International Standard @ 7931 0 * 4 44gjb INTERNATlONAL ORGANlZATlON FOR STANOARDIZATION~MEKlYHAPOJlHAR OPTAHH3AUHR n0 CTAHllAPTH3ALlHH~RGANlSATlON INTEANATIONALE DE NORMALISATION Insulation caps and[.]
Trang 1INENAT lONAL OR ANlZ ATlO N FOR SANOARDIZ ATION~MElYA P OJlHAR O PTAHH3A UH n CAHlAPT3AL lH~R ANlSATlON INEA NAT IONAL E D NORMALISAT ION
Cap ch ns et bag e isolante p ur le matkriels p ur sodage par rtkistanc
Fir st e itio - 19 5-0 -01
De criptors :weldin , reista c weldin , weldin e uipme t, weldin acs orie, dime sio s, d sig atio , mark in
Trang 2IS0 (h Intern tion l Org niz tion for Sta d rdiz tion) is a w orldw id fe eration of
n tion l sta d rd b die (IS0 member b die ) Th w ork of preparin Inter nation l
Sta d r ds is normaly c rie out throu h IS0 te h ic l commite s Ea h member
b d inter este in a s bje t for w hic a te h ic l commite h s be n e tabls e h s
th rig t to be repre e te on th t commite Intern tion l org niz tion , gov rn-
me tal a d non-gov rnme tal, in laisonwith ISO, also tak e par in th w ork
Draf Intern tion l Sta d rd a o te by th te h ic l commite s ar e circ late to
th member b die for ap rov l before th ir a c pta c a Intern tion l Sta d rd by
th IS0 Cou ci Th y ar e ap rov d in a cor da c w ith IS0 proc d r es re uirin at
le st 7 % ap rov l by th member b die votin
Intern tion l Sta d rd IS0 7 31 was pr epare by T ec nic l Commite ISO/ T C 4 ,
Weldin an aled proc se
@ Internatio al Organiz tio for Stan ardiz tio , 19 9 0
Trang 3Insulation caps and bushes for resistance w elding
1 Sc p a d field of a plc tio
This Inter nation l Sta d rd spe ifie dime sion a d re-
q ireme ts for in ulate c ps a d bu h s in th s con ary
circ it for r esista c weldin e uipme t, e pe ialy for u e in
ba k -ups a cordin to IS0 5 2
2 Refere c s
IS0 67, Plain wa hers for metric b ls, s rews an n ts -
General plan
IS0 472, Hexag n socket he d c p srews - Pro uct
grade A
IS0 62, Sp t weldin - Ele tro e ba k-u s an clamps
3 Dime nsio s
3.1 In ulation c ps C
In ulation c ps C s al h v th dime sion s ow n in fig re 1
Dime sio s in mi mete,
srf ac ro g n s vlu in micromete
20
d
Fig re 1 - In ulation c p
3.1.1 Material
Th material fom whic th in ulation c ps are ma ufa tur ed
s al be hig -ste gth in ulatin mater ial, e.g gla s fibre re-
inforc d p ly mid
3.1.2 Finis
Th finis s al e s re th t th e g s ar e c amfer ed a d th
gro v s rou d d
3.1.3 Mark in
In ulation c ps to this Intern tion l Sta d rd s al be mar k ed
w ith th leter C
3.1.4 De ig ation
Th d sig ation for a in ulation c p C whic conforms to this
Intern tion l Sta d rd s al be a folows :
In ulation c p IS0 7 31 - C
3.2 In ulation bu h s B
In ulation bu h s B s al h v th dime sion giv n in fig re 2
a d th table
Dime sio in mi mete
I_
Fig re 2 - in ulation bu h
T able - Dime sion l)
Dime sio s in mi mete
8
1) W here th h le diameter is c n id ra ly larg r th n th diameter
d or slote h le are ue , a w aser is nc sary to s p or th b s
2) F r informatio o ly
Trang 43.2.1 Material
Th mater ial fom w hic th in ulation bu h s a d w as er s are
ma ufa tur ed s al be a f olow s :
- bu h : hig -ste gth in ulatin mater ial, e.g gla s fibre
reinforc d p ly amid ;
- w as er : ste l, e.g Fe 510
3.2.2 Finis
Th finis s al e s re th t th e g s are c amfere a d th
gro v s rou d d
3.2.3 Mark in
In ulation bu h s to this Inter nation l Sta d rd s al be mar k ed
w ith th leter B a d th siz , e.g B 10
3.2.4 De ig ation
Th d sig ation for a in ulation bu h B w hic conf orms to
this Inter nation l Sta d rd s al comp s th folow in items in
th ord r giv n :
a) th n me;
b) th refere c to this Intern tion l Sta d rd;
c) th leter B;
d) th siz
Ex mple of th d sig ation for a in ulation bu h B of siz 10 :
In ulation bu h IS0 7 31 - B 10
4 A pplc tio
In ulation bu h s conformin to this Intern tion l Sta d rd
s al only be loa e w ith th torq e mome t of th fixin
s r ew s
A ddition l forc s s al be tak en up by oth r me s r es (e.g pro-
v ision of s ould rs or simiar me n of s p or)
Fig re 3 - Typic l e ample of ap lc tion