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采用高速摄影方法及汉诺威弧焊质量分析仪对三种长输管道用纤维素焊条的熔滴过渡、电弧参数进行了试验研究。高速摄影图片表明,纤维素焊条熔滴过渡为短路过渡、喷射过渡、爆炸过渡的混合模式;三种焊条的电流电压波形图具有明显短路特征。为了评价纤维素焊条的工艺性,对焊接过程电压信号进行了频谱分析。功率谱主分布峰描述了金属熔滴的短路过渡频次,频谱信息反映了焊接过程中电弧的稳定程度。实验结果表明,纤维素焊条电压信号的频谱分析结果能够反映焊接过程熔滴过渡形态及其稳定性,评价纤维素焊条的工艺性。
High-speed photography and Hanover arc welding quality analyzer were used to study the droplet transfer and arc parameters of three kinds of long-distance cellulose fibers. High-speed photographic images show that the droplet transition of cellulose electrode is a hybrid mode of short-circuit transition, injection transition and explosion transition. The current and voltage waveforms of the three electrodes have obvious short-circuit characteristics. In order to evaluate the manufacturability of the cellulose electrode, the voltage signal of the welding process was spectrum analyzed. The main peak of the power spectrum describes the short-circuit transition frequency of the metal droplets, and the spectrum information reflects the stability of the arc during the welding process. The experimental results show that the spectral analysis results of the voltage signal of the cellulose electrode can reflect the droplet transition morphology and stability during the welding process and evaluate the technological property of the cellulose electrode.