双丝三弧焊焊接规范与焊缝成形相关性分析
毕业论文关键词：双丝；三电弧；M 电弧; 高熔敷率
Abstract In recent years, the situation of global manufacturing industry becomes increasinglyserious, and also the competition becomes more and more fierce. In order to improve thecompetitiveness of their products, every company is trying to find an advanced technique,which can greatly reduce the cost of production and increase the efficiency of production.As an important link in industrial production, improving the efficiency of arc weldingtechnology has played an important role in increasing the gross production efficiency.Therefore, the high efficiency and energy saving arc welding method has become a hotspot of the study on the technology of welding.In the Tri-Arc DE welding processing experiments，by changing the middle arccurrent and power source frequency,the result indicates that welding splash rateincreaseswith the middle arc current increases,and when the power source frequency changes from100Hz to 250Hz,the welding splash rate increases with increasing frequency.Byintroducing the high-speed camera and waveform acquisition system,arc shape and droplettransfer behavior during welding process has been acquired and explored,according toanalysis，the mechanism of the influence how the middle arc current and power sourcefrequency affect the welding splash was obtained.Finally,the investigation has been carried aiming at explore different processingparameter of Tri-Arc DE flux-cored plate cladding experiments.By measuring the hardnessof cladding layer and microstructure analyzed,the results show that the weld penetrationdepth was smaller in higher middle arc current,and the base material has a higher dilutionrate.The second phase distributed uniformly, which enhanced the performance of claddinglayer.
Keywords：double electrode；Tri-Arc；welding splash rate; efficiency-energy
目录
第一章绪论..1
1.1引言.1
1.2双丝焊研究现状.1
1.2.1双丝MIG焊的工艺特点..1
1.2.2双丝脉冲MIG焊的发展现状2
1.3双丝三弧焊..4
1.3.1双丝及多弧焊特点.4
1.3.2双丝三弧焊概述5
1.4课题背景及研究内容..5
1.4.1课题的研究背景..5
1.4.2本课题主要研究内容6
第二章Tri-Arc实验原理及试验系统搭建..8
2.1Tri-Arc实验原理.8
2.2实验方法10
2.2.1焊接工艺实验..10
2.2.2焊缝性能检测实验.10
2.3本章小结11
第三章Tri-Arc工艺参数对焊缝成形的影响.12
3.1Tri-ArcM弧电流对焊缝成形的影响.12
3.1.1M弧对母材热输入功率控制的理论分析12
3.1.2M弧电流大小对焊缝熔深的影响12
3.1.3M弧电流大小对焊接飞溅的影响15
3.2脉冲频率对焊缝成形的影响18