Waterwheel type multi-station machining equipment and air conditioner valve body machining method

The invention relates to the field of automatic machining, and particularly discloses waterwheel type multi-station machining equipment and an air conditioner valve body machining method. The waterwheel type multi-station machining equipment comprises a rack and a rotary mounting seat, wherein a machining unit is arranged on the rack; at least one machining unit comprises a rotating main shaft and an automatic tool changing module; the automatic tool changing module comprises a tool clamping assembly, a tool changing operation assembly and a middle transmission rod. The cutter clamping assembly comprises a mandrel and a plurality of external expansion pieces, and each external expansion piece comprises a locking arm; the tool changing operation assembly drives the mandrel to move axially. An operation hole which is formed in the rotating main shaft in a penetrating mode in the axial direction is formed in the rotating main shaft, one end of the operation hole corresponds to the tool clamping assembly, and the