Please enable JavaScript.
Coggle requires JavaScript to display documents.
ISOMETRIC & ORTHOGRAPHIC PROJECTIONS - Coggle Diagram
ISOMETRIC & ORTHOGRAPHIC PROJECTIONS
ISOMETRIC
the isometric drawing, the vertical lines will also stay vertical
isometric models are constructed on 3 axes that divide the circle equally.
they are 120 deg from each other
Orthographic Projection
help communicate clear and umambiguous
Simple way of representing engineering design drawing
A collection of 2D drawings used to define a 3D model
There are 6 possible views in orthographic projection
First and Third Angle Projections
Methods used to represent 3D objects in 2D.
Essential for accurately conveying the dimensions and geometry of a part of assembly
In first angle projection, object is placed between the observer and the plan of projection
resulting in the views being projected onto the opposite side of the plane
In third angle projection, the plane of projection is between the observer and the object
causing the views to be projected onto the same side of the plane
Crucial for interpreting and creating technical drawings in engineering
Types of lines
Visible lines
to represent features of an object that are visible in a particular view
typically drawn as solid, thick lines to ensure they stand out clearly in the drawing
essential or conveying the shape and details of the object being depicted
help provide clear and accurate representation of the object's geometry in engineering drawings.
Hidden lines
to represent features that are not visible in a particular view
usually drawn as dashed lines to differentiate them from visible lines
help to convey the internal or hidden features of an object
crucial for understanding the complete structure of the object, including its internal components
center lines
indicate the centers of holes, cylinders and other symmetrical features
typically drawn as alternating long and short dashes
important for accurately locating and aligning features on the drawing
help to ensure that symmetrical features are properly positioned and aligned in relation to each other