So, developed methodology and algorithm of formation of images of the technological process events in ASF on basis of information about shape of the arc voltage
signal, processed with application of wavelet-analysis, allowed obtaining images that characterized dynamics of development of the events.
The arc voltage
increases with the decrease of the current from the peak value and finally, the arc discharge extinguishes.
The arc gas is controlled by means of a mechanical compensation system to give a steady arc voltage
The design rapidly raises the arc voltage
, thus reducing the current to zero, which in turn extinguishes the arc.
Unlike stick-electrode welding where the critical variables are controlled by the operator, semiautomatic processes control wire-feed speed (deposition rate) and arc voltage
, and help to control travel speed.
Automatic Integrated ARC Voltage
Torch Height Control
The interaction between the arc and the laser plume is determined by the arc voltage
from the keyhole and the location of the molten pool, i.
For welding head position control we use an acquisition system for arc voltage
values from welding process.
At arc current 200-1000 A arc voltage
equals 280-400 V [5, 9-11].
The technical approach modeled the details of the arc process as comprising the following nine unique sets of variables: peak current, base current, rise time, falling time, wire feed speed, arc voltage
, waveform response time, pulse mode, and pulse frequency.
The unit can now be supplied with an arc voltage
control module that allows it to be used with the new P16M tube to tubesheet weld head.
For example, a semiautomatic TIG process requires that an operator know consumable feed rates, oscillation, amperage, arc voltage
, and shield gas flow rate.