EP4073278A1 - Querfeldinduktionsheizeinrichtung - Google Patents
QuerfeldinduktionsheizeinrichtungInfo
- Publication number
- EP4073278A1 EP4073278A1 EP20851315.0A EP20851315A EP4073278A1 EP 4073278 A1 EP4073278 A1 EP 4073278A1 EP 20851315 A EP20851315 A EP 20851315A EP 4073278 A1 EP4073278 A1 EP 4073278A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cross
- heating device
- induction heating
- partial
- induction
- 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.)
- Pending
Links
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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/101—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- 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
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
-
- 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
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
- C21D9/60—Continuous furnaces for strip or wire with induction heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0006—Electric heating elements or system
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/101—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces
- H05B6/103—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor
- H05B6/104—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor metal pieces being elongated like wires or bands
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/14—Tools, e.g. nozzles, rollers, calenders
- H05B6/145—Heated rollers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/36—Coil arrangements
- H05B6/362—Coil arrangements with flat coil conductors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Definitions
- the present invention relates to a cross-field induction heating device for inductive heating of metal strip in a rolling mill with an upper inductor and a lower inductor, between which the metal strip to be heated is arranged.
- CN 104508154 B describes a cross-field induction heating device in which two inductors are arranged above and below a metal strip in order to heat the metal strip. Both inductors have a line part (feed part) and a conveyor part, which are arranged on the same side of the strip to be heated. Furthermore, each inductor has a bent head, which are each assigned to an edge of the Ban to be heated and are arranged on different sides of the Me tallbandes. The fact that with this arrangement all parts are arranged on one side of the strip to be heated means that particularly good space is achieved. use of the space available on a rolling mill.
- the heating device has inductors which are provided between two adjacent roll stands.
- the inductors each include a conductor loop above and below a strip to be heated and each consist of a C-shaped induction bracket which is open on the operating side of the rolling train and closed on the drive side at least by means of the inductor feeds.
- a pair of inductors with a total of two inductors is arranged next to one another in the direction of belt travel.
- the two inductor pairs can each be moved relative to one another, depending on the width of the strip, perpendicular to the direction of travel of the strip, so that, in total, a symmetrical heating effect is achieved on the strip.
- the inductor feeds are shifted together with the respectively connected inductors perpendicular to the strip running direction.
- the present invention is based on the object of providing a cross-field induction heating device of the type described at the beginning, which enables particularly good control of the strip edge heating.
- This object is achieved in a cross-field induction heating device of the specified type according to the invention in that each inductor is divided into two partial induction loops arranged next to one another, which are connected in series and fed in in opposite directions, so that the shared and identical current fed in both partial induction coils is aligned in opposite directions.
- each inductor into two partial induction loops arranged next to one another, a particularly high surface power density is achieved with less edge overheating. Due to the division into two oppositely fed conductor loops arranged next to one another, the power input into the strip to be heated in the area between the conductor loops is kept significantly lower than in the area below the conductor loops, so that less heating results. This prevents overheating of the strip edge with the greatest possible surface power density.
- the resulting magnetic fields compensate each other in the head area of the inductor. This prevents a circulating current from being induced across the uninsulated drive rollers of the belt.
- the resulting magnetic flux which passes through a conductor loop that symmetrically comprises both partial coils, becomes zero. This means that there is no electrical voltage in the conductor loop induced so that the current in the loop is also zero.
- the two induction loops arranged next to one another are preferably arranged in a coil housing. In particular, they are arranged within a shielding hood in order to vaporize the resulting stray field.
- Each partial induction loop can be moved individually perpendicular to the belt axis. This can support the threading of the Bandkopf fes. In the case of tape salad, the spools can be opened to remove the excess material.
- the two partial induction loops are preferably arranged between two drive rollers of the belt to be heated. If a conductor loop is formed by the belt and the two grounded drive rollers of the belt, this prevents spark formation between the belt and the drive roller and prevents a current through the bearing points.
- the partial induction loops have rounded heads arranged adjacent to one another.
- Each partial induction loop is preferably designed in the head area in the manner of a hammer head. It has been shown that with hammer heads of this type a particularly good control of the edge heating of the belt is possible. The hammer head geometry of the inductor head therefore proves to be superior to the known lamp shape geometry.
- heating is generated over a shorter distance, with significantly less overheating, particularly at the edge in the foot area of the strip.
- each part of the induction loop preferably has forward and return conductors running parallel to one another in its foot region.
- the partial induction coils extend, in particular in a standard position, with their hammer head over one strip edge and with their forward and return conductors over the other strip edge. As already mentioned, this avoids overheating of the edges and suppression of parasitic circulating currents and achieves a higher surface power density with less edge overheating.
- the invention is tert erläu below using an exemplary embodiment in conjunction with the drawing.
- the single figure shows a schematic plan view of part of a transverse field induction heating device.
- the inductor shown here is divided into two partial induction loops 2, 3 arranged side by side, which are connected in series and fed in in opposite directions, so that the divided, same current fed in is oriented in opposite directions in both partial induction coils 2, 3, as indicated by the corresponding arrows in the partial induction loops 2, 3 is indicated.
- the direction of the current induced in band 1 is also shown by arrows.
- the two adjacently arranged partial induction loops 2, 3 each have a head area 4 and a foot area 5.
- the head area is designed in the manner of a hammer head, while the foot area 5 has an outward and return conductor which run parallel to one another. In the standard position shown here, the head area and foot area each extend over an edge of the metal strip to be heated.
- Both partial induction loops 2, 3 can be moved independently of one another with respect to the axis of the metal strip, and their position can be controlled accordingly in order to achieve the most uniform possible heating of the metal strip.
- the cross-field induction heating device is arranged between two adjacent drive rollers 6 of the metal belt.
- the two partial induction loops 2, 3 are located in a common coil housing (not shown) and are shown in FIG Connected in series and arranged within a shielding hood (not shown) in order to dampen the resulting stray field. Due to the division into two oppositely fed conductor loops arranged next to one another, the power input into the metal strip 1 in the area between the conductor loops is significantly less heated. This prevents overheating of the strip edge with the greatest possible surface power density. Because the divided current is aligned in opposite directions in both loops, the resulting magnetic fields compensate each other in the head area of the inductor. This prevents a circulating current from being induced via the uninsulated drive rollers 6.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Induction Heating (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019008622.8A DE102019008622A1 (de) | 2019-12-13 | 2019-12-13 | Querfeldinduktionsheizeinrichtung |
PCT/DE2020/000292 WO2021115508A1 (de) | 2019-12-13 | 2020-11-27 | Querfeldinduktionsheizeinrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4073278A1 true EP4073278A1 (de) | 2022-10-19 |
Family
ID=74561644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20851315.0A Pending EP4073278A1 (de) | 2019-12-13 | 2020-11-27 | Querfeldinduktionsheizeinrichtung |
Country Status (5)
Country | Link |
---|---|
US (1) | US20230010580A1 (de) |
EP (1) | EP4073278A1 (de) |
CN (1) | CN114981455A (de) |
DE (1) | DE102019008622A1 (de) |
WO (1) | WO2021115508A1 (de) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4778971A (en) * | 1986-05-23 | 1988-10-18 | Kabushiki Kaisha Meidensha | Induction heating apparatus |
GB8902090D0 (en) * | 1989-01-31 | 1989-03-22 | Metal Box Plc | Electro-magnetic induction heating apparatus |
FR2808163B1 (fr) * | 2000-04-19 | 2002-11-08 | Celes | Dispositif de chauffage par induction a flux transverse a circuit magnetique de largeur variable |
US6570141B2 (en) * | 2001-03-26 | 2003-05-27 | Nicholas V. Ross | Transverse flux induction heating of conductive strip |
FR2852187A1 (fr) * | 2003-03-07 | 2004-09-10 | Celes | Dispositif de chauffage par induction d'une bande metallique |
DE10323796B3 (de) * | 2003-05-23 | 2005-02-10 | Thyssenkrupp Nirosta Gmbh | Vorrichtung zum Erwärmen eines Metallbandes sowie mit einer derartigen Vorrichtung ausgestattete Anlagen zum Erzeugen von warmgewalztem Metallband |
JP5114671B2 (ja) * | 2007-04-16 | 2013-01-09 | 新日鐵住金株式会社 | 金属板の誘導加熱装置および誘導加熱方法 |
JP5042909B2 (ja) * | 2008-04-16 | 2012-10-03 | 新日本製鐵株式会社 | 金属板の誘導加熱装置および誘導加熱方法 |
DE102011006357A1 (de) * | 2010-10-08 | 2012-04-12 | Sms Siemag Ag | Walzstraße zum Herstellen eines Metallbandes und Verfahren zur Herstellung einer Walzstraße |
KR101428178B1 (ko) * | 2012-07-30 | 2014-08-07 | 주식회사 포스코 | 가열장치 및, 이를 포함하는 연속 금속판 가열 시스템 |
EP3025799B2 (de) * | 2014-11-28 | 2020-04-15 | SMS group GmbH | Walzanlage |
MX2018006811A (es) * | 2015-12-04 | 2018-11-09 | Arconic Inc | Metodos para enfriar una hoja electricamente conductora durante el tratamiento termico por induccion de flujo transversal. |
-
2019
- 2019-12-13 DE DE102019008622.8A patent/DE102019008622A1/de active Pending
-
2020
- 2020-11-27 EP EP20851315.0A patent/EP4073278A1/de active Pending
- 2020-11-27 CN CN202080093375.0A patent/CN114981455A/zh active Pending
- 2020-11-27 WO PCT/DE2020/000292 patent/WO2021115508A1/de active Search and Examination
- 2020-11-27 US US17/784,754 patent/US20230010580A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2021115508A1 (de) | 2021-06-17 |
US20230010580A1 (en) | 2023-01-12 |
CN114981455A (zh) | 2022-08-30 |
DE102019008622A1 (de) | 2021-06-17 |
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Legal Events
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