ERT 249 Computer Aided Design (CAD) For Biosystem Engineering Prepared By: Samera binti Samsuddin...
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Transcript of ERT 249 Computer Aided Design (CAD) For Biosystem Engineering Prepared By: Samera binti Samsuddin...
![Page 1: ERT 249 Computer Aided Design (CAD) For Biosystem Engineering Prepared By: Samera binti Samsuddin Sah Email: samera@unimap.edu.my Phone: 04-9798835/016-4144537.](https://reader036.fdocuments.in/reader036/viewer/2022062322/56649e535503460f94b492b5/html5/thumbnails/1.jpg)
ERT 249ERT 249CComputer Aided Design omputer Aided Design
(CAD)(CAD)For Biosystem For Biosystem EngineeringEngineering
Prepared By:Prepared By:
Samera binti Samsuddin SahSamera binti Samsuddin Sah
Email: [email protected]: [email protected]
Phone: 04-9798835/016-Phone: 04-9798835/016-41445374144537
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Learning OutcomesLearning Outcomes
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Assessment and GradingAssessment and Grading
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HistoryHistory
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Evolution of CADEvolution of CAD
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IntroductionIntroduction
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Engineering DrawingEngineering Drawing
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Computer Aided Design Computer Aided Design (CAD)(CAD)
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Computer Aided DesignComputer Aided Design
Computer software
Geometric Modelling
CAD
Tools in design
process
The integration of computer software and geometric model to serve the design process
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Design ProcessDesign Process
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Contribution of CAD in Contribution of CAD in designdesign
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Design FormatsDesign Formats
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3D Geometric Primitives3D Geometric Primitives
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CAD Software ProductCAD Software Product
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Advantages of CADAdvantages of CAD
1.
2.
3.
4.
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Advantages of CAD
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CAD CapabilityCAD Capability
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Limitation of CADLimitation of CAD(within scope of drawing creation)(within scope of drawing creation)
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Limitation of CADLimitation of CAD(within scope of drawing (within scope of drawing
creation)creation)
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Limitation of CADLimitation of CAD(within scope of drawing (within scope of drawing
interpretation)interpretation)
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Basic Information Basic Information Included in a DrawingIncluded in a Drawing
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Projected ViewsProjected Views
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A Table ExampleA Table Example
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DimensionsDimensions
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A Dimensioning ExampleA Dimensioning Example
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More basic informationMore basic information
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ISO International Standards Organization
Standard CodeStandard Code
ANSI American National Standard InstituteUSA
JIS Japanese Industrial StandardJapan
BS British StandardUK
AS Australian StandardAustralia
Deutsches Institut für NormungDINGermany
Country Code Full name
มอก. สำ��นั�กง�นัม�ตรฐ�นัผลิ�ตภั�ณฑ์�อ�ตสำ�หกรรมThailand
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Basic Line Types Basic Line Types
Types of Lines AppearanceName according
to application
Continuous thick line Visible line
Continuous thin line Dimension line
Extension line
Leader line
Dash thick line Hidden line
Chain thin line Center line
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Visible linesVisible lines represent features that can be seen in the
current view
Meaning of LinesMeaning of Lines
Hidden linesHidden lines represent features that can not be seen in
the current view
Center lineCenter line represents symmetry, path of motion, centers
of circles, axis of axisymmetrical parts
Dimension and Extension linesDimension and Extension lines indicate the sizes and
location of features on a drawing
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ExampleExample : : Line conventions in engineering drawingLine conventions in engineering drawing
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Line ConventionLine Convention
Precedence of coincide lines.
Hidden line drawing.
Center line drawing.
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Precedence of LinePrecedence of Line
Visibleline
Visibleline
Order ofimportance
Hiddenline
Hiddenline
Centerline
Centerline
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Hidden Line PracticeHidden Line Practice
Hidden line should join a visible line, except itextended from the visible line.
Correct
No !
Join
Leavespace
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Correct No !
Hidden line should join a visible line, except itextended from the visible line.
Leavespace
Leavespace
Hidden Line PracticeHidden Line Practice
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Hidden line should intersect to form L and Tcorners.
Correct
No !
L T
Hidden Line PracticeHidden Line Practice
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Hidden arcs should start on a center line.
Hidden Line PracticeHidden Line Practice
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Centre Line PracticeCentre Line Practice
In circular view, short dash should cross at the
intersections of center line.
For small hole, center line is presented as thin
continuous line.
Center line should not extend between views.
Leave space Leave space
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Leave the gap when centerline forms a
continuation with a visible or hidden line
Leavespace
Leavespace
Leavespace
Leavespace
Center line should always start and end with
long dash.
Centre Line PracticeCentre Line Practice
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ScalingScaling
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Drawing SheetDrawing Sheet
•Trimmed paper of a size A0 ~ A4.
•Standard sheet size (JIS)
A4 210 x 297
A3 297 x 420
A2 420 x 594
A1 594 x 841
A0 841 x 1189
A4
A3
A2
A1
A0
(Dimensions in millimeters)
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Drawing space Drawingspace
Title block
d
d
c
c
cBorder lines
1. Type X (A0~A4) 2. Type Y (A4 only)
Orientation of drawing sheetOrientation of drawing sheet
Title block
Sheet size c (mm) d (mm) A4 10 25 A3 10 25 A2 10 25 A1 20 25 A0 20 25
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The end…