AECMA PREN 4673-002-2009 Aerospace series Inserts UNJ threads self-locking with self-broaching keys Part 002 Design standard Edition P 1《航空航天系列.带自拉孔键的自锁UNJ螺纹插件.第002部分 设计标准.版本P0》.pdf

1、ASD STANDARD NORME ASD ASD NORM prEN 4673-002 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 002: Design standard Srie arospatiale Douilles filetes, filetage UNJ, freinage interne, clavettes autobrochantes Partie 002 : Norme de conception Luft- und Raumfahrt Gewindeeinstze, UNJ-Gewinden, selbstsichernd, mit selb

3、strumenden Stiften Teil 002: Konstruktionsnorm 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 Industry. It has been tech

4、nically 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-identification of the standard. Af

5、ter 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 to implement the EN at

6、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 Domain Copyright 2009

7、by ASD-STAN Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4673-002:2009 (E) 2 Contents Page Foreword2 1 Scope 3 2 Normative references 3 3 Design .3 4 Use 4 5 Required characteristics.6 6 Installati

8、on8 7 Provisions for component salvage8 8 Designation 9 9 Indication on drawings9 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Mechanical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Proces

9、s Manual, this standard has received approval for Publication. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4673-002:2009 (E) 3 1 Scope This standard specifies the applications and installation hol

10、e dimensions for EN standard, self-locking, self-broaching key, UNJ threads inserts and provisions for component salvage, for aerospace applications. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the editi

11、on cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 4673-001, Aerospace series Inserts, UNJ threads, self-locking, with self-broaching keys Part 001: Installation and removal procedure. 1)EN 4673-003, Aerospace series Inserts

12、, UNJ threads, self-locking, self-broaching keys Part 003: Technical specification. 1)ISO 3161, Aerospace UNJ threads General requirements and limit dimensions. 3 Design Typical examples of installed inserts are shown in Figures 1 and 2. 3.1 The threaded self-locking inserts may be used in tapped bl

13、ind holes and tapped through holes. The minimum flange thickness dimensions K given in Tables 3 to 5 are less than the insert length. When using these minimum flange thicknesses, protrusion of the inserts will occur (see Figure 5, footnote a). Designers must therefore ensure that the inserts do not

14、protrude into an abutment face or foul any other adjacent features. 3.2 The installed insert is compatible with UNJ threaded bolts to ISO 3161. 3.3 The minimum selected bolt length shall ensure full thread engagement with the insert (see Figures 1 and 2). 3.4 These screw thread inserts may be used i

15、n aluminium alloys and in harder materials, such as heat resistant steels and titanium alloys. 3.5 During the design of the fitted flange, overall dimensions of the tools shall be taken into account as specified in EN 4673-001. 1) Published as ASD-STAN Prestandard at the date of publication of this

16、standard. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4673-002:2009 (E) 4 C11Key 1 1,5 pitches minimum Key 1 1,5 pitches minimum Figure 1 Figure 2 4 Use 4.1 General A self-locking self-broaching k

17、ey insert as shown in Figure 3 is a sleeve of metal which is threaded both internally and externally, with 2 or more self-broaching keys. These inserts are screwed into tapped holes (see 5.1) and are fixed by broaching the keys into the thread of the component (see Figures 1 and 2) thus preventing t

18、he insert moving during the installation or removal of a bolt. The self-locking zone of these inserts is positioned at the opposite side from the key side. Key 1 Keys to be broached into the thread of the parent component 2 Formed out-of-round to achieve self-locking feature Figure 3 Copyright ASD-S

19、TAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4673-002:2009 (E) 5 4.2 Performance The inserts according to EN 4673-003 have a minimum performance of 25 re-uses at ambient temperature and 5 re-uses after baking at

20、the maximum operating temperature given on the product standard. The self-locking torque values for the inserts are given in Table 1. These are the values required to achieve the minimum re-usability performance at ambient temperature in accordance with the technical specification of the inserts. Ta

21、ble 1 Self-locking torque Nm Bolt thread diameter min. max. .190 0-32UNJF 0,23 3,40 .250 0-28UNJF 0,40 6,78 .312 5-24UNJF 0,73 13,56 .375 0-24UNJF 1,07 18,08 .437 5-20UNJF 1,58 22,60 .500 0-20UNJF 2,03 33,90 4.3 Installation restrictions In applications where it is necessary to pass items through th

22、e installed insert, care shall be taken to ensure that such items do not foul the locking feature of the insert. The maximum diameter X that can be passed through the insert is illustrated in Figure 4 and dimensions are given in Table 2. Figure 4 Copyright ASD-STAN Provided by IHS under license with

23、 AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4673-002:2009 (E) 6 Table 2 Dimensions in millimetres Bolt thread diameter X max. .190 0-32UNJF 3,0 .250 0-28UNJF 4,1 .312 5-24UNJF 5,4 .375 0-24UNJF 6,7 .437 5-20UNJF 7,5 .500 0-20UNJF 8,55 Required chara

24、cteristics 5.1 Installation hole See Figure 5 and Tables 3 to 7. Dimensions in millimetres KaX90 5120 512GLbE 0,08 Y AX 0,01 KYKey 1 Pitch diameter 2 Boss diameter aK allows total installation of the threaded part of the insert with 0,75 mm under-flush max. The locking feature of the insert may prot

25、rude. bL min. K 5 pitches. Allows automatic tapping. Figure 5 Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4673-002:2009 (E) 7 Table 3 Codified dimensions of holes for normal size inserts Dimension

26、s in millimetres A K L Diameter code Bolt thread diameter a Installation hole diameter a+ 0,2 0 min. min. 3-0 .190 0-32UNJF .312 5-18UNJC-3B 8,9 6,75 13,8 4-0 .250 0-28UNJF .375 0-16UNJFC-3B 10,5 8,75 16,6 5-0 .312 5-24UNJF .437 5-16UNJ-3B 12,1 10,25 18,1 6-0 .375 0-24UNJF .500 0-16UNJ-3B 13,7 12,25

27、 20,1 7-0 .437 5-20UNJF .562 5-16UNJ-3B 15,2 14,25 22,1 8-0 .500 0-20UNJF .625 0-16UNJ-3B 16,8 16,25 24,1 aAccording to ISO 3161. Table 4 Codified dimensions of holes for first repair size inserts Dimensions in millimetres A K L Diameter code Bolt thread diameter a Installation hole diameter a+ 0,2

28、0 min. min. 3-1 .190 0-32UNJF .375 0-16UNJC-3B 10,5 8,75 16,6 4-1 .250 0-28UNJF .437 5-16UNJ-3B 12,1 10,25 18,1 5-1 .312 5-24UNJF .500 0-16UNJ-3B 13,7 12,25 20,1 6-1 .375 0-24UNJF .562 5-16UNJ-3B 15,2 14,25 22,1 7-1 .437 5-20UNJF .625 0-16UNJ-3B 16,8 16,25 24,1 8-1 .500 0-20UNJF .687 5-16UNJ-3B 18,4

29、 17,25 25,1 aAccording to ISO 3161. Table 5 Codified dimensions of holes for second repair size inserts Dimensions in millimetres A K L Diameter code Bolt thread diameter a Installation hole diameter a+ 0,2 0 min. min. 3-2 .190 0-32UNJF .437 5-16UNJ-3B 12,1 10,25 18,1 4-2 .250 0-28UNJF .500 0-16UNJ-

30、3B 13,7 12,25 20,1 5-2 .312 5-24UNJF .562 5-16UNJ-3B 15,2 14,25 22,1 6-2 .375 0-24UNJF .625 0-16UNJ-3B 16,8 16,25 24,1 7-2 .437 5-20UNJF .687 5-16UNJ-3B 18,4 17,25 25,1 8-2 .500 0-20UNJF .750 0-16UNJF-3B 20,0 18,25 26,1 aAccording to ISO 3161. Copyright ASD-STAN Provided by IHS under license with AE

31、CMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4673-002:2009 (E) 8 Table 6 Minimal dimensions of holes Dimensions in millimetres Without provision With provision for repair for one repair for two repairs Bolt thread diameter E amin. G bmin. E amin. G bmin

32、. E amin. G bmin. .190 0-32UNJF 5,1 14,5 6,0 17,5 6,9 21 .250 0-28UNJF 6,0 17,5 6,9 21 7,8 24 .312 5-24UNJF 6,9 21 7,8 24 8,7 27 .375 0-24UNJF 7,8 24 8,7 27 9,6 30 .437 5-20UNJF 8,7 27 9,6 30 10,5 33 .500 0-20UNJF 9,6 30 10,5 33 11,4 36 aE min. allows a minimum thickness equal to about 1,5 mm. bG mi

33、n. allows a minimum diameter equal to about 1,7 time the nominal installation thread diameter. 6 Installation According to EN 4673-001. Inserts shall be installed between 0,25 mm and 0,75 mm below the surface of the component. 7 Provisions for component salvage When inserts are selected for a design

34、, consideration shall be given to the feasibility of component salvage where the original hole could be damaged during manufacture, or where the hole is machined out of position. Before provision is made for component salvage, consideration shall be given to component cost/mass requirements, e.g. fo

35、r an inexpensive component salvage may not be an economic proposition, whereas an expensive component may necessitate salvage. Where provision for salvage is made, the component will be heavier because of the increase in wall thickness around the tapped holes. In the event of component salvage actio

36、n, hole preparation, repair size insert selection and installation shall be in accordance with EN 4673-001. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4673-002:2009 (E) 9 8 Designation EXAMPLE De

37、scription block INSERT Identity block EN4673-002-5-0 Number of this standard Diameter code (see Tables 3 to 5) NOTE The last digit corresponds to: Size code: 0 Normal size 1 First repair size 2 Second repair size 9 Indication on drawings 9.1 Methods of drawing Installation hole can be indicated on d

38、esign drawing in 3 different manners given hereafter: A use of standard codification of holes given in chapter “Designation“; B use of standard codification of holes given in chapter “Designation“ amended on drawing by different requirements; C give all dimensions and tolerances of the hole and boss

39、 on the drawing. NOTE 1 Above method A is recommended. NOTE 2 In case of boss, it shall be dimensioned on the drawing. CAUTION It is important to check that the bolt does not interfere with the bottom of the hole notably when method A is used. In case of possible interference method B or C above sha

40、ll be used. With method A, the drilling maximal depth is not limited; it cannot assume minimum thickness of material. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 4673-002:2009 (E) 10 9.2 Examples

41、of definition drawing See Figure 6 to 8 for example of design with boss. 23 117 125 117 118 0,523 117 1x 12 0,1120 5 0,08x 0,17YMJ10 x1-4H5H8 min.90 5C18 1YKey 1 Hole to EN 4673-002-6-0 Key 1 Hole to EN 4673-002-6-0 Key 1 Pitch diameter Figure 6 Method A Figure 7 Method B Figure 8 Method C 9.3 Examp

42、le of assembly drawing See Figure 9. 1Key 1 Insert EN4673-004-6-0 installed to EN4673-001 Figure 9 Lubricant or other product to apply on external thread of the insert shall be specified in the above key when applicable. Inserts installed in aluminium or magnesium alloy components, for example, should be lightly smeared externally with a suitable compound to prevent galvanic corrosion. Copyright ASD-STAN Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-