Effect of technological parameters on energetic efficiency when planar milling heat-treated oak wood

Abstract

Measuring the energy consumption and evaluating the efficiency of machining processes is necessary for their optimization and for implementation of cleaner production. The final product quality and the machining process of woodworking are of great interest. The properties of thermally modified wood make it more resistant to fungi, moulds, and ligniperdous insects than natural wood, so it is increasingly used in interior and exterior spaces. This study examined the energy demand of the milling of heat-treated oak wood (Quercus petraea) by ThermoWood® technology. The investigated technological parameters were thermal modification temperature (160 °C, 180 °C, 200 °C, and 220 °C), cutting speed (20 m × s-1, 40 m × s-1, and 60 m × s-1), feed rate (6 m × min-1, 10 m × min-1, and 15 m × min-1), and the material of the cutting tool. As the temperature of the thermal modification increased, the cutting power decreased due to a chemical degradation due to heating and reduced wood density. The lowest energy consumption was observed for the milling of wood treated at 220 °C with a cutting speed of 20 m × s-1, and a feed rate of 6 m × min-1.

Optimization of cutting power and power efficiency during particleboard helical milling

“…The heat treatment level and drying degree of the wood also affect the cutting power. Compared with the untreated wood, the heat-treated wood had a lower density, which led to a decrease in the cutting power during processing, and the cutting power gradually decreased with the increase of the thermal modification temperature [28,29]. The influence of moisture content on the energy consumption of wood milling is complex, which is related to temperature, wood density and moisture content range [30].…”

“…Energy consumption in wood processing is also related to the rake angle of the cutting tools. Experiment on the effect of tool rake angle on milling energy efficiency in oak planar milling revealed that the milling power increased with the increase of rake angle [28].…”

Study of Cutting Power and Power Efficiency during Straight-Tooth Cylindrical Milling Process of Particle Boards

“…From the previous research studies, the milling energy consumption and efficiency of machining processes for heat-treated wood has been found to be less than that for un-treated wood due to chemical degradation and reduced wood density. Additionally, the power consumption decreased as the temperature of heat treatment increased [20,21]. Normally, the specific cutting energy increases with the wood density, but decreases with the increase in moisture content [22].…”