class="w3-opacity">CONCEPTS DESIGN OF MACHINE MEMBERS– II
• This course gives the insight of slider and roller bearings and the life prediction.
• Learn to design I.C engine parts
• Design the mechanical systems for power transmission elements such as gears,belts,ropes,chains, keys
and levers
UNIT – I
BEARINGS: Classification of bearings- applications, types of journal bearings – lubrication – bearing modulus –
full and partial bearings – clearance ratio – heat dissipation of bearings, bearing materials – journal bearing
design – ball and roller bearings – static loading of ball & roller bearings, bearing life.
UNIT – II
ENGINE PARTS: Connecting Rod: Thrust in connecting rod – stress due to whipping action on connecting rod
ends – cranks and crank shafts, strength and proportions of over hung and center cranks – crank pins, crank
shafts.
Pistons, forces acting on piston – construction design and proportions of piston, cylinder, cylinder liners,
UNIT – III
Design of curved beams: introduction, stresses in curved beams, expression for radius of neutral axis for
rectangular, circular, trapezoidal and t-section, design of crane hooks, c –clamps.
UNIT – IV
POWER TRANSMISSIONS SYSTEMS, PULLEYS: Transmission of power by belt and rope drives ,
transmission efficiencies, belts – flat and v types – ropes - pulleys for belt and rope drives, materials, chain drives
DESIGN OF POWER SCREWS: Design of screw, square ACME, buttress screws, design of nut, compound
screw, differential screw, ball screw- possible failures.
UNIT – V
SPUR & HELICAL GEAR DRIVES: Spur gears- helical gears – load concentration factor – dynamic load
factor, surface compressive strength – bending strength – design analysis of spur gears – estimation of centre
distance, module and face width, check for plastic deformation, check for dynamic and wear considerations.
UNIT – VI
MACHINE TOOL ELEMENTS: Levers and brackets: design of levers – hand levers-foot lever – cranked lever
– lever of a lever loaded safety valve- rocker arm straight – angular- design of a crank pin – brackets- hangers-
wall boxes.
Wire Ropes: Construction, Designation, Stresses in wire ropes, rope sheaves and drums.