Abstract: A device for arc welding with fusible wire including a device for setting the wire speed and a device for selecting a metal transfer rate type, the device for setting the wire speed being maneuverable by the hands or fingers of an operator. The device for selecting a metal transfer rate type cooperate with the device for setting the wire speed in such a way as to allow the operator to set the wire speed by maneuvering the device for setting the wire speed and to automatically select, on the basis of the wire speed setting, a metal transfer rate type.

Abstract: A device for arc welding with consumable metal wire comprising means (1) for setting a wire speed (Vf) and means (2) for selecting a type of metal transfer regime, the means (1) for setting wire speed (Vf) being manually or digitally operatable by an operator. According to the invention, the means (2) for selecting a type of metal transfer regime interact with the means (1) for setting the wire speed (Vf) so as to allow the operator to set the wire speed (Vf) by operating said means (1) for setting wire speed (Vf) and so as to select automatically, depending on said setting of the wire speed (Vf), a type of metal transfer regime.

Abstract: An arc welding process using a consumable electrode, in which welding cycles follow one after another over the course of time, each comprising an arc period and a short-circuit period in which the liquid metal establishes a short-circuit between the end of the electrode and the workpiece or workpieces. Each cycle comprises the steps of: maintaining an arc current I2 at the same time as the consumable electrode is moved towards the workpiece; reducing the current so as to reach a minimum current I1 at the start of the short-circuit; reducing the speed of the consumable wire electrode; increasing the current over the short-circuit period in order to reach a maximum value I4; and then reducing the current over the short-circuit period in order to reach a minimum value I1.