To expose the students the different mechanisms, their method of working, Forces involved and
consequent vibration during working
UNIT I MECHANISMS
Machine Structure – Kinematic link, pair and chain – Grueblers criteria – Constrained motion –
Degrees of freedom - Slider crank and crank rocker mechanisms – Inversions – Applications –
Kinematic analysis of simple mechanisms – Determination of velocity and acceleration.
UNIT II FRICTION
Friction in screw and nut – Pivot and collar – Thrust bearing – Plate and disc clutches – Belt (flat and V) and rope drives. Ratio of tensions – Effect of centrifugal and initial tension – Condition for maximum power transmission – Open and crossed belt drive.
UNIT III GEARING AND CAMS
Gear profile and geometry – Nomenclature of spur and helical gears – Gear trains: Simple,
compound gear trains and epicylic gear trains - Determination of speed and torque- Cams – Types of cams – Design of profiles – Knife edged, flat faced and roller ended followers with and
without offsets for various types of follower motions
UNIT IV BALANCING
Static and dynamic balancing – Single and several masses in different planes –Balancing of
reciprocating masses- primary balancing and concepts of secondary balancing – Single and multi cylinder engines (Inline) – Balancing of radial V engine – direct and reverse crank method.
UNIT V VIBRATION
Free, forced and damped vibrations of single degree of freedom systems – Force transmitted to
supports – Vibration isolation – Vibration absorption – Torsional vibration of shaft – Single and
multi rotor systems – Geared shafts – Critical speed of shaft.