MT (B-TECH Mechanical Engineering 4th)

Unit I Metal Casting Processes: Advantages and limitations, sand mold making procedure. Patterns and

Cores: Pattern materials, pattern allowances, types of pattern, color coding. Molding materials: Molding

sand composition, sand preparation, sand properties and testing, Sand molding processes

Unit II Cores: Types of cores, core prints, chaplets, and chills. Gating systems: Gates and gating systems risers.

Melting practice: Cupola, charge calculations. Casting cleaning and casting defects, Fettling, defects in

castings and their remedies, methods of testing of castings for their soundness.

Unit III Special Casting Processes: Shell molding, precision investment casting, permanent mold casting, die

casting, centrifugal casting, continuous casting,

Unit IV Metal Forming Processes: Nature of plastic deformation, hot working and cold working .Principles of

rolling, roll passes, roll pass sequences. Forging: Forging operations, smith forging, drop forging, press

forging, forging defects.

Unit V Extrusion and other processes: Extrusion principle, hot extrusion, cold extrusion, wire drawing, swaging,

tube making. Sheet metal operations: Press tools operations, hearing action, drawing dies, spinning,

bending, stretch forming, embossing and coining.

Unit VI Gas and Arc Welding: Classification: oxy- acetylene welding equipment and techniques. Electric arc

welding: Electrodes, manual metal arc welding, inert gas shielded arc welding, tungsten inert gas

welding (TIG), metal inert gas welding(MIG), submerged arcwelding (SAW).

Unit VII Resistance Welding: Principles, resistance spot welding, resistance seam welding, upset welding, flash

welding,

Unit VIII Other Welding Processes: Introduction thermit welding, electro slag welding, electron beam

welding, forge welding, friction welding, diffusion welding, brazing and soldering.