发明名称 |
Method and apparatus for detecting flaws in strip |
摘要 |
A flaw detecting method and apparatus for continuously testing a strip (1) that is continuously conveyed through a liquid (6) includes features for reducing air bubble generation in a liquid. The apparatus includes a liquid, conveying rolls (7-10) for passage of the strip through the liquid, and ultrasonic testing probes (20) arranged in the liquid for testing the strip. A conveying roll (8 or 9) in contact with the liquid is fully immersed. Air bubble generation is inhibited to improve the testing reliability by at least one of: (a) shielding (16) the liquid dropping from the portion of the strip leaving the liquid; (b) reducing the dropping force of the liquid onto the liquid surface (6a) by inclining the strip; (c) installing the fully immersed conveying roll (8 or 9) at a depth of at least 5 mm in the liquid; and (d) using a carrying speed of less than about 200 m/min. Upon manufacturing steel strips, testing is carried out at the stage of the hot-rolled steel sheet, or, preferably, in the pickling equipment. <IMAGE> |
申请公布号 |
EP1008849(A3) |
申请公布日期 |
2001.11.14 |
申请号 |
EP19990309497 |
申请日期 |
1999.11.29 |
申请人 |
KAWASAKI STEEL CORPORATION |
发明人 |
TAKADA, HAJIME;SASAKI, TOSHIHIRO;IRI, MASATO;ARATANI, MAKOTO;KUGUMINATO, HIDEO;MIYAKE, HIDENORI;SHIMIZU, MASUTO;OKADA, SUSUMU;TOMURA, YASUO |
分类号 |
G01N29/11;G01N29/22;G01N29/24;G01N29/27;G01N29/28 |
主分类号 |
G01N29/11 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|