Question 3A rolling operation on a 250 mm wide, 8 mm thick, 1112 cold rolled steel takesplace using hardened steel rolls with a surface finish of 0.03 um. The rolls havea diameter of 350 mm and rotates at 115 rpm. The final thickness of the plateis 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 operationpossible.3.2 The required roll force.3.3 The position of the neutral point, xn3.4 Indicate, using a sketch, the neutral point showing all relevant notation anddimensions.

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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.

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.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Forming and Shaping

Metal forming is a category of metalworking process through which the material can be given the desired shape and size by subjecting it to plastic deformation, where the component undergoes bulk deformation process upon application of loads. Unlike the shearing and machining process, the material does not undergo up to a failure point as indicated in the stress-strain curve. Hence, the stresses induced during the forming process are greater than yield strength but less than the failure strength of the material. The process does not lead to the loss of material, so it can be said to be an economical process. During forming, the material is subjected to tensile forces, compressive forces, bending, and shearing loading conditions. The material should possess the property of ductility to undergo the forming process.

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