摘要
GMAW焊接方法在工业中应用范围广泛,但GMAW焊接中短路过渡存在飞溅问题。针对与这些问题已经有很多方法解决,如:在回路中串入电感、电流波形控制、表面张力过渡、冷金属过渡等。以上各种改善短路过渡飞溅的方法都能在一定的使用范围内改善短路过渡飞溅问题,但也存在着生产效率低、熔深浅、焊缝成形不好等局限性。将激光热源引入到短路过渡方法中,激光-电弧复合热源焊接在保证焊接稳定性的同时也提高了焊接速度,改善焊缝成形,很大程度上扩大了短路过渡的应用范围。通过SFBT、PIT方法和自由边界模型的VOF方法,对GMAW焊接熔滴过渡理论进行不断深入的研究。
The GMAW welding process is widely applied in industry.The spatter is the most serious problem in the short circuiting transfer. There are a number of solutions for this problem including installation of inductances inside the circuit,current waveform control,surface tension transfer (STT),cold metal transfer (CMT) and so on.The above method methods can improve the short circuiting transfer and restrain the spatter in a certain extent.However,its production efficiency is low and weld surface appearance is not good.The combination of laser and GMAW with short circuiting transfer can realize the stable metal transfer process and reduce the spatter.It also increases the welding speed and improves the weld surface appearance.Through the method of SFBT,PIT and the free boundary model of VOF method,the studies on metal transfer theory of GMAW are being studied further.
出处
《焊接》
北大核心
2009年第3期53-56,共4页
Welding & Joining
