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变极性TIG焊微电流短路引弧技术研究
姚瑶1, 姚河清2
作者单位
姚瑶1, 姚河清2  
摘要:
基于变极性TIG焊电弧的特点,在作者研发的双芯双逆变变极性TIG焊电源的基础上,设计出了一种针对变极性TIG焊的微电流短路引弧方式,将整个引弧过程分为:短路阶段、维弧阶段和电流缓升阶段。可以有效的解决变极性TIG焊在短路引弧时容易出现的钨极烧损、电流过冲等问题。并针对不同输出电源类型,不同被焊材料,进行了微电流引弧试验。试验证明:DCEN,DCEP,脉冲输出时均能实现短路电流为1~2 A的微电流稳定引弧,未出现明显的钨极烧损,引弧成功率高并且没有出现熄弧的现象。
关键词:  短路引弧  微电流  钨极烧损
DOI:
分类号:
基金项目:
Research of tiny current short circuit arc ignition technology for variable polarity TIG welding
Yao Yao1, Yao Heqing2
Abstract:
Based the characteristics of variable polarity TIG welding, founded on the double-chip double-inverter system which researched by writer, a tiny current short arc ignition with three stages was designed, the three stages are short stage, maintain stage and current slow rising stage. The problems of tungsten weariness,current rushing etc which appears easily during short arc ignition can be solved effectively. And tiny current arc ignition experiment was carry out based on different styles of current source and welded materials. The experiments proved: the arc ignition is stable when the current is 1-2 A with the strategy of the tiny current arc ignition, as the different sources of DCEN, DCEP and pulse, without any obvious tungsten weariness and arc extinguish,and the arc ignition success rate is quite high.
Key words:  short arc ignition  tiny current  tungsten weariness

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