Ensuring surface quality in AlMn alloy items during high-frequency wave impact boring
V. V. Maksarov, А. О. Minin, V. P. Zakharova
Abstract
This paper examines the problem of build-up formation when making bore holes in items made of aluminium alloy AlMn, which can lead to increased roughness of the machined surface. The authors analyzed factors influencing the build-up formation when machining the said alloy. It is proposed to use high-frequency wave impacts for making bore holes in items made of corrosion-resistant aluminium alloys. The authors also analyzed how attenuation of sound waves may affect the productivity of this technique. The authors built a model showing how the sound wave is propagating from the magnetostrictor to the cutting zone when making bore holes in the internal surface of an AlMn alloy item using concentrators of different shapes. A study was carried out that involved simulation of the sound wave propagation from the magnetostrictor to the cutting zone when making bore holes in the internal surface of an AlMn alloy item when employing the technique taken for prototype. The sound wave propagation model helps estimate the attenuation degree of the waves as they propagate. According to the model, the wave impact registered was at its highest when a tapered concentrator was used for making bore holes in items made of corrosion-resistant aluminium alloys.