Workshops and Seminars
Geometric Dimensioning and Tolerancing
Fee: $1,045
Instructor: Donald E. Day
WHO SHOULD ATTEND:
This intensive two-day seminar is intended for those who create or read engineering drawings of molded plastic parts.
EDUCATIONAL GOALS:
The clearest way to completely define the geometry of molded plastic parts is by using geometric dimensioning and tolerancing in accordance with the current ASME Y14.5 standard commonly know as the GD&T (geometric dimensioning and tolerancing) standard. Those who attend will be taught how to deal with process effects such as draft, parting lines, ejectors, and gates on the engineering drawing and in the CAD file.
SEMINAR OUTLINE:
1. Overview of the Benefits of Applying GD&T Early in Plastic Part Design
- Determining the best part geometry
- Robust producible designs
- Asking the right questions
- Document the answers
- The effect of draft and other molding characteristics on datum features
- Datum targets
- Constraint notes
- Flatness, straightness, circularity, and cylindricity as refinements of size, orientation, and location
- Perpendicularity, parallelism, and angularity as refinements of location and to control datum features
5. Location Controls
- Position, profile, and run-out applied to molded features
- Using composite tolerances to control patterns of features and refine location
- Inspecting profile, position, and run-out
- Dealing with draft, ejectors, gates, warpage, shrink, sink, and flash
- Selecting the most appropriate and complete notes
- Exact constraint, optimum geometry, and tolerance calculations to assure proper mating
8. Minimally Dimensioned Drawings
- Applying tolerances to the CAD model
- Using the CAD model for inspection
- The future of drawings