ME2103 Ch 1 Introduction
description
Transcript of ME2103 Ch 1 Introduction
ME2103 Engineering Visualization & Modelling
by:
A/P Lee Kim SengRoom: EA 04-17Tel: 6516 [email protected]
http://courses.nus.edu.sg/course/mpeleeks/personal/index.htm
http://ivle.nus.edu.sg/cwb/website/ME2103
ME2103 Course Contents1. Introduction2. Introduction to SolidWorks3. Principles of Projection4. Sectioning and Dimensioning5. Isometric & Orthographic sketching6. Limits, Fits and Tolerances7. Convention and Symmetry8. Screw and Nuts Representation9. Keys, Coupling and Locking Devices10. Welding Symbols & Representations
A/P Lee Kim Seng
A/P Lee Kim Seng
A/P Lee Kim Seng
A/P Lee Kim Seng
A/P Lee Kim Seng
A/P Lee Kim Seng
A/P Lee Kim Seng
CAD Tutorials
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Grouping: A – N (14 groups)
Tuesday: I, J, K, L,Wednesday: A, B, C, D,Thursday: M, NFriday: E, F, G, H.
CAD TutorialsE2 03-08 (PC6) & E2 03-09 (PC7)
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How to register on-line?
Tuesday: I, J, K, L,Wednesday: A, B, C, D,Thursday: M, NFriday: E, F, G, H.
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50%
2 unseen CAD assignments20%(Qns to be given on the day)
Tutorials CT2- CT5 30%,
CAD50%
50%Total
On-line QuizMCQs(Early Nov)
CA
Tutorials
Course Quiz50%
ME 2103 Grading
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Consumer ProductsDesigned in SolidWorks
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Medical ProductsDesigned in SolidWorks
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Electronic ProductsDesigned in SolidWorks
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Basic Manual Drawing Instruments
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Basic Manual Drawing InstrumentsPencil (H or 2H for constructions, 2B for outlines)
Set square (30 & 45 deg)
Ruler & Scale Rule
Protractors
Compass or Instrument set
Eraser & Erasing shield
Radii & Circle templates
French curve & Flexible curve
T-square
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Basic Manual Drawing InstrumentsPencil (H or 2H for constructions, 2B for outlines)
Set square (30 & 45 deg)
Ruler & Scale Rule
Protractors
Compass or Instrument set
Eraser & Erasing shield
Radii & Circle templates
French curve & Flexible curve
T-square
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Lines
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Types of Lines and applications
Line Description General Application
Illustration
Continuous thick line
Visible outline & edges
Continuous thin line
Dimension lines & Projection/ Extension lines
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Types of Lines and applications
Leader lines
Hatching/Sectioning
Outline of revolve section
Line Description General Application
Illustration
Continuous thin line
Continuous thin line
Continuous thin line
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Types of Lines and applications
Dashed thin line
Hidden outlines & edges
Line Description General Application
Illustration
Chain thin line
Centre lines
Chain thick line
To indicate a surface that requires additional treatment.
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Types of Lines and applicationsLine Description General
ApplicationIllustration
Chain thin line with thick short lines at both ends
Symmetry lines
Continuous thin (straight) with zigzags
Long break lines
Continuous thick (freehand) line
Short break lines
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Types of Lines and applicationsLine Description General
ApplicationIllustration
Chain thin, thick at ends and changes of directions
Cutting planes
Chain thin double-dashed
Phantom lines
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Types of Lines Available in SolidWorks
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Drawing involving Complicated Hidden DetailDescription Correct Correct Illustration Incorrect
Hidden line begins with a dash, Not a space
Hidden lines intersect with no gap in between
Hidden lines intersect at corner with no gap in between
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Drawing involving Complicated Hidden Detail
Three hidden lines meet at the corner
Hidden line begins with a space as a continuation from a visible line
Invisible arc begins with a dash
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Drawing involving Complicated Hidden DetailHidden arc begins with a space as a continuation of a visible arc
Very small arc may be made solid
Two hidden arcs meet at the point of tangency
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Scale
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What is Scale?
1:1
2:1
1:2
Half Size (reduced)
1:2
Full Size
1:1
Double Size (enlarged)
2:1
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To Specify the Scale on a Drawing
For drawings, the scale indicates the ratio of the size of the drawing of the part or machine to its actual size.
Recommended practice:
1:1 for full size
1:2 for half size and similarly for other reductions
2:1 for double size and similarly for other enlargements
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Scale on a Drawing
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Drawings
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DrawingsInternational Designation
Dimension of drawing papers (mm)
A0 1189 x 841
A1 841 x 594
A2 594 x 420
A3 420 x 297
A4 297 x 210Standard paper sizes
Standard drawing paper dimensions.
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Examples of Drawings
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Example of Assembly
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Examples of Drawings: Exploded View
Bill of Materials
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Example: ME2103 drawing sheet
Default Settings:
• 3rd Angle Projection
• A4
• Landscape
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Title Block
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What is Title Block?1. Contains vital part and/or assembly
information (drawing scale, angle of projection, part name, tolerances etc…)
2. Each organization can have its own unique version of a title block although there are different standards of title blocks (ANSI, DIN, ISO, JIS etc..)
3. Usually situated at the base of the drawing sheet with a border enclosing the drawing views.
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Example: ME2103 title block
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Example: ANSI title block
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Example: DIN title block
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Example: ISO title block
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Example: JIS title block
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Construction
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Geometric Construction of // LineA. To Draw a Line Through a Point and Parallel to a Line
A
B
C
DP
Triangle may be used instead of ruler
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Geometric Construction of // LineB. To Draw a Line Parallel to a Line and at a Given Distance
G
H
A
B
E
Triangle may be used instead of ruler
R = CD
C D
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Geometric Construction of ⊥ Line
A BPC D
E
F
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Geometric Construction: Bisecting an Angle
DA
B
C
R
r
r
F
E
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Geometric Construction of PentagonA
B
CO DE
r
R
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Application of the Pentagon shape
Famous Defense Building in USA: The PentagonA/P Lee Kim Seng
Geometric Construction of HexagonA
B
C
F
D
E
RR
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Application of the Hexagon shape
Screws, Bolts and Nuts
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Construction of an Ellipse
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Construction of an EllipseMajor Axis Method
A B
1
2
34 5
E
Ffocus
Major axis
Minor axis
1/2 Major axis
1/2 Major axisA3 B3
1 2 3 4 5
C
D
A3 + B3 = AB (Major axis)
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Construction of an EllipseTwo Circles Method
Major axis
Minor axis
BA
C
D
30°
Z
Y
E
P
Q
F
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O
30°R
A
B
C
D
E
F
G
H
R
I
J
Construction of an Isometric Ellipse
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Construction of an EllipseParallelogram Method
A B
C
D
O Major axis
Minor axis
123
1
2
3
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Construction of an Ellipse
A B
C
D
Four-Centre Method
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Tangents
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Drawing Tangents to 2 Circles
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Tangents
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Tangents
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Tangents
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Tangents
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Tangents
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Tangents
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Tangents
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Tangents
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Examples of Geometric Construction
External CaliperA/P Lee Kim Seng
Examples of Geometric Construction
Internal Caliper
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Examples of Geometric Construction
SpannerA/P Lee Kim Seng
Examples of Geometric Construction
Special S-WrenchA/P Lee Kim Seng
Examples of Geometric Construction
Rocker ArmA/P Lee Kim Seng
Thank You
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