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Design Project

Design Project. 8.30 – 9.30 Project work (meeting). Assign a rapporteur. Search in internet, patents and standards about. . bike types, size and design parameters. . child’s height and weight ranges maximum capacity ??. . . the regulations about carrying people. .

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Design Project

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  1. Design Project 8.30 – 9.30 Project work (meeting) • Assign a rapporteur Search in internet, patents and standards about  bike types, size and design parameters  child’s height and weight ranges maximum capacity ??   the regulations about carrying people  safety requirements Prepare the meeting minutes MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  2. Design Project - Minutes Design group name Meeting minutes Date : Time : Meeting room : Participants : Subject & decisions 1. 2. 3. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  3. 3. Principles of Dimensioning This weekyou will learn dimensioning . The steps to follow are: • Functional & Non-functional Dimensions • Principles of Dimensioning • Dimension Placement & Conventions • Dimension Tolerances • Geometric Dimensioning & Tolerancing • Assignment #2 MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  4. 3. Principles of Dimensioning What is dimension ? Dimensions are defined as numerical values expressed in appropriate units of measure and indicated on a drawing and in other documents. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  5. 3. Principles of Dimensioning FUNCTIONAL DIMENSIONS Functional dimensions directly affect the function or working of a product and may be of the size or location types. A datum is a reference line on the drawing from which a component is dimensioned. In practice, a datum is any functional surface or axis used for manufacture, inspection, location, or assembly purposes. NON-FUNCTIONAL DIMENSIONS Non-functional dimensions, NF in Figure, are those dimensions which are used for production purposes but which do not directly affect the function or working of a product. Non-functional dimensions usually are not inspected. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  6. 3. Principles of Dimensioning MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  7. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  8. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  9. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  10. 3. Principles of Dimensioning PRINCIPLES OF DIMENSIONING • Dimensions are normally expressed in millimeters. • Dimensions of less than unity should be preceded by zero • Each dimension should appear only once • It should not be repeated on other views. • Dimensions relative to a particular feature should be placed in one view, which shows the relevant features most clearly, rather than spread over several views. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  11. 3. Principles of Dimensioning AUTOMATIC DIMENSIONING Some more powerful CADD systems allow dimensions to be added automatically to a drawing. In a drawing made by hand, there is no necessary or inherent correspondence between the dimensions of the drawn outline and the intended dimensions of the object, which it represents, until a scale has been specified. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  12. 3. Principles of Dimensioning Dimensioning Concept CADD software such as AutoCAD provides three basic types of dimensioning: linear (horizontal, vertical, aligned, rotated, ordinate, baseline and continued), radial and angular. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  13. 3. Principles of Dimensioning Dimensioning System Variables The dimensioning system variables control the appearance of dimensions. You may set these variables on the command line VariableValueExplanation . Dimasz<2.5>Controls the size of the dimension arrowhead Dimgap <1.5>Sets the distance around the dimension text above its line Dimexe<2.0>Determines how far to extend the extension line Dimexo<0>Determines how far extension lines offset from origin point Dimdli<10>Sets the distance between adjacent dimension lines Dimrnd<0>Rounding dimension text value MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  14. 3. Principles of Dimensioning Arrowheads MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  15. 3. Principles of Dimensioning Special Characters Diameter%%CØ%%C 50Ø 50 Degree%%D°50%%D50 ° Plus/minus%%P±50 %%P 250 ± 2 MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  16. 3. Principles of Dimensioning Text Justification Centered Above Aligned & Centered Above Outside MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  17. 3. Principles of Dimensioning Text Fitting Rounding off Dimensions MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  18. 3. Principles of Dimensioning DIMENSION TOLERANCES Tolerance is the total amount that a specific dimension is permitted to vary; it is the difference between the maximum and minimum limits for the dimension. Tolerances can be applied directly to dimensioned features, using limit dimensioning. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  19. Dimensioning in AutoCAD Before setting dimension style, format Text Style MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  20. Dimensioning in AutoCAD MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  21. Dimensioning in AutoCAD To set the dimension varialbes open Dimension Style … MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  22. Dimensioning in AutoCAD MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  23. Dimensioning in AutoCAD MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2004

  24. Dimensioning in AutoCAD

  25. Dimensioning in AutoCAD MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2004

  26. Dimensioning in AutoCAD

  27. Dimensioning in AutoCAD

  28. Dimensioning in AutoCAD

  29. Dimensioning in AutoCAD

  30. Dimensioning in AutoCAD MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  31. Move the mouse on the icon bar Move right click MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  32. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  33. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  34. Dimensioning in AutoCAD Leader Dimension style dialog box Aligned Radial Angular Continous Geometric tolerance Dim text Position edit Parallel Baseline Diameter Linear Horizonral / vertical MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  35. 3. Principles of Dimensioning Geometric Dimensioning & Tolerancing MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  36. 3. Principles of Dimensioning  Geometric Dimensioning & Tolerancing  MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  37. 3. Principles of Dimensioning Basic Dimensions Basic dimensions are the theoretical sizes from which limits of size are derived by the application of allowances and tolerances. MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  38. 4. Principles of Dimensioning Linear Dimensions MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  39. 3. Principles of Dimensioning Chain Dimensions MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  40. 3. Principles of Dimensioning Chain Dimensions MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  41. 3. Principles of Dimensioning MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  42. 3. Principles of Dimensioning MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  43. 3. Principles of Dimensioning Radial Dimensioning MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  44. 3. Principles of Dimensioning MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  45. 3. Principles of Dimensioning MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  46. 3. Principles of Dimensioning Radial Dimensioning MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  47. 3. Principles of Dimensioning Angular Dimensioning MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  48. 3. Principles of Dimensioning MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

  49. 3. Principles of Dimensioning MAK112E Computer Aided Technical Drawing Dr C Erdem IMRAK @ 2011

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