1、BRITISH STANDARDBS ISO 3547-5:2007Plain bearings Wrapped bushes Part 5: Checking the outside diameterICS 21.100.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43
2、g55g3g47g36g58BS ISO 3547-5:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2007 BSI 2007ISBN 978 0 580 56483 3National forewordThis British Standard is the UK implementation of ISO 3547-5:2007. It supersedes BS 4480-9:1995 wh
3、ich is withdrawn.The UK participation in its preparation was entrusted to Technical Committee MCE/12, Plain bearings.A list of organizations represented on this committee can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 provisions of a contra
4、ct. 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 3547-5:2007(E)INTERNATIONAL STANDARD ISO3547-5First edition2007-10-01Plain bearings Wra
5、pped bushes Part 5: Checking the outside diameter Paliers lisses Bagues roules Partie 5: Contrle du diamtre extrieur BS ISO 3547-5:2007ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Symbols and units 2 4 Outside diameter, Do2 5 Purpose of checking. 3 6 Methods of checking 3
6、 7 Selection of checking method for outside diameter . 3 8 ISO 3547-2, test A Outside diameter, Do3 9 ISO 3547-2:2006, test B Outside diameter, Do. 11 10 ISO 3547-2:2006, test D Outside diameter, Do 120 mm 13 11 Specifications on drawings of bushes . 14 12 Specifications for control of the checking
7、equipment 14 Bibliography . 15 BS ISO 3547-5:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Ea
8、ch 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-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the Internatio
9、nal Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted according to the rules given in the ISO/IEC Directives, Part 2. Draft International Standards adopted by the technical committees are circulated to the member bodies for voti
10、ng. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a 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
11、 patent rights. International Standard ISO 3547-5 was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee SC 5, Quality analysis and assurance. This part of ISO 3547 cancels and replaces ISO 12307-1:1994, which has been technically revised. ISO 3547 consists of the following par
12、ts, under the general title Plain bearings Wrapped bushes: Part 1: Dimensions Part 2: Test data for outside and inside diameters 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 wal
13、l thickness of thin-walled bushes BS ISO 3547-5:20071Plain bearings Wrapped bushes Part 5: Checking the outside diameter 1 Scope This part of ISO 3547 specifies, following ISO 12301, the checking of the outside diameter of wrapped bushes (ISO 3547-2:2006, methods A, B and D) and describes the necess
14、ary checking methods and measuring equipment. Wrapped bushes in the free condition are flexible, but after insertion they adapt largely to the shape of the housing bore due to the oversize between the outside diameter of the bush and the housing bore. For this reason, checking of the outside diamete
15、r of wrapped bushes can only be carried out under a constraining load by use of specialized measuring equipment. NOTE 1 The dimensions and tolerances of wrapped bushes are given in ISO 3547-1. Checking the wall thickness is the subject of ISO 3547-7. 2 Normative references The following referenced d
16、ocuments 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 286-2:1988, ISO system of limits and fits Part 2: Tables of standard to
17、lerance grades and limit deviations for holes and shafts ISO/R 1938-1:1971, ISO system of limits and fits Part 1: Inspection of plain workpieces ISO 3547-2:2006, Plain bearings Wrapped bushes Part 2: Test data for outside and inside diameters BS ISO 3547-5:20072 3 Symbols and units Table 1 Symbols a
18、nd units Symbol Parameter SI unit B Width of the bush millimetres bch, 1Width of the checking block millimetres bch, 2Width of the setting plug millimetres doOutside diameter of the ring gauge millimetres DoOutside diameter of the bush millimetres dch, 1Diameter of the checking block bore (see ISO 3
19、547-2) millimetres dch, 2Diameter of the setting plug (see ISO 3547-2) millimetres dch, a, 1Actual diameter of the checking block millimetres dch, a, 2Actual diameter of the setting plug millimetres FchChecking load newtons C Correction factor millimetres n Number of test pieces RaSurface roughness
20、micrometres t1. t6Tolerances of form and position millimetres x Length of checking block millimetres y Width of checking block millimetres z Distance between checking block halves millimetres DoTolerance of Domillimetrez Indicator reading millimetres zDCircumference indicator reading millimetres 4 O
21、utside diameter, DoFor the outside diameter of a wrapped bush, see Figure 1. Key 1 split line NOTE The free diameter of a wrapped bush is not measured directly because of the flexible nature of the component. Figure 1 Outside diameter of a wrapped bush BS ISO 3547-5:200735 Purpose of checking The ou
22、tside diameter shall be checked to ensure the designated mounting compression (interference fit) for the wrapped bush in the housing bore. 6 Methods of checking NOTE Checking method C is for measuring the inside diameter and is covered by ISO 3547-6. 6.1 Checking method A Measurement of outside diam
23、eter, DoNOTE See ISO 3547-2. Check the outside diameter of a wrapped bush using measuring equipment as shown in Figure 2, with a checking block consisting of upper and lower halves (see Figures 3 and 4) and setting plugs (see Figures 5 and 6), at a determined checking load, Fch. Measure the outside
24、diameter indirectly as the difference in the value of z, z. The checking load is calculated so that the bush outside diameter is reduced only elastically during checking and that there is no permanent deformation. 6.2 Checking method B Gauging of outside diameter, DoNOTE See ISO 3547-2. Check the ou
25、tside diameter of a wrapped bush in “GO” and “NO GO” ring gauges. 6.3 Checking method D Measurement of outside diameter, Do 120 mm NOTE See ISO 3547-2. Check the outside diameter of a wrapped bush above 120 mm diameter using a precision measuring tape. 7 Selection of checking method for outside diam
26、eter Method A is a precise method involving complex tooling. Method B is an attributive method using simpler tooling. Method D is used only for wrapped bushes with an outside diameter 120 mm. All three methods are in general use. Method A is generally unsuitable for small bushes up to 10 mm outside
27、diameter but is preferred for bushes over 10 mm outside diameter. 8 ISO 3547-2, test A Outside diameter, Do8.1 Measuring equipment See Tables 2 and 3. Typical equipment for measuring the bush consists essentially of the following components: base plate used as fixture and guiding device for the spli
28、t checking block; means to generate the checking load; means to calibrate the load; BS ISO 3547-5:20074 upper plate; system for transmitting the distance, z, of both checking block halves to the measuring pin (see Figure 2); measuring pin with indicating instrument; checking block (see Figures 3 and
29、 4) with setting plug (see Figures 5 and 6). Key 1 split line 2 bush 3 checking block 4 measuring pins 5 indicating instrument Figure 2 Typical outside diameter measuring system Figure 2 shows a typical outside diameter measuring system. This may be operated hydraulically, pneumatically or mechanica
30、lly. The force, Fch, may be smoothly applied from the top or from below. The bush split shall be in the vertical direction and pointing towards the upper checking block. BS ISO 3547-5:20075Table 2 Checking loads, limiting deviations, speed of approach and temperature Checking load FchPermissible lim
31、iting deviations Maximum speed of approach to apply the checking load, FchTest temperatureaN % mm/s C u 2 000 1,25 2 000 u 5 000 1 5 000 u 10 000 0,75 10 000 u 50 000 0,5 12 20 to 25 aThe difference in temperature between the checking block and the bush to be measured shall not exceed 1 C. Table 3 D
32、eviations for dial gauge and electronic gauge Dimensions in millimetres Outside diameter Resolution Total deviationaTolerance Dodial gauge electronic gauge dial gauge electronic gauge u 0,1 0,001 0,001 0,001 2 0,1 0,005 0,005 0,006 0,5 % of measuring range aMaximum measuring value indication (for a
33、full-scale range of 500 m). 8.2 Requirements for checking the block and the setting plug The requirements for the checking block and the setting plug for measuring the bush outside diameter, Do, shall be as shown in Figures 3 to 6 and as given in Table 4. Manufacturing tolerances and wear limits are
34、 given in Table 5. Table 4 Maximum difference between the diameters of the checking block, dch, 1, and setting plug, dch, 2, for a usable combination Dimensions in millimetres Dodch, 1 dch, 2nominal max.u 18 0,006 18 u 50 0,008 50 u 80 0,01 80 u 120 0,012 120 u 180 0,016 BS ISO 3547-5:20076 Dimensio
35、ns in millimetres x W 160 mm x W dch, 1+ 90 mmy W 70 mm y W bch, 1+ 5 mm Key 1 field for marking bch, 1W B + 2 Figure 3 Upper half of checking block BS ISO 3547-5:20077Dimensions in millimetres, unless otherwise indicated x W 160 mm x W dch, 1+ 90 mmy W 70 mm y W bch, 1+ 5 mm Key 1 field for marking
36、 bch, 1W B + 2 Figure 4 Lower half of checking block BS ISO 3547-5:20078 Key 1 field for marking bch, 2W bch, 1+ 5 Figure 5 Setting plug, solid, for dch, 2u 80 mm Dimensions in millimetres Key 1 field for marking bch, 2W bch, 1+ 5 Figure 6 Setting plug, for example with blind hole, for dch, 2 80 mm
37、BS ISO 3547-5:20079Table 5 Manufacturing tolerances and wear limits for checking block, setting plug and ring gauge Dimensions in millimetres Donominal Limits of manufacturing tolerances or wear limits dch, 2dch, 1t1t2t3t4t5t6manufacture 00,0030,0030+0,002 0,002 0,003 0,05 0,002 0,03 u 80 wear 0,005
38、 +0,005 0,004 0,004 0,005 0,05 0,004 0,05 manufacture 00,0050,0050+0,003 0,003 0,004 0,05 0,003 0,03 80 u 150awear 0,007 +0,007 0,005 0,005 0,006 0,05 0,005 0,05 aFor Do 150 mm agreement shall be reached between the supplier and user. Checking block halves (see Figures 3 and 4) and setting plugs (se
39、e Figures 5 and 6) shall be made from hardened (60 HRC to 64 HRC) and non-ageing steel. The checking block halves shall be of rigid construction so that only negligible deformations are caused by the forces arising during measurement of the bushes. The bore of the checking block halves and the check
40、ing surface of the setting plug shall not be chromium plated. The checking block diameter, dch, 1, and the setting plug diameter, dch, 2,may be marked with their nominal value. 8.3 Determination of correction factor, C The correction factor, C, is used to correct the setup of the indicating instrume
41、nt and is calculated from Equation (1): ()( )ch,a,1 ch,1 ch,a,1 ch,a,22Cd d d d=(1) EXAMPLE dch,1= 20,050 mm dch, a, 1= 20,052 mm dch, a, 2= 20,048 mm Therefore, ()()20,052 20,050 20,052 20,0482C= C = 0,001 mm If the actual diameter, dch, a, 1, of the checking block deviates from the checking block
42、diameter, dch, 1, of the bushes to be checked, these checking blocks may still be used provided that the deviation ch,a ch,1 1dd u 0,03 mm. The tolerances of the setting plug according to Table 5 are not affected. BS ISO 3547-5:200710 EXAMPLE dch,1= 20,062 mm dch, a, 1= 20,052 mm dch, a, 2= 20,048 m
43、m ch,a ch,1 10,010 mm 0,030 mmdd= = 120 mm 10.1 Gauging equipment The test is carried out by means of a precision measuring tape. 10.2 Measuring equipment a) Calibration with setting plug b) Checking of the bush Key 1 precision measuring tape 2 dial gauge 3 tensioning handle 4 setting plug 5 bush Fi
44、gure 8 Measuring equipment 10.3 Procedure The measuring tape is calibrated around a plug with a diameter equal to the nominal outside diameter, Do, of the bush. An indicating device is attached to the “free” end of the measuring tape and set to the calibration size. After the bush has been checked,
45、the circumference indicator reading, zD, is the difference between the calibrated value of the setting plug and the measured value of the bush. From this, the outside diameter of the bush, Do, can be calculated as given in Equation (2): och,D2zDd=+(2) 10.4 Measuring errors The most frequent measurin
46、g errors are as follows. a) The tension is not sufficient to close the split line. b) The measuring tape is not wrapped around the centre line of the bush. c) Grease, dirt, burrs, etc. are present on the outside diameter (back surface) and/or in the split, or the outside diameter and/or the split is
47、 damaged or deformed. BS ISO 3547-5:200714 11 Specifications on drawings of bushes The preferred option for the checking method shall be as specified as in ISO 3547-2. 12 Specifications for control of the checking equipment 12.1 Gauging equipment The gauging equipment shall be checked regularly; sig
48、nificant damage shall be made good and any dimensional changes shall be recorded. 12.2 Measuring equipment The measuring equipment shall be checked for accuracy, at time intervals that should be specified in accordance with statistical methods. BS ISO 3547-5:200715Bibliography 1 ISO 286-1, ISO syste
49、m of limits and fits Part 1: Bases of tolerances, deviations and fits 2 ISO 3547-1, Plain bearings Wrapped bushes Part 1: Dimensions 3 ISO 3547-6, Plain bearings Wrapped bushes Part 6: Checking the inside diameter 4 ISO 3547-7, Plain bearings Wrapped bushes Part 7: Measurement of wall thickness of thin-walled bushes 5 ISO 12301, Plain bearings Quality control techniques and inspection of geometrical and material quality ch
