SIST EN ISO 14373:2007
(Main)Resistance welding - Procedure for spot welding of uncoated and coated low carbon steels (ISO 14373:2006)
Resistance welding - Procedure for spot welding of uncoated and coated low carbon steels (ISO 14373:2006)
This standard specifies requirements for resistance spot welding in the fabrication of assemblies of uncoated and metallic coated low carbon steel comprising two or three sheets of metal, where the maximum single sheet thickness of components to be welded is within the range 0,4 mm to 3 mm for the following materials;uncoated steels;hot dip zinc or iron-zinc alloy (galvannealed) coated steel;electrolytic zinc, zinc-iron, or zinc-nickel coated steel;aluminium coated steel;zinc-aluminium coated steel. This International Standard is applicable to the welding of sheets of the same or dissimilar thickness where the thickness ratio is less than or equal to 3:1. It applies to the welding of three thicknesses where the total thickness is less than or equal to 9 mm. Welding with the following types of equipment is within the scope of this standard:pedestal welding equipment;gun welders;automatic welding equipment where the components are fed by robots or automatic feeding equipment;multi welders;robotic welders. Information on appropriate welding equipment is given in Annex A and on spot welding conditions in Annex B. The latter are for guidance only and may require modification depending on service conditions of the fabrication, type of welding equipment, characteristics of the secondary circuit, electrode material, and shape. These requirements may be obtained from the relevant application standard, where one exists. The welding of organic coated or primer coated steels is not within the scope of this standard.
Widerstandsschweißen - Verfahren zum Punktschweißen von niedriglegierten Stählen mit oder ohne metallischem Überzug (ISO 14373:2006)
Diese Internationale Norm legt Anforderungen für das Widerstandspunktschweißen an Bauteilen aus niedriglegiertem Stahl mit oder ohne metallischem Überzug fest. Die Bauteile können aus zwei oder drei verschiedenen Blechdicken, jeweils zwischen 0,4 mm und 3 mm, aus den folgenden Werkstoffen mit unterschiedlicher Oberflächenveredelung bestehen:
Stahl ohne Überzug;
Stahl mit Feuerverzinkung oder Fe Zn Legierung (galvannealed);
Stahl mit elektrolytisch aufgebrachtem Zn oder Zn Ni Überzug;
Stahl mit Aluminiumüberzug;
Stahl mit Zn Al Legierungsüberzug.
Diese Internationale Norm gilt für das Schweißen von Blechen oder Platten gleicher oder unterschiedlicher Dicke mit einem Dickenverhältnis von nicht mehr als 3 : 1. Sie gilt auch für die Dreiblechschweißung bis zu einer Gesamtdicke von 9 mm.
Die folgenden Schweißeinrichtungen werden von dieser Norm erfasst:
a) Ständerschweißmaschinen;
b) Punktschweißzangen;
c) automatische Schweißeinrichtungen, bei denen die Bauteile durch Roboter oder automatische Zuführungen zugeführt werden;
d) Vielpunktschweißanlagen;
e) Roboterschweißanlagen.
Anhang A enthält Angaben über geeig¬nete Schweißeinrichtungen, Anhang B informiert über die Punktschweißbedingungen. Diese Informationen dienen jedoch nur als Anhalt. Je nach den Fertigungs¬bedingungen, der Schweißeinrichtung, den Eigenschaften des Sekundärkreises, Elektrodenwerkstoff und Elektrodengeometrie sind ggf. Anpassungen erforderlich. Falls eine entsprechende Anwendungs¬norm hierzu existiert, können weiterführende Informationen daraus entnommen werden.
Das Schweißen von organisch oder mit Primern beschichteten Stählen liegt nicht im Anwendungsbereich dieser Internationalen Norm.
Soudage par résistance - Mode opératoire pour le soudage par points des aciers a bas carbone revetus et non revetus (ISO 14373:2006)
L'ISO 14373:2006 spécifie les exigences relatives au soudage par résistance par points pour la fabrication d'assemblages en acier à bas carbone revêtu ou non revêtu avec deux ou trois épaisseurs de métal, l'épaisseur maximale d'une tôle simple constituant les pièces à souder étant comprise entre 0,4 mm et 3 mm pour les matériaux suivants:
aciers non revêtus;
acier galvanisé à chaud ou revêtu d'un alliage de fer-zinc (recuit par galvanisation);
acier avec revêtement électrolytique de zinc, zinc-fer ou zinc-nickel;
acier revêtu d'aluminium;
acier revêtu de zinc-aluminium.
L'ISO 14373:2006 s'applique au soudage de tôles présentant une épaisseur similaire ou différente, et dont le rapport entre les épaisseurs est inférieur ou égal à 3:1. Elle s'applique au soudage de trois épaisseurs, dont l'épaisseur totale est inférieure ou égale à 9 mm.
L'ISO 14373:2006 concerne le soudage réalisé avec les types de matériels suivants:
machine de soudage avec commande au pied;
machines à souder mobiles (au pistolet);
matériel de soudage automatique avec lequel les composants sont mis en place par des robots ou des appareils d'alimentation automatique;
machines à souder multipoints;
robots de soudage.
L'ISO 14373:2006 ne couvre pas le soudage d'aciers revêtus de produit organique ou d'apprêt (primaire).
Uporovno varjenje - Postopek točkovnega varjenja neprevlečenih in prevlečenih maloogljičnih jekel (ISO 14373:2006)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 14373:2007
01-september-2007
8SRURYQRYDUMHQMH3RVWRSHNWRþNRYQHJDYDUMHQMDQHSUHYOHþHQLKLQSUHYOHþHQLK
PDORRJOMLþQLKMHNHO ,62
Resistance welding - Procedure for spot welding of uncoated and coated low carbon
steels (ISO 14373:2006)
Widerstandsschweißen - Verfahren zum Punktschweißen von niedriglegierten Stählen
mit oder ohne metallischem Überzug (ISO 14373:2006)
Soudage par résistance - Mode opératoire pour le soudage par points des aciers a bas
carbone revetus et non revetus (ISO 14373:2006)
Ta slovenski standard je istoveten z: EN ISO 14373:2007
ICS:
25.160.10 Varilni postopki in varjenje Welding processes
SIST EN ISO 14373:2007 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN ISO 14373
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2007
ICS 25.160.10
English Version
Resistance welding - Procedure for spot welding of uncoated
and coated low carbon steels (ISO 14373:2006)
Soudage par résistance - Mode opératoire pour le soudage Widerstandsschweißen - Verfahren zum Punktschweißen
par points des aciers à bas carbone revêtus et non revêtus von niedriglegierten Stählen mit oder ohne metallischem
(ISO 14373:2006) Überzug (ISO 14373:2006)
This European Standard was approved by CEN on 19 May 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,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14373:2007: E
worldwide for CEN national Members.
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EN ISO 14373:2007 (E)
Foreword
The text of ISO 14373:2006 has been prepared by IIW, International Institute of Welding, and has been taken
over as EN ISO 14373:2007 by 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 December 2007, and conflicting national standards shall be withdrawn
at the latest by December 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 14373:2006 has been approved by CEN as a EN ISO 14373:2007 without any modification.
2
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INTERNATIONAL ISO
STANDARD 14373
First edition
2006-08-15
Resistance welding — Procedure for spot
welding of uncoated and coated low
carbon steels
Soudage par résistance — Mode opératoire pour le soudage par points
des aciers à bas carbone revêtus et non revêtus
Reference number
ISO 14373:2006(E)
©
ISO 2006
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ISO 14373:2006(E)
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ii © ISO 2006 – All rights reserved
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ISO 14373:2006(E)
Contents Page
Foreword. iv
1 Scope .1
2 Normative references .2
3 Terms and definitions .2
4 Symbols and abbreviated terms .4
5 Material .4
5.1 Form .4
5.2 Steel grades.4
6 Surface conditions.5
7 Edge conditions, form of component, and weld spacing.5
8 Electrodes.5
8.1 Materials .5
8.2 Dimensions.5
8.3 Cooling of electrodes .7
9 Weld assessment.8
9.1 General.8
9.2 Weldability tests.8
9.3 Production tests.8
9.4 Frequency of testing .8
10 Weld quality requirements.9
10.1 Weld diameter .9
10.2 Weld penetration and indentation.9
10.3 Weld fracture mode .9
10.4 Weld shear strength .9
10.5 Weld appearance .10
11 Multi-weld arrays.10
Annex A (informative) Recommendations for spot welding equipment.12
Annex B (informative) Typical spot welding conditions .13
Annex C (informative) Partial list of steel types applicable to this International Standard.15
Bibliography .16
© ISO 2006 – All rights reserved iii
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ISO 14373:2006(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 14373 was prepared by the International Institute of Welding, recognized as an international
standardizing body in the field of welding in accordance with Council Resolution 42/1999.
Requests for official interpretations of any aspect of this International Standard should be directed to the
ISO Central Secretariat, who will forward them to the IIW Secretariat for an official response.
iv © ISO 2006 – All rights reserved
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INTERNATIONAL STANDARD ISO 14373:2006(E)
Resistance welding — Procedure for spot welding of uncoated
and coated low carbon steels
1 Scope
This International Standard specifies requirements for resistance spot welding in the fabrication of assemblies
of uncoated and metallic coated low carbon steel, comprising two or three sheets of metal, where the
maximum single sheet thickness of components to be welded is within the range 0,4 mm to 3 mm, for the
following materials:
⎯ uncoated steels;
⎯ hot-dip zinc or iron-zinc alloy (galvannealed) coated steel;
⎯ electrolytic zinc, zinc-iron, or zinc-nickel coated steel;
⎯ aluminium coated steel;
⎯ zinc-aluminium coated steel.
This International Standard is applicable to the welding of sheets of the same or dissimilar thickness, where
the thickness ratio is less than or equal to 3:1. It applies to the welding of three thicknesses, where the total
thickness is less than or equal to 9 mm.
Welding with the following types of equipment is within the scope of this International Standard:
a) pedestal welding equipment;
b) gun welders;
c) automatic welding equipment where the components are fed by robots or automatic feeding equipment;
d) multi welders;
e) robotic welders.
Information on appropriate welding equipment is given in Annex A, and information on spot welding conditions
is given in Annex B. This information is provided for guidance only. Depending on the service conditions of the
fabrication, the type of welding equipment, the characteristics of the secondary circuit, the electrode material,
and the shape, it is possible that certain modifications are necessary. In such cases, further information may
be obtained from the relevant application standard, where one exists.
The welding of organic coated or primer coated steels is not within the scope of this International Standard.
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ISO 14373:2006(E)
2 Normative references
The following referenced documents are indispensable for the application 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 669, Resistance welding — Resistance welding equipment — Mechanical and electrical requirements
ISO 5182, Welding — Materials for resistance welding electrodes and ancillary equipment
ISO 10447, Welding — Peel and chisel testing of resistance spot, projection and seam welds
ISO 14270, Specimen dimensions and procedure for mechanized peel testing resistance spot, seam and
embossed projection welds
ISO 14329, Resistance welding — Destructive tests of welds — Failure types and geometric measurements
for resistance spot, seam and projection welds
ISO 15609-5, Specification and qualification of welding procedures for metallic materials — Welding
procedure specification — Part 5: Resistance welding
ISO 15614-12, Specification and qualification of welding procedures for metallic materials — Welding
procedure test — Part 12: Spot, seam and projection welding
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 669, ISO 14329, and the following
apply.
3.1
corona bond zone
area of the weld at the faying surfaces in which solid phase bonding has occurred
See Figure 2.
3.2
cross-tension test
test to determine the load-carrying capability of a spot welded joint subjected to cross tension loading
3.3
shear test
tensile shear test
test to determine the load-carrying capability of a spot welded joint subjected to shear tension loading
3.4
weld nugget
lenticular zone in a resistance weld, where metal from both (all) sheets has melted and re-solidified
3.5
weld pitch
centre-to-centre distance between adjacent spot welds
2 © ISO 2006 – All rights reserved
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ISO 14373:2006(E)
a
a) Symmetrical
a
b) Asymmetrical
b
c) Partial
Key
1 interfacial fracture
a
d = d = (d + d )/2.
p 1 2
b
d = (d + d )/2 and d = (d + d )/2.
1 2 p 2 3
Figure 1 — Measuring of weld size for weld with plug (slug) failure
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ISO 14373:2006(E)
Key
a
1 sheared nugget Diameter of the corona.
b
2 corona bond zone Diameter of the nugget.
c
3 nugget d or d .
1 2
4 rough fracture zone
Figure 2 — Measuring of weld size for weld with interface failure, d < d
c
4 Symbols and abbreviated terms
Symbol Term Dimension
d weld diameter (see Figures 1 and 2) mm
d corona diameter mm
c
d electrode tip diameter mm
e
d nugget diameter mm
n
t sheet thickness mm
P weld shear strength kN
s
R ultimate tensile strength of steel being welded MPa
m
5 Material
5.1 Form
The steel shall be flat rolled, in coil or cut to length, and shall be free from harmful imperfections.
5.2 Steel grades
A partial list of steel grades to which this International Standard is applicable is given in Annex C.
4 © ISO 2006 – All rights reserved
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ISO 14373:2006(E)
6 Surface conditions
Prior to welding, all surfaces of components to be spot-welded shall be free from grease, scale, rust, paint,
1)
dirt, or excessive pitting. Uncoated hot rolled steel shall be in the pickled condition . Coated steels can be
supplied with a chromate or phosphate passivation treatment. Phosphated mild steel may be used in certain
applications. These materials can be spot welded, although adjustment may be required to the welding
parameters outlined in Annex B. Generally speaking, only thin phosphate pre-treatment of steel is acceptable
prior to spot welding.
7 Edge conditions, form of component, and weld spacing
The components to be welded shall be free from any burrs or other defects which may interfere with interface
contact in some way, or which may necessitate excessive force in fitting the parts together.
The shape of the component should be such that there is satisfactory interfacial contact in the area where the
welds are to be made. The distance from the edge of the component to the centre of the weld (edge distance)
should not be less than 1,25 d (see Figure 3), where d is the weld diameter as defined in 8.2. The use of edge
distances less than the recommended values influences weld quality adversely. In such cases, the nominal
weld size specified may be less than that given in 8.2, and therefore due allowance is needed for a lower weld
strength (see 10.4).
The distance between adjacent spot welds (see Figure 3) should not be less than 16 t, and preferably greater.
Tolerances for the distance between the centres of two adjacent spot welds should not exceed ± 10 %,
provided that it does not fall below the minimum value.
8 Electrodes
8.1 Materials
The electrode materials shall be a copper alloy and should possess high thermal and electrical conductivity.
They should comply with, and be used in accordance with, ISO 5182.
8.2 Dimensions
The welding electrodes should be of sufficient cross sectional area and strength to carry the welding current
and electrode force without overheating, excessive deformation, or excessive deflection.
The electrode dimensions should conform to ISO 5184 for straight electrodes, ISO 5830 for male electrode
caps, and ISO 5821 for female electrode caps, as applicable.
1) Certain surface treatments, such as the application of paint primers, rust preventatives, and oils, can be applied
before welding, provided that the coating is uniform in thickness and it has been shown that consistent welds conforming
to this International Standard can be obtained. Excessive use of surface pre-treatment reduces the length of electrode life.
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ISO 14373:2006(E)
Key
d weld diameter
t sheet thickness
Figure 3 — Recommended edge conditions and weld pitch
When welding two sheets of thickness of maximum 3 mm using truncated cone type electrodes, the electrode
tip diameter should be chosen from standard sizes according to the following equation.
d = 5√t (1)
e
where
d is the initial tip diameter, in mm
e
t is the thickness of the sheet in contact with the electrode, in mm
When using truncated cone electrodes, the initial (or set-up) weld diameter should be equal to the diameter of
the electrode tip; i.e.
d = d = 5√t (2)
e
where
d is the weld diameter, in mm
6 © ISO 2006 – All rights reserved
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ISO 14373:2006(E)
CAUTION — The use of a smaller weld size than that given by Equation (2) may result in lower weld
strength. This needs to be taken into account in all design calculations (see Table 1).
NOTE 1 When using domed electrodes with small tip radii or electrodes with very small working faces, Equation (1)
does not always apply, in which case the electrode dimensions depend on accessibility and flange width. In such cases,
the electrode tip dimensions and welding conditions are selected to give a weld diameter as specified in Equation (2), and
they meet the minimum requirements outlined in Clause 10.
When welding two sheets of dissimilar thickness, the electrode dimensions and the required weld size should
be specified with reference to the thinner sheet thickness. In the case of three thicknesses, the thinner sheet
of each combination should be used as the reference.
Where a pad or mandrel is used a
...
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