ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm....

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LECTURE 3 ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC PROJECTIONS

Transcript of ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm....

Page 1: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

L E C T U R E 3

ENGN103 ENGINEERING DRAWING

ORTHOGRAPHIC PROJECTIONS

Page 2: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

WHAT IS ORTHOGRAPHIC PROJECTION?

• Orthographic Projection is a method of

representing a three dimensional object on paper

using several two dimensional views.

• It is the international language of Engineers and

Designers

Page 3: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric
Page 4: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

Front elevation Side elevation

Plan – Top view

Page 5: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

ORTHOGRAPHIC PROJECTION- SIMPLE SHAPES

1. Rectangle of sides 50 x 35 mm resting on HP.

2. Rectangle of side 50 x 35 mm, with short edge on HP. 10mm

away from PP and 5mm away from VP.

3. Rectangle of side 50 x 35 mm, with short edge on HP. 10mm

away from PP and 5mm away from VP. Inclined at 30degree to

VP.

4. Rectangle of sides 50 x 35 mm, with one corner on HP. Making

30degree and 60degree with HP.

corner

Short edge

Long edge

Page 6: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric
Page 7: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

ORTHOGRAPHIC PROJECTION- SIMPLE SHAPES

• Draw the orthographic projections:

1. Circle of radius 25mm resting on HP, 10mm away

from VP and PP.

2. Triangle of sides 40mm, 15mm and 35mm. 7.5mm

away from PP, 10mm away from VP and 7.5mm

above HP.

3. Hexagon of side 25mm. 10mm away from VP.

4. Rectangle of sides 35mmx60mm lying flat on HP. A

square of side 25mm is resting on the rectangle

with its corner on the center of the rectangle.

Page 8: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric
Page 9: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

DRAW ORTHOGRAPHIC PROJECTIONS:

• Cube of side 45mm with a whole of 10mmx10mm in

the center of one of the sides.

• Triangular Pyramid of sides 30mm and height 55mm.

• A cone of base radius 20mm and height 40mm.

Resting on the corner

• A cylinder of base radius 15mm and length 55mm.

Resting on the side.

Page 10: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

ORTHOGRAPHIC PROJECTION OF OBJECTS

Front elevation Side elevation

Plan – Top view Isometric view

Page 11: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

Width Depth

Height

Width

He

igh

t

Depth

Depth

Wid

th

He

igh

t

FRONT ELEVATION SIDE ELEVATION

PLAN

Page 12: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

FRONT ELEVATION SIDE ELEVATION

Page 13: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

FRONT ELEVATION SIDE ELEVATION

PLAN

Page 14: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric
Page 15: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

FRONT ELEVATION SIDE ELEVATION

PLAN

Page 16: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

FRONT ELEVATION SIDE ELEVATION

PLAN

Page 17: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

FRONT ELEVATION SIDE ELEVATION

PLAN

Page 18: ENGN103 ENGINEERING DRAWING ORTHOGRAPHIC … · Triangle of sides 40mm, ... Hexagon of side 25mm. 10mm away from VP. 4. ... Front elevation Side elevation Plan – Top view Isometric

CENTERLINES

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PRECEDENCE OF LINES

FRONT ELEVATION SIDE ELEVATION

PLAN

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PLAN

SIDE ELEVATION FRONT ELEVATION