Tiêu chuẩn iso 01938 2 2017

© ISO 2017 Geometrical product specifications (GPS) — Dimensional measuring equipment — Part 2 Reference disk gauges Spécification géométrique des produits (GPS) — Équipement de mesurage dimensionnel[.]

Geometrical pr oduct specifications

Part 2:

S éc ification g ométrique des produits (GPS)— Éq ipement de

me sura e dimension e l —

Partie 2: Disques de réér nc p ur calibre s

Fir t edition

2 17-0

Refer ence n mb r

ISO 1 3 -2:2 17(E)

COPYRIGHT PROTECTED DOCUMENT

© ISO 2017, P blshed in Sw itz rlan

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written permis ion Permis ion c n be req esed from either ISO at the ad r es below or ISO’s member bod y in the c u try of

the r eq eser

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C de Blan on et 8 • C 4 1

CH-1 14 Vernier, Geneva, Switzerlan

Tel + 12 7 9 011

Fax 412 7 9 0 4

c pyrig ht@iso.or g

www.iso.or g

F reword i v

Introduction v

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Terms and definitions 1

4 Symbols and abbreviated terms 2

5 Desig n character istic 2

6 Metr olog ical characteristic 2

7 Max imum per mis ible l mits o metr olog ical characteristic 3

8 Mar king 5

A nne x A (informative)Mater ial me sure (r eferenc e)of the wor king size, WS, of a gap gaug e 6

A nne x B (informative)Relatio to the GPS matrix mo el 9

Biblog raphy 11

ISO (he Int ernational Org nization for Stan ardization) is a worldwidefede ation of national s an ards

b dies (ISO membe b dies) The work of pr p ring Int ernational Stan ards is normaly car ied out

through ISO t ech ical committ ees Each membe b dy int er st ed in a subje t for w hich a t ech ical

committ ee has be n es a lshed has the right t o be r pr sent ed on that committ ee Int ernational

org nizations, g ove nmental an non-g ove nmental, in laison with ISO, also take part in the work

ISO cola orat es closely with the Int ernational Ele trot ech ical C mmis ion (IEC) on al matt ers of

ele trot ech ical s an ardization

The proc d r s used t o develo this document an those int en ed for it furthe maint enanc ar

desc ibed in the ISO/IEC Dir ctives, Part 1 In p rticular the dife ent a pro al c it eria ne ded for the

dife ent ty es of ISO document should be not ed This document was draft ed in ac ordanc with the

edit orial rules of the ISO/IEC Dir ctives, Part 2 ( e www iso org dir ctives)

A tt ention is drawn t o the p s ibi ity that some of the element of this document ma be the subje t of

p t ent right ISO shal not be held r sponsible for identifying any or al such p t ent right Detais of

any p t ent right identified d ring the develo ment of the document wi be in the Introd ction an / r

on the ISO ls of p t ent de larations r c ived ( e www iso org p t ent )

Any trade name used in this document is information given for the convenienc of use s an does not

cons itut e an en orsement

F or an ex lanation on the meaning of ISO spe ific t erms an ex r s ions r lat ed t o conformity

as es ment, as wel as information a out ISO’ s adhe enc t o the World Trade Org nization (WTO)

principles in the Te h ical Bar ie s t o Trade (TBT) se the folowing URL: ht p:// www iso org iso /

for word html

This document was pr p r d b Te h ical C mmitt ee ISO/TC 2 3, Dimens io al a d geometric al produc t

s pec ific atio s a d ve ific atio

A l s of al p rt in theISO 1 38 se ies can be foun on the ISO websit e

This document does not inclu e r q ir ment for set ing plug g ug es an set ing ring g ug es, w hich

we e dealt with in ISO/R 1 3 :1 7 , 3 9.4

This document covers the conc pt an principles develo ed in ISO 149 8

This document is a Geometrical Prod ct Spe ification (GPS) s an ard and is t o be r g rded as a g ene al

GPS s andard ( e ISO 146 8) It influenc s l n s F an G of the siz chain of s an ards in the g ene al

GPS matrix F or mor detaied information on the r lation of this document t o othe s an ards an the

GPS matrix model, se Annex B

The ISO/GPS Matrix model given in ISO 146 8 gives an o e view of the ISO/GPS sy st em of w hich this

document is a p rt The fun amental rules of ISO/GPS given in ISO 8 1 a ply t o this document an

the default de ision rules given in ISO 142 3-1 a ply t o spe if ications made in ac ordanc with this

document, u les othe wise in icat ed

The t erms an conc pt used in this document (comp r d t o ISO/R 1 3 :1 7 ) have be n chang ed

ac ording t o ne ds an t erminolo y in the othe GPS s an ards

This document deals with r fe enc disk g ug es The use of r fe enc disk g ug es is ex lained in

An ex A

NOTE T e content of Ta le 2uses the modif ier given in ISO 14 0 -1 an ISO 1 0

Geometrical product specifications (GPS) — Dimensional

Part 2:

This document spe if ies the mos imp rtant metrolo ical an design characte is ics of r fe enc

disk g uges

This document co e s l near siz s of the g ug e up t o 5 0 mm

2 Normati ve r eferences

The folowing document ar r fe r d t o in the t ext in such a wa that some or al of their cont ent

cons itut es r q ir ment of this document F or dat ed r fe enc s, only the edition cit ed a ples F or

un at ed r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment ) a ples

ISO 2 6-1, G eometric al produc t s pec ific ations (GPS) — ISO c ode sys tem fr tole a c es o lnear s i zes —

Part 1: B as i s o tole a c es, dev iatio s a d fit

ISO 1 0 , G eometric al produc t s pec ific atio s (GPS) — G eometric al tole a c in — Tole a c es o frm,

orientatio , loc atio a d run-o t

ISO 1 3 -1:2 1 , G eometric al produc t s pec ific atio s (GPS) — Dimens io al meas urin eq ipment — Part 1:

Plain lmit g u es o lnear s i ze

ISO 1440 -1, G eometric al produc t s pec ific atio s (GPS) — Dimens io al tole a c in — Part 1: Linear s i zes

ISO 1 45 - 2, G eometric al produc t s pec ific atio s (GPS) — G ene al c oncepts — Part 2 : B as ic tenets ,

s pec ific atio s , o e ators, u c ertainties a d ambig ities

ISO/IEC Guide 9 -3, Unc ertaint y o meas ur ment — Part 3 : Guide to the ex pr s s io o u c ertaint y in

meas ur ment (GUM: 19 9 5)

ISO/IEC Guide 9 , Inte n tion l v c ab lary o metrolo y — B as ic a d gene al c onc epts a d as soc iated

te ms (VIM)

3 Terms and definitions

F or the purp ses of this document, the t erms an definitions given in ISO 2 6-1, ISO 1 3 -1, ISO 14 0 -1,

ISO 1 45 - 2, ISO/IEC Guide 9 -3 an ISO/IEC Guide 9 an the folowing a ply

ISO an IEC maintain t erminolo ical data ases for use in s an ardization at the folowing ad r s es:

— IECEle tro edia: a aia le at ht p:/ www ele tro edia org

— ISO Onlne brow sing plat orm:a ai a le at ht p:/ www iso org o p

3.1

reference disk g ug e

ga ug e designed an int en ed t o det ermine the working siz of a g p ga ug e

unloaded size

US

< f a g p g ug e> pe pen icular dis anc betwe n the g uging fac s of a g p g ug e w hen the measuring

for e is z ro

3.3

wor king size

WS

< f a g p g ug e> diamet er of a disk o e w hich the g p g ug e jus p s es in a ve tical dir ction un e

the working lo d marked on it, or, if this is not in icat ed, un e it own weight

4 Symbols and abbr eviated terms

F r the purp ses of this document, the symb ls an a br viated te ms given in ISO 1 3 -1 an

Ta le 1 a ply

Table 1 — Symbols and ab reviated terms

Symb ls an

a br viat ed t erms

Desc iption

H

p

tolerance on the size characteristic, S, of a reference disk g ug

ref G -M reference disk g ug for a new state GO g p g ug

ref G -U reference disk g ug for a wear limits stat e G g p g ug

ref.NO GO reference disk g ug for a NO G g p g ug

US u lo ded size (of a g p g ug e)

W S working size (of a g p g ug )

5 Desig n characteristics

F or the purposes of this document, the design charact eris ics for ga ug es given in ISO 1 3 -1 a ply

R efe enc disk ga ug es can be made as ful form cy lindrical plug g ug es (ga ug e ty e A) or as segmental

cy lin rical bar g ug es (g ug e ty e B)

6 Metrolog ical characteristics

The mos imp rtant metrolo ical charact eris ics ar the siz S an the form charact eris ics of the

measuring featur of the r fe enc disk g ug e To define the metrolo ical charact eris ic on a r fe enc

disk g ug e, the modifie s def ined in ISO 1440 -1 an the symb ls def ined in ISO 1 0 shal be used

This document desc ibes p t ential metrolo ical charact eris icsa ai a le on r fe enc disk g ug es The

final de ision t o sele t one or seve al metrolo ical charact eris ics is lef t o the use

Ta le 2 gives p t ential metrolo ical charact eris ics for r fe enc disk g ug es, but also complementary

design charact eris ics as defined in Clause 5 Depen ing on the ne d of the use , a set of these

metrolo ical charact eris ics shal be defined;b defa ult, thetwo point siz , S, of the ga ug e l mit an the

form deviation ar r q ir d

Table 2 — List of design and metrological characteristic for reference disk g ug es

Desc iption

C mplementary

design

ch ract eris ics

Metrolo ical

ch ract eris ics

Ful form cy lin rical plug g uge — Gaug e ty e A

LG

S gmental cy lin rical b r g uge — Gaug e ty e B

LG

B

a

Default metrolo ical characteristic to b considered

Cy lin ricity (form)tolerance value (se ISO 1 0 )

Ma imum ins rib d (se ISO 14 0 -1)

Minimum cir ums rib d (se ISO 14 0 -1)

Two point size (se ISO 14 0 -1)

Common t olerance (se ISO 14 0 -1)

Combined zone (se ISO 1 0 )

7 Max imum per mis ible l mits on metr olog ical characteristics

The positions of t ole anc l mit for r fe enc disk g ug es in r lation t o workpie e t ole anc lmit ar

shown in Figur 1

1 r ef G -M

2 r ef G -U

3 r ef NO G

Figure 1 — MPL size positio for reference disk g ug es

The v lue for H

p ( e Figur 1) is spe if ic for r fe enc disk g ug es It is b sed on workpie e t ole anc

grade an workpie e featur siz an shal be taken from Ta le 3

Thev lue of z

1

, α

1

an y

1 ( e Figur 1) is spe if ic for each workpie et ole anc grade an siz an shal

be taken from ISO 1 3 -1:2 1 , Ta les 7 t o 1

The r q ir ment on the siz , S, of the g ug e element shal be in ac ordanc with the folowing g ug e

t ole anc s for new an wear l mit s at e ( e Figur 1)

a) F or a r fe enc disk g ug e for a new s at e GO g pga ug e:

1) for theup e spe ification lmit: USL

M, ref G -M

=USL

, ref G -M

= USL

W – z

1 + H

p / ;

2) for thelowe spe ification l mit: LSL

M, ref G -M

= LSL

, ref G -M

= USL

W – z

1 – H

p /

b) F or a r fe enc disk g ug e for a wear l mit s at e GO g pga ug e:

1) for theup e spe ification lmit: USL

M, ref G -U

= USL

, ref G -U

= USL

W + y

1 – α

1 + H

p / ;

2) for thelowe spe ification l mit: LSL

M, ref G -U

= LSL

, ref G -U

=USL

W + y

1 – α

1 – H

p /

c) F or a r fe enc disk g ug e for a NO GO g p g ug e:

1) for theup e spe ification lmit: USL

M, ref N G

=USL

, ref N G

= LSL

W + α

1 + H

p / ;

2) for thelowe spe ification l mit: LSL

M, ref N G

=LSL

, ref N G

= LSL

W + α

1 – H

p /

Table 3 — Values of H

p and F for calculatio of MPL of reference disk g ug es in standard

tolerance grades ac ording to ISO 28 ‑1

Workpie e s an ard t ole anc grades

Size

H

p

Form

2 × F

Size

H

p

Form

2× F

Size

H

p

Form

2 × F

The form lmit values are half the values given in c lumn 2 ×F

When the t ole anc of the dimension of a featur of siz of a workpie e is given as a code ac ording

t o ISO 2 6-1:2 1 , Ta le 3 an ISO 1 3 -1:2 1 , Ta les 7 t o 1 can be used dir ctly When the siz

t ole anc is not given as an ISO code, the s an ard t ole anc grade shal be def ined as the s an ard

t ole anc grade cor esp n ing t o the f irs t ole anc int erv l, T, given in ISO 1 38-1:2 1 , Ta les 7 t o 1 ,

lowe than or eq al t o the t ole anc int erv l of the workpie e in the same rang e of nominal siz s

When grades 6 t o 8 ar as ociat ed with the lett er N (6N, 7N or 8N), then for the GO g p g ug e an their

r fe enc disk ga ug es, the v lues y

1

an α

1

ar eq al t o z ro

Each r fe enc disk g ug e shal be legibly an pe manently marked with the folowing:

— siz t ole anc of theworkpie egiven b

— the workpie e t ole anc l mit ,

— b ISO code (nominal siz v lue of the workpie e with the symbol designating the t ole anc

clas ac ording t o ISO 28 -1), or

— b the nominal siz v lueof the workpie e, with the lowe an up e deviation of the workpie e,

or with only the suita le deviation (lowe or up e ) depending on the ga ug e ty e(r f GO-M, r f

GO-U or r f NO GO);

— thety e of r fe enc disk g ug e:

r f GO-M for a r fe enc disk g ug efor a new s at e GO g p g ug e;

r f GO-U for a r fe enc disk g ug efor a wear lmit s at e GO g p ga ug e;

r f NO GO for a r fe enc disk g ug efor a NO GO g p g ug e;

E AMP E 1 2 g6 ref G -M

E AMP E 2 1 ,1± ,1 ref GO-U

E AMP E 3 1 ,9 / 12,5 ref NO GO

— these ial n mbe (alphan me ical);

— theman factur r’ s name or trademark

The marking shal not be on g uging surfac s an shal not afe t the metrolo ical characte is ics of

the g ug es

Anne x A

( infor mati ve)

Mater ial measure ( referenc e) ofthe working size, WS, of a gap gauge

A 1 Interpretation of size

F or g p g ug es, H det ermines the l mit of the v lue of the working siz , WS, but not of the unlo ded

siz US The working siz of a g p g ug e, howeve , is not def ined with a z ro measuring for e, as for

othe g ug es, be ause in use, a g p ga ug e ma be r g rded as a comp rat or w hich efe t a trans e

measur ment between a k own dimension, e.g a r fe enc disk ga ug e an a workpie e

If g pga ug es ar ve if ied without a plying the s an ardiz d measuring for e, e.g b using a co rdinat e

measuring machine, then it is ne es ary t o k ow the elas ic defle tion of the g ug e b dy in orde that

the working siz can be calculat ed b the measur d u lo ded siz The measur d siz is the smales

dis anc of at leas five measur d lengths (four p sitions close t o the corne s an one at the c ntr of

the g uging fac s)

3 ref NO G

Figure A.1 — MPL size positio for g p g ug es and reference disk g ug es (example for the

wor kpiece dimensio 1 h7)

The r lationship betwe n the workpie e spe if ication an the MPL siz position for g p ga ug es an

r fe enc disk ga ug es is shown in Figur A.1 as ex mple for the workpie e dimension 1 h 7

NOTE T e relation b tween the t olerance H of the g p g ug an the t olerance H

p

of its reference disk g ug

is as folows

The diference b tween the limits of size given by H an by H

p represents a safety zone on b th sides of H

p

t o compensat e for er or of me surement H an H

p are therefore symmetrical (se Figure A.1) Therefore if,

ac ording t o the def inition of working size, g p g ug s lie outside the zone H

p but within the zone H, they are stil

t o b re arded as cor ect

A 2 Use ofreferenc e disk gaug es

The e ar two main methods w hich ma be used asa r fe enc of the working siz of g p g ug es

The two methodsar as folow s:

a) R efe enc disk g ug e method

F or a GO g p g ug e, two r fe enc disk g ug es ar used

The GO g p ga ug e should p s o e the r fe enc disk ga ug e for a new s at e GO g p g ug e (r f

GO-M) in a ve tical dir ction, u de the working lo d, aft er ha ing be n brought car fuly t o r s in

contact with ther fe enc disk g ug e an then r leased Ine tia for es ar th s a oided

The GO g p ga ug e should not p s o e the r fe enc disk ga ug e for a wear l mit s at e GO g p

g ug e (r f GO-U)w hen this is a pl ed in the same man e desc ibed a o e

The NO GO g p g ug e should p s o e the r fe enc disk ga ug e for a NO GO g p ga ug e (r f NO GO)

w hen this is a pled in the same manne desc ibed a o e

b) R efe enc disk g ug e an ga ug e block method

This method uses a r fe enc disk ga ug e with a diamet er smale than the working siz of the g p

g ug e, used in conju ction with g ug e blocks ac ording t o ISO 3 5 grade 1 an is a pro riat e t o

b th GO an NO GO g p g ug es The sum of the siz s of the g ug e block (s) an the r fe enc disk

g ug e shal me t the siz r q ir ment of the g ug e element of the cor esp n ing r fe enc disk

g ug e ac ording t o Clause 7

The GO g p ga ug e should p s o e the combined width of the g ug e block (s) an the r fe enc

disk g ug e cor esp n ing t o the r fe enc disk g ug e for a new s at e GO g p g ug e (r f GO-M) in

a ve tical dir ction, u de the working lo d, aft er ha ing be n brought car fuly t o r s in contact

with the g ug e block (s) an the r fe enc disk ga ug e an then r leased Ine tia for es ar th s

a oided

The GO g p ga ug e should not p s o e the combined width of theg ug e block (s) an the r fe enc

disk g ug e cor esp n ing t o the r fe enc disk g ug e for a wear l mit s at e GO g p ga ug e (r f

GO-U) w hen thisis a pled in the samemanne desc ibed a o e

The NO GO g p g ug e should p s o e the combined width of the g ug e block (s) an the r fe enc

disk ga ug e cor esp n ing t o the r fe enc disk ga ug e for a NO GO g p ga ug e (r f NO GO) w hen this

is a pled in the same man e desc ibed a o e

It is imp rtant that the g uging fac s of the g p ga ug e, the g ug e block (s) an r fe enc disk ga ug e

(depen ing on the method used) be car fuly wiped clean befor any measur ment ar pe formed F or

r fe enc disk g ug es, it is also r commen ed that they should be gr ased with a thin f ilm of paraffin

jely an then car fuly wiped, without complet ely r mo ing the p raff in jely