Illustration of cam, Mechanical Engineering

Illustration of CAM

A cam rotating at consisted angular velocity operates an oscillating follower. Draw cam profile for the given data:

Angular displacement of the follower = 20o
Angle of dwell after outstorke = 45o
Angle for outstroke with SHM = 90o
Angle for return stroke along uniform acceleration & retardation for retardation 5/3 of acceleration = 75o
Distance among pivot centre and roller centre = 10.5 cm
Distance of the pivot point from centre of rotation of cam = 14 cm
Roller radius = 1.5 cm
Minimum radius of the cam = 15 cm

Solution:

Draw displacement diagram with appropriate scale . The corresponding lift shall be 10.5 × (20/ 180) × π = 3.665 cm. The diagram is illustrated in figure

For drawing cam profile you might proceed as:

(a) Draw two concentric circles having radii equivalent to minimum cam radius & minimum cam radius as well as roller radius along above chosen scale.

(b) Mark primary position of roller and situate pivot centre A having distance from cam centre & distance from roller centre.

(c) Draw a circle having O as centre and radius equivalent to OA.

(d) Having OA as zero angle line plot angles for outstroke θo, dwell & return stroke θr and divide angles θo & θr in equivalent parts say 8. Mark points on pivot circle i, j, k, etc.

(e) Having i, j, k, etc. as centres and radius equivalent to distance among pivot centre & roller centre, draw arcs that give points on prime circle 1, 2, 3, etc.

(f) Transfer displacement from displacement diagram, above the prime circle with arcs like 1 – 1′, 2 – 2′, 3 – 3′, etc.

(g) Along centres at 1′, 2′, 3′, etc. draw series of arcs having radius equivalent to roller radius to denote follower position.

(h) Draw a smooth curve that is tangential to all of these follower positions. It is the needed cam profile.

Posted Date: 12/7/2012 5:49:42 AM | Location : United States







Related Discussions:- Illustration of cam, Assignment Help, Ask Question on Illustration of cam, Get Answer, Expert's Help, Illustration of cam Discussions

Write discussion on Illustration of cam
Your posts are moderated
Related Questions
Clutch cable routing :Ensure that the cable is routed as per standard routing, through the brackets provided.

Normal 0 false false false EN-US X-NONE X-NONE

Evaluate force and moment: What force and moment is transmitted to supporting wall at A   A force of 15 KN is transmitted to wall along with anticlockwise mome


SURFACE HARDENING: In many conditions surface hardening instead of throughout hardening only is enough to serve the reasons. Gears are illustrations. Surface hardening is atta

What are the Types of interface An interface can be regarded as an aggregate of conditions, rules and conventions which describes the information exchange, between two communic

what is relation between tool life and cutting speed?

Determine the maximum value of the coefficient of friction: A force of 200 N inclined at 60 o to the horizontal is applied to the block A weighing 400 N. find out whether blo

Determine: Reaction forces at the supports The shear and moment diagrams The location and value of the maximum shear and moment The cross section is an angle section as given in

what do you mean by law of belting and also explain the crowning of pulleys ?