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Two days GD&T Course for Virtue Technology Sdn Bhd.Day2
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Transcript of Two days GD&T Course for Virtue Technology Sdn Bhd.Day2
Geometric Dimensioning & Tolerancing
(GD&T) 23-24th Aug 2017
For: Virtue Technology Sdn BhdAddress: PLOT 202, Lorong Per. Bukit Minyak 11, Kaw Per. Bkt Minyak, 14100 Bukit Tengah, Penang
Presented by: Timothy WooiFor: JMC Group of Companies
Geometric Dimensioning & Tolerancing (GD&T)
Day-2, MorningSimultaneous Requirements for Combined parts Profile Controls
Profile tolerancing- Computation of holes in relation to leading hole in various materials condition.
Composite Position Tolerance
- Application of the condition to achieve better machine settings.
Exercise
Computation and interpretation
Geometric Dimensioning & Tolerancing (GD&T)
Two Single Segment Feature Control Frame- Interpretation and understanding- Exercises and examples - Assessment test: -Using GD&T on various component, interpret fabrication of parts successfully considering business factors.
Day-2, Noon
Geometric Dimensioning & Tolerancing (GD&T)
Inspection for proper Tolerances & Dimensioning- Appropriate and correct approach of during inspection. - Correct position and method of measurement of parts based on the technical drawings. - Datum & relevant Selection - Definition of datum reference frame –
Definition of datum reference points -Decision Diagrams Study of Sample Drawings -Exercise and Workshop: Interpretation of sample mechanical drawings. -Convert from +/- to true position tolerancingConclusion and Q & A session
End of day 2
Why GD&T?
(Based on ASME Y14.5M-1994)
Geometric Dimensioning & Tolerancing (GD&T)
To allow Participants to master techniques of GD&T in the ASME standard to;
integrate smoothly into engineering design applications and modern inspection systems at work.
Provide Participants with Fundamental concepts of GD&T to express, understand and interpret drawing requirements using GD&T to ANSI / ASME Y14.5M Standards.
In-depth knowledge of GD&T application allows optimum form, fit & function between the various complex pieces of parts assembly.
Starting with basic principles in coordinate dimensioning & tolerancing and progressing on these principles to understand & apply GD&T requirements to ad concepts to real work applications.
Application & Advantages of GD&T
Geometric Dimensioning & Tolerancing (GD&T)
Review of Day 1GD&T Rules Based System
The Definitions
Geometric Dimensioning & Tolerancing (GD&T)
Fundamental Rules. -application examples on sizes
and dimensions. Dimensioning and tolerancing
philosophy.
There are some Fundamental Rules that need to be applied.These can be found on the GD&T Rule Based System.
Fundamental Rules
Exercises
Geometric Dimensioning & Tolerancing (GD&T)
Rules for Drawing and DesignsEnvelope Principle.
• Rules for Gear and Splines.
• Regardless of feature size.(RFS) settings
• Maximum Material Condition (MMC)
• Least Material Condition (LMC).
• Virtual Condition and Resultant Condition.
Geometric Dimensioning & Tolerancing (GD&T)
Rules
Review of Day 1GD&T Rules Based System
Common Symbols in GD&T.
List of symbols and their interpretation Assessment
Common Symbols in GD&T
Exercise
Study of tolerancing condition
Maximum Material Condition (MMC),
Least Material Condition (LMC) and
Regardless of Feature Size (RFS)
application and interpretation
GD&T Symbols
Standards for GD & T. – ASME, - ISO, - Din
ASME StandardsASME Y14.5 – Dimensioning and TolerancingASME Y14.5M-1994 Dimensioning and TolerancingASME Y14.5.1M-1994 Mathematical Definition of Dimensioning and Tolerancing Principles
Many multi-national corporations use ASME Y14.5 (ASME Y14.5M-1994 or ASME Y14.5-2009) as their GD&T standard worldwide for all of their international operations.
The ASME Y14.5 standard is considered the authoritative guideline for the design language of GD&T.
ASME Y14.5-2009 is a replacement of ASME Y14.5M-1994.
ISO 1101:2004 Geometrical Tolerancing.
Standards for GD & T. – ASME, - ISO, - Din
The International Organization for Standardization (ISO) also has a version of GD&T, which they call ISO 1101 Geometrical Dimensioning and Tolerancing (GD&T).
At present the ISO standards do not recognize the interpretation of concentricity and symmetryas defined in the ASME Y14.5M 1994 standard.
The concentricity and symmetry characteristics in ISO have the same interpretations as the position characteristic in the ASME Y14.5M 1994 standard.
Simultaneous Requirements for Combined parts
Profile tolerancing- Computation of holes in relation to leading hole in various materials condition.
Geometric Dimensioning & Tolerancing (GD&T)
Day-2, Morning
Profile Control
Simultaneous Requirements for Combined parts
Composite Position Tolerance
- Application of the condition to achieve better machine settings.
Geometric Dimensioning & Tolerancing (GD&T)
Day-2, Morning
Position Control
Simultaneous Requirements for Combined parts Exercise
Computation and interpretation Envelope Principle.
• Rules for Gear and Splines.
• Regardless of feature size.(RFS) settings
• Maximum Material Condition (MMC)
• Least Material Condition (LMC).
• Virtual Condition and Resultant Condition.
Geometric Dimensioning & Tolerancing (GD&T)
Exercise, Rules
Day-2, Morning
Day-Two Noon
Geometric Dimensioning & Tolerancing (GD&T)
Inspection for proper Tolerances & Dimensioning- Appropriate and correct approach
of during inspection. -Correct position and method of measurement of parts based on the technical drawings. -Datum & relevant Selection -- Definition of datum reference frame –
Dimension
Day-Two Noon
Geometric Dimensioning & Tolerancing (GD&T)
Definition of datum reference points -Decision Diagrams Study of Sample Drawings
Datum new
Day-Two Noon
Geometric Dimensioning & Tolerancing (GD&T)
Exercise and Workshop: Interpretation of sample mechanical drawings. -Convert from +/- to true position tolerancingConclusion and Q & A session End of day 2
Datum new
Thank You!
End of Day 2
Geometric Dimensioning & Tolerancing (GD&T)