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

Order : | Dware |

Project : | HeliSpring |

Subproject : | Verification 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 |

Spring Specifications | Symbol | Unit | Value |
---|---|---|---|

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

Nominal diameter of wire | d | mm | 7.000 |

Coil space unloaded spring | a | mm | 0.140 |

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

Body length unloaded | L_{K0} |
mm | 1200.0 |

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

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

Distance force action point | L_{FA} |
mm | 20.0 |

Length of end | l_{A} |
mm | 6.0 |

Inner bending radius of end | r_{A} |
mm | 3.5 |

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

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

Distance of force action point | L_{FB} |
mm | 20.0 |

Length of spring end | l_{B} |
mm | 6.0 |

Inner bending radius of end | r_{B} |
mm | 3.5 |

Hand of coils | -- | -- | left |

Coiling | -- | -- | cold |

Shot peening | -- | -- | Yes |

Spring Load | Symbol | Unit | Value |

Loading by | -- | -- | tors revolut |

Minor number wind up revolutions | n_{rev1} |
rev | 0.900 |

Major number wind up revolutions | n_{rev2} |
rev | 6.500 |

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

Calculation of geometry | Symbol | Unit | Value |

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

Mean diameter of coil | D_{} |
mm | 53.00 |

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

Spring index | w | -- | 7.57 |

Number of active coils | n | -- | 168.00 |

Developed length of active coils | l | mm | 27998 |

Spring rate | R_{MRv} |
N.m/rev | 5.449 |

Coil pitch when unloaded | m_{0} |
mm | 7.140 |

Coil space unloaded spring | a | mm | 0.140 |

Max permissible space between coil | a_{max} |
mm | 12.77 |

Force in action point leg A | F_{A} |
N | 1771.100 |

Force in action point leg B | F_{B} |
N | 1771.100 |

Free body length | L_{K0} |
mm | 1206.5 |

Spring diagram | Symbol | Unit | Value |

Minor torsional moment | M_{1} |
N m | 4.905 |

Minor torsion angle | n_{rev1} |
rev | 0.900 |

Major torsional moment | M_{2} |
N m | 35.422 |

Major torsion angle | n_{rev2} |
rev | 6.500 |

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

Max permissible torsion angle | n_{revn} |
rev | 6.676 |

Strength calculation | Symbol | Unit | Value |

Stress correction factor | q | -- | 1.120 |

Corrected minor bending stress | σ_{bq1} |
N/mm˛ | 163 |

Corrected major bending stress | σ_{bq2} |
N/mm˛ | 1178 |

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

Safety factor major bend stress | S_{F} |
-- | 1.03 |

Strength domain | -- | -- | static |

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

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

Safety factor upper bending stress | S_{FO} |
-- | 1.03 |

Corrected lower bending stress | σ_{bqU} |
N/mm˛ | 163 |

Stroke bending stress | σ_{bqh} |
N/mm˛ | 1015 |

Permissible stroke bending stress | σ_{bqH} |
N/mm˛ | 1047 |

Safety fact stroke bending stress | S_{FH} |
-- | 1.03 |

Length - weight of wire | Symbol | Unit | Value |

Total length of developed wire | l_{w} |
mm | 28025 |

Mass of spring | m_{w} |
g | 8467 |

Spring work | Symbol | Unit | Value |

Minor spring work | W_{1} |
J | 13.869 |

Major spring work | W_{2} |
J | 723.330 |

Work exchange | D_{W} |
J | 709.461 |

Frequency analysis | Symbol | Unit | Value |

Natural revolv-frequency of coils | f_{a} |
Hz | 6.01 |