PURPOSE: To realize short time descaling of a cold metallic wire rod and high wire drawing of wire drawing executed continuously thereafter.
CONSTITUTION: Scale is eliminated by allowing a water jet of 1000-10000Kg/cm2 pressure to come into collision with a wire rod 1 on which scale is generated due to oxidation of the surface, and subsequently, wire drawing is executed by supplying a wet lubricant converted to extra high pressure between dies from the outside. In this case, a ratio 1/d of the diameter (d) of water jet injection nozzle at the time of descaling and a distance 1 extending from the nozzle tip to the wire rod is set to 100-800. Also, wire drawing is executed by supplying a dry lubricant, and an extra high pressure wet lubricant to a first stage of a multistage wire drawing die, and a second stage and thereafter, respectively. In such a way, environmental pollution at the time of descaling and wire drawing of a cold metallic wire rod is prevented, the work environmental improvement is attained, and simultaneously, short time descaling and high speed wire drawing can be executed, and the quality improvement and the productivity improvement can be realized.
NISHIDA AKIRA
HISASUE OSAMU
