SIST EN ISO 14744-1:2008

SLOVENSKI STANDARD
01-september-2008
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SIST EN ISO 14744-1:2001
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Welding - Acceptance inspection of electron beam welding machines - Part 1: Principles
and acceptance conditions (ISO 14744-1:2008)
Schweißen - Abnahmeprüfung von Elektronenstrahl-Schweißmaschinen - Teil 1:
Grundlagen und Abnahmebedingungen (ISO 14744-1:2008)
Soudage - Essais de réception des machines de soudage par faisceau d'électrons -
Partie 1: Principes et conditions de réception (ISO 14744-1:2008)
Ta slovenski standard je istoveten z: EN ISO 14744-1:2008
ICS:
25.160.30 Varilna oprema Welding equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 14744-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2008
ICS 25.160.30 Supersedes EN ISO 14744-1:2000
English Version
Welding - Acceptance inspection of electron beam welding
machines - Part 1: Principles and acceptance conditions (ISO
14744-1:2008)
Soudage - Essais de réception des machines de soudage Schweißen - Abnahmeprüfung von Elektronenstrahl-
par faisceau d'électrons - Partie 1: Principes et conditions Schweißmaschinen - Teil 1: Grundlagen und
de réception (ISO 14744-1:2008) Abnahmebedingungen (ISO 14744-1:2008)
This European Standard was approved by CEN on 26 April 2008.
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.
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EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14744-1:2008: E
worldwide for CEN national Members.

Contents Page
Foreword.3

Foreword
This document (EN ISO 14744-1:2008) 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 November 2008, and conflicting national standards shall be withdrawn
at the latest by November 2008.
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.
This document supersedes EN ISO 14744-1:2000.
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 the United Kingdom.
Endorsement notice
The text of ISO 14744-1:2008 has been approved by CEN as a EN ISO 14744-1:2008 without any
modification.
INTERNATIONAL ISO
STANDARD 14744-1
Second edition
2008-05-01
Welding — Acceptance inspection of
electron beam welding machines —
Part 1:
Principles and acceptance conditions
Soudage — Essais de réception des machines de soudage par
faisceau d'électrons —
Partie 1: Principes et conditions de réception

Reference number
ISO 14744-1:2008(E)
©
ISO 2008
ISO 14744-1:2008(E)
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ii © ISO 2008 – All rights reserved

ISO 14744-1:2008(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 14744-1 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 10, Unification of requirements in the field of metal welding.
This second edition cancels and replaces the first edition (ISO 14744-1:2000) which has been technically
revised.
ISO 14744 consists of the following parts, under the general title Welding — Acceptance inspection of electron
beam welding machines:
⎯ Part 1: Principles and acceptance conditions
⎯ Part 2: Measurement of accelerating voltage characteristics
⎯ Part 3: Measurement of beam current characteristics
⎯ Part 4: Measurement of welding speed
⎯ Part 5: Measurement of run-out accuracy
⎯ Part 6: Measurement of stability of spot position
Requests for official interpretations of any aspect of this part of ISO 14744 should be directed to the
Secretariat of ISO/TC 44/SC 10 via your national standards body, a complete listing of which can be found at
www.iso.org.
ISO 14744-1:2008(E)
Introduction
Components, failure of which will endanger life, are subject to comprehensive test and acceptance specifications,
which, among other things, require production equipment to be of proven type and in accordance with the state
of the art. Similarly, in welding practice, standards apply that specify, for example, the required manual skills
which a welder must have for controlling the weld.
In welding processes that are not under direct manual control, such as in electron beam welding, requirements
for various machine parameters are established. This standard series on acceptance inspection of electron
beam welding machines is based on the concept that the production of continuously high-quality welds is
ensured if, among other things, the settings, within defined limits, are reproducible during the operating period.
Taking this into account, this standard specifies details of the main machine parameters (accelerating voltage,
beam current, lens current and welding speed characteristics) together with deviations permitted in short-term or
long-term operation. It also includes requirements regarding the run-out accuracy of the devices positioning the
workpiece and regarding the stability of the spot position of the electron beam. Users, manufacturers, research
experts and inspection bodies are all agreed that electron beam welding machines complying with the
requirements are suitable for welding components subject to acceptance inspection, such as aircraft equipment,
pressure vessels, valves, etc., within specified setting ranges, assuming that other conditions (e.g. qualified staff,
quality control) are fulfilled.
ISO 14744 [any part(s)] can be referred to in contracts for supply of electron beam welding machines. Further
tests are not normally required if proof of satisfactory welding results is provided in the form of routine
inspection documentation. However, the requirements of the standard can also be used for inspection as part
of maintenance, if required by contract.

iv © ISO 2008 – All rights reserved

INTERNATIONAL STANDARD ISO 14744-1:2008(E)

Welding — Acceptance inspection of electron beam welding
machines —
Part 1:
Principles and acceptance conditions
1 Scope
This part of ISO 14744 specifies requirements for acceptance inspection of electron beam welding machines
preferably when first installed on the user's premises.
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 17662, Welding — Calibration, verification and validation of equipment used for welding, including
ancillary activities
3 Symbols and abbreviated terms
For the purposes of this part of ISO 14744, the following symbols apply:
A focal distance, in millimetres
F
A work distance, in millimetres
W
a ; a ; a deviation, in millimetres, of electron beam axis from weld groove centre or of beam focus from
x y z
groove centre on weld surface in the x-, y- or z-direction of feed, as a measure of the run-out
accuracy
D diameter, in millimetres or in centimetres, of a circumference weld seam
I beam current, in milliamperes
B
I maximum beam current, in milliamperes, corresponding to U and U , respectively
B max A max A min
I minimum beam current, in milliamperes, corresponding to U and U , respectively
B min A max A min
I lens current, in milliamperes

L
I lens current, in milliamperes, at U and for A

L max A max F min
I lens current, in milliamperes, at U and for A
L min A min F max
ISO 14744-1:2008(E)
m load, in kilograms force, on the work table or on rotating fixture resulting from workpiece mass
including that of any clamping device
n rotational frequency, in reciprocal minutes, of rotating fixture
t time, in seconds, for welding a seam
w
t maximum time, in seconds, for welding a seam
w max
Q pressure rise rate, in pascal cubic decimetres per second,
...