1、BRITISH STANDARD Specimen dimensions and procedure for cross tension testing resistance spot and embossed projection welds The European Standard EN IS0 14272:2001 has the status ofa British Standard ICs 25.160.40 BS EN IS0 14272:2001 Incorporating Corrigendum No. I Wk present to the responsible inte
2、rnationalEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this committee can be obtained on request to i
3、ts secretary. Cross-refer en ces The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility ofthe BSI
4、Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary o
5、f pages This document comprises a front cover, an inside front cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, pages ii and iii, a blank page, pages 1 to 8, the Annex ZA page and a back cover. The BSI copyright date displayed in this document indicates when the document w
6、as last issued. Amendments issued since publication O BSI 11 March 2002 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 14272 October 2001 ICs 25.160.40 English version Specimen dimensions and procedure
7、 for cross tension testing resistance spot and embossed projection welds (IS0 14272:2000) Dimensions des prouvettes et mode opratoire pour lessai de traction sur prouvettes en croix des soudures par rsistance par points et par bossages (IS0 14272:2000) Probenmae und Durchfhrung fr die Kopfzugprfung
8、an Widerstandspunkt- und Buckelschweiungen mit geprgten Buckeln (IS0 14272:2000) This European Standard was approved by CEN on 5 October 2001 CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a nati
9、onal standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any
10、other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany,
11、Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights
12、 of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN IS0 14272:2001 E COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN IS0 14272:2001 I CORRECTED 2002-01-02 I Foreword The text of the International Standard
13、from Technical Committee IIW has been taken over as a European Standard by Technical Committee CEN/TC 121 “Welding“, the secretariat of which is held by DS. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the l
14、atest by April 2002, and conflicting national standards shall be withdrawn at the latest by April 2002. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, D
15、enmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard IS0 14272:2000 has been approved by CEN as a European Standard without any modifi
16、cations. NOTE Normative references to International Standards are listed in annex ZA (normative). COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN IS0 14272:2001 INTERNATIONAL STANDARD IS0 14272 First edition 2000-1 1-01 Specimen dimensions and procedure fo
17、r cross tension testing resistance spot and embossed projection welds Dimensions des prouveffes ef mode oprafoire pour lessai de fracfion sur prouveffes en croix des soudures par rsisfance par poinfs ef par bossages Reference number IS0 14272:2000(E) COPYRIGHT European Committee for StandardizationL
18、icensed by Information Handling ServicesEN IS0 14272:2001 II COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN IS0 14272:2001 Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member
19、 bodies). The work of preparing International Standards is normally carried out through IS0 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
20、 and non-governmental, in liaison with ISO, also take part in the work. IS0 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 ISOAEC Directive
21、s, Part 3. 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 element
22、s of this International Standard may be the subject of patent rights. IS0 shall not be held responsible for identifying any or all such patent rights. International Standard IS0 14272 was prepared in collaboration with the International Institute of Welding, which has been approved by the IS0 Counci
23、l as an international standardizing body in the field of welding. . 111 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN IS0 14272:2001 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN IS0 14272:2001 Specimen dimen
24、sions and procedure for cross tension testing resistance spot and embossed projection welds 1 Scope This 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
25、 0,5 mm to 3 mm, where the welds have a maximum diameter of 7dt (where t is the sheet thickness in mm). The object of cross tension testing is to determine the tensile force that the test specimen can sustain. 2 Normative reference The following normative document contains provisions which, through
26、reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of
27、applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IS0 and IEC maintain registers of currently valid International Standards. IS0 7500-1 , Mefallic maferials - Verificafion
28、 of sfafic uniaxial fesfing machines - Parf 1: Tensionlcompression fesfing machines - Verificafion and calibrafion of fhe force-measuring sysfem. 3 Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 3.1 cross tension force maximum force
29、obtained from the test 3.2 plug diameter (plug failure) mean diameter of the plug dP See Figure 1 a). 3.3 weld diameter d (partial plug failure) mean diameter of the fused zone measured at the interface omitting the corona bond area and the maximum diameter of the plug component of the failure See F
30、igure 1 a). NOTE Measurement of the minimum diameter of the plug component should be quoted separately. 1 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN IS0 14272:2001 3.4 weld diameter d (interface failure) mean diameter of the fused zone measured at the
31、 interface, omitting the corona bond area See Figure 1 b). Key 1 Symmetrical 2 Asymmetrical 3 Partial a d = d, = (dl + d2)/2 d = (dl + d2)/2 and d, = (d2 + d3)/2 a) Weld with plug (slug) failure 2 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN IS0 14272:2
32、001 3 3 Key 1 Sheared nugget 2 Corona bond zone 3 Nugget a Diameter of the corona. Diameter of the nugget. b) Weld with interface failure, d d, Figure 1 - Measurement of weld size 4 Test specimen Test specimen configuration and dimensions are shown in Figure 2 a). Figure 2 b) illustrates an example
33、of a jig which can be used for welding the two sheets. Two punched strips are placed at right angles to each other, held in the jig, and welded together. The minimum number of specimens tested shall be eleven. 5 Test equipment and testing procedure The specimen is held in clamps as shown in Figure 3
34、 and pulled apart in a tensile testing machine which satisfies the requirements of IS0 7500-1. The cross tension force shall be measured during testing and the weld diameter determined from the broken test specimen. All tests shall be carried out at room temperature. 3 COPYRIGHT European Committee f
35、or StandardizationLicensed by Information Handling ServicesEN IS0 14272:2001 Key 1 Weld Key 1 Jig 2 Specimen 3 Welding electrode - I I 50 O l+1 Dimensions in millimetres “! O +I O z U? O0 I O a) Cross tension specimen - 10,05 I 100 10.05 I I I 160 b) Cross tension specimen in welding jig Figure 2 -
36、Cross tension test COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN IS0 14272:2001 Dimensions in millimetres i I 150 . I I W Key 1 Clamping screw MI2 x 43LG Figure 3 - Cross tension specimen in testing clamps 5 COPYRIGHT European Committee for Standardizati
37、onLicensed by Information Handling ServicesEN IS0 14272:2001 6 Testreport The test report shall contain the followiing information: a) the welding process; b) the welding conditions and equipment; c) the material and its condition; d) the dimensions of the test specimens; e) f) the type of failure;
38、individual values, mean value and standard deviation of the cross tension force in kN; g) individual values, mean value and standard deviation of the weld diameter; h) special remarks if any. A load-elongation diagram shall be constructed in order to give information on the deformation of the test s
39、pecimen. An example of such a diagram is shown in Figure 4. 6 COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesEN IS0 14272:2001 1 z Y U- m O Type of fracture d“ Welding time mm cycles a Plug failure in parent metal 8,1 18 O 2 3 5 Plug failure in HAZ (heat aff
40、ected zone) 7,8 52 I ntetface failure 8,1 18 10 15 20 Eiongation, mm 41 I ntetface failure I 82 I 18 I a I cycle = 0,02 s. I Figure 4 - Typical load-elongation curves of spot welded joints made on 2 mm thick steel sheets 7 COPYRIGHT European Committee for StandardizationLicensed by Information Handl
41、ing ServicesEN IS0 14272:2001 Bibliograph y I IS0 14329?), Welding - Desfrucfive fesfing of welds - Failure types and geomefric measuremenfs for resisfance spof, seam and projecfion welds. 1) To be published. 8 COPYRIGHT European Committee for StandardizationLicensed by Information Handling Services
42、EN IS0 14272:2001 Annex ZA (normative) Normative references to international publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in
43、 the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of -any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred
44、to applies (including amendments). NOTE Where an International Publication has been modified by common modifications, indicated by (mod.), the relevant EN/HD applies. Publication Yearm - EN Year IS0 7500-1 1999 Metallic materials - Verification of EN IS0 7500-1 1999 static uniaxial testing machines
45、- Part 1 : Tension/compression testing machines COPYRIGHT European Committee for StandardizationLicensed by Information Handling ServicesBS EN IS0 14272:2001 B SI 389 Chiswick High Road London W4 4AL BSI is the independent national body responsible for preparing British Standards. It presents the UK
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