Answered: A cam rotating clockwise at a uniform…

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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Transcribed Image Text:WERABE UNIVERSITY COLLEGE OF ENGINEERING AND TECHNOLOGY DEPARTMENT OF MECHANICAL ENGINEERING Mechanism of Machinery - Assignment - 02 A cam rotating clockwise at a uniform speed of 200 r.p.m. is required to move an offset roller follower with a uniform and equal acceleration and retardation on both the outward and return strokes. The angle of ascent, the angle of dwell (between ascent and descent) and the angle of descent is 120°, 60° and 90° respectively. The follower dwells for the rest of cam rotation. The least radius of the cam is 50 mm, the lift of the follower is 25 mm and the diameter of the roller is 10mm. Draw the cam profile A. When the line of action of follower passes through the centre of the cam and B. The line of stroke of the follower is offset by 20 mm from the axis of the cam. 2.) A flat faced reciprocating follower has the following motion: i. The follower moves out for 80° of cam rotation with uniform acceleration and retardation, the acceleration being twice the retardation. The follower dwells for the next 80° of cam rotation. It moves in for the next 120° of cam rotation with uniform acceleration and retardation, the retardation being twice the acceleration. The follower dwells for the remaining period. The base circle diameter of the cam is 60 mm and the stroke of the follower is 20 mm. The line of movement of the follower passes through the cam Centre. Draw the displacement diagram and the profile of the cam very neatly showing all constructional details. ii. iii. iv. Page 1 of 1

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