EBK MANUFACTURING PROCESSES FOR ENGINEE
6th Edition
ISBN: 9780134425115
Author: Schmid
Publisher: YUZU
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Chapter 6, Problem 6.30Q
To determine
The list of possible causes and the investigations performed to identify the parameters involved in the poor surface finish of the bearing races.
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Question 3A 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 μm. 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 1.8m/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, ??3.4 Indicate, using a sketch, the neutral point showing all relevant notation and dimensions
0/
Two thick slabs of 300mm each, the first one is used in cold rolling where
μ=0.08 while the second is used in cold rolling where µ-0.5. The mill roll
diameter in each case is the same as 600mm. Determine the max draft
(reduction) in both cases. Discuss the wide difference in results.
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.
Chapter 6 Solutions
EBK MANUFACTURING PROCESSES FOR ENGINEE
Ch. 6 - Prob. 6.1QCh. 6 - Prob. 6.2QCh. 6 - Prob. 6.3QCh. 6 - Prob. 6.4QCh. 6 - Prob. 6.5QCh. 6 - Prob. 6.6QCh. 6 - Prob. 6.7QCh. 6 - Prob. 6.8QCh. 6 - Prob. 6.9QCh. 6 - Prob. 6.10Q
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