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MAE 1004
HW #1 due Wed. (Feb. 2) in class at 3:45 pm PLEASE include your lab section on page 1 (after
your name; e.g., John Smith, Section 33) Get four pencils and bring them to class Where to buy the B pencil?
to buy the pencil? Today’s topics
Chapter
1.
1. the importance of the “construction line” pencil Inclass
1/31/2011 6 Sketching and Shape Description
Sketching and Shape Description
practice
practice
1 MAE 1004 HW #1 John Smith, Section 33 Cube
(drawing and its dimensions) Cylinder
(drawing and its dimensions) Page 1 2 Get pencils, eraser, and ruler
pencils eraser and ruler Where to buy the B pencil? 3 MAE 1004
MAE 1004
En
Engineering Drawing and
Computer Graphics
Chapter 6
Sketching and Shape Description Obj
Objectives Learn principles of technical sketching
View sketches of objects in 2D and 3D
3Sketch the primary views of an orthographic drawing
Practice sketching (freehand drawing) Construction lines, visible lines, hidden lines, and centerlines Pencil 1, Pencil 2, Pencil 3, and Pencil 4 ***** See solid models of some objects discussed in class
in Professor Shen’s office
in Professor Shen office
5 6 * Use graph paper if possible 7 ISOMETRIC 8 9 Pencil 1
Pencil 2
Pencil 3 Pencil 4 10 HB (or B) pencil
4 3 HB (or B) pencil B (or 2B) pencil
2
H (or 2H) pencil
1 11 Several ‘onestroke’ segments 12 No gap when sketching visible lines
Several ‘onestroke’ segments 13 14 15 * Use
Use graph paper if possible
graph paper if possible
16 II’ 17 Construction line II’ 18 Construction line Visible line II’ 19 II’ 20 No gap
No gap No gap II’ No gap No gap You may rotate the paper
when sketching a circle (or
another feature)
th
21 Create construction lines first 22 Create construction lines first
li
fi
Do not erase construction lines in this class 23 Important: “Construction Line” pencil (or pencil 1)
24 25 * We use graph paper in sketching
** Calculate the number of grids carefully
26 27 28 Chapter 18 Isometric Projection 29 Construction line Chapter 18 Isometric Projection 30 Visible line Chapter 18 Isometric Projection 31 32 Create construction lines first
Do not erase construction lines in this class
not erase construction lines in this class
33 34 35 36 37 Chapter 19 Oblique Projection 38 39 Compare 40 41 Practice
Practice
Freehand sketching of the followings:
th
1.
2.
3.
4. A square; side = 2 grids
A circle; diameter = 4 grids
A square; side = 6 grids
square; side
grids
A circle; diameter = 8 grids [need more than 8 arcs] On one graph paper
Freehand sketch do not use ruler to draw
Freehand sketch, do not use ruler to draw
Draw construction lines first and then draw visible lines (do not
erase construction lines)
Follow the guidelines described in Chapter 6
Ch II’
42 MAE 1004
MAE 1004 Bring pencils, eraser, and square graph paper
to every class 43 ...
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 Spring '11
 YShen
 Parallel projection, Stationery, Architectural drawing, Graphical projection

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