Geometrical product specifications (GPS) - Basic concepts - Part 4: Geometrical characteristics for quantifying GPS deviations (ISO 17450-4:2017)

ISO 17450-4:2017 specifies general rules for quantifying GPS deviations for individual GPS characteristics.
NOTE GPS deviations can be local or global. A GPS characteristic defined from local GPS deviations is a parameter that transforms the set of local deviations into a global characteristic using a quantifying function (for more details, see Table 1).

Geometrische Produktspezifikation (GPS) - Grundlagen - Teil 4: Geometrische Merkmale zum Quantifizieren von GPS-Abweichungen (ISO 17450-4:2017)

Dieses Dokument legt allgemeine Regeln für die Quantifizierung von GPS-Abweichungen für einzelne GPS Merkmale.
ANMERKUNG   GPS-Abweichungen können lokal oder global sein. Ein GPS-Merkmal, dass durch lokale GPS-Abweichungen definiert ist, ist ein Parameter der die Menge lokaler Abweichungen mittels einer Quantifizierungsfunktion in ein globales Merkmal zu transformiert (siehe Tabelle 1 für weitere Informationen).

Spécification géométrique des produits (GPS) - Concepts généraux - Partie 4: Caractéristiques géométriques pour la quantification des écarts GPS (ISO 17450-4:2017)

ISO 17450-4:2017 spécifie les règles générales pour quantifier les écarts GPS relatifs à des caractéristiques GPS individuelles.
NOTE Un écart GPS peut être local ou global. Une caractéristique GPS définie à partir d'écarts GPS locaux est un paramètre qui transforme l'ensemble des écarts locaux en une caractéristique globale en utilisant une fonction de quantification (pour plus de détails, voir le Tableau 1).

Specifikacija geometrijskih veličin izdelka (GPS) - Osnovni pojmi - 4. del: Geometrijske lastnosti za vrednotenje odstopanj GPS (ISO 17450-4:2017)

Ta del standarda ISO 17450 vsebuje splošna pravila za oblikovanje značilnosti GPS: lastnosti velikosti in geometrijske lastnosti. Opredeljuje nabor značilnosti GPS (lastnost velikosti in geometrijsko lastnost), ki lahko velja za privzeto lastnost GPS ali posebno lastnost GPS, odvisno od risalne oznake, ki ni del tega standarda. Poleg tega ta del standarda ISO 17450 predstavlja način za nadziranje parametrov procesa izdelave z razdelitvijo določene lastnosti iz nabora ene ali več lastnosti.

General Information

Status
Published
Publication Date
30-Jan-2018
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
31-Jan-2018
Completion Date
31-Jan-2018

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SLOVENSKI STANDARD
SIST EN ISO 17450-4:2018
01-april-2018
6SHFLILNDFLMDJHRPHWULMVNLKYHOLþLQL]GHOND *36 2VQRYQLSRMPLGHO
*HRPHWULMVNHODVWQRVWL]DYUHGQRWHQMHRGVWRSDQM*36 ,62
Geometrical product specification (GPS) - Basic concepts - Part 4: Geometrical
characteristics for quantifying GPS deviations (ISO 17450-4:2017)

Geometrische Produktspezifikation (GPS) - Grundlagen - Teil 4: Geometrische Merkmale

(ISO 17450-4:2017)
Spécification géométrique des produits (GPS) - Concepts gnénéraux - Partie 4:
Caractéristiques géométriques (ISO 17450-4:2017)
Ta slovenski standard je istoveten z: EN ISO 17450-4:2018
ICS:
17.040.40 6SHFLILNDFLMDJHRPHWULMVNLK Geometrical Product
YHOLþLQL]GHOND *36 Specification (GPS)
SIST EN ISO 17450-4:2018 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 17450-4:2018
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SIST EN ISO 17450-4:2018
EN ISO 17450-4
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2018
EUROPÄISCHE NORM
ICS 17.040.40
English Version
Geometrical product specifications (GPS) - Basic concepts -
Part 4: Geometrical characteristics for quantifying GPS
deviations (ISO 17450-4:2017)

Spécification géométrique des produits (GPS) - Geometrische Produktspezifikation (GPS) - Grundlagen

Concepts généraux - Partie 4: Caractéristiques - Teil 4: Geometrische Merkmale zur Quantifizierung

géométriques pour la quantification des écarts GPS von GPS-Abweichungen (ISO 17450-4:2017)

(ISO 17450-4:2017)
This European Standard was approved by CEN on 15 October 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17450-4:2018 E

worldwide for CEN national Members.
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SIST EN ISO 17450-4:2018
EN ISO 17450-4:2018 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 17450-4:2018
EN ISO 17450-4:2018 (E)
European foreword

This document (EN ISO 17450-4:2018) has been prepared by Technical Committee ISO/TC 213

“Dimensional and geometrical product specifications and verification” in collaboration with Technical

Committee CEN/TC 290 “Dimensional and geometrical product specification and verification” the

secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by July 2018, and conflicting national standards shall be

withdrawn at the latest by July 2018.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 17450-4:2017 has been approved by CEN as EN ISO 17450-4:2018 without any

modification.
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SIST EN ISO 17450-4:2018
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SIST EN ISO 17450-4:2018
INTERNATIONAL ISO
STANDARD 17450-4
First edition
2017-12
Geometrical product specifications
(GPS) — Basic concepts —
Part 4:
Geometrical characteristics for
quantifying GPS deviations
Spécification géométrique des produits (GPS) — Concepts
généraux —
Partie 4: Caractéristiques géométriques pour la quantification des
écarts GPS
Reference number
ISO 17450-4:2017(E)
ISO 2017
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SIST EN ISO 17450-4:2018
ISO 17450-4:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
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SIST EN ISO 17450-4:2018
ISO 17450-4:2017(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Geometrical characteristic ......................................................................................................................................................................... 3

4.1 General ........................................................................................................................................................................................................... 3

4.2 Types of geometrical characteristic ...................................................................................................................................... 5

Annex A (informative) Relationship to the GPS matrix model ...............................................................................................14

Bibliography .............................................................................................................................................................................................................................15

© ISO 2017 – All rights reserved iii
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SIST EN ISO 17450-4:2018
ISO 17450-4:2017(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee is ISO/TC 213, Dimensional and geometrical

product specifications and verification, in collaboration with Technical Committee CEN/TC 290,

Dimensional and geometrical product specification and verification.
A list of all parts in the ISO 17450 series can be found on the ISO website.
iv © ISO 2017 – All rights reserved
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SIST EN ISO 17450-4:2018
ISO 17450-4:2017(E)
Introduction

This document is a geometrical product specification (GPS) standard and is to be regarded as a general

GPS standard (see ISO 14638). The rules and principles given in this document apply to all segments of

the ISO GPS matrix which are indicated with a filled dot (•).

The ISO/GPS matrix model given in ISO 14638 gives an overview of the ISO/GPS system of which this

document is a part. The fundamental rules of ISO/GPS given in ISO 8015 apply to this document and

the default decision rules given in ISO 14253-1 apply to specifications made in accordance with this

document, unless otherwise indicated.

For more detailed information on the relationship of this document to other standards and to the GPS

matrix model, see Annex A.
© ISO 2017 – All rights reserved v
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SIST EN ISO 17450-4:2018
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SIST EN ISO 17450-4:2018
INTERNATIONAL STANDARD ISO 17450-4:2017(E)
Geometrical product specifications (GPS) — Basic
concepts —
Part 4:
Geometrical characteristics for quantifying GPS deviations
1 Scope

This document specifies general rules for quantifying GPS deviations for individual GPS characteristics.

NOTE GPS deviations can be local or global. A GPS characteristic defined from local GPS deviations is a

parameter that transforms the set of local deviations into a global characteristic using a quantifying function

(for more details, see Table 1).
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 25378, Geometrical product specifications (GPS) — Characteristics and conditions — Definitions

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 25378 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
local geometrical deviation
dP ,dP
() ()

local signed distance between a point, P, of an input feature and a point of the reference feature

Note 1 to entry: d(P) identifies any local geometrical deviation attached to any point (P) of the input feature.

Note 2 to entry: A local geometrical deviation, dP , can be located in an n-dimensional reference space, A ,

attached to the reference feature.

Note 3 to entry: A local geometrical deviation exists in any point of the input feature (see Figure 1). Each local

geometrical deviation of a point of the input feature can be represented in a reference space, A , by the abscises

of its corresponding point of the reference feature and by the ordinate corresponding to the local geometrical

deviation.

Note 4 to entry: A local geometrical deviation can be described as an ordinate of a point of the variation curve

whose abscises are defined in the reference space, A .

Note 5 to entry: A local geometrical deviation is equal to zero when the deviated feature crosses the reference

feature.
© ISO 2017 – All rights reserved 1
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SIST EN ISO 17450-4:2018
ISO 17450-4:2017(E)
Key
1 deviated feature (input feature)
2 reference feature
3 local geometrical deviation
P point of key 1 from which key 3 is defined
Figure 1 — Local geometrical deviation
3.2
reference space

space defined by n curvilinear axes attached to a reference feature in which for each point of an input

feature a local deviation is defined

Note 1 to entry: n is equal to 1 for a reference line, or equal to 2 for a reference surface.

3.2.1
areal reference space
reference space (3.2) when the reference feature is a surface
Note 1 to entry: Reference space for a two-dimensional reference feature.
3.2.2
linear reference space
reference space (3.2) when the reference feature is a line
Note 1 to entry: Reference space for a one-dimensional reference feature.
3.2.3
two-directional reference space

combination of two linear reference spaces (3.2.2) of the same linear reference feature whose vectors

normal to any point P of the reference feature are orthogonal
3.3
quantifying function

mathematical function using the complete set of local deviations to define a geometrical characteristic

as a quantity

Note 1 to entry: A quantifying function can be a rank-order characteristic (3.4) (see Table 1).

2 © ISO 2017 – All rights reserved
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SIST EN ISO 17450-4:2018
ISO 17450-4:2017(E)
3.4
rank-order characteristic

geometrical characteristic defined mathematically from a set of local geometrical deviations

Note 1 to entry: A rank-order characteristic is defined from a quantifying function. Several kinds of rank-order

characteristics exist. The formulae describing them are given in Table 1.
3.4.1
maximum
characteristic maximum value of a set of local geometrical deviations
Note 1 to entry: See Table 1.
3.4.2
minimum
characteristic minimum value of a set of local geometrical deviations
Note 1 to entry: See Table 1.
3.4.3
average
characteristic average of a set of local geometrical deviations
Note 1 to entry: See Table 1.
3.4.4
median
characteristic median value of a set of local geometrical deviations

Note 1 to entry: The median value splits the population of local geometrical deviations into two equal portions

(50 % above and 50 % below). Depending on the distribution of the population, the median value and the average

value can be identical or different.
Note 2 to entry: See Table 1.
3.4.5
mid-range
characteristic mean of the maximum (3.4.1) and the minimum (3.4.2)
Note 1 to entry: See Table 1.
3.4.6
range
characteristic difference between the maximum (3.4.1) and the minimum (3.4.2)
Note 1 to entry: See Table 1.
3.4.7
maximum absolute deviation

characteristic maximum of absolute values of the maximum (3.4.1) and the minimum (3.4.2)

...

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