Downloaded 173 times
Uploaded byHassan Habib
Geometrical tolerances
This document provides an introduction to geometrical tolerancing, including terminology, dimensioning rules and methods, and tolerancing of various features. It discusses the ASME Y14.5 standard, introduces common terms like dimensions, datums, and feature control frames. It describes different types of dimensioning systems and rules for dimensioning lines, radii, holes, and other features. The document also covers tolerancing methods like limit dimensioning and plus/minus tolerancing, as well as tolerancing applications, expressions, accumulation, and various machine elements.
More Related Content
![[Peter fritz, xiong_zheng]_a_finite_element_framew(book_fi)](https://cdn.slidesharecdn.com/ss_thumbnails/peterfritzxiongzhengafiniteelementframewbookfi-160506180409-thumbnail.jpg?width=640&height=640&fit=bounds)
Geometrical tolerances
- 2.
- 3. Objectives • Introduction toDimensions • Terminologies • Important Fundamental Rules • Basics about Dimensioning • Dimensioning Features • Introduction to Tolerances • Applications • Direct Tolerancing Methods • Tolerance Expressions • Tolerancing on various Features
- 4. Introduction to Dimensions •About The Standard ASME Y14.5 • The need of Dimensions • Historical Perspective
- 5. Introduction to Dimensions •Terminologies • Dimension (Basic, Reference) • Geometric Tolerance • Datum • Feature • Feature Control Frame • MMC & LMC
- 6. Introduction to Dimensions •Important Fundamental Rules • Each dimension should have a tolerance • It should fully define the geometry with no room left for assumptions or over definition • The dimensions define the finished part, any processing required should be specified • There should be only one interpretation of every dimension • Dimensions are valid only where they are specified
- 7. Introduction to Dimensions •Typesof dimensioning •Millimeter dimensioning • Zero precedes when the dimension is less than 1 mm. • In case of whole number neither the decimal point nor the 0 is shown • Last digit of fractional dimension is not followed by a zero
- 8. Introduction to Dimensions •Typesof dimensioning •Millimeter dimensioning
- 9. Introduction to Dimensions •Typesof dimensioning •Inch dimensioning • Zero does not precede when the dimension is less than 1 in. • A dimension is expressed in the same number of zeroes as the tolerances
- 10. Introduction to Dimensions •Typesof dimensioning •Inch dimensioning
- 11. Introduction to Dimensions •Basics of Dimensions • Dimension Lines • Alignment • Spacing
- 12. Introduction to Dimensions •Basics of Dimensions • Extension Lines • Crossing of extension lines
- 13. Introduction to Dimensions •Basics of Dimensions • Chain Lines • Leader Lines
- 14. Introduction to Dimensions •Basics of Dimensions • Reference Dimensions
- 15. Introduction to Dimensions •Dimensioning various features • Radii
- 16. Introduction to Dimensions •Dimensioning various features • Foreshortened Radii
- 17. Introduction to Dimensions •Dimensioning various features • Irregular Outlines
- 18. Introduction to Dimensions •Dimensioning various features • Counter bore Holes
- 19. Introduction to Dimensions •Dimensioning various features • Counter sunk Holes
- 20. Introduction to Dimensions •Dimensioning various features • Spotfaced Holes
- 21. Introduction to Dimensions •Dimensioning various features • Chamfers
- 22. Introduction to Dimensions •Dimensioning various features • Location
- 23. Introduction to Dimensions •Dimensioning various features • Location
- 24. Introduction to Dimensions •Dimensioning various features • Repetitive features
- 25. Introduction to Dimensions •Dimensioning various features • Repetitive features
- 26. Introduction to Dimensions •Dimensioning various features • Repetitive features
- 27. Introduction to Tolerances •Application of Tolerances • As direct limits • As a geometric tolerance • In a note or table referring to specific dimensions • In a general tolerance block referring to all dimensions on a drawing for which tolerances are not otherwise specified
- 28. Introduction to Tolerances •DirectTolerancing Methods • Limit Dimensioning
- 29. Introduction to Tolerances •DirectTolerancing Methods •Plus and Minus Tolerancing
- 30. Introduction to Tolerances •ToleranceExpression • Millimeter Tolerance • Inch Tolerance
- 31. Introduction to Tolerances •ToleranceAccumulation • Chain Dimensioning
- 32. Introduction to Tolerances •ToleranceAccumulation • Base Line Dimensioning
- 33. Introduction to Tolerances •ToleranceAccumulation • Direct Dimensioning
- 34. Introduction to Tolerances •ToleranceAccumulation •Dimensional Limits related to an origin
- 35. Introduction to Tolerances •ToleranceAccumulation •Dimensional Limits related to an origin
- 36. Introduction to Tolerances •Tolerancingon different features • Screw Threads • Gears and Splines
- 37. Introduction to Tolerances •Tolerancingon different features • Angular Surfaces
- 38. Introduction to Tolerances •Tolerancingon different features • Conical Tapers
- 39. Introduction to Tolerances •Tolerancingon different features • Radii
- 40. Introduction to Tolerances •Tolerancingon different features • Radii
- 41. Introduction to Tolerances •Tolerancingon different features • Statistical Tolerancing
- 42. Thank You forYour Patience