| 摘要 |
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).
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