isometric projection drawing -...
Post on 20-Mar-2018
254 Views
Preview:
TRANSCRIPT
adzl
yan
uar
©2
004
Isometric Projection DrawingCHAPTER 6
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
ContentContent
•Overview–Pictorial projection–Parallel projection–Axonometric projection
•Isometric projection–Axes and selection–Isometric lines and planes–Isometric scale–Isometric projection & Isometric drawing
•Producing Isometric sketches & drawing–Isometric lines & non-isometric lines–Circles and arcs–Irregular curves
•Oblique projection drawing
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.16.1 Pictorial projectionPictorial projection
•Pictorial projection:–Not intended to give
exact or true view–Not intended to
transmit dimensions, although sometimes dimension is useful
–Useful when the information and instructions to be given to non-technical and untrained people
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.16.1 Parallel projection techniqueParallel projection technique
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.16.1 Axonometric projectionAxonometric projection
•axon = axis; metric = measure, in Greek•Axonometric projection is a parallel
projection technique to create a pictorial drawing of an object by rotating the object on an axis relative to a projection or picture plane
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.16.1 Axonometric projectionAxonometric projection
•Axonometric projection–Trimetric–Dimetric–Isometric
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.16.1 Axonometric projectionAxonometric projection
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.26.2 Isometric projectionIsometric projection
•Isometric projection is a true representation of the isometric view of an object
•Isometric view is created by rotating the object 45 degree about vertical axis, and tilting it forward 35 deg 16’
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.26.2 Isometric projection: axesIsometric projection: axes
•The 3 axis meet at A,B form equal angles of 120 deg and they are called Isometric Axes
•OA is vertical, OB is inclined at 30deg to the right, OC is inclined at 30deg to the left
•Any lines parallel to these –Isometric Line•Any planes parallel –Isometric Planes
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.26.2 IsoIso--lines & lines & IsoIso--planesplanes
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.26.2 Selection of Isometric AxesSelection of Isometric Axes
•Main purpose of isometric view is to provide a pictorial view which reveals as much detail as possible
•Selection of principal edges is important•Figure shows 8 isometric views of the same
block
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.26.2 Selection of Isometric AxesSelection of Isometric Axes
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.26.2 Isometric projection: scaleIsometric projection: scale
•The tilt causes the edges & planes to become foreshortened
•The projected length is approximately 80% of the true length
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.26.2 Isometric projection & drawingIsometric projection & drawing
•Isometric projection & Isometric drawing–Isometric projection: drawn at scale of 0.816–Isometric drawing: drawn at full scale
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.36.3 Producing Isometric SketchesProducing Isometric Sketches
•Begin with defining isometric axis•Begin sketch by extending axes –vertical
lines, 30deg left & right
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.36.3 Producing Isometric SketchesProducing Isometric Sketches
•Sketch an isometric ‘box’•Sketch the view on each faces, starting
with isometric lines•Add in non-iso lines and other details•Darken all visible lines.
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.36.3 Isometric angles & nonIsometric angles & non--isoiso lineslines
•Isometric angles & non-iso lines
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.36.3 NonNon--isometric linesisometric lines
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.36.3 IsoIso--circles and arcscircles and arcs
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.36.3 IsoIso--circles and arcs: sketchcircles and arcs: sketch
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.36.3 IsoIso--circles and arcs: cylindercircles and arcs: cylinder
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.36.3 Partial arcsPartial arcs
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.36.3 Producing isometric drawingProducing isometric drawing
–Draw centre lines AOB and COD, O is centre of circle, AO=OB=CO=OD = radius of circle.
–Draw FCG and EDH parallel to AOB, draw FAE and GBH parallel to COD.
–Draw diagonal FOH, mark points J and K where FJ = HK = radius of circle.
–With centre G and rad. R1 = GA, draw an arc between GJ produced at L and GK produced at M. Similarly with centre E.
–With centres J and K and radius R2 = JL and KM, complete the figure.
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.36.3 IsoIso--circles and arcs: drawcircles and arcs: draw
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.36.3 IsoIso--circles and arcs: drawcircles and arcs: draw
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.36.3 Irregular curves in isometricIrregular curves in isometric
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.46.4 Producing Isometric drawingProducing Isometric drawing
–Read the orthogonal drawing carefully,–observe the scale, –choose the best point where isometric axes
meet to reveal as much detail as possible–draw an 'isometric box' enclosing the object–draw in light construction lines–draw arc & curves in thick, remove excess..–line in 30°right lines–line in 30°left lines–line in vertical lines to complete the view
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.46.4 Producing Isometric drawingProducing Isometric drawing
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.46.4 Producing Isometric drawingProducing Isometric drawing
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.56.5 Isometric dimensionsIsometric dimensions
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.56.5 Isometric featuresIsometric features
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.56.5 Isometric assembly: 3D renderIsometric assembly: 3D render
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.56.5 Isometric exploded assemblyIsometric exploded assembly
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.66.6 Oblique projection drawingOblique projection drawing
•Oblique projection –parallel projection where the projectors are parallel to each other but not perpendicular to the projection plane
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.66.6 Oblique projection drawingOblique projection drawing
•The actual angle that the projectors make with the plane is not fixed, but preferably between 30deg –60deg
•Most common 45 degree
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.66.6 Oblique projection drawingOblique projection drawing
•3 types:–Cavalier projection: true length along axis–Cabinet projection: half true length–General: any from half to full true length
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.66.6 Oblique projection drawingOblique projection drawing
•Place complex surfaces (arcs, holes, irregular curve, etc.) parallel to front plane
•The longest dimension should be parallel to frontal plane
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
6.76.7 Producing oblique sketchProducing oblique sketch
adzl
yan
uar
©2
004
End of Chapter 6THANK YOU
adzl
yan
uar
©2
004
MEMB113 | MANUAL DRAWING | CHAPTER 6MEMB113 | MANUAL DRAWING | CHAPTER 6
top related