EP2660836A2 - Transformer core stacking system and method for its operation - Google Patents

Abstract

The system has a discharge conveyor for transporting cut metal sheets (1-5), and a stacking station that is provided with several layers of transformer core (6). A polygonal rotary stacker receives layer of metal sheets, and a transport apparatus for rotary stacker transports metal sheets from a receiving station to a storage position. A height adjustable stacking device stores the metal sheets. The stacking device is provided with a driven gear. An independent claim is included for a method for operating transformer core stacking system.

Description

The invention relates to a fully automatic transformer core stacking system for connection to a transformer sheet cutting and punching system with a discharge conveyor belt for transporting cut sheets and with a stacking station for a transformer consisting of several individual layers transformer core and a method for operating the Transformerenkern- stacker.

The vast majority of transformer cores for, for example, distribution or power transformers consists of a five-leg construction. Stacked becomes an "E" with separate yoke package. This separate yoke package is manually nested after mounting the coil around the center leg to a closed transformer core. To a lesser extent, 1-phase transformer cores are laid in open C-shape.

In the FIG. 1 a stack is shown for such a known E-core 6 with separate yoke stack of a five-leg construction for a medium power transformer of 1000 kVA in step-lap design and nine-stage attitude. The stack 6 has three legs with sheets 1 to 3, which are connected by a first yoke of sheets 4. A second yoke with sheets 5 is parallel to the sheets 4 of the first yoke. This second yoke with the sheets 5 is finally nested in the completion of the transformer to the open legs of the E-core 6 in a known manner.

The FIG. 2 shows the center leg of the E-core 6 with the sheets 2 in cross section along the section AA of FIG. 1 , Since the structure in nine stages 7 is recognizable, ie the center leg with the sheets 2 forming package consists of several layers of the same size thin sheets, which together form one of the stages 7. Beginning with a layer of small sheets, a layer with next larger sheets follows, until the 5th stage, the middle layer 8, is reached. Then smaller sheets are used again, so that the steps 7 rejuvenate. The corners or edges of the steps 7 lie on a circle 9.

The practice of conventional manual transformer core production is as follows:
It is cut and stacked on transformer strip cutting and stacking individual sheets to laminations of the respective sheet metal shapes for the legs or yokes. These laminated cores are placed after removal from the stacking point to a so-called assembly table. Sheet metal for sheet metal is then stacked sheet by sheet, layer by layer, to the required core on this assembly table.

A very small number of E-stackers are already in use worldwide, working with mechanical-pneumatic or mechanical-magnetic handling systems.

The sheets are picked up individually, ie one after the other and laid. This stacking is very time consuming. For this reason, the e-stacking systems designed to date have not found much resonance on the market.

Depending on the length of the sheets or size of the core, the handling is done by one or more people.

With increasing thin sheet metal or reduction of the sheet thickness up to 0.15 mm, the manual stacking is critical or impossible, because with sheets of, for example, over 1 m in length for a Jochpaket with punched V-neck for receiving the middle leg can be a buckling or bending at a 0.15 mm thick, insulated, highly sensitive sheet as good as unavoidable. However, kinking or damaging the insulated, very expensive transformer sheet inevitably leads to rejects of the sheet metal.

Also, the manual core stacking according to the variety of sheets for a core is very time consuming and therefore costly.

In the past, mainly transformer sheets in the thickness range from 0.32 mm to 0.27 mm were processed. However, the transformer industry has urged the relevant metallurgical industry to progressively thinner sheet grades, e.g. 0.23, 0.18 mm thickness range. At the moment, one strives for 0.15 mm thick transformer sheet.

The requirements of the transformer industry meet the urgent need to increase the efficiency and efficiency of the transformers and to reduce the losses.

Increasing energy demand, including in developing countries, is also increasing efforts in the energy sector to reduce every percentage of losses in pipelines and transformers.

This has the consequence that, for example, in an average power transformer core of about 240 mm height of the respective package, in a calculated Tape thickness of 0.27 mm, 888 sheets / package must cut and stack. It follows that with a complete core, consisting of 3 legs and 2 yokes, corresponding to 5 core packages, 4444 sheets have to be cut and stacked.

With an equally large core with a sheet thickness of 0.15 mm, however, 1600 sheets / package, ie 8000 sheets would have to be cut and stacked on the complete core. This means an increase of the laying capacity of approx. 80%.

An increase in the cutting and stacking time of 80% in manual core production is due to the wage structure in the industry in Western countries in terms of global acquisition for reasons of price can not cope or the transformers can not be offered more competitive.

In today's practice, transformer cores for distribution and for power transformers mainly in the so-called step-lap process, ie in overlapped stacking produced, as shown in the FIG. 1 is apparent. Furthermore, as is known, the transformer cores are stacked in packages of different widths one above the other, as is known from US Pat FIG. 1 is recognizable. This means, for example, that a nine-stage core is created from sheets that have five different bandwidths.

For this reason, you need for each packet width a corresponding coil with appropriate bandwidth in the system. After required or completed number of cut and stacked sheets, the tape roll must be replaced or replaced with another role with appropriate bandwidth.

The result is an effort to produce as many sheets of a bandwidth as possible to minimize plant setup times by changing the coils. This means to integrate the largest possible number of stacking points in the fully automatic system.

Since the practice of placing orders of transformers in distribution to medium power transformers always takes place in more or less large batch sizes, this situation comes in favor of the large number of stacking points or benefit.

From the sum of the individual criteria mentioned above, a system design for the future results as follows:
Low-priced, fully automatic high-performance systems for core production with relatively simple charging and discharging coupled with manageable handling and reliable automation are required.

Conventional stacking systems, such as from the DE 26 13 150 D1 As is known, the individual sheets, which come from the discharge conveyor belt of the cutting system or the scissors and punching line, are individually combined to form an E core with a separate yoke. Such systems are only in small numbers in use, since the techniques and controls practiced to date are too costly and their laying performance is not amortized.

Also, attempts have been made to optimize the manual laying of core sheets into an E-stack, starting from five stacked core packages, by laying robots; but with unsatisfactory success, since it can never be ruled out that one raises two sheets from a stack and thus the core is useless.

In other conventional systems, such as from the DE 25 30 309 known, every single sheet must be picked up from the discharge conveyor belt. The turntables with increasing core weight critical torques or centrifugal forces which try to move the precisely fixed core packages within the sheets in the packages.

So weighs a 1000 kVA core with max. Bandwidth of 224 mm, such as in FIG. 1 is shown, about 1960 kg. Also, the additional mass weight of the turntable requires a correspondingly high drive power as well as a stable and very cost-intensive design both statically and dynamically.

By the EP 184 563 A1 For example, a transformer magnetic core stacking system has become known which comprises a plurality of magazines in which different sets of sheets are stacked for the magnetic core. The magazines can be positioned as required in a peeling position, in the gripping and transfer elements record a set that corresponds to a stage of the core to be manufactured, and store it at a mounting location. Such a stacking system is very complex, in particular with regard to the gripping and transfer elements, and overall very slowly.

From the DE 10 2007 030 491 B3 For example, such a method is known for producing transformer cores in which transformer cores are produced directly from the manufacturing plant for the individual sheets. For this purpose, a plurality of sheets of a leg side of the transformer core stacked on stacking tables and a plurality of sheets of a yoke side stacked on stacking tables are first stacked in at least two in the conveying direction of the sheets stacked stacking stations. After the side processing of the stacking tables, in the stacking stations, a plurality of sheets of the other leg side of the transformer core are stacked on the stacking tables and a plurality of sheets of the other yoke side are stacked in receivers. After the further lateral process of the stacking tables, a plurality of sheets of the center leg of the transformer core is alternately stacked on top of each other, wherein at the same time handling systems, the packets of sheets of a yoke side in the right-angle position to the conveying direction rotate. Thereafter, the handling systems deposit the packets of sheets of one yoke side with their ends at the one ends of the packets of the sheets of the leg sides and the packets of the sheets of the center leg on the stacking tables. Following the lateral movement of the stacking tables to the starting position, the method steps described up to here repeat until reaching the total height of the respective transformer core, which is an open E-transformer core, on whose sides and whose center limb the windings are later applied. Only then are the sheets of the other yoke side stacked on the tray tables by hand applied to the thigh sides and center leg of the E-transformer core by hand.

The invention is based on the object, a transformer core stacking system and a method for operating a transformer core stacking system of the type mentioned in such a way that complete transformer cores can be made in any form directly from the transformer sheet cutting and punching system, starting opposite the known systems, the efficiency of the entire system is considerably increased and the cost of manufacturing the transformer cores are significantly reduced.

The object is achieved for a transformer core stacking system of the type mentioned by the features specified in claim 1. Advantageous embodiments are specified in the dependent claims.

The object is achieved in that the transformer core stacker as Hochleistungsstransformatorenkern stacking system at least one polygon forklift for receiving immediately successive, promoted on the Auslauftransportband, all belonging to a transformer core layer sheets, a transport device for the polygon rotary stacker with the Sheet metal from a receiving location to a respective Laying position, and each has a height-adjustable stacking device for storing the sheets.

The automatic polygon rotary stacker ensures that complete, arbitrarily shaped transformer cores can be picked up and stacked in layers directly from the transformer sheet cutting and punching system where the individual sheets are produced with high efficiency for the entire system The cost of manufacturing the transformer cores is reduced considerably, simply because of the polygon rotary stacker.

It has proven to be advantageous if the polygon forklift hangs on a carriage with an actuator in an orbit that the lower part of the carriage has a driven by a rotary drive turntable, so that a mounted carriage with a drive device and the polygon rotation stacker pivot is, and that on the turntable a lifting and lowering device for height adjustment of the polygon forklift is mounted.

According to the invention, a hydraulic cylinder actuate the lifting and lowering device.

Advantageously, a drive motor can put the polygon rotary stacker in gradual rotational movement, so that successively all receiving surfaces of the polygon rotary stacker are assigned to the outlet conveyor belt for receiving the sheets at the receiving point.

Preferably, the stacking device for depositing the sheets may have a height-adjustable lifting plate with holes which are arranged in a pattern, that of the arrangement of the holes in the sheets of the transformer core corresponds, wherein protrude through the holes in the lifting plate guide caps of mandrels, which guide the sheets in their placement in the correct position.

The stacking device can be adjusted in height advantageous if the lifting plate laterally from a base frame of the stacking device outstanding pressure surfaces or Hubnasen and if on the base frame outside a plurality of synchronized lifting elements for the tilt-free height adjustment of the lifting plate are attached to the projecting from the base frame Hubnasen the Engage lift plate.

The plates can be easily fixed if guide rails are attached to the base frame.

Advantageously, the stacking device may be provided with a drivable suspension.

It has proven to be advantageous if the stacking device is provided with a lifting table for a second lifting plate on which a perforated plate is located when the perforated plate has bores which are each provided with a socket for receiving the receiving cone of a receiving mandrel receiving cone, and if provided in the located above the perforated plate lifting plate guide rings for the guided through the holes receiving mandrels, which preferably consist of the guide caps provided with clamping screws, are provided.

According to the invention, at least three polygonal rotary stackers and at least two stacking stations are provided which at the same time either pick up metal sheets from the outfeed conveyor belt or deposit them on one of the stacking stations.

The advantage is that a cut sequence and lay program is provided for the sheets, and that the cut sequence and lay program has a sheet receiving sequence of 3-2-4-5-1 and a sheet laying order of 1-5 -4-2-3.

The object is achieved by a method for operating a transformer core stacking system of the type mentioned by the features specified in claim 12 features.

• S1 Positionieren des ersten Vieleck-Rotationsstaplers vor der Aufnahmestelle,
• S2 Aufnahme einer Vielzahl von zu einer Lage gehörender, unmittelbar aufeinander folgender Blechen von dem Auslauftransportband mittels des ersten Vieleck-Rotationsstaplers,
• S3 Verfahren des ersten Vieleck-Rotationsstaplers von der Aufnahmestelle zu seiner Legeposition,
• S4 Positionieren des zweiten Vieleck-Rotationsstaplers vor der Aufnahmestelle, S5 Ablegen der Bleche von dem ersten Vieleck-Rotationsstapler auf einer Stapelvorrichtung und
• S6 gleichzeitiges Aufnehmen einer Vielzahl von zu einer Lage gehörender, unmittelbar aufeinander folgender Blechen von dem Auslauftransportband mittels des zweiten Vieleck-Rotationsstaplers,
• S7 Verfahren des zweiten Vieleck-Rotationsstaplers von der Aufnahmestelle zu seiner Legeposition,
• S8 falls alle Bleche durch den ersten Vieleck-Rotationsstapler abgearbeitet wurden, weiter mit S11, ansonsten Wiederholen von S1,
• S9 Ablegen der Bleche von dem zweiten Vieleck-Rotationsstapler auf der ersten oder aber auch auf einer zweiten Stapelvorrichtung,
• S10 falls alle Bleche durch den zweiten Vieleck-Rotationsstapler abgearbeitet wurden, weiter mit S11, ansonsten Wiederholen von S4 und
• S11 Ende des Stapelvorganges.

The object is achieved according to the invention by the following steps for a method for operating a transformer core stacking system with a device mentioned above:

• S1 positioning of the first polygonal rotary stacker in front of the pick-up point,
• S2 receiving a plurality of sheets of sheet metal immediately following one another from the outfeed conveyor belt by means of the first polygon rotary stacker,
• S3 method of the first polygonal rotary stacker from the receiving location to its laying position,
• S4 Positioning of the second polygonal rotary stacker in front of the pick-up point, S5 Placing the metal sheets from the first polygon rotary stacker on a stacking device and
• S6 simultaneously picking up a plurality of immediately adjacent sheets from the outfeed conveyor belt by means of the second polygonal rotary stacker,
• S7 method of the second polygonal rotary stacker from the receiving location to its laying position,
• S8 if all the sheets have been processed by the first polygon forklift, continue with S11, otherwise repeat S1,
• S9 depositing the sheets from the second polygonal rotary stacker on the first or on a second stacking device,
• S10 if all the sheets have been processed by the second polygon forklift, continue with S11, otherwise repeat S4 and
• S11 End of the stacking process.

Figur 1

eine erste Sicht auf einen bekannten Musterkern in einer Transformatorenkern-Stapelanlage,

Figur 2

eine Aufsicht auf den Musterkern gemäß Figur 1 entlang der Schnittlinie A-A,

Figur 3

eine erfindungsgemäße Anlage mit einer Stapelstation für zwei Vieleck-Rotationsstapler,

Figur 4

eine erfindungsgemäßen Anlage mit zwei Stapelstationen für drei Vieleck-Rotationsstapler,

Figur 5

ein Vieleck-Rotationsstapler zum Einsatz in Figur 3 oder 4,

Figur 6

eine Schnittfolge der Bleche zur Aufnahme durch den Vieleck-Rotationsstapler,

Figur 7

eine Lege- bzw. Ablagefolge der Bleche,

Figur 8

erste Systemvariante des Vieleck-Staplers mit auf- und abwärts Bewegung des Rotationskopfes,

Figur 9

weitere Systemvariante des Vieleck-Staplers mit beweglichen Aufnahmeplatten,

Figur 10

eine Blechübergabe von auf einem Auslauftransportband liegenden Blechen,

Figur 11

eine alternative Blechübergaben vom Auslauftransportband mit hängenden Blechen,

Figur 12

eine Aufnahme für ein hängendes Blech vom Auslauftransportband,

Figur 13

mögliche Ausführungsbeispiele eines Aufnahmekopfes des Rotationsstaplers,

Figur 14

Blechaufnahmen für ein Kernpaket bzw. im Transformatorenkern mittels Spannschrauben mit aufsetzbaren Führungskappen,

Figur 15

Grundaufbau der Blechaufnahme für einen Stapelwagen,

Figur 16

eine Frontansicht des Stapelwagens,

Figur 17

eine Seitenansicht des Stapelwagens,

Figur 18

eine Draufsicht auf eine Hubplatte in dem Stapelwagen,

Figur 19

eine Draufsicht auf eine Lochplatte in dem Stapelwagen,

Figur 20

eine Draufsicht auf eine zweite Hubplatte in dem Stapelwagen,

Figur 21

einen Konstruktionsaufbau einer Transformatorenkern-Stapelanlage,

Figuren 22 bis 25

Beispiele von möglichen Schnittfolgeprogramme und

Figur 26

Verfahrensschritte zum Betrieb einer Transformatorenkern-Stapelanlage.

The invention is explained in more detail with reference to embodiments shown in the drawing. Show it:

FIG. 1

a first view of a known pattern core in a transformer core stack plant,

FIG. 2

a view of the pattern core according to FIG. 1 along the section line AA,

FIG. 3

a system according to the invention with a stacking station for two polygon rotary stackers,

FIG. 4

a system according to the invention with two stacking stations for three polygonal rotary stackers,

FIG. 5

a polygon rotary stacker for use in FIG. 3 or 4 .

FIG. 6

a cutting sequence of the sheets for acceptance by the polygonal rotary stacker,

FIG. 7

a laying or depositing sequence of the sheets,

FIG. 8

first system variant of the polygon stacker with up and down movement of the rotary head,

FIG. 9

further system variant of the polygonal stacker with movable mounting plates,

FIG. 10

a sheet transfer of lying on an outlet conveyor belt sheets,

FIG. 11

an alternative sheet metal transfer from the outfeed conveyor with hanging sheets,

FIG. 12

a receptacle for a hanging sheet metal from the outlet conveyor belt,

FIG. 13

possible embodiments of a receiving head of the rotary stacker,

FIG. 14

Sheet metal supports for a core package or in the transformer core by means of clamping screws with attachable guide caps,

FIG. 15

Basic structure of the sheet metal receptacle for a stacking cart,

FIG. 16

a front view of the stacking cart,

FIG. 17

a side view of the stacking cart,

FIG. 18

a top view of a lifting plate in the stacking cart,

FIG. 19

a plan view of a perforated plate in the stacking cart,

FIG. 20

a plan view of a second lifting plate in the stacking cart,

FIG. 21

a construction of a transformer core stacking plant,

FIGS. 22 to 25

Examples of possible cutting sequences and

FIG. 26

Method steps for operating a transformer core stacking system.

In the FIG. 3 a core stacking plant is shown with a stacking station 10 for one or two polygon rotary stackers. On a discharge conveyor belt 11, the sheets 1 to 5 are shown for the transformer core. Furthermore, an oval orbit 12 can be seen as the roadway for the / the polygon rotary stacker.

From an upstream integrated cutting and stamping system, the sheets 1 to 5 for the transformer core are conveyed from the outfeed conveyor belt 11 to a receiving station 13, from where they are picked up by a polygon rotary stacker, as will be described later. Then the polygon rotary stacker moves on the orbit 12 in the laying position 14 to store them there on the stacking station 10, as will be described below. At the same time, a second polygon rotary stacker can travel to the pickup point 13 and remove the next sheets 1 to 5 for the transformer core from the outfeed conveyor belt 11. In order to deposit the sheets 4 and 5, the polygon rotary stacker is pivoted at the pivot point 15 by 90 °. In this and the following figure, the sheets 1 to 5 are not reproduced to scale for the transformer core for clarity.

The cutting order of the sheets 1 to 5 for the transformer core may be 3-2-4-5-1. This is also the recording sequence. The sequence is against it backwards 1-5-4-2-3. This variant is to be preferred, as it combines the shortest laying time with the least material loss (see also FIGS. 22 to 25 ).

The FIG. 4 shows a core stacking plant with two stacking stations 10 and 10 'for example, three polygon rotary stacker. One of the polygonal rotary stacker receives at the pickup point 13 of the outfeed conveyor belt 11 five sheets 1 to 5 for the transformer core, while the second polygonal rotary stacker stores the five sheets 1 to 5 on the stacking station 10, and the third polygon rotary stacker the five sheets 1 to 5 on the stacking station 10 'stores

Based on FIG. 5 Now, the transformer sheet-receiving sequence by a polygon forklift 16, here a pentagonal rotary stacker, briefly explained. On the outfeed conveyor belt 11 is below the corresponding surface of the polygon rotation stacker 16, the sheet metal 3. Next, the polygon rotation stacker 16 rotates in the direction of the rotation arrow 17, while the outfeed conveyor belt 11 is moved, for example, to the right. The associated cutting sequence is in the FIG. 6 and the corresponding filing in FIG. 7 shown for which the order is 1-5-4-2-3. It should be noted that the radius 18 must be greater than the sum of height 19 and lifting height 20 so that during rotation of the R-stacker 16 this does not touch the sheets 1 to 5 for the transformer core on the outfeed conveyor belt 11.

In the FIGS. 8 and 9 are alternative sheet metal recordings represented by the polygon rotary stacker 16. The lifting height 20 of the polygonal rotary stacker 16 per sheet metal receiving is radius 18 minus height 19 plus safety distance of the polygonal rotary stacker 16 during rotation over the transformer sheet 3 on the outfeed conveyor belt 11. The polygon rotary stacker 16 according to FIG. 8 must always after each sheet receiving by a fixed amount, the lifting height 20, be raised so that the respective corner with the radius 18 can rotate over the discharge conveyor belt 11 without collision.

In accordance with the subject FIG. 9 For example, in the region of each receiving surface, the polygon rotating stacker 16 has movable receiving plates 21, which can be raised and lowered, for example, by means of plungers 22. As a result, the main body of the polygon rotation stacker 16 only needs to rotate and not be moved perpendicular to the outfeed conveyor belt 11.

The polygonal rotary stacker 16 can easily rotate with the radius 18 on the outfeed conveyor belt 11, since the receiving plates 21 snap back after sheet reception with the sheet in the starting position and release the polygon forklift 16 for rotation.

Based on FIGS. 10 and 11 Alternative sheet transfers are shown by the discharge conveyor belt 11. In the FIG. 10 is the outlet conveyor belt 11 for resting sheets 1 to 5 and in the FIG. 11 for hanging sheets 1 to 5 formed for the transformer core.

The FIG. 12 illustrates a recording of hanging on the outfeed conveyor belt 11 sheets 1 to 5 for the transformer core by the polygon rotation stacker 16. In this embodiment, the polygonal rotary stacker 16 can easily take over the hanging sheets 1 to 5 for the transformer core, without as in resting sheets 1 to 5 for the transformer core by a fixed amount, the lifting height 20, to be moved, since the sheets from the outfeed conveyor belt 11 can be taken over falling from the magnetic recording of the polygon rotation stacker 16. Thus, only one rotation according to rotation arrow 17 is required.

Based on FIG. 13 alternative designs of a polygon rotavator 16 for bandwidths of max. 224 mm for transformer cores up to max. 1000 kVA shown. For an assumed reference diameter 23 of 500 mm of the polygon rotation stacker 16 results in a lifting height 20 of about 25 mm. Since the larger the diameter, the smaller the lifting height 20, a lifting height 20 would be 35 mm, for example, given a diameter 24 of 400 mm of the polygonal rotary stacker 16 '. It is important to consider whether the lift height 20 is to be as small as possible, for example, to electromagnetically tighten the sheet metal from a height of 20 mm. This would eliminate the need for one stroke per plate and thus increase stacking performance (5 times lower and 5 times lift off). Otherwise, a small diameter of, for example, 400 mm allows a higher rotational speed.

In the FIG. 14 a mandrel 25 is shown consisting of a clamping screw 26 with a guide cap 27 as a tip, which detect the discarded plates 1 to 5 for the transformer core of the polygon forklift 16 and stack clean to a sheet stack 28 on a lifting plate 29. The ejection height 30 of the sheets above the sheet stack 28 with a core stack height 31 fixed by the screw head with guide cap 27 should be kept as constant as possible, as will be described below. The screwed-on guide cap 27 on the clamping screw 26 prevents jamming or falling of the falling sheets 1 to 5 for the transformer core or their inhibition in the case. With increasing core stack height 31, the sheet discharge height (eg 15 mm) is fixed by program-controlled continuous lowering of the lifting plate 29 in the vertical z-axis.

In the FIG. 15 is a basic structure for a below described in more detail stacking cart. The lifting plate 29 has a guide ring 32 for the guided through a bore in the lifting plate 29 receiving mandrel 25 with clamping screw 26 and guide cap 27. A perforated plate 33 arranged under the lifting plate 29 is provided with bores into which a bush 34 for receiving a receiving cone 35 fastened to the clamping screw 26 is inserted is. The perforated plate 33 rests on a second lifting plate 36. The lifting plate 29 has a thickness 37 and a distance to the perforated plate 33, a lifting height 38, on.

1. 1) Die Oberkante der Hubplatte 29, die Stapelebene des Blechstapel 28, wird beispielsweise 15 mm unter die Abwurfhöhe 30 mittels außen angebrachter Hubelemente gefahren, wie dies nachfolgend noch beschrieben wird.
2. 2) Die Einstellhöhe D ergibt sich aus der Summe der Abwurfhöhe 30, der einstellbaren Kernstapelhöhe 31 + 38, der Dicke der Hubplatte 37, so dass sich beispielsweise 15 mm + 240 mm + 30 mm = 285 mm ergeben.
3. 3) Die Oberkante der Lochplatte 33 wird mittels der zweiten Hubplatte 36 bzw. deren Hubaggregat auf die einstellbare Hubhöhe 38 gefahren.
4. 4) Nach Stapelbeginn wird die Hubplatte 29 kontinuierlich entsprechend der anfallenden Bleche pro Minute abgesenkt. Somit bleibt die einstellbare Abwurfhöhe 30 immer konstant.

This stacking system allows any desired adjustable core stack height 31 in the range of the respective core sizes. An adjustment of the desired core stack height 31 of, for example, 240 mm can be carried out in such a way:

1. 1) The upper edge of the lifting plate 29, the stacking plane of the sheet stack 28, for example, 15 mm driven below the discharge height 30 by externally mounted lifting elements, as will be described below.
2. 2) The setting height D results from the sum of the discharge height 30, the adjustable core stack height 31 + 38, the thickness of the lifting plate 37, so that, for example, 15 mm + 240 mm + 30 mm = 285 mm result.
3. 3) The upper edge of the perforated plate 33 is moved by means of the second lifting plate 36 or its lifting unit to the adjustable lifting height 38.
4. 4) After the stack has started, the lifting plate 29 is lowered continuously in accordance with the number of sheets produced per minute. Thus, the adjustable discharge height 30 always remains constant.

In the FIG. 16 the stacking cart 39 is shown with a base frame 40 in front view, which is provided with a drivable suspension 41. The stacking cart 39 is provided with a hydraulic or Spindelhubtisch 42, which can raise the second lifting plate 36 and thus the perforated plate 33 thereon. On the base frame 40 a plurality of synchronized lifting elements 43 are mounted externally for the height adjustment of the lifting plate 29, which engage on protruding from the base frame 40 pressure surfaces or Hubnasen 44 of the lifting plate 29 and these are able to raise it.

In the FIG. 17 the stacking cart 39 is shown with its base frame 40 in side view. The externally mounted synchronized lifting elements 43 for the height adjustment of the lifting plate 29 act on Hubnasen 44 of the lifting plate 29 a.

In the FIG. 18 the stacking cart 39 is shown in plan view with the lifting plate 29. The hole pattern corresponds to the holes of the sheets 1 to 5 of the transformer core. Through the holes in the lifting plate 29 protrude the guide caps 27 of the mandrels 25, which guide the sheets 1 to 5 in their deposition in the correct position. Clearly protruding from the base frame 40 Hubnasen 44 of the lifting plate 29 can be seen. Guide rails 45 guide or fix the lifting plate 29, the perforated plate 33 and the second lifting plate 36, wherein arranged on the base frame 40 synchronously controlled lifting elements 43 prevent the plates can tilt.

The FIG. 19 shows the stacker carriage 39 in plan view with the perforated plate 33. From the hole pattern corresponding to the holes of the sheets 1 to 5 of the transformer core arranged holes protrude the clamping screws 26 of the mandrels 25th

In the FIG. 20 For the sake of completeness, the stacking trolley 39 is shown in plan view with the second lifting plate 36 after removal of the lifting plate 29 and the perforated plate 33.

In the FIG. 21 the construction of the transformer core stacking system according to the invention is shown, in which the polygonal rotary stacker 16 is attached to a carriage 46 with CNC actuator, which is slidably held on the orbit 12. The power is absorbed via a conductor rail in the orbit. By means of a worm drive or rotary drive 47, a turntable 48 can be rotated as a pivotable lower part of the carriage 46, so that the attached polygon rotary stacker 16 can be pivoted. By means of a lifting and lowering device 49, the polygon rotary stacker can be Adjust 16 in height, with a hydraulic cylinder 50 acts on the lifting and lowering device 49. A drive motor 51 causes the polygon rotation stacker 16 to rotate, so that successively all receiving surfaces of the polygon rotation stacker 16 of the receiving point 13 on the outfeed conveyor belt 11 for receiving the sheets 1 to 5 are facing. By the CNC-controlled drive device 53 for the lower carriage of the hanging carriage 46, this can for example by a required travel 52 in the x-direction, or after pivoting of the turntable 48 by means of the rotary drive 47 by 90 ° to a required travel 52 in y- Direction are shifted.

Based on FIGS. 22 to 25 Examples of possible cutting sequence programs to the pattern core 1000 kVA are schematically shown, in which the sheets 1 to 5 are shown for the transformer core, as they are cut on the outfeed conveyor belt 11. In the FIG. 22 a non-scraping program is shown that generates unproductive scrap 54. The order is 4-5-3-2-1 when recording and 1-2-3-5-4 when playing.

The cut sequence program according to FIG. 23 has no optimal laying time. The order is 3-4-5-2-1 when recording and 1-2-5-4-3 when playing.

This in FIG. 24 shown cut sequence program with an order when recording 3-5-4-2-1 and when placing 1-2-4-5-3 is again not scrap-saving.

The FIG. 25 Now shows an optimal cutting sequence program with a recording sequence of 3-2-4-5-1, which is scrap-saving and has an optimal order of 1-5-4-2-3.

Based on FIG. 26 Now, the individual process steps for operating a transformer core stacking system according to the invention will be explained in more detail.

In a first method step S1, the first polygonal rotary stacker 16 is positioned in front of the receiving point 13 in such a way that it can remove all metal sheets 1 to 5 from the outfeed conveyor belt 11.

According to a second step S2, the recording of all sheets 1 to 5 belonging to a layer which follow each other directly from the outfeed conveyor belt 11 takes place by means of the first polygon rotation stacker 16.

Subsequent to method step S3, the first polygon rotation stacker 16 is moved from the receiving location 13 to its laying position 14.

In parallel, a second polygon rotation stacker (16) is positioned in front of the receiving location 13 in the fourth method step S4.

In the process step S5 and S6 take place the sheets 1 to 5 of the first polygonal rotary stacker 16 on a stacking device 39 and simultaneously receiving a plurality of belonging to a layer, immediately successive sheets 1 to 5 of the outlet conveyor belt 11 by means of second polygon rotary stacker 16.

S7 method of the second polygonal rotary stacker (16) from the receiving point (13) to its laying position (14, 14 '),

In the eighth step S8, a query or check is made as to whether all the sheets 1 to 5 have been processed by the discharge conveyor belt 11 by the first polygon rotation stacker 16. If yes, it follows as a further method step S11, otherwise the method steps beginning with S1 are repeated.

According to method step S9, the sheets 1 to 5 are deposited by the second polygon rotation stacker 16 on the first or on a second stacking device 39.

Then, in step S10, a query or check is made as to whether all the metal sheets 1 to 5 have been processed by the outfeed conveyor belt 11 by the second polygon rotation stacker 16. If yes, it follows as a further method step S11, otherwise the method steps are repeated beginning with S4.

In step S11, the batch processes are ended. The polygonal rotary stackers 16 can be moved aside in the orbit in a parking position and the stacking device 39 are brought from the laying position 14.

In the production of Transformenkenkemen by fully automatic stacking by means of rotating polygonal stacker, a core stacking system according to the invention is fed directly from the integrated cutting and punching machine with the corresponding core sheets 1 to 5, i. the cutting unit is fed by means of coils which are used in the respective bandwidth according to the core structure, and the respective required sheets are e.g. 1 to 5 are produced in the system by punching, punching and cutting and fed via a discharge conveyor belt 11 of the stacking station.

From the outlet conveyor belt 11, the respective sheets are stopped programmatically at the receiving point 13 and from the polygon rotation stacker 16 (FIG. FIG. 3 ) accepted.

The polygon rotation stacker 16 takes in the position of the receiving point 13 by rotation in succession to the sheets 1 to 5. For efficiency reasons, however, the sheet metal receptacle in the order 3-2-4-5-1 (see FIG. 6 ).

The 16 always picks up only one of the sheets 1 to 5 from the discharge conveyor belt 11, thus the risk of receiving two sheets as in the use of robots, etc., which remove the sheets from a stack or package excluded.

After receiving the five sheets 3-2-4-5-1 by the polygon rotation stacker 16 this moves programmatically in the x-axis to the positioned tray of sheets 1-5-4-2-3.

After storing sheet 1, the polygon rotary stacker 16 travels programmatically in the x-axis to the intersection with the y-axis. During this drive, the polygon rotation stacker 16 pivots by + 90 ° and places the sheets 5 and 4 programmatically in the y-axis.

After storing sheet 4, the polygonal rotary stacker pivots 90 ° back into the x-axis to deposit the sheets 2 and 3.

After storing sheet 3, the polygon rotary stacker 16 moves programmatically in the orbit 12 in the position of the receiving point 13 back to the next recording of the sheets 3-2-4-5-1.

In the meantime, ie, during the time of the described laying cycle, a second identical polygon forklift 16 may begin the above-described picking cycle immediately after the last sheet 1 of the previous sheet has been picked up by the first polygon rotary stacker 16 with sheet 3 of the next layer according to the current cutting program, and then to stack a second layer on the same core.

According to FIG. 4 It is also possible for two or more cores to be stacked at the same time, ie the second polygonal rotary stacker 16, and possibly a third polygon rotary stacker 16 or even more polygon rotary stackers 16 do not stack on the same core but on different cores. This second core or cores in the stacking station 10 'need not necessarily be the same size as the first core in the stacking station 10, provided that the number of stages and the respective step widths with the corresponding number of sheets match the core in stacking station 10, ie the lengths of leg and yoke laminations may be different.

Thus, it is alternatively also possible to produce two different cores with one and the same program, but at least three polygon rotation stackers 16 should be used for two different cores.

The smaller the transformer cores, the smaller the lengths of the individual sheets 1 to 5 for the transformer core, i. The cutting performance of the cutting and punching system must increase linearly.

The E-stacker can be extended by any number of stacking stations 10 and 10 ', by increasing the oval orbit 12 and increasing the number of polygon rotary stackers 16. The more stacking stations 10 and 10 'there are, the less bandwidth changes are required.

As already described, transformer belt cutting systems can be designed with different outfeed conveyor belts 11, depending on the stacking system. When using FIG. 10 described outlet conveyor belt 11 with resting sheets or according to FIG. 11 with hanging sheets.

When transferring hanging sheets from the discharge conveyor belt 11 reduces the time of transfer to the polygon forklift, because you can from a small height (in the mm range) targeted the sheets, i. positioned on the receiving plates 21 of the polygon forklift 16 drop and fix it there magnetically, before the subsequent rotation of the next to be taken sheet.

The polygonal rotary stacker 16 can therefore be used either with outfeed conveyor belts with overlying metal sheets as well as with outfeed conveyor belts with hanging metal sheets.

The main advantage of this core stack version is the time-saving, i. short metal lay-up times, since the inclusion of five sheets corresponding to a complete position of the core is carried out in one position and all five sheets must be transported only once in the x- and y-axis. It saves 5 times the transport routes to the individual discharge points of the respective plates 1-5-4-2-3 and the 4-fold return trips from the stacking points 1 to 5 to the beginning of the receiving point 13th

This time saving decides on the profitability of a core stacking plant, since normally the cutting part is many times faster than a stacking part. For this reason it is optimal, the sum of the stacking power of the sum of the cutting power by max. Equate stacking speed.

On the other hand, if stacking has been optimized or compressed as in the above-mentioned concept, on the other hand, fewer stacking stations are required in order to achieve an optimum price / performance ratio. In addition, the stacking concept described above is inexpensive, since only a few axes are to be controlled and a low mechanical complexity is required, especially expensive turntables not but the E-cores with their separate yoke can be stacked on relatively simple, height-adjustable stationary stacking tables.

The basis of the FIGS. 16 to 20 stationary stacking tables described are fixed and locked in a position corresponding to the CNC program with fixed discharge positions.

The stacking tables are subject only to a controlled continuous lowering operation corresponding to the core stacking height 31. The stacking tables are subjected to neither rotation nor transverse displacement in the x- or y-axis during the entire stacking process.

For this reason, a shifting or slipping of the extremely thin sheets is excluded even in the so-called step-lap method. Especially after completion of the stacking process, the five core packages are pressed together by the holes of the clamping holes by means of screws in order to avoid a shift within the core by the subsequent transport from the plant. It is also possible to stack large and largest transformer cores with this concept.

A stacking trolley 39 functioning as a stacking table consists of a box-shaped base frame 40 with two lifting plates 29 and 36. The lifting plate 36 is movable in the vertical direction, for example, by a scissor or spindle lifting table, while the lifting plate 29 is stroke-controlled by means of synchronized lifting elements 43.

On the second lifting plate 36 is the perforated plate 33 for receiving the fixed in the perforated plate 33 clamping screws 26, as the FIG. 15 shows. The grid The holes in the perforated plate 33 correspond to the respective holes in the core sheets 1 to 5.

On the lifting plate 29 is the stack package. This decreases with the lifting plate 29 with increasing core stack height continuously to always ensure a low adjustable, fixed discharge height of the sheet.

The sheets in the order 3-2-4-5-1 come in the aforementioned fully automatic core stacking on the outlet conveyor belt 11 of the cutting and punching system positioned to the receiving point 13 of the polygon forklift, for the basis of Figures 3 and 4 described acquisition by the polygon rotary stacker 16.

The polygon rotation stacker 16 consists essentially of a driven polygonal drum with five surfaces for receiving one sheet metal 1 to 5 for the transformer core. The recording of the individual sheets 1 to 5 is carried out by rotation of the polygon rotation stacker 16 on the receiving point 13 and simultaneous lowering and lifting the polygon rotary stacker 16 in time with the sheets 1 to 5 to be recorded, as shown in the FIGS. 8 and 9 is illustrated. After the inclusion of the five sheets 1 to 5 of the polygon forklift 16 moves in the x-axis direction on the orbit 12 for the positioning of sheet metal 1. After a 90 ° rotation further in the y-axis for filing the sheets 5 and 4 and after a 90 ° rotation back to the x-axis for storage of the sheets 2 and 3 by displacement on the orbit 12th

The storage of the sheets 1 to 5 takes place by means of positioned rotation of the polygonal rotary stacker 16 and by ± 90 ° pivoting of the polygonal rotary stacker 16 from the x- to the y-axis and back. After the sheet 3 has been deposited, the polygon rotary stacker 16, positioned in the oval orbit 12, moves back to the receiving position 13 to take up a layer of five sheets again.

In the meantime, i. during the time of the described pick and place cycle, a second identical polygon forklift 16 'has begun the pick / place cycle previously described, immediately after the last sheet 1 of the previous sheet has been picked up by the first polygon rotary stacker 16 with sheet 3 of the next layer, according to the current cutting program to stack a second layer.

Alternatively, the polygonal rotary stacker 16 can also with controlled receiving plates 21 according to FIG. 9 for reasons of shorter recording and discharge times of sheets 1 to 5 are equipped. Since the switched magnetic recording plates 21 have only a low weight compared to the mass of the polygon rotation stacker 16, shorter recording and discharge times are achievable, especially when the receiving plates 21 are made of aluminum construction or lightweight construction.

Both the receiving plates 21 and the five receiving surfaces of the polygon rotation stacker 16 can be equipped with electromagnets.

To increase the discharge speed, additional compressed air nozzles are used.

At the in FIG. 8 It must always be raised by a fixed amount, the lifting height 20, after each sheet holder, so that the respective corner of the polygon with the radius 18 can perform a rotation 17 without collision via the outfeed conveyor belt 11.

At the in FIG. 8 It can easily rotate with the radius 18 on the outlet conveyor belt 11 illustrated polygon-rotating stacker 16, since the receiving plates 21 immediately after the sheet holder snap back into their starting position and release the polygon forklift 16 for rotation.

At the in FIG. 12 In the embodiment shown, the polygonal rotary stacker 16 can easily take over the hanging metal sheets 1 to 5 from the outfeed conveyor belt 11 without having to be moved by a fixed amount, such as sheets 1 to 5 falling from the outfeed conveyor belt 11 from the receiving plates be taken over.

These core stack versions according to the invention result in time-saving, i. Short Blechlegezeiten, since the inclusion of five sheets 1 to 5 is made according to a complete position of the core in one position and all five sheets 1 to 5 must be transported only once in the x- and y-axis.

It saves 5 times the transport routes to the individual discharge points of the respective sheets 1-5-4-2-3 and the 4-fold return trips from the stacking points of the sheets 1 to 5 to the beginning of the receiving point 13th

This time saving decides on the economics of a core stacking plant, since normally the cutting part is much faster than a stacking part. For this reason, it is optimal to equate the sum of the stacking capacity with the sum of the cutting capacity due to the maximum stacking speed.

On the other hand, if one has optimized the stacking capacity as in the above-mentioned concept, fewer stacking stations are required in order to achieve an optimum price / performance ratio. In addition, the stacking concept described above is inexpensive to manufacture, especially since complex mechanical handling is not needed, but the E-cores can be stacked with their separate yoke on relatively simple, height-adjustable stationary stacking tables.

The stationary stacking tables are fixed and locked in a position corresponding to the CNC program with fixed discharge positions. The stacking tables are subject only to a controlled continuous lowering operation corresponding to the core stack height. The stacking tables are subject during the entire stacking process neither a rotation nor a transverse displacement in the x- or y-axis. For this reason, a shifting or slipping of the extremely thin sheets is excluded even in the so-called step-lap method. Especially after completion of the stacking process, the five core packages are pressed together by the holes of the clamping holes by means of screws in order to avoid a shift within the core by the subsequent transport from the plant. In this way it is also possible to stack large and largest transformer cores with this concept.

The in the FIGS. 16 and 17 illustrated stacking table or stacking cart 39 consists of a base frame 40 with driven chassis 41 to drive out of the system can. In the base frame 40, a hydraulic or Spindelhubtisch 42 is integrated, on which the second lifting plate 36 is located.

On this second lifting plate 36 is the perforated plate 33 for receiving the clamping screws 26 (eg M12). The clamping screws 26 have for smooth ejection of the sheets 1 to 5 attachable plastic caps as guide caps 27 (see FIG. 15 ). The clamping screws 26 are seated in the receiving cone 35 of the perforated plate 33. The receiving cone 35 always guarantees a 90 ° angle to the perforated plate 33 to ensure proper stacking or to accurately fix the individual sheets 1 to 5 according to their holes in the core. The clamping screws 26 serve simultaneously during the entire stacking process the growing core as a stabilizer, since always the sheet with the smallest width in the Kernlagenanfang and end and thus with increasing core stack height has a stable position or a labile position is avoided.

Furthermore, the recording cone 35 with self-locking allows a biasing of the stack package, since otherwise there is no way to prevent the torsion of the clamping screw 26. Only when the nut has developed enough tensile force over the washer on the stack package, the clamping screw 26 is pulled out of its seat in the cone 35. Then you can lift the clamping screw 26 to below the guide ring 32 and compress together with this stack package. The PVC guide ring 32 will then serve as a washer at the same time. (Alternatively, you can still save the tensioning screw 26 with a hex key (SW6) before their torsion by pulling the clamping screw 26 with her mother completely.

The perforated plate 33 must be replaced after each change of a core type against another, the next core type corresponding perforated plate 33, since the grid of the clamping holes of each core type are different. The perforated plates 33 can be pre-equipped outside the plant.

The perforated plate 33 is adjusted with the associated second lifting plate 36 in the vertical z-axis according to the desired stack thickness, i. lowered or lifted. Assuming a core stack height of 240 mm, the perforated plate 33 would have to be positioned below the dump position by the following amount: desired core stack height (31 + 38) e.g. 240 mm + lifting plate height (37) e.g. 30 mm + discharge height (30) e.g. 15 mm, thus D = 285 mm below the fixed discharge height.

The lifting plate 29 decreases continuously with increasing core stack height or in small steps to always ensure a low discharge height 30 of, for example, 15 mm of the sheet.

This lifting plate 29 has four Hubnasen or pressure surfaces 44 with trailer bolts. These pressure surfaces 44 are integrated in the lifting plate 29 and each run outwardly projecting in the respective gate openings of the base frame 40, as in particular the Figures 17 and 18 demonstrate. The protruding from the base frame 40 pressure surfaces 44 are each lowered by synchronized lifting elements 43 programmatically in the vertical z-axis and lifted. Alternatively, screw jacks can also be used.

After reaching the required core stack height 31 of the transformer core is lifted together with the lifting plate 29 from the base frame 40 and a so-called tilting table for further storage of the transformer core or for mounting the coil to the center leg formed from the sheets 3 and the manual nesting of the yoke plates 5 in fed to the core.

The clamping screws 26 with guide cap 27 and a low discharge height 30 of the respective sheet to be stacked transformer core significantly affect the stacking speed and the exact discharge position or core stacking, as they are indispensable for stacking a step-lap core.

The discharge height of the sheets above the stacking point must be as low as possible in order to increase the laying speed and to avoid a so-called floating of the discarded sheet. In this so-called swimming, the discarded sheet briefly generates an air cushion between the sheet and tray, which can lead to lateral deflection of the sheet.

The clamping screws 26 seated in the cone 35 allow a tensioning of the transformer core before removal and thus prevent any movement of the sheets in the leg package and the leg packages with each other. Furthermore, the tensioning screws 26 stabilize the transformer core or package at its growing core stack height throughout the stacking process. The clamping screws 26 guarantee during the entire stacking process a 90 ° storage of the sheets in the stack package.

The transformer core stacking system according to the invention has a high stacking capacity per stacking point due to short sheet metal receptacles and short sheet metal laying times. The inclusion of five sheets corresponding to a position of the core is made by the polygon rotary stacker 16 at the receiving point 13 at a time. Thus, five sheets are transported only once in x- and y-axis.

The special stacking tables, as described, provide an adjustable constant minimum discharge height 30 (e.g., 15 mm) of the individual sheets 1 to 5 by the program-controlled continuous lowering of the stacking pallet in the lifting frame 40 as described.

Furthermore, for the transformer core stacking system according to the invention, the smaller the transformer cores are, the smaller the lengths of the individual sheets are, i.e., the smaller the transformer cores are. The cutting performance of the cutting and punching system must increase linearly.

The E-stacking system according to FIG. 4 can be extended by any number of stacking stations 10 and 10 ', by increasing the oval orbit 12 and increasing the number of polygon rotary stacker 16. It is true that the more stacking stations 10 and 10 'provided, the less bandwidth changes are required.

This larger number of stacking stations is particularly opposed to the production of small and medium distribution transformers, as due to the short sheets, the cutting times are very short or the number of cut and stamped sheets 1 to 5 is very high and thus more and more stacking stations can be used.

Also, the stacking system can be inexpensively manufactured for structural reasons, both mechanically, as well as in the course of mechanics and electrical control, since only two elements, the polygon rotation stacker 16 and the stacking carriage 39 must be controlled. There are four CNC controls according to FIG. 21 for the polygon rotary stacker 16 and a CNC drive according to Figur16 required for the hydraulic or Spindelhubtisch 42 of the stacker carriage 39.

The first control causes the programmed rotation of the polygon rotation stacker 16.

The second control allows programmed control of the suspended carriage 46 with the integrated turntable 47 and the polygon rotating stacker 16 on the oval orbit 12.

The third control moves by means of the drive device 53 hanging on the turntable 48 slide with the polygon forklift 16, for storing the sheets 4 and 5. In this case, the separate path of the y-axis of the polygon forklift 16 for the storage of sheets 4 and 5 needed.

The fourth drive acts on a drive of the turntable 48 to perform the pivoting ± 90 ° from the x-axis to the y-axis and back. This drive can also be performed hydraulically.

The fifth control enables the lifting and lowering operation of the stacking table.

The stacking table or stacking cart 39 according to the invention allows an adjustable, always constant, low discharge height 30 of the sheets 1 to 5. Furthermore, the stacking carriage 39 favors a bracing of the stacked transformer core before transport or even in the system by means of special clamping screws 26 and their special application.

Also, the stacker carriage 39 according to the invention prevents the tensioned, i. compressed transformer core any moving the sheets 1 to 5 in the core and the thigh and yoke packages with each other.

Moving only one sheet in each package would result in a complete manual unstacking of the package until it reaches the displaced sheet in place.

The handling of the system and thus the stacking system is clear.

The stacked core lying on the stacking pallet or on the lifting plate 29 can be removed with the same from a stacker or a roller conveyor on the back of the stacking point. In the same way, the station can be equipped again with a new range or with the lifting plate 29. LIST OF REFERENCE NUMBERS 1 Sheets for first leg 2 Sheets for middle thighs 3 Sheets for second leg 4 Sheets for first yoke 5 Sheets for second yoke 6 E core 7 stages 8th center position 9 circle 10 stacking station 11 Outlet conveyor belt 12 oval orbit 13 receiving location 14 retaining position 15 pivot point 16 Polygon rotary stacker 17 rotation arrow 18 radius 19 height 20 Lifting height 21 Mounting plates 22 tappet 23 Reference diameter 24 diameter 25 arbor 26 clamping screw 27 guide cap 28 sheet pile 29 lifting plate 30 fixed discharge height 31 Core stack height 32 guide ring 33 perforated plate 34 Rifle 35 receiving cone 36 second lifting plate 37 Thickness of the lifting plate 38 Lifting height 39 stacking trolley 40 base frame 41 landing gear 42 Hydraulic or spindle lifting table 43 Synchronized lifting elements 44 Hubnasen 45 guide rails 46 hanging cart 47 rotary drive 48 slewing ring 49 Lifting and lowering device 50 hydraulic cylinders 51 drive motor 52 adjustment 53 driving device 54 Scrap waste x X axis y y-axis z z-axis

Claims (12)

Transformer core stacking plant for connection to a transformer sheet cutting and punching system with a discharge conveyor belt (11) for transporting cut sheets (1 to 5) and with a stacking station (10) for a transformer core consisting of several individual layers,
characterized,
in that the transformer core stacking installation has at least one polygonal rotary stacker (16) for receiving immediately successive metal sheets (1 to 5) conveyed on the outfeed conveyor belt (11), all belonging to one transformer core layer, a transport device for the polygonal rotary stacker (16 ) with the sheets (1 to 5) from a receiving point (13) to a respective laying position (14, 14 '), and each one adjustable in height stacking device (39) for storing the sheets (1 to 5). Transformer core stacking system according to claim 1,
characterized,
in that the polygonal rotary stacker (16) is suspended from an orbit (12) via a carriage (46) with an actuator, that the lower part of the carriage (46) has a turntable (48) which can be driven by means of a rotary drive (47), so that one is attached thereto fixed carriage with a drive device and the polygon forklift (16) is pivotable, and in that on the turntable (48) a lifting and lowering device (49) for height adjustment of the polygon forklift (16) is mounted. Transformer core stacking system according to claim 1 or 2,
characterized,
in that a hydraulic cylinder (50) is provided for the actuation of the lifting and lowering device (49). Transformer core stacking plant according to one of claims 1 to 3,
characterized,
in that the polygonal rotary stacker (16) is assigned a drive motor (51) which is able to offset the polygon rotation stacker (16) in a stepwise rotational movement so that all the receiving surfaces of the polygon rotation stacker (16) are successively received by the outlet conveyor belt (11) the sheets (1 to 5) at the receiving point (13) can be assigned. Transformer core stacking plant according to one of claims 1 to 4,
characterized,
in that the stacking device (39) for depositing the sheets (1 to 5) has a height-adjustable lifting plate (29) with holes arranged in a pattern, the arrangement of holes in the sheets (1 to 5) of the transformer core corresponds, and that through the holes in the lifting plate (29) guide caps (27) of receiving mandrels (25) protrude, which guide the sheets (1 to 5) in their laying in the correct position. Transformer core stacking system according to one of claims 1 to 5,
characterized,
in that the lifting plate (29) has protruding pressure surfaces or lifting lugs (44) laterally out of a base frame (40) of the stacking device (39), and that a plurality of synchronized lifting elements (43) are mounted on the outside of the base frame (40) for height adjustment of the lifting plate (29) on the base frame (40) projecting Hubnasen (44) of the lifting plate (29) engage. Transformer core stacking plant according to one of claims 1 to 6,
characterized,
that inside the base frame (40) guide rails (45) are mounted. Transformer core stacking plant according to one of claims 1 to 7,
characterized,
that the stacking device (39) is provided with a drivable undercarriage (41). Transformer core stacking plant according to one of claims 1 to 8,
characterized,
in that the stacking device (39) is provided with a lifting table (42) for a second lifting plate (36) on which lies a perforated plate (33), in that the perforated plate (33) has bores which are each provided with a bush (34) for receiving a receiving cone '(35) of a receiving mandrel (25) are provided, and that in the above the perforated plate (33) located lifting plate (29) provided bores guide rings (32) for the guided through the bores receiving mandrels (25) consisting of clamping screws (26) and guide caps (27) may consist are provided. Transformer core stacking plant according to one of claims 1 to 9,
characterized,
in that at least three polygonal rotary stackers (16) and at least two stacking stations (10) are provided which at the same time either pick up metal sheets (1 to 5) from the outfeed conveyor belt (11) or place them on one of the stacking stations (10). Transformer core stacking plant according to one of claims 1 to 10,
characterized,
that a cutting sequence and laying program is provided for the sheets (1 to 5), and that the cutting sequence and laying program has a sheet receiving sequence of 3-2-4-5-1 and a sheet laying order of 1- 5-4-2-3. Method for operating a transformer core stacking installation according to one of claims 1 to 11,
marked by,
following steps: S1 positioning the first polygon rotation stacker (16) in front of the receiving location (13), S2 receiving a plurality of sheet-like sheets (1 to 5) belonging to one sheet from the outfeed conveyor belt (11) by means of the first polygon rotary stacker (16), S3 method of the first polygonal rotating paper (16) from the receiving point (13) to its laying position (14, 14 '), S4 positioning the second polygonal rotary stacker (16) in front of the receiving location (13), S5 depositing the sheets (1 to 5) from the first polygonal rotary stacker (16) on a stacking device (39) and S6 simultaneous picking up of a plurality of sheets (1 to 5) belonging to one layer from the outfeed conveyor belt (11) by means of the second polygonal rotary stacker (16), S7 method of the second polygonal rotary stacker (16) from the receiving point (13) to its laying position (14, 14 '), S8 if all of the sheets (1 to 5) provided for a transformer core have been processed by the first polygonal rotary stacker (16), continue with S11, otherwise repeat S1, S9 depositing the sheets (1 to 5) from the second polygonal rotary stacker (16) on a second stacking device (39) S10 if all of the sheets (1 to 5) provided for one transformer core have been processed by the second polygonal rotary stacker (16), continue with S11, otherwise repeat S4 and S11 End of the stacking process.

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