1、BRITISH STANDARDBS ISO 4156-3:2005Straight cylindrical involute splines Metric module, side fit Part 3: InspectionICS 21.120g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g5
2、3g44g42g43g55g3g47g36g58BS ISO 4156-3:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 23 January 2006 BSI 23 January 2006ISBN 0 580 47454 2National forewordThis British Standard reproduces verbatim ISO 4156-3:2005 and implements it as the
3、 UK national standard.The UK participation in its preparation was entrusted to Technical Committee MCE/2, Shafts for machinery and accessories, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe Briti
4、sh Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publ
5、ication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible internatio
6、nal/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the ISO title page,
7、 pages ii to v, a blank page, pages 1 to 44, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsReference numberISO 4156-3:2005(E)INTERNATIONAL STANDARD ISO4156
8、-3First edition2005-10-01Straight cylindrical involute splines Metric module, side fit Part 3: Inspection Cannelures cylindriques droites flancs en dveloppante Module mtrique, centrage sur flancs Partie 3: Vrification BS ISO 4156-3:2005ii iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Norma
9、tive references 1 3 Terms and definitions .2 4 Symbols and abbreviated terms 2 5 Reference conditions 3 6 Quality features4 6.1 General4 6.2 Size4 6.3 Location 4 6.4 Form 5 7 Methods of inspection.5 7.1 Size5 7.2 Location 7 7.3 Form 9 8 Measurements with balls or pins .9 8.1 General9 8.2 Selection o
10、f balls or pins 10 8.3 Use and marking of pins .10 8.4 Statistical actual tolerance limit STA.10 8.5 Calculation of ball or pin diameter (DReor DRi).13 8.6 Calculation of dimensions for ball or pin inspection (part and gauge inspection) 15 9 Measurement over k teeth External splines (W ) 19 9.1 Calc
11、ulation of W .19 9.2 Choice of k 20 10 Gauges21 10.1 Generalities 21 10.2 Length of measuring part of gauges .22 10.3 Manufacturing tolerances for spline gauges (see Tables 8, 9 and 10)24 10.4 Values of deviation allowances of spline gauges 27 10.5 Inspection of gauges.27 10.6 Dimensions, designatio
12、n and marking of gauges29 11 Measurement of spline deviations.40 11.1 General40 11.2 Total profile deviation F40 11.3 Total cumulative pitch deviation Fp.40 11.4 Total helix deviation F.40 Annex A (informative) Influences of eccentricity and pitch deviation as explained in ISO 4156:1981.41 BS ISO 41
13、56-3:2005iv 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. Each member body interested in a subject f
14、or 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 International Electrotechnical Commission (IEC) on
15、 all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees a
16、re 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 the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held
17、responsible for identifying any or all such patent rights. ISO 4156-3 was prepared by Technical Committee ISO/TC 14, Shafts for machinery and accessories. This first edition of ISO 4156-3, together with ISO 4156-1 and ISO 4156-2, cancels and replaces ISO 4156:1981 and ISO 4156:1981/Amd 1:1992, of wh
18、ich it constitutes a technical revision. ISO 4156 consists of the following parts, under the general title Straight cylindrical involute splines Metric module, side fit: Part 1: Generalities Part 2: Dimensions Part 3: Inspection BS ISO 4156-3:2005vIntroduction ISO 4156 provides the data and indicati
19、ons necessary for the design, manufacture and inspection of straight (non-helical) side-fitting cylindrical involute splines. Straight cylindrical involute splines manufactured in accordance with ISO 4156 are used for clearance, sliding and interference connections of shafts and hubs. They contain a
20、ll the necessary characteristics for the assembly, transmission of torque, and economic production. The nominal pressure angles are 30, 37,5 and 45. For electronic data processing purposes, the form of expression 37,5 has been adopted instead of 3730. ISO 4156 establishes a specification based on th
21、e following modules: for pressure angles of 30 and 37,5 the module increments are 0,5; 0,75; 1; 1,25; 1,5; 1,75; 2; 2,5; 3; 4; 5; 6; 8; 10 for pressure angle of 45 the module increments are 0,25; 0,5; 0,75; 1; 1,25; 1,5; 1,75; 2; 2,5 BS ISO 4156-3:2005blank1Straight cylindrical involute splines Metr
22、ic module, side fit Part 3: Inspection 1 Scope This part of ISO 4156 provides data and guidance for the inspection of straight (non-helical) side fitting cylindrical involute splines. Limiting dimensions, tolerances, manufacturing errors and their effects on the fit between connecting coaxial spline
23、 elements are defined and tabulated. Linear dimensions are expressed in millimetres and angular dimensions in degrees. 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 r
24、eferences, the latest edition of the referenced document (including any amendments) applies. ISO 3, Preferred numbers Series of preferred numbers ISO 286-1, ISO system of limits and fits Part 1: Bases of tolerances, deviations and fits ISO 1101, Geometrical Product Specifications (GPS) Geometrical t
25、olerancing Tolerances of form, orientation, location and run-out ISO 1328-1, Cylindrical gears ISO system of accuracy Part 1: Definitions and allowable values of deviations relevant to corresponding flanks of gear teeth ISO 1328-2, Cylindrical gears ISO system of accuracy Part 2: Definitions and all
26、owable values of deviations relevant to radial composite deviations and runout information ISO/R 1938-1, ISO system of limits and fits Part 1: Inspection of plain workpieces ISO 4156-1, Straight cylindrical involute splines Metric module, side fit Part 1: Generalities ISO 4156-2, Straight cylindrica
27、l involute splines Metric module, side fit Part 2: Dimensions ISO 5459, Technical drawings Geometrical tolerancing Datums and datum-systems for geometrical tolerances BS ISO 4156-3:20052 3 Terms and definitions For the purpose of this document, the terms and definitions given in ISO 4156-1 apply. 4
28、Symbols and abbreviated terms NOTE Some of the symbols used might have a meaning other than the one intended here. The symbols H, Z, Y and W are common for gauge tolerances in other ISO standards and could seem to conflict with symbols used in this part of ISO 4156. However, it was not thought neces
29、sary to distinguish between them, since the context will always preclude any ambiguity. D Pitch diameter mm DFe maxMaximum form diameter, external spline mm DFi minMinimum form diameter, internal spline mm DReDiameter of measuring ball or pin for external spline mm DRiDiameter of measuring ball or p
30、in for internal spline mm DbBase diameter mm DeeMajor diameter, external spline mm Dee maxMaximum major diameter, external spline mm Dee minMinimum major diameter, external spline mm DiiMinor diameter, internal spline mm Dii minMinimum minor diameter, internal spline mm E Basic space width mm EmaxMa
31、ximum actual space width mm EminMinimum actual space width mm ErEccentric radial offset mm EvEffective space width mm Ev maxMaximum effective space width mm Ev minMinimum effective space width mm FpTotal cumulative pitch deviation m FTotal profile deviation m FTotal helix deviation m KeApproximation
32、 factor for external spline KiApproximation factor for internal spline MReMeasurement over two balls or pins, external splines mm MRiMeasurement between two balls or pins, internal mm S Basic tooth thickness mm SmaxMaximum actual tooth thickness mm SminMinimum actual tooth thickness mm SbCircular ba
33、se thickness mm BS ISO 4156-3:20053Sv maxMaximum effective tooth thickness mm Sv minMinimum effective tooth thickness mm STA Statistical tolerance limit actual m, % STAabsoluteStatistical tolerance limit actual absolute m, % STArelativeStatistical tolerance limit actual relative % T Machining tolera
34、nce m TvEffective clearance tolerance m W Measurement over k teeth, external spline mm aallowedLimited max. value of distance out of the actual tolerance limit m dceBall or pin contact diameter, external spline mm dciBall or pin contact diameter, internal spline mm i Integer inv Involute (=tan /180
35、) k Number of measured teeth m Module mmnallowedMax. allowed number of measured sizes outside tolerance limit pbBase pitch mm z Number of teeth Pressure angle cePressure angle at ball or pin diameter, external spline DStandard pressure angle at pitch diameter ePressure angle at ball or pin centre, e
36、xternal spline iPressure angle at ball or pin centre, internal spline Phase angle Angular pitch Deviation allowance m 5 Reference conditions The standard reference temperature for industrial length measurements is 20 C. The dimensional requirements for parts and gauges are defined at that temperatur
37、e and inspection shall also normally be carried out at that same temperature. If measurements are taken at another temperature, the results shall be corrected using the expansion coefficients of parts and gauges respectively. Unless otherwise specified, all measurements shall be made under zero meas
38、uring load. If measurements are made under a non-zero load, the results shall be corrected accordingly. However, such correction is not required for comparison measurements made with the same comparison means and under the same measuring load, between similar components of the same material and with
39、 the same surface condition. BS ISO 4156-3:20054 6 Quality features 6.1 General The inspection of splines is divided into three quality features, as shown in Figure 1. Figure 1 Quality features 6.2 Size 6.2.1 Actual size The actual size is a) for external splines, the circular tooth thickness at the
40、 pitch diameter, and b) for internal splines, the circular space width at the pitch diameter. 6.2.2 Effective size The effective tooth thickness or space width is the maximum material condition resulting from the actual size and the accumulation of form deviations. 6.3 Location The location of a spl
41、ine is the location of the central axis in relation to any other geometrical element found by actual or effective inspection methods. BS ISO 4156-3:200556.4 Form The form deviations of a spline are the deviations to the true geometrical form of profile, helix and pitch. 7 Methods of inspection 7.1 S
42、ize 7.1.1 General methods Three general methods of inspection are provided in Table 1. If not otherwise specified, the standard method shall be used. If the alternative methods A or B are required, this shall be stated in the part data table. For the consequence of general methods, see Table 2. Tabl
43、e 1 Relationship between parameters and control method Minimum material Minimum effective clearance Maximum effective clearance Parameter Smin/EmaxSv max/Ev minSv min/Ev maxStandard method X X Method A X Method B X Table 2 Consequence of general methods Inspection method Theoretical maximum clearanc
44、e between mating parts (zero form deviation) Maximum deviation of form in each part (zero clearance) Standard 2 (T + ) T + Alternative A 2TvT + Alternative B 2TvUndetermined NOTE The theoretical maximum clearance between mating parts in this table is for parts in their new condition. The clearance w
45、ill increase when wear occurs. 7.1.2 Choice of measuring instrument The choice of measuring instrument shall be made according to the design requirements (see ISO 4156 part 1). See Table 3 and Figure 2. 7.1.3 Actual size 7.1.3.1 Dimensions over and between balls The dimension over or between balls f
46、acilitates the calculation of the theoretical actual circular tooth thickness or space width at the pitch circle diameter based on the actual tooth thickness or space width where the balls contact through one normal plane. The size measured over or between balls is a true size at 2 particular gaps a
47、nd in one particular plane. 7.1.3.2 Dimensions over and between pins The dimension over or between pins facilitates the calculation of the theoretical actual circular tooth thickness or space width at the pitch circle diameter based on the actual tooth thickness or space width where the pins have a
48、line contact. BS ISO 4156-3:20056 Table 3 Size Inspection measuring instruments, methods and priorities Parameter Smin/EmaxSv max/Ev minSv min/Ev maxSmax/EminPriority Method Highest Measurement over and between balls GO composite gauge NO GO composite gauge Measurement over and between balls Lower M
49、easurement over and between pins NO GO sector gauge Variable sector gauge Span size Variable composite gauge Analysis calculations using size and form deviations Variable composite gauge Measurement over and between pins Variable sector gauge Internal space width External tooth thickness aPitch circle. bNO GO sector plug gauge or max. measurement between balls or pins. cNO GO composite plug gauge. dMin. measurement between balls or pins, aux
