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Section Views
ME 123 Visualization and CAD Full Section
Front view Right side view in Full Section
Left side view
Hard to visualize. Compare with right side in section for readability
General Guidelines
• Use section lines to indicate “cut” material• Show all edges, not just “cut” material• No hidden lines except as needed for feature• Use object lines, not hidden lines, to outline
“cut” material• Section lines same direction on each part• Cutting plane line in adjacent view• Section lines normally at 45o
Lines in Sectioning
(a) (e)(d)(c)(b)CORRECT INCORRECTINCORRECTINCORRECT
Hidden Lines in Section Views
(A) (B)
Direction of Section Lines
INCORRECTCORRECT INCORRECT
Normaly the section lines are at 45 degrees, but not if a feature of the part is at 45 degrees.
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Section Hatch
Two Parts
Section lines at varying angles for different parts
Same part, same angle
Three Parts
Section Types
• Full• Offset• Half
• Removed• Revolved• Aligned
• Broken-Out
Full Section
Edge View of Cutting Plane
Top ViewCutting Plane
Line of Sight
Front View
Section Lines
Return to Section Types
Animation
Offset Section
Offset Line Not Shown
Top ViewRemoved Portion
Front View
Offset
Return to Section Types
Half Section
Remove One Quarter
Center Line(Hidden lines omitted unless used for dimensioning
Edge View of Cutting Plane
Cutting Plane
Return to Section Types
Removed Section
B
A
A
Section A-A
B
Return to Section Types
3
Revolved Section
Broken Around Section
Section in View
Revolved 90o
Front View
Top View
Pictorial View
Return to Section Types
Aligned Section
Section D-D
D
D
Return to Section Types
Broken-Out Portion
Cutting Plane
Break Line
Front View with Broken-Out Section
Broken-Out Section
Return to Section Types
Webs in Section
B B
A
A
(a) CORRECT (b) INCORRECT
(c) CORRECT
Full Section Example Half Section Example
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Offset Section Example
The holes go through
