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Actual Problems in Machine Building. Vol. 4. N 1. 2017
Innovative Technologies
in Mechanical Engineering
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THE CHOICE OF METHOD OF FINISHING PROCESSING TO IMPROVE
THE FATIGUE STRENGTH OF THE CAR ENGINE PARTS
Bychkov N.V.
, Maste
r’s
Degree student, e-mail:
buchon93@mail.ruGileta V.P.
, Ph.D. (Engineering), Associate Professor, e-mail:
gileta.viktor@yandex.ruBeznedelnyy A.I.
, Ph.D. (Engineering), Associate Professor, e-mail:
beznedelnyy@corp.nstu.ruNovosibirsk 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