SIST EN ISO 669:2016

SLOVENSKI STANDARD
SIST EN ISO 669:2016
01-julij-2016
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]DKWHYH,62
Resistance welding - Resistance welding equipment - Mechanical and electrical
requirements (ISO 669:2016)
Widerstandsschweißen - Widerstandsschweißeinrichtungen - Mechanische und
elektrische Anforderungen (ISO 669:2016)
Soudage par résistance - Matériel de soudage par résistance - Exigences mécaniques et
électriques (ISO 669:2016)
Ta slovenski standard je istoveten z: EN ISO 669:2016
ICS:
25.160.30 Varilna oprema Welding equipment
SIST EN ISO 669:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 669:2016

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SIST EN ISO 669:2016


EN ISO 669
EUROPEAN STANDARD

NORME EUROPÉENNE

March 2016
EUROPÄISCHE NORM
ICS 25.160.30
English Version

Resistance welding - Resistance welding equipment -
Mechanical and electrical requirements (ISO 669:2016)
Soudage par résistance - Matériel de soudage par Widerstandsschweißen -
résistance - Exigences mécaniques et électriques (ISO Widerstandsschweißeinrichtungen - Mechanische und
669:2016) elektrische Anforderungen (ISO 669:2016)
This European Standard was approved by CEN on 2 January 2016.

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-CENELEC 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-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 669:2016 E
worldwide for CEN national Members.

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SIST EN ISO 669:2016
EN ISO 669:2016 (E)
Contents Page
European foreword . 3
2

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SIST EN ISO 669:2016
EN ISO 669:2016 (E)
European foreword
This document (EN ISO 669:2016) has been prepared by Technical Committee ISO/TC 44 “Welding and
allied processes” in collaboration with Technical Committee CEN/TC 121 “Welding and allied
processes” 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 2016, and conflicting national standards
shall be withdrawn at the latest by September 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
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,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 669:2016 has been approved by CEN as EN ISO 669:2016 without any modification.


3

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SIST EN ISO 669:2016

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SIST EN ISO 669:2016
INTERNATIONAL ISO
STANDARD 669
Third edition
2016-02-15
Resistance welding — Resistance
welding equipment — Mechanical and
electrical requirements
Soudage par résistance — Matériel de soudage par résistance —
Exigences mécaniques et électriques
Reference number
ISO 669:2016(E)
©
ISO 2016

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SIST EN ISO 669:2016
ISO 669:2016(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved

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SIST EN ISO 669:2016
ISO 669:2016(E)

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 Mechanical parts of spot, projection, and seam welding equipment . 2
3.2 Mechanical parts of upset and flash welding equipment . 8
3.3 Static mechanical characteristics .11
3.4 Electrical and thermal characteristics .14
3.5 Pneumatic and hydraulic characteristics .16
4 Symbols and abbreviated terms .16
5 Physical environment and operating conditions .18
5.1 General .18
5.2 Ambient air temperature .18
5.3 Liquid cooling medium .18
5.4 Humidity .18
5.5 Altitude .19
5.6 Transportation and storage .19
6 Test conditions .19
6.1 General .19
6.2 Environmental conditions .19
6.3 Measuring instruments .19
7 Rated no load voltage at the output .20
7.1 General .20
7.2 a.c. no load voltage (U ) .20
20
7.3 d.c. no load voltage (U ).20
2d
8 Maximum short circuit current .20
8.1 General .20
8.2 Spot and seam welding equipment .21
8.3 Projection welding equipment .21
8.4 Upset and flash welding equipment .22
9 Thermal rating .23
9.1 General .23
9.2 Thermal test .23
10 Cooling liquid circuit (liquid cooled welding equipment) .23
11 Static mechanical characteristics .24
11.1 General .24
11.2 Spot and projection welding equipment .24
11.2.1 General.24
11.2.2 Eccentricity .25
11.2.3 Angular deflection .26
11.2.4 Radial deflection .26
11.2.5 Axial deflection .27
11.2.6 Machine stiffness .27
11.2.7 Parallelism of top and bottom platen .27
11.2.8 Perpendicularity in platen movement, δ .
4 28
11.3 Seam welding equipment .29
11.3.1 General.29
11.3.2 Eccentricity .29
11.3.3 Angular deflection .30
11.4 Upset welding equipment .30
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SIST EN ISO 669:2016
ISO 669:2016(E)

11.4.1 General.30
11.4.2 Angular deflection .31
12 Rating plate .31
12.1 General .31
12.2 Description .32
12.3 Tolerances .34
13 Instruction manual .34
Annex A (informative) Examples of rating plates .36
Bibliography .38
iv © ISO 2016 – All rights reserved

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SIST EN ISO 669:2016
ISO 669:2016(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 44, Welding and allied processes, Subcommittee
SC 6, Resistance welding and allied mechanical joining.
This third edition cancels and replaces the second edition (ISO 669:2000), which has been technically
revised.
© ISO 2016 – All rights reserved v

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SIST EN ISO 669:2016

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SIST EN ISO 669:2016
INTERNATIONAL STANDARD ISO 669:2016(E)
Resistance welding — Resistance welding equipment —
Mechanical and electrical requirements
1 Scope
This International Standard defines and specifies certain identified electrical and mechanical
characteristics of equipment used for
— resistance spot welding,
— projection welding,
— resistance seam welding,
1)
— upset welding , and
2)
— flash welding .
This International Standard specifies the information to be given in equipment specifications and the
test methods to be used for measuring those characteristics.
Not all requirements apply to all types of equipment.
The following types of power sources are included:
— single phase with alternating welding current;
— single phase with rectified welding current by rectification of the output of the welding transformer;
— single phase with inverter welding transformer;
— three phase with rectified welding current by rectification of the output of the welding transformer;
— three phase with a current rectification in the input of the welding transformer (sometimes called
frequency convertor);
— three phase with inverter welding transformers.
This International Standard does not apply to welding transformers that are separate from the
equipment.
NOTE Safety requirements for resistance welding equipment are covered by IEC 62135–1.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 5826:2014, Resistance welding equipment — Transformers — General specifications applicable to all
transformers
ISO 17657-2, Resistance welding — Welding current measurement for resistance welding — Part 2: Welding
current meter with current sensing coil
1) Often referred to by the non-preferred term, butt welding.
2) Often referred to by the non-preferred term, flash butt welding.
© ISO 2016 – All rights reserved 1

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SIST EN ISO 669:2016
ISO 669:2016(E)

ISO 17657-5, Resistance welding — Welding current measurement for resistance welding — Part 5:
Verification of welding current measuring system
ISO 17677-1, Resistance welding — Vocabulary — Part 1: Spot, projection and seam welding
IEC 62135-1, Resistance welding equipment — Part 1: Safety requirements for design, manufacture and
installation
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 17677-1 and the following apply.
3.1 Mechanical parts of spot, projection, and seam welding equipment
3.1.1
arm
device for transmitting the electrode force (3.1.16) which can also conduct the welding current or
support a separate conductor
Note 1 to entry: See Figure 1 and Figure 3.
3.1.2
welding head
device comprising the force generation and guiding system carrying an electrode holder (3.1.3), platen
(3.1.5), or seam welding head (3.1.6) mounted to the upper arm or directly to the machine body
Note 1 to entry: See Figure 1.
3.1.3
electrode holder
device holding a spot welding electrode (3.1.4) or an electrode adaptor
[SOURCE: ISO 8430-1, ISO 8430-2, and ISO 8430-3]
Note 1 to entry: See Figure 1.
2 © ISO 2016 – All rights reserved

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SIST EN ISO 669:2016
ISO 669:2016(E)

1
1
2
3
3
7
9
8
7
4
4
a)  Spot welding equipment b)  Projection welding equipment
1
1
2
2
10
10
11
11
10
10
4
c)  Longitudinal seam welding equipment d)  Transverse seam welding equipment
7
2
8
6
7
4
1
5
e)  Rocker arm welding equipment
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SIST EN ISO 669:2016
ISO 669:2016(E)

f)  Welding gun without transformer g)  Manual gun with integrated transformer
h)  Robot mount C-gun
Key
1 force generation system 5 frame 9 platen
2 moveable arm 6 transformer 10 seam welding head
3 welding head 7 electrode holder 11 electrode wheel
4 stationary arm 8 spot welding electrode 12 electrode adapter
Figure 1 — Elements of spot, projection, and seam welding equipment
1 1
2 2
3 34
Key
1 clamping device
2 clamping die
3 current-carrying clamping die
4 © ISO 2016 – All rights reserved

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SIST EN ISO 669:2016
ISO 669:2016(E)

4 slide drive
5 slide
6 welding transformer
Figure 2 — Elements of upset welding equipment
a) Arm length fixed b)  Arm length adjustable
Figure 3 — Arms (lower arms)
3.1.4
spot welding electrode
electrode designed for spot welding
[SOURCE: ISO 5184 and ISO 5821]
Note 1 to entry: See Figure 1.
3.1.5
platen
device normally having tee slots and carrying projection welding electrodes or welding tools
[SOURCE: ISO 865]
Note 1 to entry: See Figure 1.
3.1.6
seam welding head
device comprising an electrode wheel bearing (3.1.7) and mounted on the upper and lower arm for
longitudinal and/or transversal seam welding
Note 1 to entry: See Figure 1.
3.1.7
electrode wheel bearing
device guiding the electrode wheel (3.1.8) for force transfer and mostly for current transfer
3.1.8
electrode wheel
electrode as a rotating disc
Note 1 to entry: See Figure 1.
Note 2 to entry: This device can be driven by a motor or moved by the workpiece (idler wheels). The driver can be
direct to the electrode shaft or to its circumference (knurl drive) (see Figure 6).
3.1.9
electrode wheel profile
form of the electrode wheel (3.1.8) being single- or double-sided bevelled or radiused depending on the
welding conditions and access
Note 1 to entry: See Figure 5.
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SIST EN ISO 669:2016
ISO 669:2016(E)

3.1.10
electrode wheel speed
rotational speed, n, of the electrode wheel (3.1.8)
Note 1 to entry: See Figure 4.
3.1.11
electrode wheel speed
linear tangential speed, v, of the electrode wheel (3.1.8) at the circumference
Note 1 to entry: See Figure 4.
3.1.12
throat gap
e
usable distance between the arms (3.1.1) or the outer current
conducting parts of the welding circuit
Note 1 to entry: See Figure 6.
3.1.13
platen distance
e
clamping distance between the platens (3.1.5)
Note 1 to entry: See Figure 6.
Note 2 to entry: See also die distance (3.2.11).
3.1.14
throat depth
l
usable distance from the centre of the platens (3.1.5) or the axes of the electrodes or, in the case of
oblique electrodes, the point of intersection of the electrode axes in the working position or the contact
line of electrode wheels (3.1.8) and that part of the equipment body located closest to it
Note 1 to entry: See Figure 6.
Note 2 to entry: This definition does not consider any offset of the electrode tips.
1
1
1
2
2
2
1
a)  Direct drive b)  Knurl drive c)  Idler wheels
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SIST EN ISO 669:2016
ISO 669:2016(E)

Key
1 electrode wheel
2 workpieces to be welded
Figure 4 — Drive types of electrode wheels
a)  Bevelled b)  Radiused
Figure 5 — Electrode wheel profiles
l l
a)  Spot welding equipment b)  Projection welding equipment
c)  Upset welding equipment (top view) d)  Seam welding equipment
Key
e throat gap
l throat depth
Figure 6 — Main dimensions
3.1.15
electrode stroke
c
physical displacement of electrodes during process function
Note 1 to entry: When the electrode is attached to the force generation system, the stroke of both the electrode
and the driving cylinder is equal.
© ISO 2016 – All rights reserved 7
l
e
e

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SIST EN ISO 669:2016
ISO 669:2016(E)

Note 2 to entry: When the moving electrode is attached to a hinged lever moved by a force generation system, the
maximum stroke of the electrode by convention equals the length of the chord of the arc generated by the tip of
the moving electrode for the full stroke of the driving cylinder.
Note 3 to entry: The stroke of the electrode may be composed of a “work clearance stroke” without any contact,
facilitating the introduction of the workpiece between the electrodes and a smaller “working stroke”.
3.1.16
electrode force
F
force to the workpiece transmitted by the electrodes
3.1.17
maximum electrode force
F
max
maximum electrode force which can be generated by the welding equipment without permanent
damage to its mechanical parts
3.1.18
minimum electrode force
F
min
minimum electrode force which can be used for proper functioning of the welding equipment
3.2 Mechanical parts of upset and flash welding equipment
3.2.1
slide drive
drive generating and transferring the movements and upset forces necessary for welding to a workpiece
located in the clamping device (3.2.2)
Note 1 to entry: See Figure 2.
Note 2 to entry: For flash welding, the drive may be required to reciprocate the slide for preheating by following
the flashing movement and to provide the upset force.
3.2.2
clamping device
device generating the contact force necessary for current flow and providing the clamping force (3.2.13)
necessary to withstand the upset force if no supplementary clamping devices (3.2.3) or backstops (3.2.4)
are used
Note 1 to entry: See Figure 2.
3.2.3
supplementary clamping device
non-current carrying device to provide the clamping force (3.2.13) necessary to resist the upset force
3.2.4
backstop
device to support the total or a part of the upsetting force (3.2.15) to a workpiece in order to prevent a
workpiece from sliding during upsetting
3.2.5
clamping die
device designed to transfer all forces to the workpiece in contacting with its clamping face
Note 1 to entry: See Figure 2 and Figure 7.
8 © ISO 2016 – All rights reserved

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SIST EN ISO 669:2016
ISO 669:2016(E)

2
1
1 1
1
a)  Flat b)  Prism c)  Cylindrical d) Profile
Key
1 mounting or support face
2 contact and/or clamping face
Figur
...