1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 4673-003:2010Aerospace series Inserts, UNJthreads, self-locking, with self-broaching keysPart 003: Technical specificationBS EN 4673-003:2010 BRITISH STANDARDNational forew
2、ordThis British Standard is the UK implementation of EN 4673-003:2010.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/12, Aerospace fasteners and fastening systems.A list of organizations represented on this committee can beobtained on request to its secretary.This pu
3、blication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 65299 8ICS 49.030.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the
4、authority of theStandards Policy and Strategy Committee on 31 March 2011.Amendments issued since publicationDate Text affectedBS EN 4673-003:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 4673-003 August 2010 ICS 49.030.30 English Version Aerospace series - Inserts, UNJ threads, self-locki
5、ng, with self-broaching keys - Part 003: Technical specification Srie arospatiale - Douilles filetes, filetage UNJ, freinage interne, clavettes auto-brochantes - Partie 003: Spcification technique Luft- und Raumfahrt - Gewindeeinstze, UNJ-Gewinden, selbstsichernd, mit selbstrumenden Stiften - Teil 0
6、03: Technische Lieferbedingungen This European Standard was approved by CEN on 12 June 2010. 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
7、 lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre 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
8、 responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gree
9、ce, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Manageme
10、nt Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4673-003:2010: EBS EN 4673-003:2010EN 4673-003:2010 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and defini
11、tions .54 Quality assurance 74.1 Qualification .74.2 Acceptance .74.2.1 Purpose .74.2.2 Conditions 74.2.3 Responsibility 74.2.4 Inspection and test report .75 Requirements .8Annex A (normative) Definition of test block 18Annex B (normative) Assembly for rotational resistance test 19Annex C (normativ
12、e) Axial tensile strength test . 20Annex D (normative) Assembly for reusability test 22Annex E (normative) “GO“ gauge for inspection of the position of the keys 26BS EN 4673-003:2010EN 4673-003:2010 (E) 3 Foreword This document (EN 4673-003:2010) has been prepared by the Aerospace and Defence Indust
13、ries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to
14、 CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2011, and conflicting national standards shall be withdrawn at the latest by February 2011. Attention is drawn to the possibility tha
15、t some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to
16、 implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Swede
17、n, Switzerland and the United Kingdom. BS EN 4673-003:2010EN 4673-003:2010 (E) 4 1 Scope This European Standard specifies the characteristics, qualification and acceptance requirements for self-locking inserts, self-broaching keys with UNJ threads, for aerospace applications. It is applicable whenev
18、er referenced. 2 Normative references The following referenced documents are indispensable for the application 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. EN 2638, Ae
19、rospace series Aluminium alloy 2024-T3 Extruded bar and section 1,2 (a or D) 150 mm with coarse peripheral grain control 1)EN 4673-001, Aerospace series Inserts, UNJ threads, self-locking, with self-broaching keys Part 001: Installation and removal procedure EN 4673-002, Aerospace series Inserts, UN
20、J threads, self-locking, with self-broaching keys Part 002: Design standard EN 9133, Aerospace series Quality management systems Qualification Procedure for Aerospace Standard Parts ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality li
21、mit (AQL) for lot-by-Iot inspection ISO 3161, Aerospace UNJ threads General requirements and limit dimensions ISO 3452-1, Non-destructive testing Penetrant inspection Part 1: General principles ISO 4288, Geometrical Product Specifications (GPS) Surface texture: Profile method Rules and procedures fo
22、r the assessment of surface texture ASTM-E112-96, Standard Test Methods for Determining Average Grain Size 2)1) Published as ASD-STAN Prestandard at the date of publication of this standard by Aerospace and Defence Industries Association of Europe-Standardization (ASD-STAN), (www.asd-stan.org). 2) P
23、ublished by: ASTM National (US) American Society for Testing and Materials http:/www.astm.org/. BS EN 4673-003:2010EN 4673-003:2010 (E) 5 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 batch quantity of finished parts, of the same type and s
24、ame diameter, produced from the same material obtained from the same melt, manufactured in the course of the same production cycle, following the same manufacturing route and having undergone all the relevant heat treatments and surface treatments 3.2 Surface discontinuities 3.2.1 crack rupture in t
25、he material which may extend in any direction and which may be intercrystalline or transcrystalline in character 3.2.2 seam open surface defect 3.2.3 lap surface defect caused by folding over metal fins or sharp corners and then rolling or forging them into the surface 3.2.4 inclusions metallic or n
26、on-metallic particles originating from the manufacturing process. These particles may be isolated or arranged in strings. 3.2.5 test temperature ambient temperature, unless otherwise specified 3.2.6 simple random sampling taking of n items from a population of N items in such a way that all possible
27、 combinations of n items have the same probability of being chosen 3.2.7 critical defect defect that, according to judgement and experience, is likely to result in hazardous or unsafe conditions for individuals using, maintaining, or depending upon the considered product, or that is likely to preven
28、t performance of the function of a major end item 3.2.8 major defect defect other than critical, that is likely to result in a failure or to reduce materially the usability of the considered product for its intended purpose BS EN 4673-003:2010EN 4673-003:2010 (E) 6 3.2.9 minor defect defect that is
29、not likely to reduce materially the usability of the considered product for its intended purpose, or that is a departure from established specification having little bearing on the effective use or operation of this product 3.2.10 sampling plan plan according to which one or more samples are taken i
30、n order to obtain information and possibly to reach a decision 3.2.11 limiting quality (LQ10) in a sampling plan, the quality limit which corresponds to a specified 10 % probability of acceptance NOTE 1 It is the limiting lot quality characteristic that the consumer is willing to accept with a low p
31、robability that a lot of this quality would occur. NOTE 2 For the purposes of this Standard, the limiting quality quoted in Table 4 corresponds to a probability of acceptance of 10 %. 3.2.12 acceptance quality limit (AQL) quality limit which in a sampling plan corresponds to a specified but relative
32、ly high probability of acceptance. It is the maximum per cent defective (or the maximum number of defects per hundred units) that, for purposes of sampling inspection can be considered satisfactory as a process average. 3.2.13 finished insert insert ready for use, inclusive of any possible treatment
33、s and/or surface coatings, as specified in the definition document 3.2.14 definition document document specifying all the requirements for finished inserts 3.2.15 self-locking torque torque to be applied to the associated bolt to maintain movement of rotation in relation to the part, the assembly be
34、ing under no axial load and the insert locking zone being completely engaged with the bolt (minimum protrusion of two pitches, including the end chamfer) 3.2.16 seating torque tightening torque to be applied to the insert or bolt to introduce or to increase the axial load in the assembly 3.2.17 unse
35、ating torque untightening torque to be applied to the insert or bolt to reduce or remove the axial load in the assembly BS EN 4673-003:2010EN 4673-003:2010 (E) 7 3.2.18 breakaway torque torque required to start unscrewing the insert or the bolt from the associated part, with the insert locking devic
36、e still fully engaged on the bolt, but after the axial load in the assembly has been removed by unscrewing half a turn followed by a halt in rotational movement 4 Quality assurance 4.1 Qualification EN 9133 Qualification inspections and tests (requirements, methods, numbers of inserts with self-broa
37、ching keys) are specified in Table 1. They shall be carried out on: each type and diameter of inserts; 39 inserts selected from a single batch by simple random sampling. The test programme may possibly be reduced, or the qualification be granted without inspection or testing: Any such decision shall
38、 be based on the results obtained on similar types and diameters of inserts provided that the design and manufacturing conditions are identical. Table 2 indicates the allocation of insert samples for the inspections and tests. 4.2 Acceptance 4.2.1 Purpose The purpose of acceptance inspections and te
39、sts is to check, as simply as possible, by a method representative of actual use conditions, with the uncertainty inherent to statistical sampling, that the inserts constituting the batch satisfy the requirements of this standard. 4.2.2 Conditions Acceptance inspections and tests (requirements, meth
40、ods, numbers of inserts) are specified in Table 1. They shall be carried out on each batch. Inserts from the batch to be tested shall be selected by simple random sampling. Each insert may be submitted to several inspections or tests. If a more stringent inspection is deemed necessary, all or part o
41、f the qualification inspections and tests may be performed during the acceptance inspections and tests. In this case, the number of inserts submitted to these inspections and tests is the same as that submitted for qualification inspection and tests. 4.2.3 Responsibility Acceptance inspections and t
42、ests shall be carried out by the manufacturer, or under his responsibility. 4.2.4 Inspection and test report A test report showing actual numerical values shall be provided if specified in the purchase order. BS EN 4673-003:2010EN 4673-003:2010 (E) 8 5 Requirements See Table 1. Table 1 Technical req
43、uirements and test methods Clause Characteristic Requirement Inspection and test method Q/A aSample size 5.1 Material In accordance with the definition document. Chemical analysis or certificate of conformity issued by the manufacturer of the semi-finished product. Q A 5.2 Dimensions, tolerances and
44、 tolerances of form and position In accordance with the definition document. A “GO” inspection gauge is to be fitted on the insert keys. On completion of this inspection, the keys must neither be bent nor moved. Standard gauging. See Annex E. Q 39 A Tables 3 and 4 5.3 Manufacturing 5.3.1 Process Ins
45、ert threads may be produced by machining or forming. Manufacturing method shall be indicated on test report. 5.3.2 Heat treatment The heat treatment medium or atmosphere shall not cause any surface contamination. Calibration of the heat treatment equipment shall be confirmed. Any scale which will no
46、t be removed by subsequent machining shall be removed by abrasive blasting with an appropriate equipment. Visual examination. The material shall be heat treated in accordance with the material specification defined in the definition document. Examination of the heat treatment specification. continue
47、d BS EN 4673-003:2010EN 4673-003:2010 (E) 9 Table 1 (continued) Clause Characteristic Requirement Inspection and test method Q/A aSample size 5.3.3 Thread deformation (form out-of round) Threads in the locking zone may be deformed in any manner provided that the insert meets the requirements of this
48、 standard. The finished inserts shall allow the “GO“ thread plug gauge to enter a minimum of three turns, when gauged from the installation side before engagement in the locking zone. Standard gauging. Q 39 A Tables 3 and 4 5.3.4 Surface roughness In accordance with the definition document. ISO 4288
49、. Q 3 A Tables 3 and 4 5.3.5 Surface coating In accordance with the definition document. See applicable coating standard. Q 36 A Tables 3 and 4 A Table 6 5.4 Mechanical properties 5.4.1 Installation requirement The screwing of insert shall be possible freely by hand. After testing, the inserts shall show no signs of: buckling and/or incomplete fitting of the keys, deformation of the internal thread of the insert caused by keys installation. Inserts shall be installed into test
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