Abstract: A machine for forming at least a metal mesh comprising longitudinal wires and transverse wires, comprising at least a welding unit provided with a plurality of welders by means of which the longitudinal wires are welded to corresponding transverse wires, each of the welders comprising at least two electrodes, respectively upper and lower, selectively movable between a first feed position, in which at least a first electrode is distant from the transverse and longitudinal wires, and a second welding position, in which both the electrodes contact and weld the wires by means of a passage of current. The welding unit is electrically fed by a three-phase type system.

Abstract: A welding head for the formation of a metal mesh includes longitudinal wires (12) and transverse wires (13), having at least a feed unit (16) able to feed step-wise a plurality of longitudinal wires (12), and a welding unit (17) by which the longitudinal wires (12) are welded to corresponding transverse wires (13). The welding unit (17) includes at least two electrodes (19,20) selectively movable between a first feed position and a second welding position. The welding head includes at least a movement member (22) to move the first electrode (19) between the first and the second position, first sensor members (25) associated with the movement member (22) and configured to detect the position of the first electrode (19) with respect to the two wires (12,13) and/or second sensor members (30,31) to detect the working pressure of the first electrode (19).

Abstract: Machine for the formation of a metal mesh obtained by attaching together a plurality of longitudinal metal wires to a plurality of transverse metal wires. The machine includes a first feed assembly to make the longitudinal wires advance step-wise, a second feed assembly to arrange one transverse wire at a time in a first preparation position, a positioning apparatus to arrange the transverse wire in a second attachment position, and a welding assembly to attach the transverse wires to the longitudinal wires. The positioning apparatus includes a loading assembly, provided with a gripping and transfer device, to locate the transverse wire in the second attachment position. The machine also includes a thrusting device to take the transverse wire from the first preparation position to a third intermediate pick-up position, near the second attachment position, wherein the transverse wire is picked up by the gripping and transfer device.

Abstract: Machine for the formation of a metal mesh obtained by attaching together a plurality of longitudinal metal wires to a plurality of transverse metal wires. The machine includes a first feed assembly to make the longitudinal wires advance step-wise, a second feed assembly to arrange one transverse wire at a time in a first preparation position, a positioning apparatus to arrange the transverse wire in a second attachment position, and a welding assembly to attach the transverse wires to the longitudinal wires. The positioning apparatus includes a loading assembly, provided with a gripping and transfer device, to locate the transverse wire in the second attachment position. The machine also includes a thrusting device to take the transverse wire from the first preparation position to a third intermediate pick-up position, near the second attachment position, wherein the transverse wire is picked up by the gripping and transfer device.

Abstract: Device and method for the automatic formation of packs of panels of electro-welded mesh. The device is arranged downstream of a production machine provided with a work plane. The device is provided with an expulsion element which arranges the panels emerging from the machine onto an accumulation plane located as an extension to the work plane of the machine, a turnover device which turns over every other panel with respect to the position in which it exits the machine, and a discharge device to discharge the panels. The device also comprises a switching device arranged downstream of the expulsion device in order to direct alternately, and substantially continuously, at least one panel either directly towards the accumulation plane or towards the turnover device.