摘要
极性选择是焊接工艺中最为基础的参数之一,对焊接质量有着重要的影响。通过分析电弧阳极区中性粒子的电离及阴极(或阴极区)的电子发射过程,研究了各种焊接方法下,阴阳极区压降的变化情况和阴阳极的产热。结果表明,对于不同的焊接方法、不同的极性接法(直流正接或直流反接),阴阳极区的电子发射和电离方式并不相同,在特殊情况下会在阴极区形成正电场,或在阳极区形成负电场。这将导致阴阳极区的电压降不同,进而影响阴阳极的产热。在焊接实际生产中,应根据阴阳极的产热,并考虑实际的焊接要求,选择合适的极性接法。
Polar selection is one of the most important parameters of welding technology,which will influence the welding quality.Ionization behavior in anode area and electron emission of the cathode were analyzed based on arc physics theory.Voltage fall and heat generation at anode and cathode area were investigated.Results show that ionization and electron emission modes vary for different welding method and different polar selection DCEN or DCEP.Positive electric field and negative electric field can be generated at cathode and anode area in special given condition,which will influence the voltage and heat generation of cathode and anode area.So,in welding industry,polar selection DCEN or DCEP must be chosen according to heat generation in cathode/anode area and the welding purpose.
出处
《电焊机》
北大核心
2011年第6期29-31,72,共4页
Electric Welding Machine
