Control of the vibratory peening machine using the Almen intensity procedure

Author:  M. Paques1, K. Chouchane1, B. Changeux2, L. De La Torre1, J. Badreddine2, H. Y. Miao1, M. Levesque1, S. Turenne1 and E. Martin1 1 Département de Génie Mécanique, École Polytechnique de Montréal, C.P. 6079, Succ. Centre-Ville, Montréal, Québec, H3C 3A7, Ca
Source:  ICSP14 Milan
Doc ID:  2022098
Year of Publication:  2022
Abstract The effects of the vibratory peening process parameters on Almen intensity were investigated using the Design of Experiments (DOE) method. A specific vibratory peening machine was built. The tub vibrates vertically and rests on airbags. A non-standard fractional screening design was performed to evaluate the effects of the seven adjustable controlling parameters of the machine on Almen intensity. The Analysis of variance (ANOVA) showed that the eccentricity and frequency of the rotating shafts, and the media height above the treated specimen, were the parameters to adjust for the control of Almen intensity. A first order empirical model was fitted. The model included both primary factors and two-factor interactions. Its predictions showed that Almen intensity increases with the increase of the eccentricity, frequency and media height above the part. On the other hand, the media mass, airbag pressure, part position and lubrication rate did not show a significant influence on Almen intensity. Keywords Shot peening, Vibratory peening, Almen intensity, DOE method.

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