1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 31 January 2005 prEN 41 11 Edition P 2 January 2005 Comments should be sent within six months after the date of publication to AECMA-STAN PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION $!a%d Gulle
2、delle 94 - B-1200 Brussels - Tel. + 32 2 775 8110 - Fax. + 32 2 775 81 11 - www.aecma-stan.org ICs: Descriptors: ENGLISH VERSION Supersedes Edition P 1 July 1997 Aerospace series Wrenches, splined, socket for pipe fittings Tech ni cal specif cat ion Srie arospatiale Cls et embouts cannels, tuyauter
3、Spcification technique Luft- und Raumfahrt Ringschlssel, offen, verzahnt Technische Lieferbedingungen This “Aerospace Series“ Prestandard has been drawn up under the responsibilify of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published for the needs of th
4、e European Aerospace Industry. It has been technically 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
5、, without re-identification of the standard. After examination and review by users and formal agreement of AECMA-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 n
6、ational members have then to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Mechanical Domain I I Copytight 2005 O by AECMA-STA1 Page 2 prEN 41 11 :2005 Foreword This standard was reviewed by th
7、e Domain Technical Coordinator of AECMA-STANS Mechanical Material Domain . After inquiries and votes carried out in accordance with the rules of AECMA-STAN defined in AECMA- STANS General Process Manual. this standard has received approval for Publication . Contents Page 1 Scope 3 2 Normative refere
8、nces . 3 3 4 4.1 4.2 4.2.1 4.2.2 4.2.3 4.3 4.4 5 5.1 5.2 5.3 Terms and definitions Required characteristics Materials Physical characteristics Surface condition/appearance . Characteristics of the inner profile of the splines Mechanical characteristics Dimensions and tolerances Test methods . Test e
9、quipment Test on splined wrenches and sockets . Conduct of the test Surface coating 3 3 3 3 3 3 3 4 4 4 4 4 4 6 Quality assurance 5 6.1 Qualification 5 6.2 Acceptance 5 7 Marking/packaging 5 7.1 Marking . 5 7.2 Packaging 6 Page 3 prEN 41 11 :2005 1 Scope This standard specifies the requirements whic
10、h must be met by hand-operated splined wrenches and sockets for aerospace applications. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition o
11、f the referenced document (including any amendments) applies. IS0 4156, Straight cylindrical involute splines - Metric module, side fit - Generalities, dimensions and inspection IS0 6508 (all parts), Metallic materials - Rockwell hardness test EN 91 33, Aerospace series - Qualify management systems
12、- Qualification Procedure for Aerospace Standard Patts 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 batch a batch consists of wrenches or sockets of the same types and of the same materials defined by the same standard 4 Required
13、characteristics 4.1 Materials The materials shall meet the required characteristics specified in the product standard. 4.2 Physical characteristics 4.2.1 Surface condition/appearance The hand-operated wrenches or sockets shall be free from pitting, deposits, forging flashes, cracks, splits, burrs an
14、d other defects liable to impair their characteristics and their endurance and to cause injury to operators. 4.2.2 Surface coating The surface coating shall be that laid down in the product standard. 4.2.3 Characteristics of the inner profile of the splines All of the splines shall be free from burr
15、s and rough spots. The surface roughness is specified in the product standard. 1) Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 41 11 :2005 4.3 Mechanical characteristics The strength and endurance of the various types of wrench are tested by torque tests, th
16、e procedures for which are described in 5. At the end of the strength and endurance test, the wrenches or sockets shall not exhibit deterioration or distortion as defined below: - The tips of the splines shall not exhibit rounding or fretting and shall be in accordance with the characteristics descr
17、ibed in 4.2.3; - The wrench or socket shall be free from cracks; - The general surface condition shall be in accordance with the requirements of 4.2.1; - Distortion of more than 0,05 mm of the outer diameter of the sockets and wrench heads; - The surface coating shall show no significant sign of det
18、erioration or flaking; - Permanent distortion of the wrench handle of more than 5“; - A Rockwell hardness test (IS0 6508) shall demonstrate values in accordance with the values indicated in the product standard. 4.4 Dimensions and tolerances The dimensions and tolerances shall be in accordance with
19、requirements of the product standard. 5 Test methods 5.1 Test equipment The wrenches or sockets are fitted on a splined test mandrel. The mandrel dimensions for a relevant wrench shall be based on the maximum corresponding values for an external 45“ pressure angle - side fit - root radius - 6H splin
20、e to IS0 4156, and a hardness of 60 HRC. 5.2 Test on splined wrenches and sockets The wrenches or sockets shall be fully engaged on the mandrel; during the test, the wrench shall be moved smoothly without knocks and jerks. The load shall be applied as far away as possible on the arm of the wrench or
21、 at the driving square of the sockets, perpendicularly to the axis, continuously and progressively up to the torque value appropriate to the wrench under test. 5.3 Conduct of the test On each wrench or socket tested, carry out a cycle of 500 applications, at maximum rate of 60 per minute, at the end
22、urance torque indicated in Table 1. At the end of each 100 applications, apply the resistance torque, which is equivalent to 13 times the endurance torque indicated in Table 1, and move the wrench 1/8 of a turn. In the case of double-ended wrenches, each end shall be tested. Page 5 prEN 41 11 :2005
23、Resistance torque Nm Table 1 - Resistance and endurance torque values Endurance torque Nm DN a 4 27 18 12 13 I 6 I 42 I 28 62 42 66 44 I 8 I 48 I 32 16 18 I 10 I 54 I 36 83 55 98 65 32 I 14 I 71 I 47 21 8 145 I 20 I 128 I 85 I 22 I 158 I 105 I 25 I 188 I 125 6 Quality assu rance 6.1 Qual if cat ion
24、EN 9133: Requirement for IS0 9000:2000 not applicable. Qualification tests specified in this document shall be applied to each type and each dimensional combination of wrench of socket in accordance with Tables 2 and 3. Some or all of these tests may also be used for acceptance of function where a m
25、ore comprehensive test proves necessary. 6.2 Acceptance The aim of the acceptance tests is to check, as simply as possible, that wrenches or sockets from different batches satisfy the requirements of this standard. The acceptance tests shall be conducted on wrenches or sockets chosen at random from
26、different production batches in accordance with Tables 4 and 5. 7 Marking/packaging 7.1 Marking The marking is specified in the product standard. Page 6 prEN 41 11 :2005 Non destructive 7.2 Packaging The packaging of the wrenches or sockets is left to the choice of the manufacturers. Dimensions and
27、tolerances Marking Surface condition/appearance Surface coating Characteristics of the inner profile of the splines Table 2 - Summary of qualifications and production acceptance tests Characteristics I Qualification I Production acceptance 4.4 5 4.4 Table 4 7.1 5 - - 4.2.1 5 4.2.1 Table 4 4.2.2 2 4.
28、2.3 2 4.2.3 Table 4 - - I Ciause I Sample size I Ciause I Samplesize Test methods Mechanical characteristics 5 4 5 Table 5 - - 4.3 4 Type of test Destructive Wrench or socket sample number 1 2 3 4 5 Defined in Dimensions and tolerances Marking 4.4 X X X X X 7.1 X X X X X Non destructive Surface cond
29、ition/appearance 14.2.11 X I X I X I X I X Page 7 prEN 41 11 :2005 Production size Table 4 - Sampling plans for visual inspections and dimensional characteristics Sample size Destructive test Wrench Socket Batch size Sample size Acceptance number (Ac) and limiting quality (LQ) in accordance with the acceptable quality level (AQL) I AQL 23 % I Ac I LQio % I 20 3 I 21 to50 I 5 I I 51 to90 8 O I 91 to 150 I 10 I 1 I 90 I 2 151 12 2 80 Table 5 - Sampling plans for torque test + 21 to50 O O 91 to 150 1 x2a 1 I 2 151 2x2a 2 I a Ateachend
