Positioning device for interference assembly of shell and inner barrel

The utility model discloses a positioning device for interference assembly of a shell and an inner barrel. The device comprises a base and a guide plate, three supporting stand columns are fixedly arranged on the base. The three supporting stand columns are distributed in a semi-arc mode. Supporting cross rods are arranged between the supporting stand columns on the two sides and the supporting stand column in the middle respectively. An opening for the shell to pass through is reserved between the supporting stand columns on the two sides; the upper ends of the three supporting stand columnsare fixedly connected with the guide plate. Wherein a positioning boss is arranged on the base, a positioning groove with an opening is formed in the positioning boss and is used for placing a shell,the opening end of the positioning groove extends to the edge of the positioning boss, a guide hole is formed in the guide plate and is used for inserting an inner cylinder, and the guide hole and thepositioning groove are loc