EP1616643A2 - Anlage zum Füllen einer Form mit geschmolzenem Metall, Vorrichung und Verfahren um den Metalfüllstand zu detektieren - Google Patents

Anlage zum Füllen einer Form mit geschmolzenem Metall, Vorrichung und Verfahren um den Metalfüllstand zu detektieren Download PDF

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Publication number
EP1616643A2
EP1616643A2 EP05356118A EP05356118A EP1616643A2 EP 1616643 A2 EP1616643 A2 EP 1616643A2 EP 05356118 A EP05356118 A EP 05356118A EP 05356118 A EP05356118 A EP 05356118A EP 1616643 A2 EP1616643 A2 EP 1616643A2
Authority
EP
European Patent Office
Prior art keywords
cavity
mold
liquid metal
molten metal
level
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Withdrawn
Application number
EP05356118A
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English (en)
French (fr)
Other versions
EP1616643A3 (de
Inventor
Michel Dussud
Alain Robin
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.)
D'etudes Et De Realisations Techniques Sert Ste
Original Assignee
D'etudes Et De Realisations Techniques Sert Ste
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Publication date
Application filed by D'etudes Et De Realisations Techniques Sert Ste filed Critical D'etudes Et De Realisations Techniques Sert Ste
Publication of EP1616643A2 publication Critical patent/EP1616643A2/de
Publication of EP1616643A3 publication Critical patent/EP1616643A3/de
Withdrawn legal-status Critical Current

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • B22D2/003—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the level of the molten metal

Definitions

  • the present invention relates to a filling installation of a mold with liquid metal, as well as a method for the implementation of this installation.
  • each mold comprises a casting bowl, intended to receive the molten metal, and at least one cavity connected to this bowl via a feed channel. In service, it involves moving each mold towards a casting machine, suitable for pouring molten metal.
  • This casting operation is accompanied by several requirements.
  • the flow rate of metal swallowed by the mold is permanently equal to the flow rate delivered by the casting machine, in order to avoid overflow, as well as any underfeed.
  • the level of metal in the bowl must be controlled, so that it exactly fills the mold, without causing overflow.
  • optical systems which take advantage of a beam directed to the casting bowl to determine the filling level of the casting bowl while throughout the casting.
  • This known solution involves a disadvantage, related in particular to its lack of knowledge of the actual level of filling of the mold during the casting process.
  • the invention aims to provide an installation for controlling, reliably and accurately, the filling of a mold by means of liquid metal.
  • Figures 1 and 2 The installation of Figures 1 and 2 comprises different molds, only one is shown, while being assigned the reference 2.
  • this mold runs below a tank 4, which is filled with a liquid molten metal 6, which is for example cast iron or steel. This metal was poured into the tank 4 in a conventional manner, through a pocket not shown.
  • the bottom of the tank 4 is closed, in known manner, by a shutter 8, also called stopper.
  • the latter can be operated along its main axis, namely vertically in Figure 1, through an actuator 9 of conventional type.
  • Each mold which is of generally parallelepipedic shape, usually comprises a pouring bowl 10, of frustoconical shape, in which flows the molten metal 6 poured from the tank 4.
  • This bowl 10 is extended by a feed channel 12, which opens into at least one cavity 14.
  • FIGS. 1 and 2 also comprises means for determining the evolution of the level of molten metal inside the cavity 14. These are first of all three electromagnetic coils, mounted on a same axis, in this case horizontal.
  • a central transmitting coil 16 adapted to be excited by a sinusoidal electrical signal, whose frequency is a few kilohertz.
  • the coil 16 is connected to a suitable generator 18, of a type known per se.
  • the transmitting coil is associated with two lateral coils, said receivers, one of which is placed in the vicinity of the mold 2.
  • the other receiver coil 22 is placed opposite this mold 2, with respect to the transmitter central coil 16.
  • the coils may be placed above the mold, or near an angle thereof. In this respect, the axis of these coils is then respectively vertical or oblique.
  • the field lines circulating in the vicinity of the first receiver coil 20 are noted. As shown in FIGS. 1 and 2, these lines 24 extend in part, in an area marked 24 ', to the In contrast, the field lines 26, extending in the vicinity of the other receiver coil 22, ie opposite the coil 20, do not interfere with the coil. footprint 14.
  • the three coils 16, 20 and 22 are also connected, via a line 28, to an electronic unit 30, the functions of which will be described in the following.
  • This unit 30 is finally connected, via a control line 32, with the actuator 9.
  • the liquid metal is likely to disturb the electromagnetic field generated by the coils 16, 20 and 22, in particular in the zone 24 'of the field lines 24. Under these conditions, these field lines, which penetrate in part into the interior volume of the cavity, are able to detect the presence of the molten metal in this cavity.
  • the intensity of the aforesaid disturbance increases as the cavity 14 is filled.
  • the electronic unit 30 is able to transform the value of the disturbance undergone by the field lines 24 into an analog signal, which corresponds, for example, to a variation of the voltage as a function of the actual filling level of the cavity 14. The value of this voltage is therefore representative, at each instant, of the level of metal in the footprint.
  • FIG. 3 is a graph illustrating this evolution of the voltage, thus determined by the electronic unit 30, as a function of time.
  • this voltage is zero, which corresponds to the absence of interference of the molten metal with the field lines 24.
  • the voltage increases with increasing time as the impression 14 is filled by the molten metal. This phase of rising of the level of this molten metal corresponds to zone II of this graph.
  • this unit 30 controls the actuator 9, via the line 32. More precisely, if the instantaneous voltage is clearly greater than the reference voltage, at a given moment, it is a question of reducing the flow of molten metal discharged from the tank 4, by lowering or even closing the stopper 8. On the other hand, if this voltage instant is significantly lower than the reference voltage, it is to raise the stopper 8, to increase the flow of molten metal administered from the tank 4.
  • the final phase of the casting of molten metal is carried out as follows. It is first of all to detect the moment at which the level of molten metal reaches a predetermined threshold of the imprint, which is materialized by the reference S, visible in FIG. 2. It can be seen that, at this moment, the voltage shown in FIG. 3 reaches a corresponding value, denoted V s .
  • a latency interval is allowed, which depends on the instantaneous value of the flow of molten metal discharged from the tank 4.
  • the electronic unit 30 controls the actuator 9, so that to cause the closure of the stopper 8, which causes the stop of the supply of molten metal.
  • the range and the sensitivity of the sensor which constitute the three coils 16, 20 and 22, can be adapted according to the characteristics of the mold.
  • the corresponding measuring range inside the mold has a depth of 300 mm on a surface of about 200 mm by 250 mm , centered on the coils.
  • the arrangement of the three coils 16, 20 and 22 is advantageous, since the receiving coils 20 and 22 are mounted in opposition, namely that the coil 20 is adjacent to the mold, while the coil 22 is opposed thereto. .
  • the field lines 24 are disturbed during the rise of the metal, while those 26 do not undergo such a disturbance. Consequently, in a manner known per se, the electronic unit 30 benefits from a differential signal regime, thus making it possible to increase the sensitivity of the measurement.
  • the invention achieves the previously mentioned objectives.
  • the prior art uses an optical measurement in the casting bowl, which is very poor in information since it is not representative of the level of the molten metal in the cavity.
  • a measurement corresponds only to the image of the difference between, on the one hand, the feed rate of the molten metal from the tank 4 and, on the other hand, the instantaneous flow rate swallowed by the mold.
  • the invention takes advantage of a means for detecting the level of the molten metal, able to penetrate into the cavity itself. Therefore, the invention gives a direct character to the measurement thus made, which guarantees a possibility of control of the filling level during a large part of the filling process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
EP05356118A 2004-07-13 2005-07-12 Anlage zum Füllen einer Form mit geschmolzenem Metall, Vorrichung und Verfahren um den Metalfüllstand zu detektieren Withdrawn EP1616643A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0407823A FR2873050A1 (fr) 2004-07-13 2004-07-13 Installation de remplissage d'un moule avec du metal liquide, et procede pour la mise en oeuvre de cette installation

Publications (2)

Publication Number Publication Date
EP1616643A2 true EP1616643A2 (de) 2006-01-18
EP1616643A3 EP1616643A3 (de) 2006-05-17

Family

ID=34948218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05356118A Withdrawn EP1616643A3 (de) 2004-07-13 2005-07-12 Anlage zum Füllen einer Form mit geschmolzenem Metall, Vorrichung und Verfahren um den Metalfüllstand zu detektieren

Country Status (4)

Country Link
US (1) US20060011322A1 (de)
EP (1) EP1616643A3 (de)
CN (1) CN1721105A (de)
FR (1) FR2873050A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016112266A1 (de) * 2016-07-05 2018-01-11 Helmholtz-Zentrum Dresden - Rossendorf E.V. Anordnung zum Charakterisieren des Füllstandes eines elektrisch leitfähigen Materials in einem Behälter

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7828043B2 (en) * 2007-10-09 2010-11-09 Gm Global Technology Operations, Inc. Non-invasive real-time level sensing and feedback system for the precision sand casting process
EP2383056B1 (de) * 2010-04-28 2016-11-30 Nemak Dillingen GmbH Verfahren und Vorrichtung für eine kontaktlose Metallfühlervorrichtung
CN103542953B (zh) * 2013-09-30 2016-03-02 上海交通大学 平板镁合金砂型铸造中砂型温度场的测量方法
CN103871314B (zh) * 2014-04-08 2016-01-20 温州大学 课堂型浇注系统模拟器
CN105108122A (zh) * 2015-08-21 2015-12-02 张继兰 一种能控制流量的自动浇铸机构
CN105081254B (zh) * 2015-09-07 2017-09-26 苏州有色金属研究院有限公司 镁合金半连续铸造所用结晶器的液位控制装置
CN105499495A (zh) * 2016-01-27 2016-04-20 娄底市现代精密铸造有限公司 一种球铁研磨盘砂型无冒口铸造工艺及铸型
CN108838337A (zh) * 2018-08-01 2018-11-20 宁国市挚友合金钢材料有限公司 一种具有浇注高度提醒功能的金属加工模具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366873A (en) * 1966-09-15 1968-01-30 Atomic Energy Commission Usa Linear responsive molten metal level detector
DD142672A1 (de) * 1979-04-10 1980-07-09 Schinkel Hans Georg Verfahren zur galvanischen formfuellungserfassung zur steuerung von metallgiessprozessen
GB2340424A (en) * 1998-08-14 2000-02-23 Didier Werke Ag Stopper rod with detachable nose portion

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3271611D1 (en) * 1981-03-18 1986-07-17 Arbed Method and device for measuring the filling level in continuous-casting moulds
SE460103B (sv) * 1987-03-26 1989-09-11 Asea Ab Anordning foer styrning av gjutfoerlopp
IT1222337B (it) * 1987-10-21 1990-09-05 Ceda Costruzioni Elettromeccan Dispositivo per la misura del livello di metallo liquido in un cristallizzatore per lingottiera per colata continua
JPH01266952A (ja) * 1988-04-18 1989-10-24 Nkk Corp 連続鋳造機の鋳型

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366873A (en) * 1966-09-15 1968-01-30 Atomic Energy Commission Usa Linear responsive molten metal level detector
DD142672A1 (de) * 1979-04-10 1980-07-09 Schinkel Hans Georg Verfahren zur galvanischen formfuellungserfassung zur steuerung von metallgiessprozessen
GB2340424A (en) * 1998-08-14 2000-02-23 Didier Werke Ag Stopper rod with detachable nose portion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016112266A1 (de) * 2016-07-05 2018-01-11 Helmholtz-Zentrum Dresden - Rossendorf E.V. Anordnung zum Charakterisieren des Füllstandes eines elektrisch leitfähigen Materials in einem Behälter

Also Published As

Publication number Publication date
CN1721105A (zh) 2006-01-18
EP1616643A3 (de) 2006-05-17
US20060011322A1 (en) 2006-01-19
FR2873050A1 (fr) 2006-01-20

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