Applications of GD&T 2-Day
This two-day foundational-level course teaches the thought processes involved in assigning GD&T to components, and it changes the way many engineers think about part tolerancing. The course focuses on what constitutes good and poor drawing practices, common dimensioning methods used in industry, using GD&T to communicate system functions on component dimensions, and the logic of how to apply GD&T to components. You’ll also learn how to select datum features and how to fully define component surfaces using GD&T. Establishing tolerance values is not covered.
You’ll reinforce what you’ve learned by performing a design functional analysis on a part assembly provided by your company, then specifying GD&T on assembly components. (This is optional in case of concerns over drawing privacy.)
Each attendee receives:- Applications of GD&T Workshop Exercise Workbook
- Course notes
- Drawing handouts
Small groups (8-12) are most effective in this hands-on workshop. Those attending will work in teams and actually create GD&T tolerance markups of their company parts.
What Will You Learn
- Describe the importance of technically correct drawings
- List three major areas that affect the creation and interpretation of technically correct drawings
- Explain the common approaches to part tolerancing
- Identify and specify datum features based on the fit and functional requirements of the part
- Use GD&T to communicate functional requirements of a component
- Describe how to specify nonfunctional dimensions
- Explain the five-step approach to functionally dimensioning a component
- Apply the five-step method to functionally dimensioning a component to your company product
Is This Course For You
Materials Provided
Course Requirements
Topics
- Goals
- Conventions
- Prerequisites
- New terms
- Engineering drawings
- Purpose of drawings
- Three common paradigms about drawings
- Effects of a poor drawing
- Benefits of technically correct drawings
- Importance of standards
- Three methods for creating drawings
- How drawing creation affects interpretation
The six principles of dimensioning - The six principles of dimensioning
- Pros and cons of each dimensioning approach
- Dimensioning approach to be used in this class
- Why datum feature selection is controversial
- Selecting datum features based on the functional approach
- Mounting and performing datum features
- Qualifying datum features
- Where to use a linear or geometric tolerance
- Customer robust and customer sensitive dimensions
- Where to use MMC, LMC, and RFS
- Converting functional requirements into GD&T specifications
- What a nonfunctional dimension is
- Risks of not tolerancing nonfunctional dimensions
- Risks of using restrictive general tolerances
- When to apply general or local tolerances
- General tolerancing practices
- Application requirements of general geometrical tolerances
- Interpreting general tolerances
- The functional dimensioning design philosophy
- Advantages of functional dimensioning
- How functional dimensioning supports the PDP
- The principles of dimensioning
- Technically correct drawings
- Review the functional dimensioning process and 5-step method
- Review the DFA
- Review when dimensioning compromises should be considered