Fundamentals of GD&T
FUNDAMENTALS OF GD&T
Course Agenda
Introduction
GD&T importance
Fundamental Rules
Coordinate tolerancing and its Short Comings
What geometric tolerancing is, and its benefits
Coordinate tolerancing Vs Geometric tolerancing
Key Terms Used in GD&T
Size and actual local size, actual mating envelope, axis, center plane
Complex feature, feature, feature of size, irregular feature of size
Least and maximum material condition
Non-opposed, opposed, partially opposed, pattern
Regardless of feature size
Related and unrelated actual mating envelope
Feature control frame and placement
GD&T Symbols & Modifiers
Geometric characteristic symbols
Geometric modifying symbols
GD&T Rules
Rule #1: applied to a feature of size, exceptions, overriding, inspecting
Independency concept,
Rule #2: All applicable rule
GD&T Concepts
Virtual condition, calculations, and worst-case boundary
Bonus tolerance concept and calculations
Verification principles for a virtual condition boundary
Straightness Tolerance
Derived median line, tolerance zones,
Rule #1 as a straightness control
Applied to a surface and a feature of size
Bonus tolerance (at MMC)
Flatness Tolerance
Derived median plane, tolerance zones
Rule #1 as a flatness control
Applied to a planar surface and feature of size
Bonus tolerance (at MMC)
Circularity Tolerance
Tolerance zones
Rule #1 as a circularity control
Cylindricity Tolerance
Tolerance zones
Rule #1 as a cylindricity control
The Datum System
Implied datums, benefits, terminology
Datum reference frame and symbol
Six degrees of freedom
Coplanar datum feature
Multiple datum reference frames
Datum Targets
The datum target symbols, usage, requirements
Point datum target, line datum target, datum target simulators, movable datum targets
Datum target applications
Size Datum Features: RMB & MMB
Terms, methods to specify a feature of size as a datum feature
Effects of a datum feature (RMB)
Maximum material boundary (MMB) and effects
Datum shift, datum sequence, datum feature simulators
Perpendicularity Tolerance
Perpendicularity and perpendicularity tolerance
Common tolerance zones
Modifiers used with perpendicularity tolerance
Parallelism Tolerance
Parallelism and parallelism tolerance
Common tolerance zones
Modifiers used with parallelism tolerance
Description
In today’s modern and technically advanced design, engineering and manufacturing world, effective communication is required to ensure the design and manufacture of successful products. Success oriented organizations, which require accurate and common lines of communications between engineering, design, manufacturing and quality consider knowledge of GD&T as an essential skill for design professionals.
The best design in the world is worthless if it cannot be produced!
In this Course we teach you the GD&T as prescribed in the ASME Y14.5-2009 Standard which is the need of the hour in Industries.
You’ll get an in-depth explanation of geometric symbols, including each symbol’s requirements, tolerance zones, and limitations. The class includes a comparison of GD&T to coordinate tolerancing; an explanation of tolerance zones; Rules #1 and #2; form and orientation controls; tolerance of position; runout and profile controls.