View
312
Download
0
Category
Preview:
Citation preview
8/8/2019 Orthographic Projection I
1/10
23.02.2009
1
ME 101ME 101
ENGINEERING GRAPHICSENGINEERING GRAPHICS
Assist.Prof.Dr. Ouzhan YILMAZMechanical Engineering Department
Room: 319oyilmaz@gantep.edu.tr
http://www.gantep.edu.tr/~oyilmaz
The University of GaziantepThe University of Gaziantep
Orthographic ProjectionOrthographic Projection--II
Faculty of EngineeringFaculty of Engineering
Introduction and Objectives
Ortho_ Greek word meaning perpendicular.
A system of drawing to represent 3D objects by using multiple-viewdrawings. In this system of projection, the 3D object is projected perpendicularlyonto a projection plane with parallel projectors.
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Objectives:
To understand the basic principles oforthographic projection To be able to construct orthographicviews of simple objects To visualize 3D objects from drawingsshowing their orthographic views
8/8/2019 Orthographic Projection I
2/10
23.02.2009
2
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Projection Methods
Perspective projection Parallel projection
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Projection Methods: Parallel projections
OrthographicOrthographic ObliqueOblique
Line of sight is perpendicular to plane Line of sight is oblique to plane
8/8/2019 Orthographic Projection I
3/10
23.02.2009
3
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Multi-view
FRONT view is the most descriptive view of the object. The view that gives moreinformation about the object.
Rotate 90 degrees up to get top view
Rotate Back
Rotate 90 degrees clockwise to get right side
Glass-box approach
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Place the object in a glass box
Glass-box approach is used for developing orthographic projection drawings
Project points on the front view of the glass-box
8/8/2019 Orthographic Projection I
4/10
23.02.2009
4
Glass-box approach
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Glass-box approach
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
8/8/2019 Orthographic Projection I
5/10
23.02.2009
5
Glass-box approach
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Projection Systems
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
8/8/2019 Orthographic Projection I
6/10
23.02.2009
6
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Projection Systems
Projection Systems
8/8/2019 Orthographic Projection I
7/10
23.02.2009
7
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Projection Systems
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Projection System symbols
8/8/2019 Orthographic Projection I
8/10
23.02.2009
8
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Projection Systems
Six principal views
Generally do not need all six to fully
describe the object.
A conventional Engineering Drawing
will normally have 2 to 3 views unless it
required more views to describe the
geometry/ profile.
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
8/8/2019 Orthographic Projection I
9/10
23.02.2009
9
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Conventional Orthographic Views
Height
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Conventional Orthographic Views
8/8/2019 Orthographic Projection I
10/10
23.02.2009
10
Transferring dimensions
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Draw a miter line at 45 degrees
at a convenient distance to
produce the desired view.
ME 101ME 101
Dr. Ouzhan Ylmaz
Orthographic ProjectionOrthographic Projection
Transferring dimensions
Sketch light lines projecting depth locations forpoints to miter line and then up into side viewas shown.
Recommended