Geometric dimensioning and tolerancing according to ISO and ASME standards

Programme and exercises

GPS – product geometric specification.

Structure of GPS standards.

Classification of dimensions.

GD&T – geometric dimensioning and tolerancing versus GPS.

Classification of geometric tolerances.

Symbolism of geometric tolerances.

GDT general tolerance:

for linear dimensions,

for angular dimensions,

determination of general tolerances.

Tolerating the free state.

Shape tolerances:

straightness,

flatness,

circularity,

cylindricality,

the shape of the designated outline (without bases),

the shape of the designated area (without bases).

Metrological traceability of shape deviations.

Bases: their types and base layouts.

Direction tolerances:

parallelism,

perpendicularity,

inclination.

Position tolerances:

position,

concentricity/coaxiality,

symmetry.

Tolerances of the designated shape-outline and the shape of the designated surface (with bases).

Run-out tolerances.

Conditions (rules) used in tolerating (MMC, LMC, RMC, EC).

Exercises:

• Examples of specifying the requirements on drawings.
• Interpretation of the provisions of the GDT requirements.
• Solving problems and tasks in teams, discussion.
• Reading specification notes on technical drawings.
• Interpretation of requirements with the maximum material condition.
• Measurement of selected geometric tolerances (parallelism, run-out, etc.).
• Calculation of permissible geometric tolerances.