电阻点焊质量检测技术研究现状

电阻点焊过程由于受到各种因素的影响，熔核区域容易出现裂纹、缩孔、未熔合等缺陷，焊点质量直接影响焊接部件的使用寿命，因此对焊点的缺陷检测与质量评定非常重要。对电阻点焊原理进行概述，总结了电阻点焊质量检测技术最新研究成果及应用，分析了焊接过程参数监控方法、焊后无损检测方法的检测机理、质量评定方法及其在实际应用中的优缺点，对电阻点焊无损检测技术的发展进行了展望。有机结合现有无损检测方法，运用信号处理、人工智能、模式识别等技术，提高检测的便捷性、高效性和智能性，是未来电阻点焊质量检测技术研究的重点。

Research Status of Quality Detection Technology for Resistance Spot Welding

Due to the influence of various factors, welding defects such as cracks, shrinkage cavities and incomplete fusion are prone to occur in the nugget area during resistance spot welding process. The quality of spot welding directly affects the service life of welding components, so the defect detection and quality evaluation of spot welding are very important. In this paper, the principle of resistance spot welding is generalized, and the latest research results and applications of quality detection technology for resistance spot welding are summarized. Also, the monitoring method of welding process parameters, the detection mechanism of non-destructive testing method after welding, the quality evaluation method and its advantages and disadvantages in practical application are analyzed. In addition, the development of non-destructive testing technology for resistance spot welding is prospected. Organically combining existing non-destructive testing methods, using signal processing, artificial intelligence, pattern recognition and other technologies to improve the convenience, efficiency and intelligence of detection, are the focus of future research on quality detection technology for resistance spot welding.