1. First-Year Engineering Program 1AU 2006 Engineering H191 Engineering Fundamentals and Laboratory I Week 01 Day 01 Graphics: The Language of Design

2. First-Year Engineering Program 2AU 2006 Objectives Understanding graphics as a communication tool Technical sketching Projections –Orthographic –Pictorial Sketching hints Lettering

3. First-Year Engineering Program 3AU 2006 How Would You Describe This? In teams of two, describe using only words How effective is this approach?

4. First-Year Engineering Program 4AU 2006 Freehand sketches Instrument drawings Computer drawings and models Three Basic Types of Technical Drawings

5. First-Year Engineering Program 5AU 2006 Introduction to Projections Present 3-D objects with 2-D media Two Basic Categories Orthographic Pictorial

6. First-Year Engineering Program 6AU 2006 Projections: Four Basic Types Orthographic Projections Axonometric ObliquePerspective Pictorials

7. First-Year Engineering Program 7AU 2006 Orthographic Projections Collection of 2D drawings Accurately represent object Technical Graphics - Chapter 3

8. First-Year Engineering Program 8AU 2006 Orthographic Projection

9. First-Year Engineering Program 9AU 2006 Defining the Six Principal Views or Orthographic Views

10. First-Year Engineering Program 10AU 2006 Which Views to Present? General Guidelines –Pick a Front View that is most descriptive of object –Normally the longest dimension is chosen as the width (or depth) –Most common combination of views is to use: Front, Top, and Side View –Views other than the Principal Views are called Auxiliary Views (see 3.15 in the Technical Graphics text)

11. First-Year Engineering Program 11AU 2006

12. First-Year Engineering Program 12AU 2006 Conventional Orthographic Views Height Depth Width Front View Top View Right Side View

13. First-Year Engineering Program 13AU 2006 Hidden Lines – represent features that cannot be seen in the current view Centerlines – represent symmetry and mark the center of circles, the axes of cylinders, and the axes of symmetrical parts, such as bolts Hidden and Center Lines in Orthographic Projections Object Lines – represent visible features for an object

14. First-Year Engineering Program 14AU 2006 For Example: 1. Visible 2. Hidden 3. Center

15. First-Year Engineering Program 15AU 2006 Front View Right Side View Top View Creating the Orthographic Projection Sketch

16. First-Year Engineering Program 16AU 2006 Step 1 – Lightly Block Three Views Use very light lines for drawing in the construction lines

17. First-Year Engineering Program 17AU 2006 Step 2 – Lightly Block Major Features Use very light lines for drawing in the construction lines Holes Arcs Cutouts

18. First-Year Engineering Program 18AU 2006 Step 3 – Refine and Locate Features in All Views Use very light lines for drawing in the construction lines

19. First-Year Engineering Program 19AU 2006 Step 4 – Add Final Lines Use very light lines for drawing in the construction lines

20. First-Year Engineering Program 20AU 2006 Completed Sketch

21. First-Year Engineering Program 21AU 2006 Add Another View Sketch the left side view of the object Compare your view with the others at your table

22. First-Year Engineering Program 22AU 2006 Add Another View Does yours look something like this?

23. First-Year Engineering Program 23AU 2006 Lettering Notes Lettering Guidelines – Technical Graphics: Chapter 1 Lettering Styles –Shape of Letters –Order of drawing lines Character Uniformity Spacing

24. First-Year Engineering Program 24AU 2006 Lettering – Vertical Gothic Font

25. First-Year Engineering Program 25AU 2006 Sketching Tips: General Relax and draw in a direction comfortable to you Mark end points of the lines to be sketched and draw between them Draw long lines as a series of short ones Use grid paper when available Follow sketching and text conventions Do NOT use a straight edge to draw lines!

26. First-Year Engineering Program 26AU 2006 Sketching Tips: Construction Lines Use construction lines Begin by drawing bounding boxes with construction lines Make construction lines much lighter and thinner than finished lines Identify the major features and overall dimensions Leave construction lines on the sketch

27. First-Year Engineering Program 27AU 2006 Sketching Tips: Miscellaneous Do not shade the drawing – this is not pencil sketching Title information is required Keep views aligned (very important) Include centerlines on isometrics Avoid labels on the sketch Draw neat circles – change page orientation if needed

28. First-Year Engineering Program 28AU 2006 Today's Assignment Drawing 1: –Blocks of each kind will be handed out at each table to sketch from. Drawing 2: –Lettering assignment handed out in class. –An additional copy will be in your course packet from Uniprint