การศึกษาผลกระทบของพารามิเตอร์การตัดด้วยเลเซอร์ CO2 ต่อความกว้างรอยตัดบนวัสดุ PMMA โดยการออกแบบการทดลองแบบ Box-Behnken Design ร่วมกับวิธีพื้นผิวตอบสนอง

CO2 laser cutting is widely used for polymer processing applications because it provides high precision and flexibility. However, the difference in kerf width between the top and bottom surfaces remains an important factor affecting the quality of the workpiece. This research focuses on investigating the effects of laser power, cutting speed, and focal distance in cutting PMMA with a CO2 laser, which affect the kerf width, in order to determine the most suitable cutting conditions. The experimental design in this research employed the Box–Behnken Design (BBD) and Response Surface Methodology (RSM), and the results were analyzed using statistical techniques. The experimental results showed that laser power and cutting speed were the main factors that affected kerf width. The kerf widths of the top kerf (TK) and bottom kerf (BK) tended to decrease as cutting speed increased, while higher laser power caused the kerf widths of TK and BK to increase. In addition, a high focal distance resulted in higher kerf widths of TK and BK. The response surface modeling indicated a clear interaction between laser power and cutting speed, which significantly affected kerf width. The findings of this research can serve as a guideline for selecting appropriate cutting parameters to improve the cutting quality of PMMA workpieces, and they can be further applied at the industrial level in the future.