JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Overview

Course Overview: Machine Drawing gives representation of a machine component or machine by lines according to certain set rules. Machine drawing generally gives all the external and internal details of the machine components from which it can be manufactured. The machining symbols, tolerances, bill of material, etc. are specified on the drawing when it is being manufactured, then it is called production drawing.

Course Objectives:

• 1. Understand the different steps in producing drawings according to bureau of Indian standards (B.I.S.) as per SP:46 (1988)
• 2. Understand the application of industry standards and techniques applied in Machine Drawing
• 3. Comprehend general projection theory, with an emphasis on the use of orthographic projection to represent three-dimensional objects in two-dimensional views.

Course Outcomes:

• 1. After going through this course, the student shall be able to understand the drawings of mechanical components and their assemblies along with their utility for design and development of mechanical system.
• 2. Work effectively with engineering and science teams as well as with multidisciplinary designs.
• 3. Skillfully use modern engineering tools and techniques such as CAD- CAM softwares for mechanical engineering design, analysis and application 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. Riveted joints for plates. Shaft coupling, spigot and socket pipe joint. Journal, pivot and collar and foot step bearings. R16 B.TECH MSNT. 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 BOOKS:

• 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 R16 B.TECH MSNT.