isometric drawing 1.0

8/12/2019 Isometric Drawing 1.0

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UNIT 8


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OBJECTIVE

CONCEPTS

ISOMETRICAXIS

GAMES

EXERCISE

APPLICATION

CHARACTERISTICS

VIEWING DIRECTION

CONSTRUCTION

CHARACTERISTICS


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OBJECTIVE

Describe the concept of isometric drawing

Identify characteristics of isometrics drawing

Construct isometric drawing using the box and frame methods

Construct isometric drawing for objects with flat, inclined, oblique

and curved surfaces.

Dimension isometric drawings

Apply isometric drawing in engineering fields

AT THE END OF THIS UNIT, YOU WILL ABLE TO


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Top view

Side view

Front view

CONCEPT OF ISOMETRIC DRAWING


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ISOMETRIC AXIS

HORIZONTAL AXIS

REVERSED AXISAXIS NORMAL


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CHARACTERISTICS

ISOMETRIC LINES

NON-ISOMETRIC LINES


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CHARACTERISTICS

ANGLE IN ISOMETRIC


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CHARACTERISTICS

CIRCLE IN ISOMETRIC


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CHARACTERISTICS

CURVE IN ISOMETRIC


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VIEWING DIRECTION


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FOUR-CENTRE METHOD

D

Draw an isometric circle

given diameter D


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FOUR-CENTRE METHOD

Draw an isometric quadrilateralABCD using side A

Draw the perpendicular lines on

the bisector lines of the

isometric quadrilateral ABCD

Centre at the intersection of the

perpendicular lines, construct an

arc with radius k

BR

R

KK

A

C

DB

Centred at A and C, construct a

arc with radius R


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BOX METHOD

AY

X

B

Z

Draw an isometric

drawing based on the

given orthographic

view and viewing

direction


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BOX METHOD

Draw an isometric box with thedimension W, H and D.

Use the x, y and z

measurements on isometric box.

Darken the object lines

Z

YX

Draw the object shape


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FRAME METHOD

Isometric drawing

of a pyramid shown

in the direction of

the arrow

h

zx

w

y


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FRAME METHOD

A

BC

DT

EDraw a quadrilateral ABCD fromthe top view

Draw the base of the pyramid on

the isometric quadrilateral ABCD

Darken the pyramids sides

Draw the high of the pyramid

through the point M using the

high h.


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COORDINATE METHOD

e

a

c

b

d

R

Draw an isometric

curve with radius R

based on the given

viewing direction


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COORDINATE METHOD

W

X

Y

Z

Mark the coordinate

points on the curve

with respect to the

vertical and

horizontal planes


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COORDINATE METHOD

Draw an isometric box based onthe given size. Marks c and d

Move the coordinates on the

isometric plane. Plot the points

on the curve using a flexible

curve


W

X

Y

Z


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FLAT SURFACES

Construct an

isometric drawing

of a solid with flatsurfaces according

to be given viewing

direction

W

D

w

H

z

xy

v


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FLAT SURFACES

z

v

y

xDraw a box of size W, D and H

Construct the object within the

isometric box


Draw a box a size v, w, y and z


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INCLINED SURFACES

Draw a box of size W, D and H

Construct the object within the

isometric box


Draw a box a size v, w, y and z

q p

h

xw

yz


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ROUNDED SURFACES

Construct an

isometric drawing

of a solid with

circular surface. A

is the lowest point

in the isometricdrawing.


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ROUNDED SURFACES

Draw an isometric box of a sizeW and n

Draw a quadrilateral to contain

isometric circles with diameters

R and height of h


Draw the isometric circles and

tangent line between the larger

and smaller circle


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OBLIQUE SURFACE

D

H

W

z

x

v y

A

Draw an

isometric solid

with obliquesurface.

A is the lowest

point.

A


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OBLIQUE SURFACE

D

H

W

y

x

z

v

w

A

Draw an isometric box of size W, Dand H

Mark the draw measurements of v,

w, x, y

and z


Draw the oblique surface


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CURVE SURFACE

R

A A

1

23

45

1

23

45

1

2

3

4

5

1

2

3

45

Draw an isometric drawing of

a solid with a curved surface.

A is the lowest point in theisometric drawing.

STEP 1

Divide the curve from right

sight view and then project it

to the front.

STEP 2

Move the points on the curve

on right side view and project

to front view.

STEP 3

Draw the curve connecting thepoints by using a flexible or

French curve.

STEP 4

Darken the object line.


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CURVE SURFACE

STEP 1

Divide the curve from topview and then project it to

the front view.

STEP 2

Move the points on the

curve on top view andproject to front view.

STEP 3

Draw the curve connecting

the points by using a

flexible of French curve.

STEP 4

Darken the object line.


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EXERCISES

Construct isometric drawings based on the given directional pointer shown.

1. 2.

80

50

40

20 50 50

41

16

9

f35

EXERCISE


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EXERCISE1. Construct isometric drawings based on

the given front and top directional views

shown below

D

v

w

W

x

H

yz

v

2. Construct isometric drawings based on the

given front and top directional views shown

below

D

W

H

z

yx

v

w


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isometric drawing 1.0

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