A rolling operation on a 250 mm wide, 8 mm thick, 1112 cold rolled steel takes place using hardened steel rolls with a surface finish of 0.03 um. The rolls have a diameter of 350 mm and rotates at 115 rpm. The final thickness of the plate is 6 mm and the entry speed of the plate is 1.8 m/s. Calculate: The minimum coefficient of friction required, that will make the rolling operation possible. The required roll force.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Question 3
A rolling operation on a 250 mm wide, 8 mm thick, 1112 cold rolled steel takes
place using hardened steel rolls with a surface finish of 0.03 um. The rolls have
a diameter of 350 mm and rotates at 115 rpm. The final thickness of the plate
is 6 mm and the entry speed of the plate is 1.8 m/s. Calculate:
3.1 The minimum coefficient of friction required, that will make the rolling operation
possible.
3.2 The required roll force.
3.3 The position of the neutral point, xn
3.4 Indicate, using a sketch, the neutral point showing all relevant notation and
dimensions.
Transcribed Image Text:Question 3 A rolling operation on a 250 mm wide, 8 mm thick, 1112 cold rolled steel takes place using hardened steel rolls with a surface finish of 0.03 um. The rolls have a diameter of 350 mm and rotates at 115 rpm. The final thickness of the plate is 6 mm and the entry speed of the plate is 1.8 m/s. Calculate: 3.1 The minimum coefficient of friction required, that will make the rolling operation possible. 3.2 The required roll force. 3.3 The position of the neutral point, xn 3.4 Indicate, using a sketch, the neutral point showing all relevant notation and dimensions.
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