1、AECMA PREN3005 87 10L231L 000LLb05 T W - A. E .C .M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 3006 Issue P 1 April 1989 DITE PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard Malesherbes. 75008 PARIS - TL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospa
2、ce series Nuts, self-locking, in heat resisting nickel base alloy NI-PI O1 HT (Waspaloy) Classification : I21 O MPa/730 OC Technical specification Srie arospatiale crous, auto-freinants en alliage base nickel rsistant chaud NI-PIO1 HT (Waspaioy) Classification : 121 O MPa/730 OC Spcification techniq
3、ue Luft- und Raumfahrt Muttern, selbstsichernd aus hochwarmfester Nickel basislegierung NI-PT01 HT (Waspaloy) Klasse : 121 O MPa/730 OC Technische Lieferbedngungen This Aerospace Series) pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matr
4、iel Arospatial). It is published on green paper for the needs of AECMA-Members. it has been technically approved by the experts of the concerned AECMA Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed
5、to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft E
6、uropean Standard to CEN (European Committee for Standardization) for final vote. Nota - Extra copies can be supplied by B.N.A.E. - 8, rue Moreau-Vauthier - 92100 BOULOGNE-BILLANCOURT Edition approved for publication Comments should be sent within six months C8 Chairman Mr WILLIAMS after the date of
7、publication decision 88, Bd. Malesherbes 25th April 1989 A.E.C.M.A. 75008 PARIS - FRANCE aecrna 1989 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Co
8、ntents. i). Scope and field of application 2). References 3). Definitions 3.1). Production batch. 3.2). Inspection lot. 3.3). Discontinuities. 3.4). Test temperature. 3.5). Simple random sampling. 3.6). Critical defect. 3-7)- Major defect. 3.8). Minor defect. 3.9). Sampling plan. 3.10).Limiting qual
9、ity. 3.ii).Acceptable quality level 3.12).Finished nut. 3.13).Definition document. 3.141.Self locking torque. 3.15).Seating torque. 3.16).Unseating torque. 3.171.Breakaway torque. 3.181.Wrench torque. AECMA PREN3005 87 LOL23Ll 0004bOb L 9 I prEN3005 Page 2 4).Certification and quality assurance. 4.1
10、). Qualification. 4.2). Acceptance. 4.3). Quality system certification. 4.4). Responsibility for inspection and tests. 4.5). Inspection and test report. S).Table I : Technical requirement and test methods. 5.1). Materials. 5.2). Dimensions;tolerances of form and position; 5.3). Manufacturing. 5.4).
11、Mechanical properties. 5.5). Metallurgical properties. 5.6). Product identification. 5.7) . Delivery. Table 2.: Summary of tests-Qualification and Table 3.: Qualification testing requasentents for Table 4.: Load values os Axial strength: Wrench threads and quality production acceptance. nut samples.
12、 torque; Push out; Torque out and Tight- ening torque for accelerated vibratisn. torque and Assembly torque. Table 5.: Values for Breakaway torque;locking Table 6.: Classification of defects. Table 7.: Sampling plans for visual inspections and Table 8.: Sampling plans for the inspection of dimension
13、al characteristics- mechanical and metallurgical characteristics. Table 9.: Maximum depth of permissible discontinuities. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without li
14、cense from IHS-,-,-I a O 1.Scope and field of application This standard specifies tRe technical; quaLifacation and quaity assurance requirements for self lockfng nuts En material NI-PlOi-HT(Waspa1oy) of tensile strength class 1210MPa. at room temperature, maximum test temperature of material 730 C.
15、Primarily for Aerospace applications it is applicable to such self locking nuts when referenced on the product standard or drawing. 2-References IS0 2859-1 Is0 3452 Is0 3453 IS0 3534 IS0 8642 IS0 9002 EN 2002-8 EN 2959 EN 2960 EN 3039 EN 3041 EN 3042 EN 3220 CN/TR 3040 Sampling procedures for inspec
16、tion by attributes - Part 1: Sampling plans indexed by acceptable quality level(AQL) for lot by lot inspection. 4)- Non destructive testing - Penetrant inspection - General principles Non destructive testing - Liquid penetrant inspection - Means of verification Statistics - Vocabulary and symbols Ae
17、rospce - Fasteners - self locking nuts with maximum operating temperature greater than 425OC - test methods. Quality systems - Model for quality assurance in production and installation. Aerospace Series - Test methods for metallic materials - Part 8 - Micrographic determination of grain size, i). A
18、erospace Series - Heat resisting nickel base alloy NL-P101-HT - Solution treated and cold worked - Bars for hot upset forging for fasteners. 2). Aerospace Series - Heat resisting nickel base alloy NI-PlO1-HT - Cold worked and solution treated - Bars for machining for fasteners. 2). Aerospace series
19、- Quality systems: supplementary requirements to IS09002 applicable to the manufacture/processing of materiel for propulsion standard parts. 3). Aerospace series - Propulsion standard parts - Manufacturing process - change procedure for qualified parts. 3). Aerospace series - Propulsion standard par
20、ts - Qualification procedure. 2). Aerospace Series - Heat resisting nickel base alloy NI-Pli-HT - Cold worked and softened - Ear and wire for continuous cold forging or extrusion of fasteners. 2). : Aerospace series - Propulsion standard parts - Qualification - List of qualified manufacturers. 3). i
21、) published as AEm standard 2) Published as AEW pre-standard 3) in cwrse of preparation 4) At present at the stage of draft.(Revicion, in part of Is0 2859-1974 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduct
22、ion or networking permitted without license from IHS-,-,-AECMA PREN3005 87 m LOL23Ll 0004b08 5 m i prEN3005 Page 4 3. ef initions. 3.1 Production batch: Quantity of finished nuts fabricated by the same process from a single material cast(sing1e heat of alloy),having the same basic part number and di
23、ameter, heat treated together to the same specified condition and produced as one continuous run. 3.2 Inspection lot: Consists of nuts from a single production batch of the same part number which completely defines the nut. 3.3 Discontinuities. 3.3.1 Crack: Rupture in the material which may extend i
24、n any direction and which may be intercrystalline or transcrystalline in character. an unwelded open fold in the material. fins or sharp corners and then rolling or forging them into the surface. the material making process. They may exist as discrete particles or strings of particles extending long
25、itudinally. 3.3.2 Seam: Longitudinal surface defect in the form of 3.3.3 Lap: Surface defect caused by folding over metal 3.3.4 Inclusion: Non-metallic particles originating from 3.4 Test temperature: Ambient temperature, unless otherwise specified 3.5 Simple random sampling I): The taking of n item
26、s from a population of N items in such a way that all possible combinations of n items have the same probability of being chosen. 3.6 Critical defect i): A defect that according to judgement and experience, is likely to result in hazardous or unsafe conditions for individuals using, maintaining, or
27、depending upon the considered product, or that is likely to prevent performance of the function of a major end item. 3.7 Major defect i): A defect other than critical, that is likely to result in a failure or to reduce materially the useability of the considered product for its intended purpose. 3.8
28、 Minor defect i): A deect that is not likely to reduce materially the useability 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. 3.9 Sampling plan i): A plan according t
29、o which one or more samples are taken in order to obtain information and possibly to reach a decision. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
30、3.10 Limiting quality LQiO i: In a sampling plan, a qualEty level which corresponds ts a specfed and rePat%veBy low probability of acceptance - in this case 10 percent probability of acceptance- It is the iimiting lot quality characteristic that a lot of this quality would occur, When expressed as a
31、 per cent defective, it may be referred to as a lot tolerance per cent defective, 3.11 Acceptable quality level i): A quaIl-ky leve3 which in a sampling plan corresponds to a specified but relatively high probability of acceptance. It is the maximum per cent defective (or the maximum number of defec
32、ts per hundred units) that, for purpases of sampling inspection, can be considered satisfactory as a process average. 3.12 Finished nut t A nut ready for use inclusive of any possible treatments and/or surface coatings, as specified in the product standard OF drawing. 3.53 Drawing : Document specify
33、ing all the requirements for nuts i.e. - metallurgical - geometrical and dimensional - functional strength and temperature classes). 3.14 Self-locking torque : The torque to be applied to the nut or bolt to maintain movement o rotation in relation to the associated part, the assembly being under no
34、axial load and the nut locking system being completely engaged with the bolt(tws pitches minimum protrusion including end chamfer). 3.15 Seating torque : The tightening torque to be applied to the nut or bolt to introduce or to increase the axial load in the assembly, 3.16 Unseating torque : The unt
35、ightenlng torque to be applied to the nut or bolt to reduce or remove the axial load in the assembly. 3.17 Breakaway torque I The torque required to start unscre- wing the nut or bolt with respect to the associated part, with the nut locking device still fully engaged on the bolt, but after the axia
36、l load in the assembly has been removed by unscrewing half a turn followed by a halt in rotational movement. 3.18 Wrench torque : The tightening and untightening torques which the driving feature of the nut shall withstand, repeatedly, without any permanent deformation which would prevent the approp
37、riate wrench from being used and preclude reuse of the nut. _-_-_-_- :I). Definitions taken in ISO3534-i977 I 1 I (in course of revision within ISO/TC69).: t _T_-_-_-_-_-_- Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for Resal
38、eNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN3005 89 m L01231L 0004610 3 prEN3005 Page 6 4. Certification and quality assurance. The allocation of tests corresponding to the requirements of this standard is as follows: 4.1 Qualification. 4.1.1 Purpose. The purpose
39、of qualification tests is to ensure that the nut design and nut manufacturing conditions allow the nut to comply with the requirements of this standard. 4.1.2 Conditions. The qualification tests summarised in table 3 shall be performed on each type and diameter of nut. Proposed changes in manufactur
40、ing source or procedure shall be subject to the requirements of EN3041 - 46 nuts selected from a single inspection lot by simple random sampling shall be subjected to the qualification tests. The number of nuts to be subjected to each test as well as the method(s) to be used are specified in table 1
41、, The tests to be applied to each nut are shown in table 2. The test programme may possibly be reduced, this decision will be based on the comparison of results obtained from parts of similar design, size and manufacturing conditions. All or part of these tests may also be performed for production a
42、cceptance, when a reinforced inspection seems to be necessary, or to survey nuts that have not proved catisfactory in use. In that case, the sample to be subjected to these tests is the same as that used for the Qualification inspection and tests. 4.1.3 Qualification test requirements and procedures
43、. The quallfication test requirements and procedures shall be to the requirements of EN3042. 4.1.4 Qualified manufacturers. A list of qualified manufacturers for specific standard parts is listed in CN/TR3040. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS
44、under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.2 Acceptance. 4.2.1 Purpose. The purpose of acceptance tests is to check, as simply as possible, by a method representative of actual use conditions, with the uncertainty inherant to statisti
45、cal sampling, that the nuts constituting the batch satisfy the requirements of this standard. 4.2.2 Conditions, Acceptance tests are summarised in table 3. They shall be performed on each batch. Table 1 specifies, the test method and sampling plan to be used for each test. Nuts from the batch to be
46、tested shall be selected by simple random sampling. Each nut may be submitted to several tests. The nuts to be subjected to destructive tests may be those on which non-destructive tests have been performed . 4-3 Quality system certification. 4.3.1 Purpose. The purpose of quality system certification
47、 is to ensure that the manufacturer has demonstrated the acceptability of his quality system and his ability for continuing production of parts to this standard, to the required level of quality, 4-3.2 Requirements and procedure. The requirements and procedures for quality system certification shall
48、 be to the requirements of IS09002 and EN3039. 4.4 Responsibility for inspection and tests. The manufacturer is responsible for the performance of all inspection and test requirements as specified herein. Each manufacturer will use their own or exceptionally, any other facilities approved in accorda
49、nce with 4.1 and 4.2 for the implementation of these inspection and test requirements- 4.5 Inspection and test report. A test report showing actual numerical values shal be provided at the purchasers option as part of the terms of the purchase order- Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with
