1. ENGINEERING GRAPHICS By R.Nathan Assistant Professor Department of Mechanical Engineering C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012

2. UNIT – 1 “FREE HAND SKETCHING” Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012

3. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 FREE HAND SKETCHING SOLIDS 1.Solid is a three dimensional object 2.It has three dimensions (Length, Breadth and Height /Thickness) 3.It is bounded by plane or curved surfaces 4.Atleast 2 orthographic views are required to represent a solid on a flat surface 5.Some times additional views are necessary to describe a solid completely

4. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 FREE HAND SKETCHING Solids can be divided into 2 main groups viz; 1.POLYHEDRA -solids bounded by plane surfaces such as Prisms, Pyramids etc… 2.SOLIDS OF REVOLUTION -solids formed by revolution of linear figures such as cylinder,cone and sphere

5. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 FREE HAND SKETCHING

6. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 FREE HAND SKETCHING

7. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 CUBE

8. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 CYLINDER, CONE & SPHERE

9. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 FRUSTUM

10. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 OBLIQUE SOLIDS

11. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 PROJECTION

12. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 TYPES OF PROJECTION

13. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 ORTHOGRAPHIC PROJECTION DEFINITION 1.Method of representing the exact shape of an object in two or more views, on planes always “at right angles to each other” by edtending perpendiculars from the object to the planes. 2.It is universally used in engineering drawing 3.The word “ORTHOGRAPHIC” means to draw at right angles 4.Different views of an object are obtained to describe with all dimensions 5. It is classified into 4 categories according to the orientation of the object. But only I st angle and III rd angle projections are used in engineering drawing.

14. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 ORTHOGRAPHIC VIEWS

15. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 ORTHOGRAPHIC DRAWINGS

16. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 DESIGNATION OF ORTHOGRAPHIC VIEWS

17. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 FIRST ANGLE PROJECTION

18. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 FIRST ANGLE PROJECTION SYMBOL

19. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 THIRD ANGLE PROJECTION

20. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 THIRD ANGLE PROJECTION SYMBOL

21. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 FREE HAND SKETCHING

22. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 FREE HAND SKETCHING

23. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 FREE HAND SKETCHING

24. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 FREE HAND SKETCHING

25. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 FREE HAND SKETCHING

26. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012

27. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012

28. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012

29. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 EXERCISES

30. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 EXERCISES

31. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 EXERCISES

32. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 EXERCISES

33. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 EXERCISES

34. Engineering Graphics Lecture Notes C.R.ENGINEERING COLLEGE Alagarkovil, Madurai - 625301 I - SEMESTER 28.09.2012 EXERCISES