| 摘要 |
PURPOSE:To reduce a fraction defective of a wire rod, to raise a product yield, and to raise an efficiency by detecting a surface flaw of the wire rod to which drawing has been executed, grinding and removing only its flaw part, and performing a prescribed surface treatment to a flaw repaired mark part by on-line. CONSTITUTION:A wire rod 13 which has been drawn by a die 2 is brought to a flaw detection by on-line dontinuously by a surface flaw detecting machine 3, and this flaw detecting information and speed information from a free wire speed meter 5 are inputted to a control unit 12. In this unit, a position in the circumferential direction of the flaw, a length of the flaw and a depth of the flaw are calculated, its result is outputted as a grinding command to an automatic repairing device 4, and the surface flaw of the wire rod 13 is removed. Subsequently, by the information from the control unit 12, the respective treatments are performed continuously to the flaw repaired mark part by on-line by a pre-heating device 6, a zinc phosphate treating device 7, a water washing treating device 8, a lubricating treating device 9 and an infrared-ray drying furnace 10, and the wire rod is wound to a winder 11. |
