Actual Problems in Machine Building 2017 Vol. 4 No. 1

Actual Problems in Machine Building. Vol. 4. N 1. 2017 Innovative Technologies in Mechanical Engineering ____________________________________________________________________ 40 4. Рахимянов Х.М., Семенова Ю.С. Прогнозирование геометрического состояния поверхности цилиндрических деталей из стали 45 при ультразвуковом поверхностном пластическом деформировании // Обработка металлов (технология, оборудование, инструменты). – 2011. – № 3. – С. 11–17. 5. Гилета В.П., В.Б. Асанов, А.И. Безнедельный . Обработка шеек коленвалов ультразвуковым инструментом // Новые материалы и технологии в машиностроении: сб. науч. тр. по итогам междунар. науч.-техн. конф. – Брянск: БГИТА, 2007. – Вып. 7. – С. 8–12. THE CHOICE OF METHOD OF FINISHING PROCESSING TO IMPROVE THE FATIGUE STRENGTH OF THE CAR ENGINE PARTS Bychkov N.V. , Master’s Degree student, e-mail: buchon93@mail.ru Gileta V.P. , Ph.D. (Engineering), Associate Professor, e-mail: gileta.viktor@yandex.ru Beznedelnyy A.I. , Ph.D. (Engineering), Associate Professor, e-mail: beznedelnyy@corp.nstu.ru Novosibirsk State Technical University, 20 Prospekt K. Marksa, Novosibirsk, 630073, Russian Federation Abstract The article provides an analysis of the engine parts working in fatigue under cyclic loads. It is revealed that the main part of the engine working on cyclic fatigue is the rod that takes the force from the gases at a working course from the piston pin and passes it to the crank of the crankshaft and moves the piston when performing intermediate processes (cycles).The analysis of methods of increasing the fatigue strength of the connecting rod of the vehicle conducted. It is revealed that the method of surface plastic deformation is more streamlined and has several advantages in comparison with other methods .The method of increasing the fatigue strength in the ultrasonic container selected. Paper discuss the algorithm of processing in an ultrasonic container steel balls, describes the adaptations made by means of hardening of the connecting rod of the vehicle. Profilograms of samples before processing and after are presented. It is found that after processing in an ultrasonic container work parts which have residual stress of compression, increased microhardness and low roughness, prevents the nucleation of fatigue fissure. Keywords production rods, treatments, endurance failure, surface plastic deformation, rational choice, roughness, ultrasound