EN ISO 18594:2007
(Main)Resistance spot-, projection- and seam-welding - Method for determining the transition resistance on aluminium and steel material (ISO 18594:2007)
Resistance spot-, projection- and seam-welding - Method for determining the transition resistance on aluminium and steel material (ISO 18594:2007)
ISO 18594:2007 specifies the procedure and the experimental set-up for determining the transition resistance of a single sheet or two overlapping sheets of aluminium or steel, with or without surface treatment, and with or without surface coating.
Widerstandspunkt-, Buckel- und Rollennahtschweißen - Verfahren für das Bestimmen des Übergangswiderstands von Aluminium- und Stahlwerkstoffen (ISO 18594:2007)
Diese Internationale Norm legt das Messverfahren und die Messeinrichtung zur Bestimmung des Übergangswiderstandes an Einzelblechen oder an zwei sich überlappenden Blechen aus Stahl- oder Aluminiumwerkstoffen mit oder ohne Oberflächenvorbehandlung sowie mit oder ohne Oberflächenveredelung fest.
Soudage par résistance par points, par bossage et à la molette - Méthode pour la détermination de la résistance de transition sur l'aluminium et sur l'acier (ISO 18594:2007)
L'ISO 18594:2007 spécifie le mode opératoire et le montage expérimental permettant de déterminer la résistance de transition d'une tôle ou de deux tôles minces en aluminium ou en acier avec ou sans traitement de surface et avec ou sans revêtement.
Točkovno, bradavičasto in kolutno uporovno varjenje – Metoda določanja prehodne upornosti na aluminiju in jeklu (ISO 18594:2007)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2007
7RþNRYQREUDGDYLþDVWRLQNROXWQRXSRURYQRYDUMHQMH±0HWRGDGRORþDQMD
SUHKRGQHXSRUQRVWLQDDOXPLQLMXLQMHNOX ,62
Resistance spot-, projection- and seam-welding - Method for determining the transition
resistance on aluminium and steel material (ISO 18594:2007)
Widerstandspunkt-, Buckel- und Rollennahtschweißen - Verfahren für das Bestimmen
des Übergangswiderstands von Aluminium- und Stahlwerkstoffen (ISO 18594:2007)
Soudage par résistance par points, par bossage et a la molette - Méthode pour la
détermination de la résistance de transition sur l'aluminium et sur l'acier (ISO
18594:2007)
Ta slovenski standard je istoveten z: EN ISO 18594:2007
ICS:
25.160.10 Varilni postopki in varjenje Welding processes
77.080.10 Železo Irons
77.120.10 Aluminij in aluminijeve zlitine Aluminium and aluminium
alloys
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 18594
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2007
ICS 25.160.10
English Version
Resistance spot-, projection- and seam-welding - Method for
determining the transition resistance on aluminium and steel
material (ISO 18594:2007)
Soudage par résistance par points, par bossage et à la Widerstandspunkt-, Buckel- und Rollennahtschweißen -
molette - Méthode pour la détermination de la résistance de Verfahren für das Bestimmen des Übergangswiderstands
transition sur l'aluminium et sur l'acier (ISO 18594:2007) von Aluminium- und Stahlwerkstoffen (ISO 18594:2007)
This European Standard was approved by CEN on 17 February 2007.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
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Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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EUROPÄISCHES KOMITEE FÜR NORMUNG
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© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18594:2007: E
worldwide for CEN national Members.
Foreword
This document (EN ISO 18594:2007) has been prepared by Technical Committee ISO/TC 44
"Welding and allied processes" in collaboration with Technical Committee CEN/TC 121
"Welding", the secretariat of which is held by DIN.
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 September 2007, and conflicting national
standards shall be withdrawn at the latest by September 2007.
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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United
Kingdom.
Endorsement notice
The text of ISO 18594:2007 has been approved by CEN as EN ISO 18594:2007 without any
modifications.
INTERNATIONAL ISO
STANDARD 18594
First edition
2007-03-01
Resistance spot-, projection- and seam-
welding — Method for determining the
transition resistance on aluminium and
steel material
Soudage par résistance par points, par bossages et à la molette —
Méthode pour la détermination de la résistance de transition sur
l'aluminium et sur l'acier
Reference number
ISO 18594:2007(E)
©
ISO 2007
ISO 18594:2007(E)
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ii © ISO 2007 – All rights reserved
ISO 18594:2007(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Terms and definitions. 1
3 Basic principles . 2
4 Measurement. 2
4.1 Measuring set-up . 2
4.2 Measurement procedure . 5
5 Test equipment . 6
6 Formulae and abbreviations for calculating the transition resistance . 7
7 Test report . 8
Annex A (informative) Test report .9
Bibliography . 11
ISO 18594:2007(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 18594 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 6, Resistance welding.
Requests for official interpretations of any aspect of this International Standard should be directed to the
Secretariat of ISO/TC 44/SC 6 via your national standards body. A complete listing of these bodies can be
found at www.iso.org.
iv © ISO 2007 – All rights reserved
INTERNATIONAL STANDARD ISO 18594:2007(E)
Resistance spot-, projection- and seam-welding — Method for
determining the transition resistance on aluminium and steel
material
1 Scope
This International Standard specifies the procedure and the experimental set-up for determining the transition
resistance of a single sheet or two overlapping sheets of aluminium or steel, with or without surface treatment,
and with or without surface coating.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
contact resistance
electric property of a contact area between two bodies which opposes and limits the passage through it of a
steady current
EXAMPLE The contacts between electrode/electrode, electrode/sheet and sheet/sheet.
2.2
bulk resistance
ohmic resistance of an electrical conductor
2.3
total resistance
R
electrical resistance as measured between the sensing clamps (includes both bulk and contact resistances)
See Figure 1 and Figure 2.
2.4
set-up resistance
R
s
resistance of the experimental set-up between the sensing clamps without metal sheet(s) between the
electrodes, the two electrodes being in direct contact
See Figure 2 b), (R +R +R ).
0 1 7
2.5
transition resistance
R
t
total resistance minus the set-up resistance
ISO 18594:2007(E)
3 Basic principles
Figure 1 shows schematically the resistances in the weld zone of the spot welding process. The contact
resistances are not directly accessible to measurement.
Key
F electrode force
E
1 bulk resistance of top electrode, R
2 contact resistance top electrode/upper sheet, R
3 bulk resistance of upper sheet, R
4 contact resistance sheet/sheet, R
5 bulk resistance of lower sheet, R
6 contact resistance lower sheet/bottom electrode, R
7 bulk resistance of bottom electrode, R
Figure 1 — Resistance (schematic illustration)
4 Measurement
4.1 Measuring set-up
Figure 2 a) shows schematically the experimental set-up for the determination of the transition resistance with
one metal sheet between the electrodes. The total resistance is measured by means of the voltage/potential
drop between the two sensing clamps.
Either one or two specimens are placed between the electrodes, the electrode force is applied and a rectified
current from an external source is allowed to flow through the test pieces via the electrodes. The voltage drop
between the sensing clamps is measured and the total resistance calculated using Ohm’s law:
U
R= (1)
I
2 © ISO 2007 – All rights reserved
ISO 18594:2007(E)
where
R is the total resistance, in ohms;
U is the voltage, in volts;
I is the current, in amperes.
The resistance of the experimental set-up, or set-up resistance, is obtained by measuring the voltage drop
between the sensing clamps without any test pieces between the electrodes [see Figure 2 b)]. The set-up
resistance comprises the bulk resistance of the electrodes between the sensing clamps and the contact
resistance between the electrodes.
In the case of single metal sheet measurements, the total resistance consists of the bulk resistances of the top
and bottom electrodes between the sensing clamps (R , R ), the contact resistances (R , R ) and the bulk
1 7 2 6
resistance of the sheet (R ) [see Figure 2 c)].
The total resistance, in the case of two-sheet measurements, consists of the bulk resistances of the top and
bottom electrodes between the sensing clamps (R , R ), the contact resistances (R , R , R ) and bulk
1 7 2 4 6
resistances of the two-sheets (R , R ) [see Figure 2 d)].
3 5
ISO 18594:2007(E)
Key
1 electrode 4 d.c. current source
2 sheet F electrode force
E
3 voltmeter I current
a) Set-up for determining the transition resistance
Key Key Key
F electrode force F electrode force F electrode force
E E E
I current I current I current
R contact resistance R ; R ; R; bulk resistance R ; R ; R ; R bulk resistance
0 1 3 7 1 3 5 7
R ; R bulk resistance R ; R contact resistance R ; R ; R contact resistance
1 7 2 6 2 4 6
b) Measurement of the set-up c) Single-sheet measurement d) Two-sheet measurement
resistance
Figure 2 — Experimental set-up for determining the transition resistance
4 © ISO 2007 – All rights reserved
ISO 18594:2007(E)
4.2 Measurement procedure
4.2.1 Prepar
...
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