MECHANICAL DRAFTING
Engineering language is expressed in drawing & drafting .Its a means of communicating with dimensions ,proportions , scale of machine or a building describing its details like the shape , size and section by a verbal or written language is very difficult henceforth Graphic language is used to express drawings .People who do these measured drawings are called as Draftsmen.Mechanical draftsman play a key role in the civil design industry .They do the 2d & 3d modeling of the buildings. They get well paid as a fresher and with experience.
Syllabus

I. Mechanical draftsman Introduction :-

  • Free hand sketching .
  • Use of drawing instruments and materials .
  • Drawing conventional lines according to isi code. Folding of sheets .
  • Draw 1st & 3rd angle projection of points, lines, plain figures, solids & simple machine components
  • 2d & 3d drafting.
     

    • II. Mechanical Drafting : Detailing

  • Draw different types of sectional views and dimensioning their drawings
  • Draw isometric oblique and perspective projection of simple objects
  • Draw inter-penetration curves and developed simple objects
  • Draw temp. Fasteners – screws threads, bolts, nuts, washers, locking devices
  • Machine screws, cap screws, studs, set screws, foundation bolts, circlips, keys, cotters, and pins
  • Draw types of rivets and riveted joints.
  • Use of important pattern maker’s tools, making of simple patterns, use of molding tools and preparation of simple mould
  • Use blacksmiths hand tool, forging of simple jobs
  • Use fitter hand tools and measuring instruments
  • Carry out simple operations on shaping, and milling machines
  • Carry out simple operation on lathe
  • Use of sheet metal work and tools, elementary knowledge of gas and gas welding.
  • Elementary knowledge of electrician trade and to be able to identify the different parts of i.c. engine
  • Prepare free hand sketches from exiting machine parts. Inking and colouring the drawing. Tracing a drawing on both tracing paper and cloth.
  • Draw details & assembly drawings of machine parts like coupling bearing, pulleys etc
     

    • III. Mechanical Drafting : Working Drawings

  • Prepare piping drawings, main line layout as done previously
  • Prepare working drawings of different types of gears.
  • Prepare details and assembly drawings of important machine parts and engine parts
  • Draw working drawings of jigs, fixtures, gauges, press tools
  • Draw welding drawings, use of welding symbols on drawings
  • Draw foundations drawings for machinery
  • Draw and sketch assembly drawing of bench drilling and slotting machines.
  • To prepare working drawing of machine parts and components independently taking sketches from the shop floor
  • Making working drawing of projects.

    • Familiarization with :

    Is-1444(drg. Board)

    Is-1360 (t-sqr.)

    Is-1561(set sqr.)

    Is-696 (code of engg.drg.)

    • Preparation of detailed drawings from assembly. Drawings of simple machine parts such as : tool post of shaping 

      • IV. Mechanical draftsman software’s

    • Auto cad.


      • V. Live projects for Mechanical draftsman (2 nos)

    • Mechanical drafting fixture for drilling hole.
    • Mechanical drafting of milling fixture.
    • Mechanical drafting of north light
    • Mechanical drafting of Valve