1、BRITISH STANDARD BS EN 20865:1992 ISO 865:1981 Slots in platens for projection welding machines The European Standard EN 20865:1991 has the status of a British StandardBSEN20865:1992 This British Standard was published under the authority of the Standards Board and comes into effect on 31 January 19
2、92 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference WEE/26 Draft for comment 85/72846 DC ISBN 0 580 20465 0 Cooperating organizations The European Committee for Standardization, under whose supervision this European Standard was prepared, comprises th
3、e national standards organizations of the following Western European countries. Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsch
4、es 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 Luxemburg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-insti
5、tuut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaol de Normalizacin y. Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued sinc
6、e publication Amd. No. Date CommentsBSEN20865:1992 BSI 09-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN 20865 3 National appendix NA (informative) Inside back cover National appendix NB (informative) Inside back coverBSEN20865:1992 ii BS
7、I 09-1999 National foreword This British Standard has been prepared under the direction of the Welding Standards Policy Committee and is the English language version of EN20865:1991 “Slots in platens for projection welding machines”, published by the European Committee for Standardization (CEN). It
8、supersedes BS3856:1986, which is withdrawn. EN 20865:1991 is identical with ISO 865:1981 published by the International Organization for Standardization (ISO). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for th
9、eir correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 4, an inside back cover and a back cover. This standard h
10、as been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 20865 November 1991 UDC 621.791.763.2.037-229.3-45 Descriptors: Electric welding, resistance wel
11、ding machines, machine tables, T-slots, dimensions, designations English version Slots in platens for projection welding machines (ISO 865:1981) Rainures des plateaux des machines souder par bossages (ISO 865:1981) T-Nuten in Platten fr Buckelschweimaschinen (ISO 865:1981) This European Standard was
12、 approved by CEN on 30 October 1991. 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 without any alteration. Up-to-date lists and bibliographical references concerning such na
13、tional 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 made by translation under the responsibility of a CEN member into its own language and
14、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, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKin
15、gdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN 1991 Copyright reserved to all CEN members Ref. No. EN 20865:1991 EEN20865:1991 2 BSI 09-1999 Foreword In 1989, ISO 865:1981 was
16、 submitted to CEN Primary Questionnaire procedure. Following the positive result of the Primary Questionnaire, the CEN Technical Bureau agreed to submit ISO 865:1981, without modifications, to Formal Vote. In accordance with the Common CEN/CENELEC Rules, the following countries are bound to implemen
17、t this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. Endorsement notice The text of the International Standard ISO865:1981 was approved by CEN as a Euro
18、pean Standard without any modification. Contents Page Foreword 2 1 Scope and field of application 3 2 Reference 3 3 Dimensions on T-slots 3 4 Pitch, number and location of the T-slots 3 5 Designation 3 Table 3EN20865:1991 BSI 09-1999 3 1 Scope and field of application This International Standard spe
19、cifies requirements for dimensions, pitch and location of T-slots on platens for projection welding machines. 2 Reference ISO 299, Machine tool tables T-slots and corresponding bolts. 3 Dimensions on T-slots The dimensions of T-slots in the platens of resistance welding machines shall be in accordan
20、ce with the indications given in the Table. NOTEWhen, in special circumstances, it is necessary to depart from the slot size given in the Table, the dimensions shall be in accordance with those given in ISO299. 4 Pitch, number and location of the T-slots The pitch of T-slots shall be63 0,5mm. The to
21、lerance of the total dimension between any two T-slots (regardless of the number of slots between) shall be 0,5mm. The number of T-slots shall be even. However, for small machines (i.e. with a maximum force of5kN), it is permissible to use platens with an odd number of slots where the central slot i
22、s located in the centre line of the platen. The lower slot shall be positioned at90relative to the upper slot. Whenever possible, it is recommended that the upper slots should be parallel to the throat. 5 Designation The relevant number of slots in a platen shall be specified after the reference ISO
23、865, for example the designation of a platen with4T-slots is. Platen ISO 865-4 Table Dimensions in millimetres Electrode force A B C H a a b a E max. F max. G max. 5 kN 12 H12 19 9 21 10 18 1 0,6 1 W 5 kN 14 H12 23 11 24 12 22 1,6 0,6 1,6 a For information only. +2 0 +1 0 +2 0 +2 0 +1 0 +2 04 blankB
24、SEN20865:1992 BSI 09-1999 National appendix NA (informative) The United Kingdom participation in the preparation of this European Standard was entrusted by the Welding Standards Policy Committee (WEE/-) to Technical Committee WEE/26 upon which the following bodies were represented: British Non-ferro
25、us Metals Federation British Steel Industry Copper Development Association Electricity Industry in United Kingdom Institution of Incorporated Executive Engineers Society of British Aerospace Companies Limited Society of Motor Manufacturers and Traders Limited Welding Institute Welding Manufacturers
26、Association (BEAMA Ltd.) Coopted members National appendix NB (informative) The British Standards corresponding to the International Standards referred to in the text is as follows: International Standard British Standard a ISO 299 BS 122 Milling cutters Part 3:1987 Specification for milling cutters
27、 except screwed shank cutters (Technically equivalent) a Where no identical or technically equivalent British Standard exists, the user is directed to the relevant European or International Standard, copies of which may be obtained from BSI Sales, Linford Wood, Milton Keynes MK146LE, telephone090822
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