Patent AU-2017374521-A1 (AU)
Title: Mesh welding machine and method for producing wire meshes
Inventor: TREMMEL ROBERT
IPC: B23K11/00
Filed: 2017-10-04
Abstract: The invention relates to a method for producing elongated wire meshes from a horizontal set of parallel longitudinal wires which are welded to transverse wires running at a right angle to same at the crossing points of the longitudinal and the transverse wires, wherein the set of longitudinal wires is moved in the longitudinal direction continuously at a constant speed and the transverse wires are guided in sequence behind one another towards the longitudinal wires above and optionally below the moved set, and these are brought into contact with same in the correct position and corresponding to the distribution of the transverse wires, as well as being welded to the transverse wires at the crossing points of the mesh by means of electrodes and cooperating counter electrodes according to the electrical resistance methods, while the electrodes and the counter electrodes are pressed against one another by their welding surfaces with the crossing points arranged in between. In this way, the upper electrodes (12) are moved from an upper position downwards towards the crossing points to be formed resting on the lower counter electrodes (13), until they reach a lower first position of the commencing welding directly after the contacting of the respective transverse wire (4) or both respective transverse wires (4) on the longitudinal wires; thereafter the upper electrodes (12) travel together with the lower counter electrodes (13), maintaining contact pressure with the mesh, synchronously in the longitudinal direction into a position of the terminating welding at the same height level and at the rear in the flow direction; after which the electrodes (12) and the counter electrodes (13) travel together back into the former position thereof in relation to the longitudinal direction, while the upper electrodes (12) are moved by themselves back into the upper position thereof, and finally moved back down into the first lower position of the commencing welding in contact with the crossing points of the or the two following transverse wire/s (4). The device suitable for this method provides a feed device for the moving of the set of longitudinal wires on a stationary outer frame (1), as well as a withdrawal device (6) for withdrawing wire for the transverse wires (4) from a reel (5) and for supplying this wire to a transfer device (6) running transverse to the set of longitudinal wires above or below same. From there, the transverse wires (4) can be guided towards the longitudinal wires behind one another in sequence and brought and placed in contact with same in the correct position and corresponding to the distribution of the transverse wires (4). In addition, the electrodes (12) and counter electrodes (13) are provided for pressing their welding surfaces against one another with the crossing points of the transverse (4) and longitudinal wires arranged in between, and the upper electrodes (12) and the lower counter electrodes (13) are arranged on a frame (14), which can be periodically moved back and forth horizontally in the longitudinal direction, and the upper electrodes (12) are mounted on the moveable frame (14) such that they can be moved from an upper position, downwards towards the crossing points resting on the lower counter electrodes (13), and then back up again.