18AU46 Computer Aided Machine Drawing syllabus for AU


Part A
Unit-1 Introduction 0 hours

Introduction:

Review of graphic interface of the software. Basic sketching commands and navigational commands. Starting a new drawing sheet. Sheet sizes. Naming a drawing. Drawing units, grid and snap.

 

Sections of Solids:

Sections of Pyramids, Prisms, Cubes, Tetrahedrons, Cones and Cylinders resting only on their bases (No problems on, axis inclinations, spheres and hollow solids). True shape of sections.

 

Orthographic views:

Conversion of pictorial views into orthographic projections of simple machine parts with or without section. (Bureau of Indian Standards conventions are to be followed for the drawings) Hidden line conventions. Precedence of lines.

Unit-2 Thread forms 0 hours

Thread forms:

Thread terminology, forms of threads – BSW Thread, Sellers thread, ISO Metric thread, square and Acme thread. Conventional representation of threads.

 

Fasteners:

Hexagonal headed bolt and nut with washer (assembly), square-headed bolt and nut with washer (assembly). Types of Bolt heads, special types of nuts, locking of nuts, Studs, set screws, grub screws.

Part B
Unit-3 Keys, cotter and knuckle joints 0 hours

Keys, cotter and knuckle joints:

Types of Keys, Cotter and knuckle Joints

 

Riveted Joints: lap joints-

single and double riveted lap joints, butt joints with single/double cover straps (Chain and Zigzag, using snap head rivets).

Unit-4 Automotive components 0 hours

Automotive components:

Spark plug, IC Engine valve, Rocker arm, Cylinder liner, Stub-axle, Oldham’s coupling and universal coupling (Hooks’ Joint)

 

Couplings:

Split Muff coupling, Protected type flanged coupling.

Part C
Unit-5 & 0 Module-5 0 hours

Assembly drawing of following machine parts (3D parts to be created and assembled and then getting 2D drawing with required views, along with 3D part drawings).

1. Plummer block (Pedestal Bearing)

2. Petrol Engine piston

3. I.C. Engine connecting rod

4. Screw Jack

5. Single cylinder crank shaft

 

Course Outcomes:

At the end of the course the student will be able to:

  • Use tools of drafting and modeling software
  • Draw the sections of solids, orthographic views of simple machine parts using software
  • Sketch and explain various thread forms and their application.
  • Calculate parameters related to riveted joints and sketch them.
  • Prepare assembly drawing from the list of components.
  • Create solid models and draw the sectional views of automotive systems.

 

Internal assessment: 40 Marks

All the sheets should be drawn in the class using software. Sheet sizes should be A3/A4. All sheets must be submitted at the end of the class by taking printouts.

 

Scheme of Examination:

Two questions to be set from each Part. Student has to answer one question from each Part.

PART-A: 1x20 = 20Marks

PART-B: 1x20 = 20Marks

PART-C: 1x60 = 60 Marks

Total = 100 Marks

 

Textbook/s

1 Machine Drawing K. R. Gopala Krishna Subhash Publication.

2 A Primer on Computer Aided Machine Drawing Published by VTU

 

Reference Books

3 A Text Book of Computer Aided Machine Drawing S. Trymbaka Murthy CBS Publishers, New Delhi 2007

4 Machine Drawing with Auto CAD Goutam Purohit & Goutham Ghosh 1st Indian print Pearson Education, 2005

5 Machine Drawing N. Siddeshwar, P. Kanniah, V. V. S. Sastri Tata McGrawHill, 2006

Last Updated: Tuesday, January 24, 2023

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