2. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 1 Section Views Orthographic views showing all hidden lines may not be clear enough to describe an object’s internal details. This shortcoming can be overcome by imagining that part of the object has been cut away and shown in a cross- sectional view. This view is called a section view.

3. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 2 Type of Section Views Full section view Offset section view (multiple offset views) Half section view Broken section view Aligned and Revolved section views Removed view

4. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 3 Section View – Full Section

5. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 4 Section View – Offset Section Offset cutting plane

6. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 5 Section View – Multiple Offset Sections

7. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 6 Section View – Half Section

8. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 7 Section View – Broken Section

9. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 8 Section View – Aligned & Revolved Section

10. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 9 Section View Removed sections placed outside of the view Hatch lines

11. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 10 Section View – review All visible edges and contours behind the cutting plane should be shown. Hidden lines should be omitted in section views. A section view should always be bounded by a visible outline. There should be no lines in the hatched area. Section lines should be in the same direction. Use standard section lines (hatch) to show materials.

12. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 11 Homework #3 – Due Friday 9/29/06 page 265 (4 th edition) and page 272 (5 th edition) Problems 1 and 7 – Given the two views, front and right side, freehand sketch the missing view top, freehand sketch all three views. As an additional exercise, create an isometric view of the object page 407-410 (4 th ed.) and page 417-420 (5 th ed.) Problem 8.1 part B only, full section view (fig. 8.53) Problem 8.2 part Bonly, offset section view (fig. 8.54) Freehand sketch both views and convert the front view to a section view.

13. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 12 Breaks and Sectioning

14. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 13 ANSI Standard Section Lines for Various Materials ANSI-31 ANSI-133 ANSI-134 American National Standards Institute

15. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 14 Architectural Drawing Crosshatching patterns for various building materials that go into the construction of foundation, roof details, or wall sections.

16. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 15 AutoCAD Crosshatching

17. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 16 Auxiliary Views To visualize and solve problems involving inclined or oblique planes, one should draw views on other projection planes than the principal projection planes (front, top and right side).

18. Ken YoussefiMechanical and Aerospace Engineering Dept., SJSU 17 Auxiliary Views