MD-1 (B-TECH Mechanical Engineering 5th)

 MACHINE DESIGN-1 

Objectives

1. Understand the meaning of machine design and basic design process

2. Understand the various types of machine design processes

3. Developing creativity for design

4. Co-relating the basic machine design with the of product design process

5. Developing the capability to analyse and select the various criteria of design

6. To be able to segregate components and design them independently.

7. Predict effectively and accurately the reasons of failure and then correlate it to the theoretical knowledge.

8. To learn various design consideration like stress concentration factor, factor of safety etc.

9. Design of various types of fasteners including riveted joints, bolted joints and welded joints under various loading conditions.

10. Design of transmission shafts subjected to torque, bending and axial loading

11. Design various kinds of keys for both shearing and crushing

12. Design rigid and flexible coupling for torque transmission

13. Learning of basic design of links and levers

14. Designing of some of the pipe joints

Detailed Contents

1. Meaning of design with special reference to machine design. Definition and understanding of various types of design, Elaborated Design process

2. Design and creativity ; Systematic design conceptualization, product design definition, underlying principles of design in Aesthetics and ergonomics, free body diagram for components design

3. General Design Considerations:

a) Concept of tearing, bearing, shearing, crushing, bending etc. PTU/BOS/ME/101/10-06-2005/BATCH-2004 30

b) Selection of materials, Basic criteria of selection of material, their designation, mechanical properties of those materials in brief.

c) Study of Stress concentration, factor of safety under different loading conditions,

3. Basic Design: Design for static loading, design for variable loading for both limited and unlimited life, concept of fatigue and endurance strength.

4. Design of fasteners:

a) RIVETS: Desing of rivets for boiler joints, lozenge joints (uniform strength joint), eccentrically loaded riveted joints

b) BOLTS: Understanding the various stresses/ failure in bolted joints, design of cylindrical covers, basic and eccentrically loaded bolts

c) WELDS: Design for various loading conditions in torsion, shear or direct load, eccentrically loaded welded joints.

d) MISCELLENEOUS: Design of spigot and socket cotter joint, Gib and Cotter joint and knuckle joint.

5. Design of Transmission Shaft Design of both solid and hollow shafts for transmission of torque, bending moments and axial forces, Design of shaft for critically speed, Design of shaft for rigidity and Design of stepped shafts for assembly

6. Design of Keys and Couplings: Design of sunk keys under crushing and shearing, design of splines, design of sleeve and solid muff coupling, clamp or compression coupling, rigid and flexible flange coupling, design of universal joint

7. Lever design: PTU/BOS/ME/101/10-06-2005/BATCH-2004 31 Basic lever design, design of foot and hand lever, cranked lever, bell crank lever, safety valve lever and shoe brake lever

8. Design of Pipe Joints: Stresses in pipe joints, design of circular flange pipe joint, oval flanged pipe joints, square flange pipe joint