Oblique form 4

CHARACTERISTIC

TYPES

EXCERCISES

CONSTRUCTION

CONCEPT OBLIQUE DRAWING

ORIENTATION

CONCEPT

Oblique Axis

CONCEPT

Oblique Axis

Horizontal Axis

CONCEPT

Oblique Axis

Vertical Axis

Horizontal Axis

CONCEPT

Oblique Axis

Horizontal Axis

Vertical Axis

Receding Axis(any convenient angle 30°, 45° & 60°)

Receding Axis

300

600

450

Charateristics of Oblique

Oblique LineOblique Line

Non Oblique

Line

Non Oblique

Line

Angle in Oblique

Angle in Oblique

Circle in Oblique

Circle in Oblique

Arc in ObliqueArc in

Oblique

A

CB

E

D

G

F

H

I

+

45o

The oblique lines are lines that are parallel to any oblique axis.

+

45o

B

A

C

D

E

H

I G

F

Any object lines that is not parallel to any oblique axis.

A

CB

E

D

G

F

H

I

+

60o

60o

An angle on an object surface that is parallel to the front projection plane or receding plane

+

45o

B

A

C

DE

H

I G

F

A circle that is parallel to the front projection plane is a circle of actual size while on a receding plane would appear is an ellipse.

A

B C

D

E

H

I

An arc which is parallel to the projection plane shows its true size.

TYPES OF OBLIQUE DRAWING

CAVALIER OBLIQUE

( D )

CABINET OBLIQUE ( 1/2

D )

COMMON OBLIQUE

( 3/4 D )

10050 75

ORIENTATION OF OBLIQUE DRAWING

1. Circle Orientation 2. Arc Orientation

3. Curve Orientation

Circle Orientation

Arc Orientation

Curve Orientation

CONSTRUCTION OF OBLIQUE DRAWING BY BOX METHOD

450

Top View

Front View

Example 1

45˚

STEP 1Make a box with 45⁰

Draw a line construction according the measurement

45˚

Find centre point and draw using compass to

create circle

FinallyDarken the object line

Example 2

45˚

STEP 1Make a box with 45⁰

Draw a line construction according the measurementFind centre point and

draw using compass to create circle

45˚

FinallyDarken the object line

Construct box at the back

Example 3

Step 1Construct a box

with 45 ⁰45˚

Draw a line construction according the measurement

Bisect each line and mark the point A, B, C

and D

A

B

C

D

Construct perpendicular lines on each points A, B, C and D which will create four centre

with blue point

45˚

Construct curve framemove the quartercircle

bisecting line

Finally Darken object line

Construct oblique circle by connecting the arc points

using the French or fl exible curve.

Redraw this object in cavalier in cabinet oblique drawings.

EXERCISEEXERCISE

Figure shows that the top and font views of objects. Draw this objects in cavalier oblique drawing. Use 10 mm x 10 mm grid.

EXERCISE