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# Section of solids

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Section of solids, Computer Aided Machine Drawing (CAMD) of VTU Syllabus prepared by Hareesha N Gowda, Asst. Prof, Dayananda Sagar College of Engg, Blore. Please write to hareeshang@gmail.com for suggestions and criticisms.

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### Section of solids

1. 1. 1/30/2014 Hareesha N Gowda, DSCE, Blore-78 1
2. 2. Typical Section Planes & Typical Shapes Of Sections. Triangle Section Plane Ellipse Section Plane Through Generators Through Apex Section Plane Parallel to end generator. Ellipse Cylinder through generators. Section PlaneHyperbola Parallel to Axis. Trapezium Sq. Pyramid through all slant edges
3. 3. ILLUSTRATION SHOWING IMPORTANT TERMS IN SECTIONING. For TV SECTION PLANE TRUE SHAPE Of SECTION x y Apparent Shape of section SECTION LINES (450 to XY) SECTIONAL T.V.
4. 4. SECTIONING A SOLID. An object ( here a solid ) is cut by some imaginary cutting plane to understand internal details of that object. OBSERVER UPPER PART REMOVED (A) The action of cutting is called SECTIONING a solid & The plane of cutting is called SECTION PLANE.
5. 5. Section plane perpendicular to VP and Parallel to HP Projection of the section plane on VP VP S HP Section plane perpendicular to VP and Parallel to HP S VP HP Top View in Section
6. 6. Section plane perpendicular to VP and inclined to HP Projection of the section plane on VP VP VP HP HP Top View in Section Section plane perpendicular to VP and Inclined to HP
7. 7. Section plane perpendicular to HP and Parallel to VP Front View in Section VP VP HP HP Section plane perpendicular to HP and parallel to VP S S Projection of the section plane on HP
8. 8. Section plane perpendicular to HP and inclined to VP Front View in Section VP HP VP HP Section plane perpendicular to HP and inclined to VP Projection of the section plane on HP
9. 9. Section plane perpendicular to both HP and VP Side View in Section S VP RPP X S HP VP HP S Section plane perpendicular to both HP and VP Y S
10. 10. Section of Solids • A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the HP with one of its edges parallel to the VP. A section plane passing through one of the base corners of the pyramid and the two slant edges at 20mm and 30mm above HP cuts the pyramid. Draw the front view, sectional top view and true shape of the section. Determine the inclination of the section plane with the reference plane. 1/30/2014 Hareesha N Gowda, DSCE, Blore-78 10
11. 11. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the HP with one of its edges parallel to the VP. A section plane passing through one of the base corners of the pyramid and the two slant edges at 20mm and 30mm above HP cuts the pyramid. Draw the front view, sectional top view and true shape of the section. Determine the inclination of the section plane with the reference plane. • Draw XY Line, mark HP and VP. V P X 1/30/2014 Y H P Hareesha N Gowda, DSCE, Blore-78 11
12. 12. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the HP with one of its edges parallel to the VP. A section plane passing through one of the base corners of the pyramid and the two slant edges at 20mm and 30mm above HP cuts the pyramid. Draw the front view, sectional top view and true shape of the section. Determine the inclination of the section plane with the reference plane. • Draw Top view and Front View, Mark points 60 o' V P X c' a' (o1 ') b' H P b o(o1 ) 40 c Y 1/30/2014 a Hareesha N Gowda, DSCE, Blore-78 12
13. 13. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the HP with one of its edges parallel to the VP. A section plane passing through one of the base corners of the pyramid and the two slant edges at 20mm and 30mm above HP cuts the pyramid. Draw the front view, sectional top view and true shape of the section. Determine the inclination of the section plane with the reference plane. o' 60 • V P X 1 ' c' Show the Section plane, draw vertical projectors to the top view and obtain section pints in the top view. 2' a' (o1 ') 3' b' H P 1 o(o1 ) 3b 40 c Y 2 1/30/2014 a Hareesha N Gowda, DSCE, Blore-78 13
14. 14. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the HP with one of its edges parallel to the VP. A section plane passing through one of the base corners of the pyramid and the two slant edges at 20mm and 30mm above HP cuts the pyramid. Draw the front view, sectional top view and true shape of the section. Determine the inclination of the section plane with the reference plane. 60 o' V P X 1 ' c' • Show the sectional top view 2' a' (o1 ') 3' b' 1 3b H P c Y 40 o(o1 ) 2 1/30/2014 a Hareesha N Gowda, DSCE, Blore-78 14
15. 15. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the HP with one of its edges parallel to the VP. A section plane passing through one of the base corners of the pyramid and the two slant edges at 20mm and 30mm above HP cuts the pyramid. Draw the front view, sectional top view and true shape of the section. Determine the inclination of the section plane with the reference plane. • Show the Auxiliary inclined plane, parallel to section plane, draw perpendiculars from the section pints to the auxiliary inclined plane, measure the distances from XY line to section points in the top view X 1 60 o' 1 ' 2' X 2 a' (o1 ') 3' b' 1 3b Y 21 ,71 H P 27,48 c o(o1 ) 40 X c' 48,65 V P 2 1/30/2014 a Hareesha N Gowda, DSCE, Blore-78 15
16. 16. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the HP with one of its edges parallel to the VP. A section plane passing through one of the base corners of the pyramid and the two slant edges at 20mm and 30mm above HP cuts the pyramid. Draw the front view, sectional top view and true shape of the section. Determine the inclination of the section plane with the reference plane. 2'' 1 '' X 1 o' 60 3'' 1 ' 2' X 2 a' (o1 ') 3' b' 1 3b Y 21 ,71 H P 27,48 c o(o1 ) 40 X c' 48,65 V P • Reproduce the distances of the top view section points from XY line in to Auxiliary plane, mark points, 1’’, 2’’ and 3’’, join these three points. 2 a 1/30/2014 Hareesha N Gowda, DSCE, Blore-78 16
17. 17. A triangular pyramid, base 40mm sides and axis 60mm long, resting on its base on the HP with one of its edges parallel to the VP. A section plane passing through one of the base corners of the pyramid and the two slant edges at 20mm and 30mm above HP cuts the pyramid. Draw the front view, sectional top view and true shape of the section. Determine the inclination of the section plane with the reference plane. • Make visible edges, Retaining portion dark • Show the annotation. Show ans. if Any 1/30/2014 Hareesha N Gowda, DSCE, Blore-78 17