Eng dwg 1011-1_wk1

Dr. Mohamed [email protected] Room: E0-3-078 i.e. E0 Building, Level 3 (corner directly opposite the lift)Tutors: …

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

Slide downloading

Please download from LMS

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.

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%

Introduction to Engineering

Engineering Drawing Basic

Engineering Drawing Basic

Engineering Drawing Basic

Note that word languages are inadequate for describing the SIZE, SHAPE and FEATURES completely as well as concisely.

Engineering Drawing Basic

Engineering Drawing Basic

Engineering Drawing Basic

Engineering Drawing Basic

Engineering Drawing Basic

Engineering Drawing Basic

Engineering Drawing Basic

Engineering Drawing Basic

Engineering Drawing Basic

Engineering Drawing BasicEngineering Drawing BasicSet-squares/trianglesSet-squares/triangles

Engineering Drawing BasicEngineering Drawing BasicUse of T-square and Set squareUse of T-square and Set square

Engineering Drawing BasicEngineering Drawing BasicUse of T-square and Set squareUse of T-square and Set square

Engineering Drawing BasicEngineering Drawing Basic

Engineering Drawing BasicEngineering Drawing Basic

Engineering Drawing BasicEngineering Drawing Basic

Engineering Drawing BasicEngineering Drawing Basic Drawing StandardsDrawing Standards

Engineering Drawing BasicEngineering Drawing Basic Drawing StandardsDrawing Standards

Engineering Drawing BasicEngineering Drawing Basic Drawing StandardsDrawing Standards

Engineering Drawing BasicEngineering Drawing Basic Paper sizes

Engineering Drawing BasicEngineering Drawing BasicOrientation of drawing sheet

Engineering Drawing BasicEngineering Drawing BasicDrawing scales

Engineering Drawing BasicEngineering Drawing BasicDrawing scales

Engineering Drawing BasicEngineering Drawing Basic

Engineering Drawing Basic Engineering Drawing Basic Meaning and Types of Lines

Engineering Drawing Engineering Drawing Basic Basic Lettering

Engineering Drawing Engineering Drawing Basic Basic Lettering

Engineering Drawing Basic Engineering Drawing Basic Dimensioning

Engineering Drawing Basic Engineering Drawing Basic Dimensioning

Engineering Drawing Basic Engineering Drawing Basic Dimensioning

Engineering Drawing Basic Engineering Drawing Basic Dimensioning

Engineering Drawing Basic Engineering Drawing Basic Dimensioning

Engineering Drawing Basic Engineering Drawing Basic Dimensioning

Engineering Drawing Basic Engineering Drawing Basic Tolerance

Engineering Drawing Basic Engineering Drawing Basic Tolerance

Engineering Drawing Basic Engineering Drawing Basic Tolerance

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.

Where is CAD in Product Design Concept?

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

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

GETTING STARTEDGETTING STARTED

with Alibre CAD softwarewith Alibre CAD software

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

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

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

Opening New Part Workplace

Des

ign

Expl

orer

Tool

s or

func

tions

icon

s

Information

Menu bar

Work Area

Exploring Drawing Workspace

Exploring Drawing Workspace

Setting Measurement UnitSetting Measurement Unit File File Properties Properties Units Units

Exploring Drawing Workspace

Setting GridSetting Grid ToolsTools Options Options GridGrid

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

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

ALIBRE default sketch planes:1.Front XY-plane2.Top ZX-plane3.RIGHT YZ-plane

XY-plane

YZ-plane

ZX-plane

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

Sketch/Drawing Workspace window

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

Sketching ToolsSketching is the basic mode of drawing. These tools are the basic drawing tools in Alibre.

Sketch Sketch workspace workspace windowwindowSketcher Tools

Curve drawing tools

Constraint tools

Sketch Node

Sketch Node: Creating a point anywhere in the work area

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

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

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

CircleCircle: Creating circle by specifying centre point and end point

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

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

Ellipse

An ellipse is drawn by specifying its center point and two ellipse axes

Major axisMin

or a

xis

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

Drawing a B-spline

B-Spline or splineB-Spline or spline

Interpolation point

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

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.

Other Sketching Tools

Select

Dimension

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

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

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.

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.