1、BRITISH STANDARDBS ISO 3547-7:2007Plain bearings Wrapped bushes Part 7: Measurement of wall thickness of thin-walled bushes ICS 21.100.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g
2、38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 3547-7:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2007 BSI 2007ISBN 978 0 580 56494 9National forewordThis British Standard is the UK implementation of ISO 3547-7:2007. It super
3、sedes BS 7772:1994 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee MCE/12, Plain bearings.A list of organizations represented on this committee can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 the necessary p
4、rovisions 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 3547-7:2007(E)INTERNATIONAL STANDARD ISO3547-7First edition2007-10-
5、01Plain bearings Wrapped bushes Part 7: Measurement of wall thickness of thin-walled bushes Paliers lisses Bagues roules Partie 7: Mesurage de lpaisseur de paroi des bagues minces BS ISO 3547-7:2007ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Sy
6、mbols and units 2 5 Purpose of checking. 2 6 Checking methods 2 7 Requirements for measuring equipment for the contact method . 5 8 Checking of measuring equipment. 5 Bibliography . 6 BS ISO 3547-7:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of
7、national standards bodies (ISO member bodies). 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. Inte
8、rnational organizations, governmental and non-governmental, 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 th
9、e rules given in the ISO/IEC Directives, Part 2. 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 vote. Attention is drawn to th
10、e possibility that some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 3547-7 was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee
11、SC 5, Quality analysis and assurance. This part of ISO 3547 cancels and replaces ISO 12306:1994, which has been technically revised. ISO 3547 consists of the following parts, under the general title Plain bearings Wrapped bushes: Part 1: Dimensions Part 2: Test data for outside and inside diameters
12、Part 3: Lubrication holes, grooves and indentations Part 4: Materials Part 5: Checking the outside diameter Part 6: Checking the inside diameter Part 7: Measurement of wall thickness of thin-walled bushes BS ISO 3547-7:20071Plain bearings Wrapped bushes Part 7: Measurement of wall thickness of thin-
13、walled bushes 1 Scope This part of ISO 3547 describes, following ISO 12301, the checking methods and measuring equipment used for measuring the total wall thickness of thin-walled bushes in the finished state. NOTE All dimensions in this International Standard are given in millimetres. 2 Normative r
14、eferences 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 3547-1, Plain bearings Wrapped bush
15、es Part 1: Dimensions ISO 4379, Plain bearings Copper alloy bushes 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 wall thickness s3radial distance between the opposing measuring points at the inside and the outside surface diameter See Figur
16、e 1. BS ISO 3547-7:20072 a) Clinched bush b) Split bush Key 1 clinch Figure 1 Wall thickness, s34 Symbols and units For the purposes of this document, the symbols and units given in Table 1 apply. Table 1 Symbols and units Symbol Parameter SI unit achDistance to measuring position millimetre B Width
17、 of the bush millimetre DoOutside diameter of the bush millimetre FpinMeasuring pin load newton s3Wall thickness millimetre 5 Purpose of checking The purpose of checking is to ensure that the wall thickness and wall thickness tolerances are in accordance with ISO 3547-1 and ISO 4379. If this measure
18、ment is required, it is designated S; see ISO 3547-1. 6 Checking methods 6.1 Measuring principle The gauging axis of the measuring device shall be in the radial direction and at a right angle to the outside surface of the test piece in order to find the minimum value of the wall thickness. The measu
19、red values may be recorded by a single measurement or by a sum measurement, as represented symbolically in Figure 2. BS ISO 3547-7:20073a) Single measurement by contact (mechanical/electronic gauge) b) Sum measurement by contact/non-contact(electronic/pneumatic gauge) Figure 2 Measuring principle of
20、 wall thickness measurement The presence of lubricating holes, oil pockets, oil grooves, markings or special chamfers can require deviation from the measuring lines and measuring points specified in 6.2 and 6.3. Any such deviation shall be agreed upon separately. Any wall thickness not conforming to
21、 the specified values due to the manufacturing process, because of deformation of the bearing backing in the area of marking or at non-load-bearings places of wrapped bushes, shall be defined separately. 6.2 Line measurement around the circumference Continuous measurement of the wall thickness aroun
22、d the circumference shall be carried out at the measuring lines specified in Figure 3 and Table 2. a) B u 15 b) B 15 Key 1 measuring lines, M 2 chamfer Figure 3 Position of measuring lines BS ISO 3547-7:20074 Table 2 Distance to measuring position, achDimensions in millimetres Distance to measuring
23、positionaB achNumber of measuring lines, M u 15 B/2 1 15 u 50 4 2 50 6 2 aEach measuring line distance, ach, is specified from the beginning of the sliding surface or from the end face by adding the nominal value of the chamfer. 6.3 Point measurement Point-by-point measurement of wall thickness shal
24、l be carried out at the measuring points specified in Figure 4 for widths of B u 90 mm and outside diameter Dou 150 mm. In the case where B 90 mm and Do 150 mm, the measurement method shall be subject to agreement between the supplier and user. The measuring position distance, ach, shall be taken fr
25、om Table 2. Dimensions in millimetres Key 1 split position P measuring points Figure 4 Three- or six-point measuring scheme BS ISO 3547-7:200757 Requirements for measuring equipment for the contact method 7.1 Radius of the measuring pin on the outside surface The radius of the measuring pin position
26、ed on the outside shall be 1,5 mm 0,2 mm as shown in Figure 5. Figure 5 Measuring equipment for the contact method 7.2 Radius of the measuring pin on the inside surface The radius of the measuring pin positioned on the inside is given in Table 3 as a function of the bush outside diameter Doand the b
27、earing material. Table 3 Radius of the measuring pin on the inside surface Dimensions in millimetres DoRadius of the measuring pin nominal Metallic bushes Polymer bushes u 10 1,5 0,2 1,5 0,2 10 u 25 3 0,2 3 0,2 25 u 150 3 0,2 5 0,2 150 5 0,2 5 0,2 7.3 Measuring pin load The measuring pin load, Fpin,
28、 applied onto the sliding layer, shall be 0,8 N to 2,5 N in accordance with ISO 12301. 8 Checking of measuring equipment The measuring equipment shall be checked for uncertainty of measurement at a frequency specified by the user, based on the type of equipment and on experience from previous checks
29、. The limits shall comply with the current industry requirements. BS ISO 3547-7:20076 Bibliography 1 ISO 3547-2, Plain bearings Wrapped bushes Part 2: Test data for outside and inside diameters 2 ISO 12301, Plain bearings Quality control techniques and inspection of geometrical and material quality
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