LHC column-beam type welding machine can be arranged in symmetry, for 45° submerged arc welding of two seams on H-beam. Work-piece racks should be fixed on the ground among the 2 sets of LHC. The machine is equipped with seam tracker, automatic flux feeding and recovery device. Welding speed is controlled with inverter and displayed in digital. It is small in area and low in investment.
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