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作者机构:School of Mechanical and Electric EngineeringChangchun University of Science and TechnologyChangchun 130022China Changchun College of Electronic TechnologyChangchun 130114China Hsg Laser Co.Ltd.Foshan 528306China
出 版 物:《Chinese Journal of Mechanical Engineering》 (中国机械工程学报(英文版))
年 卷 期:2024年第37卷第6期
页 面:118-130页
核心收录:
学科分类:08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程(可授工学、理学学位)]
基 金:Supported by Equipment Pre-Research Foundation of China(Grant No.50923030512)
主 题:Laser cutting Nozzle structure Flow field analysis Cutting speed Section quality
摘 要:Aiming at problems such as slow cutting speed,poor cutting quality and inability to cut thick plates effectively with traditional single-layer nozzle structure,it is proposed to add an outer ring core to form a double-layer nozzle structure on the basis of the single-layer nozzle structure to improve its cutting *** three-dimensional entity of single-and double-layer nozzle is established,and the simulation model of auxiliary gas flow field is established by using N-S equation and SST k-ωturbulence model assisted by laser cutting in this *** simulation results show that under the same cutting parameters,the auxiliary gas flow rate,oxygen concentration,mass flow rate,shear force and dynamic pressure of the double-layer nozzle structure are higher than those of the single-layer nozzle *** addition,compared with the single-layer nozzle structure,the double-layer nozzle structure can effectively improve the attenuation of oxygen concentration in the direction of sheet *** nozzle structures were used to laser cutting carbon steel plates with a thickness of 20 mm in the experiment,and the experimental parameters of cutting speed were 1.2–1.6 m/*** comparison results show that the cutting speed and cutting section quality of the double-layer nozzle are better than those of the single-layer nozzle,and the results of simulation analysis are consistent with the cutting test results.