Research on Influen e Mechanism of Nozzle Structure on Properties of Thick Carbon Steel Plate by Laser Cutting

作     者：Nan Chen Yan Shi Yan Pang Ruotao Li 

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.