Repair welding equipment and repair welding method for steam turbine casting material

The invention relates to the technical field of welding equipment, in particular to steam turbine casting material repair welding equipment and a repair welding method.The steam turbine casting material repair welding equipment comprises a repair welding table, a multi-axis linkage frame is arranged at the top of the repair welding table, and the multi-axis linkage frame comprises two longitudinally-installed first linkage shafts and a second linkage shaft transversely installed at the tops of the first linkage shafts; a first linkage shaft is arranged on one side of the first linkage shaft, a second linkage shaft can be driven by the first linkage shaft to move longitudinally, a third linkage shaft is arranged on one side of the second linkage shaft, the third linkage shaft can be driven by the second linkage shaft to move longitudinally, and the third linkage shaft comprises a mounting seat. And in combination with accurate control of the mechanical arm and the multi-axis linkage mechanism, accurate reachin