EP0843881A1 - 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

Info

Publication number
EP0843881A1
EP0843881A1 EP95929089A EP95929089A EP0843881A1 EP 0843881 A1 EP0843881 A1 EP 0843881A1 EP 95929089 A EP95929089 A EP 95929089A EP 95929089 A EP95929089 A EP 95929089A EP 0843881 A1 EP0843881 A1 EP 0843881A1
Authority
EP
European Patent Office
Prior art keywords
adhesive
individual
positioning
stacking
individual sheets
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
Application number
EP95929089A
Other languages
German (de)
English (en)
Other versions
EP0843881B1 (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

Links

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, in particular for the production of transformer cores, according to the preamble of claim 1, and to a device for laminating such laminated cores, according to the preamble of claim 11.
  • gluing the individual sheets within a sheet stack has several advantages. Regardless of whether the actual layering process is carried out manually or automatically, the finished laminated core can be transported and stored at the end of the layering process without special precautions. There is no danger that a previously built-up offset will shift between individual layers or between individual layers.
  • the bending stability of a laminated core is considerably improved by the gluing, which has an advantageous effect in particular in the case of long laminated cores.
  • the adhesive layer between the individual sheets leads to an improvement in the electrical properties of a transformer core, since the adhesive acts as an insulator, and on the other hand to a reduction in transformer noise, since the individual sheets cannot vibrate.
  • a liquid or paste-like adhesive is introduced between the facing side surfaces of the individual sheets at one or more points before they are laid one on top of the other.
  • the amount and placement of the adhesive can be checked relatively easily.
  • other adhesive techniques would also be conceivable, such as, for example, the preparation of the individual sheets using a hot melt adhesive or the like.
  • the adhesive is particularly advantageously metered in a punctiform or linear manner to at least one Side surface applied so that the adhesive is distributed over the entire surface when placed on top of one another. Due to the capillary effect, the adhesive is distributed over the entire surface of a single sheet, without it escaping from the end face and without any areas which are not bonded remaining.
  • the amount and the arrangement of the dosage can be determined empirically or mathematically.
  • an adhesive-free zone is cut out at the ends of the individual laminates in such a way that ends lying on top of one another can be bent open relative to one another. The ends can then be pushed together in a particularly interlocking manner by slightly bending the ends of one side.
  • the holding down means that the last sheet deposited is pressed against the previous sheet and that the adhesive lying in between is correctly distributed. On the other hand, it also prevents the deposited sheet from shifting when the new adhesive layer is applied.
  • Automation of the layering process can be achieved in that the individual sheets are brought up on a longitudinal conveying means and are transferred with a first transverse conveying means to a positioning table, where they are positioned in a relative position corresponding to the stacking position, that the positioned individual sheets with a second Quertransport ⁇ be transferred from the positioning table to a stacking table, where they are sequentially glued to the laminated core and that the finished laminated core is transferred to another means of transport for transportation away.
  • the upstream connection of the positioning table relieves the gluing process of the need for simultaneous positioning. All that is left to do is glue on the stacking table, the relative position of each individual sheet having already been determined on the positioning table.
  • An adhesive can be used that hardens at room temperature.
  • the sheet stack has its final stability at the end of the rest period without any further operations.
  • the invention also relates to a device for layering laminated cores, which enables the described method to be carried out easily.
  • This device is characterized by the features in claim 11.
  • the adhesive The substance metering device ensures that the adhesive is applied consistently without the layering process being impaired.
  • a lowerable holding-down device can also be arranged above the stacking table and can be pressed against the individual sheet lying on top.
  • a postioning table is arranged next to the stacking table and is provided with positioning means for the correct positioning of each individual sheet.
  • a transverse transport means is arranged between the positioning table and the stacking table, which enables a single sheet to be gripped on the positioning table and placed on the stacking table.
  • Suitable positioning means are already known to the person skilled in the art. These can be threading bolts which engage in an opening in the individual sheets. Alternatively, push-on devices are also conceivable, which are pushed onto the outer edges of a single sheet and push the latter into the correct relative position. Suction grippers or magnetic grippers are suitable as cross-transport means.
  • FIG. 1 shows a top view of the core of a multi-stage three-phase transformer
  • FIG. 2 shows a cross section through the core according to FIG. 1,
  • FIG. 3 shows the side view of a glued laminated core with different layers and layers
  • FIG. 3a shows a detail from the laminated core according to FIG. 3,
  • Figure 4 is a highly schematic plan view of a Work station for layering a laminated core
  • FIG 5 is a side view of the work station according to Figure 4, and
  • Figure 6 shows the bonding of a single sheet in four stages.
  • Figures 1 and 2 show a known multi-stage core 1 for a three-phase transformer. This consists of a yoke 2 and 2 ', an outer leg 3 and 3' and a middle leg 4. In cross section, two first stages 5 and 5 ', two second stages 6 and 6' and a third can be arranged symmetrically Level 7 can be distinguished. Of course, more complicated or simple laminated bodies can also be built up.
  • Figures 3 and 3a show a laminated core 8, which could be, for example, the step of a leg or a yoke according to Figures 1 and 2.
  • the laminated core has the entire layer thickness S and is composed of individual laminations 9 which are stacked to form individual layers 10. Each layer in turn consists of a layer 11.
  • a position offset 12 between the layers 10 and a layer offset 13 between the layers 11 are provided.
  • an adhesive layer 14 is arranged over the entire surface between the individual sheets 9.
  • FIGS. 4 and 5 show a largely automated work station for carrying out the method according to the invention.
  • the work station essentially consists of a positioning table 18 on which positioning means 20, for example in the form of push-on elements, are arranged.
  • a stacking table 19 Parallel to the positioning table is a stacking table 19, which is designed as a lifting table and can be displaced in the direction of arrow f relative to the support surface of the positioning table.
  • the stacking table has support beams 27 arranged in a comb-like manner as a support surface.
  • the individual sheets 9 are fed to the work station on a longitudinal conveyor 15, which can be, for example, a conveyor belt.
  • a first transverse transport means 16, which can be displaced in the direction of arrow d, ensures the transport from the longitudinal transport means 15 to the positioning table 18.
  • a second transverse transport means 17, which can be displaced in the direction of the arrow e the individual sheets can be moved from the positioning table 18 to the stacking table 19 be transported.
  • At least one hold-down device 21 and at least one metering device 22 for the adhesive are also arranged above the stacking table 19.
  • the metering device and the hold-down device are movably mounted in such a way that they can be brought from an inoperative position into an operating position. Dosing devices, in particular microdosing pumps for the metered application of adhesive, are already known to the person skilled in the art from other technical fields.
  • a stacking trolley 24 is provided for the further transport of the glued laminated core 8, which also has comb-like support beams 28. These are dimensioned such that they can be inserted between the support bars 27 of the stacking table. As additional aids, clamping plates 25 and 25 'are provided, between which a completely glued laminated core can be pressed together. The pressing force is applied with the help of tie rods 26.
  • FIG. 6 is also used for the description of the layer process below.
  • a single sheet 9 arrives in the direction of arrow a on the longitudinal transport means 15 in parallel in front of the positioning table 18 from a loading station (not shown here) or from the cross-cutting unit.
  • the first transverse transport means 16 transports the single sheet in the direction of arrow b to the positioning table.
  • the positioning means are activated there, so that the individual sheet is aligned precisely with respect to the central axis and longitudinal position. Any offset in the longitudinal direction can be produced.
  • the individual sheet, which is aligned precisely in this way, is transported by the second transverse transport means 17 in the direction of arrow c onto the stacking table 19 or onto a stack already located there.
  • the suction cups 23 hold the single sheet plane-parallel to the base.
  • the hold-down device and the metering device remain in a rest position in which the feed of the single sheet is not hindered.
  • the holding-down device can be lowered simultaneously or subsequently to the lowering of the sheet onto the stack (FIG. 6b).
  • the vacuum suction devices 23 of the second transverse transport means can now be raised and can already be returned to the positioning table 18 for receiving a new sheet.
  • the holding-down device 21 presses the single sheet that has just been deposited against the stack and at the same time an adhesive is applied in a punctiform manner from the metering device 22. A linear order would also be conceivable. Finally, the adhesive could also be sprayed on from spray nozzles (FIG. 6c).
  • the hold-down device and the metering device are then moved back into the rest position in the direction of arrow h so that the entire depositing process can be repeated with a new individual sheet.
  • the device is programmed so that no more adhesive is applied to the top single sheet of a package.
  • the completely assembled and glued package 8 is now transferred to the stacking trolley 24, which for this purpose is moved in under the stacking table 19 in the direction of arrow g, the comb-like support beams 27 and 28 intermeshing.
  • the stacking trolley 24 By further lowering the stacking table 19, the package is lifted off the stacking table and the stacking carriage 24 can be extended.
  • the laminated core 8 is now pressed together with the aid of the clamping means mentioned, and it can remain on the stacking carriage 24.

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)

Abstract

On colle les unes aux autres les tôles individuelles (9) qui forment un paquet (8) de tôles empilées. A cet effet, on introduit un adhésif liquide ou pâteux entre les faces latérales opposées des tôles individuelles avant de les empiler. On effectue cette opération sur une table d'empilage (19) au-dessus de laquelle est monté un dispositif de dosage qui applique des doses d'adhésif. Avant le collage, les tôles individuelles peuvent être correctement positionnées sur une table de positionnement (18). Le collage des tôles individuelles permet de stocker, de transporter et d'assembler plus facilement les paquets de tôles empilées.
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 true EP0843881A1 (fr) 1998-05-27
EP0843881B1 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
EP3562006A4 (fr) * 2016-12-22 2020-07-29 Mitsui High-Tec, Inc. Procédé et dispositif de fabrication d'un noyau feuilleté

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
EP1764808A1 (fr) 2005-09-15 2007-03-21 Siemens Aktiengesellschaft Méthode et disposiitif pour fabriquer un paquet du tôles

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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9706539A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3562006A4 (fr) * 2016-12-22 2020-07-29 Mitsui High-Tec, Inc. Procédé et dispositif de fabrication d'un noyau feuilleté

Also Published As

Publication number Publication date
DK0843881T3 (da) 2000-01-17
EP0843881B1 (fr) 1999-06-16
ES2135080T3 (es) 1999-10-16
DE59506253D1 (de) 1999-07-22
WO1997006539A1 (fr) 1997-02-20
GR3031062T3 (en) 1999-12-31

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