Determination of the geometric parameters of a rotary roller to improve the stress-strain state of hardened parts

In this study, using computer simulation in the ANSYS environment, the stress–strain state and the regularities of the variation of transient and residual stresses in cylindrical parts during strengthening by a rotational roller were investigated. Rational geometric parameters of the rotational roller that contribute to improving the efficiency of the process were determined, including the roller diameter, profile radii, distance between profile peaks, number of sectors, groove width, inclination angle of the separating groove, and its fillet radius. Conditions ensuring continuous overlapping of the tracks left by the small and large radii of the roller were established. It was shown that the use of a rotational roller, compared with a smooth roller of the same diameter, leads to an increase in residual and transient stresses as well as the depth of plastic deformation, which indicates its higher efficiency. The obtained results can be applied in the design and optimization of technological processes for strengthening machine parts.
EDN: MJIMTI, https://elibrary/mjimti

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