1、 I_ _ - _ -_ _I_ CEN EN*Z8167 9% 3404589 0029405 2Tb M EUROPEAN STANDARD EN 28167 NORME EUROPENNE EUROPISCHE NORM May 1992 UDC 62 10791.763.2 Descriptors: Welding, resistance welding, projections, dimensions, designation English version Projections for resistance welding (IS0 8167 : 1989) Bossages p
2、our le soudage par rsistance (IS0 8167 : 1989) Buckel zum WiderstandsschweiBen (IS0 8167 : 1989) This European Standard was approved by CEN on 1992-05-22. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the sta
3、tus of a national standard without 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
4、vexsion in any other language made 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, Geimany,
5、 Greece, Iceland, Ireland, Italy, 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 Stassart 36, B-1050 Brussels O 1992 Copyrig
6、ht reserved to CEN membeis Ref. No. EN 28167 : 1992 E Page 2 EN 28167 : 1992 Foreword In September 1991, CEN Tecdca Board decidec to submit the International Standard IS0 8167 : 1989 - Projections for resistance welding to the formal vote procedure. The result was positive and the standard is now ad
7、opted as a European Standard. National standards identical to this European Standard shall be published at the latest by 1992-1 1-30 and conflicting national standards shall be withdrawn at the latest by 1992-11-30. According to the CENKENELEC Common Rules the following countries are bound to implem
8、ent this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 3 EN 28167 : 1992 Projections for resistance welding 1 Scope This International Standard sp
9、ecifies the characteristics and dimensions of projections for resistance welding; it also includes the appropriate design and dimensions for tools (see annex 6). The projections may be used on either hot-rolled or cold-rolled, uncoated mild steel, of conventional welding quaiity and up to 3 mm thick
10、 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 a
11、re subject to revision, and parties to agreements based on this International Standard are encourag- ed to investigate the possibility of applying the most recent edi- tion of the standard indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 286-
12、1 : 1988, IS0 System of limits and fits - Part I: 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, dl, shall be 00. mm; the tolerance on the projection height, a, shall be k 10 %, except in
13、the case where a number of projections are to be welded in one operation, when the height of the individual pro- jections on any of the components comprising the assembly shall not vary by more than 5 9 from one another. NOTES 1 2 If sheet thicknesses are different, the projection sh ild be manufact
14、ured in the thicker sheet with the dimensions of the thinner sheet. The height, a, is determined by the punch stroke. * jection diameter, d,. See annex A for relationship between sheet thickness, t, and pro- Figure 1 - Projection for resistance welding Table 1 - Dimensions Dimensions in millimetres
15、0.4 0.5 0,63 0.8 1 1,25 1,6 2 2.5 1) The diameter of the forming tool, 4, shall be greater than or equal to dl; an example of a forming tool is given in annex B. 2) See clause 3 for tolerance on the height, n. 4 Designation Projections (P) covered by this International Standard shall be designated u
16、sing the following information in the order given: a) the description (.e. “Projection“); tj) the reference of this International Standard; c) the projection diameter, dl, in millimetres. Example: A projection with a diameter, d, of 2,5 mm shall be designated as follows: Projection IS0 8167-P2,5 Pag
17、e 4 EN 28167 : 1992 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 that, according to the sheet thickness, the following three different g
18、roups of projection diameters (see table A.l be adopted: - Group A Comprises small 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 projec- tions; -
19、 - Group C Large size projections for high strength applications, where space or shape limits the application or use of multi- projections; normally used with high strength steels. For easy designation it may be convenient to reach agreement on the groups in national or company standards. Table A.l
20、 Groups of projection diameters Dimensions in millimetres Sheet thickness t t 0,5 0,5 t 0,W 0,W t 1 1 t 1,6 1,6 t 4 2,5 2,5 t 3 Projection diameter, d, Group A Group B Group C 1,6 2 23 2 23 3.2 2,s 32 4 32 4 5 4 5 6.3 5 63 8 Page 5 EN 28167 : 1992 Annex B ( informa tive) Example of tool for forming projection Dimension in millimetres I NOTE - 0 d3 0 d,; for other dimensions, see table 1. All unspecified dimensions to be produced within the relevant tolerances in accordance with IS0 286-1. Figure B.l - Tool dimensions
