mechanical engineering

Arc Welding: The arc welding is a fusion welding process in which the welding heat is obtained from an electric arc struck between the work(...

Electric Resistance Welding It is a type of pressure welding. It is used for joining pieces of sheet metal or wire. The welding heat is obta...

“Pattern”- making, allowances and its types: Pattern: A pattern may be defined as a model of desired casting which when moulded in sand form...

Special Casting Processes: The sand moulds may be used for casting ferrous and non-ferrous metals, but these moulds can be used only once, b...

Moulding sand properties and its classification: The moulding is a process of making a cavity or mould out of sand by means of a pattern. Th...