Download - Chapter 7 Sectional Views
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Chapter 7 Sectional Views
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A-A
A A
Cutting –plane line
Projectiondirection
Name
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A A
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A A
Section A-A
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Example 1 front view ->full section?
A B
C D
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Example 2 front view ->full section?
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HALF SECTION
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ALIGNED SECTION
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ALIGNED SECTION
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ALIGNED SECTION
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ALIGNED SECTION
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OFFSET SECTION
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OFFSET SECTION
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OFFSET SECTION
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REVOLVED SECTION
Only sketch section surface
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REVOLVED SECTION
Only sketch section surface
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REMOVED SECTION
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REMOVED SECTION
Only sketch section surface
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A A
FULL SECTION (Rib)
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FULL SECTION
Hidden lines omitted
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FULL SECTION
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Hidden lines omitted
FULL SECTION
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FULL SECTION
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Hidden lines omitted
FULL SECTION
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HALF SECTION
Hidden lines omitted
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HALF SECTION
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HALF SECTION
Hidden lines omitted
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BROKEN-OUT SECTION
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Hidden lines omitted
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Hidden lines omitted
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Section lines-thin!!
Contour,45
Center line ,45Contour,45
Center line,45
attention
Chapter 7 section views
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line
No line
attention
Chapter 7 section views
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attention
Chapter 7 section views
Hidden line should be omitted!!!
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model
views
Chapter 7 section views
2.half sections
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top
bottom
Chapter 7 section views
2.half sections
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Cutting plane
remove
Chapter 7 section views
2.half sections
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direction
Half section Half section
symmetry
Chapter 7 section views
2.half sections
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symmetry
label
Chapter 7 section views
2.half sections hidden?
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Notice: the direction
of section lines
Chapter 7 section views
2.half sections
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Chapter 7 section views
2.half sections
example
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External Short break lines (thick)
model
Chapter 7 section views
3.Broken-out sections
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model
Section plane?
Chapter 7 section views
3.Broken-out sections
example
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模型
Cutting position
Name
Chapter 7 section views
3.Broken-out sections
label
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falsefalse
false
false
Chapter 7 section views
3.Broken-out sections
attention
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Two intersecting planes
Move away
A A
A
A-A
label
Chapter 7 section views
4.aligned sections
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Chapter 7 section views
4.aligned sections
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Chapter 7 section views5.offset sections
position
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Chapter 7 section views
5.offset sections
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Section plane
A
A
A-A
B
B
Chapter 7 section views
6.inclined sections
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Chapter 7 section views
7.revolved sections
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Chapter 7 section views
8.removed sections
A
A
A-A
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Chapter 7 section views
8.removed sections
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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.
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ribs
![Page 59: Chapter 7 Sectional Views](https://reader033.vdocuments.us/reader033/viewer/2022061614/5681556d550346895dc3392a/html5/thumbnails/59.jpg)
……..Cutting plane passes along the center plane of the
feature.
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Ribs in sections
Chapter 7 section views
Vertical section
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Ribs in sections
Chapter 7 section views
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Chapter 7 section views
To shorten a view of an elongated object, conventional breaks are recommended
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Chapter 7 section views
Space is limited & object is symmetry == partial views
1/21/2 1/4
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http://dean.hbut.edu.cn/html/bkjx/yzkc/hg/index.htm
Home work
•Page 64 missing lines
•page 65 (1) front view->full section , left view-> half section
•page 67 front view& top view-> broken views
•Page 69 II-4-9 align section
•Page 70 (1) front view-> offset section
•Page 72 II-4-13 revolved section
•page 73 II-4-15 (1,2) removed section
•page 74 (1,2)draw correct full sections (about ribs)