The main advantage of the APM Screw module is that with its help at the design stage it is possible to take into account the influence of manufacturing errors on the parameters of the screw drive. This became possible thanks to the new theory of non-ideal contact, developed at the STC APM and having no analogues in the world. It is applicable to a wide range of machine elements such as rolling bearings, screw gears, flat joints, rolling and sliding guides, etc.
Due to the presence of roughness and shape errors in the contact surfaces, the interaction of the screw, nut and rolling elements is random and can only be correctly described using probabilistic methods. The use of APM Screw provides the user with a complete and comprehensive picture of the processes that occur during the operation of a screw drive. In fact, the Screw module allows you to simulate the behavior of a screw drive under given conditions.
The developed modeling methods are based on the analysis of the contact interaction of bodies and raceways in the form of contact forces. The values of these forces depend on the processing errors of the elements involved in the contact and their relative location. The solution in this formulation makes it possible to obtain output parameters in the form of not only average values, but also scattering values.