NPTEL

Transcription

1 NPTEL Syllabus Machine Drawing - Video course COURSE OUTLINE Technical Graphics is used to communicate the necessary technical information required for manufacture and assembly of machine components. These drawings follow rules laid down in national and International Organizations for Standards (ISO). Hence the knowledge of the different standards is very essential. Students have to be familiar with industrial drafting practices and thorough understanding of production drawings to make themselves fit in industries. The following topics have been covered to fulfill the above objectives. Classification of Machine Drawings, Principles of Drawings, Sectioning, Dimensioning, Limits, Fits and Tolerance, Symbols and Conventional Representation, Screw Fasteners, Key Joints, Coupling and its Types, Riveted Joints, Welded Joints, Structural Applications, Assembly Drawings, Production Drawings, Reproduction of Drawing, Introduction of Computer Aided Drafting, Introduction of Solid 3D Modeling. COURSE DETAIL NPTEL Mechanical Engineering Coordinators: Prof. N. Siva Prasad Department of Mechanical EngineeringIIT Madras Lecture No. Topics 1 Introduction Need of Graphical Language Importance Machine Drawing Tools (from Instruments to Current Softwares) 2 Projections Designation Relative position of views Examples 3 Classification of Machine Drawings (with examples) Assembly Drawing Part Drawing Detailed Drawing Catalogues Drawing 4 Classification of Machine Drawings (with examples) Drawing for Instruction Manuals Schematic Representation

2 Patent Drawing 5 Principles of Drawings Scales as per ISO standards, eg. A3 x 3 (420 x891) Importance of Title Block and Part list Lines types (Lines used in Machine Drawings) 6 Sectioning Cutting Planes and Section Hatching Lines Half Sections Aligned Sections Offset Sections 7 Sectioning Revolved Removed Sections Local Sections Successive Sections Thin Sections 8 Dimensions (with examples) Principle of Dimensioning Counter Sink, Counter Bores Spot Faces 9 Dimensions (with examples) Chamfers Screw Threads Tapered Features 10 Limits, Fits and Tolerance Definitions Classifications of Fits System of Fits` Computations Selection of Fits Method of Indicating Fits on Drawings

3 11 Limits, Fits and Tolerance Tolerance Grade Computations of Tolerance Positions of Tolerance Fundamental of Deviations Shaft and Hole Terminology Method of Placing Limit Dimensions 12 Limits, Fits and Tolerance Need of Geometrical Tolerance Geometrical Characteristics of Symbols Indication of MMC Interpretation of Indication of Geometrical Tolerance 13 Conventional Representations Common features, Springs, Gear Assemblies 14 Conventional Representations Materials Interrupted views and Braking of Shaft, Pipe, Bar Surface finishing & Machining Symbols 15 Abbreviations and Symbols 16 Screwed Fastenings Screw Thread Nomenclature Threads Form Form of V Threads Form of Square Threads Conventional representations 17 Screwed Fastenings Types of Bolts Designation Types of Nuts Types of Screw Designation of Bolted Joints Stud Joints Types of Nut Locking Arrangements

4 Special Types of Bolts and Nuts. 18 Key Joints Types of Key joints Type of Cotter Joints Types of Pin Joints and knuckle Joints 19 Riveted Joints Introduction Rivet and Riveting Classification of Rivet Terminology of Riveted Joint Types of Joints 20 Welded Joints Introduction of Welding Process Types of Welded Joints Representation of Welds Symbols and its conventions 21 Structural Applications 22 Pipes and Pipe Joints General discussions Types of Pipe Joints Piping Layout and Conventions 23 Pulleys Applications of Pulleys Types of Pulleys 24 Couplings Applications of Couplings Types of Couplings Working Principles 25 Assembly Drawings Introduction Types of Assembly Importance of BOM Assembly procedures

5 26 Assembly Drawings (Examples) Assembly of Engine Parts: 10 Assembly of Machine Tools Parts: 5 27 Production Drawings Definitions Difference with Normal Drawings Method of amendment of Corrections 28 Production Drawings Examples 3 Nos. 29 Reproduction of Drawing Blue printing Ammonia Printing Xeroxing Printing Plotting 30 Introduction of Computer Aided Drafting Computer Aided Drafting and Design Advantages of Computer Aided Drafting and Design CAD Softwares 31 Introduction of Solid 3D Modeling References: 1. Bertoline, Wiebe, Miller, Nasma., Technical Graphics Communication, IR WIN Graphic Series 2. William P. Spence, Engineering Graphics, Printice - Hall Inc, Engle Wood Cliff 3. S. Bogolyubov. A. Voinov., Engineering Drawing, Van Nostr and Reinhold Company 4. Brain Griffiths., Engineering Drawing for Manufacture, Kogan Page Science, USA 5. Hart. K R, Engineering Drawing with Problems and Solutions, Hodder and Stoughton, London Sydney Auckland 6. David L., Goetsch Williams Chaulk John A., Nelson, Technical Drawing (Drafting and Design) Savee Informatics. 7. D.E. Hewitt., Engineering Drawing and Design for Mechanical Technicians, The Macmillan Press Ltd, London A joint venture by IISc and IITs, funded by MHRD, Govt of India

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