摘 要旋转电弧窄间隙MAG焊是一种优质高效的焊接方法,因此在中厚板焊接中受到极大的重视与深入的研究。为了保证焊接质量,克服焊接工件坡口存在加工和装配误差、焊炬未对准坡口中心、焊丝弯曲、电弧偏吹等一些干扰因素影响侧壁熔深,需要对焊缝进行实时有效的焊缝跟踪,而单一的传感技术又无法实现精确的焊缝跟踪,因此有必要结合多种传感技术来进行信息融合,从而实现改善焊接上质量的目的。本课题对旋转电弧窄间隙MAG焊的电弧声音信号传感技术进行研究,通过对声音信号的采集,并结合电弧传感,进行信息融合,进一步分析旋转电弧窄间隙MAG焊的电弧声音信号,得到焊接电流变化下电弧声信号的特征,并分别从电弧声信号的时域和频域两个角度进行研究,发现了一些电弧声信号的特征和规律。86174
毕业论文关键词:旋转电弧窄间隙 MAG 焊;声音传感;电弧传感
Abstract Narrow gap MAG welding is a kind of high quality and high efficiency welding method, so it has been paid great attention and deep research in the welding of medium and thick plate。 In order to ensure the welding quality, overcome the some interference factors such as Narrow gap work piece machining and assembly errors, torch misalignment from groove center, wire bending, arc partial blow affecting the sidewall penetration is, we should need effective real-time seam tracking of weld。 But single sensing technology is unable to realize accurate seam tracking and it is necessary to apply a variety of sensor technologies to the fusion of information, so as to improve the welding quality。 The rotating arc narrow gap MAG welding arc sound signal sensing technology research, through the acquisition of the sound signal, and combined with arc sensing, information fusion, further analysis of the rotating arc narrow gap MAG welding arc sound signal, welding arc sound signal characteristics under current changes, and separately from the two angles of arc sound signal in time domain and frequency domain were carried out。 We found some of the features and laws of arc sound signal。
Key words: rotating arc narrow gap MAG welding; sound sensing; arc sensing
目录
第1章 绪论 1
1。1 课题研究背景及意义 1
1。2 国内与国外的发展基本现状 2
1。2。2 声音传感的焊缝跟踪技术国内外发展现状 3
1。3 本课题研究目的与内容 4
1。3。1 研究目的 4
1。3。2 研究内容 4
第2章 旋转电弧窄间隙MAG焊及声音传感试验装置 5
2。1 系统组成 5
2。2 窄间隙MAG焊电弧传感硬件组成 6
2。3 窄间隙MAG焊声音传感硬件组成 7
2。4 窄间隙MAG焊的电流、电压控制系统组成 8
2。5 控制柜的构造及作用 11
第3章 窄间隙MAG焊电弧声音传感特性研究 13
3。1 实验设计 13
3。2 焊接电流变化下的电弧声信号特征 14
3。2。1 电弧声信号时域特征 14
3。2。2 电弧电流与电弧声信号振铃的关系