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1、 Reference number ISO 4156-3:2005(E) ISO 2005 INTERNATIONAL STANDARD ISO 4156-3 First edition 2005-10-01 Straight cylindrical involute splines Metric module, side fit Part 3: Inspection Cannelures cylindriques droites flancs en dveloppante Module mtrique, centrage sur flancs Partie 3: Vrification -,
2、-,- ISO 4156-3:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
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5、ess given below. ISO 2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs
6、 member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reserved ISO 4156-3:2005(E) ISO 2005 All rights reserved iii Conte
7、nts Page Foreword iv Introduction v 1 Scope 1 2 Normative references1 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 Location4 6.4 Form5 7 Methods of inspection.5 7.1 Size5 7.2 Location7 7.3 Form9 8 Measurements wi
8、th balls or pins.9 8.1 General9 8.2 Selection of 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 (DRe or DRi).13 8.6 Calculation of dimensions for ball or pin inspection (part and gauge inspection)15 9 Measurement
9、over k teeth External splines (W)19 9.1 Calculation of W.19 9.2 Choice of k20 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 gauges27 10.5 Inspection
10、 of gauges.27 10.6 Dimensions, designation 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 a
11、s explained in ISO 4156:1981.41 -,-,- ISO 4156-3:2005(E) iv ISO 2005 All rights reserved 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
12、 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-governmental, in liaison with ISO, also take part in the work. ISO col
13、laborates 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. The main task of technical committees is to prepare International S
14、tandards. 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 the possibility that some of the elements
15、 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 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 4
16、156-2, cancels and replaces ISO 4156:1981 and ISO 4156:1981/Amd 1:1992, of which 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: Inspe
17、ction ISO 4156-3:2005(E) ISO 2005 All rights reserved v Introduction ISO 4156 provides the data and indications necessary for the design, manufacture and inspection of straight (non-helical) side-fitting cylindrical involute splines. Straight cylindrical involute splines manufactured in accordance w
18、ith ISO 4156 are used for clearance, sliding and interference connections of shafts and hubs. They contain all 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, th
19、e form of expression 37,5 has been adopted instead of 3730. ISO 4156 establishes a specification based on the 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,
20、25; 0,5; 0,75; 1; 1,25; 1,5; 1,75; 2; 2,5 -,-,- -,-,- INTERNATIONAL STANDARD ISO 4156-3:2005(E) ISO 2005 All rights reserved 1 Straight cylindrical involute splines Metric module, side fit Part 3: Inspection 1 Scope This part of ISO 4156 provides data and guidance for the inspection of straight (non
21、-helical) side fitting cylindrical involute splines. Limiting dimensions, tolerances, manufacturing errors and their effects on the fit between connecting coaxial spline elements are defined and tabulated. Linear dimensions are expressed in millimetres and angular dimensions in degrees. 2 Normative
22、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 3, Preferred numbers Series of pre
23、ferred 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 tolerancing Tolerances of form, orientation, location and run-out ISO 1328-1, Cylindrical gears ISO system of accuracy Part 1: Defin
24、itions 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 allowable values of deviations relevant to radial composite deviations and runout information ISO/R 1938-1, ISO system of limits and f
25、its Part 1: Inspection of plain workpieces ISO 4156-1, Straight cylindrical involute splines Metric module, side fit Part 1: Generalities ISO 4156-2, Straight cylindrical involute splines Metric module, side fit Part 2: Dimensions ISO 5459, Technical drawings Geometrical tolerancing Datums and datum
26、-systems for geometrical tolerances -,-,- ISO 4156-3:2005(E) 2 ISO 2005 All rights reserved 3 Terms and definitions For the purpose of this document, the terms and definitions given in ISO 4156-1 apply. 4 Symbols and abbreviated terms NOTE Some of the symbols used might have a meaning other than the
27、 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 necessary to distinguish between them, since the context will always preclude any ambiguity. D Pitch
28、 diameter mm DFe max Maximum form diameter, external spline mm DFi min Minimum form diameter, internal spline mm DRe Diameter of measuring ball or pin for external spline mm DRi Diameter of measuring ball or pin for internal spline mm Db Base diameter mm Dee Major diameter, external spline mm Dee ma
29、x Maximum major diameter, external spline mm Dee min Minimum major diameter, external spline mm Dii Minor diameter, internal spline mm Dii min Minimum minor diameter, internal spline mm E Basic space width mm Emax Maximum actual space width mm Emin Minimum actual space width mm Er Eccentric radial o
30、ffset mm Ev Effective space width mm Ev max Maximum effective space width mm Ev min Minimum effective space width mm Fp Total cumulative pitch deviation m F Total profile deviation m F Total helix deviation m Ke Approximation factor for external spline Ki Approximation factor for internal spline MRe
31、 Measurement over two balls or pins, external splines mm MRi Measurement between two balls or pins, internal mm S Basic tooth thickness mm Smax Maximum actual tooth thickness mm Smin Minimum actual tooth thickness mm Sb Circular base thickness mm -,-,- ISO 4156-3:2005(E) ISO 2005 All rights reserved
32、 3 Sv max Maximum effective tooth thickness mm Sv min Minimum effective tooth thickness mm STA Statistical tolerance limit actual m, % STAabsolute Statistical tolerance limit actual absolute m, % STArelative Statistical tolerance limit actual relative % T Machining tolerance m Tv Effective clearance
33、 tolerance m W Measurement over k teeth, external spline mm aallowed Limited max. value of distance out of the actual tolerance limit m dce Ball or pin contact diameter, external spline mm dci Ball or pin contact diameter, internal spline mm i Integer inv Involute (=tan/180 ) k Number of measured te
34、eth m Module mm nallowed Max. allowed number of measured sizes outside tolerance limit pb Base pitch mm z Number of teeth Pressure angle ce Pressure angle at ball or pin diameter, external spline D Standard pressure angle at pitch diameter e Pressure angle at ball or pin centre, external spline i Pr
35、essure 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 temperature and inspection s
36、hall 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 measuring load. If mea
37、surements 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 the same surface
38、condition. -,-,- ISO 4156-3:2005(E) 4 ISO 2005 All rights reserved 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 toot
39、h thickness at the 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
40、 location of a spline is the location of the central axis in relation to any other geometrical element found by actual or effective inspection methods. -,-,- ISO 4156-3:2005(E) ISO 2005 All rights reserved 5 6.4 Form The form deviations of a spline are the deviations to the true geometrical form of
41、profile, helix and pitch. 7 Methods of inspection 7.1 Size 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. Fo
42、r the consequence of general methods, see Table 2. Table 1 Relationship between parameters and control method Minimum material Minimum effective clearance Maximum effective clearance Parameter Smin/Emax Sv max/Ev min Sv min/Ev max Standard method X X Method A X X X Method B X X Table 2 Consequence o
43、f general methods Inspection method Theoretical maximum clearance between mating parts (zero form deviation) Maximum deviation of form in each part (zero clearance) Standard 2 (T + ) T + Alternative A 2Tv T + Alternative B 2Tv Undetermined NOTE The theoretical maximum clearance between mating parts
44、in this table is for parts in their new condition. The clearance will 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 Dimen
45、sions over and between balls The dimension over or between balls 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 balls contact through one normal plane. The size me
46、asured over or between balls is a true size at 2 particular gaps and 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 o
47、n the actual tooth thickness or space width where the pins have a line contact. -,-,- ISO 4156-3:2005(E) 6 ISO 2005 All rights reserved Table 3 Size Inspection measuring instruments, methods and priorities Parameter Smin/Emax Sv max/Ev min Sv min/Ev max Smax/Emin Priority Method Highest Measurement over and between balls GO composite gauge NO GO composite gauge Measurement over and between balls Lower Measurement 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 M
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