Eddy Current Surface-defect On-Line Detection Device for Hot Wire Rod

摘要

The present invention is to quench the surface of the hot wires during transport to an apparatus and method for performing eddy-current flaw detection by the temperature of the surface defects of said wire rods of a magnetic transformation point or less of the pre-existing online. The present invention, cooling means for cooling a surface portion of the hot wire being transported; Are spaced apart by a predetermined distance (L1) in the transport direction of the wire material from the cooling means, temperature detecting means for detecting the surface temperature of the wire; Control means for the surface temperature (T1) detected by the temperature detecting means 50 is high, the output of the eddy current flaw detection start signal than the magnetic transformation point (T2) of the wire; Are spaced apart by a predetermined distance (L2) in the transport direction of the wire material from the cooling means, the surface of when the eddy-current flaw detection start signal received from said control means temperatures below generating an eddy current on the surface of the wire and the magnetic transformation point (T2) signal detection means for detecting a surface defect signal by detecting a change in the eddy current caused by the defect; And a signal processing means to determine the surface defects in the hot-wire by analyzing the detected surface defect signal. In accordance with the present invention, confirmed that the surface defect states of the pre-existing products in real-time quality control in real-time made possible to prevent a large amount of quality defect generation of, and continuous, periodic scratched flaw, overlap the defect and scan accurately detect kaepseong defect can do. ; Hot, wire, defects, eddy current, inspection, online, cool, self-transformation, over-wrap, seukaep