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# Orthographic projections

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### Transcript of "Orthographic projections"

1. 1. X Fig 2(b) P.P Z2 V.P H.P Z2 Fig 2(a) X Y YY
2. 2. Note : Ist angle means, the block is assumed in front of V.P, above H.P and inside P.P, as in fig. 2(b) where the F.V. is projected on V.P, seen in X direction, T.V. is projected on H.P, seen in Y direction & R.H.S.V. is projected on P.P, seen in Z2 direction
3. 3. It may be noted that :- a) F.V. (X directional view) is on V.P, T.V. (Y directional view) is on H.P, while R.H.S.V (Z2 directional view) is on P.P Fig. 2(c) shows turning of the planes H.P & P.P with their respective hinges, considering plane V.P as fixed plane. b) F.V is within L & H, T.V is within L & D, While R.H.S.V is within H & D. c) The symbol for Ist angle method of projections is placed as shown on fig. 2(c)
4. 4. Fig. 2(c) H.P T.V. L F.V. V.P X Y R.H.S.V. D P. P H
5. 5. Step by step procedure Suggested to prepare Orthographic views (First angle method) for The simple component Shown pictorially in figure
6. 6. 20 60 R40 ISOMETRIC VIEW X
7. 7. R40 20 100 80 ø40 80 20 TOP VIEW FRONT VIEWR.H.S.V SCALE: 1:1 SYMBOL IS NOT MARKED 20 20
8. 8. FIGURE SHOWS ISOMETRIC VIEW OF A SIMPLE OBJECT(WITHOUT DIMENSIONS) SHOW ITS THREE ORTHOGRAPHIC VIEWS Use First Angle Method 1. Front View 2. Top View 3. L.H.S.View A B a b 3 c 2 1
9. 9. F.V T.V L.H.S.V. B a b c 3 2 1 b 3 A
10. 10. FIGURE SHOWS ISOMETRIC VIEW OF AN OBJECT(WITHOUT DIMENSIONS) SHOW ITS THREE ORTHO GRAPHIC VIEWS Use Third Angle Method 1. Front View 2. Top View 3. L.H.S.View 1. Front View 2. Top View 3. L.H.S.View A a b 3 c 2 1
11. 11. FRONT VIEWL.H.S VIEW TOP VIEW A ab 3 c 2 1
12. 12. Aim : Figure shows isometric view, of a simple machine component. Draw its following Orthographic views, & dimension them. 1. Front View 2. Top View 3. R.H.S. View Use First Angle Method of projection
13. 13. Figure, is the isometric view X Figure L = 75+25=100 H = 10+30=40 D=50
14. 14. 10 10 F.V. 25 75 40 T.V. ORTHOGRAPHIC VIEWS F.V L=100 H=40 T.V L=100 D=50 S.V D=50 H=40
15. 15. 30 10 25 SQ 15 SQ Ø30,Depth 10 40 SQ ISOMETRIC ORTHO. VIEWS
16. 16. 25 Sq 4015 453535 15 Sq 40 Sq Ø30 5 10 30 10 5 10 R.H. S.V. F.V. T.V.
17. 17.  Figure shows the isometric view of a vertical shaft support.  Draw its all the three views, using first angle method of projections.  Give the necessary dimensions as per aligned system. Exercise :-
18. 18. ISOMETRIC VIEW Ø40 Ø64 24 50
19. 19. 1414 48 70 24 10 Ø40 50 Ø64 30 140 L.H.S.VFRONT VIEW TOP VIEW
20. 20. Isometric view of a rod support is given. Draw its all the three orthographic views, using first angle method of projections. Give all the dimensions. Exercise :-
21. 21. ISOMETRIC VIEW 16 20 R22 40 X
22. 22. TOP VIEW R22 2040 10 FRONT VIEW RIGHT SIDE VIEW 14020 80 SCALE: 1:1 3030 66 26 30
23. 23. 10 20R20 R8 30 ISOMETRIC ORTHO. VIEWS
24. 24. 45 30 8 20 25 16 R8 R20 30 20 10 100
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