eng dwg 1011-1_wk1
DESCRIPTION
engneTRANSCRIPT
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Dr. Mohamed [email protected] Room: E0-3-078 i.e. E0 Building, Level 3 (corner directly opposite the lift)Tutors: …
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WEEK 1 Rules and RegulationsRules and Regulations Course Evaluation MethodCourse Evaluation Method Introduction to Engineering i.e. standards,
instruments, lettering, dimensioning, tolerance, etc.
Introduction to CADIntroduction to CAD Starting up AlibreStarting up Alibre Exploring Drawing WorkspaceExploring Drawing Workspace Setting up 2D Sketch:Setting up 2D Sketch: Unit & Grid SettingUnit & Grid Setting Basic Drawing FunctionBasic Drawing Function: :
Point/Line/Circle/Arc/Rectangle/Ellipse/Polygon/ Other Point/Line/Circle/Arc/Rectangle/Ellipse/Polygon/ Other ShapesShapes
DimensioningDimensioning
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Slide downloading
Please download from LMS
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RULES AND REGULATIONS NO internet allowed during class hour and hence
no downloading. Attendance must include PC no. If you move or
change places please indicate in the attendance sheet.
NO copying of other student’s assignment. NO late submission.
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METHOD OF EVALUATION
Quiz (1&2)Quiz (1&2) : 15%: 15% ProjectProject : 10%: 10% AssignmentAssignment : 20%: 20% Mid-termMid-term : 25%: 25% Final TestFinal Test : 30%: 30%
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Introduction to Engineering
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Engineering Drawing Basic
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Engineering Drawing Basic
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Engineering Drawing Basic
Note that word languages are inadequate for describing the SIZE, SHAPE and FEATURES completely as well as concisely.
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Engineering Drawing Basic
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Engineering Drawing Basic
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Engineering Drawing Basic
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Engineering Drawing Basic
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Engineering Drawing Basic
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Engineering Drawing Basic
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Engineering Drawing Basic
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Engineering Drawing Basic
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Engineering Drawing Basic
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Engineering Drawing BasicEngineering Drawing BasicSet-squares/trianglesSet-squares/triangles
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Engineering Drawing BasicEngineering Drawing BasicUse of T-square and Set squareUse of T-square and Set square
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Engineering Drawing BasicEngineering Drawing BasicUse of T-square and Set squareUse of T-square and Set square
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Engineering Drawing BasicEngineering Drawing Basic
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Engineering Drawing BasicEngineering Drawing Basic
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Engineering Drawing BasicEngineering Drawing Basic
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Engineering Drawing BasicEngineering Drawing Basic Drawing StandardsDrawing Standards
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Engineering Drawing BasicEngineering Drawing Basic Drawing StandardsDrawing Standards
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Engineering Drawing BasicEngineering Drawing Basic Drawing StandardsDrawing Standards
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Engineering Drawing BasicEngineering Drawing Basic Paper sizes
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Engineering Drawing BasicEngineering Drawing BasicOrientation of drawing sheet
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Engineering Drawing BasicEngineering Drawing BasicDrawing scales
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Engineering Drawing BasicEngineering Drawing BasicDrawing scales
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Engineering Drawing BasicEngineering Drawing Basic
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Engineering Drawing Basic Engineering Drawing Basic Meaning and Types of Lines
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Engineering Drawing Engineering Drawing Basic Basic Lettering
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Engineering Drawing Engineering Drawing Basic Basic Lettering
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Engineering Drawing Basic Engineering Drawing Basic Dimensioning
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Engineering Drawing Basic Engineering Drawing Basic Dimensioning
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Engineering Drawing Basic Engineering Drawing Basic Dimensioning
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Engineering Drawing Basic Engineering Drawing Basic Dimensioning
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Engineering Drawing Basic Engineering Drawing Basic Dimensioning
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Engineering Drawing Basic Engineering Drawing Basic Dimensioning
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Engineering Drawing Basic Engineering Drawing Basic Tolerance
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Engineering Drawing Basic Engineering Drawing Basic Tolerance
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Engineering Drawing Basic Engineering Drawing Basic Tolerance
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Introduction to Computer Aided Drafting
(CAD) CAD is just a system that allow user to create or modify CAD is just a system that allow user to create or modify mechanical/electrical/architecture drawings.mechanical/electrical/architecture drawings.
CAD has been introduced even prior to 1960’s. In the early CAD has been introduced even prior to 1960’s. In the early industrial development in 1960’s:industrial development in 1960’s: General Motors – DAC (Design Automated by Computer)General Motors – DAC (Design Automated by Computer) McDonnell Douglas – CADDMcDonnell Douglas – CADD
http://mbinfo.mbdesign.net/CAD-History.htmhttp://mbinfo.mbdesign.net/CAD-History.htm
At present, there are so many CAD software available in the At present, there are so many CAD software available in the market such as Autocad, CATIA, Solidworks, Pro. E, Unigraphics, I-market such as Autocad, CATIA, Solidworks, Pro. E, Unigraphics, I-DEAS and etc.DEAS and etc.
For this course this semester we are using– For this course this semester we are using– ALIBRE.ALIBRE.
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Where is CAD in Product Design Concept?
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Productivity (=Speed) increaseProductivity (=Speed) increase Support changeabilitySupport changeability
Do not have to redo entire drawing with each changeDo not have to redo entire drawing with each change
Ease CommunicationEase Communication With other design teamWith other design team With other applications (CAE/FEM/CAM)With other applications (CAE/FEM/CAM) Marketing (realistic product presentationMarketing (realistic product presentation
Better Visualization of DrawingsBetter Visualization of Drawings AnalysisAnalysis Simulation and Testing of DesignSimulation and Testing of Design
Major benefit of CAD
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StartEngineering Sketch
Setting
dim
2D 3D
AnnotationsDimensions
Output
Holes, Draft, Rib, Fillet, etcPad, Shafts, Pocket etc.
Unit, Grid (snap), etc
Circle, Point, Line, Arc,
Spline, Revolve, Corner, etc.
CAD File Drawing (dxf)
A Standard Cad Process
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GETTING STARTEDGETTING STARTED
with Alibre CAD softwarewith Alibre CAD software
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Outline Introduction to CADIntroduction to CAD Starting up AlibreStarting up Alibre Exploring Drawing WorkspaceExploring Drawing Workspace Setting up 2D Sketch:Setting up 2D Sketch: Unit & Grid SettingUnit & Grid Setting Basic Drawing FunctionBasic Drawing Function: :
Point/Line/Circle/Arc/Rectangle/Ellipse/Polygon/ Other Point/Line/Circle/Arc/Rectangle/Ellipse/Polygon/ Other ShapesShapes
DimensioningDimensioning
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ALIBRE
There are There are 4 specified workspaces4 specified workspaces in Alibre in Alibre that consist of that consist of set of toolsset of tools, which allow the , which allow the user to perform the specific design tasks in a user to perform the specific design tasks in a particular area. particular area.
The basic workspaces that we going to learn The basic workspaces that we going to learn in this course are :in this course are :
1.1. New Part = Sketching and Part DesignNew Part = Sketching and Part Design2.2. New AssemblyNew Assembly3.3. New DrawingNew Drawing4.4. New Bill of MaterialsNew Bill of Materials
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New Part Window
Home Window
Double Click the Alibre Design iconDouble Click the Alibre Design icon Ignore Pop-up tutorial icons.Ignore Pop-up tutorial icons. 2 windows appear = Home and New Part (do not cancel 2 windows appear = Home and New Part (do not cancel
Home Window)Home Window)
Getting Started with ALIBRE
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Opening New Part Workplace
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Des
ign
Expl
orer
Tool
s or
func
tions
icon
s
Information
Menu bar
Work Area
Exploring Drawing Workspace
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Exploring Drawing Workspace
Setting Measurement UnitSetting Measurement Unit File File Properties Properties Units Units
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Exploring Drawing Workspace
Setting GridSetting Grid ToolsTools Options Options GridGrid
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Setting Colour Sheme (option)Setting Colour Sheme (option) Tools Tools Options Options Colour Scheme tab Colour Scheme tab Select Select
Very Light Background SchemeVery Light Background Scheme
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Drawing a Sketch
In general terms, a sketch is defined as the basic contour for the feature drawn on a sketch plane.
Sketch of a spanner 3D feature of the spanner
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ALIBRE default sketch planes:1.Front XY-plane2.Top ZX-plane3.RIGHT YZ-plane
XY-plane
YZ-plane
ZX-plane
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Choose which plane to draw on: Choose which plane to draw on: by default XY planeby default XY plane Click on the 2D Sketch iconClick on the 2D Sketch icon
1. Choose a Plane
2. Click on 2D icon
Choosing a plane
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Sketch/Drawing Workspace window
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Drawing Snap to Grid
Point of selection can Point of selection can be located at be located at intersection of gridintersection of grid
Points of lines are snapped to grid. Size of figure will follows the grid dimension
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Sketching ToolsSketching is the basic mode of drawing. These tools are the basic drawing tools in Alibre.
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Sketch Sketch workspace workspace windowwindowSketcher Tools
Curve drawing tools
Constraint tools
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Sketch Node
Sketch Node: Creating a point anywhere in the work area
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Drawing a Line
Select Line Icon.Select Line Icon. Click Start point on Click Start point on
Drawing window.Drawing window. Click Next point.Click Next point. Click Line Icon again to Click Line Icon again to
terminate the terminate the operationoperation
Line
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Line: Creating line by specifying the start and end point
Reference Line: similar to line only that the sketch will not be considered during part design
Line contd.
LineReference Line
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Modify a Line
Select Icon
Click Select Icon to change cursor to Selection modeSelect and Click a line to modify.
Modification functions:•To delete a line press Delete on Keyboard
• To move a line click on the line and drag to another position.
•To Change a point click at a point and drag
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CircleCircle: Creating circle by specifying centre point and end point
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Drawing a Arc
Three are 3 Methods to Three are 3 Methods to draw arc:draw arc:Center, Start, EndCenter, Start, EndStart, End RadiusStart, End RadiusTangent, Start, EndTangent, Start, End
Tangent, Start, End procedure:•Select Tangent, Start, End Icon•Select (a body of ) a reference curve •Click Start point•Click end point
Start point of arc will be tangent to reference curve
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Circular Arc
Creating arc or half circle by specifying: Circular Arc 1: Center, Start, EndCircular Arc 2: Start, End, RadiusCircular Arc 3: Tangent-Start, End
C/A 1 C/A 2 C/A 3
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Ellipse
An ellipse is drawn by specifying its center point and two ellipse axes
Major axisMin
or a
xis
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Ellipse Arc
Similar to drawing an ellipse and identifying the start and end point of the ellipse arc.
Similar to ellipse
centre point and 2 axis
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Drawing a B-spline
B-Spline or splineB-Spline or spline
Interpolation point
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Drawing Spline by Interpolation point
Select B-Spline by Select B-Spline by Interpolation point Interpolation point iconicon
Click a pint Click a pint Continue to next pointContinue to next point Double click or click B-Double click or click B-
spline icon to spline icon to terminateterminate
1st
2ndother
End point, Terminate by double click
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Drawing Shape Templates
Rectangle by 2 Corners: Creating rectangle parallel to its vertical and horizontal axis
Rectangle by 3 Corners: Creating an inclined rectangle.
Regular Polygon: Creating a shape by specifying the centre point, radius and number of sides (>3) it has.
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Other Sketching Tools
Select
Dimension
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Turning Regular element into Reference Figure
A reference element is used as an indicator to help draw the A reference element is used as an indicator to help draw the sketch. It does not have any impact during Part Design.sketch. It does not have any impact during Part Design.
Right click the regular element
New reference element
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Practice problem 1-1In this practice, you are required to draw the sketch (Figure B) of the model shown in Figure A, using Line, Arc and Circle tools. Do not dimension the sketch. The solid model is given only for your reference.
Figure A: Solid Model for Practice 1-2 Figure B: Sketch of Model
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Class Assignment1-W1 Save as: c1w1-matricno.AD_PRT
Draw the sketch is shown in the Figure below. Complete the drawing with correct dimensions and determine the length MA.
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Class Assignment1-W1 Save as: c2w1-matricno.AD_PRT
Draw the template shown in the Figure below with correct dimensions using all the tools that you have learned previously. Dimensions in mm. Dimensions in inches.