A basic 2 day training on understanding of GDnT,Geometrical Dimensioning & Tolerancing to Technical & Egineering Group as a common language in understanding Drawings.
Trainer & Speaker
Timothy Wooi,
20C,Taman Bahagia,06000,Jitra, Kedah. Malaysia
email: timothywooi2@gmail.com
2. GD&T stands for Geometric Dimensioning and Tolerancing,
as defined by ASME Y14.5M-1994.
GD&T: An International Language
Geometric dimensioning and tolerancing is an international language
used on drawings to accurately describe a part. The language
consists of a well-defined set of symbols, rules, definitions, and
conventions that can be used to describe the size, form,
orientation, and location tolerances of part features.
GD&T: An Exact Language
Geometric tolerancing is an exact language that enables designers
to “say what they mean” on a drawing, thus improving product
designs. Production uses the language to interpret the design
intent, and inspection looks to the language to determine set up.
GD&T Provides Uniformity
By providing uniformity in drawing specifications and
interpretation, GD&T reduces controversy, guesswork, and
assumptions throughout the manufacturing and inspection process.
4. Provide Participants with
Fundamental concepts of
GDnT
Enable Participants to
express, understand and
interpret drawing
requirements using GDnT
to ANSI / ASME Y14.5M
Stdandards.
(Based on ASME Y14.5M-1994)
5. ASME, American Society of Mechanical Engineers.
Founded in 1880 by Alexander Lyman Holley, Henry Rossiter Worthington, John Edison
Sweet and Matthias N. Forneyin response to numerous steam boiler pressure vessel
failures.
ASME is an engineering society focused on mechanical engineering in North America, is
thus a standards organization, a research and development organization, a provider of
training and education, and a nonprofit organization.
- A document that communicates a precise description of a part.
- This description consists of pictures, words, numbers, and symbols.
6. Day 1 The Definitions
Datums
Datum feature system (planar datum)
Datum Feature Simulator, Datum targets
Dimension
Basic and Reference,
Using Basic Dimension
Envelop, actual mating
Feature
Control frame, axis Of, Center of Plane, Size
FIM, MMC, LMC,RFS Conditions
Size
Actual, Nominal & Virtual
Tolerance of Position Controls
Bilateral, Geometric, Unilateral, of position
True Geometric Counterpart
(Based on ASME Y14.5M-1994)
7. Day 2
Fundamental Rules
Dimensioning & Tolerancing
Selection & arrangement to suit Function and mating relationship
Rule #1 and Rule #2
Basic dimensions, virtual condition, bonus tolerance
Position Controls
Concentricity, Symmetry
Profile Controls
Profile tolerancing
Profile of a surface
Profile of a line
Workshop
Drawing Interpretation
Presentation
Q & A Discussion
Closing comments
15. Review Day 1, The
Definitions
Datums
Datum feature system (planar datums)
Datum Feature Simulator, Datum targets
Dimension
Basic and Reference, Using Basic Dimension
Envelop, actual mating
Feature
Control frame, axis Of, Center of Plane, Size
FIM, MMC, LMC,RFS Conditions
Size
Actual, Nominal & Virtual
Tolerance of Position Controls
Bilateral, Geometric, Unilateral, of position
True Geometric Counterpart