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1、 Reference number ISO 14327:2004(E) ISO 2004 INTERNATIONAL STANDARD ISO 14327 First edition 2004-04-01 Resistance welding Procedures for determining the weldability lobe for resistance spot, projection and seam welding Soudage par rsistance Modes opratoires pour la dtermination du domaine de soudabi
2、lit pour le soudage par rsistance par points, par bossages et la molette Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 20:50:57 MDTNo reproduction or networking permitted witho
3、ut license from IHS -,-,- ISO 14327:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer perfor
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6、cretariat at the address given below. ISO 2004 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the
7、address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2004 All rights reserved Copyright International Organization
8、 for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 20:50:57 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14327:2004(E) ISO 2004 All rights reserved iii Foreword ISO (the International
9、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 interested in a subject for which a technical committee has been esta
10、blished 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 Electrotechnical Commission (IEC) on all matters of electrotechnical standardiza
11、tion. 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 International Standards adopted by the technical committees are circulated to the member bodies for votin
12、g. 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 subject of patent rights. ISO shall not be held responsible for identifying any or all such
13、patent rights. ISO 14327 was prepared by the European Committee for Standardization (CEN) in collaboration with Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 10, Unification of requirements in the field of metal welding, in accordance with the Agreement on technical co
14、operation between ISO and CEN (Vienna Agreement). Throughout the text of this document, read “.this European Standard.” to mean “.this International Standard.”. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545
15、001 Not for Resale, 04/19/2007 20:50:57 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14327:2004(E) iv ISO 2004 All rights reserved Contents page Forewordv Introductionvi 1Scope 1 2Normative references 1 3Terms and definitions2 4Weldability lobe limits .2 5Test equipm
16、ent 3 5.1Welding electrodes3 5.2Welding machine4 6Welding procedure 4 6.1Spot or projection welding4 6.2Seam welding.5 7Statistical evaluation of test results 6 8Report of test results.6 Bibliography13 Copyright International Organization for Standardization Provided by IHS under license with ISO Li
17、censee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 20:50:57 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14327:2004(E) ISO 2004 All rights reserved v Foreword This document (EN ISO 14327:2004) has been prepared by Technical Committee CEN/TC 121 “
18、Welding“, the secretariat of which is held by DIN, in collaboration 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,
19、 and conflicting national standards shall be withdrawn at the latest 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, E
20、stonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Copyright International Organization for Standardization Provided by IHS under l
21、icense with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 20:50:57 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14327:2004(E) vi ISO 2004 All rights reserved Introduction This European Standard enables the weldability lobe to be determ
22、ined 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 International Standards or regulations existing at that time, provided the
23、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 to the specification and implementation of welding procedures s
24、hould 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 personnel. For the quality of welded structures the relevant part o
25、f EN ISO 14554 should be applicable. The specification of procedures should follow guidelines as in EN ISO 15609-5. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 20:50:57 MDTNo
26、 reproduction or networking permitted without license from IHS -,-,- ISO 14327:2004(E) ISO 2004 All rights reserved 1 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 lo
27、be for coated/uncoated steels, stainless steels and aluminium and its alloys but may also be used for other 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 p
28、rocedure can be used to determine: a) The influence of electrode material, electrode shape and dimensions on 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 o
29、f welding electrodes and welding machine. c) The influence of welding machine type, or electrode cooling on 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 Standar
30、d incorporates by dated or undated reference, provisions from other publications. These normative references 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 t
31、his European Standard only when incorporated in it by amendment or revision. For undated references the latest 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 resistan
32、ce spot, seam and projection welds (ISO 14329:2003). EN ISO 15609-5:2004, Specification and qualification of welding procedures for metallic materials Welding procedure specification Part 5: Resistance welding (ISO 15609-5:2004). ISO 669:2000, Resistance welding Resistance welding equipment Mechanic
33、al and electrical requirements. ISO 693, Dimensions of seam welding wheel blanks. ISO 5182, Welding Materials 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 5821:1
34、979). ISO 5830, Resistance spot welding Male electrode caps. EN 28167, Projections for resistance welding (ISO 8167:1989). ISO/DIS 14373, Resistance welding Procedure for spot welding of uncoated and coated low carbon steels. Copyright International Organization for Standardization Provided by IHS u
35、nder license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 20:50:57 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14327:2004(E) 2 ISO 2004 All rights reserved 3 Terms and definitions For the purposes of this European Standard, the
36、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 or more than a pre-dete
37、rmined 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 at a constant weld time
38、. 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 weld time (welding speed
39、 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 where t equal sheet thick
40、ness 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 2Guidelines for measu
41、ring 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 sheets from design proces
42、s 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 4Alternative criteria m
43、ay 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 agreement. In the case o
44、f 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 are shown in Figure 1.
45、Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 20:50:57 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14327:2004(E) ISO 2004 All rights reserved
46、3 5 Test equipment 5.1 Welding electrodes 5.1.1General The welding electrodes shall conform to alloys specified in ISO 5182 unless otherwise agreed between contracting parties. Electrodes should be of sufficient cross-sectional area and strength to carry the welding current and electrode force witho
47、ut overheating, deformation or excessive deflection. 5.1.2Spot welding In the case of spot welding, the electrode dimensions shall conform to the requirements of ISO 5184, ISO 5821 and ISO 5830 where applicable. Alternative electrode shapes and dimensions may be used by agreement between contracting
48、 parties. Pre-conditioned electrodes should be used for each individual weldability lobe determined. Electrodes shall be pre-conditioned as summarised 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 coated steels. The water