1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 25239-3:2011Friction stir welding AluminiumPart 3: Qualification of welding operators(ISO 25239-3:2011)BS EN ISO 25239-3:2011 BRITISH STANDARDNational forewordThis Brit
2、ish Standard is the UK implementation of EN ISO25239-3:2011.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/41, Friction welding.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to inclu
3、de all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012ISBN 978 0 580 60294 8ICS 25.160.01; 25.160.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published unde
4、r the authority of theStandards Policy and Strategy Committee on 31 January 2012.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 25239-3 December 2011 ICS 25.160.01; 25.160.10 English Version Friction stir welding - Aluminium - Part 3: Qu
5、alification of welding operators (ISO 25239-3:2011) Soudage par friction-malaxage - Aluminium - Partie 3: Qualification des oprateurs soudeurs (ISO 25239-3:2011)Rhrreibschweien - Aluminium - Teil 3: Qualifizierung der Bediener (ISO 25239-3:2011) This European Standard was approved by CEN on 4 June 2
6、011. 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
7、 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-CE
8、NELEC 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Mal
9、ta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of expl
10、oitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 25239-3:2011: EBS EN ISO 25239-3:2011EN ISO 25239-3:2011 (E) 3 Foreword This document (EN ISO 25239-3:2011) has been prepared by the International Institute of Welding in collaboration with Technical C
11、ommittee 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 June 2012, and conflicting national standards shall be withdrawn at the lates
12、t by June 2012. 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 standa
13、rds organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Po
14、land, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 25239-3:2011 has been approved by CEN as a EN ISO 25239-3:2011 without any modification. BS EN ISO 25239-3:2011ISO 25239-3:2011(E) ISO 2011 All rights reserved iiiConten
15、ts Page Foreword iv Introduction . v 1 Scope 1 2 Normative references 1 3 Terms and definitions . 1 4 Requirements . 1 4.1 Welding operator qualification . 1 4.2 Essential variables and ranges of qualification . 2 4.3 Qualification methods . 3 4.4 Test welds 4 4.5 Test record . 5 5 Certificate . 5 5
16、.1 General . 5 5.2 Period of validity 6 Annex A (normative) Functional knowledge of the welding unit . 7 Annex B (informative) Knowledge of welding technology . 8 Annex C (informative) Qualification test certificate for FSW operators 10 Bibliography 12 BS EN ISO 25239-3:2011ISO 25239-3:2011(E) iv IS
17、O 2011 All rights reservedForeword 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
18、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 Commi
19、ssion (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 technica
20、l 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 shal
21、l not be held responsible for identifying any or all such patent rights. ISO 25239-3 was prepared by the International Institute of Welding, which has been approved as an international standardizing body in the field of welding by the ISO Council. ISO 25239 consists of the following parts, under the
22、 general title Friction stir welding Aluminium: Part 1: Vocabulary Part 2: Design of weld joints Part 3: Qualification of welding operators Part 4: Specification and qualification of welding procedures Part 5: Quality and inspection requirements Requests for official interpretations of any aspect of
23、 this part of ISO 25239 should be directed to the ISO Central Secretariat, who will forward them to the IIW Secretariat for an official response. BS EN ISO 25239-3:2011ISO 25239-3:2011(E) ISO 2011 All rights reserved vIntroduction Welding processes are widely used in the fabrication of engineered st
24、ructures. During the second half of the twentieth century, fusion welding processes, wherein fusion is obtained by the melting of parent material and usually a filler metal, dominated the welding of large structures. Then, in 1991, Wayne Thomas at TWI invented friction stir welding (FSW), which is c
25、arried out entirely in the solid phase (no melting). The increasing use of FSW has created the need for this International Standard in order to ensure that welding is carried out in the most effective way and that appropriate control is exercised over all aspects of the operation. This International
26、 Standard focuses on the FSW of aluminium because, at the time of publication, the majority of commercial applications for FSW involved aluminium. Examples include railway carriages, consumer products, food processing equipment, aerospace structures, and marine vessels. The parts of this Internation
27、al Standard are listed in the foreword. Part 1 defines terms specific to FSW. Part 2 specifies design requirements for FSW joints in aluminium. Part 3 specifies requirements for the qualification of an operator for the FSW of aluminium. Part 4 specifies requirements for the specification and qualifi
28、cation of welding procedures for the FSW of aluminium. A welding procedure specification (WPS) is needed to provide a basis for planning welding operations and for quality control during welding. Welding is considered a special process in the terminology of standards for quality systems. Standards f
29、or quality systems usually require that special processes be carried out in accordance with written procedure specifications. Metallurgical deviations constitute a special problem. Because non-destructive testing of the mechanical properties is impossible at the present level of technology, this has
30、 resulted in the establishment of a set of rules for qualification of the welding procedure prior to the release of the WPS to actual production. ISO 25239-4 defines these rules. Part 5 specifies a method for determining the capability of a manufacturer to use the FSW process for the production of a
31、luminium products of the specified quality. It defines specific quality requirements, but does not assign those requirements to any specific product group. To be effective, welded structures should be free from serious problems in production and in service. To achieve that goal, it is necessary to p
32、rovide controls from the design phase through material selection, fabrication, and inspection. For example, poor design can create serious and costly difficulties in the workshop, on site or in service. Incorrect material selection can result in welding problems, such as cracking. Welding procedures
33、 have to be correctly formulated and qualified to avoid imperfections. To ensure the fabrication of a quality product, management should understand the sources of potential trouble and introduce appropriate quality and inspection procedures. Supervision should be implemented to ensure that the speci
34、fied quality is achieved. BS EN ISO 25239-3:2011BS EN ISO 25239-3:2011INTERNATIONAL STANDARD ISO 25239-3:2011(E) ISO 2011 All rights reserved 1Friction stir welding Aluminium Part 3: Qualification of welding operators 1 Scope This part of ISO 25239 specifies requirements for the qualification of wel
35、ding operators for the friction stir welding (FSW) of aluminium. In this part of ISO 25239, the term aluminium refers to aluminium and its alloys. This part of ISO 25239 does not apply to friction stir spot welding. 2 Normative references The following referenced documents are indispensable for the
36、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 17636 (all parts), Non-destructive testing of welds Radiographic testing1)ISO 17640, Non-destructive testi
37、ng of welds Ultrasonic testing Techniques, testing levels, and assessment ISO 25239-1, Friction stir welding Aluminium Part 1: Vocabulary ISO 25239-4:2011, Friction stir welding Aluminium Part 4: Specification and qualification of welding procedures ISO 25239-5:2011, Friction stir welding Aluminium
38、Part 5: Quality and inspection requirements 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 25239-1 apply. 4 Requirements 4.1 Welding operator qualification Welding operators shall be qualified by one of the following tests, as detailed in 4.3: stand
39、ard welding test, see 4.3.1; 1)To be published. (Revision of ISO 17636:2003)BS EN ISO 25239-3:2011ISO 25239-3:2011(E) 2 ISO 2011 All rights reserved welding procedure test, see 4.3.2; pre-production welding test or production welding test, see 4.3.3; production welding sample test, see 4.3.4. In add
40、ition, the welding operators knowledge of the welding unit to be used for the qualification test shall be tested. See Annex A. Any of the welding operator qualification tests can be supplemented by a test of knowledge related to welding technology. Such a test is recommended, but it is not mandatory
41、. Annex B includes an example of such an examination. The essential variables and ranges of qualification are specified in 4.2 and the validity is specified in Clause 5. Provided that the welding operator works in accordance with a welding procedure specification (WPS), the range of qualification sh
42、all be limited only as specified in 4.2. A suggested form for the welding operators qualification certificate is shown in Annex C. 4.2 Essential variables and ranges of qualification 4.2.1 General The qualification of welding operators is based on essential variables, as specified in 4.2.2 to 4.2.5.
43、 For each essential variable, a range of qualification is defined. If a welding operator is required to weld outside the range of qualification, then a new qualification test is required. NOTE Friction stir welding is a mechanized process. However, because it is also a solid-state welding process, t
44、he essential variables are different from those applicable to fusion welding processes. 4.2.2 Friction stir welding methods A successful welding operator qualification test made with any type of FSW method qualifies an operator only for that welding method. This subclause applies to FSW methods that
45、 include, but are not limited to, robotic, single spindle, multiple spindle, bobbin tool, retractable probe, or any other FSW method defined in the WPS used for that qualification test. 4.2.3 Welding equipment The following changes require a new qualification: a change from welding with a joint sens
46、or to welding without, although welding without a joint sensor also qualifies an operator to weld with a joint sensor; a change from one type of welding machine to another type of welding machine that requires additional training to operate a test made with any type of machine qualifies only that ty
47、pe of machine, although the addition or removal of jigs and fixtures, feeding units and other ancillary equipment does not change the type of machine; addition, removal or change of control system. 4.2.4 Parent materials A successful test weld made in any aluminium alloy qualifies an operator for al
48、l aluminium alloys. A successful test weld of any parent material thickness qualifies an operator for all parent material thicknesses. BS EN ISO 25239-3:2011ISO 25239-3:2011(E) ISO 2011 All rights reserved 3A successful test weld of any parent material form (including, but not limited to, sheet, tub
49、e, castings, forgings or extrusions) qualifies an operator for all parent material forms and for all tube diameters. 4.2.5 Weld joint geometry A successful test weld made in any weld joint geometry qualifies an operator for all weld joint geometries. 4.3 Qualification methods 4.3.1 Qualification based on standard welding test The test piece shown in Figure 1 shall be used for the standard welding test. A welding operator who has successfully completed the welding test in accordance with 4.4 shall be con
