Abstract
A novel variable polarity welding power with high-frequency pulse modulation is designed by means of superimposed circuit, which can produce arc characteristics of high-frequency pulse welding in variable polarity welding process. Based on mathematic model of arc pressure and process experiment, the high-frequency pulsed current can increase arc pressure in a large scale. In the same root-mean-square welding current, the arc pressure with high-frequency (5 kHz) pulsed current increase to 2 times of the normal tungsten inert-gas welding arc, and it helpful for increasing of arc stiffness and energy density. It also provides theoretical proof for further researches on the high-frequency pulse modulated variable polarity welding.
| Original language | English |
|---|---|
| Pages (from-to) | 81-84 |
| Number of pages | 4 |
| Journal | Hanjie Xuebao/Transactions of the China Welding Institution |
| Volume | 28 |
| Issue number | 11 |
| State | Published - Nov 2007 |
Keywords
- Arc characteristics
- Arc pressure
- High-frequency pulse current welding
- Variable polarity welding
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