1. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-1 Chapter 3 Drawing Representation: Sectioning, welding and surface texture After studying this chapter you should be able to do the following: apply sectioning techniques to engineering drawings draw sectional views represent standard welding data and instructions on drawings indicate the application of surface texture requirements from machining and other processes on component drawings

2. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-2 Figure 3.1 – (a) General symbol for hatching; (b) aid for drawing hatching lines

3. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-3 Figure 3.2 – General application of hatching lines

4. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-4 Figure 3.3 – Special application of hatching lines

5. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-5 Figure 3.4 – Representation of a sectional view

6. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-6 Figure 3.5 – Sectional view with identification of cutting plane omitted

7. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-7 Figure 3.6 – Hatching of thin parts

8. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-8 Figure 3.7 – Exceptions to the general rule of sectioning

9. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-9 Figure 3.8 – Revolved and interposed sections

10. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-10 Figure 3.9 – Removed sections

11. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-11 Figure 3.10 – Part or local sections

12. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-12 Figure 3.11 – Aligned sections (note: in both examples the projection lines would not be shown on the finished drawing)

13. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-13 Figure 3.12 – Pictorial view of section

14. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-14 Figure 3.13 – Orthogonal view of section

15. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-15 Figure 3.14– Pictorial view of offset section

16. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-16 Figure 3.15 – Orthogonal view of offset section

17. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-17 Figure 3.16 – Pictorial view of half section

18. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-18 Figure 3.17 – Orthogonal view of half section

19. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-19 Figure 3.18 – Standard location of elements on a welding symbol

20. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-20 Figure 3.19 – Welding terminology

21. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-21 Figure 3.2 – Representation of the welding symbol

22. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-22 Figure 3.21 – Use of cranked arrow

23. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-23 Figure 3.22 – Surface texture terminology

24. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-24 Figure 3.23 – Surface roughness profile

25. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-25 Figure 3.24 – Surface roughness symbol

26. Copyright  2007 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 7e by Boundy 3-26 Figure 3.25 – Application of the surface texture symbol