All Materials regarding to B.tech R-20 in Mechanical Engineering in 3rd Year 2nd Semester with unit wise for Every Subjects are available.
👇👇Scroll Down for Important Questions and Topics Unit Wise 👇👇
| Mech 3-2 DMM 2 | ||
|---|---|---|
| S.No | Chapters / Units | Download Link |
| 1 | Unit 1 | Download |
| 2 | Unit 2 | Download |
| 3 | Unit 3 | Download |
| 4 | Unit 4 | Download |
| 5 | Unit 5&6 | Download Download |
Mech 3-2 DMM 2 Important Topics Questions
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.
DESIGN OF POWER SCREWS: Design of screw, square ACME, buttress screws, design of nut,
compound screw, differential screw, ball screw- possible failures.
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
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– V:
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.
Note: Design data book is permitted for examination
TEXT BOOKS:
1. Machine Design/ V. Bhandari/TMH Publishers
2. Machine Design/ NC Pandya & CS Shaw/ Charotar publishers
REFERENCES:
1. Machine Design: An integrated Approach / R.L. Norton / Pearson Education
2. Mech. Engg. Design / JE Shigley/Tata McGraw Hill education
3. Design of machine elements- spots/Pearson Publications
4. Machine Design-Norton/Pearson Publications.
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