Ch08

Copyright 2002 McGraw-Hill Australia Pty Ltd PPTs t/a Engineering Drawing 6eby Bert Boundy

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Chapter Eight –Intersections &

development of surfacesAfter studying this chapter and working through the problems you should be able to do the following:

• constant parallel line developments of prisms and cylinders

• construct radial line developments of pyramids and cones

• draw the line of intersection between geometric surfaces and construct their development

• construct the development of transition pieces using traingulation


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Figure 8.1 –Regular right prism


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Figure 8.2 –Truncated right prism


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Figure 8.3 –Rectangular prism pipe elbow


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Figure 8.4 –Hexagonal prism


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Figure 8.5 – Truncated hexagonal right prism


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Figure 8.6 –Oblique hexagonal prism


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Figure 8.7 – Line of intersection of cylinder and cone—element method


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Figure 8.8 – Line of intersection of cylinder and cone—cutting plane method


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Figure 8.9 – Line of intersection of cylinder and cone—common sphere method


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Figure 8.10 –Right cylinder


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Figure 8.11 –Truncated right cylinder


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Figure 8.12 –Oblique cylinder


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Figure 8.13 – Development of a four-piece elbow


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Figure 8.14 – Oblique T

piece—equal diameter cylinders


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Figure 8.15 – Offset T piece

—unequal diameter cylinders


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Figure 8.16 – Oblique cylindrical connecting pipe


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Figure 8.17 – Alternative method of determining the line of intersection


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Figure 8.18 – Right pyramid


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Figure 8.19 – Oblique pyramid—whole and truncated


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Figure 8.20 – Right cone


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Figure 8.21 – Right cone truncated parallel to the base


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Figure 8.22 – Right cone truncated at an angle to the base


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Figure 8.23 – Right cone-vertical cylinder intersection


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Figure 8.24 – Truncated right cone-right cylinder intersection


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Figure 8.25 – Right cone-right cylinder oblique intersection


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Figure 8.26 – Oblique cone —whole and truncated


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Figure 8.27 – Oblique cone-oblique cylinder intersection


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Figure 8.28 – Breeches piece —equal angle, equal diameters


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Figure 8.29 – Breeches piece —unequal angle, equal diameters


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Figure 8.30 – Breeches piece —cylinder and two cones, equal angle


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Figure 8.31 – Square-to-rectangle transition piece


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Figure 8.32 – Round-to-round transition piece


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Figure 8.33 – Square-to-round transition piece


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Figure 8.34 – Oblique hood


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Figure 8.35 – Rectangle-to-

rectangle, angular offset

transitionpiece

Ch08

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Ch08