ENG 004 Lecture 17, Nov 27, 2012
Announcements
- Homework #7 due on Thursday
- Read Chapter 8
Topics
Section Views
Section Views
- Sections are used to clarify interior construction that cannot be
clearly described by hidden lines in exterior views.
- Section views are obtained by an imaginary cutting plane passed through
the object perpendicular to the line of sight.
- The portion of the object between the cutting plane and the observer is
assumed to be removed and section lines indicate the exposed surfaces.
- Hidden lines behind the cutting plane are omitted in section
views.
- The cut surfaces are indicated using cross
hatching
Section Views
Cutting Plane Lines
Cutting Plane Lines
Hatch Styles
Full Section View
Full Section View Process
Hidden Lines
Edges
Multiple Sections
Half Section
Used to show features of 1/2 the part (usually these parts have circular
symmetry)
Offset Section
Used to include features not found on a single plane but on parallel
planes.
Broken Views
Shows only a small portion of the part's interior
Conventional Breaks
Conventional Break Symbols
Revolved View
Show the internal features of a part in one of the standard views.
Removed View
Shows internal features along the length of a part
Multiple Removed Views
Aligned Views
Used to show features not on a single cutting plane, nor parallel cutting
planes, but on cutting planes that intersect through a single axis
Ribs, Webs, Lugs, Flanges
Webs
Aligned Lugs
Aligned Ribs
Aligned Spokes
Alternate Web Section
Sectioned Assemblies
Standard Parts
Thin Parts
Section Example
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