Surface roughness of thermally treated wood cut with different parameters in CNC router machine

Abstract

The effects of different machining parameters on surface roughness values of thermally treated pine, beech, and linden woods cut in a computer numerical control (CNC) router machine were examined. Wood specimens were thermally treated at 170, 190, and 210 °C for 2 h. Then, specimens were cut in the radial and tangential directions with three different spindle speeds (12000, 15000, and 18000 rpm) and three different feed rates (3000, 4000, and 6000 mm/min) using two different end mill tools (spiral and straight) on the CNC machine. The end mill type significantly affected the roughness values of the untreated and thermally treated specimens in both directions. Lower roughness values were found in the specimens (especially pine) machined with the straight end mill compared to those machined with the spiral end mill. Roughness generally decreased in the thermally treated specimens. However, thermal treatment temperature did not have a notable effect on roughness. As the spindle speed increased, the roughness values of all specimens decreased. In contrast, as the feed rate increased, the roughness values increased. Therefore, the end mill type, feed rate, and spindle speed were the most influential parameters on the roughness.

Optimization of wood machining parameters using artificial neural network in CNC router

“…Also, Figure 5 shows a regression diagram in the neural network training process of model 1 as an instance. The objective is to achieve a value as close to 1 as possible as in R 2 .…”

“…In this study, smoother surfaces were obtained in the tangential section in perpendicular to the grain direction than parallel to the grain direction. Pelit et al [2] examined the effects of SS, FR, cutting direction, and end mill type on SR values in CNC machining of thermally treated beech pine and linden woods. The specimens were cut in plain sawn and rift sawn.…”

“…Besides, the thickness of the chip and the length of the cutter mark increase in machining with high feed speeds, and roughed surfaces were obtained [1,32,33]. The roughness values increase with increasing of the FR with decreasing of the SS [2,34]. In the literature, smoother surfaces were obtained with decreasing cutting width and DoC [35,36].…”

“…Although wood is a readily machinable material, its anisotropic and heterogeneous structure makes processing much more complex. In this respect, the easy and economical processing of wood to obtain smoother surfaces and the lowest energy consumption in various machines and conditions is one of the most important factors in machining [1][2][3].…”

11th Hardwood Conference Proceedings

“…With their increase, the feed per tooth decreases, and surface irregularities also decrease (Pelit et al 2021). During milling, the amount of material that is milled at one time is reduced, reducing the load on the cutting edge.…”