底部气流对CO<sub>2</sub>激光切割硅钢切口质量的影响

洪蕾; 米承龙; 李力钧

光学学报, 2008, 28 (3): 522, 网络出版: 2008-03-24

底部气流对CO₂激光切割硅钢切口质量的影响

Influence of Gas Flow under Workpiece in CO2 Laser Cutting Silicon Steel

论文大纲

洪蕾 ^1,*米承龙 ¹李力钧 ²

作者单位

¹ 上海海事大学机械系, 上海 200135

² 湖南大学机械系, 湖南长沙 410082

激光技术氧助激光切割侧吹气流硅钢片熔渣 laser technique laser cutting aided by oxidation reaction lateral gas flow silicon steel sheet molten slag

摘要

激光切割相对冲压及线切割工艺具有自由度大、加工效率高、不会影响铁心质量等优点,但由于残渣及切口粗糙问题一定程度上影响了激光切割硅钢片的质量和应用范围。通过采用在工件底部增设辅助侧吹喷嘴,控制熔渣流向,保证成品切割质量激光切割工艺,试验证明,合理控制工艺参量,可获得良好效果。利用有限元法进一步对工件底部气流状况进行了数值模拟,分析了流动过程中在不同的角度和流速下光斑移动和气流场变化的情况,初步确定工件底部侧吹气流以20°吹入的辅助侧吹工艺,为进一步合理控制熔渣流向获得光滑的精细切口提供了实践和理论依据。

Abstract

Compared with the traditional blanking technology such as punching and linear cutting, the laser cutting technology has many advantages. For example, it has large freedom and high working efficiency. It will not cause such problems that will affect the quality of iron core as injuries of insulation, extrusion of edge, and so on. But during the laser cutting process, the generation of dross and the rough cutting edge limit its application. A new laser cutting technology is proposed which uses an additional nozzle under the workpiece to form lateral gas flow and control the flowing direction of the slag gas. The experiments prove that glossy and dross-free kerfs are obtained by controlling the technical parameters reasonably. The gas flow under the workpiece is simulated by finite element method (FEM). The variety of pneumatic fields when the additional nozzle is in different angle and flow velocity is analyzed, and the nozzle angle of 20° is preferred, which provide experimental and academic basis for controlling the flowing direction of the slag gas and achieving glossy kerfs.

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洪蕾, 米承龙, 李力钧. 底部气流对CO₂激光切割硅钢切口质量的影响[J]. 光学学报, 2008, 28(3): 522. Hong Lei, Mi Chenglong, Li Lijun. Influence of Gas Flow under Workpiece in CO2 Laser Cutting Silicon Steel[J]. Acta Optica Sinica, 2008, 28(3): 522.

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