JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre-requisites

Engineering graphics

Course objectives: To familiarize with the standard conventions for different materials and machine parts in working drawings. To make part drawings including sectional views for various machine elements. To prepare assembly drawings given the details of part drawings. To Learn the concept of fluid system and analyzing the applications of fluid systems in power transmission. To prepare CAD 2D and 3D part models using AUTOCAD and Solid works.

Course Outcomes:

• Preparation of engineering and working drawings with dimensions and bill of material during design and development. Developing assembly drawings using part drawings of machine components.
• Conventional representation of materials, common machine elements and parts such as screws, nuts, bolts, keys, gears, webs and ribs.
• Types of sections – selection of section planes and drawing of sections and auxiliary sectional views. Parts not usually sectioned.
• Methods of dimensioning, general rules for sizes and placement of dimensions for holes, centers, curved and tapered features.
• Types of Drawings – working drawings for machine parts. Title boxes, their size, location and details - common abbreviations and their liberal usage.
• Understand the use of hydraulic and pneumatic systems and design of hydraulic and Pneumatic circuits for industrial applications.
• Preparation of 2D Drawings and 3D Basic solid models using CAD. Machine Drawing Conventions: Need for drawing conventions – introduction to BIS conventions Conventional representation of materials, common machine elements and parts such as screws, nuts, bolts, keys, gears, webs and ribs. I. Drawing of Machine Elements and simple parts Selection of Views, additional views for the following machine elements and parts with easy Drawing proportions.
• 1) Popular forms of Screw threads, bolts, nuts, stud bolts, tap bolts, set screws and gears.
• 2) Keys, cotter joints and knuckle joint.
• 3) Riveted joints for plates.
• 4) Shaft coupling: Universal coupling, Oldhams coupling.
• 5) Journal, pivot and collar and foot step bearings. II. Assembly Drawings: Drawings of assembled views, detailing for the part drawings of the following using conventions and easy drawing proportions.
• 1) Engine parts – stuffing box, Eccentric, Petrol Engine connecting rod, Piston assembly.
• 2) Machine tool parts: Tail stock, Tool Post, Machine Vice.
• 3) Other machine parts - Screws jack, Plummer block.
• 4) Valves: Steam stop valve, Ramsbottom safety valve, blow-off cock valve. R18 B.TECH MECHATRONICS III. Introduction to Industrial fluid system: Circuit Drawings for Double Acting Hydraulic Cylinder, Single Acting / Double Acting Pneumatic Cylinder with following Valves
• 1) Direct Control Valves: 3/2, 4/2, 4/3, 5/2 Direction Control Valve.
• 2) Flow Control Valves: Ball Valve, check Valve, Butterfly valve.
• 3) Pressure control Valves: Pressure relief Valve, unloading valve, sequence valve. IV. Introduction to Computer Aided Graphics: (For internal Evaluation weightage only) Fundamentals of 2D construction- line, circular, polyline, spline, polygon, simple problems, conversion of simple pictorial views into orthographic views.

TEXT BOOKS:

• 1. Machine Drawing – Ajeet Singh, TMH Publications
• 2. Machine Drawing –K.L. Narayana, P. Kannaiah & K. Venkata Reddy / New Age/ Publishers
• 3. Machine Drawing – N.D. Bhatt.
• 4. Engineering Graphics with Auto CAD – James D. Bethune – PHI 2009 Edition.
• 5. Oil Hydraulic Systems: Principles & Maintenance – S.R. Majundar – Mc. Grawhill Publication

REFERENCE BOOKS:

• 1. Machine Drawing – P.S.Gill.
• 2. Machine Drawing – Luzzader
• 3. Machine Drawing - Rajput R18 B.TECH MECHATRONICS