Title:
圧延ロールのクラック探傷方法
Document Type and Number:
Japanese Patent JP3551739
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enhance the durability of an apparatus which flaw-detects a crack on a sleeve-type rolled roll such as high-speed steel or the like, to make a facility simple and low-cost and to increase the flaw detecting accuracy of the crack. SOLUTION: A crack on the surface of a sleeve-type rolled roll 3L which is built in a rolling mill is flaw-detected. At this time, when the crack is flaw- detected, an eddy-current flaw detecting sensor 11 is advanced from its retreat position by using an air cylinder 16 so as to be brought close to the surface of the sleeve-type rolled roll 3L. The crack is flaw-detected in a state that the interval between the eddy-current flaw detecting sensor 11 and the surface of the roll 3L is kept constant by an interval holding roller 18. After its flaw detection is finished, the eddy-current flaw detecting sensor 11 is retreated from its flaw detecting position by the air cylinder 16. Its flaw detecting position is set in an unrolled part in which the S/N ratio on the surface of the sleeve- type rolled roll 3L is high and in which the crack is flaw-detected and judged surely.
More Like This:
Inventors:
Tsuyoshi Sasaki
Jun Sugimoto
Ichiro Yamamoto
Toshiro Taniguchi
Jun Sugimoto
Ichiro Yamamoto
Toshiro Taniguchi
Application Number:
JP35284297A
Publication Date:
August 11, 2004
Filing Date:
December 22, 1997
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
G01N27/90; B21B38/00; B21C51/00; (IPC1-7): G01N27/90; B21C51/00
Domestic Patent References:
| JP1167658U | ||||
| JP4040358A | ||||
| JP7299589A | ||||
| JP9080030A | ||||
| JP52096590A | ||||
| JP55128304A | ||||
| JP57090153A | ||||
| JP57204451A | ||||
| JP58079256A | ||||
| JP60252255A | ||||
| JP61023962A |
Attorney, Agent or Firm:
Satoshi Kumon
Kumon enjoyment
Kumon enjoyment