PURPOSE: To perform wire drawing in high productivity and high yield, and in an excellent operating environment by using an inexpensive lubrication undercoating agent, by performing continuously the wire drawing in a dry system and performing flaw detection and maintenance in an on-line system.
CONSTITUTION: A wire rod 1 recoiled from a payoff stand 2 is passed through a straightening machine 3 and descaled mechanically by a device 4, then the rod 1 is passed through a tank 5-1 containing lime powder of lubrication undercoating agent and is subjected to an undercoating treatment of lubrication by passing it through a press-sticking die 6-1 at need. The wire rod 1 is successively passed through a tank 5-2 containing powder of reinforcing lubrication agent such as sodium stearate, and passed through a press-sticking die 6-2, then the rod 1 is introduced to a tank 5-3 containing powder of prelubrication agent for drawing die to perform a primary drawing by a drawing die 6-3. Next, the surface flaw of the rod 1 is continuously detected in an on-line system by a flaw detector 7 to remove the surface flaw automatically in high yield by an internal wheel grinder 8 basing on the information. The wire rod 1 after mending is coiled as it is or coiled after performing a secondary drawing by a drawing die 9.
SUDOU CHIYUUZOU
HIROSHIMA TATSUO
SAKAMOTO TAKAHIDE
TOMIKAWA NORIYUKI
ASAI MASANAO
NORITAKE CO LTD