BS-ISO-6336-3-1996.pdf
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1、BRITISH STANDARD BS ISO 6336-3:1996 Implementation of ISO 6336-3:1996 Calculation of load capacity of spur and helical gears Part 3: Calculation of tooth bending strength ICS 21.200 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 6336
2、-3:1996 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1997 BSI 01-1999 The following BSI references relate to the work on this standard: Committee referenc
3、e MCE/5 Draft for comment 90/77564 DC ISBN 0 580 26619 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee MCE/5, Gears, upon which the following bodies were represented: British Engineering Cutting Tools Association Britis
4、h Gear Association British Horological Federation British Horological Institute Engineering Equipment and Materials Users Association Federation of Manufacturers of Construction Equipment and Cranes Gauge and Tool makers Association Institution of Mechanical Engineers Lloyds Register of Shipping Lon
5、don Underground Ltd. Ministry of Defence Power Generation Contractors Association PGCA (BEAMA Ltd.) Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 6336-3:1996 BSI 01-1999i Cont
6、ents Page Committees responsible Inside front cover National foreword iii Foreword ii Introduction 1 1 Scope 1 2 Normative references 1 3 Tooth breakage and safety factors 1 4 Basic formulae 2 5 Form factors, YF and YFa; Tip factor, YFS 9 6 Stress correction factors, YS and YSa 35 7 Contact ratio fa
7、ctor, Ye45 8 Helix angle factor, Yb 46 9 Reference stress for bending 47 10 Life factor, YNT 47 11 Sensitivity factors, Yd, YdT, Ydk and relative notch sensitivity factors, Ydrel T, Ydrel k 48 12 Surface factors, YR, YRT, YRk, and relative surface factors, YR rel T and YR rel k 60 13 Size factor, YX
8、64 Annex A Bibliography 67 Figure 1 Graphical determination of the permissible bending stress for a limited life, In accordance with method B 6 Figure 2 Dimensions and basic rack profile of the teeth (finished profile) 9 Figure 3 Determination of the normal chordal dimensions of the tooth root criti
9、cal section for Method B. 10 Figure 4 Parameters for the determination of form factor, YF, for internal gearing (method B) 13 Figure 5 Determination of the normal chordal dimensions of the tooth root critical section for Method C 14 Figure 6 Parameters for the determination of form factor, YF, for i
10、nternal gearing (Method C) 15 Figure 7 Determinant load application position for the calculation of form factor, YF, and stress correction factor, Ys, as a function of the virtual profile contact ratio, ean17 Figure 8 Virtual number of teeth, zn (graph for approximate estimation) 18 Figure 9 Form fa
11、ctor, YFa, for external gearing with basic rack profile: an = 20; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,25 19 Figure 10 Form factor, YFa, for external gearing with basic rack profile: an = 20; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,3 20 Figure 11 Form factor, YFa, for external gearing with basic ra
12、ck profile: an = 20; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,375 21 Figure 12 Form factor, YFa, for external gearing with basic rack profile: an = 20; haP/mn = 1,0; hfP/mn = 1,35; fP/mn = 0,3 22 Figure 13 Form factor, YFa, for external gearing with basic rack profile: an = 20; haP/mn = 1,2; hfP/mn =
13、1,5; fP/mn = 0,3 23 Figure 14 Form factor, YFa, for external gearing with basic rack profile: an= 20; haP/mn = 1,0; hfP/mn = 1,4; fP/mn = 0,4; spr = 0,02 mn 24 Figure 15 Form factor, YFa, for external gearing with basic rack profile: an = 22,5; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,4 25 Licensed Co
14、py: sheffieldun sheffieldun, na, Sun Nov 26 06:15:03 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 6336-3:1996 ii BSI 01-1999 Page Figure 16 Form factor, YFa, for external gearing with basic rack profile: an = 25; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,318 26 Figure 17 Tip factor, YFS (= YFa YSa
15、) for external gearing with basic rack profile: an = 20; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,25 27 Figure 18 Tip factor YFS (= YFa YSa) for external gearing with basic rack profile: an = 20; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,3 28 Figure 19 Tip factor, YFS (= YFa YSa) for external gearing wit
16、h basic rack profile: an = 20; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,375 29 Figure 20 Tip factor YFS (= YFa YSa) for external gearing with basic rack profile: an = 20; haP/mn = 1,0; hfP/mn = 1,35; fP/mn = 0,3 30 Figure 21 Tip factor, YFS (= YFa YSa) for external gearing with basic rack profile: an
17、= 20; haP/mn = 1,2; hfP/mn = 1,5; fP/mn = 0,35 31 Figure 22 Tip factor YFS (= YFa YSa) for external gearing with basic rack profile: an = 20; haP/mn = 1,0; hfP/mn = 1,4; fP/mn = 0,4; spr = 0,02 mn 32 Figure 23 Tip factor YFS (= YFa YSa) for external gearing with basic rack profile: an = 22,5; haP/mn
18、 = 1,0; hfP/mn = 1,25; fP/mn = 0,4 33 Figure 24 Tip factor YFS (= YFa YSa) for external gearing with basic rack profile: an = 25; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,318 34 Figure 25 Form factor, YSa, for external gearing with basic rack profile: an = 20; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,25
19、 37 Figure 26 Form factor, YSa, for external gearing with basic rack profile: an = 20; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,3 38 Figure 27 Form factor, YSa, for external gearing with basic rack profile: an = 20; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,375 39 Figure 28 Form factor, YSa, for external
20、 gearing with basic rack profile: an = 20; haP/mn = 1,0; hfP/mn = 1,35; fP/mn = 0,3 40 Figure 29 Form factor, YSa, for external gearing with basic rack profile: an = 20; haP/mn = 1,2; hfP/mn = 1,5; fP/mn = 0,3 41 Figure 30 Form factor, YSa, for external gearing with basic rack profile: an= 20; haP/m
21、n = 1,0; hfP/mn = 1,4; fP/mn = 0,4; spr = 0,02 mn 42 Figure 31 Form factor, YSa, for external gearing with basic rack profile: an = 22.5; haP/mn = 1,0; hfP/mn = 1,25; fP/mn = 0,4 43 Figure 32 Form factor, YSa, for external gearing with basic rack profile: an = 25; haP/mn = 1,0; hfP/mn = 1,25; fP/mn
22、= 0,318 44 Figure 33 Notch Dimensions 45 Figure 34 Contact ratio factor (root), Y for an = 20 46 Figure 35 Helix factor, Y 47 Figure 36 Life factor, YNT (for standard reference test gears) 49 Figure 37 Relative notch sensitivity factor, Y d rel T, for reference stress (YSa is valid for sFn/hFa = 1,1
23、) 56 Figure 38 Relative notch sensitivity factor, Yd rel T, for static stress 57 Figure 39 Sensitivity factor, Yd, for reference stress (YSa is valid for SFn/hFa 1,1) 58 Figure 40 Sensitivity factor, Yd, for static stress 59 Figure 41 Relative surface factor, YR rel T (derived from Figure 42) 61 Fig
24、ure 42 Surface factors, YR and YRk (related to the smooth polished test piece) 63 Figure 43 Size factor, YX, for tooth bending strength 65 Table 1 Life factor, YNT 50 Table 2 Values for slip-layer thickness 952 Table 3 Size factor (root), YX 65 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26
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