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EP0843881B1 - Procede et dispositif d'empilage de toles, notamment pour produire des noyaux de transformateurs - Google Patents

Procede et dispositif d'empilage de toles, notamment pour produire des noyaux de transformateurs Download PDF

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Publication number
EP0843881B1
EP0843881B1 EP95929089A EP95929089A EP0843881B1 EP 0843881 B1 EP0843881 B1 EP 0843881B1 EP 95929089 A EP95929089 A EP 95929089A EP 95929089 A EP95929089 A EP 95929089A EP 0843881 B1 EP0843881 B1 EP 0843881B1
Authority
EP
European Patent Office
Prior art keywords
individual
plate
adhesive
positioning
stacking table
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
Application number
EP95929089A
Other languages
German (de)
English (en)
Other versions
EP0843881A1 (fr
Inventor
Benedetto Giorgio Finzi
Giacomo Bosso
Angelo Demaria
Bruno Zumstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lagor Srl
Original Assignee
Lagor Srl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lagor Srl filed Critical Lagor Srl
Priority to AT95929089T priority Critical patent/ATE181454T1/de
Publication of EP0843881A1 publication Critical patent/EP0843881A1/fr
Application granted granted Critical
Publication of EP0843881B1 publication Critical patent/EP0843881B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a method for layering laminated cores, especially for the production of transformer cores according to the preamble of claim 1, and one Device for layering such laminated cores according to the Preamble of claim 8.
  • a method has become known from DE-A-3535 573 in the transformer cores in one device continuously getting produced.
  • the core sheet material is used fed continuously from a roll and with the help of a punching tool punched out.
  • the material thickness is before the cutting process electronically determined by a measuring device.
  • the punching tool a metering device for adhesive is also assigned.
  • the cores are glued continuously and simultaneously Eject through the cutting plate into one Work magazine. When the required core strength is reached the glue supply is interrupted once so that the Production of a new core begins. This method is not suitable for the production of large areas and complicated cores with several individual parts.
  • EP-A-10 654 describes a Process for gluing laminated core in transformer construction, where the laminated cores only after layering poured over a casting resin. However, this penetrates the micro-fine spaces between the individual sheets one and the sheets are glued together in this way.
  • gluing the Single sheets within a sheet stack have several advantages causes. Regardless of whether the actual layering process can be done manually or automatically, the finished Sheet pack at the end of the shift process without any special precautions be transported and stored. There is not the risk of a previously built up offset between individual layers or between individual layers again shifts.
  • the bending stability of a laminated core is significantly improved by the bonding, which is particularly advantageous in the case of long laminated cores.
  • the adhesive layer between the individual sheets leads to a transformer core on the one hand to an improvement of the electrical properties because the glue acts as an insulator works and on the other hand to a reduction of the transformer noise, because the individual sheets cannot swing.
  • a single sheet is always stored in the correct position and held down in the dropped position. Subsequently the adhesive is applied to the surface of the deposited single sheet applied and another single sheet on the with Adhesive-coated surface deposited. The process will repeated until the laminated core is set up. The Holding down on the one hand causes the last one to be dropped Sheet is pressed against the previous sheet and that the adhesive in between is distributed correctly. On the other hand, it also prevents the Apply the new layer of adhesive to the deposited sheet can move.
  • the adhesive can be relatively easy to check for quantity and placement.
  • the adhesive is advantageously punctiform or applied in a linear manner to at least one side surface, that when placed on top of each other a full-surface distribution of the adhesive. Distributed by capillary action the adhesive spreads over the entire surface of a Single sheet without exiting at the front and without leaving any unglued areas.
  • the amount and the arrangement of the dosage can be empirical or calculated be determined.
  • Upstream of the positioning table relieves the burden the gluing process from the need for simultaneous Positioning. Only on the stacking table glued, the relative position of each individual sheet already on the positioning table has been set. So can also be relative complicated sequences with different staggered Individual sheets can be glued quickly. To be a homogeneous To ensure bonding, it is advantageous if that assembled laminated core after the gluing process during a predetermined rest time is pressed together. Depending on the Properties of the adhesive used must have this rest period longer or shorter.
  • an adhesive that is already at Room temperature cures.
  • the sheet pack has without further operations at the end of the rest period its final Stability.
  • an adhesive can also be used be used that does not harden at room temperature, the curing only after the assembly of the laminated core or at a later time in an oven. To readjustments may be necessary for curing the relative position between the individual sheets is still conceivable.
  • the invention also relates to a device for layering of sheet metal packages, which is a simple implementation of the described method allows.
  • This device is characterized by the features in claim 8.
  • the adhesive dosing device guarantees a constant Apply the adhesive without the layering process is affected.
  • a lowerable hold-down device can be arranged, the can be pressed against the individual sheet lying on top.
  • a postioning table next to the stacking table arranged, with positioning for a correct position Positioning of each sheet is provided.
  • a cross transport arranged that a detection of a single sheet the positioning table and placing it on the stacking table enables.
  • Suitable positioning means are known to the person skilled in the art already known. It can be a threading bolt which engages in an opening in the individual sheets.
  • pushing devices are also conceivable which are connected to the Outside edges of a single sheet are pushed and the latter slide into the correct relative position.
  • suction pads or magnetic grippers are possible.
  • FIG. 1 shows a better understanding of the invention and 2 a multi-stage core 1 known per se for one Three-phase transformer.
  • This consists of one yoke 2 each and 2 ', from one outer leg 3 and 3' and one Middle leg 4.
  • In cross section can be symmetrical Arrangement of two first stages 5 and 5 ', two second stages 6 and 6 'and a third stage 7 can be distinguished.
  • Of course can also be more complicated or simpler Laminates are built up.
  • Figures 3 and 3a show a laminated core 8, which is for example around the step of a leg or a yoke could act according to Figures 1 and 2.
  • the sheet pack has the entire layer thickness S and is composed of individual sheets 9, which are stacked into individual layers 10.
  • Each layer consists of a layer 11 finished assembled transformer core electrical Avoiding losses at the joints is one thing
  • Position offset 12 between the layers 10 and on the other Layer offset 13 between the layers 11 is provided.
  • There is an adhesive layer 14 between each of the individual sheets 9 if possible arranged over the entire surface.
  • FIGS 4 and 5 show one largely automated workstation for performing the inventive method.
  • the workstation consists of essentially from a positioning table 18 on the positioning means 20, for example in the form of push-on elements are arranged.
  • Parallel to the positioning table stands a stacking table 19, which is designed as a lifting table is and in the direction of arrow f relative to the contact surface of the Positioning table can be moved.
  • the stacking table has a support bar 27 arranged as a comb surface.
  • the individual sheets 9 are fed to the work station a longitudinal conveyor 15, which is, for example can be a conveyor belt.
  • a first means of cross transport 16, which is displaceable in the direction of arrow d, is concerned the transport from the longitudinal transport means 15 to the positioning table 18.
  • the individual sheets transported from the positioning table 18 to the stacking table 19 become.
  • a hold-down device 21 and at least one Dispensing device 22 arranged for the adhesive are of this type that it moves from a rest position into a Operating position can be brought.
  • Dosing devices, in particular microdosing pumps for the metered application of Adhesives are already from other technical experts Known areas.
  • a stacking trolley 24 is provided, which is also comb-like Support bar 28 has. These are dimensioned so that they retracted between the support beams 27 of the stacking table can be.
  • Supplementary aids are clamping plates 25 and 25 ' provided between which a fully glued laminated core can be pressed together.
  • the pressing force is included With the help of tie rods 26 applied.
  • a single sheet comes from the cross-cutting system 9 in the direction of arrow a on the longitudinal transport means 15 parallel in front of the positioning table 18.
  • the first means of cross transport 16 transports the single sheet in the direction of the arrow b on the positioning table.
  • the positioning means activated so that a precise alignment of the single sheet with respect to the central axis and longitudinal position. It can any offset can be made in the longitudinal direction.
  • the single sheet that is precisely aligned in this way is replaced by the second Transverse means 17 in the direction of arrow c on the stacking table 19 or transported to a stack already there.
  • the vacuum suction cups 23 hold the single sheet is parallel to the base.
  • the hold-down device and the dosing device remain in one Rest position in which the feeding of the single sheet is not hindered becomes.
  • the hold-down device can be lowered at the same time or after lowering the sheet onto the stack take place (Figure 6b).
  • the vacuum suction device 23 of the second transverse transport means can now be raised and already back to the positioning table 18 for receiving a new one Sheet metal can be returned.
  • the hold-down device 21 presses the single sheet just placed against the stack and at the same time, the metering device 22 becomes punctiform an adhesive applied. Also a line job would be conceivable. After all, the glue could also be out Spray nozzles are sprayed (Figure 6c).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Claims (11)

  1. Procédé d'empilage de tôles (8), notamment pour produire des noyaux de transformateurs, selon lequel plusieurs tôles individuelles (9) sont empilées pour former au moins une tôle compacte (8) et sont collées ensemble, partiellement ou sur toute leur surface, au niveau des surfaces latérales tournées les unes vers les autres, étant précisé qu'à chaque fois, une tôle individuelle (9) est déposée dans la bonne position et est maintenue abaissée dans la position dans laquelle elle a été déposée, qu'une colle liquide ou pâteuse est ensuite appliquée à un ou plusieurs endroits sur la surface de la tôle individuelle déposée et qu'une autre tôle individuelle est déposée sur la surface enduite de colle, et enfin que l'opération est répétée jusqu'à ce que la tôle (8) soit formée, caractérisé en ce que le dépôt des tôles individuelles à la bonne place et leur collage ont lieu sur une table d'empilage (19), et en ce que la position relative de chaque tôle individuelle qui correspond à sa position dans l'empilage est déterminée sur une table de positionnement (18) montée en amont de la table d'empilage.
  2. Procédé selon la revendication 1, caractérisé en ce que les tôles individuelles sont amenées sur un moyen de transport longitudinal (15) et sont transférées sur la table de positionnement (18) grâce à un premier moyen de transport transversal (16), en ce que les tôles individuelles positionnées passent de la table de positionnement à la table d'empilage grâce à un second moyen de transport transversal (17), et en ce que la tôle finie est transférée sur un autre moyen de transport (24) pour être évacuée.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, après les opérations de positionnement et de collage, la tôle formée est comprimée pendant un temps de repos prédéfini.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'on utilise une colle qui durcit à température ambiante.
  5. Procédé selon l'une des revendications 1 à 3, caractérisé en ce qu'on utilise une colle qui ne durcit pas à température ambiante, et en ce que le durcissement a lieu dans un four après la formation de la tôle ou ultérieurement.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce qu'on ménage une zone sans colle, aux extrémités des tôles individuelles, de telle sorte que les extrémités superposées soient relativement flexibles les unes par rapport aux autres.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que des empilages de tôles individuels sont formés pour des gradins ou pour des couches entiers ou partiels, et en ce que les empilages individuels sont assemblés en un noyau fini sans collage mutuel.
  8. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, notamment pour produire des noyaux de transformateurs, comportant une table d'empilage (19) sur laquelle plusieurs tôles individuelles (9) peuvent être empilées pour former au moins une tôle compacte (8), caractérisé en ce qu'il est prévu, au-dessus de la table d'empilage (19), un dispositif doseur de colle (22) qui est mobile entre une position de repos permettant le dépôt d'une tôle individuelle et une position de marche dans laquelle de la colle peut être appliquée sur la surface d'une tôle individuelle déposée.
  9. Dispositif selon la revendication 8, caractérisé en ce qu'il est prévu, au-dessus de la table d'empilage (19), un dispositif presse-tôle (21) apte à être abaissé, qui peut être pressé contre la tôle individuelle qui se trouve sur le dessus.
  10. Dispositif selon la revendication 8 ou 9, caractérisé en ce qu'il est prévu, près de la table d'empilage (19), une table de positionnement (18) qui est pourvue de moyens de positionnement (20) destinés à placer chaque tôle individuelle (9) à la bonne place, et en ce qu'il est prévu, entre la table de positionnement (18) et la table d'empilage (19), un moyen de transport transversal (17) pour prendre une tôle individuelle sur la table de positionnement et pour la déposer sur la table d'empilage.
  11. Dispositif selon la revendication 10, caractérisé en ce que la table d'empilage (19) est conçue comme une table élévatrice qui peut être abaissée par rapport au plan d'appui de la table de positionnement.
EP95929089A 1995-08-07 1995-08-07 Procede et dispositif d'empilage de toles, notamment pour produire des noyaux de transformateurs Expired - Lifetime EP0843881B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT95929089T ATE181454T1 (de) 1995-08-07 1995-08-07 Verfahren und vorrichtung zum schichten von blechpaketen, insbesondere für die herstellung von transformatoren-kernen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1995/003129 WO1997006539A1 (fr) 1995-08-07 1995-08-07 Procede et dispositif d'empilage de toles, notamment pour produire des noyaux de transformateurs

Publications (2)

Publication Number Publication Date
EP0843881A1 EP0843881A1 (fr) 1998-05-27
EP0843881B1 true EP0843881B1 (fr) 1999-06-16

Family

ID=8166074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95929089A Expired - Lifetime EP0843881B1 (fr) 1995-08-07 1995-08-07 Procede et dispositif d'empilage de toles, notamment pour produire des noyaux de transformateurs

Country Status (6)

Country Link
EP (1) EP0843881B1 (fr)
DE (1) DE59506253D1 (fr)
DK (1) DK0843881T3 (fr)
ES (1) ES2135080T3 (fr)
GR (1) GR3031062T3 (fr)
WO (1) WO1997006539A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1764808A1 (fr) 2005-09-15 2007-03-21 Siemens Aktiengesellschaft Méthode et disposiitif pour fabriquer un paquet du tôles

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1578008A1 (fr) * 2004-03-08 2005-09-21 Siemens Aktiengesellschaft Procédé de fabrication d'un paquet de tôles pour une machine dynamo-électrique
JP6543608B2 (ja) * 2016-12-22 2019-07-10 株式会社三井ハイテック 積層鉄心の製造方法及び積層鉄心の製造装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE694510A (fr) * 1966-03-16 1967-07-31
CH465054A (de) * 1968-05-31 1968-11-15 Oerlikon Maschf Einrichtung zum Stapeln von Einzelblechen zu einem Blechpaket und Verfahren zum Betrieb der Einrichtung
DE2847988A1 (de) * 1978-11-04 1980-05-14 Bbc Brown Boveri & Cie Verfahren zum verkleben von blechpaketen im elektromaschinen- und transformatorenbau
IT1198971B (it) * 1984-11-30 1988-12-21 Elena In Legnaioli Giuli Impianto per il montaggio di nuclei magnetici per trasformatori elettrici ed altro
DE3535573A1 (de) * 1985-10-03 1987-04-09 Heliowatt Werke Verfahren zur herstellung lamellierter kerne aus gestanzten blechen
DE9011811U1 (de) * 1990-08-14 1991-12-12 Siemens AG, 8000 München Auflegetisch für einen Tranformatorkern

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1764808A1 (fr) 2005-09-15 2007-03-21 Siemens Aktiengesellschaft Méthode et disposiitif pour fabriquer un paquet du tôles

Also Published As

Publication number Publication date
EP0843881A1 (fr) 1998-05-27
ES2135080T3 (es) 1999-10-16
WO1997006539A1 (fr) 1997-02-20
DE59506253D1 (de) 1999-07-22
DK0843881T3 (da) 2000-01-17
GR3031062T3 (en) 1999-12-31

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