1、BS ISO 20168:2016Resistance welding Lockingtapers for electrode holdersand electrode capsBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 20168:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 20168:2016.The UK partici
2、pation in its preparation was entrusted to TechnicalCommittee WEE/29, Resistance welding.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for
3、its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 92326 5ICS 25.160.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and
4、Strategy Committee on 30 September 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 20168:2016 ISO 2016Resistance welding Locking tapers for electrode holders and electrode capsSoudage par rsistance Cnes de serrage pour porte-lectrodes et pointes dlectrodesINTERN
5、ATIONAL STANDARDISO20168First edition2016-09-01Reference numberISO 20168:2016(E)BS ISO 20168:2016ISO 20168:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduc
6、ed or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.IS
7、O copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 20168:2016ISO 20168:2016(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Dimensions and tolerances . 24.1 General .
8、24.2 Electrode holders 24.3 Electrode caps 25 Designation 35.1 Electrode holders 35.2 Electrode caps 36 Material 37 Marking 3Bibliography 4 ISO 2016 All rights reserved iiiContents PageBS ISO 20168:2016ISO 20168:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide f
9、ederation 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 established has the right to be represented on that co
10、mmittee. 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 standardization.The procedures used to develop this document
11、and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, P
12、art 2 (see www.iso.org/directives).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 patent rights. Details of any patent rights identified during the development of
13、the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific te
14、rms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee responsible for this document is ISO/TC 44, W
15、elding and allied processes, Subcommittee SC 6, Resistance welding and allied mechanical joining.Requests for official interpretations of any aspect of this document should be directed to the Secretariat of ISO/TC 44/SC 6 via your national standards body. A complete listing of these bodies can be fo
16、und at www.iso.org.iv ISO 2016 All rights reservedBS ISO 20168:2016INTERNATIONAL STANDARD ISO 20168:2016(E)Resistance welding Locking tapers for electrode holders and electrode caps1 ScopeThis document specifies the dimensions and tolerances for electrode holders and of spot welding electrode caps,
17、where a locking taper is used.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the r
18、eferenced document (including any amendments) applies.ISO 5182, Resistance welding Materials for electrodes and ancillary equipmentISO 5821, Resistance welding Spot welding electrode caps3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 17677-1 and the
19、following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp3.1locking tapertaper allowing for a tight fit between an el
20、ectrode holder and the electrode cap as their taper angles differ by 0 2 60, ensuring the electrode cap engagement point is at the skirt of the cap and electrode holderNote 1 to entry: See Figure 1.Note 2 to entry: Traditionally called “Fisher taper”.Note 3 to entry: During welding, the electrode ca
21、p tightens further on the electrode holder.a) Locking taper b) Detailed viewFigure 1 Principle of a locking taper ISO 2016 All rights reserved 1BS ISO 20168:2016ISO 20168:2016(E)4 Dimensions and tolerances4.1 GeneralTable 1 gives the dimensions for three typically used electrode cap and holder sizes
22、: 13 mm, 16 mm and 20 mm.The taper angles of electrode caps and holders are to be verified by the use of certified ring gauges and plugs.4.2 Electrode holdersThe taper of the electrode holders shall be 2 58 54 in accordance with Figure 2.4.3 Electrode capsThe taper of the electrode caps shall be 2 5
23、6 53 in accordance with Figure 2.Keyl1electrode cap locking taper length d1outside diameter of electrode capl2electrode holder locking taper length d2inside diameter of electrode cap (at base of locking taper)l3total length of electrode holder taper d3diameter of electrode holder at base of locking
24、taperFigure 2 Dimensions for electrode holder and electrode cap with locking taper2 ISO 2016 All rights reservedBS ISO 20168:2016ISO 20168:2016(E)Table 1 Tolerances for the dimensions for electrode holders and electrode caps with locking tapersDimensions in millimetresd1d2d3l1l2l3Nominal size of ele
25、ctrode cap and holder+0050, 0005 ,+050, +050, +050,13 10,01 10,21 8,81 8,84 10,3616 12,56 12,75 9,63 9,65 11,1820 15,88 16,08 10,69 10,19 11,715 Designation5.1 Electrode holdersElectrode holders shall be designated in accordance with this document and nominal diameter, d1.EXAMPLE A spot welding elec
26、trode holder, with nominal diameter 20 mm is designated as follows:ISO 20168:2016 - 205.2 Electrode capsElectrode caps shall be designated in accordance with ISO 5821, except the number of this document shall be used to indicate that the cap has a locking taper.EXAMPLE A spot welding electrode cap t
27、ype B0, width d1= 16 mm, length l1= 20 mm, d2= 8 mm and a = 45, is designated as follows:ISO 20168:2016-B0 - 16 - 20 - 8 - 456 MaterialThe materials used shall be in accordance with ISO 5182.7 MarkingThe packaging shall be marked with the full designation and material used. ISO 2016 All rights reser
28、ved 3BS ISO 20168:2016ISO 20168:2016(E)Bibliography1 ISO 286-2, Geometrical product specifications (GPS) ISO code system for tolerances on linear sizes Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts2 ISO 1119, Geometrical product specifications (GPS) Series of
29、 conical tapers and taper angles3 ISO 5822, Spot welding equipment Taper plug gauges and taper ring gauges4 ISO 17677-1, Resistance welding Vocabulary Part 1: Spot, projection and seam welding4 ISO 2016 All rights reservedBS ISO 20168:2016BS ISO 20168:2016ISO 20168:2016(E) ISO 2016 All rights reserv
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