EP0853516B1 - Procede de controle qualite dans des machines a tirer les noyaux ou les carapaces - Google Patents

Procede de controle qualite dans des machines a tirer les noyaux ou les carapaces Download PDF

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Publication number
EP0853516B1
EP0853516B1 EP96944559A EP96944559A EP0853516B1 EP 0853516 B1 EP0853516 B1 EP 0853516B1 EP 96944559 A EP96944559 A EP 96944559A EP 96944559 A EP96944559 A EP 96944559A EP 0853516 B1 EP0853516 B1 EP 0853516B1
Authority
EP
European Patent Office
Prior art keywords
moulding
mould
inspected
core
tool
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.)
Expired - Lifetime
Application number
EP96944559A
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German (de)
English (en)
Other versions
EP0853516A2 (fr
Inventor
Walter L. PÖHLANDT
Mohammed Ali Seiraffi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Adolf Hottinger KG
Original Assignee
Adolf Hottinger KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Adolf Hottinger KG filed Critical Adolf Hottinger KG
Publication of EP0853516A2 publication Critical patent/EP0853516A2/fr
Application granted granted Critical
Publication of EP0853516B1 publication Critical patent/EP0853516B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C19/00—Components or accessories for moulding machines
    • B22C19/04—Controlling devices specially designed for moulding machines

Definitions

  • the invention relates to a method for quality control in core or mask shooting machines, wherein molding material by means of a shooting device in an openable Tool shot and there solidified into a shaped piece - core, mask or the like is, the molding is removed with the tool open, wherein the fitting with the tool open and / or during removal and / or is measured without contact after removal, the measured values on a computer supplied, where necessary processed and compared with stored setpoints and the shaped piece when determining a predefinable or definable deviation of the target values is identified as a committee.
  • the present invention relates to the field of foundry technology.
  • foundry cores or - Form mostly made in separate parts, merged and together a mold or connected to a core package.
  • These core packages are then for producing a metallic workpiece with molten metal, for example filled, with those to be filled with molten metal in series production Core packages lined up in a row through the production line.
  • a faulty core If a faulty core has been used, it can be used for Pour the emerging scrap only hours after the core is made. Again, it should be a systematic, recurring defect act on the core, until the defect on the cast part would be recognized hours of rejects are produced.
  • Those responsible for this committee Defective cores can indicate defects in the core shooter tool and on the other hand damage to the handling of the cores, during transport of the cores or when packaging the cores. In any case is it not justifiable to make mistakes and thus the committee only after the casting or to be able to determine when inspecting the cooled castings.
  • a core and mask shooting machine is also known from DE 44 34 798 A1, in which at least a visual inspection of the tool is provided.
  • the visual control discussed in DE 44 34 798 A1 is not practicable, especially as part of a fully automated production the tool cannot be observed continuously.
  • a specialist constantly uses the tool, i.e. after each shot, watch. Also if such a visual observation or control were carried out, would remain the fate of an ejected core that is to be transported further, because - As already mentioned before - also in the manipulation of the cores, in the transfer the cores or even defects in the packaging of the cores may occur.
  • a generic method is known from DE-U-94 16 307.3, namely a Process for quality control in core or mask shooting machines, where this document generally relates to the production of molded parts by means of a Molding plant relates.
  • Test methods for molded parts known where the molded parts with regard to their quality, namely in terms of surface quality, weight, location of the Focus, etc. can be checked in different ways.
  • a scale is used to determine the weight.
  • the determined data are processed according to the known method of an evaluation device fed so that a comparison of the detection result with one or several setpoints can take place. Finally, according to the known method a control device is used to influence the production of Moldings based on the evaluation result. Ultimately, good parts of Bad parts are separated and the system becomes frequent when Bad parts shut down for maintenance or repair purposes. To the known method, only the fittings with regard to their Quality examined. It is only determined whether the fittings of the the required quality or not. In the case of the identification of bad parts However, it can not be determined whether the deviation of the fittings from predeterminable Setpoints on the actual production, for example on the tool, or on handling during removal from the tool or on the subsequent transport or the subsequent handling of the fittings is due. Ultimately, there is nothing left here other than when you find it from bad parts the entire path of the fitting to the tool retrace and track down the source of the error - usually with difficulty. Here the entire system must be shut down.
  • the present invention is based on the object of a method for quality control in core or mask shooters, after which reject parts recognized and a - systematically - repeating committee prevented can be. It should be possible to determine the reason for the committee.
  • the method according to the invention achieves the above object through the features of claim 1. Thereafter, a generic method is thereby characterized that to check the tool, the target values of the tool immediately before or after shooting a piece identified as a good part determined on the tool, processed if necessary and stored in the memory via the computer become.
  • a method for quality control in core or mask shooting machines specified does not only include verification the fitting itself, as is known from DE-U-94 16 307.3. Rather, the tool is checked in the manner according to the invention, in such a way that the nominal values of the tool before or after the Shooting a molded part identified as a good part directly on the tool will be determined. In other words, this means that after the determination is made or determination of a shaped part designated as a good part, the tool condition, who was or is responsible for the production of the good part, as duly Setpoint of the tool is identified or recorded. These values will be prepared or processed in the computer and in a special memory as setpoints filed. To assess the condition of the tool, the respective determined values compared with the target values, which now also an immediate Assessment of the condition of the tool over the entire manufacturing period is possible.
  • the tool can be used immediately inferred, because in such a case the review of the tool - inevitably - a deviation from the previously determined target values of the tool results. It can consequently be unambiguously in the manner according to the invention determine whether the manufacture of an inadequate fitting is due to an error or a defect in the tool. Otherwise, the cause can only be still in improper handling of the fitting after proper Manufacture lie.
  • the setpoints of the items to be monitored in terms of quality are advantageous Form piece determined on a "good part", with the same device, with which the quality control takes place.
  • the measured values obtained are prepared in the computer to setpoints and in a memory provided for this purpose filed. They are used in the subsequent measurements of fittings the measured values determined are compared with the previously stored target values. It would be the same however, it is also conceivable to enter the target values on the basis of predetermined technical data or to calculate the surface profile of the fittings.
  • Every shot fitting could now be carried out when carrying out the quality control be measured so that the transfer of a defective fitting on is avoided in any case.
  • To reduce the control effort, especially for Reduction of the computing time and to avoid a negative influence of the Quality control on the cycle time could only be done using a random number generator selected fittings are measured.
  • Every nth shot The shaped part can be measured, the parameter n in turn being predefinable or is adjustable. As is known, tools wear out or after one certain service life need to be cleaned, parameter n could be used increasing tool life - automatically - decrease so that shortly before a tool change almost every fitting or even every fitting is measured.
  • the fitting could - after delivery by the manipulator or immediately after the core shooter - a conveyor and fed by the conveyor over a conveyor line to a transfer or Processing station are brought. It would also be very special here Advantage if the fitting before, during or after reaching the handover or Processing station and, if necessary, is measured without contact after processing. Also the same statements apply here and the same measures can be taken as when measuring in the area of the core shooter.
  • the fitting could be used together with other fittings to be assembled into a form or core package.
  • the tool can be measured after removal each shot fitting. It would also be conceivable that Measurement of the tool after removal of every nth shot fitting undertake, the parameter n being arbitrary. With increasing The service life of the tool could be parameter n automatically can be reduced so that the shortly before a given tool change Tool checked or measured after almost every shot becomes.
  • quality control could the computer could design the detection device in this way control that preferably immediately before, during or after the removal of the Form piece from the tool, the tool is measured, taking a measurement of the tool is only possible to a limited extent before the shaped part is removed. In any case the discovery of a defective fitting should be checked immediately of the tool.
  • the tool as a whole could be measured.
  • the non-contact measurement of both the fittings and the tools can be done using different techniques.
  • the molded parts made of molded materials by means of a capacitive working Sensor technology - contactless - to scan.
  • the capacitive sensors also an inductive or on the eddy current principle working sensors.
  • the measurement could also be carried out using an ultrasound sensor system or by means of an optically operating sensor system.
  • To apply one Adequate illumination is required for optically operating sensors.
  • the Use of a video camera with downstream optical image processing after which namely the gray and / or color levels of recorded video images of the monitoring part with the recorded and already saved Gray levels and / or color levels of a "good part" are compared.
  • Gray levels and / or color levels of a "good part” are compared.
  • On this Weg is a comparison of the surface structures and thus quality monitoring possible.
  • the inventive method discussed above can be with the help of a Use device that a detection device for contactless measurement the fitting with the tool open and / or while removing the Has molding and / or after removal of the molding.
  • the device includes a computer for controlling the detection device and for recording, processing or processing the measured values and for comparison of the processed measured values with setpoints of the stored in a memory Fitting. The same applies to a measurement of the tool.
  • the detection device does not only include tools in the area of the tool the core shooter detectors, but also on downstream manipulators, Conveyors, transfer and processing stations.
  • the detectors are preferably movable and / or rotatable, so that - ideally - scanning the surface of the molded piece to be tested or the one to be monitored Tool is possible.
  • the single figure shows a schematic representation - in the form of a block diagram - Three core shooters 1 arranged side by side, each with two-part tools 2.
  • the core shooters 1 are different Cores 3 shot, which packets in a downstream station to form a core package become. After opening the tools 2, the cores 3 are only removed by means of a indicated manipulator 4 from the actual core shooter 1 removed and - immediately after removal - measured without contact.
  • CCD cameras 5 used that digitized the captured image - one Feed computer 6.
  • There the gray or color values of the shot Core 3 processed image and over usual in image processing Image recognition programs compared with target values.
  • the Core 3 identified as a committee and - again using manipulators - separated out.
  • all fittings can or cores 3 and the tools 2 are monitored or measured.
  • a selection of the cores 3 to be detected is arbitrary on the basis Rules possible.
  • a partial measurement of the cores 3 and the tool 2 is also conceivable.
  • a core station 1 is followed by a transfer station 8, from which the cores 3 are packaged. Also at the transfer station 8 Cores 3 optically measured, that is to say during transport or during handover To be able to determine damage.
  • another detection device 9 provided with CCD cameras as detectors.
  • the transfer station 8 are manipulators, not shown in the figure, and one Subsequent conveyor route, the packaging of the individual cores 3 to connects a core package 10. Every single step of packaging is in turn monitored by a detection device 11 so that there damaged cores 3 recognized and - via manipulators - separated out.
  • a review of the core package 10 takes place, here multiple detection options or multiple detection methods also simultaneously Can find application.
  • capacitive sensors Check the wall thicknesses of the core packages or sources of errors in the effectively exclude later casting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Factory Administration (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Refuse Collection And Transfer (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Claims (11)

  1. Procédé de contrôle de qualité dans les machines à tirer les noyaux ou les carapaces (1), où un matériau de formage est, au moyen d'un dispositif de tirage, tiré dans un outil (2) pouvant être ouvert et y est solidifié en une pièce de moulage (3) - un noyau, une carapace ou similaire - où la pièce de moulage (3) est prélevée lorsque l'outil (2) est ouvert et/ou la pièce de moulage est pendant le prélèvement et/ou après le prélèvement mesurée sans contact, les valeurs de mesure étant injectées dans un ordinateur (6) et y étant le cas échéant traitées et comparées à des valeurs de consigne mises en mémoire et où la pièce de moulage (3) est identifiée en tant que rebut dans le cas où il est détecté un écart réglable ou définissable par rapport aux valeurs de consigne,
    caractérisé en ce que pour le contrôle de l'outil (2), les valeurs de consigne de l'outil (2) sont, avant ou après le tirage d'une pièce de moulage (3) qualifiée de bonne, directement déterminées sur l'outil (2), sont le cas échéant traitées et sont par l'intermédiaire de l'ordinateur (6) mises en mémoire.
  2. Procédé suivant la revendication 1, caractérisée en ce que les valeurs de consigne de la pièce de moulage (3) sont déterminées avec référence à une pièce qualifiée de bonne et sont par l'intermédiaire de l'ordinateur (6) mises en mémoire.
  3. Procédé suivant la revendication 1 ou 2, caractérisé en ce que chaque pièce de moulage (3) tirée ou uniquement les pièces de moulage (3) choisies par un générateur de hasard sont mesurées.
  4. Procédé suivant la revendication 1 ou 3, caractérisé que chaque n-ième pièce de moulage tirée (3) est mesurée et en ce que le paramètre n est choisi à volonté, et en ce que la valeur du paramètre n diminue lorsque la durée d'utilisation de l'outil (2) augmente.
  5. Procédé suivant l'une quelconque des revendications de 1 à 4, où la pièce de moulage (3) est saisie par un manipulateur (4) et est par le manipulateur (4) transportée vers un poste de transfert ou de travail (8), caractérisé en ce que la pièce de moulage (3) est mesurée sans contact avant, pendant ou après le transport vers le poste de transfert ou de travail (8).
  6. Procédé suivant l'une quelconque des revendications de 1 à 5, où la pièce de moulage (3) est au moyen d'une installation de transport et le long d'une voie de transport transportée vers un poste de transfert ou de travail (8), caractérisé en ce que la pièce de moulage (3) est mesurée sans contact avant, pendant ou après son arrivée au poste de transfert ou de travail (8).
  7. Procédé suivant l'une quelconque des revendications de 1 à 6, où pièce de moulage (3) est conjointement avec d'autres pièces de moulage (3) réunie en un paquet (10), caractérisé en ce que la pièce de moulage (3) ou les pièces de moulage (3) déjà paquetées est/sont, avant, pendant et/ou après chaque opération de paquetage, mesurée(s) sans contact.
  8. Procédé suivant l'une quelconque des revendications de 1 à 7, caractérisé en ce qu'une mesure de l'outil (2) a lieu après prélèvement de chaque pièce de moulage (3) tirée ou après prélèvement de chaque n-ième pièce de moulage (3) tirée et en ce que le paramètre n peut être choisi à volonté.
  9. Procédé suivant l'une quelconque des revendications de 1 à 7, caractérisé en ce qu'en cas de détection d'un défaut sur la pièce de moulage (3), et de préférence immédiatement avant, pendant ou après le prélèvement de la pièce de moulage (3) de l'outil (2), l'outil est mesuré (2), cet outil (2) étant mesuré dans son ensemble, ou bien lorsque le défaut sur la pièce de moulage (3) peut être attribué à la région correspondante de l'outil (2), seule cette région de l'outil (2) est mesurée.
  10. Procédé suivant la revendication 8 ou 9, caractérisé en ce que dans le cas d'une détection d'un défaut sur l'outil (2), un remplacement d'outil est automatiquement induit.
  11. Procédé suivant l'une quelconque des revendications de 1 à 10, caractérisé en ce que la mesure sans contact des pièces de moulage (3) et le cas échéant des outils (2) a lieu au moyen d'un système de capteurs fonctionnant par voie capacitive ou le cas échéant par induction ou suivant le principe des courants de Foucault, au moyen d'un système à ultrasons, d'un système de captage optique ou au moyen d'une caméra vidéo (5) et traitement optique de l'image.
EP96944559A 1995-09-20 1996-09-20 Procede de controle qualite dans des machines a tirer les noyaux ou les carapaces Expired - Lifetime EP0853516B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19534984A DE19534984C1 (de) 1995-09-20 1995-09-20 Verfahren zur Qualitätskontrolle in Kern- oder Maskenschießmaschinen und Vorrichtung zum Kern- oder Maskenschießen
DE19534984 1995-09-20
PCT/DE1996/001796 WO1997010909A2 (fr) 1995-09-20 1996-09-20 Procede de controle qualite dans des machines a tirer les noyaux ou les carapaces et dispositif pour le tirage des noyaux ou des carapaces

Publications (2)

Publication Number Publication Date
EP0853516A2 EP0853516A2 (fr) 1998-07-22
EP0853516B1 true EP0853516B1 (fr) 2000-01-26

Family

ID=7772711

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96944559A Expired - Lifetime EP0853516B1 (fr) 1995-09-20 1996-09-20 Procede de controle qualite dans des machines a tirer les noyaux ou les carapaces

Country Status (7)

Country Link
US (1) US5996681A (fr)
EP (1) EP0853516B1 (fr)
JP (1) JP2000515067A (fr)
CA (1) CA2232404C (fr)
DE (2) DE19534984C1 (fr)
ES (1) ES2143256T3 (fr)
WO (1) WO1997010909A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006009320A1 (de) * 2006-03-01 2007-09-06 Halberg-Guss Gmbh Verfahren und Vorrichtung zur Überwachung der Prozessbedingungen bei einem Gießprozess

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19535337C2 (de) * 1995-09-22 1999-05-20 Adolf Hottinger Kg Verfahren zur Qualitätskontrolle bei der Herstellung gießfertiger Masken oder Kernpakete
US6422296B1 (en) * 1996-11-04 2002-07-23 Hottinger Maschinenbau Gmbh Apparatus for making ready-to-pour shells or core assemblies
DE19725379C2 (de) * 1996-11-04 2000-05-04 Adolf Hottinger Kg Vorrichtung und Verfahren zur Herstellung gießfertiger Masken oder Kernpakete
EP1141682B1 (fr) 1998-12-21 2016-04-13 HOS Hottinger Systems GbR Procede et dispositif de reconnaissance d'objet
ITTO20020556A1 (it) * 2002-06-26 2003-12-29 Fiat Ricerche Metodo di rilevazione del grado di compattezza di materiali granulari,e relativo sensore per tale rilevazione
JP2007278915A (ja) * 2006-04-10 2007-10-25 Tateyama Machine Kk 工具欠陥検査装置と工具欠陥検査方法

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
GB2036976A (en) * 1978-11-16 1980-07-02 Rolls Royce Inspection of electrically non-conductive workpieces
US4248290A (en) * 1979-08-06 1981-02-03 The Osborn Manufacturing Corporation Foundry molding machine and method
DE3148461C1 (de) * 1981-12-08 1983-04-14 Adolf Hottinger, Gießerei und Maschinenbau GmbH, 6800 Mannheim Kern- und Maskenschießmaschine
JP2686648B2 (ja) * 1989-05-16 1997-12-08 アイシン高丘株式会社 砂型変形検査装置
JP2686649B2 (ja) * 1989-05-16 1997-12-08 アイシン高丘株式会社 砂型変形検査装置
JPH07239322A (ja) * 1993-04-21 1995-09-12 Mas Fab Gustav Eirich 型砂の成型特性を確定する方法と装置
DE4334117C2 (de) * 1993-10-07 1997-01-30 Hottinger Adolf Masch Vorrichtung zum Füllen von Schußköpfen
DE4434798A1 (de) * 1993-10-14 1995-05-11 Georg Fischer Giesereianlagen Kern- und Maskenschiessmaschine
WO1995015231A1 (fr) * 1993-12-03 1995-06-08 Adolf Hottinger Maschinenbau Gmbh Dispositif et procede pour la fabrication de carapaces ou paquets de noyaux de fonderie prets a l'emploi
DE19527147A1 (de) * 1994-10-10 1996-04-11 Laeis & Bucher Gmbh Verfahren und Vorrichtung zur Qualitätsprüfung von Formteilen
DE9416307U1 (de) * 1994-10-10 1994-11-24 Laeis + Bucher GmbH, 54290 Trier Prüfvorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006009320A1 (de) * 2006-03-01 2007-09-06 Halberg-Guss Gmbh Verfahren und Vorrichtung zur Überwachung der Prozessbedingungen bei einem Gießprozess

Also Published As

Publication number Publication date
DE59604324D1 (de) 2000-03-02
CA2232404C (fr) 2007-12-04
DE19534984C1 (de) 1996-08-14
US5996681A (en) 1999-12-07
JP2000515067A (ja) 2000-11-14
ES2143256T3 (es) 2000-05-01
CA2232404A1 (fr) 1997-03-27
WO1997010909A3 (fr) 1997-09-12
EP0853516A2 (fr) 1998-07-22
WO1997010909A2 (fr) 1997-03-27

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