Effect of the Interaction between Thermal Modification Temperature and Cutting Parameters on the Quality of Oak Wood

Selected parameters and their effects were analyzed relative to the surface quality of thermally modified oak wood (Quercus cerris), which was evaluated using the mean arithmetic deviation of the roughness profile (R-a) during planar milling. Each measurement was taken at various parameters of the milling process, such as cutting speed, feed rate, tool geometry, and thermal treatment of the material. The measured results were compared with results measured on thermally untreated specimens (20 degrees C). The total amount of material removal was 1 mm. These characteristics were measured using a contact profilometer. Based on the results, thermal modification did not have a statistically significant effect on the roughness. The feed rate, rake angle, and cutting speed had the most significant effects on the monitored characteristic. The lowest average roughness values were found with a rake angle of 25 degrees, feed rate of 4 m/min, and cutting speed of 40 m/s. Increasing the cutting speed led to a reduction in the average roughness, while increasing the feed rate had the opposite effect.