| 分流条件下不锈钢交流点焊电流波形的频谱特征与熔核直径的关系 |
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| 引用本文： | 马铁军,杨思乾,李京龙,万晓慧.分流条件下不锈钢交流点焊电流波形的频谱特征与熔核直径的关系[J].航空制造技术,2007(2):88-90. |
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| 作者姓名： | 马铁军 杨思乾 李京龙 万晓慧 |
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| 作者单位： | 西北工业大学 |
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| 摘 要： | 通过对分流条件下不锈钢点焊焊接电流波形进行快速傅立叶变换(FFT),获得了焊接电流波形的幅频图,并将熔核直径与对应的幅频进行了对比分析,发现了一次及三次电流谐波幅值与熔核直径成线性反比关系.利用这一规律,可方便地实现点焊熔核直径的实时无损检测.
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| 关 键 词： | 不锈钢 点焊 熔核直径 电流频谱 |
Correlation Between Spectrum Characteristics of Current Waveform and Nugget Diameter in AC Spot Welding of Stainless Steel Under the Condition of Shunt |
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| Ma Tiejun Yang Siqian Li Jinglong et al.Correlation Between Spectrum Characteristics of Current Waveform and Nugget Diameter in AC Spot Welding of Stainless Steel Under the Condition of Shunt[J].Aeronautical Manufacturing Technology,2007(2):88-90. |
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| Authors: | Ma Tiejun Yang Siqian Li Jinglong |
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| Institution: | Ma Tiejun Yang Siqian Li Jinglong et al |
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| Abstract: | By Fast Fourier Transform (FFT) of the spot welding current waveform of stainless steel under the condition of shunt, the amplitude-frequency chart of welding current waveform is obtained. And by analyzing the correlation of nugget diameter-to-corresponding amplitude-frequency, it is found that the current amplitude values of the first harmonic and the third harmonic are inversely proportional to the nugget diameter linearly. By utilizing this regularity, the real-time nondestructive test of nugget diameter in spot welding can be realized conveniently. |
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| Keywords: | Stainless steel Spot welding Nugget diameter Current spectrum |
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