GB1274236A - Mesh welding machine - Google Patents

Abstract

1,274,236. Welding by pressure. H. A. SCHLATTER A.G. 10 June, 1969 [24 June, 1968], No. 29449/69. Heading B3R. A machine for welding wire mesh comprises a number of pairs of welding electrodes 2, 3, the upper electrodes being movable from an inoperative to a welding position, a feeding device for longitudinal wires 5 arranged upstream of the electrodes and comprising pairs of vertical clamps 6 which make a feed stroke while the electrodes are open and a return stroke, the jaws clamping the wires 5 at the end of the return stroke when the electrodes are closed and holding means 15 for further longitudinal wires 14 above the feeding device the holding means including wire guides opening into the gaps between the clamps 6. The lower electrode 2 of each pair is fixed to the base 1 and the upper electrode is movable by device 4. The longitudinal wire feeding device comprises pairs of vertically grooved clamping pins 6 with conical tops carried on a slide 7 movable in guide rails 8 by crank-shafts 9 and connecting rods 10. The rails are pivoted to the base at 11 and are tiltable by a lifting means 12 from the position shown, which is adjustable by a device 13, to an upper raised position. Above the feeding device are holders 15 for fresh longitudinal wires 14, each holder having an insert open funnel 17, release means 16 and a stop 18. In operation with the parts in the positions shown the electrodes 3 are lowered on to an inserted cross wire 19 to effect welding, the clamps 6 open and the slides 7 are retracted to the position 7<SP>1</SP>. The clamps then close, the upper electrodes are withdrawn, the lifting means 12 raise the front ends of the rails 8 to lift the wires 5 off the electrodes 2 and the slides 7 make a feeding stroke. The new longitudinal wires 14 are meanwhile fed into the holders 15 and after the wires 5 are exhausted and with the slides 7 retracted the new wires 14 are released to drop into the clamps 6. The part 20 which carries the electrodes and feed devices may be pivoted about a vertical axis so that angled mesh may be produced. The mesh may alternatively be circular with the cross wires radially thereof. This is produced by making the length of the feedstroke on the sides of the slide 7 variable and using a longer stroke on one side than the other. To compensate for shrinkage or to produce curved mesh the lifting means 12 is adjusted by the means 13 so that the clamps press the longitudinal wires below the level of the electrodes 2. The feeding device may comprise a member between the electrodes and clamps, having guide holes for the longitudinal wires.