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1、INTERNATIONAL STANDARD IS0 10792-3 -x First edition 1995-07-I 5 Aerospace - Airframe spherical plain bearings in corrosion-resisting steel with self-lubricating liner - Part 3: Technical specification Adronautique - Rotules en acier r d) the starting torque at zero load de- termined in accordance wi
2、th 4 11 shall not exceed the value specified in table 4 4.16 Compatibility At the end of the dynamic load test, Use one spherical plain bearing per fluid X between liner and the requirements specified in 4.15 fluids shall be satisfied Turn the inner ring so that it is perpendicular to the outer ring
3、 In this position, immerse the spherical plain bearings, for 24 h, in the fluids defined in annex C which shall be brought to the following temperatures a) + 70 “ C k 3 “ C for those defined in c 3, b) + 45 “ C + 3 “ C for those defined in C 1 and C 2, c) ambient temperature for that defined in C 4
4、30 min after removing the bearings from the fluids, test in accordance with annex B, under the conditions for testing at ambient temperature follow- ing immersion. 4.17 Resistance of the These requirements and this test shall See annex D X X2 liner to peeling only be applied if there is an indicatio
5、n from the manufacturer that the liner is susceptible to peeling. It shall present a mean peeling resistance of greater than 0,35 N per millimetre of width of the outer ring reduced by 2 mm to eliminate the effects of edges and chamfers 75 % of the recording curve shall lie above 0.35 N/mm 5 Copyrig
6、ht International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:02:15 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 10792-3:1995(E) 0 IS0 No. Characteristics Requirem
7、ents Inspection and test methods 01) A ) 4.18 Bond integrity The liner shall not contain any con- After the test to determine resistance X X taminating substances and shall firmly to peeling, evaluate the location and adhere to the outer ring over at least size of any voids 90 % of the contact area.
8、 If the liner is non-peelable, divide No voids are allowed which cannot be bearings which have been subjected to circumscribed within a circle of diam- radial dynamic loads into sections and eter equal to determine the bond integrity by chip- a) 25 % of the outer ring width, or ping, scraping, abras
9、ion or other appro- priate means. b) 6 mm, whichever is less 1) Q = Qualification test A = Acceptance test 2) For acceptance testing, the resistance to peeling shall be measured immediately after assembly and polymerization Plastic coating Spherical plain bearing Self-lubricating liner Figure 1 Copy
10、right International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:02:15 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 IS0 IS0 10792-3:1995(E) Table 1 - Liner thickness
11、 Dimensions in millimetres Liner thickness, t I Diameter code Entire liner, . except points situated at sitrayeti at Cl1 0 Cl1 0 Metric series ) Inch series*) min max min. max 05 to 25 03 to 16 0,19 0,56 0,19 0,37 Table 2 - Deformations Dimensions in millimetres Diameter code Metric Inch series*) se
12、ries*) Maximum Maximum residual total deformations deformations Load with C, load % 05 to 08 03 to 05 0,25 10to12 06 to 07 0,37 0.08 15to17 08to 10 0,43 20 to 25 12to16 0,5 30 to 40 20 to 24 0,75 O,l 45 to 55 28 to 32 1 0,12 1) See IS0 10792-l 2) See IS0 10792-2 0.12 0,14 0,16 Table 3 - Maximum allo
13、wable wear and tear of the liner Dimensions in millimetres Test Allowable wear and tear with permissible dynamic of the liner radial load, C, max at room temperature at low temperature 0,115 02 Table 4 - Starting torque after permissible dynamic radial load test a) Metric series 05 06 08 10 12 15 17
14、 20 22 25 30 35 40 45 50 55 bl Inch series 9 4 9 6 11 8 18 12 36 22 50 43 60 55 91 - - 130 300 158 595 246 485 355 565 495 765 670 970 885 1 335 - 03 04 05 06 07 08 09 10 12 14 16 20 24 28 32 1) See IS0 10792-I 2) See IS0 10792-2 - - 8 6 11 10 17 13 26 17 37 24 52 34 62 49 93 86 130 119 302 198 393
15、229 554 460 756 668 966 1 096 at hiah temperature I 0,15 I at ambient temperature following Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:02:15 MDTNo reproduction or network
16、ing permitted without license from IHS -,-,- IS0 10792-3:1995(E) 0 IS0 5 Quality assurance 5.1 Manufacturer s approval See IS0 9002. 5.2 Product qualification See tables 5. 6 and 7. Qualification of a spherical plain bearing may be considered to have been acquired if qualification has also been obta
17、ined, following inspections and tests, for the spherical plain bearings situated immediately before and immediately after the spherical plain bearing under consideration, within the range of spherical plain bearings appearing in the product standard. Qualification to either inch or metric series bea
18、rings qualifies a bearing manufacturer to both series. 6 Acceptance conditions 6.1 Manufacturer s responsibility See IS0 9002. 6.2 Inspections and tests to be carried out by the manufacturer Acceptance of a delivery lot shall be carried out in accordance with table 8, with the exception of the sampl
19、ing plan which may be altered with the agree- ment of the customer or of the authority responsible for acceptance. 6.3 Customer quality control Upon reception of a delivery lot, the customer may proceed with his own checks using either partially or totally the specifications given in table 8 to ensu
20、re that the items reach the quality level required and to determine whether the delivery lot is acceptable. This check may be carried out on the premises of the customer or, by special agreement with the manufacturer, at the latter s factory. 7 Packing The spherical plain bearing shall be packed, ei
21、ther individually, or in rolls to avoid deterioration during transportation. They shall be protected against hu- midity, corrosion, any form of dirt and other harmful agents. The packing material in contact with the spherical plain bearing shall satisfy these requirements. The following indications
22、shall appear on each individual packing: a) name and address of manufacturer; b) quantity (for rolls); c) identity block as defined in the product standards or design documents; d) packing date In the case of group packing, the minimum indications shall be as follows: a) manufacturer s name and addr
23、ess; b) contract or order number; c) quantity (i.e. number of items); d) identity block as defined in the product standards or design documents; 8 Certificate of conformity All spherical plain bearings supplied in accordance with IS0 10792 shall be accompanied by a certificate of conformity. Copyrig
24、ht International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:02:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Table 5 - Non-destructive inspections to be carried ou
25、t for qualification I Nature of inspections and tests ) Serial number of samples I 1 234567 8 9 10 11 12 13 14 15 I Materials 4.1 x x x x x Configuration Dimensions and tolerances Masses Marking 4.2 x x x x x 4.3 x x x x x 4.4 x x x x x 4.5 x x x x x 16 17 18 19 20 21 22 23 24 Surface appearance 4.6
26、 x x x x x Hardness 4.7 x x Surface roughness 4.8 x x x x Surface treatment 4.9 x x x x x Behavrour dunng rotation and tilting movements 4.10 x x x x x at ambient temperature 4.11.1 x x Starting torques at low temperaturez) 4.11.2 X with zero load followrng a cycle of extreme temperatures*) 4.11.3 I
27、 I I I I I I I I I I I I I I I I I I I I I I 1 Key- A cross (X) signifies an Inspectron or a test. 1) The order of nondestructive Inspections and tests shall be left to the Initiative of the qualification authority. Tests shall be valid for spherical plain bearings with or without face grooves. 2) F
28、or these tests, the qualification acquired for the diameter code selected from either specified senes of spherical plain bearings (defined In clause 2) shall automatically be valid for all other diameter codes and series. Copyright International Organization for Standardization Provided by IHS under
29、 license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:02:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Table 6 - Destructive inspections and tests to be carried out for qualification Serial number of samples Nature of inspection
30、s and tests ) Tests with statrc Tests with permrssible dynamrc radial load (C,) at low temperature3) Compatibility with flurds test at + 45 “ C 2 3 “ C3r 4.16 x x at ambrent temperature3 X I Tests on the liner peeling3) 4.17 x x x bond rntegrity3 4.18 x x x cross (X) signifies an Inspectron or a tes
31、t. 1) The order of inspections and tests shall be left to the rnitratrve of the qualification authority. 2) Serial numbers 1 and 2 are not used due to potential for damage during exposure to temperature extremes during non-destuctive testing. 3) For these tests, the qualificatron acquired for the di
32、ameter code selected from either specified series of spherical plain bearings shall automatrcally be valid for all other diameter codes and series. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for R
33、esale, 04/19/2007 01:02:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Table 7 - Test distribution to be carried for qualification Series narrow wide Diameter codes Diameter codes Nature of inspections and tests Metric series Metric series” 05 06 08 10 12 15 17 22 25 30
34、 35 40 45 50 05 06 08 10 12 15 17 20 25 30 35 40 45 50 55 Inch series2) Inch series21 03 04 05 06 07 08 09 10 12 14 16 20 24 28 32 03 04 05 06 07 08 09 IO 12 14 16 20 24 28 32 Vlatenals 4.1 x X xx x x x x x x xx x x x x Configuratron 4.2 x X x x x x x x x x xx x x x x 3imensrons and tolerances 4.3 x
35、 X xx x x x x x x xx x x x x Masses 4.4 x X xx x x x x x x xx x x x x Markrng 4.5 x X xx x x x x x x xx x x x x Surface appearance 4.6 X X xx x x x x x x xx x x x x Hardness 4.7 x X xx x x x x x x xx x x x x Surface roughness 4.8 X X xx x x x x x x xx x x x x Surface treatment 4.9 x X xx x x x x x x
36、 xx x x x x Behavrour dunng rotation and tilting movements 4.10 x X xx x x x x x x xx x x x x at ambient temperature 4.11 1 x X xx x x x x x x xx x x x x Starting torques at low temperature 4.11.2 X with zero load followrng a cycle of extreme temperatures 4.11.3 X Compliance of sphencal surfaces 4.1
37、2 X X xx x x x x x x xx x x x x radial permissible 4.13.1 x X x x x x x x x xx x x x x Tests with ultimate 4.14 x X xx x x x x x x xx x x x x statrc load axial permissible 4.13.2 X X X X X x X x X X X X x x x x ultimate 4.14 x X xx x x x x x x xx x x x x Copyright International Organization for Stan
38、dardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:02:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Table 7 -Test distribution to be carried out for qualification (concluded) Nature of inspect
39、ions and tests Tests with permrssible dynamrc radial load Compatibility wrth flurds tests B+45” Cf3” C at ambrent temperature Tests on the liner peeling resistance 4.17 bond Integrity 4.18 NOTE - For a total qualificatron of the four series sphencal plain bearings, the followrng should be carried ou
40、t: - one complete test diameter code 15 (metnc series) or diameter code 08 (inch series11 - 15 partial tests - 14 de facto qualifications In accordance with 5.2 1) See IS0 10792-l 2) See IS0 10792-2. Copyright International Organization for Standardization Provided by IHS under license with ISO Lice
41、nsee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:02:15 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 IS0 IS0 10792-3:1995(E) Table 8 - Inspections and tests to be carried out for acceptance Materials Nature of inspections and tests ) Sampling pla
42、t-9) 41 Manufacturer s certificate of compliance for rough products Dimensions and tolerances 4.3 Marking 45 Surface appearance 46 1 0 % 3) 100% Non-assembled spherical plain bearing. 100 % Assembled spherical plain bearing 10 % a) Hardness 47 1 % per heat treatment lots) I- Surface roughness I 48 5
43、 % 3) I Surface treatment Behaviour during rotation and tilting movements Starting torques with zero load at ambient temperature 49 4 10 411 1 1 % per surface treatment3) 100 % 100 % 3) I -. Test to determine resistance of the liner to peeling 1 4.17 1 1 % 3) I Bond integrity of the liner 418 1 %3)
44、1) The order in which inspections and tests are to be carried out shall be left to the initiative of the qualification authority 2) For the manufacturer, when sampling is not 100 %, any fault noted during an inspection or test of a lot shall require sampling for that feature to be raised to 100 % fo
45、r that lot 3) A minimum of two parts 13 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:02:15 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 107
46、92-3:1995(E) 0 IS0 Annex A (normative) Checking of permissible and ultimate static loads A.1 Radial static loads (C,) A.1 .I Permissible radial static load Mount the spherical plain bearing on a frame as shown in figure A.1 Apply an initial radial load equal to 5 % of C,. Set dial indicator to zero.
47、 Increase the initial load gradually by 1 % per second until the value C, is obtained, ensuring that the load remains in the midplane of the outer ring throughout the test. Maintain load C, for 3 min. Note the value of total deformation indicated on dial indicator. Bring this load gradually down aga
48、in by 1 % per second until the value of the initial load is obtained. Note the value of the permanent deformation indicated on dial indicator. Remove the initial load. Repeat this procedure after rotating one ring through an angle of 180” in relation to the other. A.1.2 Ultimate radial static loads This test follows on from the test described in A.1 .I Apply a radial load of I,5 C,. Remove load. Check spherical plain bearing. A.2 Axial static loads (C,) A.2.1 Permissible axi