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
State the types of foundations We saw the different types of foundations commonly adopted for specific situation. In actual practice the situations are not very simple both in

Foil Butt Seam Welding This is a modification of seam welding, in which thin narrow strips of metal arc introduced between one or both of the circular electrodes and the work p

(a) A 50 mm dia. jet having a velocity of 18 m/sec. impinges without shock on a flat plate inclined at an angle to the axis of jet. If the plate is moving at 5 m/sec in the directi

MATERIALS WELDABILITY Electron beam welding has the ability to weld a variety of materials including dissimilar combinations. These can be split into general categories as to t

Turnouts: A turnout is an assembly of various components whereby a train running on one track may be diverted to another. A sketch of a left-hand turnout is given in Figur

what is the role of a correction couple and how does it come into picture in dynamically equivalent system?

Working of boiler : Water is filled in boiler shell through the feed valve up to 2/3 rd of shell. Water flows down through the down take header by means of descending wa

WRITE THE SHORT NOTES ON SLUDGE AND SCALE

what is coriolis component of acceleration?

(a) Write short note on steady flow energy equation and its applications. (b) A heat engine operating between two reservoirs at 1000k and 300k is used to drive a heat pump which