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Spring calculation

Material  
Lever leg RH mm Recumbent leg Leg length LSR mm Leg length LSH       mm
d (mm) Di De (mm) (N) (N) F1 F2 M1 M2 (mm) (Nmm) (Nmm) (°) a1                 a2 (°)     n   Calculation pre-settings


F1 M1 a1 F2 M2 a2 Fn Mn n RH a d Di LS Dd min Dd max a
Lk0 nt
For an explanation of the symbols used, please move the mouse pointer over the required symbol in the graphic.
Torsion spring - calculation - information - english - Gutekunst Federn
  information torsion spring calculation
This spring design program was created on the basis of the German standard for springs as well as our experience in production engineering. The computation can be carried out for compression, extension and torsion springs. The procedures use the same input logic typical for Windows, i.e. via keyboard and mouse.

No warranty is accepted for calculation results outside the production at "Gutekunst Federn".

  pre-setting torsion spring calculation

Material, quality category as per DIN 2194, the properties of the legs and a valid combination of diameter, spring forces, spring torques and rotating angle must be entered in the parameter pre-settings.
Standard combinations include i.e.:
 Material, RH, Di or De, M2, alpha2
 Material, RH, Di oder De, F2, alpha2
 Material, RH, Di oder De, M2, M1, alpha2
 Material, RH, Di oder De, M2, alpha1, alpha2
 Material, RH, Di oder De, alpha2, n

 material properties

 Designation,
 Material-description
Max. operating
temp
.
EN F
(AFNOR)
GB
(BS)
S
(SIS)
USA
(AISI)
G-module
EN 10270-1 type SM
Spring steel wire
For all common springs
80°C 10270-1 NFA
47-301-76
BS 5216-75 * AMS 5112
81500
EN 10270-1 type SH
Spring steel wire
For all common springs
80°C 10270-1 NFA
47-301-76
BS 5216-75 * AMS 5112
81500
EN 10270-1 type SH and DH
Spring steel wire
For all common springs
80°C 10270-1 NFA
47-301-76
BS 5216-75 * AMS 5112
81500
EN 10270-2 / VDC (unalloyed)
Valve spring wire
In high dynamical stress
80°C 10270-2 * * * *
79500
EN 10270-2 / VDSiCr (alloyed)
Valve spring wire
In high dynamical stress between 80 and 120° C
120°C 10270-2 * 2803 685A55HD * 6150
81500
1.4310 / X10CrNi188
Stainless steel V2A
High corrosion resistance
270°C 10270-3 Z12CN17.07 301S21 2330 302
73000
1.4568 / X7CrNiAI17-7
Spring steel V4A
Minimal relaxation, high dynamical stress
350°C 10270-3 Z8CNA17.07.01 301S81 2388 631
78000
CW507L / CuZn36
Copper wire
Non-magnetic, salt-water proof
60°C 12166 * * * *
35000
CW452K / CuSn6
Bronze alloy
Non-magnetic, solderable, weldable, corrosion resistant
60°C 12166 * * * *
39000

  You have 4 possibilities for entry:
 all calculation pre-settings
Here, all entry windows for the calculation are available.


 RH = distance between centre of spring body and power flow point on
             lever leg (mm)
 LsH = leg length of the lever leg (mm)
 LsR = leg length of the recumbent leg (mm)
 Di = inner coil diameter (mm)
 De = outer coil diameter (mm)
 F1 = prestressed spring force (N)
 F2 = loaded spring force (N)
 M1 = torque by angle alpha1 (Nmm)
 M2 = torque by angle alpha2 (Nmm)
 alpha1 = prestressed rotational angle (degrees)
 alpha2 = loaded rotational angle (degrees)

 calculation according to rotational angle and torque
In this case for a better overview, only the windows for the calculation according to rotational angle and torque are available.

 RH = distance between centre of spring body and power flow point on
             lever leg (mm)
 LsH = leg length of the lever leg (mm)
 LsR = leg length of the recumbent leg (mm)
 Di = inner coil diameter (mm)
 De = outer coil diameter (mm)
 M1 = torque by angle alpha1 (Nmm)
 M2 = torque by angle alpha2 (Nmm)
 alpha1 = prestressed rotational angle (degrees)
 alpha2 = loaded rotational angle (degrees)

 calculation according to rotational angle and spring force
In this case for a better overview, only the windows for the calculation according to rotational angle and force are available.

 RH = distance between centre of spring body and power flow point on
             lever leg (mm)
 LsH = leg length of the lever leg (mm)
 LsR = leg length of the recumbent leg (mm)
 Di = inner coil diameter (mm)
 De = outer coil diameter (mm)
 F1 = prestressed spring force (N)
 F2 = loaded spring force (N)
 alpha1 = prestressed rotational angle (degrees)
 alpha2 = loaded rotational angle (degrees)

 calculation according to dimension
In this case for a better overview, only the windows for the calculation according to dimensions are available.


 RH = distance between centre of spring body and power flow point on
             lever leg (mm)
 LsH = leg length of the lever leg (mm)
 LsR = leg length of the recumbent leg (mm)
 Di = inner coil diameter (mm)
 De = outer coil diameter (mm)
 alpha1 = prestressed rotational angle (degrees)
 alpha2 = loaded rotational angle (degrees)
 n = number of active coils (pc.)


  result page compression spring calculation

Once the computation has been started from the "Pre-settings", switch automatically to the "results" computing page which displays all the computed spring sizes.

To complete the calculation you are requested here to select the wire diameter < d > according to DIN EN 10218-2 and adapt the number of spring coils < n > accordingly if required. The nearest five values are available for selection in the drop-down lists. In the case of torsion springs, adaptation of the number of coils < n > changes the position of the leg.

The values entered from the "pre-setting" and the wire diameter < d > can be altered; they are displayed in white highlighted input fields. All other values are purely output values. The spring is recalculated on the basis of the modified values using the calculate button.

Invalid or faulty calculation results are displayed for you in the text box. Solution possibilities will be presented to you if you click on the individual fault messages.

Important

The tension coefficient "k" is incorporated as standard for the torsion spring computation. The tension coefficient "k" takes approximate account of the maximum computed tension of the spring body. Furthermore, due to the deflection of the non-fixed leg (lever leg), the "leg swivel" is included in the calculation. Bend stresses occurring are ignored !

leg swivel
 
Further functions of torsion spring calculation

Diagrams
The diagrams function provides you with the path-force diagram and the Goodmann diagram in the case of dynamic calculation.


  print / inquire / search

You can print the calculation or send it as an inquiry direct to Gutekunst Federn. When you have sent your inquiry you will receive a copy of your inquiry back directly by e-mail.

You can search our catalogue range directly for a suitable spring using the < Search catalogue > function. As a standard, the search program works with a tolerance value of 10%. Please note that our torsion catalogue springs are only supplied in the material EN 10270-3-1.4310.

Gutekunst Federn · Carl-Zeiss-Strasse 15 · D-72555 Metzingen
Phone 0049 71 23 9 60-0 · Fax 0049 71 23 9 60-195
order@gutekunst-co.com


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