engineering drawing - aerospace engg iitkgpanup/03projection_planes.pdf · 2016-03-10 ·...
TRANSCRIPT
![Page 1: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/1.jpg)
Projection of Plane Figures
Engineering Drawing
Anup Ghosh
Department of Aerospace EngineeringIndian Institute of Technology Kharagpur
August 26, 2011
Anup Ghosh Engineering Drawing
![Page 2: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/2.jpg)
Projection of Plane Figures
Planes perpendicular to a ref. plane and parallel to other
Anup Ghosh Engineering Drawing
![Page 3: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/3.jpg)
Projection of Plane Figures
Planes perpendicular to both planes
Anup Ghosh Engineering Drawing
![Page 4: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/4.jpg)
Projection of Plane Figures
Planes perpendicular to a ref. plane and inclined to other
Anup Ghosh Engineering Drawing
![Page 5: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/5.jpg)
Projection of Plane Figures
Planes perpendicular to a ref. plane and inclined to other
Anup Ghosh Engineering Drawing
![Page 6: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/6.jpg)
Projection of Plane Figures
Planes ?
Anup Ghosh Engineering Drawing
![Page 7: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/7.jpg)
Projection of Plane Figures
Procedure .. .. ..
1 Regular pentagon
2 A side on ground
3 θ = 450
Anup Ghosh Engineering Drawing
![Page 8: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/8.jpg)
Projection of Plane Figures
Procedure .. .. ..
1 R = 5cm
2 φ = 300
3 Center, 3cmabove and 2cmin front
Anup Ghosh Engineering Drawing
![Page 9: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/9.jpg)
Projection of Plane Figures
Procedure .. .. .. oblique plane
Problem
1 A square of 50mm side.
2 A corner is on HP.
3 θ = 300 for a diagonal.
4 φ = 450 for the otherdiagonal.
Steps for drawing
1 Assume it as lying on HP.
2 Make the diagonal ‖ to VPto θ = 300.
3 Make the other diagonal ⊥to VP to φ = 450.
Observations
1 It appears that the rectangle is rotated keeping the point ’a’fixed.
2 When a plan/elevation does not change any dimension thenames remain same.
Anup Ghosh Engineering Drawing
![Page 10: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/10.jpg)
Projection of Plane Figures
Procedure .. .. .. oblique plane
Problem
1 A square of 50mm side.
2 A corner is on HP.
3 θ = 300 for a diagonal.
4 φ = 450 for the otherdiagonal.
Steps for drawing
1 Assume it as lying on HP.
2 Make the diagonal ‖ to VPto θ = 300.
3 Make the other diagonal ⊥to VP to φ = 450.
Observations
1 It appears that the rectangle is rotated keeping the point ’a’fixed.
2 When a plan/elevation does not change any dimension thenames remain same.
Anup Ghosh Engineering Drawing
![Page 11: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/11.jpg)
Projection of Plane Figures
Procedure .. .. .. oblique plane
Problem
1 A square of 50mm side.
2 A corner is on HP.
3 θ = 300 for a diagonal.
4 φ = 450 for the otherdiagonal.
Steps for drawing
1 Assume it as lying on HP.
2 Make the diagonal ‖ to VPto θ = 300.
3 Make the other diagonal ⊥to VP to φ = 450.
Observations
1 It appears that the rectangle is rotated keeping the point ’a’fixed.
2 When a plan/elevation does not change any dimension thenames remain same.
Anup Ghosh Engineering Drawing
![Page 12: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/12.jpg)
Projection of Plane Figures
Procedure .. .. .. oblique plane
Anup Ghosh Engineering Drawing
![Page 13: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/13.jpg)
Projection of Plane Figures
Procedure .. .. .. oblique plane
Problem
1 A circle of dia 50mm.
2 Resting on HP with angleθ = 450.
3 a) TV/plan makes and angle300 with VP.
4 b) the diameter inclined toHP makes an angleφ = 300 with VP.
Steps for drawing
1 Only the plan form is tiltedto 300.
2 Draw original length ofdiameter a1b2 inclined at300.
3 Draw rs and cut projectedlength (a1b1) as a1b3 on rs.
Anup Ghosh Engineering Drawing
![Page 14: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/14.jpg)
Projection of Plane Figures
Procedure .. .. .. oblique plane
Problem
1 A circle of dia 50mm.
2 Resting on HP with angleθ = 450.
3 a) TV/plan makes and angle300 with VP.
4 b) the diameter inclined toHP makes an angleφ = 300 with VP.
Steps for drawing
1 Only the plan form is tiltedto 300.
2 Draw original length ofdiameter a1b2 inclined at300.
3 Draw rs and cut projectedlength (a1b1) as a1b3 on rs.
Anup Ghosh Engineering Drawing
![Page 15: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/15.jpg)
Projection of Plane Figures
Procedure .. .. .. oblique plane
Anup Ghosh Engineering Drawing
![Page 16: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/16.jpg)
Projection of Plane Figures
A general procedure for drawing any polygon.
Steps for drawing
1 BP is ⊥ to AB.
2 Draw a perpendicularbisector of AB.
3 5 is mid point of 4 and 6.
4 5-6 = 6-7 and so on.
Anup Ghosh Engineering Drawing
![Page 17: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/17.jpg)
Projection of Plane Figures
A general procedure for drawing any polygon.
Steps for drawing
1 BP is ⊥ to AB.
2 Draw a perpendicularbisector of AB.
3 5 is mid point of 4 and 6.
4 5-6 = 6-7 and so on.
Anup Ghosh Engineering Drawing
![Page 18: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/18.jpg)
Projection of Plane Figures
A general procedure for drawing any polygon.
Steps for drawing
1 BP is ⊥ to AB.
2 Draw a perpendicularbisector of AB.
3 5 is mid point of 4 and 6.
4 5-6 = 6-7 and so on.
Anup Ghosh Engineering Drawing
![Page 19: Engineering Drawing - Aerospace Engg IITKGPanup/03Projection_planes.pdf · 2016-03-10 · Projection of Plane Figures Procedure .. .. .. oblique plane Problem 1 A square of 50mm side](https://reader033.vdocuments.mx/reader033/viewer/2022041919/5e6b38d6d2891854392fb6dc/html5/thumbnails/19.jpg)
Projection of Plane Figures
A general procedure for drawing any polygon.
Steps for drawing
1 BP is ⊥ to AB.
2 Draw a perpendicularbisector of AB.
3 5 is mid point of 4 and 6.
4 5-6 = 6-7 and so on.
Anup Ghosh Engineering Drawing