EP0184563A1 - Dispositif pour l'assemblage de noyaux magnétiques pour transformateurs électriques et appareils analogues - Google Patents

Dispositif pour l'assemblage de noyaux magnétiques pour transformateurs électriques et appareils analogues Download PDF

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Publication number
EP0184563A1
EP0184563A1 EP85830294A EP85830294A EP0184563A1 EP 0184563 A1 EP0184563 A1 EP 0184563A1 EP 85830294 A EP85830294 A EP 85830294A EP 85830294 A EP85830294 A EP 85830294A EP 0184563 A1 EP0184563 A1 EP 0184563A1
Authority
EP
European Patent Office
Prior art keywords
laminations
grip
plant according
assembly
transfer
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
EP85830294A
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German (de)
English (en)
Other versions
EP0184563B1 (fr
Inventor
Elena Legnaioli-Giuli
Luciano Legnaioli
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.)
LEGNAIOLI GIULI ELENA
LEGNAIOLI L
Original Assignee
LEGNAIOLI GIULI ELENA
LEGNAIOLI L
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.)
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Publication date
Application filed by LEGNAIOLI GIULI ELENA, LEGNAIOLI L filed Critical LEGNAIOLI GIULI ELENA
Priority to AT85830294T priority Critical patent/ATE51318T1/de
Publication of EP0184563A1 publication Critical patent/EP0184563A1/fr
Application granted granted Critical
Publication of EP0184563B1 publication Critical patent/EP0184563B1/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 object of the invention is to provide a plant for the automatic assembly of magnetic cores for electric transformers or other made up of die-cut laminations, by avoiding at most the manual intervention.
  • the plant comprises: at least a store of shaped laminations with which to form a core or a step of a core; means for the grip and transfer of the laminations from the store in order to transfer them onto an assembly plane, said grip means being able to place the laminations in the assembling arrangement; and means to obtain the repetition of the action of the grip and transfer means in order to form steps with a predetermined number of laminations.
  • said grip and transfer means may comprise mobile frames which move above the stores and the assembly plane, and,on said frames, members or equipment moving in orthogonal direction to the frames and forming vertical guides for sucker lifting means or the like.
  • Said moving members and/or said frames are operated through catches or step-by-step motors or equivalent means to bring the laminations close to each other in the assembling arrangement and stagger subsequent laminations or groups of laminations.
  • the plant may comprise - in order to form stepped cores - a number of stores, each one for the laminations relevant to one step, and means for subsequently transferring said stores to a position of picking up by the grip and transfer means.
  • the stores may be realized either by means of a platform or by carriages which are movable along rail tracks or equivalent and connected between them or otherwise independent of each other.
  • each of the grip and transfer means comprises at least two suckers able to engage the lamination towards the end portions thereof, and a possible central catch in order to achieve.a curvature convex in the lower part of the lamination which is being lifted, apt to facilitate the separation thereof from the remaining pile of the laminations.
  • Programming means may be provided to set up an automatic execution of the grip and transfer of the laminations and their laying down onto the various steps of the core with an automatic handling of the stores, frames, .grip and transfer means as well as of the catches or other delimitation means of the laying down position of the laminations.
  • the plant may include at least two assembly stations operating out of phase.
  • this invention relates to a flexible automatic plant apt to the assembling of magnetic cores for three-phase electric transformers, and for equivalent purposes.
  • a three-phase magnetic core is made up of three straight parallel elements, called columns, and of two elements, called yokes, also parallel between them but at right angle to the columns, which yokes close the magnetic circuit.
  • Each of the above elements consists of a plurality of matched ferromagnetic laminations.
  • Both the yokes and columns have sections of generally square or rectangular shape or inscribed in a circle and with a steps-like pattern. The stepped, or staircase section represents the most general case, while the square and rectangular ones are particular cases.
  • the stepped section is obtained by forming shaped laminations into rectangular packs, the laminations width corresponding to a certain set of strips, while the thickness of the packs is a consequence of the condition to achieve the perfect inscription of the cross section into a circle.
  • the filling coefficient of the circular section approaches the unity.
  • the number of steps is usually dependent on the cross-section diameter of the core components (yokes and columns) and is usually kept to a low value in order to simplify the shearing and assembly operations.
  • FIG. 1 An example of a complete magnetic core is shown in Figs. 1 and 2, Fig. 1 showing the core as a whole, while - Fig. 2 shows the stepped section of the columns and yokes.
  • the external columns C E have the interspace I O and the yokes G have the interspace H O .
  • the central column is indicated by C C .
  • ⁇ N is the diameter of the circumscribed circumference and E, F are, respectively, the minimum and maximum width of the used lamination strips.
  • the magnetic lamination strips are sheared according to the patterns or outlines shown in Fig. 3 in which, on the left, there is indicated an outline for the columns CE, in the centre an outline for column C c and on the right an outline for one of the yokes G.
  • Fig. 4 there is shown the relative position between the laminations of Fig. 3, to allow the assembly of the windings on the columns prior to the core completion with the second yoke. It must be observed in Fig. 4, that the successive laminations, making part of the assembly illustrated in Fig.
  • the following table shows, for a series of different electric powers, the sizing, the number of steps and the total weight of a core, by way of example only.
  • the three patterns (Fig. 3) of each assortment are usually mounted by hand on a plane provided with catches according to the positioning shown in Fig. 4 in which - as already mentioned - the solid line indicates the assembly of the patterns of the layers subsequently superimposed to the one indicated with dotted line, thereby the air-gaps between the laminations of the two adjacent planes or layers are displaced of a few millimeters to each other, which is a requirement arising from the characteristics of the magnetic material used.
  • the thickness is obtained of the step corresponding to a predetermined width of laminations. At this point the assembly is carried out of the patterns having width corresponding to the next step.
  • the above described assembly is usually carried out by hand with an endless repetition of similar movements and work-times which can be hardly quantified since the laminations have a thickness ranging within a few tenths of a millimeter.
  • the automatic arrangement is provided of the laminations intended to make up cores lacking in a yoke, and of dimensions that can broadly vary between a maximum and a minimum value.
  • Figs. 5 and 6 show respectively a plan view and an elevation view of the structural arrangement of the system.
  • a motorized rack device causes the displacement of the train of carriages 14 which are subsequently disposed and blocked at a precise work position P, and whose center line corresponds to the centre of the gap between the aerial guides of a track 16, this track being placed according to a direction X orthogonal to the movement direction Y of the track 12.
  • Numeral 18 indicates a positioning device.
  • the guides 16 are at a level above the carriages 14 and the relevant laminations piles, even with the maximum extent of the load.
  • Two motorized frames 20 and 22 can move along the guides 16.
  • the frame 22 may be caused to slide on guides 16 or on the frame 20, always in the direction X.
  • the frame 20 bears three mobile members or equipment 24, 26, 28 which are able to move in a direction Y orthogonal to guides 16, that is,'parallel to guides 12.
  • the frame 22 carries only one.member 30 being also able to move in the direction Y.
  • Each of members or equipment 24 to 30 carries vertical slide means for grip members each having two or more suckers connected to a vacuum plant and being selectively controllable.
  • the travels of frames 20 and 22 as well as those of members 24 to 30 are operated by sets of screws and nut screws actuated by small motors of suitable power, and said travels are exactly delimited by fixed catches previously positioned, or by other control systems, which-may be changed upon variation of the cores dimensions.
  • An assembly plane 32 suitably provided with a pallet support in the working position, is disposed on a weighing unit made up of load cells .or the like.
  • the core is formed in the arrangement indicated in Fig. 4 with the laminations being picked up one at a time by the carriage 14 in the position P in order to form then the laminations packs which form each step. After that, the carriage 14 is replaced in the position P in order to form the pack of another step, and so on.
  • the catches of frame 20 and those of member 30 are alternatively staggered of the few millimeters intended to obtain the staggered arrangement of the next layers of laminations and ensure the best connection of the magnetic flux at the intersection between yoke and columns.
  • the member 26 is intended to alternatively pick up - from the two laminations piles - the laminations which are to form the central column.
  • the two members 24 and 28 pick up the laminations of the two external columns and bring them close to each other in the assembling arrangement.
  • the member 30 picks up the laminations of the yokes and places them to be assembled by performing a displacement of a few millimeters according to the axis Y.
  • the travels of frames 20, 22 and of the mobile members 24 to 30 carried by the frames instead of being delimited by fixed stops or catches of mechanical type, may be exactly delimited by step-by-step or direct current small motors which are controlled through tachymetric dynamos or encoders.
  • the vertical movements of the suckers grip members may be realized by double-acting air pistons operated by electrovalves.
  • the lifting of the suckers is operated by an electric impulse; their stoppage is caused by reaching a predetermined level; the lowering of the suckers is also operated by an electric impulse; while the stoppage of said lowering takes place when the suckers reache the pile of laminations to be picked up from the carriage 14 at the position P, respectively when they reach the laminations pack to be formed on the assembly plane 32.
  • the operation of the plant is conceptually simple, and a working diagram of the displacements of frames 20 and 22, of members 24, 26, 28, 30 and of the suckers is syn- thetized in Fig. 7.
  • the displacements are operated by the motion realized by the small motors and through the interventions of the electrovalves on the air and vacuum circuit.
  • Fig. 7 the actuation phases are shown relevant to the positioning of the laminations of the two successive layers with staggered air-gaps. After the formation of a step the replacement of the store-carriage will also occur.
  • the succession of the various operations may be controlled by a program recorded on a microprocessor or computer having several outputs.
  • the signals coming from the microprocessor, and being processed within suitable interfaces, generate the operative controls for the opening and closing of the feeding circuits of the actuators (motors and electrovalves).
  • each carriage 14 is loaded with the patterns of sheared laminations corresponding to a determined step for a total weight approximately equivalent to the requirement of one step (double) multiplied by the number of cores. In this phase the laminations may also be counted.
  • the displacement of the group of carriages 14 causes the position P to be reached by the carriage of the step that, according to the work schedule, must be firstly assembled, and in said work position P said carriage is centered and blocked by the device 18.
  • the carriage 20 moves along the guides 16 up to the carriage vertical in the position P, and the members 24 and 28 reach a position above the groups of laminations of the external columns and the member 26 moves above one of the two piles of laminations of the central column.
  • Figs. 5 and 6 show the frame 22 while reaching, together with member 30, the position above the laminations pile of the yoke.
  • the frame 20 moves above the assembly plane 32 and the suckers with the picked up laminations move down from the members 24, 26, 28 to lay the laminations thereon.
  • the frame 22 which is previously moved up to a position corresponding to the store of the yoke patterns and which has been centered on the laminations pack, picks up, by the suckers lowering, the yoke lamination and brings it at the desired level.
  • the frame 22 is then moved above the assembly plane 32 along the guides 16 (or above the frame 20, parallel to guides 16), and from the member 30 - suitably positioned on the assembly plane 32 - the suckers lower and lay down the yoke lamination.
  • the two frames 20 and 22 move back above the carriage 14 at the position P.
  • the movements for the formation of the next layer are the same but the travels of the frames and members vary of those short lengths corresponding to the overlap of air-gaps, while the member 26 is brought above the opposite pile of laminations for the central column.
  • the number of laying operations can be .determined by a counting.
  • the already mounted part of the core is weighed, being provided that, to this purpose, the assembly plane is resting on load cells; possible differences from the provided weight may be thus compensated by adding or taking away laminations to and from the various steps or to and from the only central step.
  • a final weighing may be performed after the core completion, especially for statistical control.
  • the plant may also be provided with two or more assembly stations properly spaced apart and apt to be fed by the same stores but with a suitably staggered assembly cycle of one station relative to that of the other.
  • the number of store-carriages may be suitably increased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Housings And Mounting Of Transformers (AREA)
EP85830294A 1984-11-30 1985-11-28 Dispositif pour l'assemblage de noyaux magnétiques pour transformateurs électriques et appareils analogues Expired - Lifetime EP0184563B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85830294T ATE51318T1 (de) 1984-11-30 1985-11-28 Vorrichtung zum schichten von magnetkernen fuer transformatoren und dgl.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT955384 1984-11-30
IT09553/84A IT1198971B (it) 1984-11-30 1984-11-30 Impianto per il montaggio di nuclei magnetici per trasformatori elettrici ed altro

Publications (2)

Publication Number Publication Date
EP0184563A1 true EP0184563A1 (fr) 1986-06-11
EP0184563B1 EP0184563B1 (fr) 1990-03-21

Family

ID=11132101

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85830294A Expired - Lifetime EP0184563B1 (fr) 1984-11-30 1985-11-28 Dispositif pour l'assemblage de noyaux magnétiques pour transformateurs électriques et appareils analogues

Country Status (4)

Country Link
EP (1) EP0184563B1 (fr)
AT (1) ATE51318T1 (fr)
DE (1) DE3576759D1 (fr)
IT (1) IT1198971B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0251993A1 (fr) * 1986-05-22 1988-01-07 Ulrich Steinemann Ag Procédé et dispositif d'assemblage de paquets de tôle, en particulier pour noyaux de transformateurs
WO1997006539A1 (fr) * 1995-08-07 1997-02-20 Lagor S.R.L. Procede et dispositif d'empilage de toles, notamment pour produire des noyaux de transformateurs
DE19741364A1 (de) * 1997-09-19 1999-04-22 Vacuumschmelze Gmbh Verfahren und Vorrichtung zur Herstellung von aus Blechlamellen bestehenden Paketen für Magnetkerne
EP1717827A1 (fr) * 2005-04-25 2006-11-02 Siemens Aktiengesellschaft Procédé de fabrication d'un assemblage
DE102012009259A1 (de) * 2012-05-02 2013-11-07 Erich Fünfsinn Transformatorenkern-Stapelanlage zum Anschluß an eineTranformatorenblech-Schneid- und Stanzanlage sowieVerfahren zum Betrieb der Transformatorenkern-Stapelanlage
WO2019030350A1 (fr) * 2017-08-10 2019-02-14 Heinrich Georg Gmbh Maschinenfabrik Dispositif et système robotisé servant à fabriquer des noyaux de transformateur
IT202200009797A1 (it) * 2022-05-12 2023-11-12 Renzo Panfilo Apparato e metodo per la fabbricazione di nuclei di trasformatori

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1268719B (de) * 1964-03-10 1968-05-22 Licentia Gmbh Verfahren zum Schichten lamellierter Eisenkerne fuer Transformatoren und Drosselspulen groesserer Leistung
US3927454A (en) * 1973-04-13 1975-12-23 Hitachi Ltd Apparatus for producing laminated magnetic cores for inductive electric apparatus
FR2274126A1 (fr) * 1974-06-08 1976-01-02 Transformatoren Union Ag Dispositif d'empilage de toles pour la fabrication de noyaux de transformateurs
FR2313295A1 (fr) * 1975-06-07 1976-12-31 Transformatoren Union Ag Procede pour retirer plusieurs toles formant noyaux simultanement d'une pile
DE2530309A1 (de) * 1975-07-08 1977-01-13 Waldemar Von Lewin Verfahren und vorrichtung zum vollautomatischen elektronisch gesteuerten schichten fuer dreischenkelige transformatorenkerne mit saeulendurchmesser von 250 bis 1020 mm
DE2613150A1 (de) * 1976-03-27 1977-09-29 Transformatoren Union Ag Maschinelle transformatoren-kernfertigung
DE2845676A1 (de) * 1978-10-20 1980-04-30 Bbc Brown Boveri & Cie Vorrichtung zum selbsttaetigen schichten von lamellierten eisenkernen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1268719B (de) * 1964-03-10 1968-05-22 Licentia Gmbh Verfahren zum Schichten lamellierter Eisenkerne fuer Transformatoren und Drosselspulen groesserer Leistung
US3927454A (en) * 1973-04-13 1975-12-23 Hitachi Ltd Apparatus for producing laminated magnetic cores for inductive electric apparatus
FR2274126A1 (fr) * 1974-06-08 1976-01-02 Transformatoren Union Ag Dispositif d'empilage de toles pour la fabrication de noyaux de transformateurs
FR2313295A1 (fr) * 1975-06-07 1976-12-31 Transformatoren Union Ag Procede pour retirer plusieurs toles formant noyaux simultanement d'une pile
DE2530309A1 (de) * 1975-07-08 1977-01-13 Waldemar Von Lewin Verfahren und vorrichtung zum vollautomatischen elektronisch gesteuerten schichten fuer dreischenkelige transformatorenkerne mit saeulendurchmesser von 250 bis 1020 mm
DE2613150A1 (de) * 1976-03-27 1977-09-29 Transformatoren Union Ag Maschinelle transformatoren-kernfertigung
DE2845676A1 (de) * 1978-10-20 1980-04-30 Bbc Brown Boveri & Cie Vorrichtung zum selbsttaetigen schichten von lamellierten eisenkernen

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0251993A1 (fr) * 1986-05-22 1988-01-07 Ulrich Steinemann Ag Procédé et dispositif d'assemblage de paquets de tôle, en particulier pour noyaux de transformateurs
WO1997006539A1 (fr) * 1995-08-07 1997-02-20 Lagor S.R.L. Procede et dispositif d'empilage de toles, notamment pour produire des noyaux de transformateurs
DE19741364A1 (de) * 1997-09-19 1999-04-22 Vacuumschmelze Gmbh Verfahren und Vorrichtung zur Herstellung von aus Blechlamellen bestehenden Paketen für Magnetkerne
DE19741364C2 (de) * 1997-09-19 2000-05-25 Vacuumschmelze Gmbh Verfahren und Vorrichtung zur Herstellung von aus Blechlamellen bestehenden Paketen für Magnetkerne
US6588093B1 (en) 1997-09-19 2003-07-08 Vacuumschmelze Gmbh Method and device for producing bundles of sheet metal laminates for magnetic cores
EP1717827A1 (fr) * 2005-04-25 2006-11-02 Siemens Aktiengesellschaft Procédé de fabrication d'un assemblage
DE102012009259A1 (de) * 2012-05-02 2013-11-07 Erich Fünfsinn Transformatorenkern-Stapelanlage zum Anschluß an eineTranformatorenblech-Schneid- und Stanzanlage sowieVerfahren zum Betrieb der Transformatorenkern-Stapelanlage
DE102012009259B4 (de) * 2012-05-02 2016-01-21 Erich Fünfsinn Transformatorenkern-Stapelanlage zum Anschluß an eineTranformatorenblech-Schneid- und Stanzanlage sowieVerfahren zum Betrieb der Transformatorenkern-Stapelanlage
WO2019030350A1 (fr) * 2017-08-10 2019-02-14 Heinrich Georg Gmbh Maschinenfabrik Dispositif et système robotisé servant à fabriquer des noyaux de transformateur
US11521795B2 (en) 2017-08-10 2022-12-06 Heinrich Georg Gmbh Maschinenfabrik Method and robot system for producing transformer core
IT202200009797A1 (it) * 2022-05-12 2023-11-12 Renzo Panfilo Apparato e metodo per la fabbricazione di nuclei di trasformatori

Also Published As

Publication number Publication date
ATE51318T1 (de) 1990-04-15
DE3576759D1 (de) 1990-04-26
IT8409553A0 (it) 1984-11-30
IT1198971B (it) 1988-12-21
EP0184563B1 (fr) 1990-03-21

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