CO_2焊熔滴短路过渡过程的分析与控制

The Analysing and Controlling of Droplet Transfer Process During CO_2 Short Circuiting Arc Welding

根据飞溅机理，对短路液桥收缩过程进行了深入分析和定量描述，指出短路液桥收缩过程规律并对液桥收缩程度进行了实时检测．在此基础上，首次提出了一种恒压与陡降复合的电源外特性，实现了对液桥收缩过程的实时控制，显著地降低了焊接飞溅。

Based on the mechanism of spatter, the contracting process of short circuitingbridge is analysed and a quantitative description is given. The rules of the contractingprocess are shown and the contracting degree is tested on real bine. On the analysingbase, a specific power source, with the composite external characteristics of permanentvoltage and sudden fall, is proposed unprecedently. It controls the bridge contractingprocess in real bine, and results in a stable short circuiting arc welding process withmuch low spatter.