IntroductionPPT for Graphics.pdf new pdf file
- 2. Mark Distribution • No. of sheets to be completed: 6 • Each sheet carries: 15 marks Total sheet marks : 15x6=90 (Average will be taken) 90/6=15 Attendance : 10 marks VIVA : 15 marks Daily Performance: 30 marks (18 marks for sheets & 12 marks for AutoCAD) Lab test: 30 marks Total= 100 Marks
- 3. Impossible to describe the details of the building
- 4. Difficult to describe the details of the machine
- 5. Application of Engineering drawing in Civil Engineering
- 6. Introduction • Drawing is the way of expressing ideas and thoughts with the help of pictures. • It is essential for all branches of engineering. • Engineering Drawing is the Universal language of all engineer . • Basically it is the Graphic language from which a trained person can visualize and understand the object.
- 7. 1. Try to write a description of this object. 2. Test your written description by having someone attempt to make a sketch from your description. Effectiveness of Graphics Language The word languages are inadequate for describing the size, shape and features completely as well as concisely. You can easily understand that …
- 8. Elements of Engineering Drawing Engineering drawing are made up of graphics language and word language. Graphics language Describe a shape (mainly). Word language Describe size, location and specification of the object.
- 9. Graphic language in “engineering application” use lines to represent the surfaces, edges and contours of objects. A drawing can be done using freehand, instruments or computer methods. Composition of Graphic Language The language is known as “drawing” or “drafting” .
- 10. Freehand drawing The lines are sketched without using instruments other than pencils and erasers. Example
- 11. Instrument drawing Instruments are used to draw straight lines, circles, and curves concisely and accurately. Thus, the drawings are usually made to scale. Example
- 12. Computer drawing The drawings are usually made by commercial software such as AutoCAD, solid works etc. Example
- 13. Drawing Sheet Trimmed paper of a size A0 ~ A4. Standard sheet size (ISO) A4 210 x 297 A3 297 x 420 A2 420 x 594 A1 594 x 841 A0 841 x 1189 A4 A3 A2 A1 A0 (Dimensions in millimeters)
- 14. Type of Lines
- 15. Arrow Head
- 16. The exact shape of an object is communicated through orthographic drawings, which are developed by following some standard drawing practices. The process of adding size information to a drawing is known as dimensioning the drawing. A dimension is for size and position (of the designed/modeled shape). A DIMENSION is a numerical value expressed in appropriate units of measurement and used to define the size, location, orientation, form or other geometric characteristics of a part. Dimensioning
- 25. Title Block The title block of a drawing, usually located on the bottom or lower right hand corner, contains all the information necessary to identify the drawing and to verify its validity. A title block is divided into several areas. The drawing title and the drawing number are used for identification and filing purposes. Title Block for Silicon Students
- 26. ISO International Standards Organization Standard Code ANSI American National Standard Institute USA JIS Japanese Industrial Standard Japan BS British Standard UK AS Australian Standard Australia Bureau of Indian Standards BIS India Country Code Full name TS Turkish Standard Turkey
- 27. Drawing Scales Designation of a scale consists of the word “SCALE” followed by the indication of its ratio, as follow SCALE 1:1 for full size SCALE X:1 for enlargement scales (X > 1) SCALE 1:X for reduction scales (X > 1) Dimension numbers shown in the drawing are correspond to “true size” of the object and they are independent of the scale used in creating that drawing.
- 29. Types of Projection • Orthographic projection • Isometric projection
- 30. Projection • The act of obtaining the image of an object is termed “projection”. • All projection theory are based on two variables: -Line of sight -Plane of projection.
- 32. Orthographic Projections When the projectors are parallel to each other and also perpendicular to the plane, the projection is called Orthographic projection.
- 33. Quadrants
- 36. How do I know which method is being used? Difference between First and Third angle of Projection
- 38. FOR T.V. FIRST ANGLE PROJECTION IN THIS METHOD, THE OBJECT IS ASSUMED TO BE SITUATED IN FIRST QUADRANT MEANS ABOVE HP & INFRONT OF VP. OBJECT IS INBETWEEN OBSERVER & PLANE. ACTUAL PATTERN OF PLANES & VIEWS IN FIRST ANGLE METHOD OF PROJECTIONS X Y VP HP PP FV LSV TV •