NF L52-250-506-2008 Aerospace series - Cables electrical aircraft use - Test methods - Part 506 plating continuity 《航空航天系列 航空器用电缆 试验方法 第506部分 电镀连续性》.pdf
《NF L52-250-506-2008 Aerospace series - Cables electrical aircraft use - Test methods - Part 506 plating continuity 《航空航天系列 航空器用电缆 试验方法 第506部分 电镀连续性》.pdf》由会员分享,可在线阅读,更多相关《NF L52-250-506-2008 Aerospace series - Cables electrical aircraft use - Test methods - Part 506 plating continuity 《航空航天系列 航空器用电缆 试验方法 第506部分 电镀连续性》.pdf(15页珍藏版)》请在麦多课文档分享上搜索。
1、NF EN 3475-506fvrier 2008Ce document est usage exclusif et non collectif des clients Saga Web.Toute mise en rseau, reproduction et rediffusion, sous quelque forme que ce soit,mme partielle, sont strictement interdites.This document is intended for the exclusive and non collective use of Saga Web cus
2、tomers.All network exploitation, reproduction and re-dissemination,even partial, whatever the form (hardcopy or other media), is strictly prohibited.Saga Web Pour SHANGHAI INTERNAT SCIENCE les essuyer laide dun chiffon propre et sec. Aprs nettoyage, les brins ne doivent pas tre touchs avec les doigt
3、s nus. La longueur immerge des prouvettes doit tre dau moins 110 mm. 3.2.2 Brins daluminium revtus de cuivre Prparer trois brins dau moins 150 mm de long en tant quprouvettes. Dgraisser les brins sans les endommager ; les essuyer avec un chiffon propre et sec. Aprs nettoyage, les brins ne doivent pa
4、s tre touchs avec les doigts nus. 1) Publie par : American Society for Testing and Materials (ASTM), 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, USA. EN 3475-506:2007 (E) 5By using gloves, wind five turns of each strand on a mandrel which the diameter is about 12 times the
5、strand diameter. NOTE Due to hardness differences between, aluminium, copper and coating (particularly nickel) materials and possible associated drawbacks during strand drawings after plating, turns are necessary to reveal possible weakness. 3.3 Strands after stranding or screening 3.3.1 General Due
6、 to the above restriction by the ASTM in recognition of the abrasion to the wire inherent in the stranding or in the screening process, the following preparation of specimens apply when testing stranded or screened product: 1) Unilay or Concentric constructions to be tested as the whole conductor. 2
7、) Two members from each layer of rope constructions to be tested after they have been carefully removed from the finished rope. 3) Screen to be tested as whole conductor after it has been carefully separated from cable jacket and from inner core(s). 3.3.2 Copper conductors or copper screens Prepare
8、three samples at least 150 mm long as specimens. Degrease the specimens without damaging them and wipe them with a clean dry cloth. After cleaning, the specimens shall not be touched with bare fingers. The length of the specimen which is immersed shall be at least 110 mm. 3.3.3 Copper-clad aluminum
9、conductors Prepare three samples at least 150 mm long as specimens. Degrease the specimens without damaging them and wipe them with a clean dry cloth. After cleaning, the specimens shall not be touched with bare fingers. By using gloves, wind five turns of each conductor on a mandrel which diameter
10、is about 12 times the conductor diameter. 4 MethodPlace the specimens for 30 s in a sodium polysulphide solution which has a density of 1,142 g/cm3 at 20 C, then wash them carefully in distilled water. In addition, for silver plating, the samples shall then be immersed for 15 s in a solution of hydr
11、ochloric acid which has a density of 1,088 g/cm3 at 20 C. The specimens shall then be washed carefully again in distilled water. 5 Requirements Examination shall occur immediately after the solution cycle. There shall be no adherent or distinctly visible black spots when examined with the naked eye.
12、 Any blackening occurring less than 15 mm from each end shall be disregarded. EN 3475-506:2007 (F)5Muni de gants, enrouler chaque brin en faisant cinq tours autour dun mandrin dont le diamtre est environ 12 fois le diamtre du brin. NOTE En raison des diffrences de duret entre les matriaux en alumini
13、um, en cuivre et de revtement (notamment le nickel) et des inconvnients correspondants susceptibles de survenir pendant les oprations dtirage des conducteurs aprs revtement, il est ncessaire de faire des tours de faon rvler une ventuelle faiblesse. 3.3 Brins avant toronnage ou blindage 3.3.1 Gnralit
14、s En raison de la restriction ASTM indique ci-dessus concernant labrasion du cble inhrente au processus de toronnage ou de blindage, la prparation suivante des prouvettes est applicable aux essais relatifs un produit toronn ou blind : 1) Compositions monocouches ou concentriques tester de la mme fao
15、n que le conducteur complet. 2) Deux lments issus de chaque couche des compositions de cbles tester aprs avoir t soigneusement retirs du cble fini. 3) Blindage tester de la mme faon que le conducteur aprs lavoir soigneusement dissoci de la gaine du cble et du/des fils internes. 3.3.2 Conducteurs en
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