Operating force

The operating force in connection with the assembly preload indicates the forces acting statically or dynamically on the screw . In the case of dynamic loads, the maximum values ​​must always be used in the calculations!

A distinction is made between the total operating force and the operating force per screw. The only difference is that the total operating force results from multiplying the screw operating force by the number of bolts : ${\displaystyle F_{\mathrm {A} }}$ ${\displaystyle F_{\mathrm {AS} }}$ ${\displaystyle z}$

${\displaystyle F_{\mathrm {A} }=z\cdot F_{\mathrm {AS} }}$ .

In general, the operating force is nothing other than the force acting on the parts to be joined , which tries to drive these parts apart. Usually this is a pressure force on a surface (see piston or pressure vessel ). This results in the following for the entire operating force:

${\displaystyle F_{\mathrm {A} }=A\cdot p}$with as area and pressure ${\displaystyle {A}}$ ${\displaystyle {p}}$

The operating force per screw results as already described above as:

${\displaystyle F_{\mathrm {AS} }={\frac {F_{\mathrm {A} }\cdot S}{z}}}$with security (depending on the application and usually given in standards ) ${\displaystyle {S}}$

See also

• Joining (manufacturing technology)
• Clamping force
• Assembly preload