空气中的药芯割丝电弧切割机制  

Arc Cutting Mechanism of Flux Cored Cutting Wire in Air

作　　者：黎文航[1,2] 李泽新[1] 王俭辛[1,2] 王加友[1] LI Wenhang LI Zexin WANG Jianxin WANG Jiayou(School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China School of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 212003, China)

机构地区：[1]江苏科技大学材料科学与工程学院,江苏镇江212003 [2]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《上海交通大学学报》2016年第10期1597-1600,共4页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目(51305173);中国博士后科学基金项目(2014M550289;2015M580423;2015T80548)资助

摘　　要：为探讨空气中熔化极电弧的切割机制,采用在工件边沿切割的方法以避免工件对电弧的遮挡,采用电弧传感器和高速摄像同步采集系统对电弧切割过程中的切割电流、电弧电压和割口区图像进行采集与分析,通过改变送丝速度、电弧电压和切割速度等参数来分析切割过程的变化情况.结果表明:切割时,电弧除了在切割方向移动外,还在送丝方向做周期性的上下移动;当割丝与前方割口发生短路时,电弧由工件下方转移到工件上方;电弧在工件厚度方向的平均位置将影响切割过程的稳定性.To clarify the metal arc cutting mechanism in air, the work piece was cut at its edge to avoid the arc being blocked. An ＂arc sensor-high speed photography＂ synchronous acquisition system was estab- lished to obtain the cutting current, arc voltage and images of the cutting area. By changing the wire feed- ing speed, arc voltage, cutting speed and other parameters, the cutting process was analyzed. The results show that the arc moves up and down besides moving with the torch in the cutting direction. When there is a short circuit between the cutting wire and the front of the cutting area, the arc transfers from the bottom of the work piece to the top of the work piece. The average position of the arc in the work piece thickness direction affects the stability of the cutting process. This paper lays the foundation for further study of the underwater cutting mechanism.

关 键 词：药芯割丝 电弧切割 切割机制 高速摄像 

分 类 号：TG484[金属学及工艺—焊接]