Engineering Drawings: Sectioning · 2014. 5. 27. · the maln m drawings in this THE FULL SECTIONAL...
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Engineering Drawings: Sectioning A short series of lectures on Engineering Drawing as Part of ENGG1960 By Paul Briozzo
Transcript of Engineering Drawings: Sectioning · 2014. 5. 27. · the maln m drawings in this THE FULL SECTIONAL...
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Engineering Drawings:Sectioning
A short series of lectures on Engineering Drawing as Part of ENGG1960By Paul Briozzo
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Sectioning
• Features that cannot be seen by hidden detail• Cutting plane removes part section is what is left• Cross hatching is at 45o equispaced• Centrelines often used for cutting planes• Very thin sections not hatched e.g. gaskets, seals• Do not show hidden detail in sectional view (except for special features)• Webs, Shafts, bolts and pins are usually NOT sectioned even if they are in
the cutting plane
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Rules to Remember When Sectioning
• A sectional view shows the part of the component in front of the cutting plane arrows. In third‐angle projection the sectional view is placed on the side behind the sectioning viewing plane.
• Material which has been cut by the cutting plane is hatched. Standard exceptions are noted previously.
• A sectional view must not have any full lines drawn over hatched areas.
• As a general rule, dimensions are NOT inserted in hatched areas.
