Berezhnoy V. Study is stress strain state of spur gears with con-trolled rigidity gearing on stage of designing

Subject of research is the standard and modified involute spur gear (ISG). The aim is determination of rational parameters of modification tooth ISG on stage of designing by means of developed strategies a calculation stress strain state of modification tooth. Methods of research are the fundamental positions of theory gearing with use the methods of mathematical theory of bounce, the theories of toughness. Criterion of choice optimum parameters of modification tooth ISG are defined; strategy a calculation and designing for these gears is developed. Strategy of rational choice of modifications ISG is created; correlation of rigidity and stress bending of tooth from parameters different types of modifica-tion tooth ISG are received. Recommendations is sent enter-prises in SEI Reduktor (c.Kiev), Machine-building plant (c.Doneck), Reduktor plant (c.Maikop). At industrial plants, in design institutes and during learning process.