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The article presents the results of research of the process of treatment with a multi-contact vibration impact tool - ball-rod reinforcement. Theoretical constraints are derived to calculate surface roughness, depth of strengthened layer and degree of deformation. The formula for determining the processing time is presented. Reliability of technological process of treatment with ball-rod reinforcing agent is investigated. Method of process design with due regard to its reliability is presented.

The results of parts processing processes by dynamic methods of surface plastic deformation taking into account their reliability are presented. Dependencies are identified to determine surface roughness, depth of the hardened layer and degree of deformation for various dynamic methods of surface plastic deformation treatment. Processing time is defined. Studies of the considered technological processes reliability by technological parameters are carried out. Technological recommendations on design of technological processes and application of research results are given.