EP0489772A1 - Vorrichtung zum induktiven erwärmen von flachem metallischem gut. - Google Patents
Vorrichtung zum induktiven erwärmen von flachem metallischem gut.Info
- Publication number
- EP0489772A1 EP0489772A1 EP90912636A EP90912636A EP0489772A1 EP 0489772 A1 EP0489772 A1 EP 0489772A1 EP 90912636 A EP90912636 A EP 90912636A EP 90912636 A EP90912636 A EP 90912636A EP 0489772 A1 EP0489772 A1 EP 0489772A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inductor
- current
- inductors
- current conductors
- conductors
- 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.)
- Granted
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
Definitions
- the invention relates to a device for inductive heating of flat metallic material, e.g. Bands and plates, with at least one pair of inductors, which forms an intermediate space for the passage of the goods and whose inductors have an iron core formed from transformer sheets, which has grooves in which, in some cases, switchable current conductors are arranged.
- flat metallic material e.g. Bands and plates
- inductors which forms an intermediate space for the passage of the goods and whose inductors have an iron core formed from transformer sheets, which has grooves in which, in some cases, switchable current conductors are arranged.
- Each inductor consists of an iron core with a series of recessed grooves in which the current conductors of the inductor are embedded. These conductors run transversely to or in the transport direction of the goods. The uniformity of heating across the width of the material be ⁇ rides in these inductive Erisser 'always mung devices problems, especially if the device you with guerrilla different width is to operate.
- EP-PS 0 150 793 In order to approach the goal of uniform heating of flat metallic material of different widths, it is proposed in EP-PS 0 150 793 to divide the inductor into several inductor sections arranged next to one another, which extend in the longitudinal direction and each with its own inductor winding and have their own magnetic circuit.
- the spacing of the inductor sections from one another can be changed or adapted in accordance with the respective width of the goods.
- electrical means are present to control the electrical currents in the inductor windings.
- An adaptation to the crop width can be achieved by switching the outer inductor sections on and off.
- an inductive heating device is described in DE-PS 884 811, which has two or more meandering curved inductive heating conductors arranged one behind the other in the feed direction and offset one or more times.
- a major disadvantage of this known device is that although uniform heating may be achieved for a certain good width to be heated, satisfactory uniform heating can then no longer be achieved in the case of different good widths.
- the object of the present invention is to design a device of the type mentioned at the outset in such a way that the disadvantages of the known relevant devices are avoided and that even with different crop widths over the respective width, a uniform heating pattern is achieved with a simple construction of the inductors.
- the iron cores of at least one inductor run in a zigzag or undulating manner in the transport direction of the goods Have grooves whose inclination with respect to the transport direction is at most 60 ° and into which the current conductors are inserted following the course of the groove, and that the inductors of at least one pair of inductors have a plurality of current conductors arranged next to one another and through which current flows in the same direction.
- the zigzag or wave-shaped current conductors in the correspondingly arranged grooves of the iron core ensure that the duration of action of a current conductor on the section of the material to be heated which is covered by it is uniform, so that in this section a uniform Warming occurs.
- the zigzag or wave-shaped course offers particularly advantageous possibilities for arranging adjacent current conductors in a particularly evenly distributed manner. In this case, spikes or waves of current conductors designed in this way can intervene in corresponding free spaces of adjacent conductors and, in contrast, be offset. Such a uniform arrangement cannot be used, in particular, in the case of such known current conductors which are composed of essentially rectangular conductor sections.
- the device according to the invention can also be designed such that the current conductors through which current flows in the same direction each have a conductor part running in the transport direction of the goods and a conductor part running counter to this transport direction.
- the device according to the invention can also be designed such that the current conductors which are arranged next to one another in the same direction through which the current flows are arranged symmetrically to the longitudinal inductor means 1. This means that in particular an adaptation to different crop widths is facilitated.
- the device according to the invention can also be designed such that there is at least one current conductor in each groove of an iron core.
- each inductor has two mechanically separated inductor parts which are arranged one behind the other and have grooves for receiving current conductors.
- Such a divided inductor offers the possibility of causing an offset of the inductor parts and thus a further equalization * of the heating. The costs incurred are lower than when using two separate inductors.
- the device according to the invention can also be designed such that the two inductor parts can be displaced relative to one another essentially transversely to the transport direction. This also makes the action of the current conductors and thus the heating of the goods more uniform.
- the device according to the invention can also be designed such that the pole width of the inductors can be changed.
- the device according to the invention can also be designed such that the current conductor located on a good edge or a plurality of current conductors located on the good edge is or are electrically short-circuited with the current conductor that follows next to the transport direction.
- a damper winding that promotes equalization is built up here.
- the device according to the invention can also be designed such that when using a plurality of pairs of inductors, each pair of inductors is connected to a separate current source, each with a different frequency.
- the use was also different! adjusted frequencies can promote uniform heating across the width of the crop.
- the device according to the invention can also be designed such that the current conductor (s) located at the edge of the crop is or are connected to a current source with a different frequency than the current conductors located in the central goods zone. In this way too, the equalization can be further promoted.
- the device according to the invention can also be designed such that the longitudinal center line of at least one inductor is inclined by 3 ° to 6 ° against the transport direction.
- the device according to the invention can also be designed such that the iron core and current conductor of one inductor are pivoted by 180 ° with respect to iron core and current conductors of the other inductor of a pair of inductors.
- the device according to the invention can be designed such that the iron cores of a pair of inductors are arranged offset from one another.
- FIG. 1 shows a schematic view of the side of an inductor according to the invention facing a material to be heated
- FIG. 2 is a side view of the device of FIG. 1,
- Fig. 3 is a circuit diagram of an inductor according to the invention.
- Fig. 4 shows a further circuit diagram of an inductor according to the invention.
- the embodiment of the device for inductive heating according to the invention shown in FIGS. 1 and 2 has four inductors 1,2,3,4.
- the inductors 1 and 2 form a pair of inductors and the inductors 3 and 4 form a further pair of inductors.
- the inductors of a pair of inductors lie on opposite sides of a strip-like material 4 'which is guided through a gap 5 in the pairs of inductors.
- the inductors 1, 2, 3, 4 are each in two inductor parts 6, 7; 8.9; 10.11; 12, 13 divided.
- Each inductor part 8.9 has an iron core 14.15.
- These egg cores 14, 15 are provided with a series of zigzag grooves 17 - 23 and 25 - 31 extending in the transport direction of the good 4 'shown by the arrow 16.
- Current conductors 32-38 and 40-46 are arranged in these grooves in accordance with the course of the groove. The formation of the current conductors .32 - 38 and 40 - 46 and their arrangement in the slots 17 - 23 and 25 - 31 is carried out in the usual way.
- the current conductors are usually equipped with an inner cooling channel (not shown) for the flow of a cooling medium.
- the space between the groove and the current conductor is filled with a suitable casting compound, on the one hand to create a good hold for the current conductor in the groove and on the other hand to ensure good heat transfer between the current conductor and the iron core and thus to ensure intensive cooling of the iron core ⁇ most.
- the inductor parts 8, 9 are offset relative to one another transversely to the transport direction 16 and can be displaced relative to one another in this direction by known mechanical means in order to change the offset.
- the current conductors are then designed to be flexible in the area between the inductor parts 8, 9.
- the inclination of the grooves 17-23 and 25-31 and thus also the inclination of the current conductors 32-38 and 40-46 with respect to the transport direction 16 is approximately 15 °.
- the inductor 4 with the inductor parts 12, 13 is laterally offset with respect to the inductor 2 with the inductor parts 8, 9 in order to achieve a uniform, optimal temperature distribution in the material 4.
- the inductor 4 can also be provided with grooves and conductor loops running transversely to the transport direction 16.
- Each current conductor or each conductor loop consists of two conductor parts inserted into a groove in the iron core. These conductor parts are electrically connected to one another at one inductor end via transverse connections, while at the other inductor end they can each be connected to a predetermined phase of a power network RS via switching means.
- the inductor has the active current conductors 64 and 78, 66 and 76, 69 and 73 as well as 70 and 72, which are connected via switches 79, 79 '; 80.80 '; 81.81 '; 82, 82 'and 83, 83' 'can be connected in pairs and independently of one another by the other conductors to the power network RS.
- the current conductors 65, 68, 71, 74 and 77 are not used in this case. They are kept in reserve for other types of switching.
- the described device in its various embodiments, makes it possible to heat flat metallic goods of different widths uniformly over the entire width of the goods through the zigzag or wave-shaped course of the current conductors in conjunction with the separate switchability of the individual conductor loops.
- the outer current conductors can be switched on or off in order to achieve the greatest possible temperature uniformity in the material to be heated.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3928629A DE3928629A1 (de) | 1989-08-30 | 1989-08-30 | Vorrichtung zum induktiven erwaermen von flachem metallischem gut |
DE3928629 | 1989-08-30 | ||
PCT/DE1990/000654 WO1991003916A1 (de) | 1989-08-30 | 1990-08-27 | Vorrichtung zum induktiven erwärmen von flachem metallischem gut |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0489772A1 true EP0489772A1 (de) | 1992-06-17 |
EP0489772B1 EP0489772B1 (de) | 1994-08-03 |
Family
ID=6388155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90912636A Expired - Lifetime EP0489772B1 (de) | 1989-08-30 | 1990-08-27 | Vorrichtung zum induktiven erwärmen von flachem metallischem gut |
Country Status (8)
Country | Link |
---|---|
US (1) | US5336868A (de) |
EP (1) | EP0489772B1 (de) |
JP (1) | JPH081829B2 (de) |
AT (1) | ATE109609T1 (de) |
DE (2) | DE3928629A1 (de) |
DK (1) | DK0489772T3 (de) |
ES (1) | ES2060194T3 (de) |
WO (1) | WO1991003916A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5847370A (en) * | 1990-06-04 | 1998-12-08 | Nordson Corporation | Can coating and curing system having focused induction heater using thin lamination cores |
EP0487832A3 (en) * | 1990-11-30 | 1992-06-17 | Sumitomo Heavy Industries, Ltd | Electromagnetic induction heater capable of realizing a wide variety of heating rates |
GB2262420B (en) * | 1991-12-03 | 1995-02-08 | Electricity Ass Tech | Induction heating apparatus |
DE4240700C2 (de) * | 1992-12-03 | 2003-11-06 | Carl Kramer | Vorrichtung zum schwebend Führen einer bewegten Warenbahn |
DE4325868C2 (de) * | 1993-08-02 | 1997-11-13 | Junker Gmbh O | Vorrichtung zum induktiven Längsfelderwärmen von flachem Metallgut |
ATE173875T1 (de) * | 1994-06-15 | 1998-12-15 | Junker Gmbh O | Vorrichtung zur induktiven querfelderwärmung von flachem metallischem gut |
AU3386497A (en) * | 1996-06-06 | 1998-01-05 | Fleetwood Systems Inc. | Liner compound curing apparatus with rf induction heating |
US5739506A (en) * | 1996-08-20 | 1998-04-14 | Ajax Magnethermic Corporation | Coil position adjustment system in induction heating assembly for metal strip |
DE10013061C2 (de) * | 2000-03-19 | 2003-10-30 | Univ Hannover | Querfeld-Erwärmungsanlage |
US6770858B2 (en) * | 2000-08-29 | 2004-08-03 | Otto Junker Gmbh | Device for inductively heating metallic strips |
DE10312623B4 (de) * | 2003-03-19 | 2005-03-24 | Universität Hannover | Querfeld-Erwärmungsanlage |
TWI326713B (en) * | 2005-02-18 | 2010-07-01 | Nippon Steel Corp | Induction heating device for heating a traveling metal plate |
JP4786365B2 (ja) * | 2005-02-18 | 2011-10-05 | 新日本製鐵株式会社 | 金属板の誘導加熱装置及び誘導加熱方法 |
US9888529B2 (en) * | 2005-02-18 | 2018-02-06 | Nippon Steel & Sumitomo Metal Corporation | Induction heating device for a metal plate |
CN101120617B (zh) * | 2005-02-18 | 2011-01-19 | 新日本制铁株式会社 | 用于金属板的感应加热装置 |
WO2016210084A1 (en) | 2015-06-24 | 2016-12-29 | Novelis Inc. | Fast response heaters and associated control systems used in combination with metal treatment furnaces |
DE102019218391A1 (de) * | 2019-11-27 | 2021-05-27 | Thyssenkrupp Ag | Induktor zum Vorschub-Randschichthärten |
EP3941157A1 (de) | 2020-07-15 | 2022-01-19 | ABP Induction Systems GmbH | Verfahren und anlage zum induktiven erwärmen von flachgut |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE767369C (de) * | 1941-06-17 | 1952-06-19 | Deutsche Edelstahlwerke Ag | Elektrische Spule oder Leiterschleife zum induktiven Erhitzen von Werkstuecken |
DE884811C (de) * | 1942-10-25 | 1953-07-30 | Deutsche Edelstahlwerke Ag | Elektroinduktive Heizvorrichtung zum fortschreitenden Oberflaechenhaerten metallischer Werkstuecke |
GB593195A (en) * | 1944-02-05 | 1947-10-10 | Westinghouse Electric Int Co | Improvements in or relating to heating of strip metal, and the like by electromagnetic induction |
US2722589A (en) * | 1950-11-30 | 1955-11-01 | Ohio Crankshaft Co | Method and apparatus for uniformly heating intermittently moving metallic material |
US2754397A (en) * | 1953-05-22 | 1956-07-10 | Allis Chalmers Mfg Co | Multiple plate work coil with offset edges for induction heating |
DE1224345B (de) * | 1962-01-11 | 1966-09-08 | Aeg | Induktor fuer das Oberflaechenerwaermen von Zahnraedern |
DE1158194B (de) * | 1962-06-22 | 1963-11-28 | Zd Y Elektrotepelnych Zarizeni | Induktoranordnung zur induktiven Erwaermung von durchlaufenden Metallbaendern |
US3424886A (en) * | 1966-10-27 | 1969-01-28 | Ajax Magnethermic Corp | Induction heating |
US3444346A (en) * | 1966-12-19 | 1969-05-13 | Texas Instruments Inc | Inductive heating of strip material |
US4195214A (en) * | 1976-06-28 | 1980-03-25 | The Continental Group, Inc. | Apparatus for induction heating of metal plates with holes |
US4313433A (en) * | 1979-10-09 | 1982-02-02 | Cramer Products, Inc. | Ankle stabilizer |
JPS6321118Y2 (de) * | 1981-03-17 | 1988-06-10 | ||
FR2558941B1 (fr) * | 1984-01-26 | 1986-05-02 | Cem Comp Electro Mec | Dispositif de chauffage de produits plats au defile par induction electromagnetique |
JPS60255930A (ja) * | 1984-05-31 | 1985-12-17 | Dai Ichi High Frequency Co Ltd | 枝付管の溶接部における残留応力改善のための加熱方法及び加熱装置 |
FR2573947B1 (fr) * | 1984-11-29 | 1987-01-02 | Cem Comp Electro Mec | Dispositif de chauffage de produits plats au defile par induction electromagnetique selon un maillage carre |
GB8505811D0 (en) * | 1985-03-06 | 1985-04-11 | Bekaert Sa Nv | Induction heating |
US4778971A (en) * | 1986-05-23 | 1988-10-18 | Kabushiki Kaisha Meidensha | Induction heating apparatus |
GB8721663D0 (en) * | 1987-09-15 | 1987-10-21 | Electricity Council | Induction heating apparatus |
US5025122A (en) * | 1989-11-03 | 1991-06-18 | Ajax Magnethermic Corporation | Induction heater with axially-aligned coils |
-
1989
- 1989-08-30 DE DE3928629A patent/DE3928629A1/de active Granted
-
1990
- 1990-08-27 WO PCT/DE1990/000654 patent/WO1991003916A1/de active IP Right Grant
- 1990-08-27 JP JP2511701A patent/JPH081829B2/ja not_active Expired - Lifetime
- 1990-08-27 EP EP90912636A patent/EP0489772B1/de not_active Expired - Lifetime
- 1990-08-27 DE DE59006721T patent/DE59006721D1/de not_active Expired - Fee Related
- 1990-08-27 AT AT90912636T patent/ATE109609T1/de not_active IP Right Cessation
- 1990-08-27 US US07/835,975 patent/US5336868A/en not_active Expired - Fee Related
- 1990-08-27 DK DK90912636.9T patent/DK0489772T3/da active
- 1990-08-27 ES ES90912636T patent/ES2060194T3/es not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9103916A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59006721D1 (de) | 1994-09-08 |
DE3928629A1 (de) | 1991-03-14 |
EP0489772B1 (de) | 1994-08-03 |
WO1991003916A1 (de) | 1991-03-21 |
DK0489772T3 (da) | 1994-12-05 |
JPH04507324A (ja) | 1992-12-17 |
JPH081829B2 (ja) | 1996-01-10 |
ATE109609T1 (de) | 1994-08-15 |
DE3928629C2 (de) | 1992-01-09 |
US5336868A (en) | 1994-08-09 |
ES2060194T3 (es) | 1994-11-16 |
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