1、BRITISH STANDARDBS ISO 12301:2007Plain bearings Quality control techniques and inspection of geometrical and material quality characteristicsICS 21.100.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55
2、g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 12301:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2007 BSI 2007ISBN 978 0 580 56495 6National forewordThis British Standard is the UK implementation of ISO 12301
3、:2007. It supersedes BS 7679:1993 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MCE/12, Plain bearings.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all
4、 the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsReference numberISO 12301:2007(E)INTERNATIONAL STANDARD ISO12301Second
5、edition2007-10-15Plain bearings Quality control techniques and inspection of geometrical and material quality characteristics Paliers lisses Techniques de contrle de la qualit et vrifications des caractristiques de qualit gomtriques et des matriaux BS ISO 12301:2007ii iiiContents Page Foreword iv 1
6、Scope 1 2 Normative references 1 3 Terms and definitions .2 4 Symbols and units.4 5 Summary of defined quality characteristics .5 6 Geometrical quality characteristics.7 6.1 Wall thickness, s3.7 6.2 Outside diameter, Do.13 6.3 Inside diameter, Di.14 6.4 Width, B.17 6.5 Locating features.18 6.6 Lubri
7、cant feed and distribution features.19 6.7 Surface conditions.20 6.8 Crush height, a (peripheral length).21 6.9 Free spread.22 6.10 Straightness of sliding surface 23 6.11 Joint face taper, h.24 6.12 Back contact.24 6.13 Joint displacement, B25 6.14 Height of thrust half-washer, H 25 6.15 Flatness 2
8、6 6.16 Flange diameter, Dfl.27 6.17 Distance between flanges, afl28 6.18 Flange thickness, sfl.29 6.19 Perpendicularity (squareness) of flange .30 6.20 Geometric deviations 31 7 Material quality characteristics 35 7.1 Metallic solid materials .35 7.2 Metallic multilayer material.36 7.3 Polymer layer
9、 material 38 7.4 Solid polymer material 39 7.5 Sintered material39 Annex A (informative) Calculation of tangential load40 Bibliography 47 BS ISO 12301:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies).
10、The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-g
11、overnmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2
12、. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a
13、vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 12301 was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee SC 5, Qu
14、ality analysis and assurance. This second edition cancels and replaces the first edition (ISO 12301:1992), which has been technically revised. (It also incorporates the Technical corrigendum ISO 12301:1992/Cor. 1:1995.) BS ISO 12301:20071Plain bearings Quality control techniques and inspection of ge
15、ometrical and material quality characteristics 1 Scope This International Standard specifies quality control techniques and inspection of the geometrical and material quality characteristics of the following types of plain bearings: thin-walled half-bearings with or without flange, as specified in I
16、SO 3548; metallic thick-walled half-bearings (with and without flange) that are manufactured as halves but that are necessarily interchangeable and have the ratio s3: Do 0,11; wrapped bushes, as specified in ISO 3547; unsplit metallic bushes (with and without flange) made from solid and multilayer m
17、aterials and with outside diameters up to 230 mm; solid polymer bushes (with and without flange) with inside diameters up to 200 mm; ring-type thrust washers and pressed bimetallic half-thrust washers, as specified in ISO 6525 and ISO 6526, respectively; bushes made from sintered material, as specif
18、ied in ISO 2795. 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 of the referenced document (including any amendments) applies. ISO 2795,
19、 Plain bearings Sintered bushes Dimensions and tolerances ISO 3274 Geometrical Product Specifications (GPS) Surface texture: Profile method Nominal characteristics of contact (stylus) instruments ISO 3547-1, Plain bearings Wrapped bushes Part 1: Dimensions ISO 3547-2, Plain bearings Wrapped bushes P
20、art 2: Test data for outside and inside diameters ISO 3547-3, Plain bearings Wrapped bushes Part 3: Lubrication holes, grooves and indentations ISO 3547-4, Plain bearings Wrapped bushes Part 4: Materials ISO 3547-5, Plain bearings Wrapped bushes Part 5: Checking the outside diameter ISO 3547-6, Plai
21、n bearings Wrapped bushes Part 6: Checking the inside diameter BS ISO 12301:20072 ISO 3547-7, Plain Bearings Wrapped bushes Part 7: Measurement of wall thickness of thin-walled bushes ISO 3548, Plain bearings Thin-walled half bearings with or without flange Tolerances, design features and methods of
22、 test ISO 4287, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms, definitions and surface texture parameters ISO 4288, Geometrical Product Specifications (GPS) Surface texture: Profile method Rules and procedures for the assessment of surface texture ISO 4378-1, Plain b
23、earings Terms, definitions and classification Part 1: Design, bearing materials and their properties ISO 4384-1, Plain bearings Hardness testing of bearing metals Part 1: Compound materials ISO 4384-2, Plain bearings Hardness testing of bearing metals Part 2: Solid materials ISO 4386-1, Plain bearin
24、gs Metallic multilayer plain bearings Part 1: Non-destructive ultrasonic testing of bond ISO 4386-2 Plain bearings Metallic multilayer plain bearings Part 2: Destructive testing of bond for bearing metal layer thicknesses W 2 mm ISO 4386-3, Plain bearings Metallic multilayer plain bearings Part 3: N
25、on-destructive penetrant testing ISO 6524:1992, Plain bearings Thin-walled half bearings Checking of peripheral length ISO 6525, Plain bearings Ring type thrust washers made from strip Dimensions and tolerances ISO 6526, Plain bearings Pressed bimetallic half thrust washers Features and tolerances I
26、SO 6691, Thermoplastic polymers for plain bearings Classification and designation 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 4378-1 and the following apply. 3.1 quality of plain bearing condition which renders a plain bearing fit to fulfil given
27、 requirements NOTE The given requirements are generally dependent upon the intended use. 3.2 quality control techniques method, equipment and procedure by means of which the quality of a plain bearing is assessed 3.3 quality characteristic characteristic by means of which the quality of a plain bear
28、ing is judged 3.4 inspection checking of one or more quality characteristics of a plain bearing with applicable requirements BS ISO 12301:200733.5 uncertainty of measurement parameter, associated with the result of a measurement, that characterizes the dispersion of the values that could reasonably
29、be attributed to the measurand Guide 99 NOTE The uncertainty, u, should be evaluated using statistical methods, e.g. repeatability and reproducibility studies, or as shown below: ut= where t is the stochastic variable according to Students t distribution; t = 2 and corresponds to a statistical proba
30、bility in measurement P = 95 %, for which the probability of exceeding the value (1 P) = 0,05 or 5 %; is the standard deviation of the whole lot. NOTE 1 The uncertainty of measurement is normally 10 % of the tolerance. 3.6 measuring points agreed points established to facilitate agreement on checkin
31、g NOTE The establishment of measuring points does not preclude the need to comply with dimensional specifications in other areas. 3.7 measuring lines agreed lines established to facilitate agreement on checking NOTE The establishment of measuring lines does not preclude the need to comply with dimen
32、sional specifications in other areas. 3.8 tolerance range between the upper specified limit and the lower specified limit BS ISO 12301:20074 4 Symbols and units For the purposes of this document, the symbols and units given in Table 1 apply. Table 1 Symbol Parameter SI unit a Crush height millimetre
33、s a Measured change in a millimetres achDistance to measuring position millimetres aEDistance between gauge faces millimetres aflDistance between flanges millimetres AeffEffective cross-section square millimetres B Width millimetreBJoint displacement millimetres dchDiameter of the checking block bor
34、e millimetres DHHousing diameter millimetres DflFlange diameter millimetres DfsDiameter measured across the joint in the free state; free spread diameter millimetres DiInside diameter millimetres DoOutside diameter millimetres Elastic reduction millimetres FchChecking load newtons FpinMeasuring pin
35、load newtons FtanTangential load of bearing as fitted newtons hchRadius for flange thickness measurement millimetres hJoint face taper millimetres H Height millimetreM Number of measuring lines s1Thickness of the backing layer millimetres s2Thickness of the bearing material layer millimetres s2, red
36、Thickness of the bearing material layer, reduced millimetres sflFlange thickness millimetres s3Wall thickness millimetres T Tolerance millimetret Stochastic variable u Uncertainty of measurement millimetres x1, x2, ., xiIndividual measured values millimetres y Flatness gauge gap millimetres maxMaxim
37、um diametral deformation in compression millimetres minMinimum diametral deformation in compression millimetres Standard deviation tanTangential strength newtons per square millimetre Stress newtons per square millimetre BS ISO 12301:200755 Summary of defined quality characteristics A summary of def
38、ined quality characteristics is given in Table 2 for the convenience of users of this International Standard, as guidance indicating which defined quality characteristics are relevant to each type of bearing. The sequence of the characteristics listed in Table 2 does not determine their importance.
39、The manufacturer and user shall agree on priorities for the quality characteristics that, from their points of view, are required to assure reliability and lifetime of the product. Table 2 Type of plain bearing Relevant clause/ subclause number Quality characteristics Thin- walled half- bearing Thic
40、k- walled half- bearing Wrappedbush Unsplitmetallicbush Solid polymer bush Sinteredbush Thrustwasher(ring and half)6 Geometrical quality characteristics a6.1 Wall thickness, s36.1.1 Line measurement + + + + + 6.1.2 Point measurement + + + + + + + 6.2 Outside diameter, Do + + + + + + 6.3 Inside diame
41、ter, Di + + + + + + 6.4 Width, B + + + + + + 6.5 Locating features + + + + + + 6.6 Lubricant feed and distribution features + + + + + + 6.7 Surface conditions + + + + + + 6.8 Crush height, a + 6.9 Free spread + + 6.10 Straightness of sliding surface + 6.11 Joint face taper, h+ 6.12 Back contact + 6.
42、13 Joint displacement, B + 6.14 Height of thrust half-washer, H (+) + 6.15 Flatness (+) + 6.16 Flange diameter, Dfl+ + + + + + 6.17 Distance between flanges, afl+ + + + + 6.18 Flange thickness, sfl+ + + + + + 6.19 Perpendicularity (squareness) of flange + + + + + (+) 6.20 Geometric deviations 6.20.1
43、 Cylindricity (+) + (+) 6.20.2 Run-out of thrust face (+) + + (+) 6.20.3 Coaxiality and concentricity + + + + BS ISO 12301:20076 Table 2 (continued) Type of plain bearing Relevant clause/ subclause number Quality characteristics Thin- walled half- bearing Thick- walled half- bearing Wrappedbush Unsp
44、litmetallicbush Solid polymer bush Sintered bush Thrustwasher(ring and half)7 Material quality characteristicsa7.1 Metallic solid material 7.1.1 Hardness + + + + 7.1.2 Material composition + + + + 7.1.3 Material structure + + + + 7.2 Metallic multilayer material 7.2.1 Overlay properties + + + + 7.2.
45、2 Lining properties + + + + 7.2.3 Backing properties + + + + 7.2.4 Adhesion (bond) of adjacent layers + + + + 7.3 Polymer layer material 7.3.1 Overlay properties + (+) 7.3.2 Lining properties + (+) 7.3.3 Backing properties + (+) 7.3.4 Adhesion (bond) of adjacent layers + (+) 7.4 Solid polymer materi
46、al 7.4.1 Material composition + 7.4.2 Material structure + 7.5 Sintered material 7.5.1 Material composition + 7.5.2 Material structure + aSignificance of symbols: Plus sign indicates that the characteristic is generally applicable to the corresponding type of bearing. Plus sign in parentheses indica
47、tes that this characteristic is not always applicable. Minus sign indicates that the characteristic is not relevant for the corresponding type of bearing. BS ISO 12301:200776 Geometrical quality characteristics In order to assess plain bearing quality, important dimensional quality characteristics a
48、re specified in Clause 6. Unless otherwise stated, the dimensions in the tables and figures are given in millimetres. 6.1 Wall thickness, s3See Table 3. Table 3 Dimensions in millimetres, unless otherwise stated Applicability Definition of measured geometrical characteristic Test method/measuring principle Test equipment See Figure 1. NOTE This test method is also applicable when measuring joint face bore relief. Metallic thin-walled half-bearing Figure 1 Figure 2 Metallic thick-w
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