UNIT I - DESIGN OF FLEXIBLE ELEMENTS
Design of Flat belts and pulleys - Selection of V belts and pulleys –Selection of hoisting wire ropes and pulleys.
Design of Transmission chains and Sprockets.
UNIT II - SPUR GEARS AND PARALLEL AXIS HELICAL GEARS
Sped ratios and number of teeth-Force analysis -Tooth stresses - Dynamic effects – Fatigue strength- Factor of safety - Gear materials – Design of straight toothed spur & helical gears based on strength and wear considerations – Pressure angle in the normal and transverse plane- Equivalent number of teeth-forces for helical gears.
UNIT III - BEVEL, WORM AND CROSS HELICAL GEARS
Straight bevel gear: Tooth terminology, tooth forces and stresses, equivalent number of teeth. Estimating the dimensions of pair of straight bevel gears.
Worm Gear: Merits and demerits. Thermal capacity, materials-forces and stresses, efficiency, estimating the size of theworm gear pair. Cross helical: Terminology - helix angles -Estimating the size of the pair of crossed helical gears.
UNIT IV - GEAR BOXES
Geometric progression - Standard step ratio - Ray diagram, kinematics layout -Design of sliding mesh gear box - Design of multi sped gear box for machine tool applications - Constant mesh gear box - Sped reducer unit. – Variable sped gear box, Fluid Couplings, Torque Converters for automotive applications.
UNIT V - CAMS, CLUTCHES AND BRAKES
Cam Design: Types-pressure angle and undercutting base circle determination-forces and surface stresses.
Design of plate clutches – axial clutches-cone clutches-internal expanding rim clutches- Electromagnetic clutches. Band and Block brakes - external shoe brakes – Internal expanding shoe brake.