Squeezing detection control method for consumable electrode...

Details Squeezing detection control method for consumable electrode... Squeezing detection control method for consumable electrode...

2008-02-29

2011-11-29

Paik, Sang (Department: 3742)

Electric heating

Metal heating

By arc

C219S130500

Reexamination Certificate

active

08067714

ABSTRACT:
A squeezing detection control method is provided for consumable electrode arc welding. The method includes a step of detecting a droplet squeezing phenomenon by checking that a change in a voltage or resistance between the consumable electrode and base material reaches a squeezing detection reference value, and a step of executing output control for rapidly decreasing a welding current passing through a short-circuited load when the squeezing phenomenon is detected, so that arc re-striking occurs in a state of low current. The squeezing detection reference value is set to a first value during the electrode positive polarity, and set to a second value during the electrode negative polarity. The second value is different from the absolute value of the first value, and each of the first and second values is set such that the resultant welding state is satisfactory.

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