Multi-cambered-surface positioning vertical brake hanging seat automatic welding tool

The utility model discloses a multi-cambered-surface positioning automatic welding tool for a vertical brake hanging seat, and belongs to the technical field of auxiliary welding tools for framework components of rail transit vehicles. The device is provided with a connecting disc used for being connected with a positioner; the base is fixedly connected to the connecting disc in a vertical state; the pressing device is arranged at the edge position of the base and is used for pressing a workpiece; wherein a first cambered surface positioning block is fixedly connected to the base, and a second cambered surface positioning block and a third cambered surface positioning block are symmetrically and fixedly connected to the positions, located on the two sides of the first cambered surface positioning block, of the base, so that in the working state, the second cambered surface positioning block and the third cambered surface positioning block are located; the first arc-surface positioning block is used for positi