Adapter piece welding positioning tool of cylindrical battery and adapter piece welding device

The utility model belongs to the technical field of adapter piece welding, and provides a cylindrical battery adapter piece welding positioning tool and an adapter piece welding device.The cylindrical battery adapter piece welding positioning tool comprises a first positioning seat, a second positioning seat, a first positioning rod, a second positioning rod and a second positioning rod, and the first positioning seat is provided with a first containing groove and a first limiting structure located at one end of the first containing groove; the first adapter piece positioning table comprises a first positioning surface facing the first limiting structure, the first positioning surface is provided with a positioning boss and a first welding clearance hole, and the positioning boss comprises a first center positioning boss; the first driving part is connected with the first positioning seat; and the adsorption mechanism comprises a second driving part, a rotating arm and an adsorption head, the first end of the