Axle housing repair welding unit

The utility model discloses an axle housing repair welding unit, belongs to the technical field of axle housing tool clamps, solves the problem that the axle housing repair welding unit cannot adapt to fixation of welded axle housings with different sizes, and provides the axle housing repair welding unit which comprises a clamp bottom plate, a vertical centering clamping unit is arranged in the middle of the clamp bottom plate, and a clamping unit is arranged in the middle of the clamp bottom plate. The vertical centering and clamping unit comprises a powerful pressing air cylinder and a lifting assembly used for adjusting the vertical height of the powerful pressing air cylinder, and further comprises a horizontal centering and clamping unit arranged in the middle of the clamp bottom plate, an end shaft clamping unit used for fixing the end of a shaft piece and an end shaft clamping unit used for fixing the end of the shaft piece. The vertical centering clamping unit is designed to clamp an axle housing wor