1、BSI Standards PublicationBS EN ISO 14272:2016Resistance welding Destructive testing of welds Specimen dimensions andprocedure for cross tensiontesting of resistance spot andembossed projection weldsBS EN ISO 14272:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation o
2、f EN ISO 14272:2016. It supersedes BS EN ISO 14272:2001 which iswithdrawn.The UK participation in its preparation was entrusted to Technical Committee WEE/-/1, Briefing committee for welding.A list of organizations represented on this committee can be obtained on request to its secretary.This public
3、ation does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 79579 4 ICS 25.160.40 Compliance with a British Standard cannot confer immunit
4、y from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14272 March 2016 ICS 25.
5、160.40 Supersedes EN ISO 14272:2001English Version Resistance welding - Destructive testing of welds - Specimen dimensions and procedure for cross tension testing of resistance spot and embossed projection welds (ISO 14272:2016) Soudage par rsistance - Essais destructifs des soudures - Dimensions de
6、s prouvettes et mode opratoire pour lessai de traction en croix des soudures par rsistance par points et par bossages (ISO 14272:2016) Widerstandsschweien - Zerstrende Prfung von Schweiverbindungen - Probenmae und Verfahren fr die Kopfzugprfung an Widerstandspunkt- und Buckelschweiungen mit geprgten
7、 Buckeln (ISO 14272:2016) This European Standard was approved by CEN on 5 December 2015. 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 lis
8、ts 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
9、 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 Yu
10、goslav 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 COMIT EUROP
11、EN DE NORMALISATION EUROPISCHES KOMITEE FR 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 worldwide for CEN national Members. Ref. No. EN ISO 14272:2016 EBS EN ISO 14272:2016EN ISO 14272:2016 (E) 3 Eu
12、ropean foreword This document (EN ISO 14272:2016) has been prepared by IIW International Institute of Welding 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 st
13、andard, 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
14、rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 14272:2001. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European
15、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
16、, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 14272:2016 has been approved by CEN as EN ISO 14272:2016 without any modification. BS EN ISO 14272:2016ISO 14272:2016(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions
17、. 14 Test specimen 15 Test equipment and testing procedure . 36 Test report . 6Annex A (informative) Exploded view of a hydraulic clamping device . 8Bibliography .10 ISO 2016 All rights reserved iiiContents PageBS EN ISO 14272:2016ISO 14272:2016(E)ForewordISO (the International Organization for Stan
18、dardization) 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
19、 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 u
20、sed 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
21、 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 identif
22、ied 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
23、 the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is IS
24、O/IIW, International Institute of Welding, Commission III.This second edition cancels and replaces the first edition (ISO 14272:2000), which has been technically revised.Requests for official interpretations of any aspect of this International Standard should be directed to the ISO Central Secretari
25、at, who will forward them to the IIW Secretariat for an official response.iv ISO 2016 All rights reservedBS EN ISO 14272:2016ISO 14272:2016(E)IntroductionThis edition of ISO 14272 no longer includes figures showing failure types and modes for tensile shear and cross tension testing in accordance wit
26、h ISO 14329.ISO 14272 has been revised to align it with ISO 17677-1. ISO 2016 All rights reserved vBS EN ISO 14272:2016BS EN ISO 14272:2016Resistance welding Destructive testing of welds Specimen dimensions and procedure for cross tension testing of resistance spot and embossed projection welds1 Sco
27、peThis International Standard specifies specimen dimensions and a testing procedure for the cross tension testing of spot and projection welds in overlapping sheets in any metallic material of thickness 0,5 mm to 3 mm, where the welds have a maximum diameter of 7t (where t is the sheet thickness in
28、mm).The object of cross tension testing is to determine the tensile force that the test specimen can sustain.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the editi
29、on cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring
30、systemISO 17677-1, Resistance welding Vocabulary Part 1: Spot, projection and seam welding3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 17677-1 and the following apply.3.1cross tension strengthCTSmaximum cross tension force obtained from this test3.
31、2cross tension forceforce applied on test specimen during cross tension testing4 Test specimenThe test specimen is composed of two rectangular coupons as shown in Figure 1. If clamping bolts are used, two holes shall be drilled in each coupon. If a hydraulic clamping system is used for clamping, no
32、holes are required.The weld shall be centred in the test specimen with a tolerance of 1 mm to every direction.Figures 2 and 3 illustrate examples of a welding jig/template, which can be used for welding the two sheets together. Two punched strips are placed at right angles to each other, held in the
33、 jig, and welded together. To obtain a statistically significant average, several specimens shall be tested.INTERNATIONAL STANDARD ISO 14272:2016(E) ISO 2016 All rights reserved 1BS EN ISO 14272:2016ISO 14272:2016(E)Dimensions in millimetres1Key1 weldFigure 1 Test specimen for cross tension testDime
34、nsions in millimetres1 234Key1 locator pin2 test specimen3 welding electrode4 insulation materialFigure 2 Example of a welding jig for welding cross tension test specimens with holes2 ISO 2016 All rights reservedBS EN ISO 14272:2016ISO 14272:2016(E)Dimensions in millimetresKeyD hole diametert sheet
35、thicknessNOTE For specimens without holes (clamping bolts), the hole diameter and thickness of the welding jig/template can be determined in accordance with the electrode configuration.Figure 3 Example of a welding jig for welding cross tension test specimens without holes5 Test equipment and testin
36、g procedureFor test specimens with holes and clamping bolts, the assembled specimen shall be held in clamps as shown in Figure 4. For test specimens without holes a hydraulic clamping system, as shown in Figure 5, can be used in place of the testing clamps illustrated in Figure 4.After clamping, the
37、 test specimen shall be pulled apart using a tensile testing machine, which satisfies the requirements of ISO 7500-1. The measurement accuracy of force shall be equal or less than 1 %.The cross tension force shall be measured during testing. The cross tension strength shall be determined from the ma
38、ximum force value. All tests shall be carried out at room temperature.The cross tension strength values obtained in accordance with this test shall be recorded, including type of failure mode and weld diameter for each weld in accordance with ISO 17677-1. See also Clause 6.A load-displacement diagra
39、m shall be created to give information about the deformation of the test specimen. An example of such a diagram is shown in Figure 6. ISO 2016 All rights reserved 3BS EN ISO 14272:2016ISO 14272:2016(E)Dimensions in millimetres196100A A150a) Top view2160b) A-A cross sectionKey1 clamping bolt M18 43LG
40、2 test specimenFigure 4 Example of testing clamps for test specimen with holes4 ISO 2016 All rights reservedBS EN ISO 14272:2016ISO 14272:2016(E)11223Key1 hydraulic cylinders2 dies to clamp test specimen3 test specimenNOTE Test specimens are inserted from the opposite side. An exploded view of a cla
41、mping device can be seen in Annex A.Figure 5 Example of a testing device with hydraulic clamps ISO 2016 All rights reserved 5BS EN ISO 14272:2016ISO 14272:2016(E)FCTSCTSCTS0lKeyCTS cross tension strengthF force/loadl crosshead displacementFigure 6 Examples of load Displacement curve of spot welded j
42、oints (Not to scale)6 Test reportThe test report shall contain at least the following information:a) a reference to this International Standard, i.e. ISO 14272:2016;b) the welding process used;c) the welding conditions and equipment;d) the material and its condition;e) the dimensions of the test spe
43、cimens;f) individual values, mean value and standard deviation of the cross tension strength in kN;g) failure description (plug failure, interfacial failure, etc.);h) individual values, mean value and standard deviation of the weld diameter;6 ISO 2016 All rights reservedBS EN ISO 14272:2016ISO 14272
44、:2016(E)i) special remarks, if any. ISO 2016 All rights reserved 7BS EN ISO 14272:2016ISO 14272:2016(E)Annex A (informative) Exploded view of a hydraulic clamping deviceAn exploded view of a hydraulic clamping device as shown in Figure 5 is given in Figure A.1.The device consists basically of four h
45、ydraulic cylinders, four fixed dies, four moveable dies, two frame pieces, two shafts and screws.Triangle surface treatments are applied to a part of each die surface, on the contact side to test specimen, to avoid slippage of the test specimen during tensile testing.8 ISO 2016 All rights reservedBS
46、 EN ISO 14272:2016ISO 14272:2016(E)1122337456Key1 shafts 5 fixed dies2 hydraulic cylinders 6 lower frame3 moveable dies 7 fixed pins4 upper frameNOTE Anti-slippage treatment is applied to the back area of each die surface.Figure A.1 Detail of a hydraulic clamp device ISO 2016 All rights reserved 9BS
47、 EN ISO 14272:2016ISO 14272:2016(E)Bibliography1 ISO 14329, Resistance welding Destructive tests of welds Failure types and geometric measurements for resistance spot, seam and projection welds10 ISO 2016 All rights reservedBS EN ISO 14272:2016This page deliberately left blankThis page deliberately
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