Paksoy Muhammed, Çandar Hakan, Yılmaz Necip Fazıl
Department of Mechanical Engineering, Engineering Faculty, Gaziantep University, Sehitkamil, 27310 Gaziantep, Türkiye.
Board of Trustees, Hasan Kalyoncu University, 27410 Gaziantep, Türkiye.
Materials (Basel). 2024 Jul 12;17(14):3458. doi: 10.3390/ma17143458.
This study investigates the effects of a water-guided laser on the cutting performance of AISI 1020 steel sheets of various thicknesses by comparing the results with respect to a conventional laser. For this purpose, a novel nozzle design has been devised enabling the delivery of laser beams to the workpiece conventionally as well as through water guidance. Diverging from prior literature, a fiber laser is used with a high wavelength and a laser power output of 1 kW. Experiments are conducted on steel sheets with thicknesses ranging from 1.5 mm to 3 mm using three different cutting speeds and laser power levels. Analysis focuses on assessing surface roughness, burr formation and heat effects on the cut surfaces for both conventional and waterjet-guided cutting. Surface roughness is evaluated by using a 3D profilometer and cut surfaces are examined through SEM imaging. The results showed that the waterjet-guided laser system greatly reduced surface roughness and minimized problems associated with traditional laser cutting such as kerf, dross adherence and thermal damage. The study revealed that cutting speed had a greater effect on surface roughness reduction than laser power, with the most noticeable differences occurring in thinner sheets. Furthermore, the investigation suggests that the waterjet-guided laser cutting system demonstrates superior performance relative to conventional methods, particularly in surface quality.
本研究通过将水导激光与传统激光的切割结果进行比较，来探究水导激光对不同厚度的AISI 1020钢板切割性能的影响。为此，设计了一种新颖的喷嘴设计，能够以传统方式以及通过水导将激光束输送到工件上。与先前的文献不同，本研究使用了一种高波长、输出功率为1kW的光纤激光器。使用三种不同的切割速度和激光功率水平，对厚度从1.5毫米到3毫米的钢板进行了实验。分析重点在于评估传统切割和水射流引导切割的表面粗糙度、毛刺形成以及切割表面的热效应。使用3D轮廓仪评估表面粗糙度，并通过扫描电子显微镜成像检查切割表面。结果表明，水射流引导激光系统大大降低了表面粗糙度，并将与传统激光切割相关的问题（如切口、熔渣附着和热损伤）降至最低。研究表明，切割速度对降低表面粗糙度的影响比激光功率更大，在较薄的板材中差异最为明显。此外，调查表明，水射流引导激光切割系统相对于传统方法表现出卓越的性能，尤其是在表面质量方面。
