SAE ANSI B 92 2M-1980 Metric Module Involute Splines (Includes B92 2Ma - 1984 Best Copy Available).pdf

1、ACCEPTANCE NOTICE This non-Goveniment document was adopted on 10 March 1981 and is approved for use by DoD. The indicated indusuy groups have furnished the clearances required by existing reguiarions. Copies of the docwnent are stocked by DoD Sie Stock Point. Naval Publications and Fms Center. Phhde

2、lphia,PA 19120,forissuetooDoD activicksody. Contractosandhduslry groups mustobtain copies direcuy hm SAE, 400 Commonwealth Drive, Warrerrdale, PA 15096. tk of Document MePic Module involute Splines Document No: ANSI B922M Date of Specific Issue Adopted: August 1980 Releasing Industry Group: Society

3、of Automotive Engineers, Inc. NOTICE: When reaffirmation, amendment, revision, or cancellailon of this standard is initially proposed. the industry group responsible for diis standard shall inform the military coordinating activity of the proposed change and request particiion. Custodians: Navy-AS A

4、rmy-AR Air FOm- 16 Review Activities: Navy-AS,YD hy-AT,AV,DH,EA,AT User Activities Army-ME Navy-S,SH / MilitaryC oordinating Activity: hy-AR Project DRPR-0210 AREADRPR The Engineering Society For Advancing Mobility -Land Sea Air and Space rn IN TERN ATIO NA L- Standard ANSI B92.2M - 1980 (R1989) (In

5、cludes B92.2Ma - 1984) o Approved by American National Standards Institute Metric Module Involute Splines Reprint STANDARD ANSI B92.2M - 1980 (R1989) (Includes B92.2Ma - 1984) e APPROVED BY AMERICAN NATIONAL STANDARDS INSTITUTE Reaffirmed January 26,1989 Sponsored by: Society of Automotive Engineers

6、, Inc. American Society of Mechanical Engineers Published by: Society of Automotive Engineers, Inc. 400 Commonwealth Drive Warrendale, PA 15096-0001 February 1989 An American National Standard implies a consensus of those sub- CAUTION NOTICE: This American National Standard may be revised or withdra

7、wn at any time. The procedures of the American National Standards Institute require that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of publication. Purchasers of American National Standards may receive current information on all standards by

8、 calling or writing the American National Standards Institute. stantially concerned with its scope and provisions. An American National Standard is intended as a guide to aid the manufacturer, the consumer, and the general public. The existence of an American National Standard does not in any respec

9、t preclude anyone, whether he has approved the standard or not. from manufacturing, marketing, purchasing, or using products, processes, or procedures not con- forming to the standard. American National Standards are subject to periodic review and users are cautioned to obtain the latest editions. I

10、SBN 0-89883-425-2 Copyright 1989 Society of Automotive Engineers, Inc. Printed in U.S.A. L technical reports, including standards approved and practices recommended, are advisory only. Their use by anyone engaged in in- dustry or trade or their use by governmental agencies is entirely Voluntary. The

11、re is no agreement to adhere to any SAE Standard or Recommended Practice, and no commitment to conform to or be guided by any technical report. In formulating and approving tech- nical reports, the Technical Board, its councils, and conimittees will not investigate or consider patents which may appl

12、y to the subject matter. Prospective users of the report are responsible for protecting themselves against liability for infringement of patenrs, trademarks, and copyrights. PRINTED IN U.S.A. DEDICATION This document is dedicated to the memoryof Leon N. DeVos. Mr. DeVos served as Chairman of the Nat

13、ional Involute Spline Committee for 24 years and was especially instrumental in the development of this truly international standard. ANSI COMMITTEE B92 INVOLUTE SPLINES AND INSPECTION OFFICERS D. L. Thurman, Chairman R. W. Cedoz, Secretary E. J. Bistrick National Broach flat root and fillet root si

14、de fits; the four tolerance classes 4,6, 6, and 7; tables for a single fit class; and the effective fit concept. Among the major differences are: use of the module in place of pitch; dimensions are in millimeters rather than inches; the “basic rack“; removal of the major diameter fit; and use of the

15、 IS0 symbols in place of those previously used. In addition, provision has been made for calculating three defined clearance fits, although tables for these fits are not included. This standard recognizes the fact that proper assembly between mating splines is dependent only on the spline being with

16、in effective specifications from the tip of the tooth to the form diameter. Therefore, the internal component major diameter is shown as a maximum dimension and the external component minor diameter is shown as a minimum dimension. The minimum internal major diameter and the maximum external minor d

17、iameter must clear the specified form diameter and thus do not need any additional control. Ail dimensions listed in this standard are for the finished part. Therefore, any compensation that must be made for operations which take place during processing, such as heat treatment, must be taken into ac

18、count when selecting the tolerance level for manufacturing. The standard has the same internal minimum effective space width and external maximum effective tooth thickness for ali tolerance classes. This basic concept makes it possible to have interchangeable assembly between mating splines made to

19、this standard regardless of the tolerance class of the individual members. This allows a tolerance class nix“ of mating members which often is an advantage where one member is considerably less difficult to produce than its mate, and the “average“ tolerance applied to the two units is such that it s

20、atisfies the design need. For instance, this can be the result of specification of Class 5 tolerance to one member and Class 7 to its mate, thus approximating a Class 6 assembly tolerance. In the event the fit as provided in this standard does not satisfy a particular design need and a specific amou

21、nt of effective clearance or press fit is desired, the change shall be made only to the external spline by a reduction or an increase in effective tooth thickness and a like change in actual tooth thickness. The minimum effective space width, in this standard, is always basic. This basic minimum eff

22、ective space width should always be retained when special designs are derived from the concept of this standard. TABLE OF CONTENTS PART I . GENERALITIES 1 List of Figures in Part I List of Tables in Part I 1 . Scope and Field of Application . 1 2 . Spline Terms and Definitions . 1 3 . Symbols 4 4 .

23、Pressure Angle (Standard) 10 5 . %ofFit 10 6 . Space Width and Tooth Thickness. Total Tolerance (T +A) . 10 7 . Basic Rack Profiles for Spline . 10 8 . Spline Machining Tolerances and Variations 11 9 . Effect of Spline Variations . 16 16 11 . Use of Effective and Actual Dimensions for Space Width an

24、d Tooth Thickness . 19 12 . DrawingData . 21 10 . Effective and Actual Dimensions for Splines . PART II . DIMENSIONS 27 List of Figures in Part II List of Tables in Part II 1 . 30 Deg Pressure Angle . Flat Root 28 2 . 30 Deg Pressure Angle . Fillet Root . 56 4 . 46 Deg Pressure Angle - Wet Root . 11

25、2 5 . AppendixA . 131 6 . AppendixB . 207 3 . 37.5 Deg Pressure Angle - Fiilet Root . 84 PART III . INSPECTION . 227 List of Figures in Part III List of Tables in Part III 1 . Scope andField of Application . 229 2 . Temperature of Reference . 229 3 . Inspection With Limit Gages . 229 4 . Manufacturi

26、ng Tolerances for Spline Gages . 231 5 . Length of Measuring Part of Gages 235 6 . Handles of Spline Gages . 236 7 . Values of Variation Allowances of Spline Gages 236 8 . Dimensions, Designation. and Marking of Gages 237 9 . AnalyticalInspection . 246 10 . InspectionDimensions 264 11 . References 2

27、54 PART I GENERALITIES 1. SCOPE AND FIELD OF APPLICATION This standard provides data and guidance for the design, manufacture, and inspection of straight, non-helical, cylindri- cal involute splines. It establishes a specification based on the metric module within the range 0.25-10 inclusive, relati

28、ng to nominal pressure angles of 30 deg, 37.5 deg, and 45 deg. For computer programming, the term “37.5 deg” has been adopted instead of “37 deg, 30 min”. Limiting dimensions, variations, and manufacturing toler- ances and their effect on the fit between connecting Co-axial spline elements, are defi

29、ned and tabulated. Linear dimensions are expressed in millimeters and micrometers. Angular dimen- sions are expressed in degrees and decimal degrees. List of Figures in Part I Figure - 1. 2A. 2B. 2c. 2D. 3. 4. 5. 6. 7. 8. 9. 10. Table 1. 2. 3. 4. - Lead variations Profile of the basic rack for 30 de

30、g flat root spline Profile of the basic rack for 30 deg fillet root spline Profile of the basic rack for 37.5 deg filet root spline Profile of the basic rack for 45 deg fillet root spline Profile variations Graphical illustration of spline fit classes Effect of variations on internal spline Effect o

31、f Variations on external spline Spline terms, symbols, and drawing data- flat root, 30 deg pressure angle, modules 0.5 to 10 Spline terms, symbols, and drawing data- fillet root, 30 deg pressure angle, modules 0.5 to 10 Spline terms, symbols, and drawing data- fillet root, 37.5 deg pressure angle, m

32、odules 0.5 to 10 Spline terms, symbols, and drawing data- filet root, 45 deg pressure angle, modules 0.25 to 2.5 List of Tables in Part I Basic dimensions for splines Formulae for dimensions and tolerances for all fit classes Graphic display of space width and tooth thickness tolerance zones Tooth t

33、hickness modification Page 4 11 11 11 11 12 14 19 19 - 22 23 24 25 Page 3 7 9 15 - List of Tables in Part I Table Page - - 5. Reduction of external spline major and minor diameters required for application of selected fit classes 16 Tolerances for internal spline minor diameter and extemal spline ma

34、jor diameter 17 Minimum fillet radius of internal or external splines resulting from fillet radius of basic rack 18 Specification guide for space width and tooth thickness 20 6. 7. 8. 2. SPLINE TERMS AND DEFINITIONS 2.1 Spline-A machine element consisting of integral teeth or spaces equally spaced a

35、round a circle or portion thereof. 2.2 Involute Spline-A spline having teeth with involute pro- files. 2.3 Internal Spline-A spline formed on the inner surface of a cylinder. 2.4 External Spline-A spline formed on the outer surface of a cylinder. 2.5 Fiiiet-The concave portion of the tooth profile w

36、hich joins the sides to the bottom of the space. 2.6 Fillet Root Spline-A spline in which the largest practi- cal filets join the areas of major or minor circles to the tooth sides while still allowing the smallest practical flat at the space centerline so that good tool life is achieved (See Figs.

37、2B, 2C, 2D, 8,9, and 10). 2.7 Flat Root Spline-A spline in which fillets join the arcs of major or minor circles to the tooth sides according to the basic tooth form shown in Figs. 2A and 7. 2.8 Module, m-The ratio of the circular pitch, expressed in millimeters, to the number n (or the ratio of the

38、 pitch diameter, expressed in millimeters, to the number of teeth). 2.9 Pitch Circle-The reference circle at which ail circular spline dimensions are assigned and the circle on which the specified pressure angle has its nominal value. 2.10 Pitch Diameter, D-The diameter of the pitch circle. 2.11 Pit

39、ch Point-The intersection of the spline tooth pro- file with the pitch circle. 2.12 Circular Pitch, p-The arc length along the pitch circle between corresponding points of adjacent spline teeth. 2.13 Pressure Angle, a -The acute angle between a radial line passing through any point on a tooth flank

40、and the tangent line to the flank at that point. 2.14 Standard Pressure Angle, a ,-The pressure angle at the pitch point. 2.15 Base Circle-The reference circle from which involute spline tooth profiles are generated. 2.16 Base Diameter, DB-The diameter of the base circle. 1 2.17 Base Pitch, b-The ar

41、c length along the base circle be- tween two consecutive corresponding flanks. 2.18 Major Circle-The circle formed by the outermost sur- face of the spline. 2.19 Major Diameter, DEE, DEI-The diameter of the major circle. 2.20 Minor Circle-The circle formed by the innermost sur- face of the spline. 2

42、.21 Minor Diameter, DIE, Dll-The diameter of the minor circle. 2.22 Form Circle-The circle which establishes the depth of involute form control of the tooth or space profile.It islocated near and inside the major circle on the internal spline, and near and outside the minor circle on the external sp

43、line. 2.23 Form Diameter, DFE, DFI-The diameter of the form circle. 2.24 Depth of Engagement-The radial distance from the minor circle of the internal spline to the major circle of the ex- ternal spline. 2.25 Basic Circular Space Width Ebsc or Basic Circular Tooth Thickness Sb for an external spline

44、, it is the difference between the maximum effective circular tooth thickness and the minimum actual circular tooth thickness (See par. 6). 2.42 Length of Engagement, ga -The axial iengh of con- tact between mating splines. 2.43 Active Spline Length, g,-The length of spline which contacts the mating

45、 spline. On sliding splines it exceeds the length of engagement. 2.44 Basic Dimension-A numerical value, expressed in ap- propriate units of measure, to describe the theoretically exact size, shape or location of a feature. 2.45 Reference-As used in this standard, reference is an added notation or m

46、odifier to a dimension, specification, or note when that dimension, specification, or note is: 1. Repeated for drawing clarification. 2. Needed to define a nonfeature datum or basis from which a form or feature is generated. 3. Needed to define a nonfeature dimension from which other specifications

47、or dimensions are developed. 4. Needed to define a nonfeature dimension at which toler- anced sizes of a feature are specified. 5. Needed to define a nonfeature dimension from which con- trol tolerances or sizes are developed or added as useful infor- mation. Any dimension, specification, or note th

48、at is noted “REF” shall not be used as a criterion for part acceptance or rejection. 2.46 Tooth Side (Flank)-As referred to in this standard, that surface of the tooth limited by the major diameter and the form diameter on the external spline, and the minor diameter and the form diameter on the inte

49、rnal spline and having an in- volute profile for the specified spline length. 2.47 Tooth Thickness Modification(es)-Reduction of circu- lar tooth thickness for the required fit class (See par. 5.2). 2 Modub m Bs*c Space width or Tooth Thickness on Pitch CidE E radial pertaining to a fillet or profile any assumed condition (Oz, DZ) index 092.1 I O - b C e F I V Computer Form II EE - 0 C E F I v WA R GG D IE El RI RF U - 6 Table 2-Formulae for Dimensions and Tolerances for All Fit Clases Term Pitch dia Base dia Circular pitch Base pitch Tooth thickness modification Min major dia, int 30