DE10004049A1 - Procedure for testing plastic objects - Google Patents
Procedure for testing plastic objectsInfo
- Publication number
- DE10004049A1 DE10004049A1 DE2000104049 DE10004049A DE10004049A1 DE 10004049 A1 DE10004049 A1 DE 10004049A1 DE 2000104049 DE2000104049 DE 2000104049 DE 10004049 A DE10004049 A DE 10004049A DE 10004049 A1 DE10004049 A1 DE 10004049A1
- Authority
- DE
- Germany
- Prior art keywords
- plastic parts
- detected
- heat
- radiation
- heat radiation
- 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- Withdrawn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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
- B29C65/2053—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position
- B29C65/2061—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position by sliding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/82—Testing the joint
- B29C65/8253—Testing the joint by the use of waves or particle radiation, e.g. visual examination, scanning electron microscopy, or X-rays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/82—Testing the joint
- B29C65/8261—Testing the joint by the use of thermal means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
- B29C66/5324—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length
- B29C66/53245—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow
- B29C66/53246—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow said single elements being spouts, e.g. joining spouts to containers
- B29C66/53247—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length said articles being hollow said single elements being spouts, e.g. joining spouts to containers said spouts comprising flanges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
- B29C66/91216—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods enabling contactless temperature measurements, e.g. using a pyrometer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
- B29C66/967—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes
- B29C66/9672—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes involving special data inputs, e.g. involving barcodes, RFID tags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7172—Fuel tanks, jerry cans
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/737—Articles provided with holes, e.g. grids, sieves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/44—Resins; rubber; leather
Abstract
Die Erfindung betrifft ein Verfahren zum Prüfen einer Schweißnaht zwischen Kunststoffteilen mit Hilfe der Thermographie, das kostengünstig ist und zuverlässig undichte Nähte erkennbar macht. Dies geschieht in der Weise, dass die Wärmestrahlung der Kunststoffteile im Schweißnahtbereich mit mindestens einer Kamera, beispielsweise einer digitalen Infrarotkamera, erfasst wird und mit mindestens einem Referenzwert computermäßig verglichen wird.The invention relates to a method for testing a weld seam between plastic parts with the help of thermography, which is inexpensive and reliably recognizes leaky seams. This is done in such a way that the heat radiation of the plastic parts in the weld area is recorded with at least one camera, for example a digital infrared camera, and is compared by computer with at least one reference value.
Description
Die Erfindung betrifft ein Verfahren zum Prüfen einer Schweißnaht zwischen Kunststoffteilen.The invention relates to a method for testing a weld between Plastic parts.
Beim Herstellen von Gegenständen durch Zusammenfügen von Kunststoff teilen, wird für gewöhnlich ein Schweißen in der einen oder anderen Form angewandt. Da es sich bei vielen der in Rede stehenden Kunststoffteile um Behälter oder Tanks handelt, die später eine Flüssigkeit enthalten, muß natürlich die Naht zwischen den Kunststoffteilen nach dem Schweißen dicht sein. Daher werden die Behälter nach dem Zusammenbau für gewöhnlich durch Testen mit einem Vakuum oder mit Überdruck geprüft, um festzustel len, ob die Naht adäquat ist oder nicht. Die Praxis zeigt jedoch, dass eine solche Überprüfung von Schweißnähten mit Vakuum oder Überdruck sowohl zeitaufwendig als auch teuer ist. Es gibt auch zu viele Fälle, in denen die Kontrolle nicht dazu in der Lage ist, mögliche Lecks in der Schweißnaht auf zufinden. Damit läuft der Hersteller Gefahr, unzulängliche Behälter mit den damit verbundenen unerwünschten Konsequenzen auf den Markt zu brin gen.When making objects by joining plastic sharing is usually welding in one form or another applied. Since many of the plastic parts in question are Containers or tanks that later contain a liquid must of course the seam between the plastic parts is tight after welding his. Therefore, the containers become common after assembly checked by testing with a vacuum or overpressure to determine check whether the seam is adequate or not. Practice shows, however, that a such inspection of welds with vacuum or overpressure both is time consuming as well as expensive. There are also too many cases where the Control is unable to detect possible leaks in the weld to find. The manufacturer runs the risk of inadequate containers with the related undesirable consequences to the market gene.
Das Hauptziel der Erfindung ist es, ein Verfahren zum Überprüfen der Nähte zwischen Kunststoffteilen, die durch Schweißen zusammengefügt sind, zu schaffen und die oben erwähnte Anwendung eines Vakuums oder Über drucks zu vermeiden. Dies geschieht mit Hilfe der Thermographie in der Weise, daß die Wärmestrahlung eines Bereichs um die Naht als Mittel dient, um festzustellen, ob die Schweißnaht dicht ist oder nicht. Dadurch wird die Kontrolle weitaus kostengünstiger und dazu weit zuverlässiger.The main aim of the invention is to provide a method for checking the seams between plastic parts that are joined together by welding create and the above-mentioned application of a vacuum or over to avoid pressure. This is done with the help of thermography in the Way that the heat radiation of an area around the seam serves as a means to determine whether the weld is tight or not. This will make the Control much cheaper and more reliable.
Ein weiteres Ziel ist es die Kontrolle zu einem Zeitpunkt durchzuführen, der für das in Rede stehende Objekt, den Produktionsort, die Schweißwerk zeuge etc. der günstigste ist. Dies kann sowohl durch eine Vorkontrolle geschehen, basierend auf der Wärmestrahlung nach dem Erwärmen der Kunststoffteile im Nahtbereich und vorzugsweise vor dem Zusammenfügen der Kunststoffteile als auch bei einer Nachkontrolle, basierend auf der Wär mestrahlung aus der Restwärme während des Abkühlens oder als nachträg liche Kontrolle nach dem Abkühlen des Nahtbereichs, basierend auf der Strahlung aus Fremdwärme, die nach dem Abkühlen eingebracht wird.Another goal is to carry out the control at a time that for the object in question, the production site, the welding plant witness etc. is the cheapest. This can be done through a preliminary check happen based on the heat radiation after heating the Plastic parts in the seam area and preferably before joining the plastic parts as well as a follow-up inspection based on the heat radiation from the residual heat during cooling or as a retrofit Check after the seam area has cooled, based on the Radiation from external heat that is introduced after cooling.
Im einzelnen besteht die Erfindung darin, daß die Wärmestrahlung im Naht bereich mit mindestens einer Kamera, z. B. einer digitalen Infrarotkamera, erfasst und mit mindestens einem Referenzwert durch Computer verglichen wird, um festzustellen, ob das Verschmelzen der Kunststoffteile in dem Bereich um die Naht angemessen ist.In particular, the invention is that the heat radiation in the seam area with at least one camera, e.g. B. a digital infrared camera, recorded and compared with at least one reference value by computer to determine if the plastic parts are melting into the Area around the seam is appropriate.
Die Erfindung wird im folgenden anhand von in den Zeichnungen darge stellten Ausführungsbeispielen der Erfindung des näheren erläutert:The invention is illustrated below with reference to the drawings presented embodiments of the invention explained in more detail:
Fig. 1A bis D zeigen schematische Ansichten, bei denen die Wärmestrahlung im Nahtbereich mit Hilfe einer digitalen Kamera erfaßt wird und die Kunststoffteile zum Verschmelzen mittels eines Wärmereflektors auf die richtige Temperatur erwärmt werden. Die Wärmestrahlung wird dabei nach dem Erwärmen und vor dem Zusammenfügen der Kunststoffteile beobachtet. Figs. 1A to D are schematic views in which the heat radiation in the weld area by means of a digital camera is detected, and the plastics parts are heated to fuse by means of a heat reflector at the proper temperature. The heat radiation is observed after heating and before joining the plastic parts.
Fig. 2 zeigt eine schematische Ansicht einer weiteren Ausführungsform der Erfindung, bei der die Wärmestrahlung im Nahtbereich während des Abkühlens nach dem Verschmelzen erfaßt wird; und FIG. 2 shows a schematic view of a further embodiment of the invention, in which the heat radiation in the seam region is detected during cooling after the fusion; and
Fig. 3 zeigt eine schematische Ansicht einer anderen Ausführungsform der Erfindung, bei der die Wärmestrahlung erst nach dem Abkühlen im Anschluß an das Verschmelzen erfaßt und Fremdwärme mittels mindestens eines Blitzlichtgerätes zugeführt wird. Fig. 3 shows a schematic view of another embodiment of the invention, in which the heat radiation is detected only after cooling after the fusion and external heat is supplied by means of at least one flash unit.
Die Erfindung bezieht sich auf ein Verfahren, das geeignet ist, eine Naht zwischen Kunststoffteilen 1, 2 zu überprüfen, die durch Schweißen zusam mengefügt sind. Die Überprüfung der Schweißtnaht geschieht so, dass die Wärmestrahlung der Kunststoffteile 1, 2 im Nahtbereich mittels mindestens einer Kamera 3, z. B. einer digitalen Infrarotkamera, erfaßt wird. Anschlie ßend wird die erfaßte Wärmestrahlung von der Kamera 3 zu einem nicht dargestellten Computer übertragen, der so programmiert ist, dass die festge stellte Wärmestrahlung mit mindestens einem Referenzwert verglichen wird. Auf diese Weise kann der Computer feststellen, ob die Naht zwischen den Kunststoffteilen 1, 2 die Qualitätsanforderungen, die für ein adäquates Ver schmelzen maßgebend sind, getroffen werden, so dass mit unzulänglichen Nähten hergestellte Teile ausgeschleust werden können.The invention relates to a method which is suitable for checking a seam between plastic parts 1 , 2 which are joined together by welding. The weld seam is checked in such a way that the heat radiation of the plastic parts 1 , 2 in the seam area by means of at least one camera 3 , e.g. B. a digital infrared camera is detected. The detected thermal radiation is then transmitted from the camera 3 to a computer, not shown, which is programmed in such a way that the thermal radiation determined is compared with at least one reference value. In this way, the computer can determine whether the seam between the plastic parts 1 , 2 meets the quality requirements that are decisive for an adequate melting, so that parts produced with inadequate seams can be rejected.
Der Referenzwert kann entweder aus einem Wärmestrahlungsbild bestehen, das mit der Kamera 3 aufgenommen worden ist und bei dem Bedingungen während des Schweißens herrschen, die eine adäquate Nahtbeschaffenheit gewährleisten, oder er kann in einer vorbestimmten Temperaturverteilung, auch Temperaturen an ausgewählten Stellen, an den Kunststoffteilen 1, 2 zu bestimmten Zeitpunkten nach dem Erwärmen bestehen. Im diesem Fall muß der Computer so programmiert sein, dass die wirkliche Temperaturvertei lung, möglicherweise die Temperaturen an den ausgewählten Stellen, in den Kunststoffteilen 1, 2 auf der Basis der beobachteten Wärmestrahlung berechnet wird. Die vorbestimmte Temperaturverteilung, bzw. die Tempera turen an den ausgewählten Stellen, wird durch Berechnungen erstellt, die theoretisch eine adäquate Naht nach dem Verschmelzen gewährleisten. Diese Berechnungen können ebenso eine Grundlage für Versuche bilden.The reference value can either consist of a thermal radiation image that has been recorded with the camera 3 and in which conditions prevail during welding that ensure an adequate seam quality, or it can be in a predetermined temperature distribution, including temperatures at selected locations, on the plastic parts 1 , 2 exist at certain times after heating. In this case, the computer must be programmed so that the actual temperature distribution, possibly the temperatures at the selected locations, in the plastic parts 1 , 2 is calculated on the basis of the observed thermal radiation. The predetermined temperature distribution, or the tempera tures at the selected points, is created by calculations that theoretically ensure an adequate seam after the fusion. These calculations can also form the basis for experiments.
Die Überprüfung der Schweißnaht kann, wie erwähnt, zu verschiedenen Zeitpunkten erfolgen, und hierfür typische Beispiele werden detailliert im Fol genden mit Bezug auf die Figuren erläutert. As mentioned, the inspection of the weld seam can be different At times, and typical examples of this are detailed in fol gends explained with reference to the figures.
In den Fig. 1A-D ist eine Ausführungsform der Erfindung dargestellt, bei der die Prüfung als Vorkontrolle stattfindet, bei der mithin die Wärmestrahlung nach dem Erwärmen der beiden Kunststoffteile 1, 2 beobachtet wird, bevor das Zusammenfügen stattfindet, so dass sich die Bedingungen beim Ver schweißen im Nahtbereich mit mindestens einem idealen Referenzwert vergleichen lassen, der ein adäquates Verschmelzen der Kunststoffteile 1, 2 beim Verschweißen garantiert. Dieser ideale Referenzwert kann entweder in der Form eines früher aufgenommenen Strahlungsbildes entsprechender richtig erwärmter Kunststoffteile 1, 2 vorliegen, oder er kann in Form einer (theoretisch) vorbestimmten Temperaturverteilung, möglicherweise vorbe stimmte Temperaturen an ausgewählten Stellen, in den Kunststoffteilen 1, 2 vorliegen.In FIGS. 1A-D, an embodiment of the invention is shown, in which the examination takes place as a preliminary inspection, and therefore the heat radiation after the heating of the two plastic parts 1, is observed 2 in which, before the assembly takes place, the conditions that when Have the welding in the seam area compared with at least one ideal reference value, which guarantees an adequate fusion of the plastic parts 1 , 2 during welding. This ideal reference value can either be in the form of a previously recorded radiation image of corresponding correctly heated plastic parts 1 , 2 , or it can be in the form of a (theoretically) predetermined temperature distribution, possibly predetermined temperatures at selected points, in the plastic parts 1 , 2 .
Die Wärmestrahlung der Kunststoffteile 1, 2 wird mit mindestens einer digi talen Infrarotkamera 3 beobachtet. Die Kamera zeichnet die Wärmestrahlung in verschiedenen Farben auf. Sie wird von der Kamera 3 zu einem Computer übertragen, der die aufgezeichnete Wärmestrahlung mit einem ausgewähl ten Referenzwert vergleicht, bei dem es sich entweder um ein zuvor aufge zeichnetes Bild handelt oder um eine entsprechende vorbestimmte Tempe raturverteilung oder die Temperaturen an ausgewählten Stellen der Kunst stoffteile 1, 2. Wird das Strahlungsbild mit der jeweiligen vorbestimmten Temperatur verglichen, ist der Computer so programmiert, dass die wirkliche Temperaturverteilung oder die Temperaturen an ausgewählten Stellen auf der Grundlage erfaßter Wärmestrahlung berechnet ist. Normalerweise reicht eine einzige Beobachtung der Wärmestrahlung während der Vorkontrolle der Kunststoffteile 1, 2 aus; jedoch hindert dies nicht daran mehrere Beobach tungen, wann immer notwendig, durchzuführen. Fehlerhafte Kunststoffteile 1, 2 werden ausgesondert und/oder die Erwärmungsparameter werden ent sprechend angeglichen; sodann findet das Erwärmen von neuem statt, wenn der Computer anzeigt, daß eine zu starke Abweichung der ermittelten Wär mestrahlung von dem jeweiligen Referenzwert vorliegt. Außerdem kann der Computer so programmiert sein, dass er in solch einem Fall ein Signal abgibt, so dass die Produktion zum Nachstellen der Prozeßparameter unter brochen wird. Die Dauer der Prozeßkontrolle und der Maßnahmen nach dem Feststellen von Schweißfehlern, hängt vom Produkt, der Fertigungsstraße, den Anforderungen des Kunden, der Qualitätskontrolle etc. ab.The heat radiation of the plastic parts 1 , 2 is observed with at least one digital infrared camera 3 . The camera records the heat radiation in different colors. It is transmitted from the camera 3 to a computer, which compares the recorded heat radiation with a selected reference value, which is either a previously recorded image or a corresponding predetermined temperature distribution or the temperatures at selected points in the plastic parts 1 , 2 . If the radiation image is compared with the respective predetermined temperature, the computer is programmed in such a way that the actual temperature distribution or the temperatures at selected points is calculated on the basis of sensed thermal radiation. Normally, a single observation of the heat radiation is sufficient during the preliminary inspection of the plastic parts 1 , 2 ; however, this does not prevent multiple observations from being made whenever necessary. Defective plastic parts 1 , 2 are discarded and / or the heating parameters are adjusted accordingly; then the heating takes place again when the computer indicates that there is an excessive deviation of the heat radiation determined from the respective reference value. In addition, the computer can be programmed so that it emits a signal in such a case, so that the production is interrupted to readjust the process parameters. The duration of the process control and the measures after the detection of welding defects depends on the product, the production line, the requirements of the customer, quality control etc.
Die Fig. 1A bis D veranschaulichen die erwähnte Vorkontrolle im Zusam menhang mit dem Anschweißen eines Füllstutzens 2 an einen Benzintank 1 aus Kunststoff. Der Füllstutzen 2 kann mittels eines Roboters 5 in eine Posi tion über den Tank 1 gebracht werden, wonach ein sogenannter Wärme spiegel 4 zwischen den Tank 1 und den Füllstutzen 2 gebracht wird. Sodann werden der Tank 1, der Füllstutzen 2 und der Wärmespiegel 4 positioniert (siehe Fig. 1D) und dem Tank 1 und dem Füllstutzen 2 Wärme zugeführt, bis sie die erforderliche Schmelztemperatur und das gewünschte Anschmelzen in bezug auf die Tiefe, das Eindringen und den Bereich erreicht haben. In Abhängigkeit von der spezifischen Wärmeeigenschaft des Kunststoffs und des zu erwärmenden Körpers kann eine differenzierte Wärmezufuhr stattfin den, so dass die richtige Temperatur in dem Tank 1 und dem Füllstutzen 2 gleichzeitig erreicht wird. Anschließend wird der Wärmespiegel entfernt, bevor der Füllstutzen 2 und/oder der Tank 1 in eine Position gebracht wer den, in der sich die Wärmestrahlung mit einer digitalen lnfrarotkamera 3 beobachten läßt, (siehe Fig. 1C). Die Wärmebilder des Füllstutzens 2 und des Tanks 1 können separat oder gleichzeitig erfaßt bzw. aufgezeichnet werden, je nach der Beschaffenheit der Teile. Es ließe sich auch ein nicht dargestellter Spiegel für ein und/oder beide Teile verwenden, so dass nur ein begrenztes Drehen oder gar kein Drehen des Teils oder der Teile erforder lich ist. Wenn der anschließende Vergleich der beobachteten Wärmestrah lung mit dem entsprechenden Referenzwert des Computersystems zeigt, dass der Tank 1 und der Füllstutzen 2 die vorgegebene Temperatur erreicht haben, wird der Füllstutzen 2 mittels des Roboters 5 auf den Tank 1 gebracht, so dass das Verschweißen stattfinden kann (Fig. 1D.). The Figs. 1A to D illustrate the aforementioned preliminary control assistance related to the welding of a filling nozzle 2 to a fuel tank 1 made of plastic. The filler neck 2 can be brought into a position via the tank 1 by means of a robot 5 , after which a so-called heat mirror 4 is brought between the tank 1 and the filler neck 2 . Then the tank 1 , the filler neck 2 and the heat level 4 are positioned (see FIG. 1D) and the tank 1 and the filler neck 2 are supplied with heat until they have the required melting temperature and the desired melting in terms of depth, penetration and Have reached the area. Depending on the specific heat properties of the plastic and the body to be heated, a differentiated supply of heat can take place, so that the correct temperature in the tank 1 and the filler neck 2 is reached simultaneously. The heat level is then removed before the filler neck 2 and / or the tank 1 is brought into a position in which the heat radiation can be observed with a digital infrared camera 3 (see FIG. 1C). The thermal images of the filler neck 2 and the tank 1 can be recorded or recorded separately or simultaneously, depending on the nature of the parts. It could also use a mirror, not shown, for one and / or both parts, so that only a limited rotation or no rotation of the part or parts is required. If the subsequent comparison of the observed heat radiation with the corresponding reference value of the computer system shows that the tank 1 and the filler neck 2 have reached the predetermined temperature, the filler neck 2 is brought onto the tank 1 by means of the robot 5 , so that the welding can take place ( Fig. 1D.).
Fig. 2 zeigt eine weitere Ausführung der Erfindung, bei der die Überprüfung der Schweißnaht während des Abkühlens der Kunststoffteile 1, 2 nach dem Verschweißen stattfindet. Wenn das Erwärmen richtig verlaufen ist und die Kunststoffteile die richtige Position und den richtigen Kontakt beim Schwei ßen erreicht haben, entwickelt sich die Temperaturverteilung beim Abkühlen nach einem sehr speziellem Schema. Diese besondere Temperaturvertei lung beim Abkühlen erlaubt eine Nachkontrolle der Schweißnaht aufgrund der festgestellten Wärmestrahlung aufgrund der Restwärme in den Kunst stoffteilen 1, 2 beim Abkühlen. Fig. 2 shows a further embodiment of the invention, in which the inspection of the weld seam takes place during the cooling of the plastic parts 1 , 2 after welding. If the heating has gone correctly and the plastic parts have reached the right position and the right contact during welding, the temperature distribution during cooling will develop according to a very special scheme. This special temperature distribution during cooling allows a subsequent inspection of the weld seam due to the heat radiation determined due to the residual heat in the plastic parts 1 , 2 during cooling.
Ferner wird die aufgenommene Wärmestrahlung mit mindestens einem Referenzbild verglichen, das ein Abbild der Wärmestrahlung entsprechender Kunststoffteile 1, 2 bei idealen Bedingungen zu dem jeweiligen Zeitpunkt ist, oder sie kann mit mindestens einem Referenzwert der vorbestimmten Tem peraturverteilungen oder den vorbestimmten Temperaturen an ausgewählten Stellen der Kunststoffteile 1, 2 verglichen werden. Im letzteren Fall ist der Computer so eingerichtet, dass die Temperaturverteilung oder die Tempe raturen an verschiedenen Stellen auf der Grundlage der aufgenommenen Wärmestrahlung zu dem jeweiligen Zeitpunkt während des Abkühlens berechnet werden.Furthermore, the recorded heat radiation is compared with at least one reference image, which is an image of the heat radiation of corresponding plastic parts 1 , 2 under ideal conditions at the respective point in time, or it can be at least one reference value of the predetermined temperature distributions or the predetermined temperatures at selected locations on the plastic parts 1 , 2 are compared. In the latter case, the computer is set up in such a way that the temperature distribution or the temperatures at various points are calculated on the basis of the heat radiation recorded at the respective time during the cooling.
Zudem zeigt Fig. 2 denselben Benzintank 1 und den Einfüllstutzen 2, gemäß Fig. 1, jedoch sind hier die Einzelteile in Position gebracht und bereits ver schweißt. Ferner ist die Kamera 3 über dem Stutzen platziert, so dass die Wärmestrahlung von der Restwärme in dem Tank 1 und dem Stutzen 2 auf gezeichnet wird. Darüber hinaus entspricht diese Ausführungsform dem, was in Verbindung mit der Ausführungsform nach Fig. 1 ausgeführt worden ist.In addition, Fig. 2 shows the same fuel tank 1 and the filler neck 2 , according to FIG. 1, but here the items are brought into position and already welded ver. Furthermore, the camera 3 is placed over the nozzle, so that the heat radiation from the residual heat in the tank 1 and the nozzle 2 is drawn on. Furthermore, this embodiment corresponds to what has been carried out in connection with the embodiment according to FIG. 1.
Fig. 3 zeigt eine Ausführungsform der Erfindung, bei der die Prüfung der Schweißnaht erst nach dem Abkühlen der Kunststoffteile 1, 2 stattfindet. Hierbei wird die Kontrolle mittels externer Wärme durchgeführt, die den abgekühlten Kunststoffteilen 1, 2 in dem Bereich um die Schweißnaht zuge führt wird. Die Wärme kann als kurzer Wärme- oder Lichtimpuls zugeführt werden, z. B. durch mindestens ein Blitzgerät. Die Wärmeenergie breitet sich von der Oberfläche dann in die Kunststoffteile 1, 2 aus. Jedoch verhindern jegliche Fehler in der Schweißnaht diese Ausbreitung. Die Folge ist, dass die Kunststoffteile 1, 2 an ihrer Oberfläche, wo sich der Fehler befindet, langsa mer abkühlen und daher länger warm bleiben. Diese Ausbreitung der zugeführten Wärme erlaubt es somit die Nachkontrolle der Schweißnaht auf grund der Wärmestrahlung aus der den Kunststoffteilen 1, 2 zugeführten Wärme durchzuführen. Ferner wird die aufgenommene Wärmestrahlung mit mindestens einem Referenzbild verglichen, das eine bildliche Beschreibung der Wärmestrahlung von Kunststoffteilen 1, 2 ist, denen nach dem Abkühlen Wärme auf eine entsprechende Weise zugeführt worden ist, und die unter idealen Bedingungen zwischen einem Unterbrechen des Erwärmens und dem Verschweißen zusammengefügt worden sind; oder die Wärmestrahlung wird mit mindestens einem Referenzwert der vorbestimmten Temperatur verteilung oder auch vorbestimmter Temperaturen an ausgewählten Stellen der Kunststoffteile 1, 2, verglichen. Im letzteren Fall ist der Computer so ein gerichtet, dass die Temperaturverteilung, oder die Temperaturen an den ausgewählten Stellen auf der Grundlage der Wärmestrahlung berechnet werden, die zu dem oder den jeweiligen Zeitpunkten nach dem Erwärmen aufgezeichnet wurde. Dies geschieht vorzugsweise nachdem die Schweiß naht einer mechanischen Belastung ausgesetzt worden ist. Fig. 3 shows an embodiment of the invention, in which the testing of the weld takes place only after cooling of the plastic parts 1, 2. In this case, the control is carried out by means of external heat, which leads to the cooled plastic parts 1 , 2 in the area around the weld seam. The heat can be supplied as a short heat or light pulse, e.g. B. by at least one flash. The thermal energy then spreads from the surface into the plastic parts 1 , 2 . However, any defects in the weld seam prevent this spread. The result is that the plastic parts 1 , 2 cool slowly on their surface, where the fault is located, and therefore remain warm longer. This spreading of the heat supplied thus allows the weld to be checked again on the basis of the heat radiation from the heat supplied to the plastic parts 1 , 2 . Furthermore, the recorded thermal radiation is compared with at least one reference image, which is a pictorial description of the thermal radiation from plastic parts 1 , 2 , to which heat has been supplied in a corresponding manner after cooling, and which, under ideal conditions, between an interruption of the heating and the welding have been put together; or the heat radiation is compared with at least one reference value of the predetermined temperature distribution or also predetermined temperatures at selected locations of the plastic parts 1 , 2 . In the latter case, the computer is set up so that the temperature distribution or the temperatures at the selected locations are calculated on the basis of the heat radiation which was recorded at the respective time or points after the heating. This is preferably done after the weld has been subjected to mechanical stress.
Fig. 3 zeigt darüber hinaus denselben Benzintank 1 und den Einfüllstutzen 2, aus Fig. 1, jedoch sind sie hier nach dem Verschweißen zunächst abgekühlt worden. Wärme wird mittels zweier Blitzgeräte 6 zugeführt. Ferner ist die Kamera 3 an dem Stutzen 2 platziert, so dass sich die Wärmestrahlung aus der Wärme, die in den Tank 1 und den Stutzen 2 eingebracht worden ist, beobachten läßt. Im übrigen entspricht diese Ausführungsform dem, was in Verbindung mit der Ausführungsform nach Fig. 1 ausgeführt worden ist. FIG. 3 also shows the same petrol tank 1 and the filler neck 2 from FIG. 1, but here they were first cooled down after welding. Heat is supplied by means of two flash units 6 . Furthermore, the camera 3 is placed on the nozzle 2 , so that the heat radiation from the heat which has been introduced into the tank 1 and the nozzle 2 can be observed. Otherwise, this embodiment corresponds to what has been carried out in connection with the embodiment according to FIG. 1.
Die Erfindung schafft ein Verfahren zum Überprüfen von Schweißnähten, das schnell in der Anwendung ist und sich automatisch in einer Fertigungs straße durchführen läßt, ohne dass sich Verzögerungen in der Produktion ergeben. Darüber hinaus ist das Verfahren derart flexibel, dass es eine oder mehrere Ausführungsformen erlaubt, je nach dem wie die Kunststoffteile und/oder die Fertigung beschaffen sind. Dies bedeutet hohe Kosteneinspa rungen als Konsequenz des geringen Zeitaufwandes, der Möglichkeit, Fehler frühzeitig festzustellen und der Tatsache, dass die in den Gebrauch genom menen Objekte nicht aufgrund von Leckagen an den Schweißnähten zurückgenommen werden müssen. Ferner ist die Prüfung sehr genau, gleichviel wie sie im einzelnen geschieht.The invention provides a method for checking weld seams, that is quick to use and automatically in a manufacturing process road can be carried out without delays in production surrender. In addition, the method is so flexible that it is one or allowed several embodiments, depending on how the plastic parts and / or the production is procured. This means high cost savings as a consequence of the small amount of time, the possibility of errors early on and the fact that the genom in use objects due to leakage at the welds have to be withdrawn. Furthermore, the test is very accurate no matter how it happens in detail.
Claims (12)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO19990480A NO311174B1 (en) | 1999-02-02 | 1999-02-02 | Procedure for checking joints between plastic parts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE10004049A1 true DE10004049A1 (en) | 2000-08-03 |
Family
ID=19902901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2000104049 Withdrawn DE10004049A1 (en) | 1999-02-02 | 2000-01-31 | Procedure for testing plastic objects |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE10004049A1 (en) |
| FR (1) | FR2789179A1 (en) |
| GB (1) | GB2346688A (en) |
| NO (1) | NO311174B1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006027028A1 (en) * | 2006-06-09 | 2007-12-13 | Ise Intex Gmbh | Plastic shaped part production monitoring method, involves producing plastic shaped part in tool, and recording produced plastic shaped part by thermal image camera after removal of plastic shaped part from tool |
| WO2009003702A1 (en) * | 2007-07-04 | 2009-01-08 | Thermosensorik Gmbh | Method for the automatic inspection of a welding seam using heat flow thermography |
| DE102007031206B3 (en) * | 2007-07-04 | 2009-02-05 | Thermosensorik Gmbh | Welding seam inspection method for use during building of car body, in automobile industry, involves using thermal image to detect and evaluate welding seam with respect to different types of defects |
| EP2189786A2 (en) * | 2008-11-20 | 2010-05-26 | Benteler Automobiltechnik GmbH | Method and device for non-destructive quality determination of a weld seam and welding device |
| DE102010020874A1 (en) | 2010-05-18 | 2011-11-24 | Thermosensorik Gmbh | Method for reducing measuring time of thermographic testing of component i.e. shell plate part of aircraft, involves receiving series of infrared images at receiving position, and covering regions to be tested by image fields at position |
| RU2464551C2 (en) * | 2007-07-04 | 2012-10-20 | Термосенсорик Гмбх | Method for automated flaw detection of weld joint via thermography |
| DE102013003760A1 (en) * | 2013-03-06 | 2014-09-11 | MTU Aero Engines AG | Method and device for quality evaluation of a component produced by means of a generative laser sintering and / or laser melting process |
| AT514632A3 (en) * | 2012-06-15 | 2015-06-15 | Akad Gorniczo Hutnicza | Apparatus for evaluating the technical condition of the surface of traction devices of rubber or plastics and methods of assessing the technical condition of rubber or plastics |
| WO2020043343A1 (en) * | 2018-08-31 | 2020-03-05 | Kautex Textron Gmbh & Co. Kg | Method for testing a connection of a built-in component in a plastic moulded part in the form of a hollow article |
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| US4410381A (en) * | 1982-01-26 | 1983-10-18 | Ford Motor Company | Methods and apparatus for testing the quality of an ultrasonic weld in thermoplastic material |
| ATE28935T1 (en) * | 1982-03-18 | 1987-08-15 | Atomic Energy Authority Uk | THERMOGRAPHY OF BALANCING PROCEDURES. |
| GB8921160D0 (en) * | 1989-09-19 | 1989-11-08 | Atomic Energy Authority Uk | Thermographic inspection |
| US5111048A (en) * | 1990-09-27 | 1992-05-05 | General Electric Company | Apparatus and method for detecting fatigue cracks using infrared thermography |
| US5240329A (en) * | 1992-08-14 | 1993-08-31 | Ford Motor Company | Non-destructive method for detecting defects in a workpiece |
| DE4311320A1 (en) * | 1993-04-06 | 1994-10-13 | Branson Ultraschall | Method and device for checking the weld seam quality in the joining of plastics parts |
| JPH10100258A (en) * | 1996-09-26 | 1998-04-21 | Yasuo Nannichi | Apparatus for fusion weld of plastics |
| DE19650883C2 (en) * | 1996-12-07 | 1999-09-23 | Saechsisches Textilforsch Inst | Process for non-contact and non-destructive testing of welds on moving webs |
| DE19703484A1 (en) * | 1997-01-31 | 1998-08-06 | Img Inst Fuer Maschinen Antrie | Method of non-destructive testing of materials and composites for internal defects using thermography |
-
1999
- 1999-02-02 NO NO19990480A patent/NO311174B1/en unknown
-
2000
- 2000-01-06 GB GB0000135A patent/GB2346688A/en not_active Withdrawn
- 2000-01-19 FR FR0000639A patent/FR2789179A1/en active Pending
- 2000-01-31 DE DE2000104049 patent/DE10004049A1/en not_active Withdrawn
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006027028A1 (en) * | 2006-06-09 | 2007-12-13 | Ise Intex Gmbh | Plastic shaped part production monitoring method, involves producing plastic shaped part in tool, and recording produced plastic shaped part by thermal image camera after removal of plastic shaped part from tool |
| RU2464551C2 (en) * | 2007-07-04 | 2012-10-20 | Термосенсорик Гмбх | Method for automated flaw detection of weld joint via thermography |
| WO2009003702A1 (en) * | 2007-07-04 | 2009-01-08 | Thermosensorik Gmbh | Method for the automatic inspection of a welding seam using heat flow thermography |
| DE102007031206B3 (en) * | 2007-07-04 | 2009-02-05 | Thermosensorik Gmbh | Welding seam inspection method for use during building of car body, in automobile industry, involves using thermal image to detect and evaluate welding seam with respect to different types of defects |
| DE102007031206B8 (en) * | 2007-07-04 | 2009-05-28 | Thermosensorik Gmbh | Method for automatic inspection of a weld |
| US8471207B2 (en) | 2007-07-04 | 2013-06-25 | Roman Louban | Method for the automatic inspection of a welding seam by means of heat flow thermography |
| EP2189786A2 (en) * | 2008-11-20 | 2010-05-26 | Benteler Automobiltechnik GmbH | Method and device for non-destructive quality determination of a weld seam and welding device |
| EP2189786A3 (en) * | 2008-11-20 | 2012-11-14 | Benteler Automobiltechnik GmbH | Method and device for non-destructive quality determination of a weld seam and welding device |
| DE102010020874A1 (en) | 2010-05-18 | 2011-11-24 | Thermosensorik Gmbh | Method for reducing measuring time of thermographic testing of component i.e. shell plate part of aircraft, involves receiving series of infrared images at receiving position, and covering regions to be tested by image fields at position |
| AT514632A3 (en) * | 2012-06-15 | 2015-06-15 | Akad Gorniczo Hutnicza | Apparatus for evaluating the technical condition of the surface of traction devices of rubber or plastics and methods of assessing the technical condition of rubber or plastics |
| AT514632B1 (en) * | 2012-06-15 | 2015-09-15 | Akad Gorniczo Hutnicza | Apparatus for evaluating the technical condition of the surface of traction devices of rubber or plastics and methods of assessing the technical condition of rubber or plastics |
| DE102013003760A1 (en) * | 2013-03-06 | 2014-09-11 | MTU Aero Engines AG | Method and device for quality evaluation of a component produced by means of a generative laser sintering and / or laser melting process |
| US20160018320A1 (en) * | 2013-03-06 | 2016-01-21 | MTU Aero Engines AG | Method and device for evaluating the quality of a component produced by means of an additive laser sintering and/or laser melting method |
| EP2964449B1 (en) | 2013-03-06 | 2018-05-30 | MTU Aero Engines GmbH | Method and device for evaluating the quality of a component produced by means of an additive laser sintering and/or laser melting method |
| US10520427B2 (en) | 2013-03-06 | 2019-12-31 | MTU Aero Engines AG | Method and device for evaluating the quality of a component produced by means of an additive laser sintering and/or laser melting method |
| US10900890B2 (en) | 2013-03-06 | 2021-01-26 | MTU Aero Engines AG | Method and device for evaluating the quality of a component produced by means of an additive laser sintering and/or laser melting method |
| US11931955B2 (en) | 2013-03-06 | 2024-03-19 | MTU Aero Engines AG | Method for evaluating the quality of a component produced by an additive sintering and/or melting method |
| WO2020043343A1 (en) * | 2018-08-31 | 2020-03-05 | Kautex Textron Gmbh & Co. Kg | Method for testing a connection of a built-in component in a plastic moulded part in the form of a hollow article |
| DE102018214827A1 (en) * | 2018-08-31 | 2020-03-05 | Kautex Textron Gmbh & Co. Kg | Method for testing a connection of an installation part in a molded plastic part designed as a hollow body |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2346688A (en) | 2000-08-16 |
| GB0000135D0 (en) | 2000-02-23 |
| NO311174B1 (en) | 2001-10-22 |
| NO990480L (en) | 2000-08-03 |
| NO990480D0 (en) | 1999-02-02 |
| FR2789179A1 (en) | 2000-08-04 |
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