Measuring and testing – Vibration – By mechanical waves
Patent
1993-05-12
1995-09-05
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73622, 73624, 73634, G01N 2926
Patent
active
054470706
DESCRIPTION:
BRIEF SUMMARY
The invention pertains to a rotor of an ultrasonic test device for rotationally symmetrical test pieces, especially tubes and bars. The rotor has at least one bore for a test probe mount. The bore holds a test probe mount, which a) can be longitudinally adjusted in the direction of the axis of the bore, b) is sealed in the bore by a gasket, and c) holds at least one test probe. In this rotor, which is anticipated in DE-U-901 0066, the test probe mounts can be angularly adjusted, thereby making it possible to detect oblique defects lying within a given angular range.
In practical situations, it was then found that oblique defects frequently occur in such a way that they are present in a positive angular range, measured relative to the axis of the test piece, and in a numerically equal, but negative angular range. The detection of these kinds of oblique defects with the previously known rotor is difficult.
The goal of the invention was to further develop the previously known rotor of the type described at the beginning in such a way that it would be possible to determine not only the types of defects that can already be detected with existing equipment, but also to simplify the detection of oblique defects that occur both in a positive angular range (measured relative to the axis of the test piece) and in a numerically equal, but negative angular range.
The oblique defects can be systematically detected in a positive angular range (relative to the axis of the test piece) by the first test probe mount of the pair, and the oblique defects in the numerically equal, but negative angular range can be detected by the second test probe mount. By adjusting the interplay of the two test probe mounts from the outside, it is possible to detect oblique defects of a desired orientation. In this connection, the equipment of the invention can be quickly adapted to the specific test objective.
The goal of the invention was to further develop the previously known rotor of the type described at the beginning in such a way that it would be possible to determine not only the types of defects that can already be detected with existing equipment, but also to perform oblique error testing in ultrasonic rotational test systems.
In accordance with the invention, starting with the rotor of the type described at the beginning, this goal is achieved by providing pairs of bores, which are arranged in staggered fashion in the direction of the axis of rotation of the rotor, and that a rotational drive is assigned to each test probe mount of a pair, which rotational drive has a common control and allows synchronous, opposing rotation of the two test probe mounts of the pair about the given axis of the bore.
In accordance with the invention, it is possible systematically to determine oblique defects that lie within a given angular range. In this connection, a minimum of one test probe of the first test probe mount of a pair is set to determine oblique defects of a first angular range, while a minimum of one test probe of the second test probe mount of the pair detects oblique defects of another angular position. Especially advantageous in this regard is a design in which the oblique defect is detected by the first test probe mount of the pair in a positive angular range (relative to the axis of the test piece), and the oblique defect is detected by the second test probe mount in the negative angular range of the same magnitude. By adjusting the interplay of the two test probe mounts from the outside, it is possible to detect oblique defects of a desired orientation. In this connection, the equipment of the invention can be quickly adapted to the specific test objective.
Oblique defects arise, for example, in the production of tubes or bars by the continuous casting or continuous drawing process, if the production process also involves rotation (torsion). The generally areal defects may also by variably inclined to their given angular position relative to the axis of the test piece. To assure reliable detection, it is proposed, in a further
REFERENCES:
patent: 3958451 (1976-05-01), Richardson
patent: 4395911 (1983-08-01), Macecek
patent: 5280724 (1994-01-01), Higo et al.
Mietzner Rudolf
Patzke Ottokar
Prause Reinhard
Finley Rose M.
Krautkramer GmbH & Co.
Williams Hezron E.
LandOfFree
Rotor of an ultrasonic test device for detection of oblique defl does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotor of an ultrasonic test device for detection of oblique defl, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotor of an ultrasonic test device for detection of oblique defl will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-466648