1、November 2016 English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 25.160.40!%u“2588259www.din.deD
2、IN EN ISO 14270Resistance welding Destructive testing of welds Specimen dimensions and procedure for mechanized peel testing resistance spot, seam and embossed projection welds (ISO 14270:2016);English version EN ISO 14270:2016,English translation of DIN EN ISO 14270:2016-11Widerstandsschweien Zerst
3、rende Prfung von Schweiverbindungen Probenmae und Verfahren fr die mechanisierte Schlprfung an Widerstandspunkt, Rollennaht und Buckelschweiungen mit geprgten Buckeln (ISO 14270:2016);Englische Fassung EN ISO 14270:2016,Englische bersetzung von DIN EN ISO 14270:2016-11Soudage par rsistance Essais de
4、structifs des soudures Dimensions des prouvettes et mode opratoire pour lessai de pelage mcanis des soudurespar rsistance par points, la molette et par bossages (ISO 14270:2016);Version anglaise EN ISO 14270:2016,Traduction anglaise de DIN EN ISO 14270:2016-11SupersedesDIN EN ISO 14270:200204www.beu
5、th.deDocument comprises 23 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.11.16 DIN EN ISO 14270:2016-11 2 A comma is used as the decimal marker. National foreword This document (EN ISO 14270:2016) has been prepared by Technic
6、al Committee ISO/TC 44 “Welding and allied processes” in collaboration with Technical Committee CEN/TC 121 “Welding and allied processes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Schweien und verwandte Verfahren (DIN Standards Commi
7、ttee Welding and Allied Processes), Working Group NA 092-00-12-07 AK Prfen von Widerstandsschweiverbindungen (DVS AG V 3.9). The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 7500-1 DIN EN ISO 7500-1 ISO 14329 DIN EN ISO 14329 ISO 17677-1
8、 DIN EN ISO 17677-1 Amendments This standard differs from DIN EN ISO 14270:2002-04 as follows: a) figures showing failure types, and procedures for tensile shear and cross tension testing in accordance with ISO 14329:2003 are no longer included; b) the scope now covers testing of welds made in high
9、strength materials including ultra-high strength materials as well as ordinary strength materials; c) the standard has been adapted to DIN EN ISO 17667-1; d) the standard has been technically and editorially revised. Previous editions DIN EN ISO 14270: 2002-04 National Annex NA (informative) Bibliog
10、raphy DIN EN ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system DIN EN ISO 14329, Resistance welding Destructive tests of welds Failure types and geometric measurement
11、s for resistance spot, seam and projection welds DIN EN ISO 17677-1, Resistance welding Vocabulary Part 1: Spot, projection and seam welding EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14270 March 2016 ICS 25.160.40 Supersedes EN ISO 14270:2001English Version Resistance welding - Destru
12、ctive testing of welds - Specimen dimensions and procedure for mechanized peel testing resistance spot, seam and embossed projection welds (ISO 14270:2016) Soudage par rsistance - Essais destructifs des soudures - Dimensions des prouvettes et mode opratoire pour lessai de pelage mcanis des soudures
13、par rsistance par points, la molette et par bossages (ISO 14270:2016) Widerstandsschweien - Zerstrende Prfung von Schweiverbindungen - Probenmae und Verfahren fr die mechanisierte Schlprfung an Widerstandspunkt-, Rollennaht- und Buckelschweiungen mit geprgten Buckeln(ISO14270:2016) This European Sta
14、ndard was approved by CEN on 13 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 lists and bibliographical references concerni
15、ng 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 i
16、ts 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, Germ
17、any, 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 EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR
18、 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 14270:2016 EForeword .4Introduction 51 Scope . 62 Normative references 63 Terms and definitions . 64
19、 Test pieces and specimens . 75 Preparation of mechanized peel test specimens .105.1 General 105.2 Bending procedure of weld test specimens after welding .105.3 Bending procedure of test specimens before welding Alternative procedure 105.4 Dimensions and accuracy .136 Peel testing procedure and test
20、 equipment 147 Re-test .158 Test report 15Annex A (normative) Measurement of seam weld size 16Annex B (informative) Influence of spot weld position on test results .17Annex C (informative) Examples of bending tools 18Annex D (informative) Determination of the bending centre position with press brake
21、 systems .20Bibliography .21Contents Page2EN ISO 14270:2016 (E) DIN EN ISO 14270:2016-11 European foreword .3European foreword This document (EN ISO 14270:2016) has been prepared by IIW International Institute of Welding in collaboration with Technical Committee CEN/TC 121 “Welding and allied proces
22、ses” 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.
23、 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 14270:2001. According to the CEN-CENELEC Internal Reg
24、ulations, 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,
25、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 14270:2016 has been approved by CEN as EN ISO 14270:2016 without any modification. 3EN ISO 14
26、270:2016 (E) DIN EN ISO 14270:2016-11 ForewordISO (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
27、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 Electrotech
28、nical 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 d
29、ocuments 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 respo
30、nsible 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
31、 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 ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following
32、URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/IIW, International Institute of Welding, Commission III.This second edition cancels and replaces the first edition (ISO 14270:2000), which has been technically revised.Requests for official interpretations of
33、 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.4EN ISO 14270:2016 (E) DIN EN ISO 14270:2016-11 IntroductionThis edition of ISO 14270 no longer includes figures showing failure types a
34、nd modes for tensile shear and cross tension testing in accordance with ISO 14329.ISO 14270 has been revised to align it with ISO 17677-1. This edition of ISO 14270 is now applicable to testing of welds made in high strength materials including ultra-high strength materials as well as ordinary stren
35、gth materials. Some of the figures related to the failure types and modes have been revised in accordance with ISO 17677-1.5EN ISO 14270:2016 (E) DIN EN ISO 14270:2016-11 1 ScopeThis International Standard specifies specimen dimensions and a testing procedure for mechanized peel testing of single sp
36、ot, seam and embossed 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 mm).For welds of diameter between 5t and 7t, the peel strength values obtained may be lower than expec
37、ted when using the recommended test specimen dimensions because the test specimen width is designed for welds of diameter of 5t or less.The object of mechanized peel testing is to determine the peel strength that the test specimen can sustain.2 Normative referencesThe following documents, in whole o
38、r 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 7500-1, Metallic materials Verification
39、 of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring systemISO 17677-1, Resistance welding Vocabulary Part 1: Spot, projection and seam welding3 Terms and definitionsFor the purposes of this document, the terms and defi
40、nitions given in ISO 17677-1 and the following apply.3.1mechanized peel strengthMPSmaximum peel force obtained from this test3.2peel forceforce applied on test specimen during mechanized peel testing3.3minimum seam weld widthwminminimum width of the seam weld measured at the faying surfaceNote 1 to
41、entry: See Figure A.1.Note 2 to entry: For interface failures, the seam weld width is measured in the plane of the interface in a transverse direction to the longitudinal axis of the linear seam weld.6EN ISO 14270:2016 (E) DIN EN ISO 14270:2016-11 4 Test pieces and specimensTable 1 gives test specim
42、en dimensions for mechanized peel tests. The positional accuracy of the weld on the test specimen shall be 1 mm or less in every direction.Table 1 Test specimen dimensions and weld positionThickness Flange length Specimen width Specimen lengthFree length be-tween clampsEdge distancet a b lslfemm mm
43、mm mm mm mm0,5 t 3,0 50 50 160 105 25NOTE See Annex B for an explanation of the influence of weld position on mechanized peel test results of spot welds.Spot welded test specimens can be produced by welding each one separately in accordance with Figure 1 a), or making a number of individual welds jo
44、ining two test plates as a multiple weld test piece, and then cutting them in accordance with Figure 2.Embossed projection weld test specimens shall only be produced by welding a single weld specimen as shown in Figure 1 a).In order to obtain statistically significant average results, it is recommen
45、ded that several specimens are tested.In the case of unequal sheet thicknesses, the test specimen dimensions shall be based on those of the thinner sheet. Mechanized peel test specimens in accordance with Figure 1 c) shall be produced in accordance with Clause 5 or Clause 6.7EN ISO 14270:2016 (E) DI
46、N EN ISO 14270:2016-11 Dimensions in millimetresblb/2 0,5b/2 0,5sbb/2 0,51aera) Test specimen for single spot or embossed projection weldb) Test specimen for seam weldc) Mechanized peel test specimenKey1 weldFigure 1 Form of test specimen with weld position for single weldWhen using multi-spot weldi
47、ng equipment, each electrode shall weld an individual test specimen as shown in Figure 1 a).For multiple weld test pieces in large sheets, welding starts from an end location to the other end as shown in Figure 2. Since shunting occurs during welding of multiple weld test pieces, the welding current
48、 used shall be higher than that for welding for a single weld test specimen. For multiple weld pieces, the first and last welds shall be discarded as shown in Figure 2.8EN ISO 14270:2016 (E) DIN EN ISO 14270:2016-11 12bl1 2 3 N-3 N-2N-1Nsettb/2Key1 spot or embossed projection welds N number of test
49、specimens2 cutsaDiscarded.NOTE For other symbols, see Table 1.Figure 2 Example for preparation of multiple weld test pieces3124123N-3 N-2 N-1NKey1 seam weld 4 stop position of welding2 cuts N number of test specimens3 start of weldingaDiscarded.Figure 3 Example for preparation of seam welded test piecesFor seam welds, a continuous weld is made as shown in Figure 3. Test specimens shall be made a
