EP1604551B8 - Vorrichtung zur induktiven erhitzung eines metallbandes - Google Patents
Vorrichtung zur induktiven erhitzung eines metallbandes Download PDFInfo
- Publication number
- EP1604551B8 EP1604551B8 EP04717127A EP04717127A EP1604551B8 EP 1604551 B8 EP1604551 B8 EP 1604551B8 EP 04717127 A EP04717127 A EP 04717127A EP 04717127 A EP04717127 A EP 04717127A EP 1604551 B8 EP1604551 B8 EP 1604551B8
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- monospire
- long sides
- longitudinal direction
- coil
- 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.)
- Revoked
Links
Classifications
-
- 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
- H05B6/36—Coil arrangements
- H05B6/365—Coil arrangements using supplementary conductive or ferromagnetic pieces
Definitions
- the invention relates to a device for heating by electromagnetic induction of one or more metal strips, which device comprises at least one induction coil which surrounds an area of the strip (s) transversely to the longitudinal direction of the ( tapes).
- Such a heating device is used, for example, in processing lines for metal strips, in particular for drying a coating such as a layer of paint, or heating before galvanizing or heating before annealing applied to this strip. which passes through the inductor or coils, in its longitudinal direction.
- the object of the invention is, above all, to provide a heating device which makes it possible to reduce or eliminate the defects in the coating of the strip which may appear with the heating devices known to date.
- the device for heating by electromagnetic induction of a metal strip comprising at least one inductor coil which surrounds an area of the strip transverse to the longitudinal direction of the strip, is characterized in that the coil comprises at least a monospire whose mean plane is orthogonal to the longitudinal direction of the strip.
- the electromagnetic field produced has no transverse component in the strip, contrary to the state of the art according to which the turns of the coil are inclined on the longitudinal direction of the strip.
- the elimination of this transverse component makes it possible to avoid the circulation of parasitic induced currents in the strip which are the source of potential differences between the strip and the rollers situated upstream and downstream of the inductor. These differences in potentials cause sparks, which affects the coating and the surface condition of the strip.
- the transverse temperature uniformity is improved compared to a zig zag inductor.
- the coil can comprise several monospires whose mean planes are orthogonal to the longitudinal direction of the strip.
- the monospires can be linked together in series, or in parallel, or in series-parallel.
- Each monospire can have two long sides in relation to the width of the strip and two short sides in relation to the thickness of the strip.
- the current supply can be carried out on a long side or on a small side.
- the length of the long sides of the monospire is greater than the width of the strip by a value such that an accentuated heating effect at the edge of the strip is avoided.
- the heating device comprises, at each longitudinal end of the inductor coil with monospires, a short-circuit monospire closed on itself and whose mean plane is orthogonal to the longitudinal direction of the strip.
- the device may include an electromagnetic shield in order to contain the magnetic field essentially in a direction orthogonal to the plane of the strip.
- the device may include a field deflector to correct the temperature at the edge relative to the central zone of the strip.
- Fig.l is a schematic perspective view of a heating device with monospire according to the invention, crossed by a metal strip.
- Fig. is a schematic vertical section of a monospire with the metal strip inside.
- Fig.3 shows a variant of monospire, without representation of the band.
- Fig.4 shows another variant of monospire, similar to Fig.3.
- Fig. 5 and 6 show, in vertical section, two variant embodiments of a monospire surrounding a strip which moves horizontally.
- Fig.7 is a perspective diagram of a coil comprising three monospires connected in parallel with at each longitudinal end a short-circuit turn.
- Fig.8 is the electrical diagram of the parallel connection of the monospires of Fig.7.
- Fig. 9 is a perspective diagram of a coil composed of three monospires connected in series.
- Fig.10 is the wiring diagram of Fig.9.
- Fig. 11 is a perspective diagram of four monospires connected two by two in series-parallel.
- Fig.12 is the wiring diagram of Fig.11.
- a device for electromagnetic induction heating of a steel strip A or more generally of a metal strip.
- the strip A runs vertically along its vertical longitudinal direction D represented by an arrow.
- the heating device comprises at least one field coil B which surrounds an area of the strip A transversely to the longitudinal direction D.
- the coil B according to the invention, comprises at least one monospire 1, the mean plane P of which is orthogonal to the longitudinal direction D of the strip A.
- the monospire 1 is constituted by a flat conductor forming a rectangular outline whose long sides la, lb, are parallel to the large faces of the strip, and the short sides le, ld, parallel to the edge of the strip .
- the current supply is carried out on a large side lb according to Fig.l.
- This large side lb is open substantially at mid-length and has two lamellae L1, L2, folded at right angles outward relative to the plane of the side lb to allow connection to the power supply.
- Fig.2 shows an arrangement similar to Fig.l with a strip A which moves horizontally instead of the vertical displacement of Fig.l.
- Fig.3 illustrates an alternative embodiment according to which the current supply and the lamellae L1, L2, are provided in the median zone on a small side, for example the.
- the metal strip A is not shown in Fig. 3.
- Fig.4 shows a variant of the monospire according to which the current supply is ensured by lamellae L1, L2 provided at one of the ends of a small side, for example the.
- the length H (Fig. 2) of the long sides of the monospire 1 is greater than the width h of the strip by a value such as an accentuated heating effect at the edge of the band, that is to say along the banks Ac, Ad is avoided.
- H can be approximately 25% greater than h, with equal distribution of the difference in dimensions on either side of the longitudinal axis of the strip A.
- FIG. 5 illustrates an alternative embodiment according to which the distance E between the long sides of the monospire increases towards the ends of these long sides so that the accentuated heating effect at the edge Ac, Ad of the strip is even better avoided. According to Fig.
- the monospire 1 presents towards the ends of its long sides a trapezoidal contour Td, Te, the large base of which constitutes the small outer side le, ld, while the small base of the trapezium corresponds to the distance between the large sides of the monospire in the central region.
- the ends of the long sides of the monospire have a substantially circular contour Cd, this convex towards the outside, also favorable for limiting or eliminating the heating effect accentuated at the edge Ac
- Ad Fig.7 shows schematically in perspective a coil Bl comprising three identical monospires 1, 21 and 31 coaxial connected in parallel according to the electrical diagram of Fig.8.
- Each monospire 1, 21, 31 has its mean plane orthogonal to the longitudinal direction of the metal strip (not shown in Fig.7) which passes inside the turns.
- the supply of alternating electrical current, generally high frequency, is provided by conductors connected in parallel to the supply strips L1, L2 of each monospire.
- each longitudinal end of the coil Bl a short circuit monospire 4, 5 closed on itself, the mean plane of which is orthogonal to the longitudinal direction of the strip.
- These short circuit monospires 4, 5 allow the electromagnetic field lines to be closed, two of which are schematically represented in Me and Md, shortly after their exit from turns 4 and 5. This prevents the electromagnetic field from propagating further along the longitudinal direction of the strip, so that the possible disturbances created by this field on devices located downstream or upstream of the coil Bl are avoided.
- Fig.9 illustrates a coil B2 comprising three coaxial monospires 1, 21, 31 connected in series as illustrated by the electrical diagram in Fig.10.
- the mean plane of each monospire is orthogonal to the longitudinal direction D of the metal strip which is not shown in Fig. 9.
- the number of monospires connected in parallel or in series can be different from three, for example equal to two or more than three.
- Fig.11 shows schematically in perspective a series-parallel assembly of four monospires 1, 21, 31, 41 coaxial whose mean plane is orthogonal to the longitudinal direction D of the steel strip not shown.
- the monospires 1, 21 are connected in series as well as the monospires 31, 41. These two series groupings are connected in parallel as illustrated diagrammatically by FIG. 12.
- an electromagnetic shield for example with a magnetic circuit with sheets or ferrites, or a shield made of copper sheet, in order to contain the magnetic field essentially in a direction orthogonal to the plane of the strip.
- the heating device can operate in a controlled atmosphere or not.
- Field deflectors can be provided in particular to correct the temperature at the edge Ac, Ad, relative to the central zone of the strip.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Induction Heating (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0302892 | 2003-03-07 | ||
FR0302892A FR2852187A1 (fr) | 2003-03-07 | 2003-03-07 | Dispositif de chauffage par induction d'une bande metallique |
PCT/FR2004/000516 WO2004082336A1 (fr) | 2003-03-07 | 2004-03-04 | Dispositif de chauffage par induction d'une bande metallique. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1604551A1 EP1604551A1 (de) | 2005-12-14 |
EP1604551B1 EP1604551B1 (de) | 2008-10-15 |
EP1604551B8 true EP1604551B8 (de) | 2008-12-24 |
Family
ID=32865356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04717127A Revoked EP1604551B8 (de) | 2003-03-07 | 2004-03-04 | Vorrichtung zur induktiven erhitzung eines metallbandes |
Country Status (11)
Country | Link |
---|---|
US (1) | US7368689B2 (de) |
EP (1) | EP1604551B8 (de) |
JP (1) | JP2006523364A (de) |
CN (1) | CN100499948C (de) |
AT (1) | ATE411728T1 (de) |
BR (1) | BRPI0408135A (de) |
CA (1) | CA2518269A1 (de) |
DE (1) | DE602004017143D1 (de) |
ES (1) | ES2316967T3 (de) |
FR (1) | FR2852187A1 (de) |
WO (1) | WO2004082336A1 (de) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007081918A2 (en) * | 2006-01-09 | 2007-07-19 | Inductotherm Corp. | Electromagnetically shielded induction heating apparatus |
FR2902274B1 (fr) * | 2006-06-09 | 2008-08-08 | Celes Sa | Dispositif de chauffage par induction a haute frequence, et four a induction equipe d'un tel dispositif |
FR2944942B1 (fr) * | 2009-04-23 | 2011-07-22 | Fives Celes | Dispositif de chauffage par inducteur de puissance, inducteur de puissance, et four ainsi equipe |
MX339779B (es) * | 2010-01-06 | 2016-06-08 | Nippon Steel & Sumitomo Metal Corp * | Bobina de calentamiento por induccion y aparato y metodo para la fabricacion de un miembro procesado. |
JP5861831B2 (ja) * | 2011-07-28 | 2016-02-16 | Jfeスチール株式会社 | 鋼板の加熱装置 |
DE102012100509B4 (de) * | 2012-01-23 | 2015-10-08 | Thyssenkrupp Rasselstein Gmbh | Verfahren zum Veredeln einer metallischen Beschichtung auf einem Stahlband |
CN104775012B (zh) * | 2014-01-10 | 2017-02-08 | 宝山钢铁股份有限公司 | 均匀加热带钢的宽幅面感应加热装置 |
WO2016210084A1 (en) | 2015-06-24 | 2016-12-29 | Novelis Inc. | Fast response heaters and associated control systems used in combination with metal treatment furnaces |
CN105716382A (zh) * | 2016-04-15 | 2016-06-29 | 河南省西工机电设备有限公司 | 一种无电刷电阻加热的钢带烘干机 |
US11993823B2 (en) | 2016-05-10 | 2024-05-28 | United States Steel Corporation | High strength annealed steel products and annealing processes for making the same |
US11560606B2 (en) | 2016-05-10 | 2023-01-24 | United States Steel Corporation | Methods of producing continuously cast hot rolled high strength steel sheet products |
CA3026506A1 (en) | 2016-05-10 | 2017-11-16 | United States Steel Corporation | High strength steel products and annealing processes for making the same |
EP3335968B1 (de) | 2016-12-14 | 2019-04-10 | FCA Italy S.p.A. | Kraftfahrzeugbodenplattenstruktur mit seitlichen längsträgern mit örtlich unterschiedlichen merkmalen |
GB2557667A (en) * | 2016-12-15 | 2018-06-27 | Ab Skf Publ | Induction heating device |
EP3966355A1 (de) | 2019-05-07 | 2022-03-16 | United States Steel Corporation | Verfahren zur herstellung von stranggegossenen warmgewalzten hochfesten stahlblechprodukten |
CN110340161B (zh) * | 2019-07-25 | 2020-08-28 | 燕山大学 | 一种厚钢板在线轧制的加热装置、轧制装置及其轧制方法 |
CN114450427A (zh) | 2019-08-07 | 2022-05-06 | 美国钢铁公司 | 高延展性涂锌钢片材产品 |
BR112022003136A2 (pt) | 2019-08-19 | 2022-05-17 | United States Steel Corp | Produto de chapa de aço laminado de alta resistência, e, método para produzir um produto de chapa de aço laminado de alta resistência |
DE102019008622A1 (de) * | 2019-12-13 | 2021-06-17 | ABP lnduction Systems GmbH | Querfeldinduktionsheizeinrichtung |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6298588A (ja) * | 1985-10-25 | 1987-05-08 | 日本軽金属株式会社 | 横磁束型電磁誘導加熱装置 |
US4778971A (en) * | 1986-05-23 | 1988-10-18 | Kabushiki Kaisha Meidensha | Induction heating apparatus |
JPH01232685A (ja) * | 1988-03-11 | 1989-09-18 | Mitsubishi Heavy Ind Ltd | 鋼板誘導加熱装置 |
GB8902090D0 (en) * | 1989-01-31 | 1989-03-22 | Metal Box Plc | Electro-magnetic induction heating apparatus |
JPH0349561A (ja) * | 1989-07-14 | 1991-03-04 | Mitsubishi Heavy Ind Ltd | 合金化用誘導加熱における電源制御装置 |
JPH04294091A (ja) * | 1991-03-22 | 1992-10-19 | Mitsubishi Heavy Ind Ltd | 誘導加熱装置 |
JP3045007B2 (ja) * | 1994-06-17 | 2000-05-22 | 日本鋼管株式会社 | 金属板の誘導加熱方法及び装置 |
JP2001006864A (ja) * | 1999-06-25 | 2001-01-12 | Nkk Corp | 誘導加熱装置 |
FR2808163B1 (fr) * | 2000-04-19 | 2002-11-08 | Celes | Dispositif de chauffage par induction a flux transverse a circuit magnetique de largeur variable |
JP2002075628A (ja) * | 2000-08-31 | 2002-03-15 | Nippon Steel Corp | シングルターン型誘導加熱コイル |
-
2003
- 2003-03-07 FR FR0302892A patent/FR2852187A1/fr not_active Withdrawn
-
2004
- 2004-03-04 WO PCT/FR2004/000516 patent/WO2004082336A1/fr active Application Filing
- 2004-03-04 BR BRPI0408135-8A patent/BRPI0408135A/pt not_active Application Discontinuation
- 2004-03-04 US US10/548,296 patent/US7368689B2/en not_active Expired - Fee Related
- 2004-03-04 JP JP2006505696A patent/JP2006523364A/ja active Pending
- 2004-03-04 CN CNB2004800106566A patent/CN100499948C/zh not_active Expired - Fee Related
- 2004-03-04 DE DE602004017143T patent/DE602004017143D1/de not_active Expired - Lifetime
- 2004-03-04 AT AT04717127T patent/ATE411728T1/de not_active IP Right Cessation
- 2004-03-04 ES ES04717127T patent/ES2316967T3/es not_active Expired - Lifetime
- 2004-03-04 EP EP04717127A patent/EP1604551B8/de not_active Revoked
- 2004-03-04 CA CA002518269A patent/CA2518269A1/fr not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP1604551B1 (de) | 2008-10-15 |
CN100499948C (zh) | 2009-06-10 |
EP1604551A1 (de) | 2005-12-14 |
BRPI0408135A (pt) | 2006-03-01 |
FR2852187A1 (fr) | 2004-09-10 |
US20060151481A1 (en) | 2006-07-13 |
WO2004082336A1 (fr) | 2004-09-23 |
CA2518269A1 (fr) | 2004-09-23 |
US7368689B2 (en) | 2008-05-06 |
JP2006523364A (ja) | 2006-10-12 |
ES2316967T3 (es) | 2009-04-16 |
CN1778144A (zh) | 2006-05-24 |
DE602004017143D1 (de) | 2008-11-27 |
ATE411728T1 (de) | 2008-10-15 |
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