17AU45 Computer Aided Machine Drawing syllabus for AU

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.

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.

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).

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.

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

6. Machine vice

Course outcomes:

After completion of above course, students will be able to:

• Use the Solid Edge software for drawing and solid modeling.
• Sketch the solutions of the sections of solids, determine the inclination of the cutting plane when true shape of section of an object is given.
• Sketch and draw the orthographic views of simple machine parts (top view, front view, side view) using first angle projection.
• Sketch and draw the sectional views of simple machine parts.
• Sketch and draw ISO metric threads, Square, ACME & BSW forms of threads using conventional representation.
• Distinguish between temporary and permanent joints and sketch and draw the different types of keys.
• Sketch and draw two views of different types of riveted joints
• Sketch and draw two views of different automotive components, couplings and joints
• Create solid models of different parts and assemble them and draw their sectional views using Solid Edge software.
• Prepare assembly drawings along with their bill of material.

Text Books:

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

2. A Primer on Computer Aided Machine Drawing- Published by VTU, Belgaum.

3. Machine Drawing- N. D. Bhat& V. M. Panchal

4. Automobile Engineering Drawing- R. B. Gupta, SatyaPrakashan, New Delhi.

Reference Books:

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

2. Machine Drawing with Auto CAD- GoutamPurohit&GouthamGhosh, 1st Indian print Pearson Education, 2005

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

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: 1x15 = 10Marks

PART-B: 1x15 = 10Marks

PART-C: 1x30 = 40 Marks

               Total = 60 Marks