C r u c i a l K n o w l e d g e
4227 Crooked Stick Drive
Frisco TX 75035
301/412-5966
Geometric Dimensioning & Tolerancing for Inspection, Design & Engineering
Course Description:
Geometric Dimensioning & Tolerancing for Design and Engineering. This course is designed for those employed in the inspection, design and engineering fields and introduces the key elements, symbols and concepts needed to create and interpret engineering designs and drawings incorporating the concepts of Geometric Dimensioning and Tolerancing. Students gain an understanding of and ability to apply GD&T principles to design, manufacturing and inspection in accordance with ASME Y14.5M-1994 and 2009 standards.
Prerequisites:
Practical inspection, design and/or engineering experience and math skills.
Required Textbook:
The GD&T Hierarchy Y14.5-2009 Textbook
Fundamentals Full Color Textbook by Don Day
(in accordance with Y14.5-2009)ISBN 978-0-9844325-6-1
The GD&T Hierarchy textbook is intended to aid in the instruction of Geometric Dimensioning and Tolerancing (GD&T) in accordance with the ASME Y14.5-2009 standard as well as the ASME Y14.5M-1994. Where a concept is new to the 2009 revision of the Standard it has a shaded background. Coverage also includes selected topics from ASME Y14.41.
This full color text is in landscape format which makes it possible to include more complex drawings than are usually found in a GD&T text. There are over 200 pages with many illustrations of drawings and solid models of actual parts drawn from industry. In addition to containing the rules, terms and definitions of GD&T, this text makes exclusive use of the GD&T Hierarchy to explain the relationship between tolerances and to guide the reader to the most appropriate applications.Course Objectives
At the successful completion of this course, the student should be able to:
- Ascertain and incorporate GD&T symbology in production drawings to facilitate the proper fabrication, measurement and inspection of components
- Accurately determine, define and draw tolerance zones in production drawings
- Design, apply and draw reference frame instructions on production drawings to facilitate the proper fabrication, measurement and inspection of components
- Define and discern the relational requirements of tolerance zone characteristics, as related to datums, and apply them to production drawings
- Analyze fastener conditions and accurately convey their properties to production drawings
- Calculate appropriate tolerance formulas and apply their outcomes to production drawings
- Construct soft gauge calculations validating part conformity for production drawings
- Develop functional gauges to validate part conformity and apply the concepts of material condition modifiers based on design requirements.
Highlights of the textbook include:
• Numerous Rules of Thumb
• Overlays to illustrate concepts
• Flowcharts
• Dynamic tolerancing diagrams
• Former practices of the 1994 standard highlighted
Topical Outline:
Chapter 1 - Introduction and Course Objectives
- Introduction - Geometric Shapes
- Multi-functional Design Team
- What Is GD&T?
- Geometric Tolerances
- Evolution of Engineering Drawings
- Basic Dimensions
- GD&T Symbols
- Statistical Tolerancing
- The GD&T Hierarchy
Chapter 2 - Features
- Actual Envelopes
- Features of Size
- Irregular Features of Size
- Material Condition Modifiers
- The Feature Control Frame
- Boundaries
- Individual Feature of Size, Rule #1
- Continuous Feature
- Independency Symbol
- Virtual Condition
- Applicability of Modifiers
- Screw Thread Rule
- Some Inspection Terms
Chapter 3 - Datums
- Degrees of Freedom
- Datum Feature Simulators
- Degrees of Freedom Chart
- Datum Precedence
- Multiple Datum Features
- Datum Feature Selection
- Datums Must Be of Sufficient Size!
Chapter 4 - Datum Feature Controls
- Affect of Modifiers
- Rotational Constraint
- Datum Translation
- Irregular features of Size as Datum Features
Chapter 5 - Datum Concepts
- Simultaneous Requirements
- Restraint Clarified
- Datum Targets
- Movable Datum Targets
- The Coordinate System
- Labeling the Coordinate System
- Degrees of Freedom
- Customized Datum Reference Frame
- Mathematically Defined Surface
- Clarifying Applicable Boundaries
- Repetitive Patterns of Features
Chapter 6 - Form: Straightness, Flatness, Circularity and Cylindricity
- Flatness
- Flatness Applied to a Size Dimension
- Former Practice
- Sample Inspection
- Straightness
- Sample Inspection
- Circularity
- Sample Inspection
- Cylindricity
- Sample Inspection
Chapter 7 - Orientation: Angularity, Perpendicularity and Parallelism
- Perpendicularity
- Sample Inspection
- Parallelism
- Sample Inspection
- Angularity
- Sample Inspection
- When to Use Orientation Controls
- One Orientation Symbol
- Tangent Plane
Chapter 8 - Profile
- Profile as a General Requirement
- Application Options for Profile Summarized
- Unequally Disposed Profile
- Unilateral Profile Tolerance
- Composite Profile Tolerancing
- Combined Controls
- Coplanarity
- Non-Uniform Zone
- Profile per Unit Length
- Sample Inspection of Profile
Chapter 9 - Position and Symmetry
- Position
- Surface Interpretation
- Pattern Location
- Composite Position Tolerancing
- Inspecting Position
- Projected Tolerance Zone
- Fastener Tolerance Formula Calculations
- Symmetry
- Sample Inspection
Chapter 10 - Coaxial Features
- Position
- Sample Inspection
- Concentricity
- Sample Inspection
- FIM (Full Indicator Movement)
- Runout
- Sample Inspection
- Runout Summary
- Profile Controlling Coaxiality
- Sample Inspection
Methods of Instruction
Instructional methods include:
(1) presentation by lecture,
(2) discussions,
(3) individual guidance;
(4) reading assignments;
(5) demonstrations;
(6) practice sessions;
(7) in class skill checks;
(8) final examination (optional).
This document is not intended for wide distribution
Authored by Gary Burch on June21, 2013
Crucial Knowledge
4227 Crooked Stick Drive
Frisco TX 75035
(301) 412-5966