激光—双丝复合焊接电弧等离子体温度计算及耦合机理分析

采用光纤式光谱仪, 对激光—双丝脉冲MIG复合焊接电弧等离子体辐射规律进行探讨, 结合焊接过程中的高速摄像图片探讨激光与电弧的耦合机理, 并运用Boltzmann图法计算出电弧等离子体的电子温度。结果表明, 加入激光后, 电弧的亮度提高, 辐射增强, 电弧偏向激光作用位置, 同时电弧收紧, 电弧截面减小, 电弧稳定性增强; 激光功率、焊接电流和焊丝间距对电弧等离子体温度有比较大的影响, 随着激光功率的增加、焊接电流增大和焊丝间距的减小, 电弧等离子体电子温度升高。

Abstract

The plasma radiation of laser-double wire hybrid welding was collected by using fiber spectrometer, the coupling mechanism of arc with laser was studied through high-speed photography during welding process, and the temperature of hybrid plasma was calculated by using the method of Boltzmann plot. The results indicated that with laser hybrid, luminance was enhanced; radiation intensity became stronger; arc was attracted to the laser point; cross section contracted and arc was more stable. The laser power, welding current and arc-arc distance are important factors that have great influence on electron temperature. Increase in the laser power, amplification of welding current and reduction of arc-arc distance can all result in the rise of temperature.

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郑凯, 李桓, 杨立军, 顾小燕, 高莹. 激光—双丝复合焊接电弧等离子体温度计算及耦合机理分析[J]. 光谱学与光谱分析, 2013, 33(4): 890. ZHENG Kai, LI Huan, YANG Li-jun, GU Xiao-yan, GAO Ying. Plasma Temperature Calculation and Coupling Mechanism Analysis of Laser-Double Wire Hybrid Welding[J]. Spectroscopy and Spectral Analysis, 2013, 33(4): 890.

激光—双丝复合焊接电弧等离子体温度计算及耦合机理分析

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