elements of mechanical engineering
Semester : I/II
Course Code : 18EME15/25
CIE Marks : 40 SEE Marks : 60
elements of mechanical engineering
Sources of Energy: Introduction and application of energy sources like fossil fuels, hydel, solar, wind, nuclear fuels and bio-fuels; environmental issues like global warming and ozone depletion.
Basic concepts of Thermodynamics: Introduction, states, the concept of work, heat, temperature; Zeroth, 1st, 2nd and 3rd laws of thermodynamics. Concept of internal energy, enthalpy and entropy (simple numerical).
Steam: Formation of steam and thermodynamic properties of steam (simple numerical).
Boilers: Introduction to boilers, classification, Lancashire boiler, Babcock and Wilcox boiler. Introduction to boiler mountings and accessories (no sketches).
Turbines: Hydraulic Turbines-Classification and specification, Principles and operation of Pelton wheel turbine, Francis turbine and Kaplan turbine (elementary treatment only).
Hydraulic Pumps: Introduction, classification and specification of pumps, reciprocating pump and centrifugal pump, the concept of cavitation and priming.
Internal Combustion Engines
Classification, I.C. Engines parts, 2 and 4 stroke petrol and 4-stroke diesel engines. P-V diagrams of Otto and Diesel cycles. Simple problems on indicated power, brake power, indicated thermal efficiency, brake thermal efficiency, mechanical efficiency and specific fuel consumption.
Refrigeration and Air conditioning
Refrigeration Definitions Refrigerating effect, Ton of Refrigeration, Ice making capacity, COP, relative COP, Unit of Refrigeration. Refrigerants, Properties of refrigerants, List of commonly used refrigerants. Principle and Working of vapour compression refrigeration and vapour absorption refrigeration. Domestic refrigerator. Principles and applications of air conditioners, windows and split air conditioners.
Properties, Composition and Industrial Applications of engineering materials
Metals Ferrous: cast iron, tool steels and stainless steels and nonferrous: aluminium, brass, bronze. Polymers Thermoplastics and thermosetting polymers. Ceramics- Glass, optical fibre glass, cermets. Composites – Fiber reinforced composites, Metal Matrix Composites Smart materials Piezoelectric materials, shape memory alloys, semiconductors and insulators.
Joining Processes: Soldering, Brazing and Welding
Definitions. Classification and methods of soldering, brazing and welding. Brief description of arc welding, oxy-acetylene welding, TIG welding, and MIG welding.
Open & crossed belt drives, Definitions -slip, creep, velocity ratio, derivations for the length of the belt in open and crossed belt drive, the ratio of tension in flat belt drives, advantages and disadvantages of V belts and timing belts, simple numerical problems.
Types-spur, helical, bevel, worm and rack and pinion. Velocity ratio, advantages and disadvantages over belt drives, simple numerical problems on velocity ratio.
Lathe – Principle of working of a centre lathe. Parts of a lathe. Operations on lathe Turning, Facing, Knurling, Thread Cutting, Drilling, Taper turning by Tailstock offset method and Compound slide swivelling method, Specification of Lathe.
Milling Machine – Principle of milling, types of milling machines. Working of horizontal and vertical milling machines. Milling processes – plane milling, end milling, slot milling, angular milling, form milling, straddle milling, and gang milling. (Layout sketches of the above machines need not be dealt with. Sketches need to be used only for explaining the operations performed on the machines)
Introduction to Advanced Manufacturing Systems
Computer Numerical Control (CNC): Introduction, components of CNC, open-loop and closed-loop systems, advantages of CNC, CNC Machining centres and Turning centres. Robots: Robot anatomy, joints and links, common robot configurations. Applications of Robots in material handling, processing and assembly and inspection.