Rajalakshmi Engineering College, Thandalam （Thandalam Rajalakshmi工程学院）.pdf

Camshaft For the fictional characters of the same name, see Camshaft (Transformers). Computer animation of a camshaft operating valves A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part. CAMPROFILE Cams: Type of cams, Type of followers, Displacement, Velocity and acceleration time curves for cam profiles, Disc cam with reciprocating follower having knife edge, roller follower, Follower motions including SHM, Uniform velocity, Uniform acceleration and retardation and Cycloidal motion. Cams are used to convert rotary motion into reciprocating motion. The motion created can be simple and regular or complex and irregular. As the cam turns, driven by the circular motion, the cam follower traces the surface of the cam transmitting its motion to the required mechanism. Cam follower design is important in the way the profile of the cam is followed. A fine pointed follower will more accurately trace the outline of the cam. This more accurate movement is at the expense of the strength of the cam follower. 18. Classifications - Displacement diagrams Cam Terminology: Physical components: Cam, follower, spring Types of cam systems: Oscilllating (rotating), translating Types of joint closure: Force closed, form closed Types of followers: Flat-faced, roller, mushroom Types of cams: radial, axial, plate (a special class of radial cams). Types of motion constraints: Critical extreme position – the positions of the follower that are of primary concern are the extreme positions, with considerable freedom as to design the cam to move the follower between these positions. This is the motion constraint type that we will focus upon. Critical path motion – The path by which the follower satisfies a given motion is of interest in addition to the e