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1 2021

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Characterization of residual stresses induced into bearing rings by means of soft turning using different turning parameters

Zaghal Jawad, Mertinger Valeria, Filep Adam, Varga Gyula, Benke Marton

Journal of Machine Engineering

2021

Vol. 21, No. 4

49--56

Residual stresses are those stresses which remain in solid materials after removing the external load. Residual stresses which are induced by machining processes play important role in determining the service life of the machined components, depending on its magnitude, sign, and direction. This research provides a comprehensive correlation between three turning parameters and the resulting residual stresses formed on the surface of the outer ring of tapered roller needle bearing, made of 100CrMnSi6-4 type steel. The examined parameters were cutting speed, feed and tool nose radius. Radial and axial residual stresses on the surface were measured using sample cutting-free X-ray diffraction method. It is shown that the effect of one processing parameter can even be opposing depending on the other parameters. Thus, the effects of turning parameters on residual stresses must be examined in a comprehensive manner.