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PTT 105/3 Engineering Graphics Lecture 1: Overview of Computer Aided Design (CAD) and Analysis

PTT 105/3 Engineering Graphics Lecture 1: Overview of Computer Aided Design (CAD) and Analysis. Prepared By: Nor Helya Iman Bt. Kamaludin Email: helya@unimap.edu.my. Outline. Engineering Drawing. Computer Aided Design (CAD). CAD. Tools in design process. Computer Aided Design.

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PTT 105/3 Engineering Graphics Lecture 1: Overview of Computer Aided Design (CAD) and Analysis

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  1. PTT 105/3Engineering GraphicsLecture 1: Overview of Computer Aided Design (CAD) and Analysis Prepared By: Nor HelyaIman Bt. Kamaludin Email: helya@unimap.edu.my

  2. Outline

  3. Engineering Drawing

  4. Computer Aided Design (CAD)

  5. CAD Tools in design process Computer Aided Design The integration of computer software and geometric model to serve the design process

  6. Design Process

  7. Contribution of CAD in design

  8. History

  9. Evolution of CAD

  10. Design Formats

  11. 3D Geometric Primitives

  12. CAD Software Product

  13. Advantages of CAD 1. 2. 3. 4.

  14. Advantages of CAD

  15. CAD Capability

  16. Characteristics of CAD(within scope of drawing creation)

  17. Practice of CAD(within scope of drawing creation)

  18. Basic Information Included in a Drawing

  19. Projected Views

  20. Dimensions

  21. A Dimensioning Example

  22. More basic information

  23. Full name Country Code USA American National Standard Institute ANSI มอก. Thailand สำนักงานมาตรฐานผลิตภัณฑ์อุตสาหกรรม Japanese Industrial Standard Japan JIS British Standard UK BS Australian Standard Australia AS Deutsches Institut fürNormung Germany DIN International Standards Organization ISO Standard Code

  24. Continuous thick line Visible line Dimension line Extension line Leader line Continuous thin line Dash thick line Hidden line Chain thin line Center line Basic Line Types Name according to application Types of Lines Appearance

  25. Meaning of Lines Visible lines represent features that can be seen in the current view Hidden lines represent features that can not be seen in the current view Center linerepresents symmetry, path of motion, centers of circles, axis of axisymmetrical parts Dimension and Extension linesindicate the sizes and location of features on a drawing

  26. Example : Line conventions in engineering drawing

  27. Precedence of coincide lines. Hidden line drawing. Center line drawing. Line Convention

  28. Precedence of Line Order of importance Visible line Hidden line Center line

  29. Hidden Line Practice Hidden line should join a visible line, except itextended from the visible line. Leave space Correct Join No !

  30. Hidden Line Practice Hidden line should intersect to form L and Tcorners. L Correct T No !

  31. Scaling

  32. Drawing Sheet A4 • Trimmed paper of a size A0 ~ A4. A3 A2 • Standard sheet size(JIS) • A4 210 x 297 • A3 297 x 420 • A2 420 x 594 • A1 594 x 841 • A0 841 x 1189 A1 A0 (Dimensions in millimeters)

  33. c d d c c Sheet size c (mm) d (mm) A4 10 25 A3 10 25 A2 10 25 A1 20 25 A0 20 25 Orientation of drawing sheet 1. Type X (A0~A4) 2. Type Y (A4 only) Drawing space Drawing space Border lines Title block Title block

  34. The End… Thank You..

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