Automated Devices for the Testing of Mill Rolls
| Autor: | Ya. Yu. Samedov, V. G. Shcherbinskii, S. A. Artem'ev |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Engineering
business.industry Mechanical Engineering Acoustics Ultrasonic testing Shell (structure) Structural engineering Welding Condensed Matter Physics Flash memory law.invention Mechanism (engineering) Transducer Mechanics of Materials law Head (vessel) General Materials Science business Gas compressor |
| Zdroj: | Russian Journal of Nondestructive Testing. 40:361-367 |
| ISSN: | 1061-8309 |
| DOI: | 10.1023/b:runt.0000049843.87826.fe |
| Popis: | Multichannel “Валок”-type devices developed at TsNIITMASh for the automated ultrasonic inspection of cylindrical objects, such as mill rolls, shafts of turbines and compressor units, circular welded joints of thick-walled shell rings, etc., are described. These devices feature from two to eight acoustoelectronic channels. Acoustic contact occurs through industrial water. The testing is performed under workshop conditions; the object being inspected is rotated by a turning lathe or any other handling mechanism. Sonication is simultaneously performed by piezoelectric transducers (PETs) with input angles of 0, 40, 50, 60, and 70° and also by surface and head waves in order to reveal surface and subsurface flaws. A wide-span eddy-current transducer of special design is also used for this purpose. All data are stored in flash memory and retrieved on a PC located in an office. The inspection results are displayed as C- and B-type scanning defectograms. Moreover, it is possible to obtain an isometric image of flaw zones. “ВАЛОК”-type devices have been used for over one and a half years in two workshops at OAO Severstal'. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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