1、ASD STANDARD NORME ASD ASD NORM prEN 4673-003 Edition P 1 December 2009 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.orgICS: Descriptors: ENGLISH VERSION Aer
2、ospace series Inserts, UNJ threads, self-locking, with self-broaching keys Part 003: Technical specification Srie arospatiale Douilles filetes, filetage UNJ, freinage interne, clavettes autobrochantes Partie 003 : Spcification technique Luft- und Raumfahrt Gewindeeinstze, UNJ-Gewinden, selbstsichern
3、d, mit selbstrumenden Stiften Teil 003: Technische Lieferbedingungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Indu
4、stry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identificati
5、on of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then t
6、o implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 15 December 2009 Comments should be sent within six months after the date of publication to ASD-STAN Mechanical
7、Domain Copyright 2009 by ASD-STAN prEN 4673-003:2009 (E) 2 Contents Page Foreword2 1 Scope 3 2 Normative references 3 3 Terms and definitions .4 4 Quality assurance6 5 Requirements.7 Annex A (normative) Definition of test block 17 Annex B (normative) Assembly for rotational resistance test 18 Annex
8、C (normative) Axial tensile strength test. 19 Annex D (normative) Assembly for reusability test 21 Annex E (normative) “GO“ gauge for inspection of the position of the keys 23 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Mechanical Domain. After inquiries and
9、votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 4673-003:2009 (E) 3 1 Scope This standard specifies the characteristics, qualification and acceptance requirements for self-locking insert
10、s, self-broaching keys with UNJ threads, for aerospace applications. It is applicable whenever 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, t
11、he latest edition of the referenced document (including any amendments) applies. EN 2638, Aerospace series Aluminium alloy 2024-T3 Extruded bar and section 1,2 mm (a or D) 150 mm with coarse peripheral grain control 1)EN 4673-001, Aerospace series Inserts, UNJ threads, self-locking, self-broaching k
12、eys Part 001: Installation and removal procedure 1)EN 4673-002, Aerospace series Inserts, UNJ threads, self-locking, self-broaching keys Part 002: Design standard 1)EN 9133, Aerospace series Quality management systems Qualification Procedure for Aerospace Standard Parts ISO 2859-1, Sampling procedur
13、es for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-Iot inspection ISO 3161, UNJ threads General requirements and limit dimensions ISO 3452, Non-destructive testing Penetrant inspection General principles ISO 4288, Geometrical Product Specifi
14、cations (GPS) Surface texture: Profile method Rules and procedures for 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. 2) Published by: American Society for Te
15、sting and Materials (ASTM), 1916, Race Street, Philadelphia, PA 19103, USA. prEN 4673-003:2009 (E) 4 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 batch quantity of finished parts, of the same type and same diameter, produced from
16、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 the material which may extend
17、 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 non-metallic particles origin
18、ating 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 the taking of n items from a population of N items in such a way that all possible combinations of n items
19、 have the same probability of being chosen 3.2.7 critical defect a 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 prevent performance of the f
20、unction of a major end item 3.2.8 major defect a 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 prEN 4673-003:2009 (E) 5 3.2.9 minor defect a defect that is not likely to reduce materially the
21、 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 a plan according to which one or more samples are taken in order to obtain information and
22、 possibly to reach 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 probability that a lot of this quality would
23、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) a quality limit which in a sampling plan corresponds to a specified but relatively high probability of acceptance NOTE It
24、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 an insert ready for use, inclusive of any possible treatments and/or surface coatings, as speci
25、fied in the definition document 3.2.14 definition document document specifying all the requirements for finished inserts 3.2.15 self-locking torque the torque to be applied to the associated bolt to maintain movement of rotation in relation to the part, the assembly being under no axial load and the
26、 insert locking zone being completely engaged with the bolt (minimum protrusion of two pitches, including the end chamfer) 3.2.16 seating torque the tightening torque to be applied to the insert or bolt to introduce or to increase the axial load in the assembly 3.2.17 unseating torque the untighteni
27、ng torque to be applied to the insert or bolt to reduce or remove the axial load in the assembly prEN 4673-003:2009 (E) 6 3.2.18 breakaway torque the torque required to start unscrewing the insert or the bolt from the associated part, with the insert locking device still fully engaged on the bolt, b
28、ut 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-broaching keys) are specified in Table 1
29、. 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 be based on the results obtained on
30、 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 tests is to check, as simply as possib
31、le, 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, methods, numbers of inserts) are specifi
32、ed 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 of the qualification inspections and
33、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 tests shall be carried out by the man
34、ufacturer, 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. prEN 4673-003:2009 (E) 7 5 Requirements See Table 1. Table 1 Technical requirements and test methods Clause Characteristic Requ
35、irement Inspection and test method Q/A aSample size Q 5.1 Material In accordance with the definition document. Chemical analysis or certificate of conformity issued by the manufacturer of the semi-finished product. A Q 39 5.2 Dimensions, tolerances and tolerances of form and position In accordance w
36、ith 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. A Tables 3 and 4 5.3 Manufacturing 5.3.1 Process Insert threads may be produced by machining or forming.
37、Manufacturing method shall be indicated on test report. 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 not be removed by subsequent machining shall be removed by abrasive blasting
38、 with an appropriate equipment. Visual examination. 5.3.2 Heat treatment The material shall be heat treated in accordance with the material specification defined in the definition document. Examination of the heat treatment specification. continued prEN 4673-003:2009 (E) 8 Table 1 (continued) Clause
39、 Characteristic Requirement Inspection and test method Q/A aSample size 5.3.3 Q 39 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 standard. The finished inserts shall allow the “GO“ thread plug
40、gauge to enter a minimum of three turns, when gauged from the installation side before engagement in the locking zone. Standard gauging. A Tables 3 and 4 Q 3 5.3.4 Surface roughness In accordance with the definition document. ISO 4288. A Tables 3 and 4 Q 36 A Tables 3 and 4 5.3.5 Surface coating In
41、accordance with the definition document. See applicable coating standard. A Table 6 5.4 Mechanical properties Q 5 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,
42、 deformation of the internal thread of the insert caused by keys installation. Inserts shall be installed into test block (see Annex A, normative) in accordance with EN 4673-001. Use a tool specified in accordance with EN 4673-001. Visual examination at a suitable magnification of 10 to 20. The reco
43、rded hardness of the test blocks must be indicated in the test report. A Table 5 5.4.1.1 into test block in aluminium See 5.4.1. See 5.4.1. Q 14 5.4.1.2 into test block in corrosion resisting steel See 5.4.1. See 5.4.1. Q 16 5.4.1.3 into test block in titanium alloy See 5.4.1. See 5.4.1. Q 6 continu
44、ed prEN 4673-003:2009 (E) 9 Table 1 (continued) Clause Characteristic Requirement Inspection and test method Q/A aSample size 5.4.2 Rotational resistance Q 5 5.4.2.1 into test block in aluminium alloy Inserts shall withstand the torque specified in Table B.1 without rotation. Inserts shall be instal
45、led in accordance with 5.4.1.1. The installed inserts shall be tested in a counter clockwise direction as shown in Annex B (normative). Q 5 5.4.2.2 into test block in corrosion resisting steel dSee 5.4.2.1. Inserts shall be installed into test block in corrosion resisting steel (see Annex A). Test m
46、ethod, see 5.4.2.1. Q 6 c5.4.3 Axial loadbInserts shall withstand axial strength corresponding to the strength class given in the definition document or in the material specification. Insert shall not axially move from the test block. Minimal length of external thread of the insert shall be fixed in
47、 the producer design. After testing inserts shall be free from: cracks, tearing or deformation of the internal thread of the insert preventing disassembly of the bolt. Permanent distortion or loss up to 40 % of the locking torque with regard with the breakaway torque recorded before axial load appli
48、cation is acceptable. Inserts shall be installed in accordance with 5.4.1.1 and 5.4.1.2. The breakaway torque shall be recorded. The axial strength values specified in Annex C (normative) or in the definition document shall apply. continued prEN 4673-003:2009 (E) 10 Table 1 (continued) Clause Charac
49、teristic Requirement Inspection and test method Q/A aSample size 5.4.4 Reusability General: After testing, inserts shall not show any indications of distortion, galling or scratches of such a depth as to prevent reassembly of bolts freely, by hand, up to the self-locking zone. Bolt threads shall remain serviceable and permit assembly with a new insert freely, by hand, up to the self-locking zone. Test assembly see Annex D (normative). A new bolt shall be used for each complete 3, 5 and 25 cycles test. The pitch
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