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Geometric Dimensioning & Tolerance (GD&T) (2 Days)

Seminar Content

2 Days This seminar explains the content of GD&T as well as detailed requirements of GD&T of manufacturing industry of North America per ASME Y14.5M-1994. The seminar combines abundant real examples of automotive industry to help the understanding and implementation of GD&T on design, production and inspection. The course also compares the majoer differences between GD&T standard of ASME Y14.5M and related Chinese standard on dimensioning and tolerance. GD&T is widely used on design, production and quality area, including blue print reading, meaning and understanding. GD&T is the important tool of product realization process, it’s also the professional language to understand the requirements of customer, especially automotive OEMs.

Training Features

Combined abundant really cases of automotive industry as well as provided cases from the trainee, explain in details of the content and requirements of GD&T and implementation on design, production and inspection.

Who Should Attend

Design Engineer, Quality Engineer, Process Engineer, Manufacturing Engineering, Gage Engineer, APQP team member, and Inspector.

Seminar Materials

Omnex Training Material with case studies as well as exercises.

Course Outline

• GD&T Introduction, Symbols and Terms
  • History，Purpose，Scope
  • Engineering Drawing
  • Dimensioning Standard
  • Material Condition
  • Tolerance Modifier
  • Difference between GD&T and Coordinate System
  • GD&T Hierarchy
  • Radius and Controlled Radius
  • Tolerancing Introduction
• Rules and Concept
  • Rule #1, #2
  • Basic Dimension
  • Virtual Condition
  • MMC/LMC/RFS
  • Bonus Tolerance
• Datum
  • Definition and Datum Feature
  • Datum Simulator
  • Symbol Placement
  • Datum Target
  • Datum Guide line
  • Free State
  • Datum Shift
  • RFS (FOS Datum: RFS
  • MMC (FOS Datum: MMC)
• Form
  • Flatness
  • Straightness
    Straightness: Surface
    Straightness: Center Surface
  • Roundness
  • Cylindricity
• Orientation
  • Perpendicularity
  • Parallelism
  • Angularity
  • Tangent Plane
• Position (TOP)
  • TOP Definition
  • TOP Theories
  • TOP Application: RFS (TOP: RFS)
  • TOP Application: MMC (TOP: MMC)
  • TOP Calculation)
  • Composite Position
  • Symmetry
  • Fixed Fasteners
  • Floating Fasteners
• Profile
  • Surface Profile
  • Line Profile
  • Composite Profile
  • Coplanarity Applications
  • Calculation
• Concentricity/Symmetry
  • Concentricity
  • Symmetry Control
• Runout
  • Circular Runout
  • Total Runout
  • Runout Calculation
• Case Study, Exercise and Test included
• On-site consulting available, include production, measurement, Gage and CMM

Prerequisites

Basic knowledge of mechanical blue print reading and implementation. Production process experience is preferable. Following attendee are recommended: Design Engineer, Quality Engineer, Product Engineer, Manufacturing Engineer, Process Engineer, Inspector, etc.

Training Goals

• Understand the requirements of GD&T, reduce the leadtime of design, reduce the engineering change, improve the design quality.
• Learn how to apply GD&T to understand the design purpose of the customer, improve the reliability of product design and process design.
• Emphasize the understanding principles of verifying GD&T
• Learn the concept of MMC, LMC and RFS
• Use GD&T to improve the dimension verification and inspection, understand the ASME Y14.5M-1994 requirements, such as geometric tolerance, symbols, terms, rules and application
• Understand the differences between GD&T requirements of North America (ASME Y14.5M) and Chinese Standard of Dimensioning and Tolerances

Methodology:

• Team Exercises
  • With the team exercises to improve the understanding of training content, GD&T requirements and application
• Training Evaluation：
  • Attending rate and participation, include:
  • Meaningful questioning in classes
  • Discussion involvement and knowledge sharing
• Graded Exercises
  • To evaluate the training effectiveness with Graded Exercises
• Final Evaluation
  • Final Test with grading, evaluation and follow-up improvement

GD&T Related Training Courses (provided by Omnex):

• Blue Print Reading: 1 day
• GD&T Understanding & Implementation: 3 days
• Tolerance Stack-up Analysis: 2 days (GD&T knowledge required)
• GD&T Gage Design: 2 days (GD&T knowledge required)

Why do we need GD&T training?
(Training for GD&T, Gage Design, Tolerence Stackup)

Our training is focusing on the two major standards for Geometrical Tolerencing:

1. Europe Standard: ISO1101 (China Standard: GB/T 1182, similar to ISO1101)
   Major Features: linear tolerance (or +/- tolerance) method
2. USA Standard: ASME Y14.5M-1994.
   Major Feature: GD&T tolerencing method, such as position and Profile tolerance as below:

GD&T Drawing Example:

Omnex GD&T series trainings will help you to learn:

1. How to understand 14 Geometrical Tolerance, especially TOP and Profile?
2. What are the differences between coordinate system (+/- Tolerance) and GD&T?
3. What are the differences between ISO1101 and ASME Y14.5M-1994?
4. What is the composite Tolerance of Position and Profile?
5. What does it mean if Material conditions (MMC/LMC) is applied to GD&T and datum？
6. What is Rule #1 and Rule #2？
7. What is the criteria to properly select GD&T datum?
8. What is the relationship between the 14 GD&T tolerances?
9. How to measure the GD&T（traditional method, Gage, Vision System, CMM）？
10. How to develop the Function Gage for GD&T?
11. How to calculate GD&T tolerance stackup to ensure the correct assembly design?

Training Agenda (2 Days)

Our Customers - GD&T Related Training by Omnex (Partial)

Omnex Shanghai Office
Greenland He Chuang Building No. 450, Room 2401, Shanghai 200063, China
Phone: 021-3360 8488, 3360 8468, Fax: 021-3360 8408, Email : info-cn@omnex.com

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