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Geometric Dimensioning & Tolerance (GD&T) (3 Days)

Seminar Content

3 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 major differences between GD&T standard of ASME Y14.5M and related Chinese standard on dimensioning and tolerance. The application of GD&T on product design, quality control, gage design and dimension inspection, such as traditional measurement, Vision System and CMM will be explained. 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 Gage Design and Dimension Inspection.

Who Should Attend

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

Seminar Materials

Omnex Training Material with case studies as well as exercises.

Course Outline

• Engineering Drawing/Tolerance
  • Engineering Drawing
  • Dimensioning
  • Dimensioning Standard
• GD&T Introduction, Symbol and Terms
  • History，Purpose，Scope
  • GD&T Symbol ANSI/ISO
  • Measurement Unit
  • Tolerance Indication Methode
  • Implied Perpendicular
  • Differences between GD&T and Coordinate System
  • GD&T Hierarchy
  • Component Assembly
• Datum
  • Datum Definition and Feature
  • Datum and Dimension Fluctuation
  • Datum Reference Frame
  • Datum Precedence Order
  • Datum Simulator
  • Symbol Placement
  • Datum Target
  • Datum Target Point
  • Datum Target Line
  • Datum Area
  • Datum Guide line
  • Free State
  • Datum Shift
  • Datum Application: RFS (Datum RFS)
  • Datum Application: MMC (Datum MMC)
• Feature Control Frame
  • Purpose)
  • Symbol
  • Datum Feature References
  • Material Condition on FOS Datum Reference
  • Datum Sequence and Material Condition
  • Types of Feature Control Frame
• Rules
  • Rule #1, #2
  • Bonus Tolerance
  • Variation of Dimension
  • Variation of Form
  • Virtual Condition
  • Bonus Tolerance
• Form
  • Flatness
    Definition, Requirements
  • Straightness
    Straightness :Definition, Requirements
    Axis –RFS
    Straightness: Axis– MMC
    Straightness: Center Plane - RFS
    Straightness: Center Plane - MMC
  • Roundness
    Definition, Requirements
    Roundness: Cylinder or Cone
    Roundness: Sphere
    Roundness: Nonrigid Parts
  • Cylindricity
    Definition, Requirements
• Orientation
• Perpendicularity
  Definition, Requirements
  Perpendicularity: Plane Surface
  Perpendicularity: Line and Plane Surface
  Perpendicularity: Center Plane
  Perpendicularity: Axis
  Perpendicularity: RFS (Pin or Boss: RFS)
  Perpendicularity: MMC (Pin or Boss: MMC)
  Perpendicularity: MMC (Zero Tolerance at MMC)
• Parallelism
  Definition, Requirements
  Parallelism: Plane
  Parallelism: Axis
  Parallelism: Axis and Plane
• Angularity)
  Definition, Requirements
  Angularity: Plane
  Angularity: Line
  Angularity: Axis
  Angularity: Axis and Plane
• Tangent Plane Position (TOP)
  • Definition, Requirements
    TOP: Hole
    TOP: FOS
    TOP: Bidirection Tolerance
    TOP: Elongated Hole
    TOP: Projected Tolerance
• Position (TOP)
  TOP: Long Holes)
  TOP: Sphere)
  TOP: Slot Patterns
  • Coaxiality
  • Concentricity
  • Composite Position
  • Symmetry
• Runout Tolerance
  • Definition, Requirements
  • To Datum Diameter
  • To Collinear Datum Diameter
  • Total Runout
• Profile
  • Definition, Requirements
  • Profile of Line
    Profile of Line: Bilateral Tolerance
    Profile of Line: Unilateral Tolerance
    Profile of Line: All Around
  • Profile of Surface
    Profile of Surface: Irregular Feature
    Profile of Surface: Conical Feature
    Profile of Surface: Coplanarity Surface
    Profile of Surface: Multiple Surface
  • Composite Profile
• Fixed and Floating Fasteners
  • Fixed Fasteners
  • Floating Fasteners
• GD&T Function Gage Design Case
  • Gage Datum
  • Function Go Gage
  • Gage Tolerance Analysis
  • Gage Risk Analysis
• GD&T Measurement: Instruments, Dia Indicator, Profile Projector, CMM
  • Measurement Datum Setup
  • Measure Error Analysis
  • Form Measurement
  • Orientation Measurement
  • TOP measurement
  • TOP datum setup
  • Composite TOP Measurement
  • TOP with MMC/LMC Measurement, include Bonus Tolerance, Datum Shift
  • Profile Measurement
  • Profile Datum Setup
  • Profile with MMC Measurement, Only Datum Shift
• Tolerance Stackup Case
  • Limit Tolerance Stackup
  • Statistic Tolerance Stackup
• Case Study, Exercise and Test included
• On-site consulting available, include Gage Design, Measurement, Gage and CMM

Prerequisites

Basic knowledge of mechanical blue print reading. Following attendee are recommended: Design Engineer, Quality Engineer, Product Engineer, Manufacturing Engineer, Process Engineer, Inspector, Sales Engineer, Purchasing Engineer, etc.

Training Goals:

• Understand the basic knowledge and requirements of GD&T
• 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 (GB/T1182 and ISO1101) of Dimensioning and Tolerances
• Understand the measurement verification of 14 GD&T requirements, include traditional instruments, CMM, datum setup, coordinate system setup, tolerance analysis.

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, Tolerenc 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图纸案例　（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 (3 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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