The utility model provides a thin-walled tube riveting outer
diameter deformation mould, which relates to the technical field of moulds, and comprises an upper mould, a lower mould and a middle mould, a movable groove is arranged in the upper mould, two convex concave moulds communicated with the movable groove are arranged on the upper mould, an interlayer is arranged between the lower mould and the upper mould, a convex mould is arranged on the lower mould, and the middle mould is arranged on the lower mould. The male die is located in the female die, an annular groove communicated with the interlayer is formed by the outer wall of the male die and the inner wall of the female die, the middle die is installed in the movable groove in a sliding mode, a pressing column is installed on the middle die, and the space of the annular groove is reduced through
extrusion of the pressing column. The thin-walled tube on an object is formed through press fit between the upper die and the lower die, two processes of
welding and
polishing of press fit are avoided, the position of the thin-walled tube during press fit can accurately correspond to the installation position, the situation that the positions of the thin-walled tube are not uniform due to
welding, and the positions are not corresponding is avoided, and the production efficiency is improved. Meanwhile, the thin-walled
pipe can be flattened through the die, and the flattening effect is achieved.