BS EN 13906-3:2014
$142.49
Cylindrical helical springs made from round wire and bar. Calculation and design – Torsion springs
| Published By | Publication Date | Number of Pages |
| BSI | 2014 | 26 |
This European Standard specifies the calculation and design of cold and hot coiled cylindrical helical torsion springs with a linear characteristic, made from round wire and bar of constant diameter with values according to Table 1.
Table 1
a The user of this European Standard shall pay attention to the design of hot coiled springs, because there can be differences between the design and a real test.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | Foreword |
| 6 | 1 Scope Table 1 2 Normative references 3 Terms and definitions, symbols, units and abbreviated terms 3.1 Terms and definitions |
| 7 | 3.2 Symbols, units and abbreviated terms Table 2 |
| 9 | 4 Theoretical torsion spring diagram |
| 10 | Figure 1 — Theoretical torsion spring diagram |
| 11 | Figure 2 — Open coiled torsion spring Figure 3 — Torsion spring with tangential ends |
| 12 | Figure 4 — Torsion spring with radial ends 5 Design Principles 5.1 General 5.2 Design of the ends |
| 13 | 5.3 Mounting of the ends Figure 5 — Clamped end Figure 6 — Not clamped end 5.4 Design of the spring body |
| 14 | 6 Types of loading 6.1 General 6.2 Static and quasi-static loading 6.3 Dynamic loading |
| 15 | 7 Stress correction factor q Figure 7 — Stress correction factor q depending on the spring index w and/or on the ration |
| 16 | 8 Material property values for the calculations of springs Table 3 Table 4 — Reference data for the modulus of elasticity and shear modulus (mean values) a, b, c for stainless steel wire (according to EN 10270-3) |
| 17 | 9 Design formulate 9.1 Design assumptions 9.2 Formulae 9.2.1 General 9.2.2 Spring torque 9.2.3 Angular spring rate |
| 18 | 9.2.4 Developed length of active coils 9.2.5 Nominal diameter of wire or bar 9.2.6 Inside coil diameter of the spring 9.2.7 Outside coil diameter of the spring 9.2.8 Body length of the spring (excluding ends) 9.2.9 Number of active coils 9.2.10 Torsional angle |
| 19 | 9.2.11 Spring work 9.2.12 Uncorrected bending stress 9.2.13 Corrected bending stress |
| 20 | Figure 8 — as a function for a radial end |
| 21 | Figure 9 — as a function for a tangential end |
| 22 | 10 Permissible bending stress 10.1 Permissible bending stress under static or quasi-static loading 10.2 Permissible stress range under dynamic loading 10.2.1 Fatigue strength values 10.2.2 Permissible stress range |
| 23 | Figure 10 — Fatigue strength diagram for torsion spring made of patented drawn wire grade DH according to EN 10270-1 without shot peening 10.2.3 Lines of equal stress ratio |
| 24 | Bibliography |
