ANALYSIS OF THE INFLUENCE OF STEAMING TEMPERATURE ON THE SURFACE ROUGHNESS OF CNC-MILLED BEECH SAPWOOD AND FALSE HEARTWOOD
Keywords:
beech wood; thermal modification; CNC milling; surface roughness; sapwood; false heartwood.Abstract
A comparative analysis of the surface roughness of false heartwood and sapwood zones of beech wood (Fagus sylvatica L.) after thermal treatment by steaming, followed by CNC milling, is presented in the paper. The samples were treated in four steaming modes (95 °C, 115 °C, 125 °C, and 135 °C) simulating industrial conditions. The milled surfaces were evaluated using the roughness parameters Ra and Rz using a Keyence VHX-7000 digital microscope. The results show that thermal treatment reduces surface roughness in both zones, with the most significant improvement observed at medium temperatures (115–125 °C). The false heartwood zone consistently exhibited lower roughness values, indicating a denser, more stable structure during milling. Statistical analysis confirmed the significant influence of the treatment mode and wood zone on surface roughness. These findings provide guidance on optimizing heat-treated beech machining parameters, thereby increasing efficiency in furniture production.
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Copyright (c) 2026 Veronika Šugárová, Lukáš Adamčík, Richard Kminiak
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