| information compression 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
compression spring calculation |
Material, quality category as
per DIN EN 15800 and a valid combination of diameter, spring forces, spring
deflections and lengths must be entered in the parameter
pre-settings.
|
Standard combinations include i.e.:
|
 Material, De or Di, F2, R |
| Material, De or Di, F2, R, L0 |
| Material, De or Di, F2, s2 |
| Material, De or Di, F2, s2, F1 or
s1 |
| Material, De or Di, F2, L2, L0 |
| Material, De or Di, F2, L2, F1 or
L1 |
| Material, d, De or Di, L0, L2, n |
|
Special case: By
selecting the "dynamic" function the computation can be executed for dynamic
uses.
|
| 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.
|
|
| Di = inner coil
diameter (mm) |
| De = outer coil
diameter (mm) |
| F1 = prestressed
spring force (N) |
| F2 = loaded
spring force (N) |
| s1 = prestressed
spring deflection (mm) |
| s2 = loaded
spring deflection (mm) |
| R = spring rate
(N/mm) |
| L0 = unstressed
spring length (mm) |
| L1 = prestressed
spring length (mm) |
| L2 = loaded
spring length (mm) |
|
| calculation according to paths and
forces |
In this case for a better overview, only the windows
for the calculation according to paths and forces are
available.
|
 |
| Di = inner coil
diameter (mm) |
| De = outer coil
diameter (mm) |
| L0 = unstressed
spring length (mm) |
| s1 = prestressed
spring deflection (mm) |
| F1 = prestressed
spring force (N) |
| s2 = loaded
spring deflection (mm) |
| F2 = loaded
spring force (N) |
|
| calculation according to lengths and
forces |
In this case for a better overview, only the windows
for the calculation according to lengths and forces are
available.
|
 |
| Di = inner coil
diameter (mm) |
| De = outer coil
diameter (mm) |
| L0 = unstressed
spring length (mm) |
| L1 = prestressed
spring length (mm) |
| F1 = prestressed
spring force (N) |
| L2 = loaded
spring length (mm) |
| F2 = loaded
spring force (N) |
|
| calculation according to dimension |
In this case for a
better overview, only the windows for the calculation according to dimensions
are available.
|
|
| d = wire diameter
(mm) |
| Di = inner coil
diameter (mm) |
| De = outer coil
diameter (mm) |
| L0 = unstressed
spring length (mm) |
| L1 = prestressed
spring length (mm) |
| L2 = loaded
spring length (mm) |
| 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 coils < n >
accordingly if required. The selection of wire diameter is compulsory. The
nearest five values are available for selection in the drop-down lists. In the
case of the pressure spring you should make sure that the total number of coils
(nt) ends in ½ to ensure an even fit for all coils, particularly in the
case of smaller numbers of coils.
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.
Additional functions for the compression spring
computation
Ground
ends
This function is a standard
default setting; it takes into account the change in the compression spring
with ground ends. The function can be deselected by clicking on < Ground
ends > with the mouse.
Dynamic
This function
is used to execute the computation for dynamic uses. Important, if < dynamic
> is selected the < shot peened > function should be
activated.
Diagrams
The diagrams
function provides you with the path-force diagram and the Goodmann diagram in
the case of dynamic calculation.
Important
Theoretic buckling limit
he buckling lengths and paths are
computed for the following 5 spring end supports in accordance with DIN EN
13906-1.
| Seat coefficients to EN
13906-1 / 9.14 |
 |
 |
 |
 |
 |
Picture 1
v = 2 |
Picture 2
v =
1 |
Picture 3
v = 1 |
Picture 4
v =
0,7 |
Picture 5
v =
0,5 |
|
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
catalogue springs are only supplied in the materials EN 10270-1 and EN
10270-3-1.4310. |
|