EP0853516B1 - Verfahren zur qualitatskontrolle in kern- oder maskenschiessmaschinen - Google Patents
Verfahren zur qualitatskontrolle in kern- oder maskenschiessmaschinen Download PDFInfo
- 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
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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)
- Injection Moulding Of Plastics Or The Like (AREA)
- Refuse Collection And Transfer (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
Claims (11)
- Verfahren zur Qualitätskontrolle in Kern- oder Maskenschießmaschinen (1), wobei Formstoff mittels einer Schießeinrichtung in ein öffenbares Werkzeug (2) geschossen und dort zu einem Formstück (3) - Kern, Maske oder dgl. - verfestigt wird, wobei das Formstück (3) bei geöffnetem Werkzeug (2) entnommen wird, wobei das Formstück (3) bei geöffnetem Werkzeug (2) und/oder während der Entnahme und/oder nach der Entnahme berührungslos vermessen wird, die Meßwerte einem Rechner (6) zugeführt, dort ggf. aufbereitet und mit gespeicherten Sollwerten verglichen werden und wobei das Formstück (3) bei Ermittlung einer vorgebbaren bzw. definierbaren Abweichung von den Sollwerten als Ausschuß identifiziert wird, dadurch gekennzeichnet, daß zur Überprüfung des Werkzeugs (2) die Sollwerte des Werkzeugs (2) vor oder nach dem Schießen eines als Gut-Teil identifizierten Formstücks (3) unmittelbar an dem Werkzeug (2) ermittelt, ggf. aufbereitet und über den Rechner (6) im Speicher abgelegt werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Sollwerte des Formstücks (3) an einem Gut-Teil ermittelt, ggf. aufbereitet und über den Rechner (6) im Speicher abgelegt werden.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß jedes geschossene Formstück (3) oder lediglich die über einen Zufallsgenerator ausgewählten Formstücke (3) vermessen werden.
- Verfahren nach Anspruch 1 oder 3, dadurch gekennzeichnet, daß jedes n-te geschossene Formstück (3) vermessen wird und daß der Parameter n beliebig vorgebbar ist, wobei mit zunehmender Standzeit des Werkzeugs (2) der Parameter n automatisch verringert wird.
- Verfahren nach einem der Ansprüche 1 bis 4, wobei das Formstück (3) von einem Manipulator (4) erfaßt und durch den Manipulator (4) zu einer Übergabe- oder Bearbeitungsstation (8) verbracht wird, dadurch gekennzeichnet, daß das Formstück vor, während oder nach Abgabe an die Übergabe- oder Bearbeitungsstation berührungslos vermessen wird.
- Verfahren nach einem der Ansprüche 1 bis 5, wobei das Formstück (3) mittels einer Fördereinrichtung über eine Förderstrecke hinweg zu einer Übergabe- oder Bearbeitungsstation (8) verbracht wird, dadurch gekennzeichnet, daß das Formstück (3) vor, während oder nach Erreichen der Übergabe-oder Bearbeitungsstation (8) berührungslos vermessen wird.
- Verfahren nach einem der Ansprüche 1 bis 6, wobei das Formstück (3) gemeinsam mit anderen Formstücken (3) zu einem Formpaket (10) zusammengesetzt wird, dadurch gekennzeichnet, daß das Formstück (3) bzw. die bereits paketierten Formstücke (3) vor, während und/oder nach jedem Paketierungsvorgang berührungslos vermessen wird bzw. werden.
- Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß eine Vermessung des Werkzeugs (2) nach Entnahme jedes geschossenen Formstücks (3) oder nach Entnahme jedes n-ten geschossenen Formstücks (3) erfolgt und daß der Parameter n beliebig vorgebbar ist.
- Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß bei Ermittlung eines Defekts an dem Formstück (3), vorzugsweise unmittelbar vor, während oder nach der Entnahme des Formstücks (3) aus dem Werkzeug (2), das Werkzeug (2) vermessen wird, wobei das Werkzeug (2) insgesamt vermessen wird oder wobei der am Formstück (3) detektierte Defekt dem entsprechenden Bereich am Werkzeug (2) zugeordnet wird und daß nur dieser Bereich des Werkzeugs (2) vermessen wird.
- Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß bei Ermittlung eines Defekts am Werkzeug (2) automatisch ein Werkzeugwechsel eingeleitet wird.
- Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die kontaktlose Vermessung der Formstücke (3) und ggf. der Werkzeuge (2) mittels einer kapazitiv arbeitenden oder ggf. induktiv bzw. nach dem Wirbelstromprinzip arbeitenden Sensorik, mittels einer mit Ultraschall arbeitenden Sensorik, mittels einer optisch arbeitenden Sensorik oder mittels einer Video-Kamera (5) und optischer Bildverarbeitung erfolgt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19534984 | 1995-09-20 | ||
DE19534984A DE19534984C1 (de) | 1995-09-20 | 1995-09-20 | Verfahren zur Qualitätskontrolle in Kern- oder Maskenschießmaschinen und Vorrichtung zum Kern- oder Maskenschießen |
PCT/DE1996/001796 WO1997010909A2 (de) | 1995-09-20 | 1996-09-20 | Verfahren zur qualitätskontrolle in kern- oder maskenschiessmaschinen und vorrichtung zum kern- oder maskenschiessen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0853516A2 EP0853516A2 (de) | 1998-07-22 |
EP0853516B1 true EP0853516B1 (de) | 2000-01-26 |
Family
ID=7772711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96944559A Expired - Lifetime EP0853516B1 (de) | 1995-09-20 | 1996-09-20 | Verfahren zur qualitatskontrolle in kern- oder maskenschiessmaschinen |
Country Status (7)
Country | Link |
---|---|
US (1) | US5996681A (de) |
EP (1) | EP0853516B1 (de) |
JP (1) | JP2000515067A (de) |
CA (1) | CA2232404C (de) |
DE (2) | DE19534984C1 (de) |
ES (1) | ES2143256T3 (de) |
WO (1) | WO1997010909A2 (de) |
Cited By (1)
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)
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 |
WO1998019810A1 (de) * | 1996-11-04 | 1998-05-14 | Hottinger Maschinenbau Gmbh | Vorrichtung und verfahren zur herstellung giessfertiger masken oder kernpakete |
DE19725379C2 (de) * | 1996-11-04 | 2000-05-04 | Adolf Hottinger Kg | Vorrichtung und Verfahren zur Herstellung gießfertiger Masken oder Kernpakete |
JP2002533673A (ja) * | 1998-12-21 | 2002-10-08 | ホッティンガー・マシーンバウ・ゲーエムベーハー | 物体認識方法及び装置 |
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)
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 |
DE59403412D1 (de) * | 1993-12-03 | 1997-08-21 | Hottinger Adolf Masch | Vorrichtung und verfahren zur herstellung giessfertiger masken bzw. kernpakete |
DE9416307U1 (de) * | 1994-10-10 | 1994-11-24 | Laeis + Bucher GmbH, 54290 Trier | Prüfvorrichtung |
DE19527147A1 (de) * | 1994-10-10 | 1996-04-11 | Laeis & Bucher Gmbh | Verfahren und Vorrichtung zur Qualitätsprüfung von Formteilen |
-
1995
- 1995-09-20 DE DE19534984A patent/DE19534984C1/de not_active Expired - Fee Related
-
1996
- 1996-09-20 ES ES96944559T patent/ES2143256T3/es not_active Expired - Lifetime
- 1996-09-20 EP EP96944559A patent/EP0853516B1/de not_active Expired - Lifetime
- 1996-09-20 CA CA002232404A patent/CA2232404C/en not_active Expired - Fee Related
- 1996-09-20 JP JP09512321A patent/JP2000515067A/ja not_active Ceased
- 1996-09-20 WO PCT/DE1996/001796 patent/WO1997010909A2/de active IP Right Grant
- 1996-09-20 US US09/043,587 patent/US5996681A/en not_active Expired - Fee Related
- 1996-09-20 DE DE59604324T patent/DE59604324D1/de not_active Expired - Fee Related
Cited By (1)
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 |
---|---|
EP0853516A2 (de) | 1998-07-22 |
WO1997010909A3 (de) | 1997-09-12 |
DE19534984C1 (de) | 1996-08-14 |
CA2232404C (en) | 2007-12-04 |
CA2232404A1 (en) | 1997-03-27 |
JP2000515067A (ja) | 2000-11-14 |
ES2143256T3 (es) | 2000-05-01 |
US5996681A (en) | 1999-12-07 |
DE59604324D1 (de) | 2000-03-02 |
WO1997010909A2 (de) | 1997-03-27 |
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