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# Orthographic Projections by shelke

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### Orthographic Projections by shelke

1. 1. Orthographic Projections Ashish Vishnu Shelke Lecturer, Mechanical Engineering Department PCP,Pune :+919960818069
2. 2. Sticking to syllabus Theory Reference planes, types of orthographic projections – First angle projections, Third angle projections, methods of obtaining orthographic views by First angle method, Sectional orthographic projections – full section, half section, offset section.Practical:To draw two principal views, one sectional view for two objects.
3. 3. What does the word Orthographic Mean? Ortho – 90 Degrees or right angle Graphic – to draw or a picture To draw pictures 90 degrees from each other.Orthographic Projections 3 views of an object that are 90 degrees to each other Usually the Top, Front, and Right Side views are usedWhy Orthographic Projections?Shows the true size and shape of the features of an objectProvide certain information on how the object is to be made.
4. 4. 3 Methods of Drawing Orthographic ProjectionsFirst Angle Projections Method Third Angle Projections Method Here views are drawn Here views are drawn by placing object by placing object in 1st Quadrant in 3rd Quadrant.( Fv above X-y, Tv below X-y ) SYMBOLIC ( Tv above X-y, Fv below X-y ) PRESENTATION OF BOTH METHODS WITH AN OBJECT STANDING ON HP ( GROUND) ON IT’S BASE. NOTE:- HP term is used in 1st Angle method & For the same Ground term is used in 3rd Angle method of projections
5. 5. How do I draw this symbol?The recommended proportions for the symbol are as follows….
6. 6. ORTHOGRAPHIC PROJECTIONS { MACHINE ELEMENTS } OBJECT IS OBSERVED IN THREE DIRECTIONS. THE DIRECTIONS SHOULD BE NORMAL TO THE RESPECTIVE PLANES.AND NOW PROJECT THREE DIFFERENT VIEWS ON THOSE PLANES. THESE VEWS ARE FRONT VIEW , TOP VIEW AND SIDE VIEW. FRONT VIEW IS A VIEW PROJECTED ON VERTICAL PLANE ( VP ) TOP VIEW IS A VIEW PROJECTED ON HORIZONTAL PLANE ( HP ) SIDE VIEW IS A VIEW PROJECTED ON PROFILE PLANE ( PP ) FIRST STUDY THE CONCEPT OF 1 ST AND 3 RD ANGLE PROJECTION METHODS
7. 7. PATTERN OF PLANES & VIEWS (First Angle Method) 2 THIS IS A PICTORIAL SET-UP OF ALL THREE PLANES. ARROW DIRECTION IS A NORMAL WAY OF OBSERVING THE OBJECT. BUT IN THIS DIRECTION ONLY VP AND A VIEW ON IT (FV) CAN BE SEEN. THE OTHER PLANES AND VIEWS ON THOSE CAN NOT BE SEEN. Y PROCEDURE TO SOLVE ABOVE PROBLEM:- TO MAKE THOSE PLANES ALSO VISIBLE FROM THE ARROW DIRECTION, A) HP IS ROTATED 900 DOUNWARDX B) PP, 900 IN RIGHT SIDE DIRECTION. THIS WAY BOTH PLANES ARE BROUGHT IN THE SAME PLANE CONTAINING VP. Click to view Animation On clicking the button if a warning comes please click YES to continue, this program is safe for your pc. VP PP Y FV LSV X Y X TV HP ACTUAL PATTERN OF PLANES & VIEWS HP IS ROTATED DOWNWARD 900 PP IS ROTATED IN RIGHT SIDE 90 0 OF ORTHOGRAPHIC PROJECTIONS AND AND DRAWN IN BROUGHT IN THE PLANE OF VP. BROUGHT IN THE PLANE OF VP. FIRST ANGLE METHOD OF PROJECTIONS
8. 8. FIRST ANGLE FOR T.V. PROJECTION IN THIS METHOD,HE OBJECT IS ASSUMED TO BESITUATED IN FIRST QUADRANT MEANS ABOVE HP & INFRONT OF VP. OBJECT IS INBETWEEN OBSERVER & PLANE. VP PP FV LSV . .V FO S R X Y R F. FO V. TV HP ACTUAL PATTERN OF PLANES & VIEWS INFIRST ANGLE METHOD OF PROJECTIONS
9. 9. THIRD ANGLE FOR T.V. PROJECTION IN THIS METHOD, THE OBJECT IS ASSUMED TO BE SITUATED IN THIRD QUADRANT ( BELOW HP & BEHIND OF VP. )PLANES BEING TRANSPERENT AND INBETWEEN OBSERVER & OBJECT. TV X Y LSV FV ACTUAL PATTERN OF PLANES & VIEWS OF . FOTHIRD ANGLE PROJECTIONS S.V R F. F OR V.
10. 10. FOR T.V. 1 ORTHOGRAPHIC PROJECTIONS FRONT VIEW L.H.SIDE VIEW FO R . F. V. S.V R FO x yPICTORIAL PRESENTATION IS GIVEN TOP VIEW DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
11. 11. FOR T.V. 2 ORTHOGRAPHIC PROJECTIONS FRONT VIEW L.H.SIDE VIEW X Y FO . R S .V F. R V.FO TOP VIEWPICTORIAL PRESENTATION IS GIVEN DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
12. 12. General procedure for sketching orthographic views frompictorial view (isometric view):Step 1: Sketch with free hand, the outline of all the required views with thin line (2H pencil). Step 2: Sketch with free hand, all the visible lines and visible circles in all the required views with thin line (2H pencil).Step 3: Sketch with free hand, all the hidden lines and hidden circles in all the required views with thin line (2H pencil).Step 4: After checking for technical mistakes if any, darken (with free hand) all the visible lines, hidden lines, visible circles/arcs and hidden circles/arcs forming the required views with HB pencil. Step 5: Lettering (both alphabets and numbers) should be done with free hand.
13. 13. Example:Draw FV, TV, and SV of the object shown
14. 14. Solution:Step :1 Step:2Step:3 Step:4
15. 15. Step:5The complete solution for the example is, Note: Visible Parts should be drawn with continuous lines of 0.6 mm thickness Hidden parts should be drawn with dotted lines of 0.3 mm thickness Dimensions line are thin continuous lines of 0.3 mm thickness and arrow head filled with 1.5 mm heights and 3 mm length.
16. 16. Dimensioning Methods: Dimensions are represented on a drawing using one of two systems, unidirectional or aligned. The unidirectional method means all dimensions are read in the same direction. The aligned method means the dimensions are read in alignment with the dimension lines or side of the part, some read horizontally and others read vertically.
17. 17. FOR T.V. 3 ORTHOGRAPHIC PROJECTIONS FRONT VIEW L.H.SIDE VIEW FO . R S.V FO R F. V. X Y TOP VIEWPICTORIAL PRESENTATION IS GIVEN DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
18. 18. FOR T.V. 5 ORTHOGRAPHIC PROJECTIONS FRONT VIEW L.H.SIDE VIEW . S .V R FO FO R F. V. X Y TOP VIEWPICTORIAL PRESENTATION IS GIVEN DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
19. 19. 4 FOR T.V. ORTHOGRAPHIC PROJECTIONS FRONT VIEW L.H.SIDE VIEW X Y . FO S. V R F. R V.FO TOP VIEW PICTORIAL PRESENTATION IS GIVEN DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
20. 20. 7 FOR T.V. ORTHOGRAPHIC PROJECTIONS FRONT VIEW L.H.SIDE VIEW FO R F. V. . S .V R X Y FOPICTORIAL PRESENTATION IS GIVEN TOP VIEW DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
21. 21. PICTORIAL PRESENTATION IS GIVEN ORTHOGRAPHIC PROJECTIONS 20 DRAW FV AND TV OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD 30 FOR T.V. FV RECT. SLOT 10 50 35 10 X Y 20 D TV 60 D 30 D FO R TOP VIEW F. V.
22. 22. 6 FOR T.V. ORTHOGRAPHIC PROJECTIONS FRONT VIEW L.H.SIDE VIEW . FO X Y S .V R R F.FO V. TOP VIEWPICTORIAL PRESENTATION IS GIVEN DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
23. 23. STUDY 8 FOR T.V. ZILLUSTRATIONS ORTHOGRAPHIC PROJECTIONS FRONT VIEW 50 X Y 20 25 FO R F. V. 25 20 TOP VIEW PICTORIAL PRESENTATION IS GIVEN DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
24. 24. 9 FOR T.V. ORTHOGRAPHIC PROJECTIONS FRONT VIEW L.H.SIDE VIEW X Y FO . R F. S. V V. RFO TOP VIEW PICTORIAL PRESENTATION IS GIVEN DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
25. 25. 10 FOR T.V. ORTHOGRAPHIC PROJECTIONS FRONT VIEW L.H.SIDE VIEW X Y . R S.VFO FO R F. V. PICTORIAL PRESENTATION IS GIVEN TOP VIEW DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
26. 26. FOR T.V. 11 ORTHOGRAPHIC PROJECTIONS FRONT VIEW L.H.SIDE VIEW FO R X Y F. V. . S .V RFO TOP VIEW PICTORIAL PRESENTATION IS GIVEN DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
27. 27. 12 FOR T.V. ORTHOGRAPHIC PROJECTIONS FRONT VIEW L.H.SIDE VIEW X Y . FO R S.V F. R V.FO PICTORIAL PRESENTATION IS GIVEN TOP VIEW DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
28. 28. STUDY 13 ZILLUSTRATIONS FOR T.V. ORTHOGRAPHIC PROJECTIONS 35 FV 35 10 x y 10 20 30 FO R 40 F. V. 70 TV O PICTORIAL PRESENTATION IS GIVEN DRAW FV AND TV OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
29. 29. STUDY 14 Z ILLUSTRATIONS FOR T.V. ORTHOGRAPHIC PROJECTIONS FV 30 10 30 SV 30 10 30 x y . FO S. V R R F.FO V. ALL VIEWS IDENTICAL TV PICTORIAL PRESENTATION IS GIVEN DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
30. 30. STUDY 15 Z ILLUSTRATIONS ORTHOGRAPHIC PROJECTIONS FOR T.V. ALL VIEWS IDENTICAL FV SV x y 10 40 60 . FO S.V R F.OR V. 40 TV 60 PICTORIAL PRESENTATION IS GIVEN DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
31. 31. FOR T.V. ORTHOGRAPHIC PROJECTIONS 16 ALL VIEWS IDENTICAL FV SV x y 10 . FO S .V R R F. V.FO 40 60PICTORIAL PRESENTATION IS GIVEN 40 TOP VIEW DRAW THREE VIEWS OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD 60
32. 32. 17 ORTHOGRAPHIC PROJECTIONS FRONT VIEW L.H.SIDE VIEW 30 SQUARE 40 20 50 FO . R 20 S. V F. X V. 10 Y RFO 30 O 60 F.V. S.V. PICTORIAL PRESENTATION IS GIVEN DRAW FV AND SV OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
33. 33. FOR T.V. ORTHOGRAPHIC PROJECTIONS 18 FV 40X 10 Y O 30 D 45 FO R F. V. O 10 50 PICTORIAL PRESENTATION IS GIVEN DRAW FV AND TV OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD 80 TV
34. 34. 19 FOR T.V. ORTHOGRAPHIC PROJECTIONS FV 40X O 10 Y 100 10 25 FO R TV F. 10 30 10 25 V. 30 R O 20 D PICTORIAL PRESENTATION IS GIVEN DRAW FV AND TV OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
35. 35. 21 ORTHOGRAPHIC PROJECTIONS 10 25 15 25 40 10 25 FO . R S.V F. V. 25 RFO O O 80 25 F.V. S.V. PICTORIAL PRESENTATION IS GIVEN DRAW FV AND SV OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
36. 36. FOR T.V. 22 ORTHOGRAPHIC PROJECTIONS 450 30 FV 40 X Y 30 D FO R F. V. 40 TV OPICTORIAL PRESENTATION IS GIVEN 15 DRAW FV AND TV OF THIS OBJECT 40 BY FIRST ANGLE PROJECTION METHOD
37. 37. 23 ORTHOGRAPHIC PROJECTIONS FO HEX PART R F. 30 V. 20 20 . S.V 40 20 RFO O 50 20 15 O 30 100 60PICTORIAL PRESENTATION IS GIVEN FRONT VIEW L.H.SIDE VIEW DRAW FV ABD SV OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
38. 38. FOR T.V. ORTHOGRAPHIC PROJECTIONS 24 20 40 FRONT VIEW F.V. 30 10 X Y O 10 30 FO R F. 10 V. 30 O 80PICTORIAL PRESENTATION IS GIVEN T.V. TOP VIEW DRAW FV AND TV OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
39. 39. 25 ORTHOGRAPHIC PROJECTIONS 10 10 15 25 25X Y O 50 10 . FV LSV S .V FO R R FO F. V. PICTORIAL PRESENTATION IS GIVEN DRAW FV AND LSV OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD
40. 40. PICTORIAL PRESENTATION IS GIVEN26 DRAW FV AND SV OF THIS OBJECT BY FIRST ANGLE PROJECTION METHOD ORTHOGRAPHIC PROJECTIONS FO R F. V. 30 20 10 20 15 10 15 . S .V R OFO 30 15 15 X Y 50 F.V. LEFT S.V.