Computer Aided Engineering Drawing CAD CAD Engineering Dr

Computer Aided Engineering Drawing ﺍﻟﺮﺳﻢ ﺍﻟﻬﻨﺪﺳﻲ ﺍﻟﻤﻌﺎﻥ ﺑﺎﻟﺤﺎﺳﻮﺏ CAD / CAD Engineering Dr. Tahseen Fadhil Abbas 2012 -2013 1 Computer Aided Engineering Drawing 2 / 12 / 2012 CAE Lab.

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

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 A 0. The size of an A 1 paper is half the size of A 0 while A 2 is half the size of A 1 and so forth. . For technical drawings A 4 is considered to be the smallest paper size. Smaller-sized AFormat papers (i. e. A 5, A 6, etc) are very rarely used for technical drawings. 3 Computer Aided Engineering Drawing 2 / 12 / 2012 CAE Lab.

The A-Format Paper Sizes When a format smaller than A 4 is needed, it is obtained by simply halving A$ along its longer side. For instance A 5 has 210 -mm as its longer side and (297/2 = 148 - mm) as its shorter side. . Format A 4 is exclusively used in an upright position. The other formats (which are lager in size than A 4) may be used in an upright position or horizontal position. . 4 Computer Aided Engineering Drawing Format Sheet mm A 0 841 X 1189 A 1 594 X 841 A 2 420 X 594 A 3 297 X 420 A 4 210 X 297 ……. …… 2 / 12 / 2012 CAE Lab.

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

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

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

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

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

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

Starting Auto. CAD 2002 a) from the Windows ‘Start screen’ with a double left-click on the Auto. CAD 2002 icon b ) b y s e l e c t i n g t h e w i n d o w s t a s k b a r s e q u e n c e : : S t a r t - P r o g r a m s - A u t o C A D 2 0 0 2 Both methods briefly display the Auto. CAD 2002 logo and then the Auto. CAD 2002 Today screen/dialogue box as Fig, . 13 Computer Aided Engineering Drawing 2 / 12 / 2012 CAE Lab.

The Graphics Screen The Auto. CAD 2002 graphics screen displays the following: 1 The title bar 2 The ‘windows buttons’ 3 The menu bar 4 The Standard toolbar 5 The Object Properties toolbar 6 The Windows taskbar 7 The Status bar 8 The Command prompt window area 14 9 The coordinate system icon 10 The drawing area 11 The on-screen cursor 12 The grips 13 Scroll bars 14 The Layout tabs 15 The Modify toolbar 16 The Draw toolbar Computer Aided Engineering Drawing 2 / 12 / 2012 CAE Lab.

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Drawing Line Absolute, Incremental and Polar ﺭﺳﻢ ﺍﻟﺨﻄﻮﻁ ﺑﺎﺳﺘﺨﺪﺍﻡ ﺍﻟﻤﺪﺧﻼﺕ ﺍﻟﻤﻄﻠﻘﺔ ﻭﺍﻟﺘﺰﺍﻳﺪﻳﺔ ﻭﺍﻟﻘﻄﺒﻴﺔ 16 Computer Aided Engineering Drawing 2 / 12 / 2012 CAE Lab.

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

PAPER SIZE A 4 ( 210 X 297 ) 18 Computer Aided Engineering Drawing 2 / 12 / 2012 CAE Lab.

Title Block 19 Computer Aided Engineering Drawing 2 / 12 / 2012 CAE Lab.

Saving Drawings In Class Ex 1 20 Computer Aided Engineering Drawing 2 / 12 / 2012 CAE Lab.

Home Work Multi solid lines and hidden lines with the title block 21 Computer Aided Engineering Drawing 2 / 12 / 2012 CAE Lab.

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