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SYLLABUS

UNIT-I

Machine Drawing Conventions Need for drawing conventions- introduction to IS conventions, Conventional representation of material, common machine elements and parts such as screws, nuts, bolts, keys, gears, webs, ribs. Parts not usually sectioned. Methods of dimensioning, general rules for sizes and placement of dimensions for holes, centers, curved and tapered features. Title boxes, their size, location and details-common abbreviations & their liberal usage

UNIT-II

Drawing of Machine Elements and simple parts Selection of Views, additional views for the following machine elements and parts with drawing proportions: Popular forms of Screw threads, bolts, nuts, stud bolts, tap bolts, set screws, Keys, cottered joints and knuckle joint, Rivetted joints for plates, flanged &protected flanged joint. Shaft coupling, spigot and socket pipe joint. Journal, and foot step bearings.

UNIT-III

Assembly Drawings Drawings of assembled views for the part drawings of the following : Engine parts- stuffing boxes, cross heads, Eccentrics, Petrol Engine-connecting rod, piston assembly. Other machine parts- Screw jack, Machine Vice, single tool post. Valves: Steam stop valve, feed check valve. Non return valve.