Effect of pilot arc on arc properties of variable polarity plasma arc

被引：0

作者：

Han, Yongquan ^{[1
]}

Chen, Shujun ^{[2
]}

Yin, Shuyan ^{[2
]}

Du, Maohua ^{[1
]}

机构：

[1] College of Materials Science and Engineering, Inner Mongolia University of Technology

[2] College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology

来源：

Jixie Gongcheng Xuebao/Chinese Journal of Mechanical Engineering | 2008年 / 44卷 / 06期

关键词：

Arc force; Arc shape; Variable polarity plasma arc welding;

D O I：

10.3901/jme.2008.06.183

中图分类号：

学科分类号：

摘要：

Variable polarity plasma arc (VPPA) welding has shown its unique advantages in the welding of thick aluminum alloy plate. Pilot arc and its power source have great influences on arc shape, mechanical properties and static characteristic of arc in variable polarity plasma arc. By means of high-speed photograph, pressure sensor and signal detection system based on industrial computer, the rule of influences of pilot arc on arc shape, arc force and welding process are systematically analyzed. It is found that during the reversed polarity period of VPPA, the arc force is decreasing due to the shunting action of power source of pilot arc, which can easily cause such phenomena as double arc and decrease of arc voltage. The experimental results have important theoretical guiding significance to the stability of plasma welding process and to the welding process control.

引用

页码：183 / 186

页数：3

共 6 条

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