Characteristics of Magnetic Field Assisting Plasma GMAW-P
Characteristics of Magnetic Field Assisting Plasma GMAW-P
复制标题
磁场辅助等离子体GMAW-P的特点
DOI：
10.29391/2020.99.003
复制
发表时间：
2020
期刊：
影响因子：
2.2
通讯作者：
Peng Chen
中科院分区：
文献类型：
--
作者：
Yu Jiang;Wang Bo;Hongtao Zhang;P. He;Jicai Feng;B. Yu;Qichen Wang;Peng Chen
采用高速摄像和电信号同步采集系统，研究了单脉冲GMAW-P、等离子脉冲GMAW-P和等离子加磁场GMAW-P的熔滴过渡和电压-电流特性。结果表明，等离子弧和磁场对熔滴过渡过程有显著影响。在脉冲峰值阶段，等离子体电弧和气体金属电弧的间接电弧出现，造成GMAW电流分流现象。在磁场作用下，间接电弧的周期增大。在复合等离子GMAW-P焊接中，当GMAW焊接电流不超过140 A时，发生多次脉冲单滴自由过渡，且熔滴过渡周期随等离子焊接电流的增加而缩短;当GMAW焊接电流超过140 A，等离子焊接电流小于180 A时，形成喷射过渡。当等离子焊接电流增加到180 A时，熔滴过渡转变为喷射过渡。在外加磁场的等离子-GMAW-P复合焊接中，磁场对过渡时间的影响较小。当GMAW电流不超过140 A时，熔滴过渡以排斥过渡为主.当磁场电流小于3A时，脱落部位在导丝右侧。当磁场电流超过3A时，它位于导线的下方或左侧。当GMAW电流超过140 A且磁场电流小于5 A时，形成了喷射过渡，但当磁场电流为5 A时，熔滴过渡模式转变为喷射过渡。
The droplet transfer and voltage-current characteristics of gas metal arc welding (GMAW) in single-pulsed GMAW (single GMAW-P), plasma pulsed GMAW (plasma GMAW-P), and plasma-GMAW-P with a magnetic field were studied using the synchronous acquisition system of high-speed camera and electric signals. The results showed the plasma arc and magnetic field had a significant effect on the droplet transfer process. The indirect arc of the plasma and gas metal arc emerged in the pulse peak phase causing a shunt phenomenon of the GMAW current. The period of the indirect arc was increased under the action of the magnetic field. In hybrid plasma GMAW-P, when the GMAW current did not exceed 140 A, several pulsed one-drop free transfers occurred and the droplet transfer period decreased with the increase in the plasma welding current; when the GMAW current exceeded 140 A, and the plasma welding current was less than 180 A, spray transfer was formed. The droplet transfer transformed into a projected transfer when the plasma welding current increased to 180 A. In plasma-GMAW-P hybrid welding with a magnetic field, the magnetic field had a slight effect on the transfer period. When the GMAW current did not exceed 140 A, the droplet transfer was mainly repelled transfer. The detaching location was on the right side of the wire when the magnetic field current was less than 3 A. When the magnetic field current exceeded 3 A, it was below or on the left side of the wire. When the GMAW current exceeded 140 A and the magnetic field current was less than 5 A, spray transfer was formed, but the droplet transfer mode transformed into a projected transfer with a magnetic field current of 5 A.