REGULATING METHOD, APPARATUS AND SOFTWARE FOR GAS METAL ARC WELDING WITH CONTINUOUSLY FED ELECTRODE

摘要

A welding process regulating method for gas metal arc welding with a continuously fed welding electrode comprising the arc length being represented by an arc voltage and with the melting power supplied to the electrode being regulated in response to said arc voltage in that the melting power increases in the event of a reduction in arc voltage and reduces in the event of an increase in arc voltage. During the regulation process, the arc voltage is calculated dynamically by a weld voltage, principally representing a difference in potential between a contact tube and a weld deposit, being corrected for a dynamically calculated voltage drop across the welding electrode through which the current is passing, in its extent from the outlet end of the contact tube to the end of the arc that adjoins the electrode, taking into account the value of the weld current during the passage of the welding electrode from contact tube to arc, and also taking into account the heating of the electrode and the temperature dependence of the electrode resistivity. A weld current source with means for this welding process method and a computer program for carrying out the method are also described.