Nippon Steel Corporation

Og Technologies, Inc.

Ryuichi Seki

Koji Adachi

Manabu Kubota

Tatsuro Ochi

Hideo Kanisawa

Tzyy-Shuh Chang

Hsun-Hau Huang

Koji Tanabe

Kiichiro Tsuchida

Kazuomi Tomita

An inspection system for detecting flaws on a moving metal (e.g., steel) bar coordinates the operation of an eddy current testing (ECT)-based flaw detection apparatus and an imaging-based flaw detection apparatus. The ECT-based flaw detection apparatus and the imaging-based flaw detection apparatus are disposed along a movement path in a predetermined relationship with each other, for example, as a predetermined fixed offset distance therebetween. A synchronizing mechanism synchronizes the output data streams from the two flaw detection apparatuses based on the predetermined relationship, so as to align the data streams as function of the axial position on the metal bar. A processing unit is configured to process the synchronized data streams for the detection of flaws, which are then also synchronized (axial position). The synchronization permits a variety of cross-referencing operations, such a flaw verification as to the existence of flaws, as well augmenting imaging-based flaws with flaw depth information from the ECT-based apparatus.

Surface flaw detection and verification on metal bars by Eddy current testing and imaging system

The present invention relates a train of in-line continuous manufacturing equipment for producing steel wire, considered difficult with a block mill up to now, capable of efficiently carrying out controlled-rolling and slow-cooling by an effective in-line combination of controlled rolling apparatuses and slow cooling apparatuses, having a hot rolling mill for steel wire, a winder to wind the rolled steel wire into rings, bundling apparatuses to pack the wound steel wire into bundled coils and an in-line heat treatment furnace to slow-cool the steel wire bundled into coils, which are sequentially connected, and using, preferably, a block mill with an area reduction rate of 25 to 60% having at most 4 roll stands as a final finish rolling mill of the hot rolling mill.

Continuous production facilities for wire

Cold workable steel bar or wire and process

Growing community of inventors

Muroran, Japan

Ryuichi Seki