Positioning device for interference fit of outer shell and inner barrel

The invention discloses a positioning device for interference fit of an outer shell and an inner barrel. The positioning device comprises a base and a guide plate, wherein 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 column in the middle and thesupporting stand columns on the two sides; an opening for the outer shell to pass through is reserved between the supporting stand columns on the two sides; the upper ends of the three supporting stand columns are fixedly connected with the guide plate; a positioning boss is arranged on the base, a positioning groove with an opening is formed in the positioning boss and is used for accommodatingthe outer shell, the opening end of the positioning groove extends to the edge of the positioning boss; and a guide hole is formed in the guide plate and is used for being inserted by the inner barrel, and the guide hole and t