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Introduction to Engineering Introduction to CAD

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Introduction to Engineering Introduction to CAD Agenda Introduction to Computer Aided Drafting Reference Design and 3-D Modeling IGCE Chapter 6, pg 159 - 169 – PowerPoint PPT presentation

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Title: Introduction to Engineering Introduction to CAD


1
Introduction to EngineeringIntroduction to CAD
  • Agenda
  • Introduction to Computer Aided Drafting
  • Reference
  • Design and 3-D Modeling
  • IGCE Chapter 6, pg 159 - 169
  • The CADKEY Project Book, 5th Edition- Chapter 1

2
Agenda
  • Concepts of CAD
  • Introduction to CADKEY getting familiar with
    CADKEY user interface
  • Creation of CADKEY Part file
  • Creation of blank seed drawing
  • Creation of title block pattern file

3
CAD Computer Aided Design (and Drafting)
  • CAD model is a computer representation of an
    object or part. It is a virtual part.
  • The model is an engineering document of record.
  • CAD programs are a means to develop a model, they
    include Cadkey, AutoCad, ProEngineer, Solidworks
    and more.

4
Simplest model in CAD is 2-D Model
  • Computer graphics equivalent to an orthographic
    projection created by hand.

5
2 ½ - D Model
  • Third dimension by extrusion of 2-D
  • Not very useful, very limiting

6
3-D Model
  • CAD software electronically stores the entire 3-D
    shape of the object.
  • 3-D drawings can be generated from a 2-D model by
    the program

7
Example Wireframe 3-D Model
8
Example 3-D Surface Model
9
Solids Modeling
  • Most sophisticated method has volume as well as
    surfaces and edges

10
Working with CADKEY in the lab
  • Save your work on your floppy or Zip disk
  • If the floppy disk is full, CADKEY does not warn
    while saving. It saves it as a 0 KB file. The
    file can no longer be used
  • Follow the instructions in the project book in
    order.
  • Dont skip around you may miss something
    important!
  • Try to complete the assignments in class.

11
Specifics about how CADKEY works
  • As set up for this class Color of line implies
    weight of line when printed (plotted) out.
  • Conventions are
  • .75 mm Visible Green (1) or Yellow (4)
  • .35 mm Hidden or Lettering Cyan (5)
  • .35 mm Centerlines Magenta (6)
  • .35 mm Dimension Section Magenta (6)
  • Always, ALWAYS, print through PRINT PREVIEW
  • Print black and white if on a printer outside of
    class.

12
Specifics about how CADKEY works
  • Changing Print from portrait to landscape
  • File
  • Print/Plot Setup
  • (choose orientation) Landscape OK
  • Printing through Print/Preview
  • File
  • Print/Plot Preview
  • Print Range (use default of all and one copy)
    OK
  • Cadkey Print/Plot Setup
  • Scale (10 smaller that default value OK
  • Accept (to Autocenter)
  • Print

13
Specifics about how CADKEY works
  • To configure computers outside classroom to print
    green yellow lines .7mm thick and cyan
    magenta lines .35mm thick
  • Click on TOOLS OPTIONS PRINT
  • In dialog box, type .07 for green yellow, and
    .035 for cyan magenta
  • Click OK

14
Todays Assignment
  • Work through Exercises of Chapter 1 The CADKEY
    User Interface
  • Take each step in order.
  • Do as much as you can today and finish tomorrow.
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