HELICAL SPRINGS | |
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FOLLOWING DIN EN 13906-1,2,3 | |

Order : | Dware |

Project : | HeliSpring |

Subproject : | Dimensioning Torsion Spring |

Project item : | Spring for Sectional Car Port |

Spring ID : | 60x1200 |

Calculated by : | André Dewispelaere |

Organization : | Dware |

Date : | 26/07/2021 |

Spring wire grade |
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Nr, Cl, Spring Wire Grade , E, G, rho, Rm1, Rco |

230, FD, EN 10270-2 FDSiCr , 206000, 79500, 7.85, 2000, 320 |

Calculated wire properties | Symbol | Unit | Value |
---|---|---|---|

Wire diameter | d | mm | 7.000 |

Minimum value tensile strength | R_{m} |
N/mm˛ | 1730 |

Modulus of rigidity | G | N/mm˛ | 79500 |

Modulus of Elasticity | E | N/mm˛ | 206000 |

Design Specifications | Symbol | Unit | Value |
---|---|---|---|

Minor torsional moment | M_{1} |
N m | 8.000 |

Major torsional moment | M_{2} |
N m | 32.200 |

Major number wind up revolutions | n_{rev2} |
rev | 7.000 |

Number of loading cycles | N_{cy} |
Mcy | 0.010 |

Inside diameter not less than | D_{i} |
mm | 46.00 |

Approximate coil space unloaded | a | mm | 0.00 |

Forming | -- | -- | cold |

Hand of coiling | -- | -- | right |

Shot peening | -- | -- | Yes |

Calculation of geometry | Symbol | Unit | Value |

Calculated wire diameter | d_{c} |
mm | 6.56 |

Selected wire diameter | d | mm | 7.000 |

Minimum diameter of wire | d_{min} |
mm | 6.350 |

Choosen mean diameter of coil | D_{} |
mm | 53.00 |

Spring index | w | -- | 7.57 |

Outside diameter of spring | D_{e} |
mm | 60.00 |

Inside diameter of spring | D_{i} |
mm | 46.00 |

Choosen coil pitch unloaded | m_{0} |
mm | 7.100 |

Resulting coil space unloaded | a | mm | 0.100 |

Max permiss space between coils | a_{max} |
mm | 12.77 |

Choosen number of active coils | n | -- | 168.00 |

Body length when unloaded | L_{W} |
mm | 1199.8 |

Length of evolved active coils | l | mm | 27998 |

Angular spring rate | R_{MRv} |
N.m/rev | 5.450 |

Type of spring end A | ET_{A} |
-- | rad inside |

Number of inactive coils A | n_{naA} |
-- | 0.00 |

Distance of force action point | L_{FA} |
mm | 16.0 |

Length of end A | l_{A} |
mm | 7.0 |

Inner bending radius end A | r_{A} |
mm | 7.0 |

Major force acting on spring end | F_{A} |
N | 2012.500 |

Type spring end B | ET_{B} |
-- | rad inside |

Number of inactive coils B | n_{naB} |
-- | 0.00 |

Distance force action point | L_{FB} |
mm | 16.0 |

Length of end B | l_{B} |
mm | 7.0 |

Inner bending radius of end B | r_{B} |
mm | 7.0 |

Major force acting on spring end | F_{B} |
N | 2012.500 |

Total number of coils | n_{t} |
-- | 168.00 |

Total free state body length | L_{0} |
mm | 1199.8 |

Calculation spring diagram | Symbol | Unit | Value |

Minor torsional moment | M_{1} |
N m | 8.000 |

Minor torsion angle | n_{rev1} |
rev | 1.468 |

Major torsional moment | M_{2} |
N m | 32.200 |

Major torsion angle | n_{rev2} |
rev | 5.909 |

Max permissible torsional moment | M_{n} |
N m | 36.380 |

Max permissible torsion angle | n_{revn} |
rev | 6.680 |

Strength calculation | Symbol | Unit | Value |

Stress correction factor | q | -- | 1.120 |

Minor corrected bending stress | σ_{bq1} |
N/mm˛ | 266 |

Major corrected bending stress | σ_{bq2} |
N/mm˛ | 1071 |

Permissible static bending stress | σ_{bP} |
N/mm˛ | 1210 |

Safety factor stat bending stress | S_{F} |
-- | 1.27 |

Strength domain | -- | -- | static |

Permissible endurance stress | σ_{eN} |
N/mm˛ | 1210 |

Permissible upper bending stress | σ_{bqO} |
N/mm˛ | 1210 |

Safety factor on upper bend stress | S_{FO} |
-- | 1.13 |

Torsion stroke bending stress | σ_{bqh} |
N/mm˛ | 805 |

Permissible stroke bending stress | σ_{bH} |
N/mm˛ | 944 |

Safety factor stroke stress | S_{FH} |
-- | 1.17 |

Length of wire and mass | Symbol | Unit | Value |

Evolved length of wire | l_{w} |
mm | 28031 |

Spring mass | m_{w} |
g | 8468 |

Spring work | Symbol | Unit | Value |

Minor spring work | W_{1} |
J | 36.895 |

Major spring work | W_{2} |
J | 597.719 |

Work exchange | D_{W} |
J | 560.824 |