1、BRITISH STANDARD BS EN 28167:1992 ISO8167:1989 Specification for Projections for resistance welding The European Standard EN28167:1992 has the status of a British StandardBSEN28167:1992 This British Standard, having been prepared under the direction of the Welding Standards Policy Committee, was pub
2、lished under the authority of the Standards Board and comes into effect on 15 August 1992 BSI 03-1999 The following BSI references relate to the work on this standard: Committee reference WEE/29 Draft for comment87/78458DC ISBN 0 580 21097 9 Cooperating organizations The European Committee for Stand
3、ardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoim
4、isliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg I
5、nspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normal
6、isation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN28167:1992 BSI 03-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN28167 3 National annex NA (informative) Committees responsi
7、ble Inside back cover National annex NB (informative) Cross-reference Inside back coverBSEN28167:1992 ii BSI 03-1999 National foreword This British Standard has been prepared under the direction of the Welding Standards Policy Committee and is the English language version of EN28167:1992, Projection
8、s for resistance welding, published by the European Committee for Standardization (CEN).It is identical with ISO8167:1989 published by the International Organization for Standardization (ISO). It supersedes Appendix B of BS2630:1982, which will be amended. EN28167was produced as a result of internat
9、ional discussion in which the UK took an active part. 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
10、obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theENtitle page, pages2to6,an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amen
11、dment table on theinside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN28167 May1992 UDC6210791.763.2 Descriptors: Welding, resistance welding, projections, dimensions, designation English version Projections for resistance welding (ISO8167:1989) Bossages pour le soudage par rsista
12、nce (ISO8167:1989) Buckel zum Widerstandsschweien (ISO8167:1989) This European Standard was approved by CEN on1992-05-22. 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 witho
13、ut any alteration. Up-to-date lists and bibliographical 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 ma
14、de by translation under the responsibility of 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy
15、, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart36, B-1050Brussels 1992Copyright reserved to CEN members Ref. No. E
16、N28167:1992EEN28167:1992 BSI 03-1999 2 Foreword In September1991, CEN Technical Board decided to submit the International Standard ISO8167:1989 “Projections for resistance welding” to the formal vote procedure. The result was positive and the standard is now adopted as a European Standard. National
17、standards identical to this European Standard shall be published at the latest by1992-11-30and conflicting national standards shall be withdrawn at the latest by1992-11-30. According to the CEN/CENELEC Common Rules the following countries are bound to implement this European Standard: Austria, Belgi
18、um, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. Contents Page Foreword 2 1 Scope 3 2 Normative reference 3 3 Dimensions 3 4 Designation 3 Annex A (informative) Relationship between sheet
19、thickness and projection diameter 4 Annex B (informative) Example of tool for forming projection 5 Figure 1 Projection for resistance welding 3 Figure B.1 Tool dimensions 5 Table 1 Dimensions 3 Table A.1 Groups of projection diameters 4EN28167:1992 BSI 03-1999 3 1 Scope This International Standard s
20、pecifies the characteristics and dimensions of projections for resistance welding; it also includes the appropriate design and dimensions for tools (see Annex B) The projections may be used on either hot-rolled or cold-rolled, uncoated mild steel, of conventional welding quality and up to3mm thick,
21、as single projections, in multiples or as a group of multiples. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are
22、 subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO286-1:1988,
23、 ISO System of limits and fits Part1: Bases of tolerances, deviations and fits. 3 Dimensions The dimensions shall be as specified in Figure 1 and Table 1. The tolerance on the projection diameter, d 1,shall be mm; the tolerance on the projection height, a, shall be 10%, except in the case where a nu
24、mber of projections are to be welded in one operation, when the height of the individual projections on any of the components comprising the assembly shall not vary by more than5% from one another. NOTE 1The height, a, is determined by the punch stroke. NOTE 2If sheet thicknesses are different, the
25、projection should be manufactured in the thicker sheet with the dimensions of the thinner sheet. Table 1 Dimensions 4 Designation Projections (P) covered by this International Standard shall be designated using the following information in the order given: a) the description (i.e.“Projection”); b) t
26、he reference of this International Standard; c) the projection diameter, d 1 , in millimetres. Example: A projection with a diameter, d 1 , of2,5mm shall be designated as follows: Projection ISO8167-P2,5+ 01 , 0 * See Annex A for relationship between sheet thickness, t, and projection diameter, d 1
27、. Figure 1 Projection for resistance welding Dimensions in millimetres d 1 a +0,1 0 a b d 2 1,6 0,4 0,5 2 0,5 0,63 2,5 0,63 0,8 3,2 0,8 1 4 1 1,25 5 1,25 1,6 6,3 1,6 2 8 2 2,5 10 2,5 3,2 a The diameter of the forming tool, d 3 , shall be greater than or equal to d 1;an example of a forming tool is g
28、iven in Annex B. b See clause3 for tolerance on the height, a.EN28167:1992 4 BSI 03-1999 Annex A (informative) Relationship between sheet thickness and projection diameter For the various applications and the required strength determined by weld strength and material properties, it is recommended th
29、at, according to the sheet thickness, the following three different groups of projection diameters (see Table A.1) be adopted: For easy designation it may be convenient to reach agreement on the groups in national or company standards. Table A.1 Groups of projection diameters Group A Comprises small
30、 size projections for applications where space is limited or minimum marking is required; Group B Projections for standard applications which usually need more space and leave larger marks than Group A projections; Group C Large size projections for high strength applications, where space or shape l
31、imits the application or use of multi-projections; normally used with high strength steels. Dimensions in millimetres Sheet thickness t Projection diameter, d 1 Group A Group B Group C t 0,5 1,6 2 2,5 0,5 t 0,63 2 2,5 3,2 0,63 t 1 2,5 3,2 4 1 t 1,6 3,2 4 5 1,6 t 2,5 4 5 6,3 2,5 t 3 5 6,3 8EN28167:19
32、92 BSI 03-1999 5 Annex B (informative) Example of tool for forming projection NOTE? d 3 ? d 1 ; for other dimensions, see Table 1. All unspecified dimensions to be produced within the relevant tolerances in accordance with ISO286-1. Figure B.1 Tool dimensions6 blankBSEN28167:1992 BSI 03-1999 Nationa
33、l annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Welding Standards Policy Committee (WEE/-) to Technical Committee WEE/29upon which the following bodies were represented: British Steel Industry Railway
34、Industry Association of Great Britain Society of Motor Manufacturers and Traders Limited Welding Institute Welding Manufacturers Association (BEAMA Ltd.) Co-opted members National annex NB (informative) Cross-reference Publication referred to Corresponding British Standard a ISO286-1:1988 BS4500 ISO
35、 Limits and fits Part1 General tolerances and deviations Section1.1:1990 Specification for bases of tolerances, deviations and fits (Identical) a Where no identical or technically equivalent British Standard exists, the user is directed to the relevant European or international standard, copies of w
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