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Lecture 02
IENG 248:
Free Hand Sketching &
Intro to Solid Modeling
3/22/2016
Engineering Graphics & 3-D Modeling
D. H. Jensen
1
IENG
248
Texts & Materials
 Suggested:

Modern Graphics Communication, 4th ed.
 Giesecke, Mitchell, Spencer, Hill, Dygdon, Novak,
Lockhart & Goodman
 Available for rent via Amazon
 Make sure all appendix pages are intact
 Required:

Engineering Notebook
 7-1/2" x 9-3/4", quad ruled, 80 – 100 pp
 Available at the Bookstore, Staples, etc
 Anything that fits in this notebook is available for
exams
3/22/2016
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Materials
 Required:

Engineering Problems Paper/Pad
 five squares/division, 8-1/2 x 11, three hole drilled

Mechanical Pencil, 0.5 mm
 good grip

Lead
 HB, B

‘Clickable’ Eraser Pencil
 Plastic rather than rubber

Small Engineering Triangles
 30-60-90 and 45-45-90
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Example HW Assignment Layout
 No cover sheet req’d if heading blocks filled out

Use front side, never use back (grid is on the back side)
9/2/14
EIENG 248
CH X: 2.1, 2.2
A. STUDENT
PROB. 2.1
1
2
9/2/14
IENG 248
CH X:. 2.3, 2.4
A. STUDENT
2
2
PROB. 2.3
FULL-SECTION VIEW:
ISOMETRIC VIEW:
A
D
A
Øl
H
D
PROB. 2.2
H
ORTHOGRAPHIC MULTI-VIEW:
PROB. 2.4
Øl
D
SECT A-A
BROKEN-SECTION VIEW:
H
Øl
D
H
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Example Lab Cover Page Layout
 A cover sheet is always required for labs

Can be either handwritten or word-processed
9/2/14
ENGR 248
A. STUDENT
0
3
ENGR 248
LAB 1: TUTORIAL LESSONS 1-3
LAB 1: LESSONS 1 - 3
A. STUDENT
CONTENTS
CONTENTS
1: BLOCK SECTION
2: BLOCK ASSEMBLY
3: BLOCK DIMENSIONED
4: BLOCK ASSEMBLY
1: BLOCK SECTION
2: BLOCK ASSEMBLY
3: BLOCK DIMENSIONED
4: BLOCK ASSEMBLY
9/2/14
PAGE 0 OF 3
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Some Common Lines
 Visible Lines
 Construction Lines*
 Hidden Lines
 Center Lines
 Dimension Lines
 Extension Lines or
Section Lines
 Cutting Plane Lines**
 Phantom Lines
 Break Lines**
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Sketch Construction
 Block in ending, transition, and mid-points with
light construction lines
 Lines:


Horizontal strokes left to right (right handed)
Vertical strokes downward
 Curves:


Draw with a downward motion
Use enclosing rectangles, centerlines, cards/trammels
 Proportions (scaling, too):


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Divide and conquer with enclosing rectangles
Use exit and entry points of background grid
Engineering Graphics & 3-D Modeling
D. H. Jensen
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3/22/2016
Sketch Construction
Engineering Graphics & 3-D Modeling
D. H. Jensen
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Lettering
 Upper case, no serifs, even width line strokes
 Widths of letters:





1, I are one unit wide
W is eight units wide
TOM Q. VAXY set is six units wide
Remaining letter set is five units wide
Last two letters are almost as wide as they are tall
 Top portions of a letter are usually NOT as
wide/tall as bottom portions
 Space between adjacent letter strokes is even,
not the space between adjacent letter ‘envelopes’
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Engineering Graphics & 3-D Modeling
D. H. Jensen
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Purpose of Geo Construction
 Geometric construction techniques are
used for:

CAD feature creation

Layout of prototype parts for manufacture

CAD drawing creation using 2-D software or
manual drafting equipment*
* Compass, dividers, triangles, and T-square or
drafting arm
3/22/2016
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Geometric Construction/Modeling
 Terminology:

Points
 Lines
 Angles
 Triangles
 Quadrilaterals
 Polygons
 Circles
 Arcs
 Ellipses
 Ogee Curve
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Constructs
 Tangency
 Bisection
 Perpendicular / Right
 Orthogonal
 Oblique
 Radius
 Diameter
 Circumference
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Solid Types
 Polyhedra


X - agon is a 2-D
figure
X - ahedron is 3-D
 Key features:





 Prisms



3/22/2016

Faces
Parallelopiped
Truncated
Pyramid
Axis
Cylinder
Cone
Sphere
Torus
 Know how to generate
solids – you’ll do it
with SolidWorks
Engineering Graphics & 3-D Modeling
D. H. Jensen
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Boolean Operations
 Union

addition of material using primitives
 Difference

subtraction of material using complete
primitives
 Intersection

salvage of material common to two primitives
 Primitives are the basic solids (features)


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SolidWorks primitives are related to
manufacturing operations
ACIS primitives are related to geometric shape
Engineering Graphics & 3-D Modeling
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3/22/2016
Example
Engineering Graphics & 3-D Modeling
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Assignment
 HW02:

See links on Schedule page:
 Complete “Hands On 2.2”on photocopy
 Sketch Top and Front views of the “Boiler Stay” on
EP paper
 Complete, staple, and turn in with a cover page

Load SolidWorks & MasterCAM for SolidWorks
 See links on Materials page
 Takes about 2 hours
 May only be used from IER Building
 M, W, F: 1:00 – 5:30 PM
IER 310
 also Collaboration Space, Design Studio
3/22/2016
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