JNTUK- B.Tech 3-2 Sem DESIGN OF MACHINE MEMBERS–2 Subject Material

JNTUK- B.Tech 3-2 Sem DESIGN OF MACHINE MEMBERS–2 Subject Material

UNIT-1

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.

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UNIT-2

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.

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UNIT-3

Pistons, forces acting on piston - construction design and proportions of piston, cylinder, cylinder liners.

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UNIT-4

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.

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UNIT-5

POWER TRANSMISSIONS SYSTEMS, PULLEYS: Transmission of power by belt und rope drives, transmission efficiencies, belts - flat and v types- ropes - pulleys for belt and rope drives, materials, chain drives.

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UNIT-6

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.

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UNIt-7

DESIGN OF POWER SCREWS: Design of screw, square ACME, buttress screws, design of nut, compound screw, differential screw, ball screw- possible failures.

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UNIT-8

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.

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