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Note for Machine Drawing - MD By JNTU Heroes

  • Machine Drawing - MD
  • Note
  • Jawaharlal Nehru Technological University Anantapur (JNTU) College of Engineering (CEP), Pulivendula, Pulivendula, Andhra Pradesh, India - JNTUACEP
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SYLLABUS Section A Introduction graphic language, classification of drawing, principle of drawing, IS codes for machine drawing, lines, scales, section dimensioning, standard abbreviation, – Limits , fits and Tolerance ( Dimensional and Geometrical tolerance ) , Surface finish, Gears : Gear terminology, I.S. convention representation of assembly of spur gears, helical gears, bevel gears , worm and worm wheel. Section B Orthographic projections: principle of first and third angle projection, orthographic views from isometric views of machine parts / components. Drawing of sectional views:- Coupling, Crankshaft, Pulley, Piston and Connecting rod, Cotter and Knuckle joint. Riveted Joint and Welded Joint.

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SYLLABUS Free hand sketching: Need for free hand sketching of standard parts and simple machines components. Section C Assembly drawing with sectioning and bill of materials from given detailed drawings of assemblies: Lathe Tail stock, Machine vice, Pedestal bearing Section D Assembly drawing with sectioning and bill of materials from given detailed drawings of assemblies Steam stop valve, Stuffing box, Drill jigs and Milling fixture.

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Introduction- Graphic Language • Engineering drawing has its origin sometime in 500 BC in the regime of King Pharos of Egypt when symbols were used to convey the ideas among people. • Irrespective of language barriers, the drawings can be effectively used in other countries, in addition to the country where they are prepared. • Thus, the engineering drawing is the universal language of all engineers.

Lecture Notes