1、September 2007DEUTSCHE NORM English price group 12No part of this standard 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 25.160.10!$I0m“13813
2、74www.din.deDDIN EN ISO 16432Resistance welding Procedure for projection welding of uncoated and coated low carbonsteels using embossed projection(s) (ISO 16432:2006)English version of DIN EN ISO 16432:2007-09Widerstandsschweien Verfahren zum Buckelschweien von niedriglegierten Sthlen mit oder ohne
3、metallischemberzug (ISO 16432:2006)Englische Fassung DIN EN ISO 16432:2007-09www.beuth.deDocument comprises 23 pages11.07DIN EN ISO 16432:2007-09 2 National foreword This standard has been prepared by the International Institute for Welding (IIW). The responsible German body involved in its preparat
4、ion was the Normenausschuss Schweitechnik (Welding Standards Committee), Technical Committee NA 092-00-12 AA Widerstandsschweien (DVS AG V 3). The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 669 DIN ISO 669 ISO 3573 DIN EN 10111 ISO 357
5、4 DIN EN 10130 ISO 3575 DIN EN 10327 ISO 4950-1 DIN EN 10025-1 ISO 4950-2 DIN EN 10025-3 ISO 5002 DIN EN 10152 ISO 5182 DIN ISO 5182 ISO 8167 DIN EN 28167 ISO 10447 DIN EN ISO 10447 ISO 14270 DIN EN ISO 14270 ISO 14272 DIN EN ISO 14272 ISO 14273 DIN EN ISO 14273 ISO 14329 DIN EN ISO 14329 ISO 15609-
6、5 DIN EN ISO 15609-5 ISO 15614-12 DIN EN ISO 15614-12 ISO 17653 DIN EN ISO 17653 National Annex NA (informative) Bibliography DIN EN 10025-1, Hot rolled products of structural steels Part 1: General technical delivery conditions DIN EN 10025-3, Hot rolled products of structural steels Part 3: Techni
7、cal delivery conditions for normal-ized/normalized rolled weldable fine grain structural steels DIN EN 10111, Continuously hot-rolled low carbon steel sheet and strip for cold forming Technical delivery conditions DIN EN 10130, Cold rolled low carbon steel flat products for cold forming Technical de
8、livery conditions DIN EN 10152, Electrolytically zinc coated cold rolled steel flat products for cold forming Technical delivery conditions DIN EN 10327, Continuously hot-dip coated strip and sheet of low carbon steels for cold forming Technical delivery conditions DIN EN ISO 16432:2007-09 3 DIN EN
9、28167, Projections for resistance welding DIN EN ISO 10447, Resistance welding Peel and chisel testing of resistance spot and projection welds DIN EN ISO 14270, Specimen dimensions and procedure for mechanized peel testing resistance spot, seam and embossed projection welds DIN EN ISO 14272, Specime
10、n dimensions and procedure for cross tension testing resistance spot and embos-sed projection welds DIN EN ISO 14273, Specimen dimensions and procedure for shear testing resistance spot, seam and embos-sed projection welds DIN EN ISO 14329, Resistance welding Destructive tests of welds Failure types
11、 and geometric measure-ments for resistance spot, seam and projection welds DIN EN ISO 15609-5, Specification and qualification of welding procedures for metallic materials Welding procedure specification Part 5: Resistance welding DIN EN ISO 15614-12, Specification and qualification of welding proc
12、edures for metallic materials Welding procedure test Part 12: Spot, seam and projection welding DIN EN ISO 17653, Destructive tests on welds in metallic materials Torsion test of resistance spot welds DIN ISO 669, Resistance welding Resistance welding equipment Mechanical and electrical requirements
13、 DIN ISO 5182, Welding Materials for resistance welding electrodes and ancillary equipment DIN EN ISO 16432:2007-09 4 This page is intentionally blank EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 16432June 2007ICS 25.160.10English VersionResistance welding - Procedure for projection welding
14、 ofuncoated and coated low carbon steels using embossedprojection(s) (ISO 16432:2006)Soudage par rsistance - Mode opratoire de soudage parbossage(s) embouti(s) des aciers bas carbone revtus etnon revtus (ISO 16432:2006)Widerstandsschweien - Verfahren zum Buckelschweienvon niedriglegierten Sthlen mit
15、 oder ohne metallischemberzug (ISO 16432:2006)This European Standard was approved by CEN on 19 May 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration.
16、Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationun
17、der the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, H
18、ungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre:
19、 rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 16432:2007: EContents Page 1 2 3 4 5 5.1 5.2 5.3 6 6.1 6.1.1 6.1.2 6.2 6.2.1 6.2.2 6.2.3 6.3 7 7.1 7.2 7.3 7.3.1 7.3.2 7.3.3 7.3.4 7.3.5 8
20、8.1 8.2 8.2.1 8.2.2 8.2.3 8.2.4 8.3 8.4 9 9.1 9.2 10 Annex B (informative) Relationship between sheet thickness and projection diameter (derived EN ISO 16432:2007 (E)2Electrode cooling 10 Location of components (tooling). 10 Weld assessment Type tests 10 Tooling design considerations 10 General. 10
21、Weld diameter . 11 Weld strength 11 Test requirements. 11 Weld fracture mode 11 Visual and metallographic examination . 12 Distortion . 12 General. 12 Weld appearance Surface condition 12 Weld assessment Routine tests . 12 Frequency of testing. 13 Repair of non-conforming assemblies . 13 Electrode i
22、nserts. 9 Design of electrode assembly. 9 Welding equipment. 9 Electrode assembly (tooling). 9 Contact face 9 Welding machine 9 Ancillary manufacturing considerations 9 Dissimilar sheet thickness. 8 Projection dimensions . 8 General. 7 Component design and manufacture . 7 Multi-weld arrays. 9 Genera
23、l. 8 Placement of projections . 7 Component design . 7 Surface conditions 7 Introduction 4 Steel grades. 7 Materials 6 Terms and definitions. 6 Scope . 5 Foreword 3 Normative references . 5 Symbols . 6 Form . 6 Annex A (informative) Recommendations for projection welding equipment. 14 from ISO 8167)
24、 15 Annex C (informative) Typical projection welding conditions. 16 Bibliography . 19 Annex D (informative) Partial list of steel types applicable to the standard 18 EN ISO 16432:2007 (E) 3 Foreword The text of ISO 16432:2006 has been prepared by IIW, International Institute of Welding, and has been
25、 taken over as EN ISO 16432:2007 by Technical Committee CEN/TC 121 “Welding” 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 December 2007, and conflicting
26、 national standards shall be withdrawn at the latest by December 2007. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estoni
27、a, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 16432:2006 has been approved by CEN as a
28、EN ISO 16432:2007 without any modification. Introduction Requests for official interpretations of provisions in this standard should be made in writing and sent to the ISO Central Secretariat who will forward them to the IIW Secretariat for an official response. EN ISO 16432:2007 (E)41 Scope This In
29、ternational Standard specifies requirements for embossed-resistance-projection welding in the fabrication of assemblies of uncoated and metallic coated low carbon steel comprising two thicknesses of metal, where the maximum single sheet thickness of components to be welded is within the range 0,4 mm
30、 to 3 mm for the following materials: uncoated steels; hot-dip zinc or iron-zinc alloy (galvannealed) coated steel; electrolytic zinc, zinc-iron, or zinc-nickel coated steel; aluminium coated steel; zinc-aluminium coated steel. Organic-coated or primer-coated steels are not covered by this Internati
31、onal Standard. Guidelines for appropriate welding equipment and projection welding conditions for various coated steels are given in Annexes A to C. These are for guidance only and may need to be adapted to suit the specified service conditions of the fabrication, prevailing production conditions, t
32、ype of welding equipment, mechanical and electrical characteristics of the welding machine, electrode configuration, and material. These requirements shall be taken from the relevant welding procedure specification for the application or procedure, where these exist. 2 Normative references The follo
33、wing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 669, Resistance welding Resistance welding equipment M
34、echanical and electrical requirements ISO 5182:1991, Welding Materials for resistance welding electrodes and ancillary equipment ISO 8167, Projections for resistance welding ISO 10447, Welding Peel and chisel testing of resistance spot, projection and seam welds ISO 14270, Specimen dimensions and pr
35、ocedure for mechanized peel testing resistance spot, seam and embossed projection welds ISO 14272, Specimen dimensions and procedure for cross tension testing resistance spot and embossed projection welds EN ISO 16432:2007 (E)5ISO 14273, Specimen dimensions and procedure for shear testing resistance
36、 spot, seam and embossed projection welds ISO 14329, Resistance welding Destructive tests of welds Failure types and geometric measurements for resistance spot, seam and projection welds ISO 15609-5, Specification and qualification of welding procedures for metallic materials Welding procedure speci
37、fication Part 5: Resistance welding ISO 15614-12, Specification and qualification of welding procedures for metallic materials Welding procedure test Part 12: Spot, seam and projection welding 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 669 and I
38、SO 14329 and the following apply. 3.1 edge distance minimum distance from the nearest edge of the component to the centre of the weld 3.2 embossed projection projection in a sheet used for welding and produced by mechanical force using a punch to displace a predetermined amount of material into a ca
39、vity NOTE See ISO 8167 for use on different sheet thicknesses. 3.3 projection base diameter diameter of an embossed projection measured at the original surface of the stamped sheet NOTE See ISO 8167. 3.4 weld pitch distance between centres of adjacent projections 4 Symbols Symbol Term Unit d weld di
40、ameter mm dbnominal-projection base diameter mm Psshear strength of weld kN Rmultimate tensile strength of steel MPa t sheet thickness mm 5 Materials 5.1 Form The steel shall be flat rolled, in coils or cut to length, and shall be free of harmful imperfections. EN ISO 16432:2007 (E)65.2 Steel grades
41、 A partial list of steel grades to which this International Standard is applicable is given in Annex D. 5.3 Surface conditions Prior to welding, all surfaces of components to be projection welded shall be free of contaminants such as grease, scale, corrosion products, paint, dirt or excessive pittin
42、g. This condition shall be maintained until the welding process is completed. Uncoated hot-rolled steel shall be in the pickled condition. Certain surface treatments, such as the application of paint primers, rust preventions and oils, may be applied before welding, provided that the coating is unif
43、orm in thickness and it has been demonstrated that consistent welds, conforming to this International Standard, can be obtained. Excessive use of surface pre-treatments may adversely affect electrode life and should therefore be avoided. Coated steels can be supplied with a chromate or phosphate pas
44、sivation treatment. Phosphated mild steel may be used in certain applications. These materials can be projection welded, although the welding parameters outlined in Annex B may require appropriate adjustment. Generally, more care needs to be taken in selecting welding conditions, particularly with m
45、ultiple projections. Materials with thicker coatings are more difficult to weld. 6 Component design and manufacture 6.1 Component design 6.1.1 General The components/joints shall be designed and manufactured to provide adequate matching flange conditions, free from potentially harmful physical defor
46、mations to accommodate the projections used in the welding process. The design shall allow unimpeded collapse of the projections during welding, and provide proper access for the electrodes and any necessary tooling. The procedure shall include provision for reviewing the design as a result of tests
47、, to ensure that compliance with this International Standard is achieved. Single or multiple projection arrays may be specified, provided the appropriate welding practices can be maintained. The design of the assembly to be projection welded shall take into account the process requirements specified
48、 in Clause 7. The shape of both components shall be such that there is proper contact between the projections and the surface to be welded, to allow unimpeded collapse in response to the welding process. 6.1.2 Placement of projections The placement of embossed projections from the edge of a componen
49、t is a function of the projection base diameter (db), and hence the sheet thickness (t). The edge distance shall not be less than 1,25 dbas shown in Figure 1. It should be noted that short edge distances may adversely affect weld quality. In this case, the nominal weld size may need to be specified below the value given in 8.2.1 and allowance for a lower weld strength shall be made in the design (see 8.2.3). The weld pitch (see Figure 1), shall not be less than 4,5 db
