EP0656071B1 - Procede et dispositif de regulation de la puissance calorifique d'une installation de recuit au passage de produits metalliques coules en continu - Google Patents

Procede et dispositif de regulation de la puissance calorifique d'une installation de recuit au passage de produits metalliques coules en continu Download PDF

Info

Publication number
EP0656071B1
EP0656071B1 EP93919106A EP93919106A EP0656071B1 EP 0656071 B1 EP0656071 B1 EP 0656071B1 EP 93919106 A EP93919106 A EP 93919106A EP 93919106 A EP93919106 A EP 93919106A EP 0656071 B1 EP0656071 B1 EP 0656071B1
Authority
EP
European Patent Office
Prior art keywords
annealing
value
voltage
measured
section
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
EP93919106A
Other languages
German (de)
English (en)
Other versions
EP0656071A1 (fr
Inventor
Günther PHILLIP
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.)
Maschinenfabrik Niehoff GmbH and Co KG
Original Assignee
Maschinenfabrik Niehoff GmbH and Co 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 Maschinenfabrik Niehoff GmbH and Co KG filed Critical Maschinenfabrik Niehoff GmbH and Co KG
Publication of EP0656071A1 publication Critical patent/EP0656071A1/fr
Application granted granted Critical
Publication of EP0656071B1 publication Critical patent/EP0656071B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00—Process control or regulation for heat treatments
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/62—Continuous furnaces for strip or wire with direct resistance heating

Definitions

  • the present invention relates to a method and a device for regulating the heating power of a resistance annealing system.
  • a continuous resistance annealing system is used to subject metallic extrudates to heat treatment, the term "metallic extrudates” being used here for wire made of ferrous and non-ferrous metals, in particular copper, but also for bundles of parallel, twisted or stranded wires these materials.
  • metallic extrudates being used here for wire made of ferrous and non-ferrous metals, in particular copper, but also for bundles of parallel, twisted or stranded wires these materials.
  • wire is generally used in the following to identify these products.
  • the wire is passed over at least two contact elements which have a different voltage potential, so that a current flows through the wire, which leads to its heating.
  • Rotating rollers are preferably used as contact elements, the peripheral speed of which is substantially equal to the throughput speed of the wire; however, electrolyte baths and metal baths as well as fixed contact elements can also be used.
  • flexible electrical lines generally have copper strands, which are made from individual wires with a diameter of e.g. 0.2 mm can be manufactured. If one or more of these individual wires of the strand breaks during use, not only is the electrical conductivity impaired, but there is in particular the risk that individual wires penetrate the electrical insulation, which means a considerable risk of accidents.
  • the structure of the metal structure changes, which makes the wire hard and brittle and has only a low flexural fatigue strength.
  • the annealing temperature of the wire In order to give the wire the desired mechanical properties, it is subsequently subjected to a heat treatment in a continuous annealing plant.
  • the annealing temperature of the wire In order to ensure the desired quality, the annealing temperature of the wire must lie within a precisely defined temperature range, its shortfall or shortfall leads to a reduction in quality and thus leads to rejects.
  • the present invention is therefore based on the object of providing an improved method and an improved device for regulating the heating power in a continuous annealing system for metal extrudates, in which an exactly reproducible temperature profile is achieved which is largely independent of external influences, such as e.g. wear of the contact rollers or brushes.
  • the device according to the invention is the subject of claim 4.
  • the method according to the invention creates the possibility of measuring the annealing power supplied to the wire very precisely and independently of the possible wear on the surfaces of the contact elements or contact rollers.
  • the wire speed is measured, which results in the amount of wire passing through the annealing system per unit of time.
  • an appropriately programmed control device calculates which annealing power is to be supplied to the wire so that the desired wire temperature is reached. If the annealing system has several individual annealing sections, the annealing output can be specified separately for each individual annealing section.
  • a default value for the setting of the effective value of the glow voltage is then derived by means of the phase control. This means that overall there is a target state, which can, however, differ considerably from the actual state, for example depending on the contact resistance between the brushes and the rotating contact rollers, the contact resistance between the contact rollers or the contact elements and the wire, etc.
  • the glow voltage supplied to the contact elements is measured and digitized in an analog / digital converter.
  • the current flowing in the wire is also measured. This value is also digitized. From the digitized values of current and voltage, the effective values and the total glow power supplied to the wire are calculated and compared with the actual value. If the actual value deviates, the voltage regulation is changed accordingly.
  • the method according to the invention has considerable advantages over the methods known in the prior art.
  • the rms value of the glow voltage is formed by squaring the voltage signal in an electronic module.
  • this value is associated with a more or less severe error, since the effect value image only for a certain curve shape, e.g. only for a sinusoidal curve, forms an exactly correct value.
  • the accuracy of the control is considerably improved.
  • the detection of the current flowing in the wire passing through allows a further increase in the accuracy of the glow power control.
  • the total voltage applied to the contact elements is only the voltage also applied to the respective wire section if the voltage is supplied to the contact element and the wire itself has no contact resistance.
  • a contact resistance resulting from wear or contamination, for example between a brush and a rotating contact roller, or between the contact roller and the wire, causes an increase in the overall resistance and thus a reduction in the current flowing through the wire.
  • the contact resistances reduce the temperature achieved in a conventional system without this being able to be detected by the control.
  • the optimal time for replacing or reworking the contact elements can be determined.
  • the device according to the invention for regulating the glow power has devices for detecting the respective instantaneous value of the voltage and the current applied to the glow path.
  • the voltage is measured in a conventional manner.
  • the measurement of the current can be carried out in the supply lines, but it is preferred, in particular when using an annealing system with a plurality of annealing sections arranged one after the other, to use a current measuring device which can directly detect the current flowing in the wire.
  • a slotted iron ring is preferably used according to the invention, through which the wire runs without contact, and in which the magnetic flux induced by the current flowing in the wire is detected by a Hall probe.
  • the detection of the current flowing in the wire has the advantage that it eliminates the influence of leakage currents.
  • leakage currents occur, for example, when the contact rollers are dirty or when the electrolyte is dirty.
  • an annealing system with several annealing sections e.g. a three-phase glow system is used, so the current can be measured in each annealing section. If the equipment complexity is to be reduced, it is also possible to record the current only in the last or in the first and the last annealing section.
  • the exemplary embodiment according to FIG. 1 shows the application of the present invention in a three-phase glow device which is traversed by a copper wire with a diameter of 0.63 mm.
  • the speed of the wire is 10 m / s.
  • the three-phase glow device has four contact rollers 1, 2, 3 and 4, which are shown in the diagram in FIG. 1 in one plane.
  • the wire D moves at the speed v in the direction of the arrow 5 through the wire glow device, the speed being detected by means of a tachometer generator 7.
  • the contact rollers 1 to 4 are supplied via a three-phase network 9, which has three phases R, S, T, which, as is known, are phase-shifted from one another by 120 °.
  • the phases of the three-phase current are connected to three AC controllers 10, 11, 12, each of which consists of two thyristors 15, 16 connected in parallel and two resistors 17, 18.
  • the AC power controllers 10, 11, 12 are each connected to the primary side of one of the three transformers 21, 22 and 23, which are connected in a triangle on the primary side. On the secondary side, the three transformers 21, 22, 23 are connected in a star.
  • the output of the transformer 21 leads to the contact rollers 1 and 4, the output of the transformer 22 to the contact roller 2 and the output of the transformer 23 to the contact roller 3. Since contact roller 1 and contact roller 4 have the same voltage potential, the glow device is electrically external to the outside neutral.
  • the glow voltages U 1 , U 2 , U 3 present at the glow sections I, II, III are recorded via measuring devices 30, 31, 32 and converted into a digital voltage value in the converter devices 35, 36, 37.
  • Each converter device 35, 36, 37 has an isolation amplifier which is followed by a low-pass filter with a cut-off frequency of 1000 Hz.
  • the output signal of the filter is fed to an analog / digital converter and digitized.
  • the sampling takes place at a time interval of 500 ⁇ s, the resolution is 12 bits.
  • the current flowing through the wire in the glow paths I, II, III is detected by means of sensors 40, 41 and 42, the sensor being explained in detail with reference to FIG. 7.
  • the measured variables detected are digitized in the converter devices 45, 46, 47.
  • the converter devices 45, 46, 47 for the current values consist, in the same way as the converter devices 35, 36, 37 for the voltage values, of a low-pass filter with a cut-off frequency of 1000 Hz, which is followed by an analog / digital converter. Sampling rate and resolution are the same as for the converter devices 35 to 37.
  • the output voltage of the tachometer generator is also digitized in a converter device 48.
  • the digitized values are fed to a processor device 50, preferably a microprocessor device, in which the RMS values for the voltage and the current are obtained from the digitized values and the effective annealing output in the individual annealing sections is determined, as will be explained below.
  • a processor device 50 preferably a microprocessor device, in which the RMS values for the voltage and the current are obtained from the digitized values and the effective annealing output in the individual annealing sections is determined, as will be explained below.
  • the processor device is used to control the AC power controller 50 control signals, which are converted in signal generating devices 53, 54, 55 into control signals suitable for controlling the AC power controllers.
  • the sensors 40, 41 and 42 for detecting the current flowing in the glow sections consist, as shown in FIG. 7, of an iron ring 70 which is interrupted by a gap 71.
  • a Hall probe 73 with leads 74, 75 is glued into the gap 71.
  • the current flowing in the glow lines induces a magnetic flux in the iron ring 70, which is measured in the gap 71 by the Hall probe 73.
  • the Hall voltage present on the leads 74, 75 can be converted directly into the current flowing through the glow path.
  • measuring device for measuring the current in a wire annealing device has particular advantages. On the one hand, the measurement is carried out without contact, so that neither the wire nor the sensor are subject to wear. Furthermore, the measuring device is essentially insensitive to contamination. Since the Hall probe works practically without inertia, the current can be measured very precisely and with an exact time course.
  • the sensor shown in Fig. 7 is essentially of one piece, i.e. the wire must be threaded through the opening in ring 70.
  • a divisible ring can also be used, in which the wire only has to be inserted.
  • the glow voltage curve is designated 82.
  • FIG. 3 shows the amplitude spectrum of the curve of the glow voltage according to FIG. 2.
  • a dimensionless characteristic value of the amplitude is plotted on the ordinate 83 and the frequency in kHz is plotted on the abscissa 84.
  • the course of the amplitude over the frequency is designated 85.
  • FIG. 4 shows the time profile of the current 92 in the glow path III for a predetermined time interval.
  • a dimensionless characteristic value of the glow current is plotted on the ordinate 90 and the time is plotted on the abscissa 91.
  • FIG. 5 shows (for a larger time interval than FIG. 4) the effective value 97 of the current, a dimensionless characteristic value of the current also being plotted on the ordinate 95 and the time on the abscissa 96. It is interesting to see that despite the constant wire throughput speed, the current is subject to greater fluctuations.
  • the processor device 50 determines the glow power in the individual glow sections by multiplying the respective effective values of voltage and current.
  • FIG. 6 shows the glow voltage, the glow current and the glow power in the glow path III arranged one above the other in a diagram.
  • a dimensionless characteristic value of the voltage is plotted on the ordinate 111 and the time is plotted on the time axis 112.
  • the curve shape 113 denotes the dimensionless characteristic value of the tension.
  • a dimensionless characteristic value of the current is plotted on the ordinate 121 and the time on the abscissa 122, in the same units as in diagram 110.
  • the curve 123 shows the course of a dimensionless characteristic value of the glow current over time.
  • a dimensionless characteristic value for the electrical power is plotted on the ordinate 131, and the time in the same units and at the same time as in the diagrams 110 and 120 on the abscissa 132.
  • the curve 133 shows the current value of the processor 50 calculates glow power again.
  • the processor device 50 now compares the currently supplied power for each of the glow lines I, II and III with the glow power which is required for the respective speed. This can be done by evaluating the formula given above. Instead, it is also possible to store a corresponding characteristic diagram for the desired glow power values in a memory of the control device 50, from which the required glow power for the glow paths I, II and III is then determined, if necessary with an interpolation.
  • the signal generating devices 53, 54, 55 are influenced in a corresponding manner in order to change the glow voltage in the individual glow lines in such a way that the deviation is minimized. This enables a very fast and precise regulation of the annealing output, which has a very positive effect on the quality of the wire produced.
  • the processor device also has the task of monitoring the measured variables in order to determine irregular operation of the system, in particular the wear of brushes and / or contact rollers.
  • the resistance of the wire in the individual glow lines is known, it can be determined whether a larger, undesired voltage drop occurs in the current transmission from brush to contact roller or from contact roller to the wire. It is found that the voltage required to generate a certain glow current is higher than a predetermined limit value, a signal is output to indicate the malfunction of the glow system.
  • comparison values can also be stored in the form of a table, which shows which glow voltage is required for correct operation in order to produce a specific glow current. If the measured rms values of the voltage exceed these stored values by a certain amount, this indicates an undesirably high contact resistance.
  • the processor device 50 also monitors the temporal fluctuations of the glow current and glow power. If the glow current is subject to greater fluctuations in time, this is a clear sign that the current transmission is uneven. This is an indication of the wear of the contact rollers. To evaluate the fluctuation, the effective value of the glow current and the glow power are examined in relation to the fluctuation in the amplitude and the frequency of the fluctuations. For this purpose, the values of the glow current and the glow power, which are already available in digital form, are subjected to numerical static methods for curve evaluation, as are known in the prior art.
  • the above-described device and the above-described method make it possible to record and regulate the glow power very precisely, and thus to heat the wire precisely with the desired temperature profile.
  • deviations in the glow power in particular by contact resistances, can be detected and compensated for by the control.
  • each of the annealing sections I, II and III is regulated individually to the predefined annealing output value.
  • the annealing power supplied to the last annealing section III is increased so far during a predetermined period of time that the cooling that has occurred in the annealing device is compensated. Since, at a time interval of 500 ⁇ s between the individual scans at a wire speed of 10 m / s, the individual measuring points are 5 mm apart with respect to the wire, the control can be carried out particularly precisely.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Detection And Correction Of Errors (AREA)

Claims (9)

  1. Procédé pour réguler la puissance de chauffage dans au moins un banc de chauffage d'une installation destinée à porter au rouge en continu des produits métalliques en forme de ruban allongé, au moyen de résistances, dans lequel :
    - on détecte au moyen d'un premier dispositif de mesure (7) la vitesse de passage du produit (D) qui traverse le banc de chauffage et on délivre un signal électrique représentatif de cette vitesse,
    - on détecte au moyen d'un second dispositif de mesure (30, 31, 32) la tension momentanée appliquée au banc de chauffage et on délivre un signal électrique représentatif de celle-ci,
    - on convertit la valeur momentanée détectée pour la tension en une valeur effective (Ue), et
    - au moyen d'un dispositif de commande (50) on forme, à partir de la valeur effective détectée de la tension, un signal de commande au moyen duquel on modifie la tension admise au banc de chauffage, afin d'atteindre une valeur de la puissance de chauffage prédéterminée, fonction de la vitesse mesurée,
    caractérisé en ce que :
    - le courant qui s'écoule dans ledit au moins un banc de chauffage est détecté au moyen d'un troisième dispositif de mesure (40, 41, 42),
    - la ou les valeurs momentanées mesurées de la tension de chauffage sont numérisées et intégrées, afin de déterminer respectivement la valeur effective de la tension pour une période courte prédéterminée,
    - la valeur momentanée mesurée du courant de chauffage est numérisée et intégrée, afin de déterminer respectivement, pendant la même période courte prédéterminée que pour la tension de chauffage, la valeur effective correspondante, et
    - le dispositif de commande est réalisé sous forme d'un dispositif à processeur dans lequel les valeurs effectives calculées de la tension de chauffage et du courant de chauffage sont multipliées, afin de calculer la puissance de chauffage admise effectivement au banc de chauffage considéré, et de la comparer avec la puissance de chauffage prédéterminée.
  2. Procédé selon la revendication 1, caractérisé en ce que le courant qui s'écoule dans ledit au moins un banc de chauffage est mesuré sans contact au niveau d'un fil situé dans le banc de chauffage.
  3. Procédé selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que le dispositif à processeur détermine, à partir des valeurs effectives mesurées de la tension de chauffage et à partir des valeurs effectives mesurées du courant de chauffage, la résistance électrique et délivre un signal d'alarme lorsque cette résistance dépasse une valeur prédéterminée.
  4. Appareil pour réguler la puissance de chauffage dans au moins un banc de chauffage d'une installation destinée à porter en continu au rouge un produit métallique en forme de ruban allongé, à l'aide de résistances, comprenant :
    - un premier dispositif de mesure (7), qui détecte la vitesse de traversée du produit en forme de bande (D) qui traverse le banc de chauffage en continu, et qui délivre un signal électrique représentatif pour cette vitesse ;
    - un second dispositif de mesure (30, 31, 32), qui délivre un signal représentatif pour la tension momentanée appliquée au banc de chauffage ;
    - un dispositif qui forme, à partir de la valeur momentanée détectée de la tension au niveau du banc de chauffage, une valeur effective (Ue), et
    - un dispositif de commande (50) qui forme, à partir de la valeur effective déterminée de la tension, un signal de commande au moyen duquel la tension admise au banc de chauffage est modifiée, afin d'atteindre une valeur de la puissance de chauffage prédéterminée en fonction de la vitesse mesurée,
    caractérisé en ce que :
    - il est prévu un troisième dispositif de mesure (40, 41, 42), qui délivre un signal de mesure représentatif pour le courant qui s'écoule dans ledit au moins un banc de chauffage,
    - il prévu un second dispositif, au moyen duquel la valeur momentanée mesurée pour le courant de chauffage est convertie en une valeur effective,
    - le premier et le second dispositif contiennent respectivement un premier et un second dispositif de conversion (35, 36, 37 ; 45, 46, 47) avec un circuit de numérisation, dans lequel les valeurs momentanées mesurées de la tension et du courant sont numérisées, et
    - chaque dispositif de conversion est suivi d'un dispositif d'intégration dans lequel est déterminée la valeur effective correspondante respective pour une courte période prédéterminée, à partir de cette valeur numérisée, et
    - le dispositif de commande est réalisé sous forme d'un dispositif à processeur et comporte un dispositif de multiplication dans lequel est calculée la puissance de chauffage effectivement fournie au banc de chauffage considéré, à partir des valeurs effectives calculées.
  5. Appareil selon la revendication 4, caractérisé en ce que ledit troisième dispositif de mesure (40, 41, 42) est prévu sous forme d'un dispositif de mesure à induction, qui détecte sans contact le courant qui s'écoule dans le banc de chauffage.
  6. Appareil selon la revendication 5, caractérisé en ce que le troisième dispositif de mesure (40, 41, 42) est réalisé sous la forme d'un anneau de fer (70), interrompu par une fente (71), dans laquelle est agencée une sonde de Hall (73) pour mesurer le flux magnétique dans l'anneau de fer.
  7. Appareil selon la revendication 6, caractérisé en ce que l'anneau de fer est réalisé de manière séparable, afin de faciliter la mise en place du fil.
  8. Appareil selon l'une au moins des revendications 4 à 7, caractérisé en ce que chaque dispositif de conversion (35, 36, 37 ; 45, 46, 47) comporte un filtre passe-bas, suivi d'un convertisseur analogique/numérique.
  9. Appareil selon l'une au moins des revendications 4 à 8, caractérisé en ce que l'écart temporel suivant lequel les valeurs de mesures individuelles sont prises et numérisées, est inférieur à 5 ms, et de façon particulièrement préférée inférieur à 1 ms.
EP93919106A 1992-08-21 1993-08-19 Procede et dispositif de regulation de la puissance calorifique d'une installation de recuit au passage de produits metalliques coules en continu Expired - Lifetime EP0656071B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4227812A DE4227812C2 (de) 1992-08-21 1992-08-21 Verfahren und Vorrichtung zur Regelung der Heizleistung in einer Durchlauf-Glühanlage für metallisches Stranggut
DE4227812 1992-08-21
PCT/EP1993/002222 WO1994004708A1 (fr) 1992-08-21 1993-08-19 Procede et dispositif de regulation de la puissance calorifique d'une installation de recuit au passage de produits metalliques coules en continu

Publications (2)

Publication Number Publication Date
EP0656071A1 EP0656071A1 (fr) 1995-06-07
EP0656071B1 true EP0656071B1 (fr) 1997-06-11

Family

ID=6466125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93919106A Expired - Lifetime EP0656071B1 (fr) 1992-08-21 1993-08-19 Procede et dispositif de regulation de la puissance calorifique d'une installation de recuit au passage de produits metalliques coules en continu

Country Status (7)

Country Link
US (1) US5700335A (fr)
EP (1) EP0656071B1 (fr)
JP (1) JPH08503258A (fr)
AT (1) ATE154398T1 (fr)
DE (1) DE4227812C2 (fr)
FI (1) FI101313B (fr)
WO (1) WO1994004708A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1647996B2 (fr) † 2004-10-12 2016-11-16 F.S.P. - One Cable toronne en aluminium cuivre, et procede pour sa fabrication
EP4481309A1 (fr) * 2023-06-19 2024-12-25 Alite GmbH Four de calcination indirecte idc
WO2026057603A1 (fr) * 2024-09-13 2026-03-19 Maschinenfabrik Niehoff Gmbh & Co. Kg Recuiseur de fil en continu et procédé de régulation de la température du fil dans le recuiseur de fil en continu

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004034939B4 (de) * 2004-07-20 2015-11-26 Maschinenfabrik Niehoff Gmbh & Co. Kg Verfahren und Anordnung sowie Computerprogramm mit Programmcode-Mitteln und Computerprogramm-Produkt zur Ermittlung einer Steuergröße für einen Leistungseintrag auf einen Draht bei einer konduktiven Wärmebehandlung des Drahtes
US20060049160A1 (en) * 2004-09-08 2006-03-09 Gunnar Holm Method and arrangement for annealing of strips
CN1300347C (zh) * 2004-12-09 2007-02-14 清华大学深圳研究生院 铜线的高能连续电脉冲在线退火方法及装置
JP5274782B2 (ja) * 2007-03-27 2013-08-28 株式会社ミツトヨ 表面性状測定装置、表面性状測定方法及び表面性状測定プログラム
DE102008004015B4 (de) * 2008-01-11 2018-01-11 Continental Automotive Gmbh Verfahren zur Erkennung von Übergangswiderständen in Leitungen einer Sonde
US8816259B2 (en) * 2012-04-06 2014-08-26 Siemens Aktiengesellschaft Pack heat treatment for material enhancement
ITBO20130601A1 (it) 2013-11-04 2015-05-05 Samp Spa Con Unico Socio Forno di ricottura a resistenza per la ricottura di un filo, trefolo, corda, vergella o piattina di metallo
ITBO20130602A1 (it) * 2013-11-04 2015-05-05 Samp Spa Con Unico Socio Forno di ricottura a resistenza per la ricottura di un filo, trefolo, corda, vergella o piattina di metallo

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1266335B (de) * 1964-08-19 1968-04-18 Siemens Ag Einrichtung zur Regelung der Gluehtemperatur bei einer Drahtanlage
DE1265183C2 (de) * 1966-06-22 1975-01-23 Siemens AG, 1000 Berlin und 8000 München Verfahren und anordnung zur regelung der heizleistung einer draht- oder bandgluehanlage
US3842239A (en) * 1972-12-08 1974-10-15 Interstate Drop Forge Co Power control circuit for resistance heating moving conductors
JPH01290718A (ja) * 1988-05-16 1989-11-22 Babcock Hitachi Kk 熱処理温度の制御方法
DE4010309C1 (en) * 1990-03-30 1991-05-23 Maschinenfabrik Niehoff Gmbh & Co Kg, 8540 Schwabach, De Maintenance of annealing temp. even after stoppage - involves measuring speed of wire and tacho:generator output voltage to produce control signal for thyristor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1647996B2 (fr) † 2004-10-12 2016-11-16 F.S.P. - One Cable toronne en aluminium cuivre, et procede pour sa fabrication
EP4481309A1 (fr) * 2023-06-19 2024-12-25 Alite GmbH Four de calcination indirecte idc
WO2026057603A1 (fr) * 2024-09-13 2026-03-19 Maschinenfabrik Niehoff Gmbh & Co. Kg Recuiseur de fil en continu et procédé de régulation de la température du fil dans le recuiseur de fil en continu

Also Published As

Publication number Publication date
EP0656071A1 (fr) 1995-06-07
WO1994004708A1 (fr) 1994-03-03
ATE154398T1 (de) 1997-06-15
FI950762A7 (fi) 1995-02-20
DE4227812A1 (de) 1994-02-24
JPH08503258A (ja) 1996-04-09
FI101313B1 (fi) 1998-05-29
FI101313B (fi) 1998-05-29
US5700335A (en) 1997-12-23
DE4227812C2 (de) 2001-01-04
FI950762A0 (fi) 1995-02-20

Similar Documents

Publication Publication Date Title
DE3404720C2 (fr)
DE69321670T2 (de) Widerstandsschweissmonitor
EP0373422B1 (fr) Appareil pour surveiller la qualité de soudures électriques
EP0656071B1 (fr) Procede et dispositif de regulation de la puissance calorifique d'une installation de recuit au passage de produits metalliques coules en continu
DE3328225C2 (fr)
DE3872369T2 (de) Ausgleichregler fuer spinnduesen.
EP0658068A2 (fr) Dispositif de surveillance de bobines à induction
EP2476511A1 (fr) Dispositif et procédé destinés à la surveillance d'une machine-outil
EP0307442B1 (fr) Procede et dispositif pour la regulation du processus de soudage electrique par resistance ou a l'arc
DE3622520A1 (de) Verfahren und einrichtung zur ueberwachung eines funkenerodier-prozesses in einer funkenerodiermaschine
EP1622732B1 (fr) Machine a fabriquer des ressorts helicoidaux et procede de commande de ladite machine
DE102010051559A1 (de) Algorithmus und Kalibrierverfahren zur Temperaturbestimmung eines induktiv beheizten Maschinenteils
DE69214348T2 (de) Verfahren und Vorrichtung zum Bestimmen der Position des Randes eines metallischen Materials
DE69503810T2 (de) Überwachungsvorrichtung für Funkenerosionsmaschine
DE4024432A1 (de) Verfahren und vorrichtung zur ermittlung der temperatur eines induktiv bzw. transformatorisch beheizten maschinenteils
DE69635353T2 (de) Verfahren und vorrichtung zur indiktiven messung von physikalischen parametern eines gegenstandes aus metall sowie deren verwendung
EP0153298B1 (fr) Dispositif de surveillance de procédés de soudage électrique, en particulier soudages électriques à résistance par points
DE19730531C1 (de) Verfahren und Vorrichtung zur Bestimmung der Temperatur eines induktiv beheizten Elements
DE2913877A1 (de) Verfahren und vorrichtung zur feststellung der aenderung eines bestimmten parameters eines unter ausbildung von wirbelstroemen mit einer induktionsspule elektromagnetisch gekoppelten metallischen erzeugnisses
EP3855144B1 (fr) Procédé de détermination de la température d'une enveloppe d'un continu d'une machine textile
EP2429751B1 (fr) Méthode et dispositif de détermination de la tension entre les électrode d'une pince de soudage par point
DE3036164C2 (de) Längenmeßeinrichtung
EP0122487A2 (fr) Appareil pour contrôler la surface de pièces métalliques
EP0004598B1 (fr) Procédé et circuit pour la commande de la tension entre les cages d'un laminoir continu à entraînement individuel
DE4025093A1 (de) Verfahren und schaltung zur induktiven messung der leitfaehigkeit in fluessigkeiten

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

17P Request for examination filed

Effective date: 19950127

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH FR GB IT LI PT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19960913

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH FR GB IT LI PT

REF Corresponds to:

Ref document number: 154398

Country of ref document: AT

Date of ref document: 19970615

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: AMMANN PATENTANWAELTE AG BERN

Ref country code: CH

Ref legal event code: EP

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

Effective date: 19970612

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

Ref country code: FR

Payment date: 19970828

Year of fee payment: 5

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

Ref country code: GB

Payment date: 19970829

Year of fee payment: 5

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

Ref country code: CH

Payment date: 19970901

Year of fee payment: 5

Ref country code: AT

Payment date: 19970901

Year of fee payment: 5

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

Ref country code: PT

Payment date: 19970905

Year of fee payment: 5

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

Ref country code: BE

Payment date: 19970911

Year of fee payment: 5

ET Fr: translation filed
REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 19970812

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
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: 19980819

Ref country code: AT

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

Effective date: 19980819

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

Ref country code: LI

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

Effective date: 19980831

Ref country code: CH

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

Effective date: 19980831

Ref country code: BE

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

Effective date: 19980831

BERE Be: lapsed

Owner name: MASCHINENFABRIK NIEHOFF G.M.B.H. & CO. K.G.

Effective date: 19980831

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

Ref country code: PT

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

Effective date: 19990228

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

Effective date: 19980819

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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: 19990430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

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

Effective date: 19990228

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050819