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Geometric Dimensioning and Tolerancing for Quality, Inspection and Reporting (Virtual Classroom)

This course focuses on how to apply Geometric Dimensioning and Tolerancing (GD&T) in inspection and apply content from the ASME Y14.45-2021 Standard for Measurement Data Reporting.

This Standard was last reviewed and reaffirmed in {{activeProduct.ReaffirmationYear}}. Therefore this version remains in effect.

Geometric Dimensioning and Tolerancing for Quality, Inspection and Reporting (Virtual Classroom)
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Description

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Course Schedule:  This course commences each day at 10:30 AM and ends at 2:30 PM Eastern, each day, with breaks scheduled throughout.

Modern GD&T (Geometric Dimensioning and Tolerancing) inspection practice in industry has moved away from simple pass/fail gaging, and increasingly uses measurement equipment that produces numerical results. It’s becoming more important for engineers and others to know how to define numerical values to measure and report at the inspection stage.

This includes hand tools such as height gages and dial indicators, as well as technology such as CMM's (Coordinate Measuring Machines), roundness testers, and 3D laser scanners. A major challenge in using these technologies for GD&T inspection has been a lack of standard definitions for measured values, which has led to significant inconsistencies in the measured values calculated by different systems. This course reviews the ASME Y14.45 definitions for measured values and how to calculate them, as well as providing industry best practices on the content of GD&T inspection reports.
 
By participating in this course, you will learn how to successfully:

  • Examine a GD&T drawing and identify which numerical values would require verification on an inspection report according to ASME standards, and which would not
  • Describe the actual value of a given geometric tolerance in terms of a zone, and recognize it on a depiction of an actual part feature
  • Identify the correct adjustments available and calculate measured values for form, orientation, location, and runout tolerances from indicator measurement data
  • Compare the options available when reporting actual values for multi-feature GD&T applications, such as Position tolerances on hole patterns
  • Describe potential root causes for discrepancies in GD&T inspection results, relating to metrology software programming and calculation algorithms
  • Complete a GD&T inspection report which includes Method A conformance, Method B measured values, and Method C supplemental data as per the ASME Y14.45-2021 Standard

Who should attend?
Quality Engineers, Design Engineers, Inspectors, Engineering Managers, Supplier Quality Engineers, CMM Programmers, Manufacturing Engineers - anyone who is involved in creating, reviewing, and interpreting GD&T inspection reports.
 
This course complements Geometric Dimensioning & Tolerancing Fundamentals and expects prerequisite knowledge of the fundamentals in the topic.
 
Course Materials (included in purchase of course)

  • Digital course notes via ASME’s Learning Platform
  • Exercise sheets
  • Example drawings, measurement data examples and data reports

 
Supplemental Course Materials (not included with course, purchase separately)

  • ASME Y14.5-2018 Standard
  • ASME Y14.45-2021 Standard
  • GeoTol Pro book or other GD&T textbooks and pocket guides based on ASME Y14.5 Standard are useful but not necessary

This ASME Virtual Classroom course is held live with an instructor on our online learning platform.  Certificate of completion will be issued to registrants who successfully attend and complete the course.

Buying for a team? Get ASME Corporate Training.

Set up a customized session of this course for your workforce. Contact learningsolutions@asme.org to learn more about group rates.

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Outline

GD&T Review  

  • Features, Tolerance Zones, Datum Reference Frames 
  • Geometric tolerances as attribute pass/fail characteristics 
  • Difference between geometric tolerancing and plus/minus tolerancing 
  • Basic dimensions 

Actual Values

  • Actual Value concepts and definitions from ASME Y14.5.1-2019 – Mathematical Definition of Dimensioning and Tolerancing Principles 
  • Actual value concept for simple single-feature tolerances – smallest tolerance that the feature will conform to 
  • Actual value concept for mixed tolerance values and simultaneous requirements – Growth Parameter g 
  • Open degrees of freedom and candidate actual values 
  • Geometric tolerances as optimization within constraints 
  •  Measurement data reporting for Size tolerances 
  •  Position tolerances – Axis Method, Surface Method, Equal Bilateral, unequally disposed and unilateral and dynamic 
  • Position tolerances – Surface Method 
  • Measurement data reporting for patterns and groups 

GD&T Inspection Calculations Using Indicator-Type Inspection Equipment

  • Indicator inspection concept – sweeping along a perfect feature counterpart 
  • Perfect features result in reading of zero 
  • Absolute indicator readings versus Full Indicator Movement (FIM) 
  • Connection between geometric tolerance zones and indicator sweeps 
  • Indicator adjustments resulting from tolerance zone transformations 
  • Partial optimization for conformance versus full optimization for actual value 
  • Indicator and workpiece adjustments for form, orientation, and runout tolerances 
  • Calculating measured values from indicator measurement data  

GD&T Inspection Using 3D Coordinate Metrology

  • CMM concept of substitute features versus ASME GD&T concept of high point contact 
  • Sampled point data versus full surfaces 
  • General measuring software versus GD&T verification 
  • Least Squares best fit 
  • Size measurement – Rule #1 and Actual Local Size 
  • Maximum Inscribed and Minimum Circumscribed features 
  • Datum Feature Precedence 
  • Simulating Hard Gage Contact - High Point and Constrained High Point algorithms 
  • Stable alignments versus shiftable 
  • Soft gaging 

  
ASME Y14.45-2021 Measurement Data Reporting

  • Characteristic identifiers 
  • Method A – Pass/Fail conformance assessment 
  • Method B – Measured Value of Characteristic 
  • Method C – Addition numerical information 
  • Data Report format 
  • Complete reporting and reduced reporting 
  • Basic dimensions 
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Evan Janeshewski

President, Axymetrix Quality Engineering, Inc.

Evan Janeshewski is the founder and president of Axymetrix Quality Engineering Inc. in Langley, BC. Evan has more than 20 years of experience teaching GD&T at beginner, intermediate and advanced levels.

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