Arc processing control unit for controlling the arc welding flow strength for pulse welding using a protective gas ; Process of pulse welding using such process control

摘要

Electric arc process control unit (204) for an electric arc welding device (200) comprises a melting electrode (203) for welding under protective gas, where the electric arc process control unit is adapted for controlling the electric arc current such that a pulse welding process is performed. The pulse welding process comprises at least one pulse current phase, in which the electric arc current intensity is at least temporarily greater than the critical current intensity and a basic current phase, in which the electric arc current intensity lies in a base current intensity. Electric arc process control unit (204) for an electric arc welding device (200), comprises a melting electrode (203) for welding under protective gas, where the electric arc process control unit is adapted for controlling the electric arc current such that a pulse welding process is performed. The pulse welding process comprises at least one pulse current phase, in which the electric arc current intensity is at least temporarily greater than the critical current intensity and a basic current phase, in which the electric arc current intensity lies in a base current intensity. The electric arc process control unit is arranged to control the electric arc current intensity such that a maximum current intensity is reached during the pulse current phase, where the maximum current intensity is at least 500 A, which is maintained for a not > 0.5 m seconds. The increase in the electric arc current intensity starting from the base current to the maximum current intensity, is carried out with a dynamic of at least 900 A/m seconds. The electric arc process control unit is associated with a short circuit detection unit (208) for detecting a short circuit between the melting electrode and workpiece to be processed. The electric arc process control unit is adapted to initiate the pulsed current phase based on a detected short circuit starting from the base current phase. An independent claim is also included for carrying out the pulse welding under protective gas with the above electric arc welding device, where the pulse current phase is initiated depending on the detected short circuit, starting from the base current phase.