Kovatchev, Georgi Determination of vibration during longitudinal milling of wood-based materials / Georgi Kovatchev, Valentin Atanasov. -- Obr., tab. -- Lit. - The study of vibrations during the operation of the cutting mechanism in a woodworking shaper is presented in the paper. Wood-based details used in the furniture manufacturing like plywood and medium-density fibreboard (MDF) were milled. The experiments were performed using the universal milling machine with lower spindle position FD-3 located in a laboratory at the Department of Woodworking Machines, University of Forestry – Sofia.Vibration velocity was measured using a specialized device model Bruel & Kjaer Vibrotest 60 at 6000 min-1 rotation frequency. The exact vibration state measurements were made in two mutually perpendicular directions (Ax and Ay). On the basis of the experiment, regression equations were developed. Determination of the influence of feed speed U (from 2m·min-1 to 10m·min-1 ) and milling area А (from 48 mm2 to 144 mm2 ) at the vibration velocity V mm·s-1 (r·m·s) was performed by conducting planned two-factor regression analysis. The vibration velocity values at the point Ax were from 1.85 mm·s-1 to 2.76 mm·s-1 , and at the point Ay were from 1.75 mm·s-1 to 2.97 mm·s-1 . The measured roughness Rz of the test specimens was from 20 μm to 157 μm. The investigation results can be used as a base for making some recommendations concerning an increase in reliability of the wood shapers as well as the accuracy and quality of their production.

In Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Zvolen : Technická univerzita vo Zvolene, 2021. -- ISSN 1336-3824. -- Vol. 63, no. 1 (2021), s. 85-92

I. Atanasov, Valentin
II. Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Vol. 63, no. 1 (2021), s. 85-92

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