Introduction_to_CAD_tools_15809188935553063905e3ae86dcf350.pptx

Cad

1. DEPARTMENT OF CIVIL ENGINEERING INDIAN INSTITUTE OF TECHNOLOGY (INDIAN SCHOOL OF MINES) DHANBAD DHANBAD-826004 INTRODUCTION TO CAD TOOLS ENGINEERING GRAPHICS

2. About the Software 04/06/2018 2 The word AutoCAD is made of two words “ Auto ”(name of the company and CAD (computer aided design) AutoCAD is a CAD (Computer Aided Design or Computer Aided Drafting) software application It is widely used for 2D and 3D design and drafting . Developed by Autodesk company in 1982. It came to India in 1988.

3. Why CAD (Computer Aided Design) ??? Improved productivity in drafting Improved quality over hand drafting Reduced manpower requirements Modifications in Drawings are easier Improved Accuracy of Drawing Easy to transfer 3

4. 21/05/2018 4 How to Install the Software Go to the Autodesk Education Community. Choose AutoCAD. Create an Autodesk account. ... Then , click DOWNLOAD NOW. Select the desired version, your operating system, and your preferred language. The displayed serial number and product key are sent to your email address . And click BROWSER DOWNLOAD. Next, install the free version. When installing the CAD software, enter the serial number, and product key to unlock it. When you start the program the first time, activate the license.

5. AutoCAD Screen 5 MENU BAR TOOL BAR COMMAND LINE STATUS BAR UCS ICON VIEW CUBE CORDINATE SYSTEM INFO CENTER NAVIGATION BAR LAYOUT TABS CURSOR

6. 21/05/2018 6 Coordinate system in AutoCAD ( Contd ….) World Coordinate System (WCS) User defined Coordinate System (UCS)

7. Coordinate system in AutoCAD 21/05/2018 7 Cartesian System Polar System The  system you use will depend upon the information you have. The Polar  Coordinate System  uses the distance between points (length or magnitude) and the angle (direction or vector). The Cartesian (rectangular)  Coordinate System  uses the “x” distance (left/right) and the “y” distance (up/down).

8. 8 Giving commands in AutoCAD………. Command line Toolbars (view/Toolbars) Drop-down menus You can pick any one(s ) that you are comfortable with.

9. Type of commands in AutoCAD 9 Drawing commands Modifying commands Dimensioning commands 3D commands

10. Drawing Commands 21/05/2018 10

11. Basic Draw Commands CIRCLE:  Draws circles of any size. Command:  Circle (enter) 3P/2P/TTR/<center point>:  (pick a center point) Diameter or <Radius>:  (Pick a point on the circle ) LINE:  Draws straight lines between two points Command:  LINE (enter) From Point:  (pick a point using the mouse) To Point:  (Pick a point using the mouse) To Point:  (Press return to end the command ) 21/05/2018 11 ARC:  Draws an arc (any part of a circle or curve) through three known points. Command:  ARC (enter) Center/ < Start point > :  (pick the first point on the arc) Center/End/ < Second point > :   C Center:  (pick the arc’s center point) Angle/Length of chord/ <End point > :  (pick the arc endpoint) Drawing Commands

12. Display Commands LIMITS:  Sets the size of the drawing paper.  For size “A” drawing paper the limits should be set for                                               10.5 x Command:  LIMITS (enter) On/Off/Lower left corner <0.0000> (enter) Upper right corner: 10.5,8 (enter) ZOOM:  Enlarges or reduces the display of a drawing. Command:  ZOOM (enter) All/Center/Dynamic/Extents/Left/Previous/ Vmax /Window/<Scale(x/XP)>: (pick a point to define one corner of a rectangular viewing window then pick a point to define                 the second point to define the opposite diagonal corner of the viewing window) Note:  To return the picture to its original viewing size enter  ALL  and press the enter key when prompted instead of defining a window. 21/05/2018 12 PAN:           A llows you to move your view point around the drawing without changing the magnification                 factor. Command:  PAN (enter) Drawing Commands

13. The modify tools (from left to right): Erase, Copy, Mirror, Offset, Array, Move, Rotate, Scale, Stretch, Lengthen, Trim, Extend, Break at point, Break, Chamfer, Fillet, Explode 21/05/2018 13 Modifying Commands Erase - Select this button then a drawing element to erase it permanently from the drawing. Copy - The copy command will copy any selected drawing elements and reposition where specified by the user, without affecting the original elements. Mirror - The mirror command will create a mirror image of any selected drawing elements along any line of symmetry specified by the user.

14. Offset -Offset will make a copy of a line or series of selected lines by a specified distance in the direction specified . Array -The array command quickly creates copies of a selected object(s) to a specified spacing.. 21/05/2018 14 Modifying Commands Contd ….

15. Modifying Commands Contd. Polar Array- Move: The move command works exactly the same as the copy command described above, except instead of creating a copy of the selected objects, the second objects are moved. 21/05/2018 15

16. 21/05/2018 16 Rotate - The rotate command rotates any selected objects about a defined point by the angle specified. Scale: The scale command scales the size of a selected object(s) by a defined scale factor from a selected base point. Extend: The lengthen command will lengthen a selected line . Trim : The trim command is an extremely useful tool which will erase all parts of an object beyond or within its intersection with another object. Modifying Commands Contd …….

17. Modifying Commands Contd ……. Break: The break at point command enables the user to break an object at a specific point, creating two separate objects. 21/05/2018 17 Chamfer: The chamfer command will chamfer the intersection of two lines to a specified distance.

18. Modifying Commands Contd ……. Fillet: The fillet command is very similar to the chamfer command above, Autocad creates a radius between the two points. 21/05/2018 18 Explode: The explode command is very straight forward. It simply breaks down an object down to its basic line entities.

19. Dimensioning Practices Dimensional information includes Size dimensions. Location dimensions. Notes. EDT 310 - Chapter 18 - Basic Dimensioning Practices 19

20. Dimensioning Practices Size Dimensions Size dimensions provide the size of physical features. Diameter of holes Width Length Depth EDT 310 - Chapter 18 - Basic Dimensioning Practices 20

21. Dimensioning Practices Location Dimensions Location dimensions provide the location of physical features. Location of holes from end Datum Dimensioning Chain Dimensioning Location of windows/doors in buildings EDT 310 - Chapter 18 - Basic Dimensioning Practices 21

22. Dimensioning Practices Notes Notes give information about individual or specific features on the drawing. They are attached to the feature with a leader line. EDT 310 - Chapter 18 - Basic Dimensioning Practices 22

23. EDT 310 - Chapter 18 - Basic Dimensioning Practices 23 Dimensioning Formats

24. EDT 310 - Chapter 18 - Basic Dimensioning Practices 24 Dimensioning Formats

25. EDT 310 - Chapter 18 - Basic Dimensioning Practices 25 Dimensioning Formats

26. EDT 310 - Chapter 18 - Basic Dimensioning Practices 26 Dimensioning Formats

27. 21/05/2018 27 Dimensioning Commands DLI DIMLINEAR DAL DIMALIGNED DAN DIMANGULAR DBA DIMBASELINE DCE DIMCENTER DCO DIMCONTINUE DED DIMEDIT DRA DIMRADIUS DDI DIMDIAMETER DOR DIMORDINATE DOV DIMOVERRIDE DST DIMSTYLE LE LEADER

28. 21/05/2018 28 THANK YOU