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 Contents. 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.
8、3.6). Critical defect. 3-7)- Major defect. 3.8). Minor defect. 3.9). Sampling plan. 3.10).Limiting quality. 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 torq
9、ue. AECMA PREN3005 87 LOL23Ll 0004bOb L 9 I prEN3005 Page 2 4).Certification and quality assurance. 4.1). 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
10、methods. 5.1). Materials. 5.2). Dimensions;tolerances of form and position; 5.3). Manufacturing. 5.4). 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
11、Table 4.: Load values os Axial strength: Wrench threads and quality production acceptance. nut samples. 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
12、 7.: Sampling plans for visual inspections and Table 8.: Sampling plans for the inspection of dimensional characteristics- mechanical and metallurgical characteristics. Table 9.: Maximum depth of permissible discontinuities. I a O 1.Scope and field of application This standard specifies tRe technica
13、l; 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. Primarily for Aerospace applications it is applicable to such self locking nuts when reference
14、d 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 inspection by attributes - Part 1: Sampling plans indexed by acceptable quality level(AQL) for lot b
15、y lot inspection. 4)- Non destructive testing - Penetrant inspection - General principles Non destructive testing - Liquid penetrant inspection - Means of verification Statistics - Vocabulary and symbols Aerospce - Fasteners - self locking nuts with maximum operating temperature greater than 425OC -
16、 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). Aerospace Series - Heat resisting nickel base alloy NL-P101-HT - Solution treated and cold work
17、ed - 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 - Quality systems: supplementary requirements to IS09002 applicable to the manufacture/process
18、ing of materiel for propulsion standard parts. 3). Aerospace series - Propulsion standard parts - Manufacturing process - change procedure for qualified parts. 3). Aerospace series - Propulsion standard parts - Qualification procedure. 2). Aerospace Series - Heat resisting nickel base alloy NI-Pli-H
19、T - 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) published as AEm standard 2) Published as AEW pre-standard 3) in cwrse of preparation 4) At
20、present at the stage of draft.(Revicion, in part of Is0 2859-1974 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 numb
21、er and diameter, 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
22、 extend in 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 exten
23、ding longitudinally. 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
24、of n items 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, maintai
25、ning, or 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 pur
26、pose. 3.8 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 ac
27、cording to which one or more samples are taken in order to obtain information and possibly to reach a decision. 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 accep
28、tance- It is the iimiting lot quality characteristic that a lot of this quality would occur, When expressed as a 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
29、 relatively high probability of acceptance. It is the maximum per cent defective (or the maximum number of defects 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 trea
30、tments and/or surface coatings, as specified in the product standard OF drawing. 3.53 Drawing : Document specifying 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
31、the nut or bolt to maintain movement o rotation in relation to the associated part, the assembly being under no 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 applie
32、d to the nut or bolt to introduce or to increase the axial load in the assembly, 3.16 Unseating torque : The untightenlng 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
33、 respect to the associated part, with the nut locking device 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. 3.18 Wrench torque : The tightening and untightening torques which the driving
34、feature of the nut shall withstand, repeatedly, without any permanent deformation which would prevent the appropriate 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_-_-_-_-_-_- AECMA PREN3005
35、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 of qualification tests is to ensure that the nut design and nut manufacturing conditi
36、ons 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 manufacturing source or procedure shall be subject to the requirements of EN3041 - 46 nuts sele
37、cted 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, The tests to be applied to each nut are shown in table 2. The test programme may po
38、ssibly 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 acceptance, when a reinforced inspection seems to be necessary, or to survey nuts that
39、 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. The quallfication test requirements and procedures shall be to the requirements of
40、EN3042. 4.1.4 Qualified manufacturers. A list of qualified manufacturers for specific standard parts is listed in CN/TR3040. 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 in
41、herant to statistical 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 fro
42、m the batch to be 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 sy
43、stem certification 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 c
44、ertification shall 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 a
45、pproved in accordance 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- AECMA PREN3005 87 9 LOL23LL 000
46、YbL2 7 m-1 AECMA PREN3005 89 W - LOL2311L 0004bL3 9-1, prEN305 Page 9 5.3.2 I I I l I I 1 I I l I I 1 i I l I I I I I l r I I I I I I l I l I I I I l i Heat treatmt:The heat treataent mediu or atmo-:The heat treatsent equipient I 1 I 1 1 l 1 I l I I I 1 I I :sphere shall not cause any surface:shall
47、be approved. I i Iconhination exwt that on unia-: I I :chined surfaces depth of oxide f l :penetration to 0,025ii is I l l tpedssible. noChined surfaces to t I :be free fm surface oxide. I l :Nuts ford Solupn t9t at a temperature of: I :fror bar or :i010 - 1080 C holding at the : I iselected teapera
48、ture uithin i15OC ; :wire I 1 I ifor not less than L hour and-oii r l (quench or equivalent or faster. f I l :Sta/jiihotion treatmt at I i l i850 C ta C for 4 hours and air f I l :cool OF faster. pi itaton 1 I R I ftreatmt at 760 C ta C for 16 f I l 1 :hours and cool in air or faster. 1 I ; I :ed by
49、 subsequent iachining shall :blasting shall be approved. : I :be mved by abrasive blasting. : I I I 1 I I l l I I I l I l I :Any scale which will not be mv-:The quipient for abrasive a 1 l I I I I I l I l I l I l I I I I l I I 1 I l I l I I I l I 1 I I I I I I I I i I 1 I I I l I l l I I s I l 1 1 I l 1 r I I I I 4 t I I l l 1 I l I l I I I r I AECMA PREN3005 87 10123LL OOOLlb14 O prEN3005 Page l 15.3.5 I I I l I l I I I l I l I 1 I I l l i I 1 I l l I I l I I I I i Thread Id
