ME8381 Computer Aided Machine Drawing

ME8381 Computer Aided Machine Drawing
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UNIT I DRAWING STANDARDS & FITS AND TOLERANCES

Code of practice for Engineering Drawing,
BIS specifications
Welding symbols, riveted joints, keys, fasteners
Reference to hand book for the selection of standard components like bolts,
nuts, screws, keys etc.
Limits, Fits
Tolerancing of individual dimensions
Specification of Fits
Preparation of production drawings and reading of part and assembly drawings,
basic principles of geometric dimensioning & tolerancing.

UNIT II INTRODUCTION TO 2D DRAFTING

  • Drawing, Editing, Dimensioning, Layering, Hatching, Block, Array, Detailing, Detailed
    drawing.
  • Bearings - Bush bearing, Plummer block
  • Valves – Safety and non-return valves.

UNIT III 3D GEOMETRIC MODELING AND ASSEMBLY

Sketcher
Datum planes
Protrusion
Holes
Part modeling
Extrusion
Revolve
Sweep
Loft
Blend
Fillet
Pattern
Chamfer
Round
Mirror
Section
Assembly

  • Couplings – Flange, Universal, Oldham’s, Muff, Gear couplings
  • Joints – Knuckle, Gib & cotter, strap, sleeve & cotter joints
  • Engine parts – Piston, connecting rod, cross-head (vertical and horizontal), stuffing box,
    multi-plate clutch
  • Miscellaneous machine components – Screw jack, machine vice, tail stock, chuck, vane
    and gear pump

Note: 25% of assembly drawings must be done manually and remaining 75% of assembly drawings must be done by using any CAD software. The above tasks can be performed manually and using standard commercial 2D / 3D CAD software

OUTCOMES

Upon the completion of this course the students will be able to

  • Follow the drawing standards, Fits and Tolerances
  • Re-create part drawings, sectional views and assembly drawings as per standards

TEXT BOOK

  1. Gopalakrishna K.R., “Machine Drawing”, 22nd Edition, Subhas Stores Books Corner,
    Bangalore, 2013

REFERENCES

  1. N. D. Bhatt and V.M. Panchal, “Machine Drawing”, 48th Edition, Charotar Publishers,2013
  2. Junnarkar, N.D., “Machine Drawing”, 1st Edition, Pearson Education, 2004
  3. N. Siddeshwar, P. Kanniah, V.V.S. Sastri, ”Machine Drawing” , published by Tata Mc
    GrawHill,2006
  4. S. Trymbaka Murthy, “A Text Book of Computer Aided Machine Drawing”, CBS Publishers, New Delhi, 2007