By : Hettyk Ratnasari

CHOOSING THE RIGHT TECHNICAL DESIGN

THE PURPOSE OF THE STUDY

Students are able to:1. Choose the right technical design

HOW TO CHOOSE THE RIGHT TECHNICAL DESIGN

1. Choose the working pieces

2. Choose the type of the projection

3. Give the measurement

4. Choose or state the cutting style

CHOSING THE WORKING PIECES

1. The shape: cylinder, square, triangle, etc.

2. The type: axis or hollow

CHOOSE THE TYPE OF THE PROJECTION

projection: a. Pictorial projection b. Orthogonal projection

PICTORIAL PROJECTION

1. Dimetric projection2. Isometric projection3. Resemble projection4. Perspective

ORTHOGONAL PROJECTION

1. European projection2. American projection

EUROPEAN PROJECTION

1. straight vision2. side vision3. upward vision

AMERICAN PROJECTION

1. upward vision2. straight vision3. side vision

STATE/ CHOOSE THE VISION

STRAIGHT VISION

Design that has many information

THE TOTAL VISION

1. suitable with the needs2. without any doubts

DESIGN POSITION

As the same as the position when it built

PARTLY VISION

It is used if the vision doesn’t give complete information

SPOT VISION

Replacing the simetric vision to make sure the design

SHORTENED- VISION

Searching on the suitable paper size

Repeated-vision

One circle, others are the fuses

STATE THE MEASUREMENT

1. The arrow

2. lines

3. measurement number

4. the symbol of the shape

THE ARROW

1. blocking2. measurement limit3. 1:3 comparing

THE LINE

1. continuing soft line2. inline with the

object line3. limited by 2 arrows

MEASUREMENT NUMBER

1. the number is on the horizontal line

2. the number is in the left side of the vertical line, down side

3. the unit should be the same, if it is not, it should be shown

MEASUREMENT SYMBOLS

ǿ diameter

without ǿ

MEASUREMENT SYMBOLS

sisi bujur segiempat sama 15 mm

square sides are 15 mm

R jari-jari (radius)

RADIUS SYMBOL

Symbol R

MEASUREMENT SYMBOL

Sǿ or SR for a ball

HOW TO STATE THE MEASUREMENT

By using coordinate

HOW TO STATE MEASUREMENT

The measurement is in one line

HOW TO STATE MEASUREMENT

The measurement on the design structure

CHOOSE THE CUTTING TYPE

To avoid the doubtscut the piece.

THE CUTTING DESIGN PLACEMENT

American projectionthe surface is placed behind the

arrow symbol

THE CUTTING DESIGN PLACEMENT

European projection:The surface is in front of the arrow symbol

STATE THE CUTTING DESIGN

Turned-cutting surface

THE TYPE OF CUTTING DESIGN

A. fully cutting

THE TYPE OF CUTTING DESIGN

a Half cutting

THE TYPE OF CUTTING DESIGN

C. Partly cutting

THE TYPE OF CUTTING DESIGN

D. Running cutting

THE TYPE OF CUTTING DESIGN

E. Turning-cutting

THE RIGHT DESIGN SAMPLE

FORMATIVE TEST

1. Mention the procedure to choose the right technical design!

2. Mention 2 examples to state the object vision! 3. Mention 4 steps to state the measurement on the

object!4. What is the reason making the cutting design?

REFERENCES

1. Menggambar Teknik 1, depdikbud2. Menggambar Teknik 2, depdikbud3. Windarto, Buku Teknik Pemesinan, 2008,Depdiknas, 4. Wahyu Makhmud Sueb dkk, Menggambar Mesin

secara terperinci, Buku Gambar Teknik mesin ,20045. Modul Teknik Pemesinan, 20076. Nanang Ruhyat ,Modul 3, Menggambar Teknik, Pusat

Pengembangan Bahan Ajar-UMB 7. Nanang Ruhyat,Modul 7, Menggambar Teknik, Pusat

Pengembangan Bahan Ajar-UMB