EP0637897B1 - Vorrichtung zum induktiven Längsfelderwärmen von flachem Metallgut - Google Patents
Vorrichtung zum induktiven Längsfelderwärmen von flachem Metallgut Download PDFInfo
- Publication number
- EP0637897B1 EP0637897B1 EP94111752A EP94111752A EP0637897B1 EP 0637897 B1 EP0637897 B1 EP 0637897B1 EP 94111752 A EP94111752 A EP 94111752A EP 94111752 A EP94111752 A EP 94111752A EP 0637897 B1 EP0637897 B1 EP 0637897B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inductors
- inductor
- conductor loops
- another
- active sections
- 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
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 14
- 230000006698 induction Effects 0.000 title description 5
- 239000004020 conductor Substances 0.000 claims abstract description 38
- 239000002184 metal Substances 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 230000001939 inductive effect Effects 0.000 claims abstract description 4
- 239000007769 metal material Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000005291 magnetic effect Effects 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 2
- 239000003302 ferromagnetic material Substances 0.000 claims description 2
- 238000009966 trimming Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- 210000001035 gastrointestinal tract Anatomy 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
Definitions
- the invention relates to a device for inductive Longitudinal field heating of flat metal goods, e.g. Tapes, Plates or the like made of non-ferrous metal, steel or a ferromagnetic material, with at least two with Alternating current, in particular medium-frequency alternating current, fed inductors, each provided with conductor loops are, the effective sections of which are each magnetic Generate alternating field.
- flat metal goods e.g. Tapes, Plates or the like made of non-ferrous metal, steel or a ferromagnetic material
- Alternating current in particular medium-frequency alternating current, fed inductors, each provided with conductor loops are, the effective sections of which are each magnetic Generate alternating field.
- the main advantage of the known device is the high Uniform heating over the entire width of the metal, being even at different widths achieve an even temperature distribution of the metal material leaves.
- this device also has some disadvantages on. Firstly, there is no satisfactory level of efficiency can be achieved in the heating when using metal material different widths and thicknesses should be heated. When changing to metal goods of different widths and / or thicknesses replacement inductors are required in the known device, to even with different dimensions of the To achieve good electrical efficiency. But this is a very cumbersome and uneconomical Procedure, as the entire plant is shut down must be and for example, for the continuous Operation usually attached metal strips separately and after installing the replacement inductor need to be reconnected. This creates considerable Production downtimes. Furthermore occur in the known Device on the induction coil on stray fields that the electrical efficiency of this heater further belittle.
- DE 39 28 629 A1 is a device known for inductive heating of flat metallic goods, which has at least two inductors, which are in pairs on opposite sides of the metal goods opposite. This device allows through separate Switching individual conductor loops an adjustment to different widths of the metallic goods. With this device, however, cross-field heating carried out, a lower compared to the longitudinal field heating Uniformity of heating across the entire width of the metal causes.
- the present invention has for its object a To design the device of the type mentioned in the introduction that it is adaptable to the respective metal goods width and easily accessible from outside for cleaning and maintenance work is to largely avoid production downtimes. It should also be achieved that the device can be produced inexpensively due to their design.
- the effective sections of the conductor loops can a straight line or one that deviates from a straight line Have course.
- the device according to the invention can also be designed in this way be that the effective sections of the conductor loops in Grooves of the inductor cores are arranged. This will become allows an even more compact design of the inductor, on the other hand the coupling of the magnetic lines of force improved on the iron core.
- the device according to the invention can also be designed in this way be that the inductors and the flat metal goods are relative are movable to each other.
- the inductors can be relative be moved to plates or the like. It is alike possible to arrange the inductors statically and the flat metal in the form of a ribbon or the like to move.
- the device according to the invention can also be designed in this way be that the effective sections of the conductor loops of the Inductors in the longitudinal, transverse or inclined direction of movement to get lost.
- the device according to the invention can also be designed in this way be that several inductor pairs arranged side by side are, their inductor cores jammed together or are integrally formed with each other.
- the Area of influence of an inductor unit to the respective requirements be adjusted.
- the current direction in the effective sections of the conductor loops adjacent Inductors can be the same or opposite.
- By such a way of arranging several placed side by side Inductors can increase electrical efficiency become.
- With different electrical polarity neighboring Inductors are formed according to the number of the inductors have several areas in the metal material in which closed eddy currents flow. This leads to one single closed eddy current path to an elevated electrical power density in the metal goods.
- using multiple inductors side by side is also a good coordination on the respective metal width possible.
- the device according to the invention can be designed that inductor pairs are clocked and offset in time from each other are switchable.
- inductor pairs are used Use, one of which is only a small number of conductor loops and is in a marginal or intermediate position to others Inductors located. This way the education counteracted by unwanted temperature shadows in the metal goods become.
- the device according to the invention can also be designed in this way be that several inductor cores one behind the other in the direction of movement are arranged.
- the effective sections the conductor loops of each other in the direction of movement following inductors the same or different Have inclinations to the transport direction to in this way to further help to even out the warming.
- the device according to the invention can also be designed in this way be that the intermediate areas of two adjacent inductors Trim cores are assigned. This way, a Compensation for any temperature shadows in the area between Causes inductors.
- the device according to the invention is designed that the effective sections of the conductor loops of a Inductor are connected in parallel to each other. On this way the number of returns can be reduced and so that the construction work can be reduced.
- the device according to the invention can also be designed in this way be that the effective sections of the conductor loops a Inductor pair lie in a common circuit.
- the device according to the invention can also be designed that the conductor loops for feedback on the side respective inductor core are guided.
- the device according to the invention can also be designed in this way be that the conductor loops effective sections in two form adjacent inductors.
- the device according to the invention can be designed in this way be that conductor loops of at least one inductor are separately switchable.
- the device can be connected to the Width of the goods to be heated can be adjusted without it to require any conversions.
- the inductors 1,2 are equally designed and have one another an iron core 4.5 each.
- a receptacle 6 is provided on each side of the iron cores 4, 5, in which the effective sections 7 from here on conductor loops shown running parallel to each other are arranged. All effective sections 7 of the Conductor loops of the upper inductor 1 are the same Direction through which current flows. This also applies to all effective ones Sections 7 of the lower inductor 2 except that the current direction is reversed here.
- the effective sections 7, the conductor loops can in the recordings 6 be embedded in suitable material or run in grooves not shown here.
- Fig. 1 can be seen as a juxtaposition of two pairs of inductors 3 can be understood.
- the iron cores 4,5 are included in one piece for the inductors 1,1 'and 2,2'.
- Fig. 1 are all effective sections 7 of the conductor loops arranged in grooves 9 of the iron cores 4, 5, the current direction in the effective sections 7 of the inductors 1, 2 ' is equal to. Also have the same current direction with each other the effective sections 7 in the inductors 2.1 'with the Exception that the current is in the opposite direction flows as in the inductors 1, 2 '.
- the embodiment of the device according to FIG. 1 can Area of transition between the inductors 1, 1 'or 2,2 'a trimming core 10 may be connected in order here, if necessary to compensate for temperature shadows. This is illustrated in Fig. 2, in which the arrow 11 as well 1 shows the direction of movement of the metal goods 3.
- Fig. 4 is to be understood as a supplement to Fig. 1 by not only the effective sections 7 of the conductor loops, but also identifies their return. This happens provided on the sides of the iron cores 4,5 in there Recesses 19.
- FIG. 5 shows an upper inductor 1 with an iron core 4 and a lower inductor 2 with an iron core 5. Grooves 9 are provided in the iron cores 4, 5, in which there are effective sections 7 of conductor loops are located. All effective sections are 7 of the upper inductor 1 parallel to each other in a circuit switched in which all effective sections 7th parallel to each other, but with opposite polarity are switched.
- Fig. 6 shows schematically two in the direction of movement (Arrow 11) of the metal goods 3 arranged one behind the other Inductors 1, in which the effective sections of the Conductor loops are offset from each other by 90 °.
- All inductors are connected to a medium frequency AC source connected.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Induction Heating (AREA)
- Furnace Details (AREA)
Description
- Fig. 1:
- eine Ausführungsform der erfindungsgemäßen Vorrichtung mit zwei Induktoren auf jeder Seite des zu erwärmenden Gutes,
- Fig. 2:
- eine Draufsicht auf die in Fig. 1 dargestellte Ausführungsform mit zusätzlichem Trimmkern,
- Fig. 3:
- eine Ausführungsform der erfindungsgemäßen Vorrichtung mit jeweils einem Induktor auf jeder Seite des zu erwärmenden Gutes,
- Fig. 4:
- eine Ausführungsform der Erfindung, bei der die Leiterschleifen seitlich eines Induktorkerns zurückgeführt sind,
- Fig. 5:
- eine perspektivische Ansicht einer weiteren Ausführungsform der erfindungsgemäßen Vorrichtung mit zwei übereinander angeordneten Induktoren, wobei die wirksamen Abschnitte der Leiterschleifen parallel zueinander geschaltet sind und
- Fig. 6:
- eine Draufsicht auf eine weitere Ausführungsform der erfindungsgemäßen Vorrichtung, bei der zwei Induktoren in Bewegungsrichtung des Gutes hintereinander angeordnet sind.
Claims (12)
- Vorrichtung zum induktiven Längsfelderwärmen von flachem Metallgut (3), wie z.B. Bändern, Platten oder dergleichen aus Nichteisenmetall, Stahl oder einem ferromagnetischen Werkstoff, mit mindestens zwei mit Wechselstrom, insbesondere mittelfrequentem Wechselstrom, gespeisten Induktoren (1,2,1',2'), die jeweils mit Leiterschleifen versehen sind, deren wirksame Abschnitte (7) je ein magnetisches Wechselfeld erzeugen,
dadurch gekennzeichnet,daß die wirksamen Abschnitte (7) der Leiterschleifen jedes Induktors (1,2,1',2') parallel zueinander laufen und parallel zueinander geschaltet sind,daß jeweils zwei Induktoren (1,2,1',2') paarweise einander zugeordnet sind, derart, daß sie einander gegenüberliegen und auf verschiedenen Seiten des flachen Metallgutes (3) anzuordnen sind unddaß die wirksamen Abschnitte (7) der Leiterschleifen der beiden Induktoren (1,2,1',2') eines Paares in entgegengesetzten Richtungen von Strom durchflossen sind. - Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die wirksamen Abschnitte (7) der Leiterschleifen in Nuten (9;13) der Induktorkerne (4,5,12) angeordnet sind.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Induktoren (1,2,1',2') und das flache Metallgut (3) relativ zueinander bewegbar sind.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die wirksamen Abschnitte (7) der Leiterschleifen der Induktoren (1,2,1',2') in Bewegungsrichtung (11) längs, quer oder geneigt dazu verlaufen.
- Vorrichtung nach einem vorhergehenden Ansprüche, dadurch gekennzeichnet, daß mehrere Induktorpaare nebeneinander angeordnet sind, wobei ihre Induktorkerne (4,5,12) miteinander verklemmt oder miteinander einstückig ausgebildet sind.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß Induktorpaare getaktet und zeitversetzt zueinander schaltbar sind.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß mehrere Induktorkerne (4,5,12) in Bewegungsrichtung (11) hintereinander angeordnet sind.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß den Zwischenbereichen zweier benachbarter Induktoren (1,2,1',2') Trimmkerne (10) zugeordnet sind.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die wirksamen Abschnitte (7) der Leiterschleifen eines Induktorpaares in einem gemeinsamen Stromkreis liegen.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Leiterschleifen zur Rückführung seitlich am jeweiligen Induktorkern (4,5,12) geführt sind.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Leiterschleifen wirksame Abschnitte (7) in zwei benachbarten Induktoren (1,2,1',2') bilden.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß Leiterschleifen mindestens eines Induktors (1,2,1',2') getrennt schaltbar sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4325868 | 1993-08-02 | ||
DE4325868A DE4325868C2 (de) | 1993-08-02 | 1993-08-02 | Vorrichtung zum induktiven Längsfelderwärmen von flachem Metallgut |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0637897A2 EP0637897A2 (de) | 1995-02-08 |
EP0637897A3 EP0637897A3 (de) | 1995-09-20 |
EP0637897B1 true EP0637897B1 (de) | 2000-01-19 |
Family
ID=6494253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94111752A Expired - Lifetime EP0637897B1 (de) | 1993-08-02 | 1994-07-28 | Vorrichtung zum induktiven Längsfelderwärmen von flachem Metallgut |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0637897B1 (de) |
JP (1) | JPH07153560A (de) |
AT (1) | ATE189097T1 (de) |
DE (2) | DE4325868C2 (de) |
DK (1) | DK0637897T3 (de) |
ES (1) | ES2144020T3 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5844213A (en) * | 1990-01-31 | 1998-12-01 | Inductotherm Corp. | Induction heating coil assembly for prevention of circulating currents in induction heating lines for continuous-cast products |
DE19827577C1 (de) * | 1998-06-20 | 1999-10-28 | Abg Allg Baumaschinen Gmbh | Einbaubohle für einen Straßenfertiger |
KR100998962B1 (ko) * | 2003-07-21 | 2010-12-09 | 매그나칩 반도체 유한회사 | 코어부를 삽입한 인덕터 제조방법 |
JP2008226780A (ja) * | 2007-03-15 | 2008-09-25 | Mitsui Eng & Shipbuild Co Ltd | 誘導加熱装置 |
KR102196842B1 (ko) | 2016-03-30 | 2020-12-30 | 닛폰세이테츠 가부시키가이샤 | 유도 가열 장치 및 유도 가열 방법 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3725629A (en) * | 1971-07-16 | 1973-04-03 | Park O Ind Inc | Slab heating device |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE501964A (de) * | ||||
US2448011A (en) * | 1944-09-09 | 1948-08-31 | Westinghouse Electric Corp | Method and apparatus for induction heating of metal strips |
US2902572A (en) * | 1957-03-05 | 1959-09-01 | Penn Induction Company | Induction heating of metal strip |
US3731040A (en) * | 1971-09-24 | 1973-05-01 | Park Ohio Industries Inc | Billet heating coil |
CA1320900C (en) * | 1986-08-06 | 1993-08-03 | Jerome B. Zeldis | Assay to detect the presence of live virus in vitro |
US4761530A (en) * | 1987-04-03 | 1988-08-02 | National Steel Corporation | Electric induction heat treating furnace |
DE3928629A1 (de) * | 1989-08-30 | 1991-03-14 | Junker Gmbh O | Vorrichtung zum induktiven erwaermen von flachem metallischem gut |
GB2262420B (en) * | 1991-12-03 | 1995-02-08 | Electricity Ass Tech | Induction heating apparatus |
-
1993
- 1993-08-02 DE DE4325868A patent/DE4325868C2/de not_active Expired - Fee Related
-
1994
- 1994-07-28 DK DK94111752T patent/DK0637897T3/da active
- 1994-07-28 EP EP94111752A patent/EP0637897B1/de not_active Expired - Lifetime
- 1994-07-28 DE DE59409084T patent/DE59409084D1/de not_active Expired - Fee Related
- 1994-07-28 AT AT94111752T patent/ATE189097T1/de not_active IP Right Cessation
- 1994-07-28 ES ES94111752T patent/ES2144020T3/es not_active Expired - Lifetime
- 1994-08-01 JP JP6180270A patent/JPH07153560A/ja not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3725629A (en) * | 1971-07-16 | 1973-04-03 | Park O Ind Inc | Slab heating device |
Also Published As
Publication number | Publication date |
---|---|
EP0637897A3 (de) | 1995-09-20 |
DE4325868C1 (de) | 1995-01-12 |
DE4325868C2 (de) | 1997-11-13 |
DK0637897T3 (da) | 2000-07-10 |
ES2144020T3 (es) | 2000-06-01 |
JPH07153560A (ja) | 1995-06-16 |
DE59409084D1 (de) | 2000-02-24 |
EP0637897A2 (de) | 1995-02-08 |
ATE189097T1 (de) | 2000-02-15 |
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