EP2644719A1 - Commande de refroidissement - Google Patents

Commande de refroidissement Download PDF

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Publication number
EP2644719A1
EP2644719A1 EP12161804.5A EP12161804A EP2644719A1 EP 2644719 A1 EP2644719 A1 EP 2644719A1 EP 12161804 A EP12161804 A EP 12161804A EP 2644719 A1 EP2644719 A1 EP 2644719A1
Authority
EP
European Patent Office
Prior art keywords
actuator
coolant
pump
pressure
determined
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Withdrawn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
EP12161804.5A
Other languages
German (de)
English (en)
Inventor
Klaus Weinzierl
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to EP12161804.5A priority Critical patent/EP2644719A1/fr
Priority to PCT/EP2013/055753 priority patent/WO2013143925A1/fr
Priority to EP13714569.4A priority patent/EP2817425B1/fr
Priority to CN201380027245.7A priority patent/CN104334754B/zh
Publication of EP2644719A1 publication Critical patent/EP2644719A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5735—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B21B37/76—Cooling control on the run-out table
    • 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
    • C21D11/005—Process control or regulation for heat treatments for cooling
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching

Definitions

  • the present invention relates to a method for controlling a cooling of a material with a coolant, a computer program product for carrying out such a method, a control device for controlling a cooling of a material with a coolant, and a cooling section of a rolling mill, comprising such a control device.
  • DD 213 853 A1 describes a control device for controlling a water supply in a water cooling section, which is operated to cool a rolling stock.
  • the object is achieved by a method for controlling a cooling of a material with a coolant, wherein a supply of the coolant to the material is controlled by at least one actuator which is adjustable in two or more different positions, wherein the actuator associated with an actuator characteristic field which indicates a relationship between a coolant flow, a pressure of the coolant and a position of the actuator, and a coolant flow is adjusted by detecting the pressure of the coolant in the flow direction of the coolant before the at least one actuator, from the actuator characteristic map the corresponding to the determined pressure value and a desired coolant flow position is determined, and the actuator is set in the determined position.
  • the object is further achieved by a computer program product for controlling the cooling of a material with a coolant, wherein a supply of the coolant to the material is controlled by at least one actuator which is adjustable in two or more different positions, wherein the actuator is an actuator characteristic field indicating a relationship between a coolant flow, a pressure of the coolant, and a position of the actuator, the computer program product when executed by a computing unit the following method steps are carried out: determination of a position corresponding to a pressure value of the coolant, which was determined in the flow direction of the coolant before the at least one actuator, and a desired coolant flow corresponding position from the actuator characteristic field; and generating a signal that triggers an adjustment of the actuator to the detected position.
  • a control device for controlling a cooling of a material with a coolant comprising a storage unit, which is designed to store an actuator characteristic field, the relationship between a coolant flow, a pressure of the coolant and a position at least one of the actuator Indicates a characteristic unit for controlling the supply of the coolant to the material, a processor unit which is designed to determine from the stored actuator characteristic field the position corresponding to a determined pressure value of the coolant and a desired coolant flow of the at least one actuator, and a signal unit, which is designed to send to a setting unit a signal for setting the at least one actuator in the determined position.
  • a common coolant is water, especially for the cooling of a material such as metal.
  • a coolant in the description of the invention, the terms “flow” and “flow” are used equivalently: they describe an amount of coolant passing per unit time through a given cross-sectional area.
  • the cooling in the form of a water jet cooling often referred to as laminar cooling, take place.
  • Water jet cooling is a cooling of the material with one or more jets of water.
  • the intensive cooling can be considered as a special case of laminar cooling. For intensive cooling in the sense of the present description, a high water requirement at a water pressure greater than 1 bar is characteristic.
  • the water requirement of the intensive cooling can not be covered from a pure water tank, so that the operation of the intensive cooling -
  • the valves of the intensive cooling are preferably continuously adjustable, ie, the amounts of water are continuously variable to allow accurate metering of the cooling capacity.
  • no flow control circuits are constructed, but the actuators of a coolant run are controlled directly. Furthermore, no pressure control loop is established for the amount of coolant to be supplied to the cooling.
  • the present invention is based on the finding that a high setting speed of a required coolant flow, z. B. a cooling water flow in a cooling line, can only be achieved by a controller, whereas a conventional scheme is too slow and too susceptible to failure, especially under the conditions of intensive cooling.
  • a first actuator characteristic field k f (w, p) is assigned, which maps the input quantities coolant flow w and pressure p of the coolant to an actuator position k and from a desired coolant flow w a direct determination of a corresponding actuator position k allows.
  • This characteristic field is either previously known or is determined at least once by Auslitern of the actuator.
  • ventilation is meant an experimental determination of the flow through the actuator as a function of the position of the valve and the pressure of the coolant. To calibrate the actuator characteristic field f (w, p) flow measurements can be made.
  • a process computer controls the actuators using the associated characteristic fields such that the required coolant flow flows through each actuator.
  • the actual pressure p is detected, inserted into the characteristic field of each actuator, and each desired coolant flow w is mapped to a corresponding desired actuator position k.
  • the target pressure is used instead of the actual pressure in the characteristic field.
  • actuators designed as dampers can be moved from 0% to 100% of their opening degree in 2 s and from 20% to 80% of their opening degree in 1 s, and moreover, the pump can be stopped in less than 1 s from standstill Maximum speed can be brought.
  • a rapid adjustment of the coolant flow in each coolant inlet to the material and an even faster adjustment of the coolant flow to supply the intensive cooling is possible, even if the coolant to the intensive cooling only over a long supply line, z. B. over a length in the range of 100 to 200 m, zoom must be transported.
  • a cooling line of a rolling mill is required, for example, a cooling water amount of about 150 m 3 of water, sufficiently fast to accelerate, with the entry of the material to be cooled, for.
  • a metal strip in the cooling line in a very short time, z. B. on a time scale of typically 1 s to build a stable flow of coolant.
  • the length of insufficiently cooled material remains smaller than 10 m. For a laminar flow cooling line, this value is of the same order of magnitude.
  • the at least one actuator is adjusted continuously in the determined position.
  • the at least one actuator is a continuously adjustable actuator.
  • a continuous adjustment or adjustability of the at least one actuator means that the at least one actuator is continuously adjusted in the determined position.
  • the continuously variable actuator it may, for. B. act a valve or a control valve.
  • a control method using continuously variable actuators is not significantly more expensive than the conventional equipment of cooling sections with simple switching valves.
  • a high tank decouples the control of the water management from the control of the valves of the valves.
  • Such a control avoids the switching jumps occurring in switching valves in temperature and is therefore particularly suitable for a model-predictive control of the temporal Abkühlverlaufs in the cooling section.
  • a third pump characteristic field ⁇ p s (n, w) is assigned, which the pressure difference .DELTA.p of the coolant between the suction pressure at the input side of the pump and the output pressure at the output side of the Pump prevails as a function s of the pump speed n and the coolant flow w indicates.
  • the coolant pump z.
  • a pump characteristic field n q (w, pp suction ) can be assigned.
  • n designates the target pump speed, w to be conveyed for cooling Coolant flow, p the pressure at the outlet side of the pump and p suction the suction pressure at the inlet side of the pump.
  • w must be the sum of the coolant flows of all the actuators of the cooling, plus any further existing customers who receive coolant from the cooling pump.
  • the pump is controlled by a process computer so that it runs at a speed n, which emerges at the onset of the desired coolant flow w and a target pressure increase pp suction into the pump characteristic field.
  • the suction pressure is advantageously measured on the input side of the pump.
  • an estimate may also be used, e.g. B. calculated from the height difference between the location of the pump and the coolant level in a coolant tank, with which the suction side of the pump is supplied.
  • a desired value of another control device can be used, which supplies the coolant to the pump on the suction side.
  • a control device not only the actuators, but also the pumps, for. B. for the high tank, controls because the control device, the coolant flows to be provided are already known in advance.
  • This can be provided in the form of a so-called intelligent coolant management:
  • controls the control device in addition to actuators, for. B. the valves of the valves, the entire water management across and "knows" all water consumers in the system, d. H. takes into account their water consumption on the basis of previously collected and / or current consumption values.
  • the control device also controls the intensive cooling.
  • the pump is preferably frequency-controlled with a converter.
  • the characteristic field of the pump is either previously known or is determined at least once by Auslitern the pump.
  • the position of the at least one actuator and the speed for operating the at least one Coolant pump is determined in one step as a common setpoint set, wherein the pressure of the coolant before the at least one actuator is identical to the output pressure at the output side of the pump.
  • suction pressure of the refrigerant at the input side of the pump is determined by a measurement or an estimation.
  • the actuator characteristic field is adapted by determining the pressure of the coolant, in particular measured, the position of the actuator is determined from the actuator characteristic field of the determined values, ie pressure and position, corresponding coolant flow is determined, the coolant flow determined from the actuator characteristic field is compared with a measured coolant flow and the actuator characteristic field is changed so that the coolant flow determined from the actuator characteristic field coincides with the measured coolant flow.
  • the recognition functions are local, e.g., if they are B-splines that are different only in an environment around the zero evolution point, the adaptation converges very fast, because then the map is improved only in the vicinity of the current measurement and points of the map farther away from the current measurement are not changed, in particular not be degraded.
  • the pressure p of the coolant and the coolant flow w of the coolant are determined, in particular measured, from the actuator characteristic field to the values determined, i. H. Pressure and coolant flow, corresponding position of the actuator determined, compared the determined from the actuator characteristic field position of the actuator with a measured position of the actuator and the actuator characteristic field changed so that the determined from the actuator characteristic field position of the actuator with the measured position of the actuator coincides.
  • the pump characteristic field is adapted by determining the pressure difference and the flow of the coolant, from the pump characteristic field corresponding to the determined values pump speed is determined, the pump speed determined from the pump characteristic curve pump speed with a measured Pump speed is compared and the pump characteristic field is changed so that the determined from the pump characteristic field pump speed coincides with the measured pump speed.
  • control device comprises the at least one actuator, which is preferably designed as a valve or a control valve.
  • a further preferred embodiment of the invention is a cooling section of a rolling mill, comprising a control device according to one of claims 11 to 13 for controlling the cooling of a material in the cooling section.
  • the cooling section comprises an intensive cooling section and / or a laminar cooling section.
  • the present invention can be used both for an intensive cooling section and for a laminar cooling section.
  • the invention is not limited to intensive cooling. It is also possible to control a zone of a normal laminar cooling path with it if the actuators in this zone are continuously adjustable.
  • the invention can also be carried out when the variable-speed pump is supplied directly from a coolant supply network with coolant, for. B. is supplied directly from the water supply network with water ,, d. H. without a high tank arranged therebetween and acting as a buffer.
  • intensive cooling With intensive cooling, a section of the cooling section with a particularly high cooling capacity, high cooling rates can be realized.
  • An advantage of intensive cooling which is also known as a "power cooling" method, is that even higher and high strength steels in a wide range of thickness even faster, d. H. with a higher cooling rate, can be cooled. This enables the high-precision and efficient production of additional steel grades, in particular steels with higher strengths than before.
  • An intensive cooling section may be particularly useful in the forward section of the cooling section to inhibit grain growth in a material material, accelerate the phase transformation of a material, and thereby increase the overall strength of the material. In certain cases, such intensive cooling but also be useful behind the roughing or at other points of the cooling section be installed. It is also possible to arrange intensive cooling beams between stands of the finishing train.
  • a strip cooling system for a hot rolling mill may include a pre-strip and a finish strip cooling, consisting of an intensive and a laminar cooling section.
  • the pre-strip cooling can be installed behind a roughing stand in the area of the intermediate roller table. It provides temperature compensation over the entire length and width of the sliver before it arrives on the finishing train.
  • an intensive cooling section can be arranged at the exit of the finishing train.
  • a laminar cooling section can be positioned. Usually both systems are operated together.
  • a tape in the intensive cooling may require a cooling water amount in the range of 8000 m 3 / h.
  • the intensive cooling can not be activated before the arrival of the tape in the cooling line, as a rule, because with thinner tapes acting on the tape by the water forces can cause the tape to fly up.
  • thicker tapes often require a warmer tape on the first tapes so that the reel can grip the tape and bend around the mandrel. This means that especially at the belt inlet and the belt outlet large amounts of water must be changed very dynamically.
  • the present invention provides just this dynamic.
  • the present invention makes it possible to accurately meter the large amounts of water used in intensive cooling.
  • the accuracy of the amount of water applied to the intensive cooling is critical to the accuracy of the reel temperature that can be achieved. This is particularly important in order not to let the advantage of high cooling rates, the increase in strength, turn into the disadvantage of poor reproducibility of the material properties.
  • deterioration of reel temperature accuracy over standard laminar cooling can be avoided by operating the intensive cooling at low cooling power to produce standard products.
  • the invention also avoids a significant deterioration of the reel temperature accuracy when operating at high cooling capacities.
  • the present invention provides an application of a control method of coolant actuators according to a characteristic field and preferably additionally a coolant pump according to a characteristic field on a cooling path of a metalworking line, in particular in a hot strip mill, but the invention can also be applied in particular in a heavy plate mill , in which thick sheets are produced and must be cooled.
  • Fig. 1 shows a metalworking line 1, which is referred to here as a cooling line 2, also referred to as a cooling section.
  • the cooling line 2 is connected downstream of a production line whose last rolling stand is indicated at 3.
  • a material 4, which is designed here as a metal to be processed 4 in strip form, first passes through the production line and then the cooling section 2, whereupon it is for removal or caching until further processing on a reel 5, which is downstream of the cooling section 2 , is wound up.
  • the metalworking line 1 can z. B. be arranged in a hot strip mill of a steelworks.
  • the cooling section 2 comprises actuators 6, with which a defined coolant flow can be discharged onto the material 4, a coolant inlet 13, through which coolant from a coolant reservoir, for.
  • a water supply network or a high tank are supplied to the actuators 6 can, and a switched into the coolant inlet 13 coolant pump 20, with which the pressure of the coolant at an output side 20a of the pump 20 against a pressure of the coolant at an input side 20e of the pump 20 can be changed.
  • the actuators include 6 flaps and valves with which serving as a coolant water via cooling bars 14 on the band-shaped metal 4 can be applied, for. B. aufspritzbar, is to cool it.
  • the cooling section 2 may include a large number of such actuators 6. All actuators can be supplied with coolant via the same pump. It is also possible that there are two or more pumps, each providing one or more actuators with coolant.
  • the cooling section 2 further comprises a control device 7, which in Fig. 1 is indicated schematically.
  • the control device 7 comprises a computing unit 8, a memory unit 12, an input device 9 for inputting data into the computing unit 8 and a display device 10 for displaying data.
  • the arithmetic unit 8 controls via control lines 15, the actuators 6, z. As valves, nozzles or flaps, according to an actuator characteristic map 11w.
  • the arithmetic unit 8 controls the coolant pump 20 via control lines 15 in accordance with a pump characteristic field 11n.
  • the actuators 6 are individually controlled and thus the flow rates of the chilled beam 14 separately regulated.
  • a high tank feeds the cooling bars 14 with coolant, in particular with water, via the coolant inlet 13.
  • the pump 20 can be switched on. In this way, the cooling of the respective produced material, for. As the steel grade, adapt.
  • control device 7 in a manual operating mode at least partially via the input device 9 can be changed by an operator, so that z. B. the actuators 6 can be controlled in groups or separately.
  • the manual controllability does not have to be permanently provided, it is just as conceivable that it is possible to switch between an automatic operating mode and a manual operating mode.
  • the arithmetic unit 8 receives further information about the state of the cooling section 2 or the metal 4.
  • the metal 4 and its state when entering into describe the cooling section 2, z.
  • One or more actuator characteristic fields 11w and one or more pump characteristic fields 11n are stored in the memory unit 12.
  • one of the stored characteristic fields is assigned to the respective component.
  • two or more actuators or pumps of the same type are assigned the same characteristic field; This achieves faster convergence in the cooling system, and cooling control can be faster.
  • each actuator 6 and each pump 20 is assigned its own characteristic field 11w or 11n.
  • the actuator characteristics map 11k may be stored in a memory unit of a controller.
  • a process computer of the control device detects for each actuator, the actual pressure p i , this sets in the actuator associated with each actuator characteristic map 11k and determined based on the actuator characteristic field 11k to each desired coolant flow w i , should a corresponding desired actuator position k i of an actuator. Thereafter, the process computer controls the actuators accordingly.
  • a signal unit of a control device sends a signal for setting the at least one actuator in the determined position k i to an actuating unit, which serves to adjust the actuator.
  • the parameter curves w define the mutual dependence between the coolant pressure p and the position k i of an actuator for different coolant flows w.
  • the second actuator characteristic field 11w is used to determine a position k i of an actuator 6, in which under a desired coolant flow p i, a desired coolant flow, the desired coolant flow w i , soll, results.
  • the procedure is as follows: first, the pressure p i of the coolant, as seen in the flow direction of the coolant between the coolant pump 20 and the actuator 6, is determined. This determination can be made by a pressure measurement or an estimate. Is from the actuator 6 associated actuator characteristic field 11w then the pressure value determined to the p i and the desired coolant flow w i, soll determined corresponding position k i of the actuator. 6 Finally, the relevant actuator 6 is set in the determined position k i .
  • the z. B. is determined by a flow measurement of the coolant flow, and according to the actuator characteristic field 11w expected coolant flow w i , should a difference occurs, which is above an allowable tolerance value, is preferably an adaptation of the actuator characteristic field 11w to the actual conditions carried out.
  • the parameter curves n define the mutual dependence between the coolant pressure difference ⁇ p and the coolant flow w for different rotational speeds n of the coolant pump 20.
  • the pump-12n characteristic field is used to determine a rotational speed n i at which a desired coolant flow under a predetermined coolant pressure difference Dp, the target coolant flow w i, is intended to result.
  • the procedure is as follows: first, the suction pressure p suction of the coolant, that is, the coolant pressure at the input side 20e of the pump 20, determined, and from the target pressure difference .DELTA.p soll calculated. Subsequently, to the calculated target pressure difference Ap is to pump from the characteristic field 12n, and to a target coolant current i w, the pump speed is to n i is determined. Finally, the speed of the pump 20 is set to the determined value n i .
  • the z. B. is determined by a flow measurement of the coolant flow, and according to the pump characteristic field 12n expected coolant flow w i, should a difference occurs, which is above an allowable tolerance value, is preferably an adaptation of the pump characteristic field 12n to the actual conditions carried out.
  • the amplification factors b j are suitably selected to the respective associated approach functions q j (w, pp suction ) by the output pressure p of the coolant at the output side 20a of the pump is determined, in particular measured.
  • the pressure difference ⁇ p of the coolant is determined.
  • the parameter curves w define the mutual dependence between the coolant pressure difference ⁇ p and the rotational speed n for different volume flows w of the coolant.
  • Fig. 6 shows a schematic representation of the control of the coolant flow to a material to be cooled 4.
  • a pump 20 and subsequently a valve 6 are arranged in the flow direction of the coolant.
  • the coolant In the flow direction of the coolant seen upstream of the pump 20, ie on the input side 20e of the pump 20, the coolant has a pressure which is referred to as the suction pressure p intake.
  • the cooling means In the flow direction of the coolant seen by the pump 20, that is on the exit side 20a of the pump 20, the cooling means comprises a pressure simply referred to as p on which results on the generated by the pump 20 from the suction pressure change p intake.
  • the operation of the pump 20, in particular its speed n, is controlled by means of the pump characteristic field 12n.
  • the flow rate of the valve 6, which is located downstream of the pump 20 when viewed in the flow direction of the coolant, is controlled by means of the actuator characteristic map 11k.
  • the coolant flow w i of the coolant to the material 4 can thus be precisely controlled by the pump 20 and the valve 6.
  • the coolant flow w i can not be determined, in particular can be measured, an adaptation with respect to the temperature of the material to be cooled, for. B. a metal part, take place. As a result, an error of the coolant flow w i can be compensated or eliminated. If the temperature model is sufficiently known, it can be concluded that a certain coolant flow w i is cooling by a certain temperature difference.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP12161804.5A 2012-03-28 2012-03-28 Commande de refroidissement Withdrawn EP2644719A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP12161804.5A EP2644719A1 (fr) 2012-03-28 2012-03-28 Commande de refroidissement
PCT/EP2013/055753 WO2013143925A1 (fr) 2012-03-28 2013-03-20 Commande d'un système de refroidissement
EP13714569.4A EP2817425B1 (fr) 2012-03-28 2013-03-20 Commande de refroidissement
CN201380027245.7A CN104334754B (zh) 2012-03-28 2013-03-20 冷却过程的控制

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12161804.5A EP2644719A1 (fr) 2012-03-28 2012-03-28 Commande de refroidissement

Publications (1)

Publication Number Publication Date
EP2644719A1 true EP2644719A1 (fr) 2013-10-02

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EP12161804.5A Withdrawn EP2644719A1 (fr) 2012-03-28 2012-03-28 Commande de refroidissement
EP13714569.4A Active EP2817425B1 (fr) 2012-03-28 2013-03-20 Commande de refroidissement

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EP13714569.4A Active EP2817425B1 (fr) 2012-03-28 2013-03-20 Commande de refroidissement

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EP (2) EP2644719A1 (fr)
CN (1) CN104334754B (fr)
WO (1) WO2013143925A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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CN104747461A (zh) * 2015-01-07 2015-07-01 马钢(集团)控股有限公司 一种型钢穿水冷却高压变频水泵的控制系统

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EP3495056B1 (fr) 2017-12-11 2020-09-16 Primetals Technologies Austria GmbH Commande améliorée de la gestion de l'eau d'un circuit de refroidissement
DE102018219276A1 (de) * 2018-03-12 2019-09-12 Sms Group Gmbh Kühlgruppe einer Laminarkühlvorrichtung
DE102018208126A1 (de) * 2018-05-23 2019-11-28 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Verfahren zum Hantieren eines Werkstücks mit Hilfe eines Entnahmewerkzeugs und Maschine zur Durchführung des Verfahrens
EP3895819B1 (fr) 2020-04-14 2023-06-07 Primetals Technologies Germany GmbH Fonctionnement d'un dispositif de refrodissement avec une pression de fonctionnement minimale
EP3896286A1 (fr) 2020-04-14 2021-10-20 Primetals Technologies Germany GmbH Fonctionnement d'une pompe d'un dispositif de refroidissement sans l'utilisation d'un champ caractéristique multidimensionnel mesuré
DE102020205252A1 (de) * 2020-04-24 2021-10-28 Kocks Technik Gmbh & Co Kg Vorrichtung zum Kühlen von Langprodukten und Verfahren zum Kühlen eines Langproduktes unter Verwendung derselben
DE102021001967A1 (de) 2021-04-15 2022-10-20 Primetals Technologies Germany Gmbh Druckstoßfreies Aus- und Einkoppeln von Pumpen

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WO2013143925A1 (fr) 2013-10-03
EP2817425B1 (fr) 2016-05-18

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