Introduction: Concept of Manufacturing process, its importance. Classification of Manufacturing processes. Introduction to Casting process & steps involved. Varieties of components produced by casting process. Advantages & Limitations of casting process. Patterns: Definition, functions, Materials used for pattern, various pattern allowances and their importance. Classification of patterns. Binder: Definition, Types of binder used in moulding sand. Additives: Need, Types of additives used.
Sand Moulding : Types of base sand, requirement of base sand. Types of sand moulds. Sand moulds: Moulding sand mixture ingredients (base sand, binder & additives) for different sand mixtures. Method used for sand moulding. Cores: Definition, Need, Types. Method of making cores, Binders used. Concept of Gating & Risering. Principle involved. and types. Fettling and cleaning of castings. Basic steps involved. Casting defects-causes, features and remedies. Moulding machines : Jolt type, squeeze type, Jolt & Squeeze type and Sand slinger.
Special moulding Process :Study of important moulding processes Green sand, Core sand, Dry sand, Sweep mould, CO2 mould, Shell mould, Investment mould. Metal moulds: Gravity die-casting, Pressure die casting, centrifugal casting, Squeeze Casting, Slush casting, Thixocasting and continuous casting processes.
Melting Furnaces: Classification of furnaces. Constructional features & working principle of Gas fired pit furnace, Resistance furnace, Coreless Induction furnace, Electric Arc Furnace, Cupola furnace.
Welding process: Definition, Principles, Classification, Application, Advantages & limitations of welding. Arc Welding: Principle, Metal Arc welding (MAW), Flux Shielded Metal Arc Welding (FSMAW), Inert Gas Welding (TIG & MIG) Submerged Arc Welding (SAW) and Atomic Hydrogen Welding processes. (AHW) Gas Welding: Principle, Oxy – Acetylene welding, Reaction in Gas welding, Flame characteristics, Gas torch construction & working. Forward and backward welding.
Special type of welding: Resistance welding - principles, Seam welding, Butt welding, Spot welding and projection welding. Friction welding, Explosive welding, Thermit welding, Laser welding and Electron beam welding.
Metallurgical aspect in welding : Structure of welds, Formation of different zones during welding. Heat affected zone (HAZ). Parameters affecting HAZ. Effect of carbon content on structure and properties of steel. Shrinkage in welds & Residual stresses. Concept of electrodes, Filler rod and fluxes. Welding defects – Detection causes & remedy.
Principles of soldering & brazing: Parameters involved & Mechanism. Different Types of Soldering & Brazing Methods. Inspection Methods – Methods used for Inspection of casting and welding. Visual, Magnetic particle, Fluorescent particle, Ultrasonic, Radiography, Eddy current, Holography methods of Inspection.