BSI PD ISO/TS 6336-20:2017:2018 Edition
$189.07
Calculation of load capacity of spur and helical gears – Calculation of scuffing load capacity (also applicable to bevel and hypoid gears) — Flash temperature method
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 50 |
This document specifies methods and formulae for evaluating the risk of scuffing, based on Blok’s contact temperature concept.
The fundamental concept is applicable to all machine elements with moving contact zones. The flash temperature formulae are valid for a band-shaped or approximately band-shaped Hertzian contact zone and working conditions characterized by sufficiently high Péclet numbers.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 6 | Foreword |
| 7 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions, symbols and units 3.1 Terms and definitions 3.2 Symbols and units |
| 13 | 4 Scuffing and wear 4.1 Occurrence of scuffing and wear 4.2 Transition diagram |
| 15 | 4.3 Friction at incipient scuffing 5 Basic formulae 5.1 Contact temperature |
| 17 | 5.2 Flash temperature formula |
| 18 | 5.3 Transverse unit load |
| 19 | 5.4 Distribution of overall bulk temperatures |
| 20 | 5.5 Rough approximation of a bulk temperature 6 Coefficient of friction 6.1 General |
| 21 | 6.2 Mean coefficient of friction, method A 6.3 Mean coefficient of friction, method B 6.4 Mean coefficient of friction, method C |
| 22 | 7 Parameter on the line of action |
| 24 | 8 Approach factor |
| 25 | 9 Load sharing factor, XΓ 9.1 General 9.2 Spur gears with unmodified profiles |
| 26 | 9.3 Spur gears with profile modification |
| 28 | 9.4 Buttressing factor, Xbut,Γ |
| 29 | 9.5 Helical gears with εβ ≤ 0,8 and unmodified profiles 9.6 Helical gears with εβ ≤ 0,8 and profile modification |
| 30 | 9.7 Helical gears with εβ ≥ 1,2 and unmodified profiles 9.8 Helical gears with εβ ≥ 1,2 and profile modification |
| 32 | 9.9 Helical gears with 0,8 < εβ < 1,2 9.10 Narrow bevel gears 9.11 Wide bevel gears |
| 34 | 10 Scuffing temperature and safety 10.1 Scuffing temperature 10.2 Structural factor |
| 35 | 10.3 Contact exposure time |
| 36 | 10.4 Scuffing temperature in gear tests 10.5 Safety range |
| 38 | Annex A (informative) Flash temperature formula presentation |
| 45 | Annex B (informative) Optimal profile modification |
| 47 | Bibliography |
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BSI PD ISO/TS 6336-20:2017 – TC:2020 Edition
Tracked Changes. Calculation of load capacity of spur and helical gears – Calculation of scuffing…
