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Revised scheme for B.Tech. - Punjab Technical University

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PE-209 MANUFACTURING PROCESS –I<br />

PTU/BOS/ME/101/10-06-2005/BATCH-2003<br />

Internal Marks: 40 L T P<br />

External Marks: 60 3 0 0<br />

Total Marks: 100<br />

CASTING PROCESSES<br />

Introduction to metal casting types of patterns, their materials and allowances.<br />

Moulding materials: Moulding sand compositions and moulding sand properties, sand<br />

testing types of moulds, moulding machines cores core sands, types of cores, core<br />

banking elements of gating system, and risers and their design. Cupola and its<br />

operation charge calculations types of furnaces,<br />

Casting processes: sand casting, shell mould casting investment casting, permanent<br />

mould casting, full mould casting, vacuum casting. Die casting. Centrifugal casting,<br />

continuous casting.<br />

Casting defects, their causes and remedies.<br />

Metallurgical considerations in casting, Solidification of metals and alloys, directional<br />

solidification, segregation, nucleation and grain growth, critical size of nucleus,<br />

casting<br />

of copper alloys.<br />

Cleaning and finishing of castings, Testing and Inspecting of castings.<br />

WELDING<br />

Welding introduction and classification of welding, processes, welding terminology,<br />

general principles, welding positions, filler metals.<br />

Gas welding and gas cutting, principle, oxyacetylene welding equipment<br />

oxyhydrogen<br />

welding. Flame cutting.<br />

Electric are welding. Principle, equipment, types- MIG, TIG submerged arc and<br />

others.<br />

Welding electrodes, classification and selection of electrodes, welding arc and its<br />

characteristics, arc stability, arc blow. Thermal effects on weldment. Heat affected<br />

zone<br />

grain size and its control.<br />

Resistance welding- principle and their types i.e. spot, seam, projection, upset and<br />

flash<br />

Thermit welding, electro slag welding, friction welding, plasma are welding electron<br />

beam welding, atomic hydrogen hydrogen welding. Basic considerations in joint<br />

design,<br />

Welding defects, their cases and remedies.<br />

Brazing, braze welding and soldering.<br />

Books<br />

1. Heine, R.W. C.R. Loper and P.C. Rosenthal, Principles of metal casting Mc<br />

Graw Hill New York- 1967<br />

2. Welding <strong>Tech</strong>nology by R.S. Parmar, Khanna Publishers.

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