1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication prEN 3777 C3 Chairman Comments should be sent within six months after the date of Publication to Edition P 1 July 1999 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES (AECMA) Gulledelle 94 - 8-1200 BRUXELLES - Tel.
2、(+32) 2 775 81 1 O - Fax. (+32) 2 775 81 11 ICs: 49.035 I49.100 Descriptors: aircraft industry, characteristic, requirement, test, quality assurance, qualification inspection, acceptance inspection ENGLISH VERSION Aerospace series Pins, quick release, single and double acting Technical specification
3、 Srie arospatiale Broches dmontage rapide, simple et double action Spcification technique Luft- und Raumfahrt Kugelsperrbolzen mit Zugauslsung und Zug- Druckauslsung Technische Lieferbedingungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of AECMA (The European Ass
4、ociation of Aerospace Industries). If is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Technical Committee following comment by the Member countries. Subsequent to the publication of this Prestandard, the technical content s
5、hall not be changed to an extent that interchangeabiiify is afiected, physically or functionally, without re-identification of the standard. Affer examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Oficial Services of the Member countries it will be sub
6、mitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. 1999-07-30 AECMA Gulledelle 94 B-1200 BRUXELLES Mr Visconti 0 aecma 1999 STDOAECMA PREN 3777-ENGL 1997 1012311 001b355 q27 = Page 2 prEN 3777: 1999 Contents Page 1 2 3 4 4.1 4.2 5 6 6.1 6.2 7 7.1 7.2
7、 8 9 Scope . Normative references Terms and definitions . Classification . Single acting pin Double acting pin . . Requirements . Quality assurance . Approval of the manufacturer Product qualification Acceptance conditions . Inspection and tests . Rejection and re-test Certificate of conformity Fili
8、ng of documents 3 3 4 4 4 4 4 8 8 8 8 8 8 9 9 STDiAECMA PREN 3777-ENGL 1777 H 1012311 001b35b 3b3 Page 3 prEN 3777: 1999 1 Scope This standard specifies the characteristics, qualification and acceptance requirements for quick release pins, single and double acting for aerospace applications. It is a
9、pplicable whenever referenced. 2 Normative references IS0 2859-1 Sampling procedures for inspection by attributes - Part I : Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection EN 2000 Aerospace series - Quality assurance - EN aerospace products - Approval of the quali
10、ty system of manufacturers EN 2002-1 Aerospace series - Test methods for metallic materials - Part 1 : Tensile testing at ambient temperature 1) EN 2002-7 Aerospace series - Metallic materials - Test methods - Part 7: Hardness Test EN 2424 Aerospace series - Marking of aerospace products EN 3042 Aer
11、ospace series - Quality assurance - EN aerospace products - Qualification procedures EN 3238 Aerospace series - Metallic materials - Test methods - Shear test for rivet wires and rivets in metallic materiais except aluminium alloys 2) NASM 131 2 Fastener Test Methods FSP 53GP 3, MIL-STD-81 OE MIL-PR
12、F-23827C Grease, Aircraft and Instrument, Gear and Actuator Screw, NATO Code Number G-354 4, Environmental Test Methods and Engineering Guideline 4, 1) Published as AECMA Prestandard at the date of publication of this standard 2) In preparation at the date of publication of this standard 3) Publishe
13、d by: Aerospace Industries Association of America Inc. (AIA), 1250 Eye Street, St N W Suite 1100, Washington DC 20005, USA 4) Published by: Department of Defense (DoD), the Pentagon, Washington, DC 20301, USA 3 Terms and definitions For the purposes of this standard, the following terms and definiti
14、ons apply. 3.1 batch or lot means “inspection batch“ or “inspection lot“. It consists of quick release pins of the same type, size, material and surface protection manufactured under the same conditions and presented for inspection of the same size. 3.2 surface discontinuities 3.2.1 crack break in t
15、he material which may extend in all directions and be intercrystalline or transcrystalline in character 3.2.2 void, hole in the surface as caused, for example, by corrosion pit 3.2.3 score, scratch open surface defect 3.2.4 seams unwelded fold which appears as an open defect in the material 4 Classi
16、fication The quick release pins, single or double acting, can be manufactured with handles of different configuration. 4.1 Single acting pin The release is obtained only by an axial push applied to the actuating button. 4.2 Double acting pin The release is obtained only when the spindle has been mov
17、ed to a release position by an axial push or pull on the actuating button or handle. 5 Requirements See table 1. STD*AECMA PREN 3777-ENGL 1999 BOL23LL DOL6358 136 Page 5 prEN 3777: 1999 Table i Clause Characteristics Requirements Inspection and test method Q a 5.1 Materials In accordance with the pr
18、oduct standard or definition document of conformity issued by the manufacturer of the semi-finished product 5.2 Dimensions and In accordance with the product tolerances standard or definition document 5.3 Masses In accordance with the product standard or definition document 5.4 Marking In accordance
19、 with the product standard or definition document. It shall be legible and shall not adversely affect the material or the functioning of the pins. Standard gauging X Suitable methods X Visual examination X 5.5 Surface appearance 5.6.1 Presence 5.6.2 Type Thickness 5.6.3 Heat treatment Pins shall be
20、free of surface discontinuities liable to have an adverse effect on their characteristics and endurance. See 3.2 for definitions. Applied at the locations specified in the product standard or definition document. Suitable measuring instruments Visual examination X - - X In accordance with the defini
21、tion Visual examination or inspection X doaiment. by chemical reagent in case of doubt (method agreed upon between the manufacturer and the user) thickness of surface coatings. In case of doubt, inspect defective nuts under low magnification after sectioning. In accordance with the definition Device
22、 for measuring the X document. In accordance with the product Standard gauging X standard or definition document 15.8 -1Hardness In accordance with the product standard or definition document. Shank Test according to EN 2002-7 and balls are to be checked, specifically. Pins shall be subjected to the
23、 corrosion According to the NASMI312 test 1 test. salt-spray. The same pins shall be then tested for Upon completion of the test, the conformance to the release actuating pins shall be tested as defined in force values specified in table 2. 5.11 and 5.12. Pins shall be subjected to the sand and Acco
24、rding to the MIL-STDdlO dust test. method 510.1. The same pins shall be then tested for Upon completion of the test, the conformance to the release actuating pins shall be tested as defined in force values speufied in table 2. 5.11 and 5.12. t I continued Page 6 prEN 3777: 1999 Clause 5.1 1 5.12 5.1
25、3 5.14 5.15 continued C haracteristics Release mechanism Locking element Attaching link, ring, handle Ball retention Operability Table 1 (continued) Requirements The release mechanism shall automatically return and remain in the locked position. When the pin release button is depressed to a release
26、position, the pir shall be capable of being pulled out from the bushing of fixture with a force that is twice the maximum release mechanism force in table 2. The locking device of double acting quick release pins shall withstand the minimum tensile values specified in table 2 without failure. The co
27、mplete attachment shall remain intact when subjected to the tensile strength test. Deformation of the link, ring or flag attachment shall not constitute failure. The release mechanism actuating force shall again be measured for conformance to the requirements of table 2 (see 5.1 1). Ball shall be re
28、tained in the shank when subjected to the minimum push out values specified in table 2. The release mechanism shall be operable while the pin is shear loaded to the following percentages of the minimum strengths specified in table 2. 050 pin diameter code = 35 % 060 to 200 pin diameter codes = 50 %
29、220 to 270 pin diameter codes = 40 % Inspection and test method Mount the pin in a fixture conforming to the figure 3. The release mechanism actuating force values shall be within the range specified in table 2. Upon completion of the test, the pins shall be tested as defined in 5.12. Mount the pin
30、in a fixture conforming to the figure 2,When the pin release button is depressed to the release position, the pin shall be capable of being pulled from the bushing. Mount the pin in accordance with the figure 3. Apply a force of 44 N between the link or ring on the handle and the release mechanism.
31、When a flag is attached the same force shall be applied between the flag and the release link or ring. All parts shall show no evidence of failure. The spindle and one ball shall be removed from the test sample. The sample shall be placed on a ?V? block with the remaining ball in the staked hole pla
32、ced downwards in a position not allowing contact with any portions of the ?V? block. A mandrel connected to a direct- reading load indicator shall be inserted through the empty top hole and the load specified in table 2 applied against the ball in the bottom staked hole. Mount the pin in a fixture c
33、onforming to figure I. The requirements shall be in accordance with values requested for the respective dimensions. STD=AECHA PREN 3777-ENGL 1977 H 1OL231L 00Lb3b0 89Li H Page 7 prEN 3777: I999 Table I (continued) _ Clause ,I6 -17 .I8 .I9 .20 i21 5.22 continued 2haracteristics Indurance Straightness
34、 in shear strength in tension ;trength dandle tensile strength Tem perature Preservation and packaging Requirements The pin shall function satisfactorily after the release mechanism is subjected to 5 o00 cycles of operation. The maximum permissible measured deviation from straightness of the shank s
35、hall be in accordance with table 3. The minimum double shear strength shall conform to the values of table 2. The minimum tensile strength shall conform to the values of table 2. The handle when subjected to 2,2 kN tensile load, shall show no evidence of failure or distortion. Pins shall function sa
36、tisfactonly and be hand operable at temperatures from - 54 “C to 93 “C. Pins shall be wrapped with barrier tc ensure adequate protection against damage during handling transportation and storage. It shall be cleaned so that they are free fror dirt and foreign matter. Grease with lubricant MIL-PRF-23
37、827. Inspection and test method Mount the pin in a fixture conforming to figure 3. The actuating force shall be within the values in table 2. One cycle of operation shall be as follows: For single acting pins, from locked position, push to unlocked position, release to locked position. For double ac
38、ting pins, from the locked position, push to the unlocked position, release to locked position, then from locked position, pull to unlocked position and release to locked position. Upon completion of the test, the pins shall be tested as defined in 5.11 and 5.12. An acceptable method of determining
39、shank straightness is by rolling the pin, with the locking balls retracted, on a surface plate and measuring the point of greatest deviation with a feeler gauge. Test according to EN 3238. Use fixture conforming to figure 1. Test according to EN 3238. Use fixture conforming to figure 2. Test accordi
40、ng to EN 2002-1. Use fixture conforming to figure 4. Pin shall be held at a temperature of not less than - 54 “C for one hour, and at a temperature of not less than 93 “C for one hour. Upon completion of the test, the pins shall be tested as defined ir Page 8 prEN 3777: 1999 Table 1 (concluded) Clau
41、se 5.23 5.24 Characteristics Packing Identification (La belling) Requirements Pins shall be delivered in strong, durable and sealed packages, capable of protecting from physical and corrosive deterioration. Additional packaging requirements shall be specified in the order. Each package shall contain
42、 quick release pins of only one type, size, material and finish protection. Durable extemal labels on the package shall contain the following information: - Identity block (conforming to the product standard); - Description; - Quantity; - Manufacture identity (name and address); - Number of lot; - M
43、anufacturer inspection stamp; - Packaging date. Inspection and test method Q a A a Q = Qualification test A = Acceptance test Inspection applicable only to electrolytic platings (cadmium, silver etc.) 6 Quality assurance 6.1 Approval of the manufacturer See EN 2000. 6.2 Product qualification See EN
44、3042 and table 4. No change in the material or design is permitted without prior approval of qualification authorities who guaranteed the initial approval. 7 Acceptance conditions 7.1 Inspection and tests The inspection and tests to the performed acceptance of the supplying lot shall be in accordanc
45、e with table 4. Samples shall be selected from each lot (batch) in accordance with the procedures listed in IS0 2859-1. 7.2 Rejection and re-test Batches declared unacceptable shall be resubmitted for reinspection only after all defective units have been removed and/or defects have been corrected. T
46、wice the normal sample size shall be used for reinspecting or retesting the attribute causing initial rejection. The same acceptance level shall be used. 8 Certificate of conformity Steel min. All the quick release pins supplied in accordance with this standard shall be accompanied by a certificate
47、of conformity from the manufacturer. Corrosion resisting steel min. 9 Filing of documents For each lot the manufacturer shall keep, for five (5) years minimum, the recording of the tests carried out on each inspection lot. They shall be despatched to the client, at his request throughout this period
48、. 050 060 Table 2 21,88 24,62 0,44 31,69 35,65 0,92 22,6 Pin diameter code 080 1 O0 120 140 56,70 63,8 23 31,4 88,97 100,l 2,84 128,46 144,52 4,64 175,18 197,08 5,68 44,2 Locking element tensile strength kN 160 229,14 257,78 180 290,33 326,62 200 358,75 403,60 220 434,41 488,68 240 517,30 581,93 250
49、 561,45 631,6 270 656,86 746,46 t min. 8,28 11,8 15,6 57,9 17,5 21,8 24,2 110 25,6 (*I Release mechanism actuating force N Pin diameter code Permissible deviation from straightness mm per mm of pin grip length max. 050 0,004 - max. 060 to 080 100 to 120 0,003 0,0025 2 140 min. 0,002 494 8.8 13.4 17,9 30,9 (*) Locking element push out N min. 44.5 66,7 133,5 Table 3 Table 4 I Inspection or test Defined Qualification in Acceptance IS0 2859-1 (Number of Samples) Control level II 100 % Sampling AQL I I Non destructive I Dimensions and tolerances - Shank diameter - Gr
