JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Overview

PART - A Machine Drawing Conventions: Need for drawing conventions – introduction to ISI conventions - Conventional representation of materials, common machine elements such as screws, nuts, bolts, keys, gears, webs, ribs. 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 and their liberal usage. Types of Drawings – working drawings for machine parts.

Drawing of Machine Element: Simple parts - Selection of Views, additional views for the following machine elements and parts with every 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. Shaft coupling, spigot and socket pipe joint. Journal, pivot and collar and foot step bearings.

PART- B Assembly Drawings: Drawings of assembled views for the part drawings of the following using conventions and easy drawing proportions. Engine parts – stuffing boxes, cross heads, Eccentrics - Connecting Rod – Piston Assembly. Machine tool parts: Tail stock, Tool Post, Machine Vices - Screws jacks- Plummer block. Valves: Spring loaded safety valve, feed check valve and air cock.

Note

First angle projection to be adopted. The student should be able to provide working

drawings of actual parts.

Question Paper: Should have 25% for Part A - 3 out of 4 Questions and 75% for Part B- No choice one assembly figure

TEXT BOOK:

• 1. Machine Drawing /K. L. Narayana/ New Age International Publishers
• 2. Textbook of Machine Drawing/K.C. John/PHI/Eastern Economy Edition

REFERENCE BOOKS:

• 1. Machine Drawing / P.S.Gill.
• 2. Machine Drawing / Junnarkar N.D./ Pearson Edu.
• 3. Machine Drawing/Bhattacharya/Oxford University Press
• 4. Machine Drawing/N.D. Bhat/ Charotar
• 5. A Textbook of Machine Drawing/R. K. Dhawan/ S. Chand.