NF EN ISO 25378

NF EN ISO 25378

June 2011
Standard Current

Geometrical product specifications (GPS) - Characteristics and conditions - Definitions

ISO 25378:2011 defines general terms for geometrical specifications, characteristics and conditions. These definitions are based on concepts developed in ISO 17450-1 and ISO 22432 and they are given by using a mathematical description based on Annex B of ISO 17450-1:2011. ISO 25378:2011 is not intended for industrial use as such among designers, but is aimed to serve as the "road map" mapping out the requirements based on geometrical features, thus enabling future standardization for industry and software makers in a consistent manner. ISO 25378:2011 defines general types of geometrical characteristics and conditions which can be used in GPS. These descriptions are applicable to a workpiece, an assembly, a population of workpieces, and a population of assemblies. These definitions are based on concepts of operators and the duality principle contained in ISO 17450-1 and ISO/TS 17450-2 and on the description of types of geometrical features defined in ISO 22432. Conceptually, these specification operators can be used as specification operators or as verification operators (duality principle). ISO 25378:2011 is not intended to define GPS specifications, symbology or other types of expression.

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Main informations

Collections

National standards and national normative documents

Publication date

June 2011

Number of pages

69 p.

Reference

NF EN ISO 25378

ICS Codes

17.040.01   Linear and angular measurements in general
17.040.40   Geometrical Product Specification (GPS)

Classification index

E04-571

Print number

1 - 21/06/2011

International kinship

ISO 25378:2011

European kinship

EN ISO 25378:2011
Sumary
Geometrical product specifications (GPS) - Characteristics and conditions - Definitions

ISO 25378:2011 defines general terms for geometrical specifications, characteristics and conditions. These definitions are based on concepts developed in ISO 17450-1 and ISO 22432 and they are given by using a mathematical description based on Annex B of ISO 17450-1:2011.

ISO 25378:2011 is not intended for industrial use as such among designers, but is aimed to serve as the "road map" mapping out the requirements based on geometrical features, thus enabling future standardization for industry and software makers in a consistent manner.

ISO 25378:2011 defines general types of geometrical characteristics and conditions which can be used in GPS. These descriptions are applicable to

  • a workpiece,
  • an assembly,
  • a population of workpieces, and
  • a population of assemblies.

These definitions are based on concepts of operators and the duality principle contained in ISO 17450-1 and ISO/TS 17450-2 and on the description of types of geometrical features defined in ISO 22432.

Conceptually, these specification operators can be used as specification operators or as verification operators (duality principle).

ISO 25378:2011 is not intended to define GPS specifications, symbology or other types of expression.

Table of contents
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  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    2
  • 4 Présentation générale
    15
  • 4.1 Principes généraux des spécifications
    15
  • 4.2 Principe général des caractéristiques
    15
  • 5 Caractéristique GPS
    16
  • 5.1 Généralités
    16
  • 5.2 Caractéristique simple et caractéristique de relation
    17
  • 5.3 Caractéristique locale et caractéristique globale
    20
  • 5.4 Élément traité et élément-référence
    20
  • 5.5 Caractéristiques indépendantes
    21
  • 5.6 Caractéristique de zone
    30
  • 5.7 Caractéristique de calibre
    34
  • 5.8 Caractéristique de l'assemblage ou du sous-assemblage
    40
  • 6 Relations entre les différents termes relatifs aux caractéristiques
    45
  • Annexe A (informative) Schémas synoptiques
    48
  • Annexe B (normative) Caractéristique (géométrique) de base
    51
  • Annexe C (informative) Relation avec le modèle de matrice GPS
    60
  • Bibliographie
    61
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