The invention discloses a cold heading device and process for
pipe nuts. The device comprises a
cutting-off mechanism, a feeding mechanism, a
transfer mechanism and six molds. The positions of the feeding mechanism and the
cutting-off mechanism are corresponding, and the
transfer mechanism moves and transfers materials between the feeding mechanism and the molds. The molds comprise a first mold for pre-heading chamfering, a second mold for forming rod diameters, a third mold for pre-heading head hexagonal shapes, a four mold and a fifth mold for inverted
extrusion of inner holes and fine heading of the head hexagonal shapes and a sixth mold for
punching holes. The six molds are arranged successively. According to the device and the process, expensive hexagonal rods are not needed to be used as raw materials, so that the cost is saved;
station materials are formed directly in the molds, so that the process is simple; the material usage rate is high, and compared with the prior art, the amount of raw materials required by a single
pipe nut is saved by half; the subsequent
machining process is not needed, the
pipe nut production speed is improved to be 85 nuts / minute, and the production efficiency is greatly improved.