+hf)N where symbols carry usual meaning. The rolling load will be_____tonne.
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