PURPOSE: To increase the quality of a weld zone by setting the mean value of welding current ≥ critical current, further, by using the pulse current in the specified frequency and by making the minimum value of the waveheight thereof not exceeding the critical current value.
CONSTITUTION: The mean value Iav of welding current is set ≥ critical current value Ic in the DC arc welding which uses an inert shielding gas. In this case, the droplet is transferred while being divided in the welding ≥ the critical current value Ic. Moreover, the periodical pulse current in 150W1000Hz frequency is used as the welding current and the minimum value of the waveheight value thereof is taken out exceeding the critical current value Ic. In this way the transfer times of the droplet is increased and the droplet can be divided with its mean diameter becoming smaller as well. Moreover, the melting of the body to be welded is sufficiently secured due to the pulse frequency range being regulated. Consequently the quality of the weld zone is increased.
OGASAWARA SUSUMU
KONDO TAKAO
| JPS50105527A | 1975-08-20 |
| GB975412A | 1964-11-18 |
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