Lec 3 Ortho Practice.final

1. Y VP Y HP X X Z1 ISOMETRIC VIEW OF F.V. Plane L.H.S.V. Plane OBJECT IN FIRST QUADRANT (FOR L.H.S.V.) H F.V. L.H.S.V. H PP L D D L T.V. T.V. Plane FIRST ANGLE METHOD OF PROJECTIONS (FOR L.H.S.V.)

2. Fig. 2(c) shows turning of the planes H.P & P.P with their respective hinges, considering V.P as fixed plane. 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 L.H.S.V (Z1 directional view) is on P.P • F.V is within L & H, T.V is within L & D, While L.H.S.V is within H & D. • c) The symbol for Istangle method of projections is placed as shown on fig. 2(c)

3. V.P P.P F.V. Y X H.P H D L.H.S.V. L T.V. Fig. 2(c)

4. AIM: Fig. 2(a) shows the Pictorial (ISOMETRIC) view of a cut block. Draw its following orthographic views using Ist angle method of projections. • Front View • Top View • R. H. S.View

5. Y Y V.P P.P H X L D Fig 2(a) Y F.V. R.H.S.V. Y H.P T.V. H Z2 X L D Z2 X Fig 2(b)

6. 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

7. Fig. 2(c) shows turning of the planes H.P & P.P with their respective hinges, considering plane V.P as fixed plane. • It may be noted that :- • 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 • 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 Istangle method of projections is placed as shown on fig. 2(c)

8. P.P V.P H D R.H.S.V. F.V. H.P L Y X T.V. Fig. 2(c)

9. AIM: Fig. 3(a) shows the Pictorial (ISOMETRIC) view of a cut block. Draw its following orthographic views using IIIrd angle method of projections. • Front View • Top View • Left Hand Side View

10. Y Y Y H H.P X L D X Z1 P.P Fig 3(a) T.V. D L H L.H.S.V. F.V. V.P Z1 X Plane H.P turned up(above V.P) Plane P.P turned side way(towards left side of plane V.P) Fig 3(b)

11. Note : IIIrd angle means, the block is assumed behind V.P, below H.P and inside P.P, as in fig. 3(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 & L.H.S.V. is projected on P.P, seen in Z1 direction

12. Fig. 3(c) shows turning of the planes H.P & P.P with their respective hinges, considering plane V.P as fixed plane. • It may be noted that :- • F.V. (X directional view) is on V.P, T.V. (Y directional view) is on H.P, while L.H.S.V (Z1 directional view) is on P.P • b) F.V is within L & H, T.V is within L & D, While L.H.S.V is within H & D. • c) The symbol for IIIrd angle method of projections is placed as shown on fig. 3(c)

13. 4 T.V. Y X 6 2 L D H F.V. L.H.S.V Fig. 3(c)

14. AIM: Fig. 4(a) shows the Pictorial (ISOMETRIC) view of a cut block. Draw its following orthographic views using IIIrd angle method of projections. • Front View • Top View • Right Hand Side View

15. Y Y H.P X Y X Z2 D L T.V. Fig. 4(a) D L H H F.V. V.P R.H.S.V. P.P X Z2 Fig. 4(b) Planes H.P, V.P & P.P are assumed as transparent

16. Note : IIIrd angle means, the block is assumed behind V.P, below H.P and inside P.P, as in fig. 4(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.

17. Fig. 4(c) shows turning of the planes H.P &P.P with their respective hinges, considering plane V.P as fixed plane. • It may be noted that :- • 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 • 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 IIIrd angle method of projections is placed as shown on fig. 4(c)

18. H.P D T.V. P.P Y X L H R.H.S.V. F.V. V.P Fig. 4(c)

19. Step by step procedure Suggested to prepare Orthographic views (First angle method) for The simple component Shown pictorially in figure

20. 20 20 40 20 60 80 Ø40 R40 100 20 ISOMETRIC VIEW X

21. 20 20 R20 80 20 20 ø40 80 R40 100 R.H.S.V FRONT VIEW SYMBOLIS NOT MARKED SCALE: 1:1 TOP VIEW

22. FIGURE SHOWS ISOMETRIC VIEW OF A SIMPLE OBJECT(WITHOUT DIMENSIONS) SHOW ITS THREE ORTHOGRAPHIC VIEWS a • Front View • Top View • L.H.S.View b B 2 3 A Use First Angle Method c 1

23. b B 2 3 A 1 F.V L.H.S.V. a b c 3 T.V

24. FIGURE SHOWS ISOMETRIC VIEW OF AN OBJECT(WITHOUT DIMENSIONS) SHOW ITS THREE ORTHO GRAPHIC VIEWS a • Front View • Top View • L.H.S.View • Front View • Top View • L.H.S.View c 3 b A Use Third Angle Method 2 1

25. c a b TOP VIEW 3 A 2 1 FRONT VIEW L.H.S VIEW

26. Aim : Figure shows isometric view, of a simple machine component. Draw its following Orthographic views, & dimension them. • Front View • Top View • R.H.S. View Use First Angle Method of projection

27. L = 75+25=100 X H = 10+30=40 R25 D=50 20 30 10 10 40 10 75 Figure 50 Figure, is the isometric view

28. L=100 F.V H=40 L=100 T.V D=50 D=50 S.V H=40 10 40 10 R.H.S.V. F.V. 20 50 R25 10 40 25 75 ORTHOGRAPHIC VIEWS T.V.

29. 40 SQ Ø30,Depth 10 25 SQ 10 30 15 SQ 35 5 10 35 5 40 ISOMETRIC ORTHO. VIEWS 45 15

30. 10 30 5 10 35 45 35 15 40 Sq 25 Sq 40 10 5 15 Sq Ø30 F.V. R.H.S.V. T.V.

31. Exercise :- • 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.

32. Ø64 Ø40 24 50 25 10 140 20 48 ISOMETRIC VIEW

33. Ø40 Ø64 24 50 30 10 140 14 48 14 70 L.H.S.V FRONT VIEW TOP VIEW

34. Exercise :- 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.

35. R22 40 Ø24 20 80 60 20 30 16 20 140 20 X 40 ISOMETRIC VIEW

36. R22 30 30 30 66 26 10 20 40 20 80 140 FRONT VIEW RIGHT SIDE VIEW SCALE: 1:1 TOP VIEW

37. 20 R20 30 16 30 8 10 20 10 25 100 R8 45 ISOMETRIC ORTHO. VIEWS

38. R20 20 30 10 100 16 8 30 25 20 45 R8