Tungsten filament welding device

The invention relates to the technical field of welding, and discloses a tungsten filament welding device which comprises a bottom plate, a power supply device and a controller are arranged on the bottom plate, the tungsten filament welding device further comprises a butt joint component, the butt joint component is used for splicing a tungsten filament and a tungsten needle, the butt joint component comprises a rotating disc, a limiting assembly, a male die and a female die, and a plurality of positioning blocks are arranged on the rotating disc. According to the tungsten wire bending forming device, the convex mold and the concave mold are close to each other to extrude a tungsten wire for bending forming, the concave mold can convey a tungsten needle to a welding position, compared with manual adjustment of the position of the tungsten needle of the tungsten wire, the tungsten needle makes contact with the tungsten wire through movement of the concave mold, the concave mold is provided with a material groo