DE3633556A1 - Device for non destructively testing components made of fibre-reinforced composite materials and other materials having strong ultrasound scattering for very small defects - Google Patents
Device for non destructively testing components made of fibre-reinforced composite materials and other materials having strong ultrasound scattering for very small defectsInfo
- Publication number
- DE3633556A1 DE3633556A1 DE19863633556 DE3633556A DE3633556A1 DE 3633556 A1 DE3633556 A1 DE 3633556A1 DE 19863633556 DE19863633556 DE 19863633556 DE 3633556 A DE3633556 A DE 3633556A DE 3633556 A1 DE3633556 A1 DE 3633556A1
- Authority
- DE
- Germany
- Prior art keywords
- materials
- small defects
- test head
- fibre
- components made
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0231—Composite or layered materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/048—Transmission, i.e. analysed material between transmitter and receiver
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Prüfung von Bauteilen aus stark schallstreuenden Werkstoffen, insbesondere Faserverbundwerkstoffen, austenitischen Stählen und Gußwerkstoffen, mittels Durchschallungsverfahren mit Ultraschallwellen zum Nachweis von Trennungen und Einschlüssen wie z. B. Rissen, Poren, Lunkern und Delaminationen.The invention relates to a device for testing components highly sound-scattering materials, in particular fiber composite materials, austenitic steels and cast materials, using a sonication process with ultrasonic waves for the detection of separations and inclusions such as B. cracks, pores, cavities and delaminations.
Die Prüfung von Bauteilen auf innere Fehler mittels des Durchschallungsverfahrens mit Ultraschallwellen ist Gegenstand der zerstörungsfreien Werkstoffprüfung. Es ist bekannt, zum Prüfen von Bauteilen auf innere Fehler das Durchschallungsverfahren anzuwenden. Dieses Verfahren wird beispielsweise im Lehrbuch "Werkstoffprüfung mit Ultraschall" 4. Auflage 1980 von H. und H. Krautkrämer beschrieben. Bei diesem Verfahren wird ein Senderprüfkopf mittels der Spannung eines Hochfrequenzerzeugers zur Aussendung von Ultraschallschwingungen angeregt, welche sich in ein an den Sender-Prüfkopf angekoppeltes Bauteil hinein ausbreiten. Ein auf der akustischen Achse des Hauptstrahls dem Sender-Prüfkopf gegenüberliegender, an das Bauteil angekoppelter Empfänger-Prüfkopf empfängt einen Teil der ausgesandten Wellen und gibt eine Hochfrequenzspannung an einen Verstärker ab. Die verstärkte Spannung ist bei einem Bauteil mit Fehler gegenüber einem fehlerfreien Bauteil geringer, weil am Fehler die Ausbreitung der Schallwellen behindert wird. Es wird ferner berichtet, daß vor dem Senderprüfkörper feste oder bewegliche Blenden verwendet wurden, um das Schallfeld einzugrenzen oder eine Bewegung des Sender-Prüfkopfes in einer Richtung zu ersetzen.The inspection of components for internal defects using the transmission method with ultrasonic waves is the subject of non-destructive Materials testing. It is known for testing components for internal ones Failed to apply the transmission method. This procedure will for example in the textbook "Material Testing with Ultrasound" 4th edition Described in 1980 by H. and H. Krautkrämer. This procedure uses a Transmitter probe using the voltage of a radio frequency generator for transmission excited by ultrasonic vibrations, which converge in a Spread the transmitter test head into the coupled component. One on the acoustic axis of the main beam opposite the transmitter probe, a receiver test head coupled to the component receives a part of the emitted waves and outputs a high frequency voltage to an amplifier from. The increased voltage is with a component with a defect compared to a fault-free component less because of the spread of the fault the sound waves are obstructed. It is also reported that fixed or movable screens were used in front of the transmitter test specimen narrow the sound field or move the transmitter probe in to replace one direction.
Sollen sehr kleine Fehler nachgewiesen werden, z. B. an hochbeanspruchten Bauteilen, so versagt das Verfahren dann, wenn die Bauteile aus Werkstoffen bestehen, die die Schallwellen stark streuen oder wenn die Fläche der nachzuweisenden Fehler sehr klein im Verhältnis zur Fläche des Empfänger-Prüfkopfes ist. In solchen Fällen empfängt der Empfänger-Prüfkopf stark gestörte Signale. Die Verminderung des Durchschallungssignals als Hinweis auf einen Fehler ist dann äußerst gering und wird außerdem durch Streuanzeigen überdeckt.Should very small errors be detected, e.g. B. on highly stressed Components, the method fails if the components are made of materials exist that strongly scatter the sound waves or if the surface the errors to be detected are very small in relation to the area of the Receiver probe. In such cases, the receiver probe receives strongly disturbed signals. The reduction in the transmission signal as an indication of an error is then extremely small and will also covered by scatter displays.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung zur Prüfung von hochbeanspruchten Bauteilen auf feine innere Fehler zu konzipieren, bei dem die geschilderten Nachteile vermieden werden. The invention is therefore based on the object of a device for To design testing of highly stressed components for fine internal defects, in which the disadvantages described are avoided.
Völlig überraschend konnte die Aufgabe dadurch gelöst werden, daß man eine Blende vor den Empfänger-Prüfkopf setzte. Die Blende hat vorzugsweise kegelige Form und besitzt eine zentrische Bohrung für den Schalldurchgang. Entscheidend für die Wirksamkeit der Blende ist der scharfkantige Übergang der Kegelmantelfläche zur Bohrung sowie die richtige Wahl des Bohrungsdurchmessers im Verhältnis zur kleinsten nachzuweisenden Fehlerfläche. Die Kegelmantelfläche sollte eine hohe Oberflächengüte aufweisen. Dadurch werden die seitlich einfallenden, nicht vom gerade geprüften Bereich ausgehenden Streuanteile vom Empfänger ferngehalten. Die Blende verringert außerdem die Fläche des geprüften Bereichs und verbessert bzw. verringert das Verhältnis der Prüffläche zur Fläche kleiner Fehler. Auf diese Weise konnte das Nachweisvermögen für kleine Fehler wesentlich gesteigert werden.Quite surprisingly, the task could be solved by: placed an aperture in front of the receiver probe. The aperture preferably has conical shape and has a central bore for the passage of sound. The sharp-edged one is decisive for the effectiveness of the panel Transition of the conical surface to the hole and the correct one Choice of the bore diameter in relation to the smallest to be verified Defect area. The conical surface should have a high surface quality exhibit. As a result, the side incidence, not from the straight out of the scattered areas from the receiver. The aperture also reduces the area of the tested area and improves or reduces the ratio of the test area to the area small mistake. In this way, the evidence for small Errors can be increased significantly.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Die Zeichnung zeigt einen Schnitt durch die Prüfanordnung.An embodiment of the invention is shown in the drawing and is described in more detail below. The drawing shows one Section through the test arrangement.
Sender-Prüfkopf 1 und Empfänger-Prüfkopf 4 sind mittels Wasser an das Bauteil 2 angekoppelt (Prüfung in "Tauchtechnik"). Im Fokuspunkt des zweckmäßig zu verwendenden fokusierenden Sender-Prüfkopfes 1 bzw. am Ende des Nahfeldes bei nicht fokusierenden Prüfköpfen ist das Bauteil 2 angeordnet. Die Blende 3, deren Durchgangsöffnung d üblicherweise zwischen 0,5 und 2 mm variiert wird, ist auf den Empfänger-Prüfkopf 4 aufgesteckt. Der Abstand zwischen der Blende 3 und dem Bauteil 2 sollte möglichst klein gehalten werden (z. B. 3 mm oder kleiner). Zum Nachweis von Fehlern ist eine seitliche Relativbewegung der mechanisch gekoppelten Prüfköpfe 1, 4 gegenüber dem Bauteil 2 erforderlich; Fehlstellen werden an einer Verringerung des empfangenen Signals erkannt, das z. B. an einem Oszilloskop angezeigt und beobachtet werden kann.Sender test head 1 and receiver test head 4 are coupled to component 2 by means of water (test in "immersion technology"). The component 2 is arranged at the focal point of the focussing transmitter probe 1 to be used expediently or at the end of the near field in the case of non-focussing probes. The aperture 3 , the through opening d of which is usually varied between 0.5 and 2 mm, is attached to the receiver test head 4 . The distance between the screen 3 and the component 2 should be kept as small as possible (e.g. 3 mm or less). A lateral relative movement of the mechanically coupled test heads 1, 4 relative to the component 2 is required to detect errors; Defects are recognized by a reduction in the received signal, which, for. B. can be displayed and observed on an oscilloscope.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19863633556 DE3633556A1 (en) | 1985-10-04 | 1986-10-02 | Device for non destructively testing components made of fibre-reinforced composite materials and other materials having strong ultrasound scattering for very small defects |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3535466 | 1985-10-04 | ||
DE19863633556 DE3633556A1 (en) | 1985-10-04 | 1986-10-02 | Device for non destructively testing components made of fibre-reinforced composite materials and other materials having strong ultrasound scattering for very small defects |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3633556A1 true DE3633556A1 (en) | 1987-04-09 |
Family
ID=25836692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19863633556 Withdrawn DE3633556A1 (en) | 1985-10-04 | 1986-10-02 | Device for non destructively testing components made of fibre-reinforced composite materials and other materials having strong ultrasound scattering for very small defects |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3633556A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19510731C2 (en) * | 1994-08-22 | 1999-09-16 | Diehl Stiftung & Co | Ultrasonic path in narrow channels of housings |
EP1324032A1 (en) * | 2001-12-28 | 2003-07-02 | Imal S.R.L. | Method and device for testing the presence of defects in the production of plane boards |
DE102008023185A1 (en) * | 2008-05-10 | 2009-11-19 | Leuze Electronic Gmbh + Co. Kg | ultrasonic sensor |
CN104956219A (en) * | 2013-02-01 | 2015-09-30 | 三菱重工业株式会社 | Ultrasonic flaw detection jig, ultrasonic flaw detection method, and manufacturing method for ultrasonic flaw detection jig |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1027915B (en) * | 1953-08-20 | 1958-04-10 | Realisations Ultrasoniques Sar | Device for determining fissures and cracks in flat bodies made of solid materials |
DE2757355A1 (en) * | 1977-12-22 | 1979-07-05 | Krautkraemer Gmbh | ULTRASONIC DEVICE FOR NON-DESTRUCTIVE TESTING OF BINDING AREAS |
-
1986
- 1986-10-02 DE DE19863633556 patent/DE3633556A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1027915B (en) * | 1953-08-20 | 1958-04-10 | Realisations Ultrasoniques Sar | Device for determining fissures and cracks in flat bodies made of solid materials |
DE2757355A1 (en) * | 1977-12-22 | 1979-07-05 | Krautkraemer Gmbh | ULTRASONIC DEVICE FOR NON-DESTRUCTIVE TESTING OF BINDING AREAS |
Non-Patent Citations (1)
Title |
---|
DE-Buch: J + H Krautkrämer, "Werkstoffprüfung mit Ultraschall" IV. Aufl., 1980, S. 58-71, 430-434 * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19510731C2 (en) * | 1994-08-22 | 1999-09-16 | Diehl Stiftung & Co | Ultrasonic path in narrow channels of housings |
EP1324032A1 (en) * | 2001-12-28 | 2003-07-02 | Imal S.R.L. | Method and device for testing the presence of defects in the production of plane boards |
DE102008023185A1 (en) * | 2008-05-10 | 2009-11-19 | Leuze Electronic Gmbh + Co. Kg | ultrasonic sensor |
EP2116473B1 (en) * | 2008-05-10 | 2016-02-17 | Leuze electronic GmbH + Co. KG | Ultrasound sensor |
DE102008023185B4 (en) * | 2008-05-10 | 2016-04-21 | Leuze Electronic Gmbh + Co. Kg | ultrasonic sensor |
CN104956219A (en) * | 2013-02-01 | 2015-09-30 | 三菱重工业株式会社 | Ultrasonic flaw detection jig, ultrasonic flaw detection method, and manufacturing method for ultrasonic flaw detection jig |
EP2952891A4 (en) * | 2013-02-01 | 2016-09-28 | Mitsubishi Heavy Ind Ltd | Ultrasonic flaw detection jig, ultrasonic flaw detection method, and manufacturing method for ultrasonic flaw detection jig |
US10067098B2 (en) | 2013-02-01 | 2018-09-04 | Mitsubishi Heavy Industries, Ltd. | Ultrasonic flaw detection jig, ultrasonic flaw detection method and method of manufacturing ultrasonic flaw detection jig |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8130 | Withdrawal |