me2103 engineering visualization & modelling...
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ME2103 Engineering Visualization & ModellingDEVELOPMENT
A/P Lee Kim SengRoom: EA 04-17Tel: 6874 [email protected]
DevelopmentThe development of surfaces, such as those found in sheet metal fabrication, is a flat pattern that represents the unfolded or unrolled surface of the form.
The resulting plane figure gives the true size of each area of the form so connected that when fabricated the desired part or structure is produced.
A/P Lee Kim Seng
Some Sheet Metal Parts that need Development
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Some Examples of Development
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Some Examples of Development
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Some Examples of Development
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Some Examples of Development
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Some Examples of Development
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Some Examples of Development
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Some Examples of Development
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Engineering Applications
Flues, chutes, stacks, piping …
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Example: Development of Rectangular Prism
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Example: Development of Cylinder
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Development of a Cylinder
a
a a
0 1 2 63 4 5 7 8 9 10 11 12
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Example: Development of Slant Cut Cylinder
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Development of Slant Cut Cylinder
a
a a
0, 12
10
234
5
6
7
8 9
11
1
0 1 2 3 4 5 6 7 8 9 10 11 12
A/P Lee Kim Seng
Development of Slant Cut Cylinder
a
a a
0, 12
10
234
5
6
7
8 9
11
1
0 1 2 3 4 5 6 7 8 9 10 11 12
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Example: Development of Cone
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1
234
5
6
5
4 32
1
1 2 34
5
6
1
0
R
R
A6
Development of ConeA
2
30
4
5
0
0
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1
234
5
6
5
4 32
1
1 2 34
5
6
1
0
R
R
A6345
12
345
6
0
0
0
1
1
2
2
3
3
4
4
5
56
Development of Truncated ConeA
2
3012
4
5
0
0
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1
234
5
6
5
4 32
1
1 2 34
5
6
1
0
R
R
A
A6 12345
a bcde
fg
g
g
f
f
e
e
d
d
c
c
b
ba
Development of Cone Intersecting with Cylinder
2
3
04
5
0
0
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0
1
234
5
6
5
4 32
1
R
A
6 12345
a bcde
fg
0 1 2 34
5
6
10
R
A
g
g
f
f
e
e
d
d
c
c
b
ba
0 1 2 3 4 5 6 7 8 9 10 11 12
Development of Cone Intersecting with
CylinderA/P Lee Kim Seng
02
3
4
5
Development of a Hexagon
1 2
3
45
y
x
1,5 32,4
0
0 6
y
10
2
3
4
5
6
x
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Development of Truncated Hexagon
1 2
3
45
y
x
1,5 32,4
1’,5’
2’,4’
3’
0’,6’
y
10
2
3
4
5
6
0’
6’
5’
1’ 2’
4’
3’
0 6
x
0
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Development of Oblique Pyramid
A
O
O
A/BC/D
D
TLTL
ab
ab
O
B
C
D
A
ABC
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TLTL
01, 52, 43
0
12
3
4 5
P P1, 5 2, 4
1’2’
A A
0
1
2
3
4
5
6
A
TL
Development of Oblique Hexagon
A/P Lee Kim Seng
A
TLTL
01, 52, 43
0
12
3
4 5
P P1, 5 2, 4
1’2’
A A
0
1
2
3
4
5
6
A
TL
1A, 5A
2A, 4A
0A
3A2A
1A
0A
1A2A 3A 4A
5A
6A
0A3A
2A
1A
5A
4A
A
Development of Oblique Truncated Hexagon
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A
2
0
1
34
5
6
6 5 4 3 2 1 0
A
A A
A
TL
6
A
5 5
44
3 3
2 2
1 1
0 0
1 2 3 4 5
x
x
Development of Oblique Cone
A/P Lee Kim Seng
2
0
1
34
5
6
6 5 4 3 2 1 0
A
A A
A
TL
0A1A2A
3A4A
5A6A
6
A
5 5
6A5A 5A
44
4A 4A
3 3
3A3A
2 2
2A 2A
1 1
1A 1A0 0
0A 0A
1 2 3 45
x
x
5A
4A3A
2A1A
Development of Oblique Truncated Cone
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Transition Pieces
A transition piece is one that connects two differently shaped, differently sized, or skewed-position openings.
In most cases, transition pieces are composed of plane surfaces and conical surfaces, the latter being developed by triangulation.
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Examples of Transition Pieces
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Engineering Applications of Transition Pieces
Air Conditioning, heating, ventilation …
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Examples of Transition Pieces
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Development of Rectangle to Rectangle Transition
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Examples of Transition Pieces
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Example: Rectangle to Round Transition
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Examples of Transition Pieces
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Development of Rectangle to Round Transition
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Development ofRectangle to Round Transformer
Develop the Rectangle to Round transformer shown below.Make the joint line at A-A.
A/P Lee Kim Seng3rd Angle Proj.
6 0
1
234
5
5
43
2
1ab
Development ofRectangle to Round
TransitionAoBo
A
AoBo
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6 0
1
234
5
5
43
2
1ab
A
AoBo
TL
a
a b
Ao Bo
0 6
b
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6 0
1
234
5
5
43
2
1ab
A
AoBo
TL
a
a b
Ao Bo
0 61 5
b
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6 0
1
234
5
5
43
2
1ab
A
AoBo
TL
a
a b
Ao Bo
0 61 52 4
b
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6 0
1
234
5
5
43
2
1ab
A
AoBo
TL
ab
a b
Ao Bo
0 61 52 4 33
A/P Lee Kim Seng
Development ofRectangle to Round
Transition
6 0
1
234
5
5
43
2
1ab
A
AoBo
TL
ab
a b
Ao Bo
0 61 52 4 33
A/P Lee Kim Seng
Development ofRectangle to Round Transition
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SP0
1
2
3
BoBo
4
565
4
3
2
1
0
Ao
6 01
2345
54 3 2
1A
AoBo
ab
Ao Bo
0 61 52 4 33
AA
Ao
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Example: Square to Round Transition
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Development of Square to Round Transition (Triangulation Method)
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Thank You
A/P Lee Kim Seng