EP0529135A1 - Rotor for impact crushers or hammer mills - Google Patents

Rotor for impact crushers or hammer mills Download PDF

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Publication number
EP0529135A1
EP0529135A1 EP91114578A EP91114578A EP0529135A1 EP 0529135 A1 EP0529135 A1 EP 0529135A1 EP 91114578 A EP91114578 A EP 91114578A EP 91114578 A EP91114578 A EP 91114578A EP 0529135 A1 EP0529135 A1 EP 0529135A1
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EP
European Patent Office
Prior art keywords
rotor
disks
hubs
rotor disks
welding
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Granted
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EP91114578A
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German (de)
French (fr)
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EP0529135B1 (en
Inventor
Gerhard Hemesath
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Noell Service und Maschinentechnik GmbH
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Noell Service und Maschinentechnik GmbH
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Priority claimed from DE19914127875 external-priority patent/DE4127875C2/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26Details
    • B02C13/28Shape or construction of beater elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26Details
    • B02C13/28Shape or construction of beater elements
    • B02C13/2804Shape or construction of beater elements the beater elements being rigidly connected to the rotor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26Details
    • B02C13/28Shape or construction of beater elements
    • B02C2013/2808Shape or construction of beater elements the beater elements are attached to disks mounted on a shaft

Definitions

  • the invention relates to a rotor for impact or hammer mills, which consists of several welded rotor disks made of cast steel, which have widened, touching hubs.
  • the rotor disks have been welded to one another in their outer region (DE-GmS 18 31 058, DE-GmS 66 01 200) in order to achieve sufficient rigidity of the rotor body.
  • the weld seams are interrupted. This also applies to impact mill rotors welded together in this way, but the weld seams of which are long and complex. The manufacture of such rotors is correspondingly expensive.
  • the outer areas of the rotors are very exposed to wear, so that welds created there are also affected.
  • the invention has for its object from several Welding rotor disks assembled by welding in a safe and cost-saving manner. This is done in that the rotor disks are welded together by ring welds on the end faces of their hubs.
  • a particularly favorable effect in the production of these ring weld seams is to ensure that the rotor disks, when they rest against each other with their hubs, have a certain distance from one another in the outer zones, so that the welding machine used can reach all the way up to the hubs.
  • the ring weld seams can then all be produced at the same time by means of fixed welding devices that reach between the rotor disks and the hubs.
  • the welds required in the known welded rotors can only be produced by means of hand-held devices.
  • a rotor is known (DE-PS 33 17 070), in which annular rotor disks are welded with their inner edge onto a drum serving as an axis.
  • two weld seams have to be produced for each ring disk, while in the inventive design of the rotor, each ring weld seam connects two adjacent rotor disks to one another. This creates a stable rotor body which, for example, does not need to be guided on a shaft over its entire length, but can only be supported on the shaft at both ends, so that a more precise turning of the rotor disks is only partially necessary on the two end disks.
  • the rotor disks have a widened outer ring which is half that of the hub on both sides compared to the hub whose narrower is what is required as the distance between adjacent outer rims for the passage of a welding gun or a welding device to the hubs.
  • the rotor therefore consists exclusively of the rotor disks produced in cast steel and is consequently very cheap to manufacture.
  • the parts that form the widened outer ring of the rotor disks are machined or pre-processed before welding the hubs in order to create flat contact surfaces for the blow bars. Since the rotor disks with their hubs are only simple components and the centering of the rotor disks with respect to one another can be carried out very precisely, this eliminates the very complex machining of a finished rotor over the entire width. Post-processing may only be necessary in exceptional cases.
  • weld beads provided on the outer edges of the end faces of the hubs in particular in the case of large rotors, such as are used in primary crushers, cannot provide the necessary strength with regard to the impact and impact stresses occurring during the operation of such crushers exhibit.
  • the recesses provided for the weld seams on the end faces of the hubs extend from the outer edges over a considerable part of the radial thickness of the hubs and are filled with welding material.
  • the fabrication may be of considerable thickness welding seams can be done in different ways.
  • the most advantageous way of doing this is to form the weld seams from a plurality of layers laid one on top of the other.
  • the rotor disks which are centered, aligned in the circumferential direction and braced to one another, are rotated slowly and repeatedly in the horizontal axis position under the fixed welding machines reaching up to the hubs or between the aforementioned turns so that, basically, the grooves formed by two turns each starting with one weld over the other until the grooves are filled with welding material.
  • this can take place simultaneously in the presence of a number of welding devices corresponding to the number of slots in all slots of a rotor.
  • the welding machines are equipped with an automatic welding wire feeder and they are automatically reset by a distance corresponding to the thickness of the welding layers after each rotor revolution, the welding seams can be produced with a minimum of manpower and time, although the number of layers for large rotors is 50 or more and the length of the weld seams created in the individual grooves can be approximately 100 meters.
  • the depth of the grooves must of course be selected so that annular ribs with corresponding end faces remain on the hubs with which the adjacent hubs lie against one another when the rotor disks are clamped together.
  • These ribs may melt away during the welding process, so that the hubs, if the ribs are provided near the inner edges of the end faces, may then be welded together over the entire end face.
  • the rotor disks must, of course, be centered exactly with respect to one another, but also aligned with one another in the circumferential direction, so that the edge cutouts provided in the rotor disks are exactly aligned with one another. Since the clamping of the rotor disks takes place in a horizontal position, but the welding must be carried out with the rotor disks arranged vertically, i.e. with the rotor axis horizontal, the clamped rotor disks must be moved from one position to the other.
  • ring disks can be inserted into all cylindrical bores of the hubs and the rotor disks provided with the ring disks can be pushed onto a tube which later also serves to carry the unit consisting of the rotor disks which are temporarily connected to one another.
  • the cylindrical bores can also be chosen so narrow and the washers so wide that they engage in the bores of two adjacent rotor disks and thus center them directly with one another.
  • the rotor disks are placed one on top of the other with the interposition of an annular disk and then aligned with one another in the circumferential direction by rotating around the annular disks.
  • the hubs of the rotor disks not only from the outside but also from the inside with one however, only simple ring welds or those consisting of only a few layers are connected to one another.
  • the hubs are also provided with small bores which are to be provided within the annular ribs.
  • the rotors shown each consist of several rotor disks 1 made of cast steel, which are provided with a central cylindrical opening 2 and a wider hub 3 surrounding them. On the outer edge, depending on the type of crushing tools provided on them (impact hammers 4, blow bars 5), they have wider bearing bodies 6 and 7, respectively. In the cases shown in FIGS. 1-8, they are designed such that a gap between the bearing bodies of adjacent rotor disks 1 8 remains.
  • the hubs 3 of adjacent rotor disks 1 are firmly connected to one another at their outer edges by ring weld seams 9.
  • ring weld seams 9 To produce these ring weld seams, the rotor disks centered on the hubs 3 by means of dowel pins 10 and braced against one another are slowly rotated, fixed welding devices which reach the hubs through the gaps 8 producing the weld seam.
  • the impact hammers 4 are held between the disks for the final assembly in the hammer mill rotor shown in FIGS. 1 and 2 and their axes 11 are in the bearing body 6 from the front side of the 3 and 4, the impact bar 5 is inserted into the edge cutouts 12 from the outside and is pressed by wedges 13 and pressure elements 14 against the bearing body 7 serving for support.
  • the impact mill rotor shown in FIGS. 1 and 2 In the impact mill rotor shown in FIGS.
  • 5 to 8 illustrate that rotors of different widths can be produced from rotor disks of different hub widths, so that very narrowly differentiated offers are possible with low inventory.
  • only two rotor disks 1 can also be provided, if appropriate with the interposition of a hub-like ring 3 ', whereby in a modification of the invention, axially parallel support beams 15 are welded to the disk edges 1' of the rotor disks.
  • the support beams are only attached after the rotor-hub body has been welded together, so that all-round welding, also automated, is also possible in this embodiment provided for rotors of smaller impact mills.
  • the rotor disks 1 are provided with bores 17 on the end faces of their hubs 3 in order to enlarge the weld seams 9. They leave annular ribs 18, the end faces of which abut the adjacent rotor disks. After the welding process, the weld grooves 16 are filled with the welding material forming the weld seams 9.
  • the rotor disks 1 are aligned with the ring ribs 18 one on top of the other and in the circumferential direction.
  • the centering is carried out with the aid of ring disks 20, 21 which are inserted into cylindrical recesses 22 of the hubs 3, and a tube 23 onto which the rotor disks 1 with the ring disks 20, 21 are pushed and on which they are aligned with one another by rotating in the circumferential direction , so that the edge cutouts 12 provided on the rotor disks are aligned with one another.
  • the tube 23 is brought into a rotationally fixed connection with the outer rotor disks 1 by means of drivers 24.
  • the rotor disks 1 are provisionally connected to one another by welding spots 25 which are basically attached to the weld groove 16. If necessary, after the provisional connection of the rotor disks 1 through the welding spots 25 and after removing the tube 23 and the ring disks 20, 21 (the inner ring disks 21 having to be destroyed), ring weld seams 26 on the inner butt welds of the hubs 3 inside the ring ribs 18 can also be made be attached. The tube 23 can be pushed back into the two outer ring disks 20 after reinserting them. This situation is shown in Fig. 11. The washers 21 are only shown in dashed lines here because they have already been removed at this stage of assembly.
  • ring disks 21 are chosen so wide for centering and alignment in the circumferential direction that they engage in the recesses of two adjacent ring disks.
  • the rotor disks are provisionally connected from the inside in the area of the edge cutouts provided for this purpose in the ring disks by welding spots.
  • the aforementioned Ring welds 26 attached to the inner butt welds of the hubs 3. Only then is the tube 23 inserted into the outer ring disks that have been used in the meantime.
  • the interconnected rotor disks 1 are then pivoted into a horizontal axial position and applied to a welding system which has a frame 27 which is provided with two pairs of rollers 28, on which the tube 23 projects with its over the rotor disks 1 Hang up ends.
  • the roller pairs can be driven.
  • a cantilever 29 attached to the frame 27 and on which welding devices 30 are arranged extends over the unit on the frame 27 from the rotor disks 1 which are temporarily connected to one another.
  • the unit consisting of the rotor disks 1 is slowly rotated, welding layers 16, starting from the base thereof, being placed one above the other in several or many turns until the weld grooves 16 are filled with welding material, the welding devices 30 being raised accordingly will.
  • the tube 23 and the washers 20 and 21 are removed from the finished rotor body thus produced and this is provided with a shaft and the other parts, such as with the blow bars.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
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  • Joining Of Building Structures In Genera (AREA)

Abstract

The invention relates to a rotor 1a for impact or hammer mills whose rotor discs 1 are manufactured from casting steel and have widened hubs 3 which, according to the invention, are welded to one another at their end faces. Before the welding process, the rotor discs are joined in a centred fashion. The outer edges of the rotor discs remain - at least initially - unconnected to one another, i.e. they have an all round spacing from one another, as a result of hollowed-out portions 17 on the hubs 3 to form welding seam groove 16 so that the hubs can be preferably automatically welded to one another by means of the annular weld seams 9 which fill out the welding seam grooves. <IMAGE>

Description

Die Erfindung betrifft einen Rotor für Prall- oder Hammermühlen, der aus mehreren miteinander verschweißten Rotorscheiben aus Stahlguß besteht, die verbreiterte, einander berührende Naben aufweisen.The invention relates to a rotor for impact or hammer mills, which consists of several welded rotor disks made of cast steel, which have widened, touching hubs.

Bei den bekannten Rotoren dieser Art hat man die Rotorscheiben in ihrem äußeren Bereich miteinander verschweißt (DE-GmS 18 31 058, DE-GmS 66 01 200), um eine ausreichende Steifheit des Rotorkörpers zu erzielen. Bei Hammermühlen stehen dazu aber nur kleine Bereiche zwischen den von den Schlaghämmern beanspruchten Räumen zur Verfügung, die Schweißnähte sind also unterbrochen. Das trifft auch auf auf diese Weise zusammengeschweißte Prallmühlenrotoren zu, deren Schweißnähte aber lang und aufwendig sind. Die Herstellung solcher Rotore ist entsprechend teuer. Außerdem sind die Außenbereiche der Rotoren sehr stark dem Verschleiß ausgesetzt, so daß dort angelegte Schweißnähte auch beeinträchtigt werden.In the known rotors of this type, the rotor disks have been welded to one another in their outer region (DE-GmS 18 31 058, DE-GmS 66 01 200) in order to achieve sufficient rigidity of the rotor body. In hammer mills, however, only small areas are available between the spaces occupied by the impact hammers, so the weld seams are interrupted. This also applies to impact mill rotors welded together in this way, but the weld seams of which are long and complex. The manufacture of such rotors is correspondingly expensive. In addition, the outer areas of the rotors are very exposed to wear, so that welds created there are also affected.

Der Erfindung liegt die Aufgabe zugrunde, aus mehreren Rotorscheiben durch Schweißen zusammengesetzte Rotoren in sicherer und kostensparender Weise miteinander zu verschweissen. Das geschieht dadurch, daß die Rotorscheiben durch Ringschweißnähte an den Stirnflächen ihrer Naben miteinander verschweißt sind.The invention has for its object from several Welding rotor disks assembled by welding in a safe and cost-saving manner. This is done in that the rotor disks are welded together by ring welds on the end faces of their hubs.

Besonders günstig wirkt sich bei der Herstellung dieser Ringschweißnähte aus, wenn man dafür sorgt, daß die Rotorscheiben, wenn sie mit ihren Naben aneinanderliegen, in den äußeren Zonen durchweg einen gewissen Abstand voneinander haben, damit das verwendete Schweißgerät ringsum bis an die Naben heranreichen kann. Dann ergibt sich nämlich ein sehr einfaches und schnelles Verschweißen der Rotorscheiben, wenn diese zueinander zentriert und provisorisch miteinander verspannt oder sonstwie verbunden langsam um ihre gemeinsame Achse gedreht werden. Die Ringschweißnähte können dann alle gleichzeitig durch feststehende Schweißgeräte hergestellt werden, die zwischen den Rotorscheiben bis an die Naben reichen. Dagegen kann man die bei den bekannten geschweißten Rotoren erforderlichen Schweißnähte nur mittels handgeführter Geräte herstellen.A particularly favorable effect in the production of these ring weld seams is to ensure that the rotor disks, when they rest against each other with their hubs, have a certain distance from one another in the outer zones, so that the welding machine used can reach all the way up to the hubs. This results in a very simple and quick welding of the rotor disks when they are centered and provisionally clamped to one another or rotated slowly or otherwise connected around their common axis. The ring weld seams can then all be produced at the same time by means of fixed welding devices that reach between the rotor disks and the hubs. In contrast, the welds required in the known welded rotors can only be produced by means of hand-held devices.

Es ist zwar ein Rotor bekannt (DE-PS 33 17 070), bei dem ringförmige Rotorscheiben mit ihrem Innenrand auf eine als Achse dienende Trommel aufgeschweißt sind. Hier müssen für jede Ringscheibe zwei Schweißnähte hergestellt werden, während bei der erfindungsgemäßen Gestaltung des Rotors jede Ringschweißnaht zwei benachbarte Rotorscheiben miteinander verbindet. Dabei entsteht ein stabiler Rotorkörper, der z.B. nicht über seine ganze Länge auf einer Welle geführt werden braucht, sondern nur an seinen beiden Enden auf der Welle gelagert werden kann, so daß eine genauere Ausdrehung der Rotorscheiben nur teilweise an den beiden Endscheiben notwendig ist.A rotor is known (DE-PS 33 17 070), in which annular rotor disks are welded with their inner edge onto a drum serving as an axis. Here, two weld seams have to be produced for each ring disk, while in the inventive design of the rotor, each ring weld seam connects two adjacent rotor disks to one another. This creates a stable rotor body which, for example, does not need to be guided on a shaft over its entire length, but can only be supported on the shaft at both ends, so that a more precise turning of the rotor disks is only partially necessary on the two end disks.

Bei Rotoren für Prallmühlen, die aus mehreren mit Abstand voneinander angeordneten Rotorscheiben zusammengesetzt sind, hat man zur Stützung der in Randausschnitte der Rotorscheiben eingesetzten Schlagleisten im allgemeinen auf der in Umlaufrichtung hinteren Seite der Randausschnitte sich über die ganze Rotorbreite erstreckende Stützbalken vorgesehen (DE-PS 12 57 541).In the case of rotors for impact mills, which are composed of a plurality of rotor disks which are arranged at a distance from one another, support bars which extend over the entire rotor width in the circumferential direction of the rotor cutouts have been provided to support the blow bars used in the peripheral cutouts of the rotor disks (DE-PS 12 57 541).

Damit die Schlagleisten trotz der für die Herstellung der Ringschweißnähte erforderlichen Abstände zwischen den Rotorscheiben eine gute Abstützung erhalten und zusätzliche Stützbalken nicht erforderlich werden, weisen gemäß einer weiteren Ausgestaltung der Erfindung die Rotorscheiben einen verbreiterten Außenkranz auf, der im Vergleich zu der Nabe beiderseits um die Hälfte dessen schmaler ist, was als Abstand zwischen benachbarten Außenkränzen für das Hindurchführen einer Schweißzange bzw. eines Schweißgerätes zu den Naben erforderlich ist.So that the blow bars receive good support despite the distances between the rotor disks required for the production of the ring weld seams and additional support beams are not required, according to a further embodiment of the invention the rotor disks have a widened outer ring which is half that of the hub on both sides compared to the hub whose narrower is what is required as the distance between adjacent outer rims for the passage of a welding gun or a welding device to the hubs.

Dieser Abstand ist verhältnismäßig gering (etwa 50 mm), so daß eine ausreichende Stützung der Schlagleisten gegeben ist und außer den Ringschweißnähten keine Schweißarbeiten ausgeführt werden müssen. Der Rotor besteht also bei dieser bevorzugten Ausführung ausschließlich aus den in Stahlguß hergestellten Rotorscheiben und ist infolgedessen sehr billig in der Herstellung.This distance is relatively small (about 50 mm), so that there is sufficient support for the blow bars and, apart from the ring welds, no welding work has to be carried out. In this preferred embodiment, the rotor therefore consists exclusively of the rotor disks produced in cast steel and is consequently very cheap to manufacture.

Diese Tatsache ermöglicht es auch, auf einfache Weise die Rotorbreite und damit die Rotorleistung zu variieren. Sieht man für die Herstellung der Rotoren beispielsweise nur zwei Rotorscheiben verschiedener Nabenbreite vor, so lassen sich durch unterschiedliche Kombination solcher Rotorscheiben Rotoren mit voneinander abweichender Breite herstellen, ohne daß dies zusätzliche Kosten verursacht.This fact also makes it possible to vary the rotor width and thus the rotor power in a simple manner. If, for example, only two rotor disks of different hub widths are provided for the manufacture of the rotors, rotors with differing widths can be produced by different combinations of such rotor disks, without this causing additional costs.

Bei kleineren Prallmühlen kann es jedoch aus baulichen Gründen zweckmäßig sein, auf den mit Ringschweißnähten verbundenen Rotorscheiben, wie an sich bekannt, durchgehende achsparallele Stützbalken für die Schlagleisten vorzusehen, die erst nach der Verbindung der Naben und gegebenenfalls eines zwischengelegten nabenähnlichen Ringes außen an den Scheibenrändern angeschweißt worden sind.In the case of smaller impact mills, however, it may be advisable for structural reasons to provide continuous, axially parallel support bars for the blow bars on the rotor disks connected with welded seams, as is known per se, which are welded to the outside of the disk edges only after the connection of the hubs and, if appropriate, an interposed hub-like ring have been.

Erfindungsgemäß ist vorgesehen, die Teile, die den verbreiterten Außenkranz der Rotorscheiben bilden, vor dem Verschweißen der Naben zwecks Schaffung planer Anlageflächen für die Schlagleisten zu bearbeiten bzw. vorzubearbeiten. Da die Rotorscheiben mit ihren Naben nur einfache Bauteile sind und auch die Zentrierung der Rotorscheiben zueinander sehr genau vorgenommen werden kann, erübrigt sich dadurch das sehr aufwendige Bearbeiten eines fertigen Rotors über die gesamte Breite. Nur in Ausnahmefällen kann eine Nachbearbeitung erforderlich werden.According to the invention, the parts that form the widened outer ring of the rotor disks are machined or pre-processed before welding the hubs in order to create flat contact surfaces for the blow bars. Since the rotor disks with their hubs are only simple components and the centering of the rotor disks with respect to one another can be carried out very precisely, this eliminates the very complex machining of a finished rotor over the entire width. Post-processing may only be necessary in exceptional cases.

Was die die Rotorscheiben miteinander verbindenden Schweißnähte anbetrifft, so können an den Außenkanten der Stirnflächen der Naben vorgesehene Schweißraupen, insbesondere bei großen Rotoren, wie sie bei Primärbrechern verwendet werden, im Hinblick auf die im Betrieb solcher Brecher auftretenden Schlag- und Stoßbeanspruchungen nicht die notwendige Festigkeit aufweisen.As far as the welds connecting the rotor disks to one another, weld beads provided on the outer edges of the end faces of the hubs, in particular in the case of large rotors, such as are used in primary crushers, cannot provide the necessary strength with regard to the impact and impact stresses occurring during the operation of such crushers exhibit.

Deshalb kann es vorteilhaft und gegebenenfalls notwendig sein, daß die für die Schweißnähte an den Stirnflächen der Naben vorgesehenen Ausdrehungen sich von den Außenkanten über einen beträchtlichen Teil der radialen Dicke der Naben erstrecken und mit Schweißmaterial ausgefüllt werden.Therefore, it may be advantageous and possibly necessary that the recesses provided for the weld seams on the end faces of the hubs extend from the outer edges over a considerable part of the radial thickness of the hubs and are filled with welding material.

Das Herstellen der unter Umständen eine beträchtliche Dicke aufweisenden Schweißnähte kann auf verschiedene Weise erfolgen. Am vorteilhaftesten geschieht dies dadurch, daß die Schweißnähte aus mehreren übereinandergelegten Lagen gebildet werden. Dazu werden die zueinander zentrierten, in Umfangsrichtung zueinander ausgerichteten und miteinander verspannten Rotorscheiben in waagerechter Achslage unter den feststehenden und bis an die Naben heranreichenden oder zwischen die vorerwähnten Ausdrehungen reichenden Schweißgeräten mehrmals langsam gedreht, so daß sich, im Grunde der durch je zwei Ausdrehungen gebildeten Nuten beginnend, eine Schweißnaht über die andere legt, bis die Nuten mit Schweißmaterial ausgefüllt sind. Dies kann, wie schon erwähnt, bei Vorhandensein einer der Zahl der Nuten entsprechenden Anzahl von Schweißgeräten bei allen Nuten eines Rotors gleichzeitig geschehen. Sind die Schweißgeräte mit einer automatischen Schweißdrahtzuführung versehen und werden sie nach jeder Rotorumdrehung automatisch um ein der Dicke der Schweißlagen entsprechendes Stück zurückgestellt, so können die Schweißnähte mit einem Minimum an Arbeitskräften und Zeitaufwand hergestellt werden, obwohl die Zahl der Lagen bei großen Rotoren 50 und mehr und die Länge der in den einzelnen Nuten dabei entstehenden Schweißnähte etwa 100 Meter betragen kann.The fabrication may be of considerable thickness welding seams can be done in different ways. The most advantageous way of doing this is to form the weld seams from a plurality of layers laid one on top of the other. For this purpose, the rotor disks, which are centered, aligned in the circumferential direction and braced to one another, are rotated slowly and repeatedly in the horizontal axis position under the fixed welding machines reaching up to the hubs or between the aforementioned turns so that, basically, the grooves formed by two turns each starting with one weld over the other until the grooves are filled with welding material. As already mentioned, this can take place simultaneously in the presence of a number of welding devices corresponding to the number of slots in all slots of a rotor. If the welding machines are equipped with an automatic welding wire feeder and they are automatically reset by a distance corresponding to the thickness of the welding layers after each rotor revolution, the welding seams can be produced with a minimum of manpower and time, although the number of layers for large rotors is 50 or more and the length of the weld seams created in the individual grooves can be approximately 100 meters.

Die Tiefe der Nuten muß selbstverständlich so gewählt werden, daß noch ringförmige Rippen mit entsprechenden Stirnflächen an den Naben verbleiben, mit denen sich die benachbarten Naben beim Zusammenspannen der Rotorscheiben aneinanderlegen.The depth of the grooves must of course be selected so that annular ribs with corresponding end faces remain on the hubs with which the adjacent hubs lie against one another when the rotor disks are clamped together.

Diese Rippen können beim Schweißvorgang gegebenenfalls wegschmelzen, so daß die Naben, wenn die Rippen nahe der Innenkanten der Stirnflächen vorgesehen sind, dann unter Umständen über die gesamte Stirnfläche miteinander verschweißt sind.These ribs may melt away during the welding process, so that the hubs, if the ribs are provided near the inner edges of the end faces, may then be welded together over the entire end face.

Die Rotorscheiben müssen beim Zusammenspannen selbstverständlich genau zueinander zentriert, aber auch in Umfangsrichtung zueinander ausgerichtet werden, damit die in den Rotorscheiben vorgesehenen Randausschnitte genau miteinander fluchten. Da das Zusammenspannen nach Aufeinanderlegen der Rotorscheiben in waagerechter Lage erfolgt, das Verschweißen aber bei lotrechter Anordnung der Rotorscheiben, also bei waagerechter Rotorachse, vorgenommen werden muß, müssen die zusammengespannten Rotorscheiben aus der einen in die andere Lage bewegt werden. Da ein axiales Zusammenspannen der Rotorscheiben Verschiebungen der Rotorscheiben zueinander hierbei nicht mit Sicherheit verhindern kann, werden die an den Stirnflächen der Naben mit den für die Schweißnähte vorgesehenen Ausdrehungen versehenen Rotorscheiben den in den Ansprüchen 9 und 10 angegebenen Arbeitsgängen unterzogen.The rotor disks must, of course, be centered exactly with respect to one another, but also aligned with one another in the circumferential direction, so that the edge cutouts provided in the rotor disks are exactly aligned with one another. Since the clamping of the rotor disks takes place in a horizontal position, but the welding must be carried out with the rotor disks arranged vertically, i.e. with the rotor axis horizontal, the clamped rotor disks must be moved from one position to the other. Since axial clamping of the rotor disks cannot reliably prevent displacements of the rotor disks relative to one another, the rotor disks provided on the end faces of the hubs with the recesses provided for the weld seams are subjected to the operations specified in claims 9 and 10.

Das gegenseitige Zentrieren der Rotorscheiben unter Zuhilfenahme von Ringscheiben kann in verschiedener Weise geschehen. So können in alle zylindrischen Ausdrehungen der Naben Ringscheiben eingesetzt und die mit den Ringscheiben versehenen Rotorscheiben auf ein Rohr aufgeschoben werden, das später auch zum Tragen der aus den provisorisch miteinander verbundenen Rotorscheiben bestehenden Einheit dient.The centering of the rotor disks with the aid of ring disks can be done in different ways. Thus, ring disks can be inserted into all cylindrical bores of the hubs and the rotor disks provided with the ring disks can be pushed onto a tube which later also serves to carry the unit consisting of the rotor disks which are temporarily connected to one another.

Die zylindrischen Ausdrehungen können aber auch so schmal und die Ringscheiben so breit gewählt werden, daß sie in die Ausdrehungen zweier benachbarter Rotorscheiben eingreifen und diese somit unmittelbar zueinander zentrieren. Die Rotorscheiben werden dabei jeweils unter Zwischenlage einer Ringscheibe aufeinandergelegt und dann durch Drehen um die Ringscheiben in Umfangsrichtung zueinander ausgerichtet.The cylindrical bores can also be chosen so narrow and the washers so wide that they engage in the bores of two adjacent rotor disks and thus center them directly with one another. The rotor disks are placed one on top of the other with the interposition of an annular disk and then aligned with one another in the circumferential direction by rotating around the annular disks.

Es kann vorteilhaft sein, wenn die Naben der Rotorscheiben nicht nur von außen, sondern auch von innen mit einer allerdings nur einfachen bzw. aus nur wenigen Lagen bestehenden Ringschweißnaht miteinander verbunden werden. Man versieht dazu die Naben zusätzlich zu den zylindrischen Ausdrehungen noch mit kleinen Ausdrehungen, die innerhalb der ringförmigen Rippen vorzusehen sind.It can be advantageous if the hubs of the rotor disks not only from the outside but also from the inside with one however, only simple ring welds or those consisting of only a few layers are connected to one another. In addition to the cylindrical bores, the hubs are also provided with small bores which are to be provided within the annular ribs.

Zur Anlegung dieser Schweißnaht entfernt man nach dem provisorischen Verbinden der Rotorscheiben durch die im Grunde der Schweißnahtnuten angebrachten Schweißpunkte gemäß dem Arbeitsgang c) die Ringscheiben, wobei die inneren Ringscheiben zerstört werden müssen, und legt die Ringschweißnähte von Hand an. Danach werden die beiden äußeren Ringscheiben, die vorzugsweise stärker gewählt werden als die inneren, wieder in die beiden äußeren Rotorscheiben eingesetzt. Dann folgen die Arbeitsgänge d) und e).In order to create this weld seam, after the provisional connection of the rotor disks, the annular disks are removed through the welding points attached to the bottom of the weld seam grooves in accordance with operation c), the inner annular disks having to be destroyed, and the annular weld seams are created by hand. Then the two outer ring disks, which are preferably chosen to be stronger than the inner ones, are reinserted into the two outer rotor disks. Then operations d) and e) follow.

Da die Masse der miteinander zu verbindenden Rotorscheiben groß ist und deshalb beim Schweißen ein starker Wärmeabfluß stattfindet, ist es vorteilhaft, vor dem provisorischen Miteinander-Verbinden die Rotorscheiben vorzuwärmen, z. Bsp. in einem Vorwärmofen und die miteinander verbundenen Rotorscheiben insgesamt vor dem Anlegen der endgültigen Schweißnähte auf eine erhöhte Temperatur von etwa 125 bis 250°C vorzuwärmen und diese Temperatur während des gesamten Schweißvorganges zu halten. Dies kann mit Hilfe von Flammrohren geschehen.Since the mass of the rotor disks to be connected to one another is large and therefore a strong heat dissipation takes place during welding, it is advantageous to preheat the rotor disks before temporarily connecting them together, e.g. For example, preheat in a preheating furnace and the interconnected rotor disks to an elevated temperature of about 125 to 250 ° C before applying the final weld seams and maintain this temperature during the entire welding process. This can be done with the help of flame tubes.

In der Zeichnung ist die Erfindung veranschaulicht, und zwar zeigen:

Fig. 1 u. 2
einen Rotor einer Hammermühle gemäß der Erfindung im Quer- und Längsschnitt,
Fig. 3 u. 4
einen Rotor einer Prallmühle gemäß der Erfindung im Quer- und Längsschnitt,
Fig. 5 bis 8
verschieden breite Prallmühlenrotoren in schematischer Darstellung in kleinerem Maßstab,
Fig. 9 u. 10
einen Rotor für eine kleinere Prallmühle gemäß der Erfindung im Quer- und Längsschnitt und
Fig. 11
einen Rotor gemäß Fig. 4 mit einer anderen Vorschweißung und den Mitteln zur Zentrierung und Ausrichtung der Rotorscheiben zueinander auf dem Gestell einer Schweißanlage.
The invention is illustrated in the drawing, in which:
Fig. 1 u. 2nd
a rotor of a hammer mill according to the invention in cross and longitudinal section,
Fig. 3 u. 4th
a rotor of an impact mill according to the invention in cross and longitudinal section,
5 to 8
impact mill rotors of different widths in a schematic representation on a smaller scale,
Fig. 9 u. 10th
a rotor for a smaller impact mill according to the invention in cross and longitudinal section and
Fig. 11
a rotor according to FIG. 4 with a different pre-welding and the means for centering and aligning the rotor disks to one another on the frame of a welding system.

Die dargestellten Rotoren bestehen je aus mehreren in Stahlguß hergestellten Rotorscheiben 1, die mit einer mittleren zylindrischen öffnung 2 und einer diese umgebenden breiteren Nabe 3 versehen sind. Am äußeren Rand haben sie je nach der Art der an ihnen vorgesehenen Zerkleinerungswerkzeuge (Schlaghämmer 4, Schlagleisten 5) breitere Lagerkörper 6 bzw. 7. Diese sind in den Fällen Fig. 1-8 so ausgebildet, daß zwischen den Lagerkörpern benachbarter Rotorscheiben 1 ein Spalt 8 verbleibt.The rotors shown each consist of several rotor disks 1 made of cast steel, which are provided with a central cylindrical opening 2 and a wider hub 3 surrounding them. On the outer edge, depending on the type of crushing tools provided on them (impact hammers 4, blow bars 5), they have wider bearing bodies 6 and 7, respectively. In the cases shown in FIGS. 1-8, they are designed such that a gap between the bearing bodies of adjacent rotor disks 1 8 remains.

Die Naben 3 benachbarter Rotorscheiben 1 sind an ihren äußeren Kanten durch Ringschweißnähte 9 fest miteinander verbunden. Zur Herstellung dieser Ringschweißnähte werden die an den Naben 3 durch Paßstifte 10 gegeneinander zentrierten und miteinander verspannten Rotorscheiben langsam gedreht, wobei feststehende und durch die Spalte 8 bis an die Naben heranreichende Schweißgeräte die Schweißnaht erzeugen.The hubs 3 of adjacent rotor disks 1 are firmly connected to one another at their outer edges by ring weld seams 9. To produce these ring weld seams, the rotor disks centered on the hubs 3 by means of dowel pins 10 and braced against one another are slowly rotated, fixed welding devices which reach the hubs through the gaps 8 producing the weld seam.

Nach Herstellung der Schweißnähte werden zur Endmontage bei dem in Fig. 1 und 2 dargestellten Hammermühlenrotor die Schlaghämmer 4 zwischen die Scheiben gehalten und ihre Achsen 11 werden in die Lagerkörper 6 von der Stirnseite des Rotors her in die durchgehenden Aufnahmebohrungen eingeschoben, während bei dem in Fig. 3 und 4 dargestellten Prallmühlenrotor die Schlagleiste 5 in die Randausschnitte 12 von außen eingesetzt und durch Keile 13 und Druckelemente 14 gegen die der Abstützung dienenden Lagerkörper 7 gedrückt werden.After the production of the weld seams, the impact hammers 4 are held between the disks for the final assembly in the hammer mill rotor shown in FIGS. 1 and 2 and their axes 11 are in the bearing body 6 from the front side of the 3 and 4, the impact bar 5 is inserted into the edge cutouts 12 from the outside and is pressed by wedges 13 and pressure elements 14 against the bearing body 7 serving for support. In the impact mill rotor shown in FIGS.

Die Fig. 5 bis 8 veranschaulichen, daß man aus Rotorscheiben unterschiedlicher Nabenbreite Rotoren verschiedener Breite herstellen kann, so daß mit geringer Lagerhaltung sehr eng differenzierte Angebote möglich sind.5 to 8 illustrate that rotors of different widths can be produced from rotor disks of different hub widths, so that very narrowly differentiated offers are possible with low inventory.

Wie die Fig. 9 und 10 zeigen, können auch nur zwei Rotorscheiben 1 vorgesehen sein, gegebenenfalls unter Zwischenlage eines nabenähnlichen Ringes 3', wobei in Abwandlung der Erfindung an den Scheibenrändern 1' der Rotorscheiben 1 achsparallele Stützbalken 15 festgeschweißt sind. Dazu werden die Stützbalken erst nach vorhergehendem Zusammenschweißen des Rotor-Naben-Körpers angebracht, so daß auch bei dieser für Rotoren kleinerer Prallmühlen vorgesehenen Ausführung ein Rundumverschweißen, auch automatisiert, möglich ist.As shown in FIGS. 9 and 10, only two rotor disks 1 can also be provided, if appropriate with the interposition of a hub-like ring 3 ', whereby in a modification of the invention, axially parallel support beams 15 are welded to the disk edges 1' of the rotor disks. For this purpose, the support beams are only attached after the rotor-hub body has been welded together, so that all-round welding, also automated, is also possible in this embodiment provided for rotors of smaller impact mills.

Bei dem in Fig. 11 dargestellten Rotor sind zwecks Vergrößerung der Schweißnähte 9 die Rotorscheiben 1 an den Stirnflächen ihrer Naben 3 mit Ausdrehungen 17 versehen. Sie belassen ringförmige Rippen 18, mit deren Stirnflächen die benachbarten Rotorscheiben aneinanderliegen. Nach dem Schweißvorgang sind die Schweißnahtnuten 16 mit dem die Schweißnähte 9 bildenden Schweißmaterial ausgefüllt.In the rotor shown in FIG. 11, the rotor disks 1 are provided with bores 17 on the end faces of their hubs 3 in order to enlarge the weld seams 9. They leave annular ribs 18, the end faces of which abut the adjacent rotor disks. After the welding process, the weld grooves 16 are filled with the welding material forming the weld seams 9.

Die für das Miteinanderverschweißen der Rotorscheiben 1 benötigten Hilfsmittel werden im folgenden im Zusammenhang mit der Beschreibung der Arbeitsgänge benannt.The aids required for welding the rotor disks 1 together are named below in connection with the description of the operations.

Die Rotorscheiben 1 werden mit den Ringrippen 18 aufeinanderliegend zentrisch und im Umfangssinne zueinander ausgerichtet. Das Zentrieren erfolgt mit Hilfe von Ringscheiben 20, 21, die in zylindrische Ausdrehungen 22 der Naben 3 eingesetzt werden, und eines Rohres 23, auf das die Rotorscheiben 1 mit den Ringscheiben 20, 21 aufgeschoben und auf dem sie durch Drehen in Umfangsrichtung zueinander ausgerichtet werden, so daß die an den Rotorscheiben vorgesehenen Randausschnitte 12 miteinander fluchten. Danach wird das Rohr 23 über Mitnehmer 24 mit den äußeren Rotorscheiben 1 in drehfeste Verbindung gebracht. In diesem Zustand werden die Rotorscheiben 1 durch im Grunde der Schweißnahtnuten 16 angebrachte SChweißpunkte 25 provisorisch miteinander verbunden. Gegebenenfalls können nach der provisorischen Verbindung der Rotorscheiben 1 durch die Schweißpunkte 25 und nach Herausnehmen des Rohres 23 und der Ringscheiben 20, 21 (wobei die inneren Ringscheiben 21 zerstört werden müssen) auch noch Ringschweißnähte 26 an den inneren Stoßnähten der Naben 3 innerhalb der Ringrippen 18 angebracht werden. Das Rohr 23 kann nach Wiedereinsetzen der beiden äußeren Ringscheiben 20 wieder in diese eingeschoben werden. Diese Situation ist in Fig. 11 dargestellt. Die Ringscheiben 21 sind hier nur gestrichelt gezeichnet, weil sie in diesem Montagestadium an sich schon entfernt worden sind.The rotor disks 1 are aligned with the ring ribs 18 one on top of the other and in the circumferential direction. The centering is carried out with the aid of ring disks 20, 21 which are inserted into cylindrical recesses 22 of the hubs 3, and a tube 23 onto which the rotor disks 1 with the ring disks 20, 21 are pushed and on which they are aligned with one another by rotating in the circumferential direction , so that the edge cutouts 12 provided on the rotor disks are aligned with one another. Thereafter, the tube 23 is brought into a rotationally fixed connection with the outer rotor disks 1 by means of drivers 24. In this state, the rotor disks 1 are provisionally connected to one another by welding spots 25 which are basically attached to the weld groove 16. If necessary, after the provisional connection of the rotor disks 1 through the welding spots 25 and after removing the tube 23 and the ring disks 20, 21 (the inner ring disks 21 having to be destroyed), ring weld seams 26 on the inner butt welds of the hubs 3 inside the ring ribs 18 can also be made be attached. The tube 23 can be pushed back into the two outer ring disks 20 after reinserting them. This situation is shown in Fig. 11. The washers 21 are only shown in dashed lines here because they have already been removed at this stage of assembly.

Eine zweckmäßige Abwandlung dieser Arbeitsgänge ergibt sich, wenn zur Zentrierung und Ausrichtung in Umfangsrichtung die Ringscheiben 21 so breit gewählt werden, daß sie in die Ausdrehungen zweier benachbarter Ringscheiben eingreifen. Nach so erfolger Zentrierung und durchgeführter Ausrichtung in Umfangsrichtung werden die Rotorscheiben von innen im Bereich hierfür vorgesehener Randausschnitte in den Ringscheiben provisorisch durch Schweißpunkte verbunden. Nach Entfernung der Ringscheiben 21 werden die vorerwähnten Ringschweißnähte 26 an den inneren Stoßnähten der Naben 3 angebracht. Erst danach wird das Rohr 23 in die zwischenzeitlich eingesetzten äußeren Ringscheiben eingeschoben.An expedient modification of these operations results if the ring disks 21 are chosen so wide for centering and alignment in the circumferential direction that they engage in the recesses of two adjacent ring disks. After successful centering and alignment in the circumferential direction, the rotor disks are provisionally connected from the inside in the area of the edge cutouts provided for this purpose in the ring disks by welding spots. After removal of the washers 21, the aforementioned Ring welds 26 attached to the inner butt welds of the hubs 3. Only then is the tube 23 inserted into the outer ring disks that have been used in the meantime.

Zusammen mit dem Rohr 23 werden dann die miteinander verbundenen Rotorscheiben 1 in eine waagerechte Axiallage geschwenkt und auf eine Schweißanlage aufgebracht, die ein Gestell 27 aufweist, das mit zwei Rollenpaaren 28 versehen ist, auf die sich das Rohr 23 mit seinen über die Rotorscheiben 1 überstehenden Enden auflegt. Die Rollenpaare sind antreibbar. Über die auf dem Gestell 27 befindliche Einheit aus den provisorisch miteinander verbundenen Rotorscheiben 1 erstreckt sich ein an dem Gestell 27 befestigter Ausleger 29 an dem Schweißgeräte 30 angeordnet sind. Sie bestehen in bekannter Weise je aus einem Zuführrohr für den Schweißdraht, einem Zuführrohr für das Schweißpulver und einem Absaugrohr für überschüssiges Pulver, erstrecken sich durch die zwischen den Außenkränzen 7 benachbarter Rotorscheiben 1 vorhandenen Ringspalte 8 hindurch bis an die zwischen den Naben 3 der Rotorscheiben 1 vorhandenen Schweißnahtnuten 16 und gegebenenfalls in diese hinein. Sie sind bezüglich ihrer Hineinragtiefe verstellbar.Together with the tube 23, the interconnected rotor disks 1 are then pivoted into a horizontal axial position and applied to a welding system which has a frame 27 which is provided with two pairs of rollers 28, on which the tube 23 projects with its over the rotor disks 1 Hang up ends. The roller pairs can be driven. A cantilever 29 attached to the frame 27 and on which welding devices 30 are arranged extends over the unit on the frame 27 from the rotor disks 1 which are temporarily connected to one another. They each consist in a known manner of a feed pipe for the welding wire, a feed pipe for the welding powder and a suction pipe for excess powder, extend through the annular gaps 8 present between the outer rims 7 of adjacent rotor disks 1 as far as those between the hubs 3 of the rotor disks 1 existing weld groove 16 and possibly into this. They are adjustable in terms of their depth.

Beim Schweißvorgang wird die aus den Rotorscheiben 1 bestehende Einheit langsam gedreht, wobei in die Schweißnahtnuten 16 von deren Grund ausgehend Schweißlagen in mehreren oder auch vielen Windungen übereinandergelegt werden, bis die Schweißnahtnuten 16 mit Schweißmaterial ausgefüllt sind, wobei die Schweißgeräte 30 nach und nach entsprechend angehoben werden.During the welding process, the unit consisting of the rotor disks 1 is slowly rotated, welding layers 16, starting from the base thereof, being placed one above the other in several or many turns until the weld grooves 16 are filled with welding material, the welding devices 30 being raised accordingly will.

Nach dem Schweißen werden das Rohr 23 und die Ringscheiben 20 und 21 aus dem so entstandenen fertigen Rotorkörper entfernt und dieser mit einer Welle und den übrigen Teilen, wie mit den Schlagleisten, versehen.After welding, the tube 23 and the washers 20 and 21 are removed from the finished rotor body thus produced and this is provided with a shaft and the other parts, such as with the blow bars.

Claims (11)

Rotor für Prall- oder Hammermühlen, der aus mehreren miteinander verschweißten Rotorscheiben aus Stahlguß besteht, die verbreiterte, einander berührende Naben aufweisen, dadurch gekennzeichnet, daß die Rotorscheiben (1) durch Ringschweißnähte (9) an ihren Naben (3) miteinander verschweißt sind.Rotor for impact or hammer mills, which consists of several welded rotor disks made of cast steel, which have widened, contacting hubs, characterized in that the rotor disks (1) are welded together by ring welds (9) on their hubs (3). Rotor nach Anspruch 1, dadurch gekennzeichnet, daß außerhalb der Naben (3) nur Rotorscheibenteile (6, 7) vorhanden sind, die mit entsprechenden Teilen benachbarter Rotorscheiben einen rundum freien Zwischenraum belassen, der breit genug für das Hindurchführen eines Schweißgerätes zu den Naben ist.Rotor according to claim 1, characterized in that outside the hubs (3) there are only rotor disk parts (6, 7) which, with corresponding parts of adjacent rotor disks, leave an all-round free space which is wide enough for a welding device to be passed to the hubs. Rotor nach Anspruch 1 für Prallmühlen, dadurch gekennzeichnet, daß die Rotorscheiben (1) einen verbreiterten Außenkranz (7) aufweisen, der im Vergleich zu der Nabe (3) beiderseits um die Hälfte dessen schmaler ist, was als Abstand zwischen benachbarten Außenkränzen für das Hindurchführen eines Schweißgerätes zu den Naben (3) erforderlich ist.Rotor according to claim 1 for impact mills, characterized in that the rotor disks (1) have a widened outer ring (7) which is narrower on both sides by half compared to the hub (3), which is the distance between adjacent outer rings for the Passing a welding machine to the hubs (3) is required. Rotor nach Anspruch 3, gekennzeichnet durch die Verwendung von Rotorscheiben (1) mit verschieden breiten Naben (3).Rotor according to claim 3, characterized by the use of rotor disks (1) with hubs (3) of different widths. Rotor nach Anspruch 1 für Prallmühlen, dadurch gekennzeichnet, daß die mit Ringschweißnähten (9) verbundenen Rotorscheiben (1) durchgehende, achsparallele Stützbalken (15) für Schlagleisten (5) aufweisen, die erst nach der Verbindung der Naben 3, 3') außen an den Scheibenrändern (1') angeschweißt worden sind.Rotor according to claim 1 for impact mills, characterized in that the rotor disks (1) connected with ring weld seams (9) have continuous, axially parallel support beams (15) for blow bars (5) which are only on the outside after the connection of the hubs 3, 3 ') the disc edges (1 ') have been welded. Rotor nach Anspruch 3, dadurch gekennzeichnet, daß die Teile, die den verbreiterten Außenkranz (7) der Rotorscheiben (1) bilden, vor dem Verschweißen der Naben (3) zwecks Schaffung planer Anlageflächen für die Schlagleisten (5) bearbeitet worden sind.Rotor according to Claim 3, characterized in that the parts which form the widened outer ring (7) of the rotor disks (1) have been machined before the hubs (3) are welded together in order to create flat contact surfaces for the blow bars (5). Rotor nach Anspruch 1, dadurch gekennzeichnet, daß die für die Schweißnähte (9) an den Stirnflächen der Naben (3) vorgesehenen Ausdrehungen (17) sich von den Außenkanten über einen beträchtlichen Teil der radialen Dicke der Naben erstrecken, und daß die durch die Ausdrehungen benachbarter Rotorscheiben gebildeten Schweißnahtnuten (16) mit Schweißmaterial ausgefüllt sind.Rotor according to claim 1, characterized in that the recesses (17) provided for the weld seams (9) on the end faces of the hubs (3) extend from the outer edges over a considerable part of the radial thickness of the hubs, and that through the recesses weld grooves (16) formed adjacent rotor disks are filled with welding material. Rotor nach Anspruch 1, dadurch gekennzeichnet, daß die Schweißnähte (9) aus mehreren übereinandergelegten Lagen des Schweißmaterials bestehen.Rotor according to claim 1, characterized in that the weld seams (9) consist of several superimposed layers of the welding material. Verfahren zum Herstellen eines Rotors nach Anspruch 1 oder 7, gekennzeichnet durch die folgenden Arbeitsgänge: a) Die Naben (3) der mit den Ausdrehungen (17) versehenen Rotorscheiben (1) werden an ihren axialen Enden von innen her mit paßgenauen zylindrischen Ausdrehungen (22) versehen; b) die Rotorscheiben (1) werden unter Zuhilfennahme von in die Ausdrehungen (22) passenden Ringscheiben (20, 21) und gegebenenfalls eines in die Ringscheiben eingeschobenen Rohres (23) zueinander zentriert aufeinandergelegt und durch Drehen um die Ringscheiben in Umfangsrichtung zueinander ausgerichtet; c) die Rotorscheiben (1) werden von außen her im Grunde der für die Schweißnähte (9) vorgesehenen, durch die Ausdrehungen (17) gebildeten Nuten (16) oder von innen her an durch Randausschnitte der Ringscheiben (21) zugänglichen Stellen durch Schweißpunkte (25) provisorisch miteinander verbunden; d) in die Ringscheiben (20, 21 ) wird, sofern nicht schon vorhanden, das Rohr (23) eingeschoben, das die aus den provisorisch miteinander verbundenen Rotorscheiben (1) bestehende Einheit an beiden Enden überragt; e) die aus den Rotorscheiben (1) bestehende Einheit wird mit den Enden des Rohres (23) auf zwei Rollenpaare (28) einer Schweißanlage (27-30) aufgelegt und mittels einer an dieser vorgesehenen Antriebsvorrichtung unter dem oder den zwischen den Rotorscheiben (1) bis an die Naben (3) heranreichenden bzw. in die Schweißnahtnuten (16) reichenden Schweißgeräten (30) langsam gedreht. Method for manufacturing a rotor according to claim 1 or 7, characterized by the following operations: a) The hubs (3) of the rotor disks (1) provided with the recesses (17) are provided at their axial ends from the inside with precisely fitting cylindrical recesses (22); b) the rotor disks (1) are placed one on top of the other with the aid of ring disks (20, 21) which fit into the recesses (22) and optionally a tube (23) inserted into the ring disks and aligned in the circumferential direction by rotating them around the ring disks; c) the rotor disks (1) are from the outside basically the slots (16) provided for the weld seams (9), formed by the recesses (17) or from the inside at points accessible by edge cutouts of the ring disks (21) by welding points ( 25) provisionally linked; d) in the ring disks (20, 21), if not already present, the tube (23) is inserted which protrudes at both ends from the unit consisting of the rotor disks (1) which are temporarily connected to each other; e) the unit consisting of the rotor disks (1) is placed with the ends of the tube (23) on two pairs of rollers (28) of a welding system (27-30) and by means of a drive device provided thereon under or between the rotor disks (1 ) slowly rotated up to the hubs (3) or into the weld groove (16) welding devices (30). Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß nach dem Arbeitsgang c) die Ringscheiben (20, 21) entfernt und von innen her Ringschweißnähte (26) an den Stoßstellen der benachbarten Naben (3) hergestellt und danach die beiden äußeren Ringscheiben (20) wieder eingesetzt werden.A method according to claim 9, characterized in that after operation c), the ring disks (20, 21) are removed and ring weld seams (26) are produced from the inside at the joints of the adjacent hubs (3) and the two outer ring disks (20) are then reinserted. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß die Rotorscheiben (1) vor dem provisorischen Verbinden durch die Schweißpunkte (25) in einem Vorwärmofen je nach Materialzusammensetzung der Rotorscheiben auf Temperaturen zwischen 125 und 250°C vorgewärmt werden und die aus den Rotorscheiben (1) bestehende Einheit vor dem Herstellen der Schweißnähte (9) mit Hilfe von Flammrohren oder dergleichen auf diese Temperatur erneut vorgewärmt, bzw. diese Temperatur während des Schweißvorganges aufrechterhalten wird.Method according to Claim 9, characterized in that the rotor disks (1) are preheated to temperatures between 125 and 250 ° C in a preheating furnace before the provisional connection by the welding spots (25), depending on the material composition of the rotor disks, and those from the rotor disks (1) Existing unit is preheated to this temperature using flame tubes or the like before the welding seams (9) are produced, or this temperature is maintained during the welding process.
EP91114578A 1991-08-22 1991-08-29 Rotor for impact crushers or hammer mills Expired - Lifetime EP0529135B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914127875 DE4127875C2 (en) 1991-01-30 1991-08-22 Impact or hammer mill rotor and method of making a rotor
DE4127875 1991-08-22

Publications (2)

Publication Number Publication Date
EP0529135A1 true EP0529135A1 (en) 1993-03-03
EP0529135B1 EP0529135B1 (en) 1996-10-23

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Family Applications (1)

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EP91114578A Expired - Lifetime EP0529135B1 (en) 1991-08-22 1991-08-29 Rotor for impact crushers or hammer mills

Country Status (9)

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EP (1) EP0529135B1 (en)
JP (1) JP3306105B2 (en)
AT (1) ATE144442T1 (en)
AU (1) AU641069B2 (en)
DE (1) DE59108305D1 (en)
ES (1) ES2095888T3 (en)
GR (1) GR3022377T3 (en)
MX (1) MX9204852A (en)
ZA (1) ZA925345B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI121754B (en) * 2009-07-14 2011-03-31 Allu Finland Oy Sifting, crushing or mixing bucket

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1831058U (en) 1961-03-07 1961-05-10 Hazemag Hartzerkleinerung Und CONVEYOR FOR HIGH SPEED IMPACT MILLS.
US3123702A (en) * 1964-03-03 Deep groove arc welding apparatus
DE1257541B (en) 1965-05-06 1967-12-28 Hazemag Hartzerkleinerung Blow bar for rotors of impact mills
DE6601200U (en) 1966-01-03 1969-02-27 Miag Gmbh BEAT ROTOR FOR BEAT MILLS
FR1589790A (en) * 1968-10-22 1970-04-06
FR2314996A1 (en) * 1975-06-19 1977-01-14 Bbc Brown Boveri & Cie METHOD AND DEVICE FOR MAKING A ROTOR SHAPED FROM AN ASSEMBLY OF WELDED DISCS
FR2356472A1 (en) * 1976-07-02 1978-01-27 Bbc Brown Boveri & Cie METHOD OF CONNECTING METAL ELEMENTS BY FUSION ARC WELDING
EP0019542A1 (en) * 1979-05-17 1980-11-26 APPAREILS DRAGON, Société Anonyme Impact mills with articulated hammers
DE3317070C1 (en) 1983-05-10 1984-07-26 Maschinenfabrik B.Maier GmbH & Co KG, 4800 Bielefeld Impact mill
DE8214553U1 (en) * 1982-05-18 1985-08-29 Gebr. Hofmann, 8700 Würzburg Rotor for hammer mills
DE3522643A1 (en) * 1985-06-25 1987-01-08 Kloeckner Wilhelmsburger Gmbh Method and apparatus for welding a connection piece to a container or to part of a container
EP0444432A1 (en) * 1990-03-01 1991-09-04 NOELL Service und Maschinentechnik GmbH Rotor for impact- or hammer-mill

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151816A (en) * 1962-06-18 1964-10-06 Pettibone Mulliken Corp Crusher apparatus and method of manufacture

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123702A (en) * 1964-03-03 Deep groove arc welding apparatus
DE1831058U (en) 1961-03-07 1961-05-10 Hazemag Hartzerkleinerung Und CONVEYOR FOR HIGH SPEED IMPACT MILLS.
DE1257541B (en) 1965-05-06 1967-12-28 Hazemag Hartzerkleinerung Blow bar for rotors of impact mills
DE6601200U (en) 1966-01-03 1969-02-27 Miag Gmbh BEAT ROTOR FOR BEAT MILLS
FR1589790A (en) * 1968-10-22 1970-04-06
FR2314996A1 (en) * 1975-06-19 1977-01-14 Bbc Brown Boveri & Cie METHOD AND DEVICE FOR MAKING A ROTOR SHAPED FROM AN ASSEMBLY OF WELDED DISCS
FR2356472A1 (en) * 1976-07-02 1978-01-27 Bbc Brown Boveri & Cie METHOD OF CONNECTING METAL ELEMENTS BY FUSION ARC WELDING
EP0019542A1 (en) * 1979-05-17 1980-11-26 APPAREILS DRAGON, Société Anonyme Impact mills with articulated hammers
DE8214553U1 (en) * 1982-05-18 1985-08-29 Gebr. Hofmann, 8700 Würzburg Rotor for hammer mills
DE3317070C1 (en) 1983-05-10 1984-07-26 Maschinenfabrik B.Maier GmbH & Co KG, 4800 Bielefeld Impact mill
DE3522643A1 (en) * 1985-06-25 1987-01-08 Kloeckner Wilhelmsburger Gmbh Method and apparatus for welding a connection piece to a container or to part of a container
EP0444432A1 (en) * 1990-03-01 1991-09-04 NOELL Service und Maschinentechnik GmbH Rotor for impact- or hammer-mill

Also Published As

Publication number Publication date
JPH05192598A (en) 1993-08-03
EP0529135B1 (en) 1996-10-23
GR3022377T3 (en) 1997-04-30
ATE144442T1 (en) 1996-11-15
ZA925345B (en) 1993-02-10
DE59108305D1 (en) 1996-11-28
JP3306105B2 (en) 2002-07-24
AU8996591A (en) 1993-02-25
ES2095888T3 (en) 1997-03-01
MX9204852A (en) 1993-04-01
AU641069B2 (en) 1993-09-09

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