Engineering Drawinganup/07isometric_projection.pdfOrthographic Projection Isometric Projection Two...
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Transcript of Engineering Drawinganup/07isometric_projection.pdfOrthographic Projection Isometric Projection Two...
Isometric Projection of SolidsIsometric View of Solids
Engineering Drawing
Anup Ghosh
Department of Aerospace EngineeringIndian Institute of Technology Kharagpur
September 7, 2012
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric Projection
1 Isometric means equal measure
2 mutually perpendicular plane surfaces of an object and theedges formed by these surfaces are equally inclined to a planeof projection
3 only one view on a plane is drawn to represent the threedimensions of an object
4 provides a pictorial view with a real appearance
Orthographic Projection Isometric Projection
Two or more views are drawn tounderstand the object properly
Only one view is drawn
A good imagination is requiredto visualize in 3D
Easy to visualize 3D
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
The plane of projection
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
A specific type of projection of a cube
Cube resting on ground on one of its corners with a solid diagonal perpendicular toVP, Front view is isometric projection
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Terminologies
1 Isometric Axes : CB, CD and CG 1200 apart
2 Isometric line : lines parallel to this axes
3 Isometric Plane : Planes representing thefaces of the cube and all parallel planes tothose.
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric Scale and True Scale
Comparison with cube projection
All the edges of the cube are equally foreshortened , only BD is the true diagonal,BPDQ is the true length top face of the cube.
BA
BD=
1
cos 30=
2√
3=⇒
BP
BD=
1
cos 45=√
2 =⇒BA
BP=
√2
√3
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric View of Solids
Due to the ease in construction and the advantage of measuringthe dimensions directly from the drawing, it has become a generalpractice to use the true scale instead of the isometric scale. Theview drawn with true scale is called isometric view, whilethat drawn with isometric scale is called isometric projection.
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Four-center method
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Four-center method
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Four-center method
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Four-center method
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Four-center method
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Four-center method
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Four-center method
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Four-center method
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of plane figures
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
A Pentagonal Pyramid
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
A Pentagonal Pyramid
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
A Pentagonal Pyramid
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
A Hexagonal Prism
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric projection of sphere
Anup Ghosh Engineering Drawing
Isometric Projection of SolidsIsometric View of Solids
Isometric view of sphere
Anup Ghosh Engineering Drawing