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1、BRITISH STANDARD BS EN ISO 14327:2004 Resistance welding Procedures for determining the weldability lobe for resistance spot, projection and seam welding The European Standard EN ISO 14327:2004 has the status of a British Standard ICS 25.160.10 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 1
2、9 09:21:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 14327:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 11 June 2004 BSI 11 June 2004 ISBN 0 580 43911 9 National foreword This British Standard is the official English langua
3、ge version of EN ISO 14327:2004. It is identical with ISO 14327:2004. The UK participation in its preparation was entrusted to Technical Committee WEE/29, Resistance welding, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secr
4、etary. Cross-references The British Standards which implement international or European publications 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 Catal
5、ogue or of British Standards Online. This publication does not purport to include all the necessary 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 t
6、he text; present to the responsible international/European 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. Summary of pages This document comprises a fro
7、nt cover, an inside front cover, the EN ISO title page, pages 2 to 17 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. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09
8、:21:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14327 April 2004 ICS 25.160.10 English version Resistance welding - Procedures for determining the weldability lobe for resistance spot, projection and seam welding (ISO 14327:2004) Soudage par
9、 rsistance - Modes opratoires pour la dtermination du domaine de soudabilit pour le soudage par rsistance par points, par bossages et la molette (ISO 14327:2004) Widerstandsschweien - Verfahren fr das Bestimmen des Schweibereichsdiagramms fr das Widerstandspunkt-, Buckel- und Rollennahtschweien (ISO
10、 14327:2004) This European Standard was approved by CEN on 17 December 2003. 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 bibli
11、ographical references concerning such national standards may be obtained on application to the Central Secretariat 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
12、 a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, L
13、atvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2
14、004 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 14327:2004: E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:21:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 14327:2004 (E) 2 Contents page Foreword3 Introdu
15、ction.4 1Scope 5 2Normative references 5 3Terms and definitions6 4Weldability lobe limits .6 5Test equipment 7 5.1Welding electrodes7 5.2Welding machine8 6Welding procedure 8 6.1Spot or projection welding8 6.2Seam welding.9 7Statistical evaluation of test results 10 8Report of test results.10 Biblio
16、graphy17 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:21:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 14327:2004 (E) 3 Foreword This document (EN ISO 14327:2004) has been prepared by Technical Committee CEN/TC 121 “Welding“, the secretariat of which is held by DIN, in collaborat
17、ion with Technical Committee ISO/TC 44 “Welding and allied processes“. 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 October 2004, and conflicting national standards shall be withdrawn at the la
18、test by October 2004. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Irel
19、and, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:21:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 14327:2004 (E) 4 Introduction
20、This European Standard enables the weldability lobe to be determined for resistance spot, projection and seam welding. This standard does not invalidate procedures for the determination of the weldability lobe or their approval documents in current use which complied with the national or Internation
21、al Standards or regulations existing at that time, provided the intent of the technical requirement is satisfied and the specified application, its performance and equipment with which it is performed remain unchanged. When this standard is referenced for contractual purposes, all questions relating
22、 to the specification and implementation of welding procedures should be agreed between the contacting parties at the time of enquiry or at the contract stage. It has been assumed in this standard that the execution of its provisions is entrusted to appropriately trained, skilled and experienced per
23、sonnel. For the quality of welded structures the relevant part of EN ISO 14554 should be applicable. The specification of procedures should follow guidelines as in EN ISO 15609-5. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:21:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 14327:
24、2004 (E) 5 1 Scope This European Standard specifies procedures for determining the weldability lobe for producing quality welds. The tests are used in particular to determine the weldability lobe for coated/uncoated steels, stainless steels and aluminium and its alloys but may also be used for other
25、 metallic materials. The aim of this procedure is to allow determination of the range of welding parameters which give rise to an acceptable weld quality as defined within precise limits. The procedure can be used to determine: a) The influence of electrode material, electrode shape and dimensions o
26、n the available welding range for a particular material and welding machine. b) The influence of material type and thickness on the available welding range when using a particular combination of welding electrodes and welding machine. c) The influence of welding machine type, or electrode cooling on
27、 the available welding range for a particular material using a particular electrode shape. d) The available welding range in a production situation. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative reference
28、s are cited at the appropriate places in 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 lat
29、est edition of the publication referred to applies (including amendments). EN ISO 14329:2003, Resistance welding Destructive tests of welds Failure types and geometric measurements for resistance spot, seam and projection welds (ISO 14329:2003). EN ISO 15609-5:2004, Specification and qualification o
30、f welding procedures for metallic materials Welding procedure specification Part 5: Resistance welding (ISO 15609-5:2004). ISO 669:2000, Resistance welding Resistance welding equipment Mechanical and electrical requirements. ISO 693, Dimensions of seam welding wheel blanks. ISO 5182, Welding Materia
31、ls for resistance welding electrodes and ancillary equipment. EN 25184, Straight resistance spot welding electrodes (ISO 5184:1979). EN 25821, Resistance spot welding electrode caps (ISO 5821:1979). ISO 5830, Resistance spot welding Male electrode caps. EN 28167, Projections for resistance welding (
32、ISO 8167:1989). ISO/DIS 14373, Resistance welding Procedure for spot welding of uncoated and coated low carbon steels. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:21:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 14327:2004 (E) 6 3 Terms and definitions For the purposes of this E
33、uropean Standard, the terms and definitions given in ISO 669:2000 and EN ISO 14329:2003, and the following apply. NOTEFurther definitions are given in ISO/DIS 17657-1 (see Bibliography) weldability lobe welding current domain allowing the production without splash of spot welds of a diameter equal o
34、r more than a pre-determined value under either constant welding time or constant electrode force 4 Weldability lobe limits The weldability lobe will define the available welding conditions in terms of: a) Weld current and time at a constant electrode force. Or: b) Weld current and electrode force a
35、t a constant weld time. In the case of resistance seam welding, welding speed (m/min) is used instead of weld time. To meet these requirements, the weldability lobes can be a two dimensional plot as indicated in a) and b) above or a three dimensional plot indicating the inter relationship between we
36、ld time (welding speed in the case of seam welding), welding current and electrode force. For the purpose of this standard, the lower and upper limits of the weldability lobe should be as follows: 1)Lower limit This equates to the welding conditions which result in a weld diameter equal to 3,5 t whe
37、re t equal sheet thickness in mm. In the case of two dissimilar thicknesses, “t“ refers to the thinner sheet. NOTE 1A limit other than 3,5 t may be acceptable by agreement between contracting parties provided the strength of the weld or welded assembly satisfy the necessary design requirements. NOTE
38、 2Guidelines for measuring weld diameter for both plug and interface failure are given in EN ISO 14329. The weld diameter should be measured from a broken specimen, e. g. peel test. NOTE 3In 3 or 4 thickness welding the minimum of the diameter specified will depend on the position of the thinner she
39、ets from design process requirements. 2)Upper limit This corresponds to the welding conditions which give rise to interfacial splash in the case of spot and projection welding. In seam welding the limit corresponds to surface splash or surface cracking in the weld or heat-affected zone areas. NOTE 4
40、Alternative criteria may be specified, such as the minimum value of the shear force that the weld can withstand based on recommendations made in ISO or product standards in the case of coated/uncoated steels. Minimum surface indentation or the amount of weld nugget penetration can be specified by ag
41、reement. In the case of resistance seam welding, other intermediate limits may be chosen based on alternative weld sizes or the onset of surface cracking. The use of such limits depend on the application being welded and should be by agreement between contracting parties. Typical weldability lobes a
42、re shown in Figure 1. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 09:21:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 14327:2004 (E) 7 5 Test equipment 5.1 Welding electrodes 5.1.1General The welding electrodes shall conform to alloys specified in ISO 5182 unless otherwise agreed b
43、etween contracting parties. Electrodes should be of sufficient cross-sectional area and strength to carry the welding current and electrode force without overheating, deformation or excessive deflection. 5.1.2Spot welding In the case of spot welding, the electrode dimensions shall conform to the req
44、uirements of ISO 5184, ISO 5821 and ISO 5830 where applicable. Alternative electrode shapes and dimensions may be used by agreement between contracting parties. Pre-conditioned electrodes should be used for each individual weldability lobe determined. Electrodes shall be pre-conditioned as summarise
45、d below. Where appropriate, dimensions of the water cooling holes and pipes shall comply with the relevant requirements of the appropriate ISO standard. NOTEIt is recommended that the water flow should be a minimum of 4 l/min per electrode although, higher flow rates are recommended when welding coa
46、ted steels. The water cooling feed tube should be arranged to impinge the water onto the back face of the electrode. The distance between the back and the working face of the electrode should not exceed the values given in the appropriate ISO standard. Separate water supplies should be used for top
47、and bottom electrodes and should be independent of other cooling circuits. It is recommended that the inlet water temperature should not exceed 20 C (293 K) and the outlet temperature should not exceed 30 C (303 K) (except when water cooling temperature is the parameter being studied). Higher inlet/
48、outlet water temperatures can be used by agreement between contracting parties. Both top and bottom electrodes shall be properly aligned prior to commencement of the test. The electrode face of the top and bottom electrodes should be parallel to each other and have an electrode diameter that is with
49、in the specified tolerances of the diameter called for any given sheet thickness or that agreed between the contracting parties. Alignment of electrodes should be checked using carbon imprints. When welding uncoated/coated steels and stainless steels, the welding electrodes should be pre-conditioned for 50 welds prior to determining the weldability lobe. Pre-conditioning should be carried out at a nominal weld time of approximately e. g. 8 cycles at 50 Hz on uncoated sheet