1. Computer Aided Engineering Drawing الرسم الهندسي المعان بالحاسوب
CAD / CAD Engineering
Dr. Tahseen Fadhil Abbas
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

2. Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

3. Computer Aided Engineering Drawing
Standards
Paper Sizes
The ISO most recommended paper sizes for technical drawings are known as A-FORMATS. Other series, like the B-Series, are of lesser importance. In the A-Format series, the largest size is A0. The size of an A1 paper is half the size of A0 while A2 is half the size of A1 and so forth.. For technical drawings A4 is considered to be the smallest paper size. Smaller-sized AFormat papers (i.e. A5, A6, etc) are very rarely used for technical drawings.
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

4. The A-Format Paper Sizes
When a format smaller than A4 is needed, it is obtained by simply halving A$ along its longer side. For instance A5 has 210-mm as its longer side and (297/2 = 148- mm) as its shorter side
Sheet mm
Format
841 X 1189 A0
594 X 841 A1
420 X 594 A2
297 X 420 A3
210 X 297 A4 ……
…….
Format A4 is exclusively used in an upright position. The other formats (which are lager in size than A4) may be used in an upright position or horizontal position
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

5. Computer Aided Engineering Drawing
Title Block
In every engineering drawing, a Title Block is included at the bottom (right-hand corner). The Title Blocks are locally standardized but should be designed in such a way that it can be easily understood. The information needed in any standard Title Block is normally:
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

6. Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

7. Basic Instruments and Equipment
T-Square
This is one of the oldest drawing instruments that still finds wide spread use both in the industry and in schools.
The size of a T-Square is determined by its blade length. Blade lengths of 60-mm, 90-mm, 120- mm and 150-mm are common.
USES: The T-Square is used primarily as a guide for drawing horizontal parallel lines.
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

8. Computer Aided Engineering Drawing
Set Square
Set Squares (SSs) are transparent, triangular-shaped drawing instruments that are used with a T-Square for drawing vertical or inclined lines.
SSs contain angles most commonly used in technical drawing, i.e. 30, 45, 60 and 90.
The height/length of SSs is typically 15-cm, 20-cm, and 25-cm.
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

9. Computer Aided Engineering Drawing
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10. Computer Aided Engineering Drawing
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11. Computer Aided Engineering Drawing
Line Types
In Engineering Drawing, we make use of different lines and line styles to convey the desired message. These lines differ in (i) thickness and (ii) style. Typical uses of these lines are summarized below.
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

12. Computer Aided Engineering Drawing
Beginning AutoCAD 2002
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

13. Computer Aided Engineering Drawing
Starting AutoCAD 2002
a) from the Windows ‘Start screen’ with a double left-click on the AutoCAD 2002 icon
b) by selecting the windows taskbar sequence::
Start-Programs-AutoCAD 2002-AutoCAD 2002
Both methods briefly display the AutoCAD 2002 logo and then the AutoCAD 2002 Today
screen/dialogue box as Fig,
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

14. The AutoCAD 2002 graphics screen displays the following:
The Graphics Screen
The AutoCAD 2002 graphics screen displays the following:
1 The title bar The coordinate system icon
2 The ‘windows buttons’ The drawing area
3 The menu bar The on-screen cursor
4 The Standard toolbar The grips
5 The Object Properties toolbar 13 Scroll bars
6 The Windows taskbar The Layout tabs
7 The Status bar The Modify toolbar
8 The Command prompt window area 16 The Draw toolbar
Computer Aided Engineering Drawing
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15. Computer Aided Engineering Drawing
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16. Computer Aided Engineering Drawing
Drawing Line Absolute, Incremental and Polar رسم الخطوط باستخدام المدخلات المطلقة والتزايدية والقطبية
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

17. Computer Aided Engineering Drawing
COPY استخدام امر النسخ
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

18. Computer Aided Engineering Drawing
PAPER SIZE A4 ( 210 X 297 )
Computer Aided Engineering Drawing
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19. Computer Aided Engineering Drawing
Title Block
Computer Aided Engineering Drawing
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20. Computer Aided Engineering Drawing
Saving Drawings
In Class Ex1
Computer Aided Engineering Drawing
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21. Home Work Multi solid lines and hidden lines with the title block
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.

22. Computer Aided Engineering Drawing
THANK YOU
Computer Aided Engineering Drawing
2 / 12 / 2012 CAE Lab.