Tiêu chuẩn iso 06123 2 2015

© ISO 2015 Rubber or plastics covered rollers — Specifications — Part 2 Surface characteristics Cylindres revêtus de caoutchouc ou de plastique — Spécifications — Partie 2 Caractéristiques de surface[.]

Rubber or plastics covered rol ers —

Part 2:

Cylindre s r vê tus de ca utch uc o de plastique — S écifications —

Partie 2: Caractéristique s de surf c

T ir d edition

2 1 -1 -0

Reference n mb r

ISO 61 3-2:2 1 (E)

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F r eword i v

Introduction v

1 Sc ope 1

2  Nor mati ve ferenc es 1

3  Terms and definitions 1

4 Surfac e q alty 2

4.1 General 2

4.2 Grades 2

5  Surfac e finish 3

5.1 Methodsof surfac tr eatment — Te ms and clas ification 3

5.2 Desc iption b surfac tr eatment — T ypes 3

5.2.1 T ype 1— Polshed finish 3

5.2.2 T ype 2— Fine g rin ing finish 3

5.2.3 T ype 3— Stan ar d g rin ing finish 3

5.2.4 T ype 4 — T urned finish 3

5.2.5 T ype 5— Ung r ou d finish 4

5.2.6 T ype S— Spe ial tr eatment 4

5.3 Characte ization b surfac r oughnes 4

5.3.1 Req ir ement 4

5.3.2 Method of testing 4

5.3.3 Ex pr es ion of results 6

5.3.4 Repeatabi ty an r epr od cibi ty 6

A nne x  A  (informative) Relatio  betwe n surfac e treatment and sur fac e ughnes 7

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

b dies (ISO membe b dies) The work of pr paring Int ernational Stan ards is normal y 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 p rt 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 sp nsible 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 if ic t erms and 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 WTO principles in the Te h ical

Bar ie s t o Trade (TBT) se the folowing URL: F or word - Sup lementary information

The committ ee r sp nsible for this document is ISO/TC 45, R ub e a d rub e produc ts , Subcommitt ee

SC 4, Produc ts (othe th n h ses)

This third edition canc ls an r plac s the se ond edition (ISO 6 12 - 2:1 88), of w hich it cons itut es a

minor r vision t o updat e thenormative r fe enc s

ISO 6 12 consis s of the fol owing part , u de the g ene al title R ub e or plas tic s c ove ed role s —

S ec ific atio s:

— Part 1: R eq ir ments fr h rdnes s

— Part 2 : S rfc e charac te i s tic s

— Part 3 : Dimens io al tole a c es

C ve ed role s ar cylin rical cor s, gene aly of metal, with a co e of rub e or plas ics or a p rticular

use They ar man ufa ctur d in a wide v ariety of siz s an hard es grades depen ing on the inten ed use

Rubber or plastics covered  l ers   Specifications 

Part 2:

This p rt of ISO 6 12 es a lshes a clas ification of rub e or plas ics co e ed role s ac ording t o

surfac q alty or impe fe tions an surfac f inish A t es method for the det ermination of surfac

rough es is also desc ibed

2 Normati ve references

The folowing document , in w hole or in p rt, ar normatively r fe enc d in this document an ar

in ispensa le for it a pl cation 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 3 74, G eometric al Produc t S ec ific atio s (GPS) — S rfc e tex ture : Profie meth d — Nomin l

charac te i s tic s o c ontac t (s t ylus) ins truments

ISO 42 8, G eometric al Produc t S ec ific atio s (GPS) — S rfc e tex ture : Profie meth d — Rules a d

proc edur s fr the as s es s ment o s urfc e tex tur

ISO 2 5 9, R ub e r — G e ne ral procedur s fr pre parin a d conditio in tes t pieces fr p ys ical tes t meth ds

3 Terms and definitions

F or the purposes of this document, the fol owing t erms and def initions a ply

3.1

arithmetical me n deviation of the profi e

R

a

arithmetical mean of the a solut e v lues of the profile dep rtur s within the sampl ng length, l

R

l

l

a

d

=

∫ 1

0

or a pro imat ely R

n y

i

i n

a

≈

=

∑ 1

1

w he e n is the n mbe of disc et e profile deviations

Not e 1 t o entry: The values of R

a

in practice are determined within the evaluation length which inclu es several

sampling lengths A ccording to ISO 3 74, the sampling length is eq al to the cut-of

3.2

ten point height of ir e ularities

R

z

a e ag e v lue of the a solut e v lues of the height of f ive highes profile peaks and the depths of f ive

de pes prof ile v ley s within the sampl ng length

R

z

i i

=

+

=

=

∑

∑

1 5

1 5

5

w he e

y

pi

is the height of the ith highes peak prof ile;

y

vi

is the depth of theith de pes profile v ley

Not e 1to entry: Depen ing on the shape of the prof ile, in certain cases,a pro lem arises as ociated with the lack

of a n mb r of prof ile pe ks an valeys an / r the su er -imposing of wavines on the rough es

4 Surfac e qual ty

4.1 General

The man facturing proc s an the raw mat erials used in the man factur of rub e or plas ics

co e ed role s ma ca use sp radic impe fe tions, in the form of holes an for ign matt er, in the surfac

of the role covers The n mbe , siz an location of pe mis ible surfac impe fe tions shal be a r ed

betwe n the int er st ed parties

The ty e of surfac finish ( e Cla use 5) shal be o se ved w hen sele ting the grade of impe fe tions

The role s ma be graded ac ording t o the pe mis ible n mbe s an siz s of impe fe tions as folow s:

Grade x/y

This means that

— impe fe tions up t o an inclu ing x mm

2

in ar a ar ac epta le;

— not mor than two impe fe tions each ha ing an ar a betwe n x mm

2

an y mm

2

inclusive ar

pe mis ible in any 0,1 m

2

of co e ar a;

— role co e s showing impe fe tions larg er than y mm

2

in ar a shal be r je t ed

Thev lues of x an y shal be a r ed betwe n the int er st ed p rties

If no r q ir ment for surfac q alty ar ne es ary, the role sshal be designat ed “grade N”

EXAMPLE A medium grade of surfac q alty can be desc ibed b the designation:

Grade 0,5 2

This means that

— impe fe tions up t o an inclu ing 0,5 mm

2

in ar a ar ac epta le;

— not mor than two impe fe tions each ha ing an ar a be twe n 0,5 mm

2

an 2 mm

2

inclusive ar

pe mis ible in any 0,1 m

2

of co e ar a;

— role co e s showing impe fe tions larg er than 2 mm

2

in ar a shal be r je t ed

If a r ement betwe n the int er st ed parties, or spe ial pro isions in national s an ard, ar int ended,

the r q ir d q alty should be chosen from the grades given below:

— grade 0,1/ 0,3

— grade 0,3/ 1

— grade 0,5 2

— grade 2 5

— grade 5/ 10

— grade N

5 Surfac e finish

The surfac f inish of a role co e is dictat ed b the int en ed use It shal be charact eriz d eithe as a

ty e of surfac tr atment ( e 5.1) or as the ma imum v lue of surfac rough es ( e 5.3), as a r ed

betwe n the int er st ed parties

5.1 Methods of surface tr eatment  Terms and clas ification

Ta le 1 shows the g ene aly emplo ed princip l methods of surfac tr atment, b means of w hich the

role surfac s ar clas if ied ( e 5.2) The ty e of surfac f inish, an the s ructur or t extur w hich can

be achieved, ar depen ent up n the hard es an comp sition of the role co e

Table 1  Surface finishes

1

2

3

4

5

Polishing

Grin ing, f ine

Grin ing,stan ard

T rning

Ungrou d f inish

↑

↑

↑

↑

↑

5.2 Des ription by surfac e treatment  T ypes

The surfac s ructur s desc ibed for Ty es 1 t o 4 ar prod c d b r gular tr atment an ha e a

rough es without pr fe ential dir ction

The ty e r q ir d shal be chosen b a r ement betwe n the int er st ed p rties

5.2.1 T ype 1  Pol shed finish

In sof elast ome s, the surfac is velvet-lke; in hard rub e (eb nit e) or plas ics, it is smo th

Grin ing marks and sc at ches shal not be visible t o the naked eye Sporadic grinding blemishes ar

pe mis ible Not al q alties pe mit his f inish

5.2.2 T ype 2  Fine g r inding  finish

Slght grin ing an fe d marks ar visible t o the naked eye, but ar not notic a le w hen t ouching the

role

5.2.3 T ype 3  Standard inding  finish

Grin ing marks an grin ing fe d ar visible an jus notic a le w hen t ouching the role

5.2.4 T ype 4  T ur ned finish

The surfac is solely turned, with as lt le fe d of the turning t ool as practica le T rning gro ves ar

visible an notic a le w hen t ouching the role

5.2.5 T ype 5  Ung roun  finish

The surfac of the role is without any tr atment or dr s ing, for ex mple a cloth-marked role surfac

as it comes from the vulcanization proc s or a rough-cas plas ics-co e ed role

5.2.6 T ype S  Special treatment

This a ples t o surfac finishes othe than those in 5.2.1 t o 5.2.5, for ex mple a f ine-cas plas

ics-co e ed role , or t o a finish for spe ific a plcations with a spe ial s ructur as def ined b a r ement

betwe n the int er st ed parties

5.3 Character ization by surfac e ug hnes

5.3.1 Requirement

The surfac finish of rub e or plas ics co e ed role s shal be q antitatively ex r s ed in one of the

folowing u it , as a r ed betwe n the int er st ed p rties:

a) arithmetical mean deviation of the profile R

a ( e 3.1), in mic omet ers;

b) t en p int height of ir egularities R

z ( e 3.2), in mic omet ers

Theroughnes of the co e surfac shal a pear visual y u iform

5.3.2 Method of testing

5.3.2.1 Test instr ument: Profie meter

a) General

Thedet ermination of surfac rough es shal be car ied out b using a contact profile met er, sy st em M,

as spe if ied in ISO 3 74 Unles spe if ied below, the b sic paramet ers an metrolo ical charact eris ics

of the ins rument shal be those spe if ied in ISO 3 74

Theins rument shal be eq ip ed with a suita le sup ort for use on curved surfac s

The contact s y lus shal be calbrat ed at the in icat ed measur ment v lues, for ex mple b use of a

r fe enc surfac of k own roughnes

b) Sty lus

Sty lus angle: 1,5 rad ( 90°

Radius of s y lus tip:5μm ma

Static measuring for e at mean level of s y lus: 4 mN ma

c) S mplng  length, evaluatio  length an  cut-of

The sampl ng length l an the ev luation length l

n shal be as spe if ied in ISO 42 8

NOTE For rub er·or plastic covered rol er , the folowing values of cut-of λ sampling length l an

evaluation length l

n are encou tered in practice

Table 2  Parameter  for specified R

a

R

a

μm

λ

mm

l

mm

l

n

mm

> 0,1 u to 2

> 2u to 1

0,8

2,5

0,8

2,5

4,0

1 ,5

Table 3  Parameter for  specified R

z

R

z

μm

λ

mm

l

mm

l

n

mm

> 0,5u to 1

> 1 u t o 5

0,8

2,5

0,8

2,5

4,0

1 ,5

5.3.2.2 Test nditio s

a) Temperature

The t es shal be car ied out, w heneve p s ible, at a s an ard t empe atur (2 °C± 2 °Cor 2 °C ± 2 °C)

in ac ordanc with ISO 2 5 9 The co e ed role shal be brought t o the t es t empe atur prior t o

t es ing t o ensur t empe atur eq i ibrium

The t es t empe atur shal be r corded

b) Co er surface

Befor measur ment ar made, the co e surfac shal be cleaned car fuly t o r mo e d s an othe

contaminant w hich ha e cole t ed d ring st orag e The cleaning shal not damag e the surfac

NOTE Wiping the surface with isopropy l alcohol has b en fou d suita le

5.3.2.3 Test pr oc ed r e

a) Me suring  are s

F or rol e s ha ing a co e up t o 2,5 m long, the rough es shal be measur d in f ive ar as:

— thr e ar as, each 1 0° a art, arou d the cir umfe enc in the mid le of the role ;

— one ar a at each en , at a dis anc of 1 % of the co e length from the en

F or rol e s ha ing a co e o e 2,5 m long, the roughnes shal be measur d in nine ar as:

— thr e ar as, each 1 0° a art, arou d the cir umfe enc in the mid le of the role ;

— thr e ar as at each en , each 1 0° a art, arou d the cir umfe enc , an each at a dis anc of 1 %

of the co e length from the en

b) Operatio

Firmly locate the rol e to be t est ed with it longitudinal a is horizontal an with the ar a in which

the surfac roughnes is t o be measur d up e mos Plac the measuring eq ipment on the role an

adjus the pick-up so that the cor e t s atic measuring for e at the mean level of the s ylus is ex erted

on the surfac

Make one measur ment in each measuring ar a with the s y lus traverse lne p ralel t o the a is of the

role

The sampl ng length for each measur ment shal be the ev luation length plus the pr -measuring an

the p s -measuring lengths

5.3.3 Ex pres io  of sults

F or each measuring ar a spe if ied in 5.3.2.3a), the arithmetical mean deviation of the prof ile R

a , or the

1 point height of ir egularities, R

z , r spe tively shal be measur d as defined in ISO 42 8

The rough es of the role co e surfac shal be r p rt ed as the a e ag e of al r adings taken as

spe ified in 5.3.2.3a)

5.3.4 Repe tabiity and producibiity

The dife enc betwe n two single t es r sult o tained on identical t es mat erial un e the

r peata i ty conditions spe if ied for a particular det ermination wi l ex ce d 2 % on a e ag e not mor

than onc in 2 cases in the normal an cor e t o e ation of the method

The dife enc betwe n two single an in epen ent tes r sult o tained b two o e ators wor king u de

the spe ified r prod cibi ty con it ions in dife ent la oratories on identical t es material wi exce d

5 % on a e age not mor than onc in 2 cases in the normal an cor e t o e ation of the method