14.removed and-revolved-sections-engineering108.com
- 1. SECTIONING OF A MACHINE COMPONENT BY ANY ONE SECTION PLA NE ,OUT OF THREE FOLLOWING MENTIONED SECTION PLANES
- 2. (1)BY A VERTICAL SECTION PLANE (PARALLEL TO PRINCIPLE V.P.) Hence , (a)The real or true shape of the section is observed in its F.V., known as SEC. F.V. - AB (b)Section plane will be seen as a cutting plane line (similar to center line ,thick at ends) with corresponding horizontal vision direction arrows at the center of thick ends in its T.V. & S.V.
- 3. (2)BY A HORIZONTAL SECTION PLANE Hence, (a)The real or true shape of the section is observed in its T.V., known as SEC. T.V. - AB (b) The cutting or section plane will be observed as a cutting plane line (similar to center line ,thick at ends) with the corresponding vertically downward vision direction arrows at the center of the thick ends in its F.V. and in S.V.
- 4. (3) BY A SECTION PLANE , NORMAL TO BOTH H.P. AND V.P. (i.e. parallel to profile plane or side view plane) Hence, (a)The real or true shape of the section is observed in its S.V., known as SEC. L.H.S.V – AB or SEC. R.H.S.V - AB (b) The cutting or section plane will be observed as a cutting plane line (similar to center line , thick at ends) with the corresponding vertically downward vision direction arrows at the center of the thick ends in its F.V. and in T.V.
- 5. 50 15 15 Figure shows isometric view of a machine component. Draw its (1)Front view, Top view & L.H.S View, using 3rd angle method of projections. (2)Sectional Front view, Top view & L.H.S.V., using 3rd angle method of projections.
- 6. 10 50 50 60 40 30 15 25 5 30 50 15 Front View Top View L.H.S.View 1. Ortho. Views (No sectioning)
- 7. A B Retained split of the machine parts It will be nearer to V.P. in 1st angle method & against the vertical plane in 3rd angle method.
- 8. 50 50 60 40 30 15 25 5 10 30 Top View Sectional Front View -ABL.H.S. View A B A B 2. (With sectioning)
- 9. 2020 60 A A X Figure shows the pictorial view of a machine component. Draw its following views as per First angle method of projections (1) Front view from X direction. (2) Sectional top view-AA (3) L.H.S. View
- 10. 20 Sketch shows the assumed cut model (retained part of the machine component / split against the observer) due to horizontal section plane passing through AB. X
- 11. 120 60 28 Ø30, 7deep Ø20 2020 14 F.V. Sectional T.V. L.H.S.V. A A A A
- 12. 20 60 30 X A B Figure shows the pictorial view of a machine components. Draw its following views, using 3rd angle method of projections. (1) Front view from arrow X (2) Top View (3) Sectional R.H.S.V - AB
- 13. B A Retained split of the machine parts Retained split, will be nearer to V.P. in 1st angle method & against the vertical plane in 3rd angle method. No hatching in this area as not contained in the section plane
- 16. A C B HALF SECTIONAL F.V.-AB HALF SECTIONAL LEFT S.V.-BC TOP VIEW In half section the hidden line should be used only on unsectioned side of the view, provided that they are necessary for dimensioning or for clarity.
- 17. REMOVED & REVOLVED SECTIONS SPECIAL SECTIONS
- 19. REVOLVED SECTION
- 20. REMOVED SECTION
- 21. REMOVED SECTIONS
- 22. NOTE:- (As per Previous I S 696 – 1972 Page 38) When the cutting plane passes (contains) the center line of such elements as, Shafts,bolts,nuts,rods,rivets,keys,pins, pulley arms, spokes, webs(ribs),screws,ball or roller bearings or similar shapes - no section lining or sectioning is needed for the objects , i.e. the hatching should be eliminated. (See the next demonstrating exercises following the above rule)
- 23. Vertical Collared Shaft (supported on webbed and drilled flange) in Conventional section in F.V., along with the T.V. Note:- As a rule, all the hidden lines should be omitted from a sectional view. The only exemption is where the hidden lines are absolutely Indispensable for clarification or for dimensioning. Actual or true projections are not preferred to draw
- 24. Section lines are to be staggered as shown at R OFFSET SECTION: The path of the cutting plane is bent to pass through features not located in a straight line, i.e. it is offset to pass through both principle features of the object. Example is shown below in Ex. 1 & Ex. 2. B B Ex. 1. R
- 25. A A P Q F.V (SECTION –AA) Section lines are to be staggered as shown at P,Q Ex. 2. Off set sectioning
- 26. pulley Tap bolt(fastener) shaft Shaft and pulley partly broken out to show internal fastening This is used to show only a desired features of the object . No cutting plane lines are necessary , shown by wavy line Partial (broken, local or Zonal) Section. See Ex. A,B & C Ex. A
- 27. Partial (broken, local or Zonal) Section. Ex. B
- 28. SPECIAL SECTION SECTION IN TWO INTERSECTING PLANES A B SEC. F.V. - ABR.H.S.V.
- 29. SPECIAL SECTION Cross hatching of adjacent parts See at (1) & (2) (1)
- 30. Hatching more than two adjacent components at (2) (2) A B C (hatched at 60 ) D45 45 hatched at 30 on D SPECIAL SECTION
- 31. A B F.V. SEC.T.V. Two vertical plates ,fastened by a horizontal rivet is shown in its F.V. & T.V., cut by horizontal section plane. Note the rivet is shown in section in T.V.
- 32. CONVENTIONAL REPRESENTATION OF CYLINDER IN WHICH CIRCULAR OR RECTANGULAR HOLE CUT IN ITS F.V. Note:- The actual shape of hole or slot may be understood from its side view. For circular hole For rectangular slot ACTUAL PROJECTIONS
- 34. It is the sectional view not in principal planes. it may be full, half ,broken out , removed or revolved.The section should be shown in its normal auxilary position and clearly identified with a cutting plane with letters AUXILIARY SECTION (as special section)
- 35. A A B C D DCB SECTION AA SECTION BB SECTION SECTION DD SUCCESSIVE SECTIONS (REMOVED TYPE)
- 36. A A B C D DCB SUCCESSIVE SECTIONS (REMOVED TYPE)
- 37. SECTION AA SECTION BB SECTION CC SECTION DD SUCCESSIVE SECTIONS (REMOVED TYPE)
- 40. Top View Sectional Front View -AB L.H.S. View A B A B 2. (With sectioning)
- 43. 0
- 44. Aim:-Sketch-1, shows Isometric View of a machine part. Draw its following orthographic views using third angle method of projections, giving dimensions. (1) Sectional F.V.-AA (2) T.V. (3) L.H.S.V A A 8 Φ20Φ36 A A LEFT HAND SIDE VIEW SECTIONAL FRONT VIEW AA TOP VIEW X SCALE:- 1:1 SYMBOL OF PROJECTION METHOD, NOT SHOWN Sketch-1 2 HOLES,Φ 14 Φ36 Φ20 R35 65 14` 100 AA SOLUTION` 30
- 45. A A LEFT HAND SIDE VIEW SECTIONAL FRONT VIEW AA TOP VIEW SCALE:- 1:1 SYMBOL OF PROJECTION METHOD, NOT SHOWN SOLUTION` AA 100 8 Φ20Φ36 2 HOLES,Φ 14 X Φ36 Φ20 R35 A A Aim:-Sketch-1, shows Isometric View of a machine part. Draw its following orthographic views using third angle method of projections, giving dimensions. (1) Sectional F.V.-AA (2) T.V. (3) L.H.S.V 14 30 Hatch (section) lines, to be kept at 1 to 1.5 mm apart, at 45° normally, but depends on areas to be hatched.