Metal tube double-ring processing device

The utility model aims at overcoming the defects in the prior art; the fine processing of a head of a metal tube can be realized by a set of device; various complicated tube head shapes can be more accurately obtained by pressing; the whole device is safe and efficient. In order to achieve the aims, the metal tube double-ring processing device comprises a main clamp die arranged on an upsetting press, and a stamping die corresponding to the main clamp die, wherein the stamping die comprises a convex rack fixed on a mounting seat; a stamping die outer sleeve which is internally provided with a mandril is fixedly arranged on the convex rack; the bottom of the stamping die outer sleeve is provided with a fixing groove used for fixing the mandril; the top of the stamping die outer sleeve is provided with a molding groove used for molding the metal tube; the main clamp die is internally provided with an inserting type mold core; the metal tube to be processed is fixedly arranged in the middle of the mold core; the outer side of the main clamp die is clamped and fixed by an auxiliary clamp die. The metal tube double-ring processing device has the obvious beneficial effect that the mandril arranged in the stamping die is matched with the stamping die outer sleeve, so that the simple double-ring effect formed by once stamping can be realized.