sectional view
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Sectional Views
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A-A
A A
Cutting –plane line
Projectiondirection
Name
A A
A A
Section A-A
Example 1 front view ->full section?
A B
C D
Example 2 front view ->full section?
HALF SECTION
ALIGNED SECTION
ALIGNED SECTION
ALIGNED SECTION
ALIGNED SECTION
OFFSET SECTION
OFFSET SECTION
OFFSET SECTION
REVOLVED SECTION
Only sketch section surface
REVOLVED SECTION
Only sketch section surface
REMOVED SECTION
REMOVED SECTION
Only sketch section surface
A A
FULL SECTION (Rib)
FULL SECTION
Hidden lines omitted
FULL SECTION
Hidden lines omitted
FULL SECTION
FULL SECTION
Hidden lines omitted
FULL SECTION
HALF SECTION
Hidden lines omitted
HALF SECTION
HALF SECTION
Hidden lines omitted
BROKEN-OUT SECTION
Hidden lines omitted
Hidden lines omitted
Section lines-thin!!
Contour,45
Center line ,45Contour,45
Center line,45
attention
line
No line
attention
attention
Hidden line should be omitted!!!
model
views
2.half sections
top
bottom
2.half sections
Cutting plane
remove
2.half sections
direction
Half section Half section
symmetry
2.half sections
symmetry
label
2.half sections hidden？
Notice: the direction
of section lines
2.half sections
2.half sections
example
External Short break lines (thick)
model
3.Broken-out sections
model
Section plane？
3.Broken-out sections
example
模型
Cutting position
Name
3.Broken-out sections
label
falsefalse
false
false
3.Broken-out sections
attention
Two intersecting planes
Move away
A A
A
A-A
label
4.aligned sections
4.aligned sections
5.offset sections
position
5.offset sections
Section plane
A
A
A-A
B
B
6.inclined sections
7.revolved sections
8.removed sections
A
A
A-A
8.removed sections
9. Ribs in sections
To avoid a false impression of thickness and solidity,
ribs, webs, gear teeth, and other similar flat features are not
sectioned even though the cutting plane passes along the
center plane of the feature.
ribs
……..Cutting plane passes along the center plane of the
feature.
Ribs in sections
Vertical section
Ribs in sections
To shorten a view of an elongated object, conventional breaks are recommended
Space is limited & object is symmetry == partial views
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