(Available for ASME Y14.5 and ISO 1101)

Objectives:

Upon completion of the course, students will be able to:

1. Encode part function using the GD&T tools
2. Decode GD&T symbols for functional tolerance analysis and
3. Use GD&T to maximize fault tolerance and unambiguously specify manufacturing and product quality objectives

To achieve the above objectives, the following topics are covered during the course:

1. Reviewof the most important GD&T concepts, definitions, tools and rules
2. Detailed instruction in the design process , consisting of feature function analysis and GD&T encoding
3. The rules for Datum Feature selection
4. The rules for Datum Feature geometry control
5. Datum Reference Frame functionality analysis and refinement
6. Considered Feature and Datum Feature Material Condition Modifier selection
7. " Virtual " and " Resultant " Condition concepts as design tools
8. Compound and Composite Feature Control Frames as feature function encoding tools
9. Decoding and re-encoding of GD&T decorated CAD models to maximize fault tolerance and ensure true capture of functional intent
10. Drawing ergonomics to ease the interface with manufacturing
11. The management of draft in molded parts
12. The use of the Free State Modifier for the management of non-rigid part geometry
13. Tolerance analysis for mating parts and testing for rigor in the application of GD&T tools

Because of the advanced knowledge and concerns of the participants, the choice of topics dealt with is heavily influenced by their interests and by the drawings they submit.

Duration:
2-days
The material of this course can be delivered in two days. Nevertheless, real learning requires active implementation, and a third day of client oriented exercises is highly recommended. Please specify preference at time of quoting.

Target Audience:
All persons dealing with Product Design, Drafting and Tool Design.

Prerequisites:
Participation in the Smart GD&T course "Intermediate GD&T for Design, Manufacturing & Inspection" or equivalent, and at least one year of design experience.

Materials:
Course handouts include the Advanced GD&T for Design course manual, a copy of the Little Encyclopedia of GD&T, and sundry articles and flyers. Participants are encouraged to provide their own lined pads, pencils (making it easy to erase occasional mistakes), and pocket calculators. A personal or company owned copy of the ASME Y14.5M 1994 (or ISO 1101) standard should be brought to each session.

Confidentiality:
In the case of in-house corporate classes, a non-disclosure agreement should be implemented between the sponsor and Multi Metrics, Inc. prior to inception. Drawings and parts brought to public classes should be non-proprietary in nature.

Syllabus:

Day 1:

• A fast paced review of Y14.5 1994 (or ISO 1101) GD&T concepts, definitions, tools and rules
• Initial analysis and discussion of drawings submitted for review
• Selection criteria for Datum Features and assessment of their viability
• Selection criteria for Datum Features
• The Datum Feature "creation myth" and the control of "intrinsic" and "extrinsic" Datum Feature characteristics
• The Smart GD&T Design Process
• Selection criteria for Considered Feature Material Condition Modifiers
• Selection criteria for Datum Feature Material Condition Modifiers
• Selection criteria for other tolerance zone Modifiers, including Projection, Free State and Datum Feature Material Location Modifiers.
• Selection criteria for tolerance values with exercises
• Using the Virtual and Resultant Condition concepts as design tools for mating part features, including fixed and floating fastener applications

Day 2:

• Using Compound and Composite Feature Control Frame as design tools
• The Smart GD&T Design Process comprising step by step encoding instructions
• A Case Study, starting with the decoding of a proposed implementation and followed by several re-encoding iterations, including the influence of the mating part
• Managing draft in molded parts
• Managing the geometry of non-rigid plastic and sheet metal parts using constraint notes and the Free State modifier
• Special Topics: Boundary Position Tolerancing / use of a zero tolerance at MMC to impose MMC envelope orientation control / other
• As time permits, analysis and discussion of participant's drawings
• Grand Review

Day 3:

• Concentrated practical implementation, including in-depth analysis and discussion of participant's drawings, GD&T encoding of "naked" drawings, GD&T decoding of encoded drawings as the basis for function and tolerance analysis, and finally, re-encoding of improved designs, based on an improved understanding of feature functions.