Part positioning mechanism for automobile part machining and positioning method of part positioning mechanism

The invention discloses a part positioning mechanism for automobile part machining and a positioning method of the part positioning mechanism, and relates to the technical field of positioning mechanisms. The device comprises a supporting assembly, two symmetrically-arranged positioning modules are installed on the inner wall of the supporting assembly, each positioning module comprises a positioning clamping plate and an air distributing pipe, an air pump is fixedly installed on the back face of each positioning clamping plate, a port of each air pump is fixedly communicated with the corresponding air distributing pipe through a connecting pipe, and an air pressure probe is installed in each connecting pipe; a plurality of pipe sets and a plurality of axial clamping bags distributed in a linear array mode are installed on the inner wall of the positioning clamping plate. According to the positioning mechanism, through the arrangement of the two positioning modules, the positioning mechanism can efficiently c