Engineering Drawing
Course Outline
This one-semester non-phased course is an introduction to
computer-aided drafting (CAD). The student should
become familiar with the principles of CAD and reasonably proficient in the use
of AutoCAD. The students will use the
AutoCAD software to duplicate several plot plans and geometric shapes. The student will learn the fundamentals of
drawing orthogonal multi-views of real objects; followed by drawing isometric
projections of these objects. An
important object is learning to use 2D multi-view to visualize what a 3D object
looks like; and vice versa.
Drawing is a method of visual communications. Drafting is the use of pictures to describe
an object precisely so that it can be constructed. Drafting forms a visual bridge between an
idea and its creation. A computer aided
drafting system is to objects and engineering as what a word processor is to
words and writing. Drafting
has become an international language of graphic communication used in
industry. CAD is accurate, precise
drawing methods used to create detailed designs.
Prerequisites: Technology Utilization
I.
Introduction
Provide
justification for drafting – a universal language to that details what objects
look like.
Start using the
computer-aided drafting software (called AutoCAD).
Duplicate existing single view drawings using the AutoCAD
software.
A.
Your Creation
1.
Glue 8 to 10 blocks together
2.
Write building instructions in English (no
diagrams)
3.
2nd group uses instructions to build
(no glue)
4.
Draw three views of the creation
5.
1st group checks the drawing
correctness
6.
Both groups discuss how to improve the
instructions
B.
Kitchen
1.
Tutorial - with full instructions
2.
Drawing layout
a.
Measurement units
b.
Drawing size
c.
Draw & snap grid setup
3.
Locating points – coordinates
a.
Cartesian coordinates
b.
Polar coordinates
c.
Absolute coordinates
d.
Relative coordinates
e.
Last point
f.
Base point
4.
Locating points – snapping
a.
Snap to grid
b.
Object snap
c.
Orthogonal & polar snap
5.
Drawing objects
a.
Lines & poly- lines
b.
Rectangles & other polygons
c.
Circles, ellipses & curves
6.
Object properties
a.
Color
b.
Size
c.
Line type and weight
7.
Selecting objects
a.
Window
b.
Crossing
c.
Fence
d.
Last & previous
8.
Modify objects
a.
Move
b.
Rotate
c.
Trim & extend
d.
Filet
9.
Viewing drawings
a.
Zoom
b.
Pan
c.
Redraw
d.
Regenerate
C.
Kitchen plus Dimensions
1.
With full instructions
2.
Dimensioning objects
a.
Units
b.
Formatting
c.
Linear dimensions
d.
Radial dimensions
3.
Dimensioning guidelines & styles
4.
Adding text to a drawing
D.
Landscape Plan
1.
With full instructions
2.
Defining layers
3.
Using different line types
4.
Adding similar objects
a.
Mirror
b.
Offset
c.
Arrays
5.
Joining & splitting objects
a.
Explode
b.
Divide & join
c.
Blocks
E.
Square Puzzle
1.
Setting up drawing space
2.
Specifying complex locations
3.
Drawing & modifying odd shapes
4.
Work in a group
F.
Four Geometric Shapes
1.
Some instructions
2.
Using guidelines extensively
3.
Hatching - closed areas
4.
Using point styles
G.
Brace
1.
Some instructions
2.
Duplicate an object drawing
3.
Interpreting dimensions
4.
Working with circles & arcs
II.
Multiple Views
Introduce
multiple view drawings,
Duplicate
given multiple view drawings.
Determine and draw additional views.
A.
Die Layout
1.
Draw surface with nine possible dots
2.
Draw “unfolded” six sides of a die; align
hatched dots correctly on each surface
B.
Chock
1.
Introduction to six multi views
2.
Sketch six views
3.
Cut out sketch and fold
4.
Draw six views with AutoCAD
C.
Flange
1.
Duplicate two views [front & right]
2.
Views must be lined up
3.
Hidden lines
4.
Create & draw top view
D.
Step Block
1.
Duplicate two views
2.
Create the 3rd view
E.
Bracket
1.
Duplicate two views
2.
Create the 3rd view
F.
Brace Revisit
1.
Draw right view
G.
Green Angled Blocks
1.
Duplicate two views; requires drawing both views
simultaneously
2.
Create the 3rd view
III.
Isometric Views
Introduce
isometric views.
Duplicate
given isometric view drawings.
Determine
& draw isometric view from a given multi-view drawing
Determine & draw multi-view from a given isometric
drawing
A.
Chock - Revisit
1.
Duplicate isometric drawing
B.
Step Block - Revisit
1.
Draw isometric view
C.
2 Level Block
1.
Create three views from isometric
2.
Duplicate isometric drawing
3.
Create isometric after 90° rotation
D.
Guide Block
1.
Draw isometric circles
2.
Duplicate two views
3.
Create third view
4.
Create isometric view
E.
Green Angular Blocks - revisit Optional
1.
Draw isometric view
F.
Three Cubes Optional
1.
Draw isometric view
G.
Possible additional assignments
1.
Given two orthogonal views:
Draw 3rd view & isometric
2.
Given isometric view:
Draw three orthogonal views
3.
Measure & draw classroom
4.
Student's own house floor plan
IV.
Solid Objects
Create
two-dimensional drawings that accurately describe three-dimensional objects.
Use two-dimensional drawings to visualize a three-dimensional
object.
A.
Your Creation - Revisited
1.
Create three orthogonal views
2.
Create isometric view
B.
Yellow Plastic Anchor
1.
Create three orthogonal views
2.
Create isometric view
C.
Red Wooden Angle Bracket
1.
Create three views
2.
Create isometric view
D.
Multi-Piece Wooden Triangular Artwork
1.
Create three orthogonal views
E.
Green Plastic Base Plate
1.
Create three views
2.
Create isometric view
F.
Black Wooden Block - Curved
1.
Create three views
2.
Create isometric view
G.
Guide – 2 holes
1.
Create three views
2.
Create isometric view
H.
Guide – 3 holes
1.
Create three views
2.
Create isometric view
I.
Orange Plastic Angled Linkage
1.
Create two views
J.
Sailboat
1.
Create three views
2.
Create isometric view
Updated: June 17, 2003