EP0659504B1 - Verfahren zur Nachpositionierung eines Giesssystems bei einem ballenpressenden Form- und Fördersystem - Google Patents
Verfahren zur Nachpositionierung eines Giesssystems bei einem ballenpressenden Form- und Fördersystem Download PDFInfo
- Publication number
- EP0659504B1 EP0659504B1 EP94118953A EP94118953A EP0659504B1 EP 0659504 B1 EP0659504 B1 EP 0659504B1 EP 94118953 A EP94118953 A EP 94118953A EP 94118953 A EP94118953 A EP 94118953A EP 0659504 B1 EP0659504 B1 EP 0659504B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pouring
- measuring zone
- casting
- bale
- deviation
- 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
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
Definitions
- the invention relates to a method for repositioning of a casting system with a baling press Forming and conveying system according to the preamble of the claim 1.
- Such a method for repositioning a casting system with a baling form and conveyor system known from DE 42 02 020 A1.
- a pouring hopper that is on a conveyor system Mold arranged.
- the position of the bottom hole above the Casting funnel is checked and the position deviations are recorded as soon as a forming and conveying process of a
- the shape bale is finished and the shape bale is at rest.
- a position change only takes place after the end Pouring process and during the next molding and conveying process a bale of form.
- a device and a method are known from EP 02 65 206 B1 to regulate the casting of molten metal known in individual molds, with image-area information during predetermined sampling intervals for a casting process can be created.
- Adjustment means for adjustment the flow of the molten metal speak to difference values between captured image area information and reference area values. Every regulation value a function of the difference value for its assigned Sampling interval and a regulating preset value for this sampling interval based on preselected Casting parameters from at least one previous one Casting process.
- EP 02 69 591 B1 describes a method for controlling the Pouring a molten metal into molds known in the a palpation of the top of the molds during their progressive movement takes place to the casting station Determine pouring funnel. The remaining distance of the respective mold up to the casting station is determined. The watering kettle will based on the determination of the particular mold distance to be covered in a position exactly above the End position of this mold moved in the casting station.
- DE-A-41 03 243 describes a method for controlling the Pouring a liquid from a jar into individual ones Casting molds known.
- a system observes by means of a Camera the actual level of the molten metal in the Casting funnel of the casting mold in the course of a casting process.
- the camera can be placed on a surface at the top of the Mold around the sprue, so that spilling or splashing of melted Metal is detected when casting.
- the invention has for its object a method for Repositioning a casting system for a baling press Forming and conveying system of the type mentioned at the beginning specify where incorrect measurements are excluded and Any measurement inaccuracies that occur are eliminated.
- the advantages that can be achieved with the invention are in particular in that the method does not require any additional equipment in addition to the level control.
- baling form and conveyor systems in general referred to as boxless molding lines
- position of the casting device necessary for casting as Sum of all bale thicknesses between the molding line and the pouring hopper the mold in the casting position.
- the thickness of the individual bales varies depending on the nature of the molding sand etc. absolutely by a few millimeters. This results in a series of identical models of From time to time the need to reposition the casting system, when the pouring funnel position no longer matches the Position of the pouring device matches.
- the position of the pouring funnel is used to determine the pouring position of the mold bale relative to the pouring system position determine. This measurement takes place during casting. Subsequently is the deviation of the real casting position from the desired one Determine casting position. In conclusion if necessary, the change in position of the casting system according to the result of the above step. This happens after the casting has taken place.
- FIG. 1 is a system for positioning a casting system with a baling form and conveyor system shown.
- bales 1 recognize that form molds with pouring funnels.
- the shape bales 1 become a casting system via a conveyor system 3 4 transported.
- a stopper control 5b is used for actuation of the plug, i.e.
- the signals from the video camera 6 arrive at an image evaluation 7, the entire video image during the casting process (see section 12 according to FIG. 2) optically processed and made the visible liquid metal surface (see B according to figure 2) determines the current liquid metal height in the casting funnel and feeds the stop control 5b.
- the current liquid metal height in the pouring funnel is the one in the video image recognizable pouring stream (see number 15 according to figure 2) hidden in order to avoid falsification of measured values. In this way, the casting performance of the casting system becomes automatic adapted to the swallowing capacity of the mold.
- a measuring zone (see number 16 according to FIG. 2) is defined in such a way that e.g. one correctly over the pouring funnel positioned the casting system the visible surface of the bale within the measuring zone (see C according to FIG. 2) visible liquid metal surface in the casting funnel inside corresponds to the measuring zone (see D according to FIG. 2).
- a deviation from the original defined area ratio between visible Mold bale surface in the measuring zone and more visible Liquid metal surface in the measuring zone is solid, so this is Deviation is a measure of the deviation between the position the bottom hole of the pouring system and the position of the pouring funnel the mold.
- Area measurement is a control system from a histogram evaluation 8 for the measuring zone, an area evaluation 9, a measured value weighting 10 and a position calculation 11 for the coordinate specification the positioning system 5a supplied.
- an area assessment is used 9 from the area ratio between the visible surface of the bale in the measuring zone and visible liquid metal surface the deviation of the current one in the measuring zone Actual pouring position of the pouring system from the position of the pouring funnel determined.
- the Position calculation 11 corresponding coordinate signals are calculated and to the positioning system 5a of the casting system 4 given.
- the position calculation 11 lies for this purpose, for example correlations between the Area ratios and the coordinates for repositioning in front. It is also possible that the repositioning exclusively on-line in the sense of a "self-learning Systems "is done by for the procedure of Casting system a predetermined distance (or a predetermined Time for the operation of the casting system drives) is and in the subsequent measuring intervals Effects of these requirements are evaluated, i.e. it will checks whether there is a deviation between the casting system position and pouring funnel position reduced to the desired extent Has. Depending on the result of these evaluations if necessary, a correction is made to the specified Distances (or the specified time).
- the direction for repositioning the casting system leaves easily determine which of the areas has increased within the measuring zone.
- FIG. 2 is a for mold level control and repositioning of the casting system shown video image.
- the visible bale surface is marked with A designated.
- the dashed indicated pouring jet 15 is hidden.
- the Measuring zone 16 is e.g. defined such that when correct Pouring funnel position below the bottom hole of the pouring system the visible bale surface C within the Measuring zone equal to the visible liquid metal surface D is within the measuring zone.
- the Direction of transport of the conveyor system is marked with x.
- FIG 3 a video image is shown in which the location of the pouring funnel is changed, i.e. the pouring funnel rim 14 and the visible liquid metal surface B are inside of the video image 12 "hiked" upwards.
- the liquid metal height in the casting funnel this change is not a measurement error.
- the visible liquid metal surface D is inside the measuring zone 16 is significantly smaller than the visible surface of the molded bale C within the measuring zone. From the relationship from D to C you can see the deviation between the casting system position and determine the funnel position.
- FIG. 4 shows a video image in which the liquid metal surface and dirty the bale surface are.
- FIG 5 a video image is shown in which the pouring funnel is not yet filled with liquid metal. There are the pouring funnel edge 14, the pouring jet 15 and the measuring zone 16 recognizable. It is also advantageous if the filling is not yet filled Pouring funnel a perfect measurement of the shape of the bale surface C and liquid metal surface D within the Measuring zone ensured because the pouring jet 15 with respect the y coordinate (transverse direction to the transport direction x) in The center of the image is located and its width b is larger than the width a is the measuring zone 16.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Devices For Molds (AREA)
Description
- Figur 1
- eine Anlage zur Positionierung eines Gießsystems bei einem ballenpressenden Form- und Fördersystem,
- Figur 2
- ein zur Gießspiegelregelung und Nachpositionierung des Gießsystems herangezogenes Videobild,
- Figur 3
- ein Videobild, bei dem die Lage des Gießtrichters verändert ist,
- Figur 4
- ein Videobild, bei dem die Flüssigmetalloberfläche und die Ballenoberfläche verschmutzt sind,
- Figur 5
- ein Videobild, bei dem der Gußtrichter noch nicht gefüllt ist.
Claims (2)
- Verfahren zur Nachpositionierung eines Gießsystems bei einem ballenpressenden Form- und Fördersystem, wobei die Abweichung zwischen der Position des Bodenlochs eines Gießsystems und der Position des Gießtrichters einer Gußform während des Gießens ermittelt und nach erfolgtem Abguß die Position des Gießsystems entsprechend dieser Abweichung verändert wird, wenn die Abweichung einen Toleranzwert überschreitet, dadurch gekennzeichnet, daß in einem zur Ermittlung der Flüssigmetallhöhe im Gießtrichter für eine Gießspiegelregelung dienenden Videobild (12) eine Meßzone (16) derart definiert wird, daß bei einem korrekt über einem Gießtrichter positionierten Gießsystem das Flächenverhältnis zwischen der sichtbaren Formballenoberfläche (C) innerhalb der Meßzone und der sichtbaren Flüssigmetalloberfläche (D) innerhalb der Meßzone einem vorgebbaren Faktor entspricht und indem bei erneuten Messungen festgestellte Abweichungen der Flächenverhältnisse vom vorgebbaren Faktor als Maß für die Abweichung zwischen Gießsystemposition und Gießtrichterposition herangezogen werden, wobei die Breite (a) der Meßzone (16) schmaler als die Breite (b) des Gießstrahles (15) ist, daß das Ergebnis einem Kontrollsystem, bestehend aus einer Histogrammauswertung (8) für die Meßzone, einer Flächenbewertung (9), einer Meßwertgewichtung (10) und einer Positionsberechnung (11) für die Koordinatenvorgabe an das Positioniersystem (5a) zugeführt wird, wobei mittels der Histogrammauswertung (8) die Verteilung der Formballenoberfläche (C) und/oder der Flüssigmetalloberfläche (D) innerhalb der Meßzone (16) überprüft wird, um eventuelle Verunreinigungen der Formballenoberfläche und/oder der Flüssigmetalloberfläche zu ermitteln und wobei für die Positionierung des Gießsystems nicht ausschließlich die einzelne, gerade aktuelle Messung, sondern unter Einsatz der Meßwert-Gewichtung (10) sowohl die aktuelle Messung als auch mehrere zurückliegende Messungen mit gleicher oder unterschiedlicher Gewichtung berücksichtigt werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Koordinaten für die Nachpositionierung mittels off-line bestimmter Zusammenhänge zwischen Abweichungen des Flächenverhältnisses zwischen Formballenoberfläche (C) und Flüssigmetalloberfläche (D) innerhalb der Meßzone (16) und Abweichung zwischen Gießsystemposition und Gießtrichterposition bestimmt werden.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4341593A DE4341593A1 (de) | 1993-12-07 | 1993-12-07 | Verfahren zur Nachpositionierung eines Gießsystems bei einem ballenpressenden Form- und Fördersystem |
DE4341593 | 1993-12-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0659504A2 EP0659504A2 (de) | 1995-06-28 |
EP0659504A3 EP0659504A3 (de) | 1996-12-18 |
EP0659504B1 true EP0659504B1 (de) | 1999-01-20 |
Family
ID=6504326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94118953A Expired - Lifetime EP0659504B1 (de) | 1993-12-07 | 1994-12-01 | Verfahren zur Nachpositionierung eines Giesssystems bei einem ballenpressenden Form- und Fördersystem |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0659504B1 (de) |
DE (2) | DE4341593A1 (de) |
DK (1) | DK0659504T3 (de) |
ES (1) | ES2130337T3 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE182494T1 (de) * | 1995-06-07 | 1999-08-15 | Inductotherm Corp | Videosystem zur positionierung einer giesspfanne |
CN113770340A (zh) * | 2021-08-26 | 2021-12-10 | 山东创新金属科技有限公司 | 一种用于铝合金铸造的自动化控制*** |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4744407A (en) * | 1986-10-20 | 1988-05-17 | Inductotherm Corp. | Apparatus and method for controlling the pour of molten metal into molds |
US4724894A (en) * | 1986-11-25 | 1988-02-16 | Selective Electronic, Inc. | Molten metal pour control system |
DE4103243A1 (de) * | 1990-02-21 | 1991-08-29 | Inductotherm Corp | Verfahren zur steuerung des giessens einer fluessigkeit aus einem gefaess in einzelne gussformen sowie einrichtung zur durchfuehrung des verfahrens |
DE4202020A1 (de) * | 1992-01-25 | 1993-07-29 | Abb Patent Gmbh | Verfahren und anordnung zur positionierung eines giesssystems bei einem ballenpressenden form- und foerdersystem |
-
1993
- 1993-12-07 DE DE4341593A patent/DE4341593A1/de not_active Withdrawn
-
1994
- 1994-12-01 EP EP94118953A patent/EP0659504B1/de not_active Expired - Lifetime
- 1994-12-01 DE DE59407694T patent/DE59407694D1/de not_active Expired - Lifetime
- 1994-12-01 DK DK94118953T patent/DK0659504T3/da active
- 1994-12-01 ES ES94118953T patent/ES2130337T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59407694D1 (de) | 1999-03-04 |
DE4341593A1 (de) | 1995-06-08 |
EP0659504A3 (de) | 1996-12-18 |
DK0659504T3 (da) | 1999-09-13 |
EP0659504A2 (de) | 1995-06-28 |
ES2130337T3 (es) | 1999-07-01 |
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