| 摘要: |
| 对铝合金脉冲MIG焊过程中电弧声信号与熔滴过渡之间的相关性进行了研究.建立了焊接电弧声信号的计算机采集系统,在此基础上分别利用小波去噪、功率谱密度分析和ARMA(auto regressive and moving average,自相关滑动平均模型)双谱估计等信号处理方法对不同熔滴过渡方式下的电弧声信号进行了分析.三种方法的分析结果均表明熔滴过渡为短路过渡、大滴过渡、射滴过渡、和射流过渡时焊接电弧声具有不同的特征,证明利用电弧声能够对铝合金脉冲MIG焊过程中出现的不同熔滴过渡进行有效地区分.为铝合金脉冲MIG焊熔滴过渡稳定性实时控制和检测提供了一种有效的手段。 |
| 关键词: 铝合金脉冲MIG焊 熔滴过渡 电弧声 实时检测 |
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| 基金项目:国家自然科学基金资助项目(50675093);国家自然科学国际合作基金资助项目(50710105060);教育部春晖计划基金资助项目(Z2005-1-62011);甘肃省教育厅基金资助项目(0803-02) |
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| Correlation of arc acoustic signals and droplet transfer in aluminum pulsed MIG welding |
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SHI Yu1, HUANG Jiankang2, NIE Jing2, FAN Ding1
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1.Key Laboratory of Non-ferrous Metal Alloys and Processing of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China;2.State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China
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| Abstract: |
| The correlation between arc acoustic signals and droplet transfer in aluminum pulsed MIG welding was studied.The arc sound signals under different droplet transfer were acquired by the designed experimental system and analyzed by using the metheds of the wavelet de-noising, the power spectral density and the power spectral estimation of auto regressive and moving average.The analysis results show that the arc acoustic signals have different characters under short-circuit transfer, global transfer, projected droplet transfer and spray transfer, so the pattern of droplet transfer can be recognized by arc acoustic signals.These results have an industrial impact on controlling the stability of droplet transfer of aluminum pulsed MIG welding in real-time. |
| Key words: aluminum pulsed MIG welding droplet transfer arc acoustic signals real-time detecting |
