BS EN ISO 14324-2003 Resistance spot welding - Destructive tests of welds - Method for the fatigue testing of spot welded joints《电阻点焊 焊接有损试验 点焊接头的疲劳试验方法》.pdf

1、BRITISH STANDARD BS EN ISO 14324:2003 Incorporating Corrigendum No. 1 Resistance spot welding Destructive tests of welds Method for the fatigue testing of spot welded joints The European Standard EN ISO 14324:2003 has the status of a British Standard ICS 25.160.40 BS EN ISO 14324:2003 This British S

2、tandard was published under the authority of the Standards Policy and Strategy Committee on 18 July 2003 BSI 17 October 2003 ISBN 0 580 42270 4 National foreword This British Standard is the official English language version of EN ISO 14324:2003. It is identical with ISO 14324:2003. The UK participa

3、tion in its preparation was entrusted to Technical Committee WEE/2, Welding tests, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publ

4、ications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the ne

5、cessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the in

6、terpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO ti

7、tle page, pages ii to iv, pages 1 to 10, the Annex ZA page and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 14763 Corrigendum No. 1 17 October 2003 Corrected EN ISO foreword p

8、age and Incorporation of the Annex ZA pageEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO14324 July2003 ICS25.160.40 Englishversion ResistancespotweldingDestructivetestsofweldsMethod forthefatiguetestingofspotweldedjoints(ISO14324:2003) SoudageparrsistanceEssaisdestructifsdessoudures Mthodepour

9、lesessaisdefatiguesurassemblages soudsparpoints(ISO14324:2003) WiderstandspunktschweienZerstrendePrfungvon SchweiungenSchwingfestigkeitsprfungvon Punktschweiverbindungen(ISO14324:2003) ThisEuropeanStandardwasapprovedbyCENon5June2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhi

10、chstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English

11、,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hung

12、ary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyf

13、ormandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO14324:2003ECORRECTED20030924 Foreword Thisdocument(ENISO14324:2003)hasbeenpreparedbyTechnicalCommitteeISO/TC44 “Weldingandalliedprocesses“incollaborationwithTechnicalCommitteeCEN/TC121 “Welding“,thesecretariatofwhichisheldbyDS. Thi

14、sEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationof anidenticaltextorbyendorsement,atthelatestbyJanuary2004,andconflictingnational standardsshallbewithdrawnatthelatestbyJanuary2004. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsof thefollow

15、ingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerlandand theUnitedKingdom. Endorsementnotice ThetextofISO14324:2003hasbeena

16、pprovedbyCENasENISO14324:2003withoutany modifications. NOTENormativereferencestoInternationalStandardsarelistedinAnnexZA(normative). ENISO14324:2003 Reference number ISO 14324:2003(E) OSI 3002INTERNATIONAL STANDARD ISO 14324 First edition 2003-07-01 Resistance spot welding Destructive tests of welds

17、 Method for the fatigue testing of spot welded joints Soudage par rsistance Essais destructifs des soudures Mthode pour les essais de fatigue sur assemblages souds par points ENISO14324:2003IS:42341 O3002(E) DPlcsid Fremia ihTs PDF file mya ctnoian emdebt dedyfepcaes. In ccacnadrow eitA hebods licne

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22、47 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o gro We bwww.is.o groii ISO 3002 Allr ihgtsser edevrENISO14324:2003IS:42341 O3002(E) I SO 3002 All irhgts seredevr iiiContents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 Terms and definitions. 1 4 Test specimens . 3 4.1 Shape and dime

23、nsions. 3 4.2 Test sheets 5 4.3 Fabrication of test specimen . 5 5 Testing machine 5 6 Test methods. 5 6.1 Test jig 5 6.2 Clamping of test specimens 5 6.3 Test procedure 8 6.4 Termination of test 8 6.5 Determination of L-N data. 9 7 Analysis and presentation of test results. 10 8 Test report 10 ENIS

24、O14324:2003IS:42341 O3002(E) iv I SO 3002 All irhgts seredevrForeword 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 commi

25、ttees. 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 I

26、nternational 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 Internationa

27、l 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

28、 subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 14324 was prepared in collaboration with the International Institute of Welding which has been approved by the ISO Council as an international standardizing body in

29、the field of welding. ENISO14324:2003INTENRATIONAL TSANDADR IS:42341 O3002(E)I SO 3002 All irhgts seredevr 1Resistance spot welding Destructive tests of welds Method for the fatigue testing of spot welded joints 1 Scope This International Standard specifies test specimens and procedures for fatigue

30、testing spot welds, at ambient conditions, under repeated tensile loading to produce either shear or cross-tension loading of the spot weld, in steel of sheet thicknesses of 0,5 mm to 6 mm. The test results are not, in general, directly applicable to the fatigue behaviour of a spot-welded component

31、or structure. This procedure can be used for other materials provided proper test conditions (e.g., heating) have been determined. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. F

32、or undated references, the latest edition of the referenced document (including any amendments) applies. ISO 669, Resistance welding Resistance welding equipment Mechanical and electrical requirements ISO 14271, Vickers hardness testing of resistance spot, projection and seam welds (low load and mic

33、rohardness) ISO 14272, Specimen dimensions and procedure for cross tension testing resistance spot and embossed projection welds ISO 14273, Specimen dimensions and procedure for shear testing resistance spot, seam and embossed projection welds ISO 14329, Resistance welding Destructive tests of welds

34、 Failure types and geometric measurements for resistance spot, seam and projection welds 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 cross-tension fatigue test fatigue test that entails the application of a repeated tensile load to the cr

35、oss-tension fatigue test specimen mounted between the jaws of the fatigue-testing machine 3.2 endurance limit maximum load range at which the test specimen can endure a designated number of load cycles without failing 3.3 fatigue life N number of cycles that can be applied at a specified load before

36、 failure occurs ENISO14324:2003IS:42341 O3002(E) 2 I SO 3002 All irhgts seredevr3.4 fatigue limit 1)maximum load range at which the test specimen can endure an infinite number of load cycles 3.5 L-N curve 1)curve drawn by plotting the load range as ordinate and the fatigue life (or fatigue endurance

37、 if the test is terminated before failure) as abscissa, also called the load range-number of load cycles curve NOTE It is normal practice to use logarithmic axes. 3.6 load amplitude L ahalf of the load range L a= 0,5 L 3.7 load ratio R minimum load divided by the maximum load R = L min /L max3.8 loa

38、d range L difference between the maximum and minimum loads L = L max L min3.9 maximum load L maxhighest algebraic value of the repeated load 3.10 mean load L maverage of the maximum and minimum loads L m= 0,5(L max+ L min ) 3.11 minimum load L minlowest algebraic value of the repeated load 3.12 repe

39、ated load L load varying simply and periodically between constant maximum and minimum values 1) Since test results are usually scattered, it may be necessary to establish the L-N curve and the fatigue limit using statistics. ENISO14324:2003IS:42341 O3002(E) I SO 3002 All irhgts seredevr 33.13 shear

40、fatigue test fatigue test that entails the application of a repeated tensile load (hereafter called the load) to the shear fatigue test specimen mounted between clamping jaws of the fatigue-testing machine 3.14 test sheets metal sheets for spot welding 3.15 test specimen spot welded test sheets 4 Te

41、st specimens 4.1 Shape and dimensions 4.1.1 Shear fatigue test Specimen width b, overlap a, and free length between clamps l fof the test plates and test specimen used in the shear fatigue test shall be as shown in Figure 1 and Table 1. For joints between plates of different thickness, the dimension

42、s given refer to the thinner plate. Shim plates of appropriate thickness should be used to centre the load. Key 1 shim plate NOTE Clamping length l cshould exceed specimen width b. aSpot weld Figure 1 Design of shear fatigue test specimen (t 1u t 2 ) ENISO14324:2003IS:42341 O3002(E) 4 I SO 3002 All

43、irhgts seredevrTable 1 Dimensions of shear fatigue test specimens Dimensions in millimetres Thickness Specimen width Overlap Free length between clamps t 1b a l f0,5 u t 1u 1,5 45 0,5 35 160 1,5 t 1u 3 60 0,5 45 200 3 t 1u 6 90 0,8 60 240 4.1.2 Cross-tension fatigue test Figure 2 shows the design of

44、 the cross-tension fatigue test specimen. Dimensions in millimetres aSpot weld bThrough holes Figure 2 Design of cross-tension fatigue test specimen (t 1u t 2 ) ENISO14324:2003IS:42341 O3002(E) I SO 3002 All irhgts seredevr 54.2 Test sheets 4.2.1 Test sheets may be in the sheared condition but all e

45、dge burrs should be removed. 4.2.2 Care should be taken to ensure that the test sheets are not distorted or bent. Unevenness influences the test results and increases scatter. 4.3 Fabrication of test specimen 4.3.1 When spot-welding the test specimen, a suitable jig should be used to ensure alignmen

46、t of each sheet. The spot weld should be positioned near the centre of the overlapped area, with a tolerance on eccentricity of 0,3 mm for sheet thickness u 3,2 mm or 0,5 mm for sheet thickness 3,2 mm and u 6 mm, in either type of specimen. 4.3.2 In order to prevent bending of the shear fatigue test

47、 specimen when clamping it to the testing machine, either suitable shim plates or offset clamps should be used. The distance between the end of each shim plate and the centre of the spot weld shall be one-half of the value l fgiven in Table 1. 5 Testing machine The testing machine shall have the fol

48、lowing capabilities: a) the clamping jaws of the testing machine shall be capable of securely holding the test specimen or the jig so that it does not slip during testing; moreover, any discrepancy between the centre lines of the jaws shall be minimized; b) it shall be capable of sufficiently withstanding the maximum lo