EP0024319A1 - Process for making E-shaped core laminations and I-shaped yoke laminations for a choke or transformer, particularly for gas discharge lamps - Google Patents

Process for making E-shaped core laminations and I-shaped yoke laminations for a choke or transformer, particularly for gas discharge lamps Download PDF

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Publication number
EP0024319A1
EP0024319A1 EP80104497A EP80104497A EP0024319A1 EP 0024319 A1 EP0024319 A1 EP 0024319A1 EP 80104497 A EP80104497 A EP 80104497A EP 80104497 A EP80104497 A EP 80104497A EP 0024319 A1 EP0024319 A1 EP 0024319A1
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EP
European Patent Office
Prior art keywords
shaped
shaped core
outer legs
punched out
sheets
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EP80104497A
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German (de)
French (fr)
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EP0024319B1 (en
Inventor
Bernhard Albeck
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Vossloh Schwabe GmbH
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SCHWABE GmbH and CO KG ELEKTROTECHNISCHE FABRIK
Schwabe & Co KG Elektrotechnische Fabrik GmbH
SCHWABE KG ELEKTROTECH FAB
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Application filed by SCHWABE GmbH and CO KG ELEKTROTECHNISCHE FABRIK, Schwabe & Co KG Elektrotechnische Fabrik GmbH, SCHWABE KG ELEKTROTECH FAB filed Critical SCHWABE GmbH and CO KG ELEKTROTECHNISCHE FABRIK
Priority to AT80104497T priority Critical patent/ATE3480T1/en
Publication of EP0024319A1 publication Critical patent/EP0024319A1/en
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Publication of EP0024319B1 publication Critical patent/EP0024319B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0233—Manufacturing of magnetic circuits made from sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented

Definitions

  • the invention relates to a method for producing E-shaped core sheets and matching I-shaped backing sheets of a choke or a transformer between their outer legs, in particular for use as a ballast for gas discharge lamps.
  • a sheet metal cut for a jacket core is also known, which is formed from E-shaped core sheets and I-shaped backing sheets, the I-shaped backing sheets being inserted between the legs of the E-shaped core sheets.
  • the aim here is to use a casing core regardless of the lamella shape by means of the casing casing and To enclose the floor in such a way that no magnetic scatter occurs, and to press the slats firmly against each other.
  • the invention has for its object to design the manufacturing process for the lamellae such that not only the E-shaped core plate and the I-shaped yoke plate are punched with little or no waste, but the lamellae can be arranged in the magnetic circuit in such a way that the air gap can be adjusted as required.
  • the two recesses can be punched out on them with a single stamp, which also achieves a more stable design of this tool part. Furthermore, the advantage of the stamping process is that, in addition to the two recesses, a recess in the middle leg of the E-shaped core sheet, which serves to accommodate an air gap insert, can be punched out by a corresponding design of the stamp.
  • E-shaped core sheets are punched out with the open sides opposite and adjacent to one another (DE-OS 2 638 780 ).
  • the ends of the adjoining outer legs of two adjacent E-shaped core sheets overlap each other, and the space left between the outer legs over the middle leg of an E-shaped core sheet is filled by the two L-shaped backing sheets folded into a rectangle.
  • This known design of the E-shaped core plate and the L-shaped yoke plates has the disadvantage that the laminated core consists of three parts and therefore does not have sufficient strength, since the L-shaped middle parts can be tipped over.
  • the punching method according to the invention can advantageously be designed such that the I-shaped back plate is made longer than the free space between the outer legs of the E-shaped core plate. This ensures that the package of I-shaped yoke plates can be inserted under tension between the outer legs.
  • the same goal can also be achieved by punching out the ends of the I-shaped yoke plate with a bevel, but with the additional advantage that the introduction of the I-packet between the outer legs of the E-packet is facilitated.
  • the width of the I-shaped yoke plate is increased or decreased.
  • a larger or smaller window height between the outer legs and the middle leg of the E-shaped core sheet is achieved without waste iron material.
  • the stamping method according to the invention is preferably used to produce a flat design of a choke, with no waste of iron material occurring. However, there are cases that require a higher design of the throttle without changing the width.
  • a major advantage of the punching method according to the invention is that when an air gap is required between the center leg of the E-shaped core plate and the I-shaped back plate as a result of the shortening of the center leg, the outer leg is lengthened by the amount of the air gap, which means that there is no additional Iron material an enlarged changing room is formed.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Processing Of Solid Wastes (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

1. A method for making E-shaped core plates (1) and I-shaped return plates (2) fitting between the outer legs (6) of the same, for a choke or a transformer, in particular for use as an adapter for gas-discharge lamps, characterized in that two rows of E-shaped core plates (1) are punched with the open sides facing each other and abutting each other in offset arrangement so that the ends (10) of the abutting outer legs (6) of two neighbouring E-shaped core plates (1) abut the end of the middle leg (3) of the opposite offset E-shaped core plate and that the I-shaped return plates (2) are punched from the clear spaces formed between the outer legs (6) and the middle legs (3) of the E-shaped core plates (1) facing each other.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen E-förmiger Kernbleche und zwischen deren Außenschenkel passender I-förmiger Rückschlußbleche einer Drossel oder eines Transformators insbesondere für die Verwendung als Vorschaltgerät für Gasentladungslampen.The invention relates to a method for producing E-shaped core sheets and matching I-shaped backing sheets of a choke or a transformer between their outer legs, in particular for use as a ballast for gas discharge lamps.

Mit dem abfallosen Herstellen der E-förmigen Kernbleche und der I-förmigen Rückschlußbleche für Mantelkerne nach DIN 41300 Bl.2 ist bereits ein Stanzverfahren bekannt, bei dem zwei E-förmige Kernbleche mit den Schenkeln derart gegeneinander gekehrt sind, daß zwei I-förmige Rückschluß bleche durch Ausstanzen der zwischen den Schenkeln befindlichen Räume gebildet werden. Dieser Blechschnitt läßt sich zwar ohne Stanzabfall herstellen, jedoch ist nachteilig, daß der Luftspalt zwischen dem Mittelschenkel der E-förmigen Kernbleche und den I-förmigen Rückschlußblechen durch die Festlegung im Stanzwerkzeug eine bestimmte Größe hat. Es fehlt damit die Möglichkeit, die Luftspaltgröße zwecks Ausschaltung von Fertigungstoleranzen auf einen gewünschten Wert einzustellen. Somit ist es auch nicht möglich, mit diesem bekannten Stanzverfahren bei optimaler Ausnutzung des Wickelraumes den einer beliebigen Impedanz zugeordneten Luftspalt zu erzeugen. Selbst mit dem hohen Aufwand von mehreren verschiedenen Stanzwerkzeugen ließe sich nur eine grobe Abstufung erreichen. Außerdem führt das Ausstanzen des für jede Wicklung erforderlichen Luftspaltes zu einem zusätzlichen Fertigungsaufwand, der bei den hohen Lohnkosten nicht tragbar ist. Es wäre zwar möglich, Luftspalteinlagen zwischen den Enden der Außenschenkel des E-förmigen Kernblechs und den Enden des I-förmigen Rückschlußbleches anzuordnen. Das erfordert. jedoch nicht nur eine aufwendigere Montageanordnung für den Zusammenhalt der E- und I-Lamellen, sondern als Folge der äußeren Luftspalte entsteht auch ein magnetischer Streufluß, der zu störenden Brummgeräuschen führen kann.With the waste-free manufacture of the E-shaped core sheets and the I-shaped backing sheets for jacket cores according to DIN 41300 Bl.2, a stamping process is already known in which two E-shaped core sheets with the legs are turned against each other in such a way that two I-shaped inference sheets are formed by punching out the spaces located between the legs. This sheet metal cut can be produced without punching waste, but it is disadvantageous that the air gap between the middle leg of the E-shaped core sheets and the I-shaped backing sheets has a certain size by being fixed in the punching tool. Something is missing thus the possibility of setting the air gap size to a desired value for the purpose of switching off manufacturing tolerances. It is therefore also not possible to use this known stamping method to produce the air gap associated with any impedance with optimal use of the winding space. Even with the high effort of several different punching tools, only a rough gradation could be achieved. In addition, the punching out of the air gap required for each winding leads to an additional manufacturing effort which is not acceptable given the high labor costs. It would be possible to arrange air gap inserts between the ends of the outer legs of the E-shaped core sheet and the ends of the I-shaped yoke sheet. That requires. However, not only a more complex assembly arrangement for the cohesion of the E and I lamellae, but also as a result of the outer air gaps, a magnetic leakage flux also occurs, which can lead to disturbing humming noises.

Aus der OE-PS 294 270 ist auch ein Blechschnitt für einen Mantelkern bekannt, der aus E-förmigen Kernblechen und I-förmigen Rückschlußblechen gebildet wird, wobei die I-förmigen Rückschlußbleche zwischen die Schenkel der E-förmigen Kernbleche passend eingeschoben werden. Hier wird angestrebt, einen Mantelkern ohne Rücksicht auf die Lamellenform mittels Gehäusemantel und Boden derart zu umschließen, daß keine magnetische Streuung auftritt, und die Lamellen fest gegeneinander zu pressen.From OE-PS 294 270 a sheet metal cut for a jacket core is also known, which is formed from E-shaped core sheets and I-shaped backing sheets, the I-shaped backing sheets being inserted between the legs of the E-shaped core sheets. The aim here is to use a casing core regardless of the lamella shape by means of the casing casing and To enclose the floor in such a way that no magnetic scatter occurs, and to press the slats firmly against each other.

Der Erfindung liegt die Aufgabe zugrunde, das Herstellungsverfahren für die Lamellen derart zu gestalten, daß nicht nur das E-förmige Kernblech und das I-förmige Rückschlußblech abfallos oder abfallarm gestanzt werden, sondern die Lamellen im magnetischen Kreis derart angeordnet werden können, daß der Luftspalt nach Bedarf eingestellt werden kann.The invention has for its object to design the manufacturing process for the lamellae such that not only the E-shaped core plate and the I-shaped yoke plate are punched with little or no waste, but the lamellae can be arranged in the magnetic circuit in such a way that the air gap can be adjusted as required.

Diese Aufgabe wird gelöst, indem gemäß der Erfindung zwei Reihen E-förmiger Kernbleche mit den offenen Seiten gegenüber- und aneinanderliegend und derart versetzt zueinander ausgestanzt werden, daß die Enden der aneinanderliegenden Außenschenkel zweier benachbarter E-förmiger Kernbleche an dem Ende des Mittelschenkels des gegenüberliegenden, versetzten E-förmigen Kernbleches anliegen und aus den zwischen den Außenschenkeln und den Mittelschenkeln der gegenüberliegenden E-förmigen Kernbleche entstehenden freien Räumen die I-förmigen Rückschlußbleche ausgestanzt werden. Zur Bildung des magnetischen Kreises werden die I-förmigen Rückschlußbleche zwischen die Außenschenkel der E-förmigen Kernbleche passend eingeschoben. Am unteren und äußeren Teil der Außenschenkel der E-förmigen Kernbleche befinden sich Ausnehmungen, in die nach Beendigung der Paketierung der Lamellen in bekannter Weise eine Klemmschiene mit ihren umgebogenen Längsrändern eingreifen kann.This object is achieved in that, according to the invention, two rows of E-shaped core sheets are punched out with the open sides opposite and adjacent to one another and offset from one another such that the ends of the adjacent outer legs of two adjacent E-shaped core sheets are located at the end of the middle leg of the opposite Staggered E-shaped core sheets rest and the I-shaped yoke sheets are punched out of the free spaces created between the outer legs and the middle legs of the opposite E-shaped core sheets. To form the magnetic circuit, the I-shaped yoke plates are inserted between the outer legs of the E-shaped core plates. On the lower and outer part of the outer legs of the E-shaped core sheets there are recesses into which a clamping rail with its bent longitudinal edges can engage after the packaging of the slats has ended.

Dadurch, daß bei dem erfindungsgemäßen Stanzverfahren die Außenkanten der Außenschenkel gegeneinander anliegen, können die beiden Ausnehmungen an ihnen mit einem einzigen Stempel ausgestanzt werden, womit auch eine stabilere Auslegung dieses Werkzeugteiles erzielt wird. Weiterhin wird mit dem Stanzverfahren der Vorteil erzielt, daß durch eine entsprechende Ausbildung des Stempels außer den beiden Ausnehmungen zusätzlich noch eine Ausnehmung im Mittelschenkel des E-förmigen Kernbleches, die zur Aufnahme einer Luftspalteinlage dient, ausgestanzt werden kann.Characterized in that the outer edges of the outer legs lie against each other in the punching method according to the invention, the two recesses can be punched out on them with a single stamp, which also achieves a more stable design of this tool part. Furthermore, the advantage of the stamping process is that, in addition to the two recesses, a recess in the middle leg of the E-shaped core sheet, which serves to accommodate an air gap insert, can be punched out by a corresponding design of the stamp.

Zum Herstellen E-förmiger Kernbleche und zweier zwischen deren Schenkel eingelegter L-förmiger Rückschlußbleche ist auch schon ein Verfahren bekannt, bei dem zwei Reihen.:E-förmiger Kernbleche mit den offenen Seiten gegenüber-und aneinanderliegend ausgestanzt werden (DE-OS 2 638 780). Bei diesem Verfahren übergreifen die Enden der aneinanderliegenden Außenschenkel von zwei benachbarten E-förmigen Kernblechen sich gegenseitig,und der zwischen den Außenschenkeln über dem Mittelschenkel eines E-förmigen Kernblechs freibleibende Raum wird von den beiden zu einem Rechteck zusammengelegten L-förmigen Rückschlußblechen ausgefüllt. Diese bekannte Gestaltung des E-förmigen Kernbleches und der L-förmigen Rückschlußbleche hat den Nachteil, daß das Blechpaket aus drei Teilen besteht und daher keine ausreichende Festigkeit aufweist, da die L-förmigen mittleren Teile umkippbar sind.A method is also already known for producing E-shaped core sheets and two L-shaped yoke sheets inserted between their legs, in which two rows: E-shaped core sheets are punched out with the open sides opposite and adjacent to one another (DE-OS 2 638 780 ). In this method, the ends of the adjoining outer legs of two adjacent E-shaped core sheets overlap each other, and the space left between the outer legs over the middle leg of an E-shaped core sheet is filled by the two L-shaped backing sheets folded into a rectangle. This known design of the E-shaped core plate and the L-shaped yoke plates has the disadvantage that the laminated core consists of three parts and therefore does not have sufficient strength, since the L-shaped middle parts can be tipped over.

Das Stanzverfahren gemäß der Erfindung kann vorteilhaft derart gestaltet werden, daß das I-förmige Rückschlußblech länger gemacht wird als der freie Raum zwischen den Außenschenkeln des E-förmigen Kernbleches. Damit wird erreicht, daß das Paket der I-förmigen Rückschlußbleche unter Spannung zwischen die Außenschenkel eingeschoben werden kann. Das gleiche Ziel kann auch durch Ausstanzen der Enden des I-förmigen Rückschlußbleches mit einer Abschrägung erreicht werden, jedoch mit dem zusätzlichen Vorteil, daß die Einführung des I-Paketes zwischen die Außenschenkel des E-Paketes erleichtert wird.The punching method according to the invention can advantageously be designed such that the I-shaped back plate is made longer than the free space between the outer legs of the E-shaped core plate. This ensures that the package of I-shaped yoke plates can be inserted under tension between the outer legs. The same goal can also be achieved by punching out the ends of the I-shaped yoke plate with a bevel, but with the additional advantage that the introduction of the I-packet between the outer legs of the E-packet is facilitated.

In bestimmten Fällen kann es von Nutzen sein, den Raum für die Unterbringung der Wicklung zu vergrößern oder auch zu verkleinern. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Breite des I-förmigen Rückschlußbleches vergrößert oder verkleinert wird. Beim Ausstanzen wird damit eine größere oder kleinere Fensterhöhe zwischen den Außenschenkeln und dem Mittelschenkel des E-förmigen Kernbleches erreicht, ohne daß Abfall an Eisenmaterial entsteht. Das Stanzverfahren gemäß der Erfindung dient bevorzugt zum Herstellen einer flachen Bauform einer Drossel, wobei kein Abfall an Eisenmaterial auftritt. Es sind jedoch Fälle möglich, die eine höhere Bauform der Drossel erfordern, ohne die Breite zu verändern. Dies hat zur Folge, daß die Summe der Längen des Mittelschenkels und des Außenschenkels des E-förmigen Kernbleches bezogen auf den freien Raum zur Ausstanzung des I-förmigen Rückschlußbleches größer ist als die Länge des I-förmigen Rückschlußbleches, wodurch ein geringfügiger Abfall an Eisenmaterial entsteht.In certain cases, it may be useful to enlarge or reduce the space for accommodating the winding. This object is achieved in that the width of the I-shaped yoke plate is increased or decreased. When punching out, a larger or smaller window height between the outer legs and the middle leg of the E-shaped core sheet is achieved without waste iron material. The stamping method according to the invention is preferably used to produce a flat design of a choke, with no waste of iron material occurring. However, there are cases that require a higher design of the throttle without changing the width. This has the consequence that the sum of the lengths of the middle leg and the outer leg of the E-shaped core sheet with respect to the free Space for punching out the I-shaped backing plate is greater than the length of the I-shaped backing plate, which results in a slight drop in iron material.

Ein wesentlicher Vorteil des Stanzverfahrens gemäß der Erfindung besteht auch darin, daß bei Bedarf eines Luftspaltes zwischen dem Mittelschenkel des E-förmigen Kernbleches und dem I-förmigen Rückschlußblech als Folge der Kürzung des Mittelschenkels sich der Außenschenkel um den Betrag des Luftspaltes verlängert, wodurch ohne zusätzliches Eisenmaterial ein vergrößerter Wickelraum gebildet wird.A major advantage of the punching method according to the invention is that when an air gap is required between the center leg of the E-shaped core plate and the I-shaped back plate as a result of the shortening of the center leg, the outer leg is lengthened by the amount of the air gap, which means that there is no additional Iron material an enlarged changing room is formed.

Weitere Vorteile und Einzelheiten der Erfindung ergeben sich aus der folgenden Beschreibung einiger Ausführungsbeispiele. Es zeigen:

  • Figur 1 eine Drossel mit nach dem Verfahren gemäß der Erfindung hergestellten Kern- und Rückschlußblechen in einem schematischen Schnitt, Figur 2 die An- , ordnung der E-Kernbleche und der I-Rückschlußbleche dieser Drossel bei dem abfallosen Stanzverfahren gemäß der Erfindung, Figur 3 ein mit dem erfindungsgemäßen Verfahren hergestelltes E-förmiges Kernblech und ein I-förmiges Rückschlußblech mit abgeschrägten Enden und Figur 4 die Anordnung der E-Kernbleche und der I-Rückschlußbleche bei dem abfallarmen Stanzverfahren gemäß der Erfindung. Die in Figur 1 dargestellte Drossel weist einen Eisenkern auf, der aus E-förmigen Kernblechen 1 und I-förmigen Rückschlußblechen 2 besteht. Die Mittelschenkel 3 der E-förmigen Kernbleche 1 sind von einer Spule 4 umfaßt, die nach dem Wickeln auf das Paket der E-Kernbleche 1 aufgeschoben ist. Zwischen dem I-förmigen Rückschlußblech 2 und dem Mittelschenkel 3 des E-förmigen Kernbleches 1 ist eine deformierbare Luftspalteinlage 4a angeordnet, die in eine Nut 5 hineinragt, die sich im Mittelschenkel 3 befindet. Mittels dieser Nut 5 ist verhindert, daß die Luftspalteinlage 4a bei der Montage außer Mitte gelangt, so daß zusätzliche Wirbelstromverluste nicht zustandekommen können. Nachdem das Paket der I-förmigen Rückschlußbleche 2 zwischen die Außenschenkel 6 des Paketes der E-förmigen Kernbleche 1 passend eingeschoben ist, wird anschließend eine Klemmschiene 7 aufgesetzt, die mit nach oben und innen umgebogenen Längsrändern 8 um die Enden der Außenschenkel 6 herumgreift und sich mit ihren Längsrändern 8 in Ausnehmungen 9 an den Außenschenkeln 6 hineinsetzt.
  • Figur 2 läßt erkennen, wie die E-förmigen Kernbleche 1 und die I-förmigen Rückschlußbleche 2 für die Drossel nach Figur 1 abfalllos aus einem Blechstreifen gewonnen werden. Zur Erzielung des abfallosen Stanzens sind die E-förmigen Kernbleche 1 gegeneinander und auch derart versetzt angeordnet, daß je ein Ende 10 der Außenschenkel 6 zweier E-förmiger Kernbleche 1 am Ende des Mittelschenkels 3 des gegeneinander gekehrten E-förmigen Kernbleches 1 anliegt. Bei dieser versetzten Anordnung der gegeneinander weisenden E-förmigen Kernbleche 1 fallen durch Ausstanzen der zwischen den Außenschenkeln 6 und den Mittelschenkel 3 befindlichen Räume jeweils zwei I-förmige Rückschlußbleche 2 an. Weiterhin ist in Figur 2 dargestellt, daß die Ausnehmungen 9 an den Außenschenkeln 6 und die Nut 5 im Mittelschenkel 3, die zur Aufnahme einer Luftspalteinlage 4a dient, als Folge der versetzten Anordnung der E-förmigen Kernbleche 1 nur mit einem einzigen Stempel ausstanzbar sind.
  • Gemäß Figur 3 weisen zum erleichterten Einführen und vergrößerten Verpressen der I-Pakete zwischen den Außenschenkeln 6 des E-Paketes die Enden der I-förmigen Rückschlußbleche 2 eine Abschrägung 11 auf, die naturgemäß als Abschrägung 12 an dem E-förmigen Kernblech 1 wiederkehrt, ohne hier jedoch praktisch von Bedeutung zu sein.
  • Figur 4 zeigt die Anordnung des E-förmigen Kernbleches 1 und der I-förmigen Rückschlußbleche 2 beim abfallarmenStanzverfahren. Die Summe der Längen aus dem Mittelschenkel 3 und dem Außenschenkel 6 des E-förmigen Kernbleches 1 bezogen auf den freien Raum zum Ausstanzen des I-förmigen Rückschlußbleches ist größer als die Länge des I-förmigen Rückschlußbleches, wodurch der Abfall A an Eisenmaterial zustandekommt.
Further advantages and details of the invention emerge from the following description of some exemplary embodiments. Show it:
  • 1 shows a throttle with core and yoke plates produced by the method according to the invention in a schematic section, FIG. 2 shows the arrangement of the E-core plates and the I-yoke plates of this throttle in the waste-free stamping method according to the invention, FIG. 3 E-shaped core sheet produced by the method according to the invention and an I-shaped return sheet with bevelled ends and FIG. 4 shows the arrangement of the E-core sheets and the I-return sheet in the low-waste stamping process according to the invention. The throttle shown in Figure 1 has an iron core, which consists of E-shaped core sheets 1 and I-shaped yoke plates 2. The middle leg 3 of the E-shaped core sheets 1 are encompassed by a coil 4 which is pushed onto the package of the E core sheets 1 after winding. A deformable air gap insert 4a is arranged between the I-shaped yoke plate 2 and the middle leg 3 of the E-shaped core plate 1, which protrudes into a groove 5 which is located in the middle leg 3. By means of this groove 5 it is prevented that the air gap insert 4a gets out of the middle during assembly, so that additional eddy current losses cannot occur. After the package of I-shaped yoke plates 2 is inserted between the outer legs 6 of the package of E-shaped core sheets 1, a clamping rail 7 is then placed, which grips around the ends of the outer legs 6 with upward and inward bent longitudinal edges 8 and is with their longitudinal edges 8 in recesses 9 on the outer legs 6.
  • FIG. 2 shows how the E-shaped core sheets 1 and the I-shaped backing sheets 2 for the choke according to FIG. 1 are obtained without waste from a sheet metal strip. To achieve the waste-free punching, the E-shaped core sheets 1 are arranged against each other and also offset such that each one end 10 of the outer legs 6 of two E-shaped core sheets 1 rests against the end of the middle leg 3 of the mutually facing E-shaped core sheet 1. In this offset arrangement of the mutually facing E-shaped core sheets 1, two I-shaped yoke sheets 2 are obtained by punching out the spaces located between the outer legs 6 and the middle leg 3. It is also shown in Figure 2 that the recesses 9 on the outer legs 6 and the groove 5 in the middle leg 3, which serves to receive an air gap insert 4a, can only be punched out with a single punch as a result of the offset arrangement of the E-shaped core sheets 1.
  • According to FIG. 3, the ends of the I-shaped yoke plates 2 have a chamfer 11, which naturally recurs as a chamfer 12 on the E-shaped core plate 1, for easier insertion and enlarged pressing of the I-packets between the outer legs 6 of the E-packet to be of practical importance here, however.
  • Figure 4 shows the arrangement of the E-shaped core sheet 1 and the I-shaped backing sheets 2 in the low-waste stamping process. The sum of the lengths from the middle leg 3 and the outer leg 6 of the E-shaped core sheet 1 based on the free space for punching out the I-shaped yoke sheet is greater than the length of the I-shaped backing sheet, whereby the waste A of iron material occurs.

Claims (8)

1. Verfahren zum Herstellen E-förmiger Kernbleche und zwischen deren Außenschenkel passender I-förmiger Rückschlußbleche einer Drossel oder eines Transformators insbesondere für die Verwendung als Vorschaltgerät für Gasentladungslampen, dadurch gekennzeichnet, daß zwei Reihen E-förmiger Kernbleche (1) mit den offenen Seiten gegenüber- und aneinanderliegend und derart versetzt zueinander ausgestanzt werden, daß die Enden (10) der aneinanderliegenden Außenschenkel (6) zweier benachbarter E-förmiger Kernbleche (1) an dem Ende des Mittelschenkels (3) des gegenüberliegenden, versetzten E-förmigen Kernblechs anliegen und aus den zwischen den Außenschenkeln (6) und den Mittelschenkeln (3) der gegenüberliegenden E-förmigen Kernbleche (1) entstehenden freien Räumen die I-förmigen Rückschlußbleche (2) ausgestanzt werden.1. A method for producing E-shaped core sheets and between their outer legs matching I-shaped yoke plates of a choke or a transformer, in particular for use as a ballast for gas discharge lamps, characterized in that two rows of E-shaped core sheets (1) with the open sides opposite - And are punched out next to each other and offset in such a way that the ends (10) of the adjacent outer legs (6) of two adjacent E-shaped core sheets (1) lie against the end of the middle leg (3) of the opposite, offset E-shaped core sheet and from the I-shaped yoke plates (2) are punched out between the outer legs (6) and the middle legs (3) of the opposite E-shaped core sheets (1). 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das I-förmige Rückschluß- , blech (2) beim Ausstanzen länger bemessen wird, als das Innenmaß zwischen den Außenschenkeln (6) des E-förmigen Kernblechs (1) ausmacht.2. The method according to claim 1, characterized in that the I-shaped yoke, sheet (2) is dimensioned longer when punching out than the inside dimension between the outer legs (6) of the E-shaped core sheet (1). 3. Verfahren nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Enden des I-förmigen Rückschlußblechs (2) mit einer Abschrägung (11) ausgestanzt werden.3. The method according to claim 1 and 2, characterized in that the ends of the I-shaped yoke plate (2) are punched out with a bevel (11). 4. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß Ausnehmungen (9) an den Außenschenkeln (6) der E-förmigen Kernbleche (1) für die Umklammerung mittels einer Klemmschiene (7) mit einem einzigen Stempel ausgestanzt werden.4. The method according to claim 1 to 3, characterized in that recesses (9) on the outer legs (6) of the E-shaped core sheets (1) for clasping by means of a clamping rail (7) are punched out with a single stamp. 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Nut (5) im Mittelschenkel (3) des E-förmigen Kernbleches (1) zur Aufnahme einer Luftspalteinlage (4a) zusammen mit den Ausnehmungen (9) für die Klemmschiene (7) mit einem einzigen Stempel ausgestanzt wird.5. The method according to claim 4, characterized in that the groove (5) in the middle leg (3) of the E-shaped core sheet (1) for receiving an air gap insert (4a) together with the recesses (9) for the clamping rail (7) a single stamp is punched out. 6. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß das I-förmige Rückschlußblech (2) zur Anpassung an den erforderlichen Wickelraum jeweils mit einer entsprechenden Breite ausgestanzt wird.6. The method according to claim 1 to 3, characterized in that the I-shaped yoke plate (2) is punched out with a corresponding width to adapt to the required winding space. 7. Verfahren nach Anspruch 1 bis 3 und 6, dadurch gekennzeichnet, daß bei Bedarf eines Luftspaltes im magnetischen Kreis die Länge des Mittelschenkels (3) des E-förmigen Kernbleches (1) um die Größe des Luftspaltes kürzer und die Außenschenkel (6) um die Größe des Luftspaltes länger ausgestanzt werden.7. The method according to claim 1 to 3 and 6, characterized in that if necessary, an air gap in the magnetic circuit, the length of the middle leg (3) of the E-shaped core sheet (1) by the size of the air gap shorter and the outer legs (6) the size of the air gap are punched out longer. 8. Verfahren nach Anspruch 1 bis 3, 6 und 7, dadurch gekennzeichnet, daß die Summe der Längen des Mittelschenkels (3) und des Außenschenkels (6) des E-förmigen Kernbleches (1) bezogen auf den freien Raum zum Ausstanzen des I-förmigen Rückschlußbleches (2) größer ist als die Länge des letzteren.8. The method according to claim 1 to 3, 6 and 7, characterized in that the sum of the lengths of the middle leg (3) and the outer leg (6) of the E-shaped core sheet (1) based on the free space for punching out the I- shaped return plate (2) is greater than the length of the latter.
EP80104497A 1979-08-21 1980-07-30 Process for making e-shaped core laminations and i-shaped yoke laminations for a choke or transformer, particularly for gas discharge lamps Expired EP0024319B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104497T ATE3480T1 (en) 1979-08-21 1980-07-30 PROCESS FOR MANUFACTURING E-SHAPED CORE LAINS AND I-SHAPED RETURN PLATES OF A CHOCK OR TRANSFORMER, ESPECIALLY FOR GAS DISCHARGE LAMPS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2933781 1979-08-21
DE2933781A DE2933781C2 (en) 1979-08-21 1979-08-21 Process for the production of E-shaped core sheets and I-shaped return yoke sheets for a choke or a transformer, in particular for gas discharge lamps

Publications (2)

Publication Number Publication Date
EP0024319A1 true EP0024319A1 (en) 1981-03-04
EP0024319B1 EP0024319B1 (en) 1983-05-18

Family

ID=6078926

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104497A Expired EP0024319B1 (en) 1979-08-21 1980-07-30 Process for making e-shaped core laminations and i-shaped yoke laminations for a choke or transformer, particularly for gas discharge lamps

Country Status (21)

Country Link
EP (1) EP0024319B1 (en)
JP (1) JPS5633809A (en)
AR (1) AR222402A1 (en)
AT (1) ATE3480T1 (en)
AU (1) AU540139B2 (en)
BR (1) BR8005257A (en)
CS (1) CS236771B2 (en)
DD (1) DD153016A5 (en)
DE (1) DE2933781C2 (en)
EG (1) EG13908A (en)
ES (1) ES8103877A1 (en)
FI (1) FI71210C (en)
GR (1) GR69693B (en)
HU (1) HU179890B (en)
IN (1) IN152290B (en)
PL (1) PL125117B1 (en)
RO (1) RO83440B (en)
SU (1) SU1083926A3 (en)
UA (1) UA7590A1 (en)
YU (1) YU39881B (en)
ZA (1) ZA805082B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175662A1 (en) * 1984-08-24 1986-03-26 Kanthal AB Method of manufacturing loop-formed metal foil elements
EP0571242A1 (en) * 1992-05-21 1993-11-24 Acec Ballasts Magnetic circuit with airgap, particularly for ballasts for discharge lamps and its manufacturing method
WO1994006131A1 (en) * 1992-08-28 1994-03-17 Tridonic Bauelemente Gmbh Adjustable-impedance choke coil

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032419A (en) * 1983-08-01 1985-02-19 Nec Corp Power amplifier
DE3402036C1 (en) * 1984-01-21 1985-07-11 Schwabe GmbH & Co KG Elektrotechnische Fabrik, 7067 Urbach Method for producing E-shaped core laminates and I-shaped magnetic return path laminates of an inductor or of a transformer, especially for gas-discharge lamps
DE19645098C2 (en) * 1996-11-01 2000-09-21 Vossloh Schwabe Gmbh Choke and process for its manufacture
ES2155806B1 (en) * 1999-10-07 2001-10-16 Ventura Ind PROCEDURE FOR DRILLING CONSTITUTIVE LAYERS OF MAGNETIC NUCLEES IN THE FORM OF "E" AND "T".
DE102004012436B4 (en) * 2004-03-12 2006-04-20 Vossloh-Schwabe Deutschland Gmbh Core sheet for inductive component
JP4961163B2 (en) * 2006-05-08 2012-06-27 ラピスセミコンダクタ株式会社 DC coupled amplifier circuit
DE102008004555B4 (en) * 2008-01-15 2010-07-29 Vossloh-Schwabe Deutschland Gmbh Core sheet set for inductive components
DE102011116861A1 (en) * 2011-10-25 2013-04-25 Epcos Ag Electronic component for guiding a magnetic field

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US2235425A (en) * 1938-12-09 1941-03-18 Western Electric Co Electromagnetic core
GB671823A (en) * 1948-02-06 1952-05-14 British Thomson Houston Co Ltd Improvements in and relating to punched magnetic core laminations for electric induction apparatus such as transformers
DE1438657A1 (en) * 1962-12-07 1969-01-16 Waasner B Core sheet for transformers
DE1946885A1 (en) * 1968-09-24 1970-04-02 Elektrokovina Tovarna Elektrok Choke coil or transformer
DE1638944A1 (en) * 1967-02-09 1970-05-14 Waasner B Core sheet with two sheet metal parts
DE1613628A1 (en) * 1967-03-20 1970-07-30 Blum Eisen & Metallind Two-part iron core, especially for transformers
DE2139010A1 (en) * 1971-08-04 1973-03-08 Kammeyer Karl DIVIDED SHEET METAL SECTION FOR TRANSFORMERS
DE2638780A1 (en) * 1975-09-03 1977-03-17 Leuenberger H Shell-type magnetic core for transformer or induction coil - is built entirely of L-shaped laminations
DE2722394A1 (en) * 1976-06-10 1977-12-22 Hiradastechnikai Anyagok Gyara Magnetic material laminations for transformers - have T and E shapes with protrusions and slots for assembly into stacks
DE2711855A1 (en) * 1977-03-18 1978-09-21 Erich Grau Transformer core sheet metal shell construction - has transverse yoke partitioned by joint between outer limbs of three-limb design

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AT294270B (en) * 1969-07-14 1971-11-10 Berndeisel & Co Johann Chokes for discharge lamps, in particular fluorescent lamps
DE7005834U (en) * 1970-02-19 1970-05-21 Bbc Brown Boveri & Cie CORE PLATE FOR REACTORS OR TRANSFORMERS.
DE2309727C3 (en) * 1973-02-27 1979-05-03 Fa. Hermann Schwabe, 7067 Urbach Process for the production of chokes or transformers to be used in particular as ballasts for gas discharge lamps
DE2652171A1 (en) * 1976-11-16 1978-05-24 Bertos Ag CONTROL UNIT ETC. WITH E- AND I-SHAPED CORE PLATES

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Publication number Priority date Publication date Assignee Title
DE219466C (en) *
DE159059C (en) *
US2235425A (en) * 1938-12-09 1941-03-18 Western Electric Co Electromagnetic core
GB671823A (en) * 1948-02-06 1952-05-14 British Thomson Houston Co Ltd Improvements in and relating to punched magnetic core laminations for electric induction apparatus such as transformers
DE1438657A1 (en) * 1962-12-07 1969-01-16 Waasner B Core sheet for transformers
DE1638944A1 (en) * 1967-02-09 1970-05-14 Waasner B Core sheet with two sheet metal parts
DE1613628A1 (en) * 1967-03-20 1970-07-30 Blum Eisen & Metallind Two-part iron core, especially for transformers
DE1946885A1 (en) * 1968-09-24 1970-04-02 Elektrokovina Tovarna Elektrok Choke coil or transformer
DE2139010A1 (en) * 1971-08-04 1973-03-08 Kammeyer Karl DIVIDED SHEET METAL SECTION FOR TRANSFORMERS
DE2638780A1 (en) * 1975-09-03 1977-03-17 Leuenberger H Shell-type magnetic core for transformer or induction coil - is built entirely of L-shaped laminations
DE2722394A1 (en) * 1976-06-10 1977-12-22 Hiradastechnikai Anyagok Gyara Magnetic material laminations for transformers - have T and E shapes with protrusions and slots for assembly into stacks
DE2711855A1 (en) * 1977-03-18 1978-09-21 Erich Grau Transformer core sheet metal shell construction - has transverse yoke partitioned by joint between outer limbs of three-limb design

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175662A1 (en) * 1984-08-24 1986-03-26 Kanthal AB Method of manufacturing loop-formed metal foil elements
EP0571242A1 (en) * 1992-05-21 1993-11-24 Acec Ballasts Magnetic circuit with airgap, particularly for ballasts for discharge lamps and its manufacturing method
WO1994006131A1 (en) * 1992-08-28 1994-03-17 Tridonic Bauelemente Gmbh Adjustable-impedance choke coil

Also Published As

Publication number Publication date
ES494405A0 (en) 1981-03-16
PL226317A1 (en) 1981-06-19
RO83440B (en) 1984-02-28
ZA805082B (en) 1981-09-30
BR8005257A (en) 1981-03-04
YU39881B (en) 1985-04-30
EG13908A (en) 1982-12-31
FI71210B (en) 1986-08-14
CS236771B2 (en) 1985-05-15
SU1083926A3 (en) 1984-03-30
DE2933781C2 (en) 1982-10-07
AU540139B2 (en) 1984-11-01
GR69693B (en) 1982-07-08
ES8103877A1 (en) 1981-03-16
YU209280A (en) 1983-06-30
AR222402A1 (en) 1981-05-15
AU6161380A (en) 1981-04-09
ATE3480T1 (en) 1983-06-15
HU179890B (en) 1982-12-28
UA7590A1 (en) 1995-09-29
JPS5633809A (en) 1981-04-04
RO83440A (en) 1984-02-21
PL125117B1 (en) 1983-03-31
EP0024319B1 (en) 1983-05-18
FI71210C (en) 1986-11-24
DD153016A5 (en) 1981-12-16
DE2933781A1 (en) 1981-03-26
IN152290B (en) 1983-12-17
FI802648A (en) 1981-02-22

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