Abstract
Coupled bending-torsional vibrations of boring cantilever bars were studied in this work concerning the fine boring of small diameter deep holes. For determining the influence of the torsional shape on the excitation of the rising level oscillations, a number of experimental and theoretical studies were carried out. As a result, the amplitudes and frequencies of flexural and torsional oscillations were determined when changing the cantilever span and length, the ratio of the amplitudes of the components of flexural and torsional oscillations. A computational analysis of the dynamic system features has been carried out in work, making it possible to assess the vibration resistance of the boring process. A dynamic model has been developed, and motion equations have been composed for stability study, which determines the processing system's performance. The calculations used the algebraic Routh – Hurwitz stability criterion. Experiments were performed using vibration cutting to reduce the oscillation level when boring small diameter deep holes.
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The authors appreciate the support of the International Association for Technological Development and Innovations. The research has been carried out to fulfill the objectives of the perspective development plan within the scientific direction “Technical Sciences” at Sumy State University.
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Orgiyan, A., Oborskyi, G., Ivanov, V., Tonkonogyi, V., Balaniuk, A. (2022). Features of Flexural-Torsional Oscillations of Cantilever Boring Bars for Fine Boring of Deep Holes with Small Diameters. In: Tonkonogyi, V., Ivanov, V., Trojanowska, J., Oborskyi, G., Pavlenko, I. (eds) Advanced Manufacturing Processes III. InterPartner 2021. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-91327-4_10
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