EP1481748A1 - Appareil et procédé de coulée de métal - Google Patents

Appareil et procédé de coulée de métal Download PDF

Info

Publication number
EP1481748A1
EP1481748A1 EP04010438A EP04010438A EP1481748A1 EP 1481748 A1 EP1481748 A1 EP 1481748A1 EP 04010438 A EP04010438 A EP 04010438A EP 04010438 A EP04010438 A EP 04010438A EP 1481748 A1 EP1481748 A1 EP 1481748A1
Authority
EP
European Patent Office
Prior art keywords
filling
level
stability limit
casting mold
melt
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.)
Granted
Application number
EP04010438A
Other languages
German (de)
English (en)
Other versions
EP1481748B1 (fr
Inventor
Wolfgang Dr. Blümlhuber
Johann Wolf
Andreas Sachsenhauser
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1481748A1 publication Critical patent/EP1481748A1/fr
Application granted granted Critical
Publication of EP1481748B1 publication Critical patent/EP1481748B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/08—Controlling, supervising, e.g. for safety reasons

Definitions

  • the invention relates to a metal casting installation, and in particular to a low-pressure casting system, as well as a metal casting process, according to the The preamble of claim 1 and 7 respectively.
  • JP-A-08281414 describes a method for controlling the melt flow known to a die, in which the respective melt inflow to the casting mold on the basis of a constant filling speed calculated from the cross-sectional data of the mold cavity and then time-controlled with the help of a melt pump filling the mold is regulated.
  • density or Viscosity fluctuations caused by a non-uniform temperature distribution in the mold and cross-sectional tolerances of the mold cavity or other disruptive effects are not taken into account, so that there are significant deviations of the specified filling speed and accordingly The cast part produced in this way can lose quality.
  • the object of the invention is a metal casting plant and a metal casting process of the type mentioned in such a way that a largely arbitrary predetermined, ie not only constant, filling speed of the casting mold high accuracy is maintained.
  • the melt inflow to the casting mold is primarily through a control loop with a predetermined filling speed as a guide value and an opto-electronic fill level control as a measured value, at the same time, however, a pre-programmed level control is on standby carried along in a calculation stage the temporal course of the melt inflow based on the specified filling speed and CAD-based cross-sectional data of the mold cavity are calculated in advance and based on which is always used when the control loop is due to a process unavoidable disturbance of the optical level measurement, for example smoke development due to core gases, works incorrectly.
  • an easily detectable measurement signal stability limit is preferably a predetermined fluctuation range of the measurement signal and / or a sudden, deviation between the control characteristic of the control loop the measured and the predetermined filling speed value selected.
  • the advantages of the invention are particularly evident when, as preferred, the casting mold in a low pressure process into the melt bath pressure-adjustable melting furnace immersed ascending pipe.
  • the increase in furnace pressure is controlled via a pressure control loop below the measurement signal stability limit directly as a function of the control deviation between the measured and specified filling speed value and above the stability limit in accordance with one of the computing level including those that change during the filling process Level difference between the melting furnace and the mold determined control signal regulated.
  • Fig. 1 shows a low-pressure casting system with a melting furnace 1 for filling one at the funnel-shaped end of one immersed in the furnace bath
  • Riser 2 connectable casting mold 3 under the action of a gas pressure p, which has a pressure control circuit 4, consisting of a pressure sensor 5, a pressure regulator 6 and one to a compressed gas storage D connected valve 7, in accordance with a pressure control circuit 4 supplied Control signal is adjusted.
  • the pressure control signal is generated by a combined regulating and control system, primarily through its control loop 8, while the control 9 runs in standby and is only activated when the control circuit 8 is disturbed is.
  • the measuring device of the control circuit 8 consists of an opto-electronic Sensor in the form of a distance laser 10, the respective fill level h the mold 3 from the beginning to the end of the filling process continuously with high Cycle frequency samples.
  • the sensor measurement signal s is in a comparison stage 11 where it entered in the manner described below with a measurement signal stability limit compared and below the stability limit at the actual value input a controller 12 is forwarded.
  • a controller 12 is forwarded.
  • the control deviation between the temporal change in the measurement signal and a corresponding, determined for the measured level h predetermined guide value, which in a setpoint generator 13 in the form of a pre-programmed temporal fill level change, i.e. the course of the filling speed v as Function of the filling height h is saved.
  • the filling speed v is in consideration generally not consistently chosen for high casting quality, but e.g. in the area of thin cast wall thicknesses, where the melt viscosity more noticeable, lowered, so that of the lagging Melt fronts also have a uniform fill level in these areas is maintained.
  • the melt inflow to the mold 3 on the way regulated by the pressure regulator 6 such that the temporal fill level change at the speed value specified for this level is held, i.e. the increase in the furnace pressure p over time is increased, if the measured filling speed meets the specified guide value falls below, and reduced accordingly above the guide value.
  • the measurement signal stability limit is determined by two threshold value detectors 14, 15 the comparison level 11 defined.
  • the threshold detector 14 responds if the measurement signal s exceeds a predetermined fluctuation range, while the threshold detector 15 responds when the difference between the indicated by the sensor 10 and the predetermined filling speed, which is normally corrected by the control loop 8, a predetermined Extent exceeds.
  • the control circuit 8 is deactivated by the comparison stage 11 and the Control 9 switched on, whereupon the furnace pressure p in accordance with the the pressure values calculated in the controller 9 are adjusted.
  • the main component of the controller 9 is a computing stage 16, which as Function of the filling height h stored cross-sectional data of the mold cavity 18 the mold 3 from a data memory 17 via a signal line 19 the current furnace pressure values p from the pressure regulator 6 and via a further signal line 20 receives the level measurement signal s of the sensor 10, as long as it is works trouble-free, and via a - shown in dashed lines in Fig. 1 - Control line is activated by comparison stage 11 when the measurement signal stability limit is exceeded. Furthermore, the computing stage 16 Filling speed values v supplied as a function of the filling time.
  • the calculation takes place on the basis of the initial values h o , h so and p o at the beginning of the filling process and is explained in more detail with reference to FIG. 3 (left diagram).
  • the integration of the filling speed curve v results in the temporal height curve h and, taking into account the cross-sectional data of the data memory 17, the corresponding melt inflow m ,
  • the furnace pressure curve p is calculated in advance as follows: from the cross-sectional data of the mold cavity 18 for each filling height h, the melt volume that has already flowed into the casting mold 3 and thus the melt volume missing in the melting furnace 1 is known.
  • the level 16 does not contain the level h h originally calculated for this time z 1 , but rather the height h z1 measured last by the sensor 10 below the stability limit .
  • the melt and furnace pressure curves, m , p so far shifted in parallel that their values at the measuring height h z1 correspond to the melt flow and furnace pressure values regulated by the control circuit 8 at the time z 1 m z1 and p correspond to z1 , as shown by the dash-dotted lines in the left diagram of FIG. 3.
  • the filling process is continued with the calculated values corrected in this way, i.e. the furnace pressure p is regulated by the calculation stage 16 along the dash-dotted curve section - via the pressure control line 21 shown in dashed lines in FIG. 1 - until the sensor 10 again at the time z 2 works trouble-free, whereupon the calculated values again by the measured and control values , h z2 , m z2 and p z2 , the control circuit 8 are updated, as is shown by the dashed curve of the arithmetic diagram of FIG. 3, and the filling process is now continued in the control mode until the next measurement signal fault.
  • temporal calculation model can be the quality of the castings improve significantly because the filling process is based on a defined, predetermined matched the existing wall thickness and cross-sectional area of the casting Filling speed automatically and largely unaffected by uncontrollable interference effects and accordingly high accuracy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Feedback Control In General (AREA)
  • Control Of Non-Electrical Variables (AREA)
EP20040010438 2003-05-28 2004-04-29 Appareil et procédé de coulée de métal Expired - Fee Related EP1481748B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10324247 2003-05-28
DE2003124247 DE10324247A1 (de) 2003-05-28 2003-05-28 Metallgießanlage und -verfahren

Publications (2)

Publication Number Publication Date
EP1481748A1 true EP1481748A1 (fr) 2004-12-01
EP1481748B1 EP1481748B1 (fr) 2007-10-17

Family

ID=33103625

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040010438 Expired - Fee Related EP1481748B1 (fr) 2003-05-28 2004-04-29 Appareil et procédé de coulée de métal

Country Status (2)

Country Link
EP (1) EP1481748B1 (fr)
DE (2) DE10324247A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2456918A (en) * 2008-02-01 2009-08-05 Smartcast Solutions Ltd Metal casting using varaiable pressure
AT520126A1 (de) * 2017-07-13 2019-01-15 Fill Gmbh Gießvorrichtung zum Gießen unter Druck
CN113333715A (zh) * 2021-05-28 2021-09-03 重庆长安汽车股份有限公司 基于背压力的低压铸造充型压力曲线设计方法
CN115365478A (zh) * 2022-08-12 2022-11-22 中国兵器装备集团西南技术工程研究所 一种复杂金属构件铸造成型用非线性加压控制方法及系统

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1257708A (fr) * 1960-02-22 1961-04-07 Griffin Wheel Co Procédé de moulage sous pression et dispositif pour sa mise en oeuvre
US4047558A (en) * 1974-06-28 1977-09-13 Honsel Werke Aktiengesellschaft Metering device for metal casting machines, particularly low pressure casting machines
US4050503A (en) * 1973-08-16 1977-09-27 Institute Po Metaloznanie I Technologia Na Metalite Apparatus for controlling the rate of filling of casting molds
FR2460170A1 (fr) * 1979-07-04 1981-01-23 Etude Dev Metallurg Procede et dispositif d'automatisation d'un cycle de coulee sur machine basse-pression
JPS61245955A (ja) * 1985-04-22 1986-11-01 Toshiba Corp 鋳造における溶湯の流速制御方法
EP0378155A1 (fr) * 1989-01-10 1990-07-18 Cosworth Casting Processes Ltd. Contrôle de la position d'un métal liquide dans un récipient
EP0624413A1 (fr) * 1993-05-10 1994-11-17 Pierre Merrien Procédé de coulée pilotée sous basse pression d'un moule sous vide pour alliages d'aluminium ou de magnésium et dispositif pour sa mise en oeuvre
JPH08257684A (ja) * 1995-03-24 1996-10-08 Honda Motor Co Ltd 金型鋳造方法
JPH08281414A (ja) * 1995-04-07 1996-10-29 Toshiba Mach Co Ltd ダイカストマシンの射出制御方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
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
DE4112753A1 (de) * 1991-04-19 1992-10-22 Mueller Weingarten Maschf Verfahren zur regelung von giessparametern in einer druckgiessmaschine
US5388633A (en) * 1992-02-13 1995-02-14 The Dow Chemical Company Method and apparatus for charging metal to a die cast
DE19622291C1 (de) * 1996-05-23 1997-11-20 Strikfeldt & Koch Verfahren und Vorrichtung zur Überfüllüberwachung
DE19623720B4 (de) * 1996-06-14 2007-10-18 Vaw Alucast Gmbh Verfahren und Vorrichtung zum Steuern der Füllmenge beim Gießen, insbesondere von Aluminiumgußteilen
DE19845528A1 (de) * 1998-04-27 1999-10-28 Junker Gmbh O Verfahren zum Verarbeiten einer Metallschmelze, insbesondere einer Leichtmetallschmelze, sowie gekapselter und mit Schutzgas beaufschlagbarer Dosierofen
AU2429300A (en) * 1998-12-23 2000-07-31 Sms Demag Aktiengesellschaft Method for detecting and controlling the level of liquid metal in an ingot mold
DE10237904B4 (de) * 2002-06-14 2007-05-31 Ifm Electronic Gmbh Elektronischer Sensor und Baueinheit aus einem elektronischen Sensor und einem Befestigungselement

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1257708A (fr) * 1960-02-22 1961-04-07 Griffin Wheel Co Procédé de moulage sous pression et dispositif pour sa mise en oeuvre
US4050503A (en) * 1973-08-16 1977-09-27 Institute Po Metaloznanie I Technologia Na Metalite Apparatus for controlling the rate of filling of casting molds
US4047558A (en) * 1974-06-28 1977-09-13 Honsel Werke Aktiengesellschaft Metering device for metal casting machines, particularly low pressure casting machines
FR2460170A1 (fr) * 1979-07-04 1981-01-23 Etude Dev Metallurg Procede et dispositif d'automatisation d'un cycle de coulee sur machine basse-pression
JPS61245955A (ja) * 1985-04-22 1986-11-01 Toshiba Corp 鋳造における溶湯の流速制御方法
EP0378155A1 (fr) * 1989-01-10 1990-07-18 Cosworth Casting Processes Ltd. Contrôle de la position d'un métal liquide dans un récipient
EP0624413A1 (fr) * 1993-05-10 1994-11-17 Pierre Merrien Procédé de coulée pilotée sous basse pression d'un moule sous vide pour alliages d'aluminium ou de magnésium et dispositif pour sa mise en oeuvre
JPH08257684A (ja) * 1995-03-24 1996-10-08 Honda Motor Co Ltd 金型鋳造方法
JPH08281414A (ja) * 1995-04-07 1996-10-29 Toshiba Mach Co Ltd ダイカストマシンの射出制御方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 011, no. 094 (M - 574) 25 March 1987 (1987-03-25) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 02 28 February 1997 (1997-02-28) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2456918A (en) * 2008-02-01 2009-08-05 Smartcast Solutions Ltd Metal casting using varaiable pressure
AT520126A1 (de) * 2017-07-13 2019-01-15 Fill Gmbh Gießvorrichtung zum Gießen unter Druck
AT520126B1 (de) * 2017-07-13 2020-04-15 Fill Gmbh Gießvorrichtung zum Gießen unter Druck
CN113333715A (zh) * 2021-05-28 2021-09-03 重庆长安汽车股份有限公司 基于背压力的低压铸造充型压力曲线设计方法
CN113333715B (zh) * 2021-05-28 2022-11-04 重庆长安汽车股份有限公司 基于背压力的低压铸造充型压力曲线设计方法
CN115365478A (zh) * 2022-08-12 2022-11-22 中国兵器装备集团西南技术工程研究所 一种复杂金属构件铸造成型用非线性加压控制方法及系统
CN115365478B (zh) * 2022-08-12 2023-08-29 中国兵器装备集团西南技术工程研究所 一种复杂金属构件铸造成型用非线性加压控制方法及系统

Also Published As

Publication number Publication date
DE502004005242D1 (de) 2007-11-29
EP1481748B1 (fr) 2007-10-17
DE10324247A1 (de) 2004-12-16

Similar Documents

Publication Publication Date Title
AT394480B (de) Verfahren zur regelung der elektrodenvortriebsgeschwindigkeit in einem abschmelzelektrodenofen
EP0813701B1 (fr) Systeme de gestion pour installations de l'industrie primaire ou de l'industrie manufacturiere
EP1268110B2 (fr) Procede de regulation et de poursuite en continu d'une position d'un chalumeau de soudage ou d'une tete de soudage
EP1929253A2 (fr) Procede pour commander un dispositif de dosage pour des milieux liquides ou pateux
DE2700003A1 (de) Anlage zur herstellung von strangpressprofilen
DE4338615A1 (de) Verfahren und Vorrichtung zur Führung eines Prozesses in einem geregelten System
EP2817425B1 (fr) Commande de refroidissement
AT413023B (de) Vorrichtung zum regeln des metallspiegels in einer stranggusskokille
DE102015000373A1 (de) Verfahren zur Reduzierung des Energieverbrauchs einer Förderpumpe, die Wasser aus einem Brunnen in ein Leitungsnetz fördert, sowie Anlage zum Fördern von Wasser aus mindestens einem Brunnen in ein Leitungsnetz
WO2015181024A1 (fr) Procédé de remplissage régulé par des robinets
EP1481748B1 (fr) Appareil et procédé de coulée de métal
EP1080809B1 (fr) Méthode pour contrôler la distribution de quantité de métal liquide
EP2376243B1 (fr) Dispositif de détection du débit, et procédé correspondant
EP1481736B1 (fr) Dispositif d'alimentation pour une installation de peinture
EP3554744A1 (fr) Procédé et dispositif de régulation d'une installation de coulée continue
WO2007042170A1 (fr) Procede pour realiser la coulee continue d'une masse de metal en fusion
EP3048305B1 (fr) Réduction de la consommation d'énergie d'une pompe à eau à vitesse variable en tenant compte de la charge instantannée du système
AT392751B (de) Verfahren und vorrichtung zur regelung der abschmelzrate einer elektrode beim elektroschlacken-umschmelzen
EP3173166A1 (fr) Procédé et dispositif de réglage de la largeur d'une barre métallique coulée en continu
DE3009697C2 (fr)
DE19640806A1 (de) Verfahren und Einrichtung zum Gießen eines Stranges aus flüssigem Material
JP3071954B2 (ja) 連続鋳造機の鋳型内湯面レベル制御装置
EP0128280A1 (fr) Procédé de coulée à basse pression et dispositif pour la mise en oeuvre du procédé
DE19633738C2 (de) Verfahren und Einrichtung zum Gießen eines Stranges aus flüssigem Metall
DE102005042336A1 (de) Beschichtungsanlage und zugehöriges Beschichtungsverfahren

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

17P Request for examination filed

Effective date: 20041211

R17P Request for examination filed (corrected)

Effective date: 20041211

17Q First examination report despatched

Effective date: 20050210

AKX Designation fees paid

Designated state(s): DE FR GB IT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20071017

REF Corresponds to:

Ref document number: 502004005242

Country of ref document: DE

Date of ref document: 20071129

Kind code of ref document: P

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20080718

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20110517

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20110428

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20110421

Year of fee payment: 8

Ref country code: DE

Payment date: 20110528

Year of fee payment: 8

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20120429

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20121228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120429

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502004005242

Country of ref document: DE

Effective date: 20121101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120430

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120429

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121101