Determination of the main parameters for modeling the dynamic load process in drives of high-speed machines
( Pp. 54-60)

Introduction. The article is devoted to the study of the synthesized concept of frictional contact of solids in crank presses. As a result of the analysis, the possibility of obtaining the maximum load characteristic of the friction contact within the interval of variation of the friction coefficient has been established. The possibility of equality of the values of the friction force of the friction contact at the boundaries of the indicated interval in the presence of a maximum and the achievement of their greatest stability under these conditions is also revealed. Materials and methods. When the angle value changes, the position of the maximum point changes. Since only the angle ratio establishes the equality of the friction forces at the boundaries of the interval of variation of the friction coefficient, changing the position of the maximum point of the function leads to a violation of this equality. In this case, the accuracy coefficient should be determined by the ratio of the maximum of the function to the smallest boundary value. To do this, it is necessary to establish trends in the change of the boundary values of the function associated with the variation of the angle. To solve this problem, a new value of the pressure tangent was presented as a product of the coefficient of variation and the base value of the tangent angle. The results of the study. The results show a high stability of the friction force during sliding of the friction contact bodies, although at large values of the pressure angle of the sensitive elements of the transducer sensor, the maximum friction force may briefly be proportional to the current value of the friction coefficient. Discussion and conclusions. As we see, the upgraded concept of frictional contact allows theoretically to obtain a very high stability of the friction force, however, due to the relatively large value of the angle and force parameter, it is used inefficiently. A necessary condition for the absence of vanishing of the output parameter of the main friction group of the friction contact in the interval of variation of the friction coefficient and the presence of the maximum function of the load capacity of the friction contact is the transfer of its full load by the sensitive elements of the additional friction group. An additional condition for the existence of a maximum is the need for the sensitive elements of the main friction group to transfer part of its full load with an equal number of friction pairs of both friction groups, and the sensitive elements to transfer the full load of the main friction group with less than the additional friction group number of friction pairs.

Kobzev K.O., Vyalov S.A., Durov R.S., Varnakova E.V., Bozhko E.S., (2020), DETERMINATION OF THE MAIN PARAMETERS FOR MODELING THE DYNAMIC LOAD PROCESS IN DRIVES OF HIGH-SPEED MACHINES. Computational Nanotechnology, 4 => 54-60.

Dmitriev A.I., Popov V.L., Psakhie S.G. Simulation of surface topography with the method of mavable cellular automata // Tribology International. 2006. Vol. 39. No. 5. Pp. 444-449.
Osterle W., Dmitriev A., Klob H., Urban I. Towards a better understanding of brake friction materials // Wear. 2007. Vol. 263. No. 7-12. Pp. 1189-1201.
Mosey N.J., M ser M.H., Lipkowitz K.B., Cundari T.R. Atomistic modeling of friction // Reviews in Computational Chemistry. 2007. Vol. 25. Pp. 67-124.
Koskilinna J.O., Linnolahti M., Pakkanen T.A. Friction paths for cubic boron nitride: An ab initio study // Tribology Letters. 2007. Vol. 27. No. 2. Pp. 145-154.
Kobzev K., Chukarin A. Principles of improving the smoothness of the working mechanism in forging and stamping machines // IOP Conference Series: Earth and Environmental Science. 2019. No. 403. Pp. 12-145.
Kobzev K.O., Bozhko E.S., Mozgovoi A.V. et al. Theoretical foundations of the use of single-circuit negative feedback in safety friction clutches with differentiated friction pairs installed in forging equipment // IOP Conference Series: Materials Science and Engineering. 2019. No. 680. Pp. 12-14.
Kobzev K.O., Bozhko E.S., Mozgovoi A.V. et al. The study of the use of multi-disc safety friction clutches in the working bodies of crank presses // IOP Conference Series: Materials Science and Engineering. 2019. No. 680. Pp. 12-13.
Sidorenko V.S., Le CHung Kien. Modelirovanie dinamicheskoy sistemy lineynogo pozitsionirovaniya gidroprivoda podachi agregatnoy sverlil noy golovki stanka // Vestnik Don. gos. tekhn. un-ta. 2013. № 5/6 (74/75). S. 153-159.
SHishkaryev M.P. Komponovka bazovogo varianta adaptivnoy friktsionnoy mufty vtorogo pokoleniya // Sborka v mashinostroenii, priborostroenii. 2010. № 7. S. 16-20.
SHishkaryev M.P. Osobennosti komponovki modernizirovannogo varianta adaptivnoy friktsionnoy mufty pervogo pokoleniya // Sborka v mashinostroenii, priborostroenii. 2012. № 5. S. 28-35.
Grishchenko V.I., Sidorenko V.S. Modelirovanie protsessa pozitsionirovaniya ispolnitel nykh mekhanizmov tekhnologicheskogo oborudovaniya diskretnym pnevmogidravlicheskim ustroystvom s pnevmaticheskimi liniyami svyazi // Vestnik Don. gos. tekhn. un-ta. 2009. T. 9. № 2. S. 81-89.
Al -Kudakh A.M., Sidorenko V.S., Grishchenko V.I. Modelirovanie protsessa pozitsionirovaniya povorotno-delitel nykh mekhanizmov avtomaticheskogo tekhnologicheskogo oborudovaniya ustroystvami s gidravlicheskimi liniyami svyazi // Vestnik Don. gos. tekhn. un-ta. 2008. T. 8. № 4 (39). S. 191-201.
Rubanov V.V., Kolotienko S.D. Ustanovka dlya issledovaniya iznashivaniya naplavochnykh materialov pri trenii kacheniya // Vestnik Don. gos. tekhn. un-ta. 2011. T. 11. № 9 (60). S. 1646-1650.
Mukutadze M.A., Garmonina A.N., Prikhod ko V.M. Raschetnaya model upornogo podshipnika s poristym pokrytiem na poverkhnosti napravlyayushchey // Vestnik Don. gos. tekhn. un-ta. 2017. № 3 (90). S. 70-77.
Poleshkin M.S., Sidorenko V.S. Nestatsionarnye gidromekhanicheskie kharakteristiki protochnoy chasti upravlyayushchikh ustroystv klapannogo tipa // Vestnik Don. gos. tekhn. un-ta. 2012. T. 9, spets. vyp. S. 93-102.

crank press, friction coefficient, working mechanism, gain factor, overload, accuracy.