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1 2 (Multiview Projection ) 2 1. Orthographic Projection 2. Six View Sketching and three View Sketching 3. Basic Lines and Planes 4. Projection Method 5. Sketching Techniques ? ? Multiview Projection (ก ) (Front View) (R. Side View) (Top View) Multiview Projection Orthographic Sketching

(MultiviewProjection) 3. Basic Lines and Planes 4 ...eng.sut.ac.th/me/meold/2_2552/425101/Engraph1_Week2(1_52).pdf · Orthographic Projection 2. Six View Sketching and three View

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Page 1: (MultiviewProjection) 3. Basic Lines and Planes 4 ...eng.sut.ac.th/me/meold/2_2552/425101/Engraph1_Week2(1_52).pdf · Orthographic Projection 2. Six View Sketching and three View

1

�������� 2�� �������������

(Multiview Projection )

&'()���*'��������&'()���*'�������� 22

1. Orthographic Projection

2. Six View Sketching and three View Sketching

3. Basic Lines and Planes

4. Projection Method

5. Sketching Techniques

�+�,�-.��&/�'�� ���-�)���ก ?

23�����4-4,�5����26�789���/'���63ก-.��/��:�-6�*';���5:',�.

������������� ����ก �� �� � ���� � �������� ������ก� �������� �� �!�����������"#�

�+�,�-.��&/�'�� ���-�)���ก ?

����ก�������ก$ �������� % MultiviewProjection (ก �' �� ����"(��� � ) � �) +

���� � �, � � ��� (Front View) � �� ��� (R. Side View) � ��� (Top View)

Multiview Projection Orthographic Sketching

���ก �����<=������ �

Page 2: (MultiviewProjection) 3. Basic Lines and Planes 4 ...eng.sut.ac.th/me/meold/2_2552/425101/Engraph1_Week2(1_52).pdf · Orthographic Projection 2. Six View Sketching and three View

2

3. ��������-2E�'��)� 6 �.�'(The six standard views )

The six standard views 47�2K�23�

������� 3 L35�789���2���8&���/��:�-6�M)+�ก�'

1 �.�'�'.�ก�;�.�'���� (Front ก�; Rear)

2 �.�'/:�9�8�.�'M.�� (R Side ก�; L Side)

3 �.�';'9�8�.�'�5�� (Top ก�; Bottom)

Page 3: (MultiviewProjection) 3. Basic Lines and Planes 4 ...eng.sut.ac.th/me/meold/2_2552/425101/Engraph1_Week2(1_52).pdf · Orthographic Projection 2. Six View Sketching and three View

3

MULTIVIEW PROJECTION

Three principle dimensionsof an object …

Width Depth

Height

Width

Hei

ght

Depth

Dep

th

… can be presented onlytwo in each view.

Adjacent view(s)is needed tofulfill the sizedescription.

MULTIVIEW PROJECTION

Front view Right side view

Top view

MULTIVIEW PROJECTION MULTIVIEW PROJECTION

HeightWidth

Dep

th

History OBJECT FEATURESEdges are lines that represent the boundary

between two faces.

Corners Represent the intersection of two or

more edges.Edge

Corner

Edge No edge

No corner No corner

Page 4: (MultiviewProjection) 3. Basic Lines and Planes 4 ...eng.sut.ac.th/me/meold/2_2552/425101/Engraph1_Week2(1_52).pdf · Orthographic Projection 2. Six View Sketching and three View

4

Surfaces are areas that are bounded by edges

or limiting element.

Limitingelement

is a line that represents the last visible

part of the curve surface.

Surface Surface Surface

LimitLimit

OBJECT FEATURES

A

B

PROJECTION OF POINT(S)

AF

BR

AT

BF AR

BT

AF AR

AT

BFBR

BT

Equaldistance

&�.' ����269;5�,�.&�S' 3 ��กTK8���')1. Normal Line (���<กD) �<=�������� ����� �ก����� �� ��D� 2 ��� �

2. Inclined Line (��������) �<=�������� ����� �ก����� �� ��D� 1 ��� �

3. Oblique Line (����������) �<=�������#� � ����� �ก����� �� �(����

(������������ �� ������� FRONT TOP RIGHT)

1. Basic Lines and Planes 1. Basic Lines and Planes

1. Normal Line (���<กD) �<=�������� ����� �ก����� �� ��D� 2 ��� �

A

B

AF BF BRAR

AT

BT

BR

AR

AF BF

AT

BT

True length

NORMAL LINETrue lengthPoint

Equallength

PROJECTION OF LINE

2. Inclined Line (��������) �<=�������� ����� �ก����� �� ��D� 1 ��� �

1. Basic Lines and Planes

Page 5: (MultiviewProjection) 3. Basic Lines and Planes 4 ...eng.sut.ac.th/me/meold/2_2552/425101/Engraph1_Week2(1_52).pdf · Orthographic Projection 2. Six View Sketching and three View

5

AB

AF BF BRAR

AT

BT

INCLINED LINEForeshortened

BR

AR

AF

BF

Foreshortened

AT

BT

True length

A

Equallength

PROJECTION OF LINE

3. Oblique Line (����������) �<=�������#� � ����� �ก����� �� �(����

1. Basic Lines and Planes

A

AF

BF BR

AR

AT

BT

OBLIQUED LINE

Equallength

B

ForeshortenedForeshortened

Foreshortened

BR

AR

AF

BF

AT

BT

PROJECTION OF LINE

1. Normal Surface (��� �<กD) �<=���� ����� ������' กก����� �� ��D� 2 ��� �

2. Inclined Surface (��� ������) �<=���� ����� ������' กก����� �� ��D� 1 ��� �

3. Oblique Surface (��� ��������) �<=���� ����� ���#� ���' ก���#� �� �ก����� �� �(����

(������������ �� ������� FRONT TOP RIGHT)

28'�; ����269;5�,�.&�S' 3 ��กTK8���')

1. Basic Lines and Planes

1. Normal Surface (��� �<กD) �<=���� ����� ������' กก����� �� ��D� 2 ��� �

1. Basic Lines and Planes

BC

A

PROJECTION OF PLANE

BF AF,CF CRAR,BR

AT

CT

NORMAL PLANE

Equallength

EdgeEdge

True size

CR

AR,BR

AF,CF

BF

AT

BT

CT

BT

Page 6: (MultiviewProjection) 3. Basic Lines and Planes 4 ...eng.sut.ac.th/me/meold/2_2552/425101/Engraph1_Week2(1_52).pdf · Orthographic Projection 2. Six View Sketching and three View

6

2. Inclined Surface (��� ������) �<=���� ����� ������' กก����� �� ��D� 1 ��� �

1. Basic Lines and Planes

BC

BF AF

CR

AR,BR

AT

CT

INCLINED PLANE

A

Equallength

BT

C

CF

Edge

CR

AR,BR

Foreshortened

BT

CT

AT

AF

CF

Foreshortened

BF

PROJECTION OF PLANE

3. Oblique Surface (��� ��������) �<=���� ����� ���#� ���' ก���#� �� �ก����� � � �(����

1. Basic Lines and Planes

3. Oblique Surface (��� ��������) �<=���� ����#� � ������' ก����� �ก����� � � �(����

1. Basic Lines and Planes

BF

AF

CR

AR

AT

CT

OBLIQUED PLANE

A

Equallength

BT

C

CF

B

BR

Foreshortened

CR

AR

BR

AF

BF CF

Foreshortened

AT

BT

CT

Foreshortened

PROJECTION OF PLANE 1. Basic Lines and Planes

Page 7: (MultiviewProjection) 3. Basic Lines and Planes 4 ...eng.sut.ac.th/me/meold/2_2552/425101/Engraph1_Week2(1_52).pdf · Orthographic Projection 2. Six View Sketching and three View

7

s

s

s

Sketching Techniques Sketching Techniques

Projection Method

Dividers Scales

Projection Method

Miter Line

Projection Method PRECEDENCE OF LINE

Visibleline

Order ofimportance

Hiddenline

Centerline

Page 8: (MultiviewProjection) 3. Basic Lines and Planes 4 ...eng.sut.ac.th/me/meold/2_2552/425101/Engraph1_Week2(1_52).pdf · Orthographic Projection 2. Six View Sketching and three View

8

HIDDEN LINE PRACTICE

Hidden line should join a visible line, except itextended from the visible line.

Correct

No !

Join

Leavespace

Correct No !

Hidden line should join a visible line, except itextended from the visible line.

Leavespace

Leavespace

HIDDEN LINE PRACTICE

Hidden line should intersect to form L and Tcorners.

Correct

No !

L T

HIDDEN LINE PRACTICE

Hidden arcs should start on a center line.

HIDDEN LINE PRACTICE

CENTER LINE PRACTICEIn circular view, short dash should cross at the intersections of center line.

For small hole, center line is presented as thin continuous line.

Center line should not extend between views.

Leave space Leave space

Leave the gap when centerline forms a

continuation with a visible or hidden line

Leavespace

Leavespace

Leavespace

Leavespace

Center line should always start and end with

long dash.

CENTER LINE PRACTICE