Course Summary
This two-day course is an advanced GD&T tolerance accumulation analysis course. If you have been through the GD&T Fundamentals and Advanced Concepts courses, and you’re responsible for determining the effects of tolerances, this course is for you. This program is an extrapolation of your education in the Y14.5-2009 standard.
Target Audience
This program is designed for anyone who is extremely familiar and proficient with the concepts and practices of GD&T. Particular emphasis is placed on those who are responsible for specifying, interpreting, and analyzing tolerances. Individuals desiring to become certified Geometric Dimensioning and Tolerancing Professionals (GDTP) by passing the ASME GDTP certification exams should take this course.
Course Objectives
This program begins with a review of GD&T, then continues with practical team exercises designed to educate each participant in how to properly determine the worse-case effects of specified tolerances. This class is a minimum lecture, maximum experience and participation format.
Agenda
- What is a tolerance stack?
- Why we do stacks?
- “Grounding out” parts for a given stack
- Introduction to the two-column method, the stacks form and stack path
- Stacks using coordinate tolerances
- Stacks using Runout
- Stacks using Concentricity and Symmetry
- Stacks using form controls or orientation controls applied to a surface
- Straightness or Perpendicularity applied to a feature of size at MMC
- Stacks using Tolerance of Position (TOP) at RFS
- Stacks using TOP with bonus tolerance
- Stacks using TOP with bonus tolerance and datum shift
- Stacks using Profile
- Stacks using Profile and TOP and the term “Boundary”
- Special-Case Stacks
- Will two parts assemble
- With just one hole and one pin?
- With two holes and pins?
- With two holes and pins with geometric effects?
- When including the effects of a straightness or TOP callouts on a bolt?
- With floating fastener formulas?
- With a threaded hole in the housing and a pin pressed into the cover?
- Minimum “friction land” between bolt and cover
