Sections 7 - MET 100 Sections Manish Mittal, Instructor Old...

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    MET 100 Sections Manish Mittal, Instructor Old Dominion University
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    Section Views Traditional sections views are based on the  use of an imaginary  cutting plane  that cuts  through the object to reveal interior features.
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    Sectional drawings  Section views are a  very important aspect of  design and  documentation and are  used to improve clarity  and reveal interior  features of parts
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    Section Views The use of  sectioned technical  illustrations is a  common practice to  describe interior  features of  complicated  assemblies.
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    Section Views Normally, hidden lines  are omitted from section  views. Adding hidden  lines to a section view  complicates the  drawing, defeating the  purpose of clarifying  with a section.
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    Visible surfaces and  edges representing  changes of planes that  are behind the cutting  plane are drawn in a  section view. Section  lined areas are bounded  by visible lines and  never by hidden lines,  because the bounding  lines are visible in the  section view.
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    The direction the cutting plane arrows points  represents the direction of sight for producing a  section view.  The direction of the arrow can also be thought of as  pointing toward the half of the object being kept. 
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    Half of the object is  "removed" to reveal the  interior features of the part.  The line of sight for the  section view is perpendicular  to the cut surfaces, which  means they are drawn true 
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Sections 7 - MET 100 Sections Manish Mittal, Instructor Old...

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