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    IEC 61191-4-2017 Printed board assemblies - Part 4 Sectional specification - Requirements for terminal soldered assemblies《印刷电路板组件 第4部分 分规范 端点焊接组件的要求》.pdf

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    IEC 61191-4-2017 Printed board assemblies - Part 4 Sectional specification - Requirements for terminal soldered assemblies《印刷电路板组件 第4部分 分规范 端点焊接组件的要求》.pdf

    1、 IEC 61191-4 Edition 3.0 2017-07 INTERNATIONAL STANDARD Printed board assemblies Part 4: Sectional specification Requirements for terminal soldered assemblies IEC 61191-4:2017-07(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC, Geneva, Switzerland All rights reserved. Unless otherwise

    2、 specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IECs member National Committee in the country of the requester. If you have any question

    3、s about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. IEC Central Office Tel.: +41 22 919 02 11 3, rue de Varemb Fax: +41 22 919 03 00 CH-1211 Geneva 20 inf

    4、oiec.ch Switzerland www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of IEC publica

    5、tions is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might have been published. IEC Catalogue - webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical information on IEC International

    6、Standards, Technical Specifications, Technical Reports and other documents. Available for PC, Mac OS, Android Tablets and iPad. IEC publications search - www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criteria (reference number, text, technical committee,).

    7、 It also gives information on projects, replaced and withdrawn publications. IEC Just Published - webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published details all new publications released. Available online and also once a month by email. Electropedia - www.elect

    8、ropedia.org The worlds leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions in English and French, with equivalent terms in 16 additional languages. Also known as the International Electrotechnical Vocabulary (IEV) online. IEC Glossary - std.iec.ch/glo

    9、ssary 65 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002. Some entries have been collected from earlier publications of IEC TC 37, 77, 86 and CISPR. IEC Customer Service Centre - webstore.iec.ch/csc

    10、If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 61191-4 Edition 2.0 2017-07 INTERNATIONAL STANDARD Printed board assemblies Part 4: Sectional specification Requirements for terminal soldered assemblies IN

    11、TERNATIONAL ELECTROTECHNICAL COMMISSION ICS 31.240 ISBN 978-2-8322-4657-3 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. 2 IEC 61191-4:2017 IEC 2017 CONTENTS FOREWORD . 4 1 Scope 6 2 Normativ

    12、e references 6 3 Terms and definitions 6 4 General requirements 6 5 General terminal and part mounting requirements 6 5.1 General . 6 5.2 Wire and cable preparation . 7 5.2.1 General . 7 5.2.2 Tinning of stranded wire 7 5.3 Terminal installation 7 5.3.1 General . 7 5.3.2 Terminal mounting (mechanica

    13、l) 7 5.3.3 Terminal shank discontinuities . 8 5.3.4 Flange discontinuities 8 5.3.5 Terminal mounting (electrical) 8 5.3.6 Flange angles 9 5.3.7 Shank discontinuities . 9 5.3.8 Flared flange discontinuities 9 5.4 Mounting to terminals 10 5.4.1 General . 10 5.4.2 Wire and lead wrap-around 10 5.4.3 Sid

    14、e route connection 10 5.4.4 Top and bottom route connection . 11 5.4.5 Continuous runs 12 5.4.6 Service loops . 13 5.4.7 Insulation clearance . 13 5.4.8 Orientation of wire wrap . 14 5.4.9 Stress relief . 14 5.4.10 Pierced or perforated terminals 14 5.4.11 Cup and hollow cylindrical terminal solderi

    15、ng . 15 6 Acceptance requirements 16 6.1 General . 16 6.2 Control and corrective actions . 16 6.3 Terminal soldering 16 6.3.1 General . 16 6.3.2 Wire-terminal attachment . 16 6.4 Part marking and reference designations 16 7 Rework of unsatisfactory soldered connections 16 Bibliography 18 Figure 1 Ro

    16、lled flange terminal 8 Figure 2 Rolled flange discontinuities . 8 Figure 3 Flared flange terminals. 9 Figure 4 Flared angles . 9 IEC 61191-4:2017 IEC 2017 3 Figure 5 Wire and lead wrap around 10 Figure 6 Side route connections and wrap on bifurcated terminal . 11 Figure 7 Top and bottom route termin

    17、al connection 12 Figure 8 Continuous run wire wraps . 13 Figure 9 Service loop for lead wiring 13 Figure 10 Insulation clearance measurement (c) 14 Figure 11 Stress relief examples 14 Figure 12 Pierced or perforated terminal wire wrap 15 Table 1 Nicked or broken strand limits . 7 Table 2 Plated thro

    18、ugh-holes with terminals, minimum acceptance conditions . 16 Table 3 Defects for terminal attachment and soldering defects . 17 4 IEC 61191-4:2017 IEC 2017 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PRINTED BOARD ASSEMBLIES Part 4: Sectional specification Requirements for terminal soldered assembli

    19、es FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in

    20、the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entruste

    21、d to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the Internati

    22、onal Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each

    23、 technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

    24、 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in thei

    25、r national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessme

    26、nt services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employee

    27、s, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the pu

    28、blication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the poss

    29、ibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61191-4 has been prepared by IEC technical committee 91: Electronics assembly technology. This se

    30、cond edition cancels and replaces the first edition published in 1998. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: The requirements have been updated to be compliant with the acceptance criteri

    31、a in IPC-A-610F. IEC 61191-4:2017 IEC 2017 5 The text of this International Standard is based on the following documents: CDV Report on voting 91/1399/CDV 91/1434/RVC Full information on the voting for the approval of this International Standard can be found in the report on voting indicated in the

    32、above table. This document has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 61191 series, published under the general title Printed board assemblies, can be found on the IEC website. The committee has decided that the contents of this document will r

    33、emain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific document. At this date, the document will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issue

    34、d at a later date. 6 IEC 61191-4:2017 IEC 2017 PRINTED BOARD ASSEMBLIES Part 4: Sectional specification Requirements for terminal soldered assemblies 1 Scope This part of IEC 61191 prescribes requirements for terminal soldered assemblies. The requirements pertain to those assemblies that are entirel

    35、y terminal/wire interconnecting structures or to the terminal/wire portions of those assemblies that include other related technologies (i.e. surface mounting, through-hole mounting, chip mounting). 2 Normative references The following documents are referred to in the text in such a way that some or

    36、 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 referenced document (including any amendments) applies. IEC 60194, Printed board design, manufacture and assembly Terms and definit

    37、ions IEC 61191-1:2013, Printed board assemblies Part 1: Generic specification Requirements for soldered electrical and electronic assemblies using surface mount and related assembly technologies 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60194 a

    38、pply. 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/obp 4 General requirements Requirements of IEC 61191-1 are a mandatory pa

    39、rt of this specification. Workmanship shall meet the requirements of IPC-A-610 in accordance with the classification requirements of this document. 5 General terminal and part mounting requirements 5.1 General The requirements of 5.2 are applicable to terminals and part mounting in all types of asse

    40、mblies. IEC 61191-4:2017 IEC 2017 7 5.2 Wire and cable preparation 5.2.1 General Sufficient insulation cover shall be stripped from the wire or leads to provide for insulation clearances as specified. Chemical stripping agents shall be used for solid wire only and shall be neutralized or removed pri

    41、or to soldering. In stripping insulation, care should be taken to avoid nicking or otherwise damaging the wire or the remaining insulation. For level A or B assemblies, the number of nicked or broken strands in a single wire shall not exceed the limits given in Table 1. For wires used at a potential

    42、 of 6 kV or greater, or for level C assemblies, there shall be no broken strands. The number of nicked strands shall be in accordance with Table 1. Insulation discolouration resulting from thermal stripping is permissible. Table 1 Nicked or broken strand limits Number of strands Maximum allowable sc

    43、raped, nicked or broken strands Level A and B Level C not tinned Level C pretinned 1 (solid) No damage in excess of 10 % conductor diameter 2 to 6 0 0 0 7 to 15 1 0 1 16 to 25 3 0 2 26 to 40 4 3 3 41 to 60 5 4 4 61 to 120 6 5 5 121 or more 6 % of strands 5 % of strands 5 % of strands 5.2.2 Tinning o

    44、f stranded wire Portions of stranded wire to be soldered shall be tinned prior to mounting. The solder shall wet the stranded wire and penetrate to the inner strands of the wire. Wicking of solder under the insulation shall be minimized. 5.3 Terminal installation 5.3.1 General The detailed requireme

    45、nts for installation of solder terminals are defined in 5.3.2 to 5.3.8. 5.3.2 Terminal mounting (mechanical) Terminals not connected to printed wiring or ground planes shall be of the rolled flange configuration (see Figure 1). A printed foil land may be used as a seating surface for a rolled flange

    46、 provided that the land is isolated and not connected to active printed wiring or ground plane. 8 IEC 61191-4:2017 IEC 2017 Figure 1 Rolled flange terminal 5.3.3 Terminal shank discontinuities The shank of the terminal shall not be perforated, split, cracked, and there shall not be discontinuity to

    47、the extent that oils, flux, inks, or other substances used for processing the printed board can be entrapped. Circumferential cracks or splits in the shank are not acceptable regardless of the extent. 5.3.4 Flange discontinuities The rolled flange shall not be split, cracked or otherwise discontinuo

    48、us to the extent that flux, oils, inks, or other liquid substances used for processing the printed board can be entrapped within the mounting hole. After rolling, the rolled area shall be free of circumferential splits or cracks, but may have a maximum of three radial splits or cracks provided that

    49、the splits or cracks are separated by at least 90 and do not extend into the barrel of the terminal (see Figure 2). a) Acceptable b) Not acceptable Figure 2 Rolled flange discontinuities 5.3.5 Terminal mounting (electrical) Flared flange terminals shall be mounted in non-interfacial plated through-holes provided the mounting is in conjunction with a land or ground plane on the flared side as shown in Figure 3a. They shall not be flared to the base mater


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