Focusing optical fiber laser welding head

The utility model discloses a focus-adjustable optical fiber laser welding head, which relates to the welding field and comprises a base, two groups of fixing frames are mounted at the top of the base, a moving frame is mounted between the two groups of fixing frames, a welding head is arranged below the moving frame, a fixing plate is arranged in the base, and the fixing plate is fixed on the base. An adjusting rod is installed on one side of the fixing plate through a fixing piece, an adjusting rod is arranged on one side of the fixing piece, a moving rod is arranged at the end, away from the fixing piece, of the adjusting rod, a rotating rod is arranged in the moving rod, the distance between the two focusing blocks is adjusted by rotating an adjusting nut, and therefore the distance between the lenses is adjusted. The focusing effect is achieved, the density of light beams output by the welding head is changed, the impact of the light beams on a welding point is changed, the rotating disc is rotated to dr