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EP3865216B1 - Device for grinding metal chips - Google Patents

Device for grinding metal chips Download PDF

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Publication number
EP3865216B1
EP3865216B1 EP20157065.2A EP20157065A EP3865216B1 EP 3865216 B1 EP3865216 B1 EP 3865216B1 EP 20157065 A EP20157065 A EP 20157065A EP 3865216 B1 EP3865216 B1 EP 3865216B1
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EP
European Patent Office
Prior art keywords
endless conveyor
knife shaft
cutting
conveyor
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP20157065.2A
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German (de)
French (fr)
Other versions
EP3865216A1 (en
Inventor
Karl-Heinz Kilian
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Individual
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Individual
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Priority to EP20157065.2A priority Critical patent/EP3865216B1/en
Publication of EP3865216A1 publication Critical patent/EP3865216A1/en
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Publication of EP3865216B1 publication Critical patent/EP3865216B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/145—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with knives spaced axially and circumferentially on the periphery of a cylindrical rotor unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/22—Feed or discharge means
    • B02C18/2225—Feed means
    • B02C18/2241—Feed means of conveyor belt type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C2018/164—Prevention of jamming and/or overload

Definitions

  • the invention relates to a device for crushing metal chips.
  • metal shavings for example steel shavings
  • These metal chips are transported away from the lathe by means of an endless conveyor and conveyed into a container.
  • the volume of the metal shavings can be significantly reduced by means of a device for crushing metal shavings, so that these containers need to be emptied less frequently.
  • the shavings are regularly very sharp-edged, so that the shavings cannot be pressed together with bare hands to create more space in the container.
  • the risk of injury for employees would be too great.
  • there are devices for crushing known of metal chips which have one or more rotatable shafts, each equipped with cutting blades.
  • a corresponding device is, for example, from DE 44 06 675 A1 known.
  • Several disc-shaped cutting knives are pushed one behind the other onto the rotatable knife shaft and fastened to the knife shaft in this threaded sequence.
  • the individual cutting teeth of the cutting blades can become blunt or break off during operation, making it necessary to replace the cutting blades.
  • the blade shaft with all cutting blades must be removed from the housing so that the outer cutting blades can be removed from the blade shaft up to the cutting blade to be replaced.
  • the functional cutting blades removed must be reattached to the blade shaft, which must then be reinstalled in the housing.
  • Such a repair process is associated with a great deal of time and effort and is therefore economically unfavorable.
  • it is not possible to crush the chips during the repair process which can also lead to a production stop on the lathes.
  • devices for comminuting metal chips are known in which the rotatable cutter shafts are each equipped with several cutting blade modules that can be placed individually on the cutter shafts and are detachably attached to the cutter shaft in such a way that, viewed in the direction of rotation of the cutter shaft, at least two cutting modules are available.
  • Corresponding devices are, for example, from DE 20 2009 017 062 U1 known.
  • the metal chips can also become entangled on the endless conveyor. This can lead to the fact that the chips no longer fall from the endless conveyor into the device for crushing metal chips, but get stuck on the endless conveyor. This can cause the endless conveyor to become clogged, which can lead to a production stop. In such a case, the endless conveyor must be opened and the drawn-in chips must be removed before the endless conveyor can be operated again. Such maintenance work is time-consuming and therefore economically disadvantageous.
  • the metal shavings must also generally be removed manually, which entails an increased risk of injury from the sharp-edged metal shavings.
  • the invention is based on the object of specifying an improved device for comminuting metal chips, which enables operation with as little maintenance as possible.
  • the device according to the invention for comminuting metal chips has at least one rotatably mounted cutter shaft. At least two cutting modules can be detachably fastened to each cutter shaft, which interact with at least one fixed cutter bar and thereby cause the chips to be comminuted.
  • the cutting modules can each be placed individually on the blade shaft and releasably attached to the blade shaft in such a way that at least two cutting modules are present, viewed in the direction of rotation of the blade shaft.
  • the device can be positioned in such a way that the metal chips transported by an endless conveyor can be scraped off the endless conveyor by the cutting modules attached to the knife shaft.
  • the at least one knife shaft is arranged above the endless conveyor or approximately at the same height as the endless conveyor.
  • the metal chips can be scraped off particularly effectively.
  • shavings can no longer form between the endless conveyor and the housing of the endless conveyor, since the shavings are shredded by the cutter shaft in good time.
  • the endless conveyor can have a first conveying area that runs approximately horizontally. This first conveying area can be followed by a second conveying area that rises, resulting in a concave area of the endless conveyor.
  • the at least one knife shaft can be arranged in this concave area of the endless conveyor.
  • the metal chips tend to form clumps.
  • the metal shavings can easily get caught in this area and thus disrupt the regular transport flow. If the cutting modules already grip the endless conveyor at this point, this tangle formation can be effectively prevented, so that trouble-free operation of the endless conveyor and thus also the lathes is possible.
  • the endless conveyor in a second embodiment can have a first circulating conveyor belt and a second circulating conveyor belt, which are present one behind the other, so that the metal chips are transferred from the first circulating conveyor belt to the second circulating conveyor belt.
  • the metal chips can also increasingly form tangles. Therefore, the knife shaft can be arranged in this transition area, so that the cutting modules can act at this point. This effectively prevents the formation of tangles, so that trouble-free operation of the endless conveyor and thus also of the lathes is possible.
  • the at least one cutter shaft can be arranged in front of the endless conveyor, viewed in the transport direction of the endless conveyor.
  • the axis of the at least one knife shaft can be arranged approximately at the level of the reversal point of the endless conveyor. In this way, it is possible to prevent the metal chips from accumulating on the housing of the endless conveyor shortly before the end of the endless conveyor, which would result in a tangle being formed.
  • the modular way of fastening the individual cutting modules makes it possible to detach a defective cutting module individually from the knife shaft and replace it without affecting other neighboring cutting modules. It is also not necessary to remove the blade shaft from the housing. The replacement of the individual cutting modules is thus possible in an uncomplicated and rapid manner, so that the device only has a short downtime during maintenance.
  • the cutting modules can be fastened to the knife shaft via at least one screw connection.
  • the individual cutting modules can each be screwed to the blade shaft with at least two screws. This type of attachment is easy to implement and enables a firm and permanent attachment that can also withstand greater forces.
  • the individual cutting modules each have at least one cutting tooth which interacts with the fixed blade bar of the device in order to comminute the metal chips.
  • the cutting modules can be designed in such a way that there is only one individual cutting tooth per cutting module.
  • the cutting module could be made correspondingly larger and have several cutting teeth.
  • the rotatably mounted cutter shaft can have a plurality of pockets in its lateral surface, in each of which a cutting module can be positioned.
  • the individual cutting modules can also be easily positioned on the knife shaft, which can be particularly desirable for the initial assembly of the individual cutting modules.
  • the cutting modules can be inserted exactly into the pockets and have a precisely defined position in relation to neighboring cutting modules, so that an optimal cutting result can be achieved.
  • the cutting modules can still be installed and replaced quickly, so that only a short installation time is required both for the initial installation and for the replacement of one or more cutting modules.
  • the pockets can preferably be milled into the lateral surface.
  • the pockets can be attached in a structurally simple manner using a solid drill, so that the manufacturing costs can be reduced.
  • the cutting modules can have a circular base that can be inserted into the pockets of the cutterblock.
  • the circular cross-section of the pockets and the base of the cutting modules reduces wear and tear on the cutting modules and reduces deformation of the cutting modules and the screws that attach the cutting modules to the cutterhead. This also makes it easier to change the cutting modules, since the screws can be loosened more easily.
  • the rotatably mounted cutter shaft can preferably be configured in a cylindrical manner.
  • the cross section of the rotatably mounted cutter shaft would be circular—apart from the pockets present in the lateral surface.
  • the fixed male connector can also be of modular design.
  • the male connector can have multiple knife units that For example, can be attached to a common knife holder.
  • the individual modules of the fixed knife strip can also be easily replaced if one of the knife units is defective.
  • the attachment of the individual blade units can be done, for example, using one or more screws.
  • the device according to the invention can be purchased and set up together with a corresponding endless conveyor.
  • the knife shaft can preferably have a separate motor drive.
  • the endless conveyor and the knife shaft can each be driven separately via their own motor drives.
  • the knife shaft and the endless conveyor should be connected to one another in such a way that a predefined distance between the individual cutting modules and the conveyor belts of the endless conveyor is maintained.
  • the housing of the cutter shaft can preferably be firmly connected to the housing of the endless conveyor.
  • a first embodiment of the device 10 according to the invention for crushing metal chips 12 is shown schematically in 1 shown.
  • the device 10 has a knife shaft 20 which is rotatably mounted in a bearing block 22 .
  • the knife shaft 20 can be driven to rotate about the axis of rotation 24 by means of a motor drive (not shown).
  • the direction of rotation 26 runs counterclockwise in the present example.
  • the cutter shaft 20 has a circular cross section.
  • a cutting module 40 (see Figures 4 and 5 ) are inserted and fastened.
  • the cutting modules 40 have a circular base 42 whose diameter is adapted to the diameter of the pockets 32 .
  • Each cutting module 40 has a respective cutting tooth 44 which is arranged centrally on the base 42 .
  • the cutting modules 40 each have a bore 46 into which a screw 48 engages can, in order to fasten the cutting modules 40 to the knife shaft 20 by means of a screw connection.
  • the cutting modules 40 can be removed from the knife shaft 20 individually. After the fastening screw 48 has been loosened, the cutting module 40 to be replaced can be removed from the knife shaft 20 .
  • the knife shaft 20 itself does not have to be removed from the bearing block 22 for this purpose. Also, no further cutting modules 40 that are not to be exchanged have to be removed. The replacement of defective cutting modules 40 is thus quick and unproblematic and is therefore economically advantageous.
  • the cutting teeth 44 of the cutting modules 40 interact with a fixed cutter bar 50 in order to comminute the metal chips 12 .
  • the stationary knife strip 50 is fastened to a knife holder 54 by means of several screws 52 .
  • the knife holder 54 itself is attached to the bearing block 22 for the knife shaft 20.
  • the knife strip 50 has a modular structure and has several knife units 56.
  • the number of knife units 56 can correspond to the number of cutting modules 40 viewed in the longitudinal direction of the knife shaft 20.
  • the individual blade units 56 are each fastened to the blade holder 54 via one or more screws 52 . Due to the modular structure of the fixed blade strip 50, the individual blade units 56 can also be easily replaced in the event of a defect.
  • the device 10 also has an endless conveyor 60 for metal shavings 12.
  • the endless conveyor 60 is placed so close to the rotatably mounted blade shaft 20 that the individual cutting modules 40 can serve as scrapers for the metal shavings 12.
  • the endless conveyor 60 has a first conveying area 62 which runs approximately horizontally. This first conveying area 62 is followed by a second conveying area 64 which runs uphill.
  • a concave area 66 of the Endless conveyor 60 In this concave area 66 of the endless conveyor 60, the metal chips 12 increasingly form balls.
  • the cutter shaft 20 is therefore placed in this concave area 66 of the endless conveyor 60. In this way, tangle formation can be effectively prevented
  • FIG. 6 a second embodiment of the device 10.2 according to the invention for crushing metal chips 12 is shown schematically.
  • the device 10.2 has a knife shaft 20.2, which is rotatably mounted in a bearing block 22.2.
  • the blade shaft 20.2 can be driven to rotate about the axis of rotation 24 by means of a motor drive, not shown. In the present example, the direction of rotation is clockwise.
  • the knife shaft 20.2 essentially corresponds to the knife shaft 20 in the Figures 2 to 5 is shown.
  • the cutting teeth 44 of the cutting modules 40 of the cutter shaft 20.2 interact with a stationary cutter bar 50.2 in order to crush the metal chips 12.
  • the stationary knife strip 50.2 is fastened to a knife holder 54.2 by means of several screws.
  • the male connector 50.2 like the male connector 50, has a modular structure.
  • the device 10.2 also has an endless conveyor 60.2 for metal chips 12.
  • the endless conveyor 60.2 is arranged in a housing 70.
  • the drive shaft 72 of the endless conveyor 60.2 is rotatably mounted in the housing 70.
  • the endless conveyor 60.2 is placed on the one hand so close to the rotatably mounted blade shaft 20.2 that the individual cutting modules 40 can serve as scrapers for the metal chips 12.
  • the knife shaft 20.2 is arranged with its axis of rotation 24 at the same height as the drive shaft 72 of the endless conveyor and thus at the height of the reversal point of the endless conveyor 60.2. In this way, tangle formation can be effectively prevented.
  • both the knife shaft 20.2 and the endless conveyor 60.2 rotate clockwise. In principle, however, it would also be possible to rotate the knife shaft 20.2 counterclockwise.
  • an endless conveyor with several rotatably mounted cutter shafts for crushing the metal chips. It would thus be possible, for example, in the concave area relative to the start of the endless conveyor, to have a first rotatably mounted knife shaft 1 to foresee. In the end area of the endless conveyor, a further rotatably mounted knife shaft could also be used accordingly 6 be arranged.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Description

TECHNISCHES GEBIETTECHNICAL AREA

Die Erfindung betrifft eine Vorrichtung zum Zerkleinern von Metallspänen. Beim Betreiben von Drehmaschinen fallen regelmäßig große Mengen von Metallspänen an, beispielsweise von Stahlspänen. Diese Metallspäne werden mittels eines Endlosförderers von der Drehmaschine abtransportiert und in einen Container gefördert. Mittels einer Vorrichtung zum Zerkleinern von Metallspänen kann das Volumen der Metallspäne deutlich reduziert werden, so dass diese Container weniger häufig geleert werden müssen.The invention relates to a device for crushing metal chips. When operating lathes, large amounts of metal shavings, for example steel shavings, are regularly produced. These metal chips are transported away from the lathe by means of an endless conveyor and conveyed into a container. The volume of the metal shavings can be significantly reduced by means of a device for crushing metal shavings, so that these containers need to be emptied less frequently.

STAND DER TECHNIKSTATE OF THE ART

Insbesondere in der metallverarbeitenden Industrie fallen oft sehr lange, spiralförmige und scharfkantige Metallspäne an, die einen großen Platzbedarf aufweisen. Verheddern sich diese Späne miteinander, führt dies zur Bildung von Späneknäueln, die einen noch größeren Platzbedarf aufweisen können. Bei den Metallspänen handelt es sich um einen wiederverwertbaren Rohstoff, der zum Recycling in Containern gesammelt wird. Regelmäßig ist das vorhandene Container-Volumen längst erreicht, obwohl gewichtsmäßig der Container noch voller befüllt werden könnte. Daher ist es vorteilhaft, möglichst kleine Späne zu erhalten, um den Volumenbedarf der Späne zu reduzieren und so eine möglichst große Masse an Spänen in einem Container unterbringen zu können.In the metalworking industry in particular, very long, spiral-shaped and sharp-edged metal chips often occur, which require a large amount of space. If these chips become entangled with one another, this leads to the formation of chip balls, which can take up even more space. The metal shavings are a recyclable raw material that is collected in containers for recycling. The existing container volume has long since been reached, although the container could still be filled with more weight. It is therefore advantageous to obtain chips that are as small as possible in order to reduce the volume requirements of the chips and thus to be able to accommodate as large a mass of chips as possible in a container.

Die Späne sind regelmäßig sehr scharfkantig, so dass die Späne nicht mit bloßen Händen zusammengedrückt werden können, um mehr Platz im Container zu schaffen. Das Verletzungsrisiko für die Mitarbeiter wäre zu groß. Zu diesem Zweck sind Vorrichtungen zum Zerkleinern von Metallspänen bekannt, die eine oder mehrere rotierbare Wellen besitzen, die jeweils mit Schneidmessern bestückt sind. Eine entsprechende Vorrichtung ist beispielsweise aus der DE 44 06 675 A1 bekannt. Auf die rotierbare Messerwelle werden mehrere scheibenförmige Schneidmesser hintereinander aufgeschoben und in dieser aufgefädelten Reihenfolge an der Messerwelle befestigt.The shavings are regularly very sharp-edged, so that the shavings cannot be pressed together with bare hands to create more space in the container. The risk of injury for employees would be too great. For this purpose there are devices for crushing known of metal chips, which have one or more rotatable shafts, each equipped with cutting blades. A corresponding device is, for example, from DE 44 06 675 A1 known. Several disc-shaped cutting knives are pushed one behind the other onto the rotatable knife shaft and fastened to the knife shaft in this threaded sequence.

Die einzelnen Schneidzähne der Schneidmesser können im Betrieb stumpf werden oder abbrechen, was ein Auswechseln der Schneidmesser notwendig macht. In diesem Fall muss die Messerwelle mit allen Schneidmessern aus dem Gehäuse ausgebaut werden, so dass die äußeren Schneidmesser bis zu dem auszuwechselnden Schneidmesser von der Messerwelle entfernt werden können. Nach dem Auswechseln des defekten Schneidmessers durch ein neues Schneidmesser müssen die entfernten funktionsfähigen Schneidmesser wieder an der Messerwelle befestigt und diese anschließend wieder in dem Gehäuse eingebaut werden. Ein solcher Reparaturvorgang ist mit einem hohen Zeit- und Arbeitsaufwand verbunden und damit wirtschaftlich ungünstig. Darüber hinaus ist ein Zerkleinern der Späne während des Reparaturvorgangs nicht möglich, was gegebenenfalls auch einen Produktionsstopp der Drehmaschinen zu Folge haben kann.The individual cutting teeth of the cutting blades can become blunt or break off during operation, making it necessary to replace the cutting blades. In this case, the blade shaft with all cutting blades must be removed from the housing so that the outer cutting blades can be removed from the blade shaft up to the cutting blade to be replaced. After replacing the defective cutting blade with a new cutting blade, the functional cutting blades removed must be reattached to the blade shaft, which must then be reinstalled in the housing. Such a repair process is associated with a great deal of time and effort and is therefore economically unfavorable. In addition, it is not possible to crush the chips during the repair process, which can also lead to a production stop on the lathes.

Aus diesem Grund sind Vorrichtungen zum Zerkleinern von Metallspänen bekannt, bei denen die rotierbaren Messerwellen jeweils mit mehreren Schneidmesser-Modulen bestückt sind, die einzeln auf die Messerwellen aufgesetzt werden können und so lösbar an der Messerwelle befestigt werden, dass in Rotationsrichtung der Messerwelle gesehen jeweils zumindest zwei Schneidmodule vorhanden sind. Entsprechende Vorrichtungen sind beispielsweise aus der DE 20 2009 017 062 U1 bekannt.For this reason, devices for comminuting metal chips are known in which the rotatable cutter shafts are each equipped with several cutting blade modules that can be placed individually on the cutter shafts and are detachably attached to the cutter shaft in such a way that, viewed in the direction of rotation of the cutter shaft, at least two cutting modules are available. Corresponding devices are, for example, from DE 20 2009 017 062 U1 known.

Bei diesen Vorrichtungen handelt es sich um separate Geräte, die oftmals nicht direkt neben der Drehmaschine vorhanden sind. Sofern kein Endlosförderer von der Drehmaschine zu der Vorrichtung zum Zerkleinern von Metallspänen vorhanden ist, müssen die Späne manuell zu der Vorrichtung transportiert und dort häufig ebenfalls manuell der Vorrichtung zugeführt werden. Auch hierbei besteht wieder die Gefahr von Verletzungen durch die scharfkantigen Späne. Aus der EP 3 178 560 A1 ist daher eine Vorrichtung zum Zerkleinern von Metallspänen bekannt, bei der die Messerwelle so nahe an dem Endlosförderer positioniert ist, dass die von dem Endlosförderer transportierten Metallspäne durch die Schneidmodule der Messerwelle abstreifbar sind. Der Endlosförderer und die Messerwelle werden dabei durch einen gemeinsamen motorischen Antrieb angetrieben.These devices are separate devices that are often not located directly next to the lathe. Unless there is an endless conveyor from the lathe to the device for crushing metal shavings, the shavings must be closed manually transported to the device and are often also fed manually to the device there. Again, there is a risk of injury from the sharp-edged chips. From the EP 3 178 560 A1 Therefore, a device for crushing metal shavings is known in which the blade shaft is positioned so close to the endless conveyor that the metal shavings transported by the endless conveyor can be scraped off by the cutting modules of the blade shaft. The endless conveyor and the knife shaft are driven by a common motor drive.

Insbesondere bei sehr langen Spänen kann es darüber hinaus bereits auf dem Endlosförderer zu einem Verheddern der Metallspäne kommen. Dies kann dazu führen, dass die Späne nicht mehr vom Endlosförderer in die Vorrichtung zum Zerkleinern von Metallspänen fallen, sondern am Endlosförderer hängen bleiben. Dadurch kann es zu einem Verstopfen des Endlosförderers kommen, was einen Produktionsstopp nach sich führen kann. In einem solchen Fall muss der Endlosförderer geöffnet und die eingezogenen Späne müssen entfernt werden, bevor ein Betrieb des Endlosförderers wieder möglich ist. Derartige Instandhaltungsarbeiten sind zeitaufwändig und damit wirtschaftlich nachteilig. Auch muss das Entfernen der Metallspäne in der Regel manuell vorgenommen werden, was eine erhöhte Verletzungsgefahr durch die scharfkantigen Metallspäne mit sich bringt.Particularly in the case of very long chips, the metal chips can also become entangled on the endless conveyor. This can lead to the fact that the chips no longer fall from the endless conveyor into the device for crushing metal chips, but get stuck on the endless conveyor. This can cause the endless conveyor to become clogged, which can lead to a production stop. In such a case, the endless conveyor must be opened and the drawn-in chips must be removed before the endless conveyor can be operated again. Such maintenance work is time-consuming and therefore economically disadvantageous. The metal shavings must also generally be removed manually, which entails an increased risk of injury from the sharp-edged metal shavings.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Ausgehend von diesem vorbekannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine verbesserte Vorrichtung zum Zerkleinern von Metallspänen anzugeben, die einen möglichst wartungsarmen Betrieb ermöglicht.Proceeding from this previously known state of the art, the invention is based on the object of specifying an improved device for comminuting metal chips, which enables operation with as little maintenance as possible.

Die erfindungsgemäße Vorrichtung zum Zerkleinern von Metallspänen ist durch die Merkmale des Hauptanspruchs 1 gegeben. Sinnvolle Weiterbildungen der Erfindung sind Gegenstand von sich an diesen Anspruch anschließenden weiteren Ansprüchen.The device according to the invention for crushing metal chips is given by the features of main claim 1. Meaningful developments of the invention are the subject matter of further claims that follow this claim.

Die erfindungsgemäße Vorrichtung zum Zerkleinern von Metallspänen besitzt zumindest eine rotierbar gelagerte Messerwelle. An jeder Messerwelle können zumindest zwei Schneidmodule lösbar befestigt sein, die mit zumindest einer feststehenden Messerleiste zusammenwirken und dadurch ein Zerkleinern der Späne bewirken. Die Schneidmodule können dabei jeweils einzeln auf die Messerwelle aufgesetzt und so lösbar an der Messerwelle befestigt werden, dass in Rotationsrichtung der Messerwelle gesehen jeweils zumindest zwei Schneidmodule vorhanden sind. Darüber hinaus kann die Vorrichtung so positioniert werden, dass die von einem Endlosförderer transportierten Metallspäne durch die an der Messerwelle befestigten Schneidmodule von dem Endlosförderer abstreifbar sind. Erfindungsgemäß ist die zumindest eine Messerwelle dabei oberhalb des Endlosförderers oder etwa auf gleicher Höhe mit dem Endlosförderer angeordnet.The device according to the invention for comminuting metal chips has at least one rotatably mounted cutter shaft. At least two cutting modules can be detachably fastened to each cutter shaft, which interact with at least one fixed cutter bar and thereby cause the chips to be comminuted. The cutting modules can each be placed individually on the blade shaft and releasably attached to the blade shaft in such a way that at least two cutting modules are present, viewed in the direction of rotation of the blade shaft. In addition, the device can be positioned in such a way that the metal chips transported by an endless conveyor can be scraped off the endless conveyor by the cutting modules attached to the knife shaft. According to the invention, the at least one knife shaft is arranged above the endless conveyor or approximately at the same height as the endless conveyor.

Durch die Anordnung der zumindest einen Messerwelle oberhalb oder auf gleicher Höhe mit dem Endlosförderer kann das Abstreifen der Metallspäne besonders effektiv erfolgen. Darüber hinaus können sich zwischen dem Endlosförderer und dem Gehäuse des Endlosförderers keine Späneknäuel mehr bilden, da die Späne rechtzeitig vorher durch die Messerwelle zerkleinert werden.By arranging the at least one cutter shaft above or at the same level as the endless conveyor, the metal chips can be scraped off particularly effectively. In addition, shavings can no longer form between the endless conveyor and the housing of the endless conveyor, since the shavings are shredded by the cutter shaft in good time.

In einer ersten Ausführungsform kann der Endlosförderer einen ersten Förderbereich aufweisen, der etwa horizontal verläuft. An diesen ersten Förderbereich kann sich ein zweiter Förderbereich anschließen, der ansteigend verläuft, so dass sich ein konkaver Bereich des Endlosförderers ergibt. In diesem konkaven Bereich des Endlosförderers kann in diesem Fall die zumindest eine Messerwelle angeordnet sein.In a first embodiment, the endless conveyor can have a first conveying area that runs approximately horizontally. This first conveying area can be followed by a second conveying area that rises, resulting in a concave area of the endless conveyor. In this case, the at least one knife shaft can be arranged in this concave area of the endless conveyor.

Insbesondere in dem konkaven Bereich des Endlosförderers am Übergang zwischen dem horizontalen Förderbereich und dem ansteigend verlaufenden Förderbereich kommt es vermehrt zur Knäuelbildung der Metallspäne. Die Metallspäne können sich in diesem Bereich besonders leicht miteinander verhaken und den regulären Transportfluss auf diese Weise stören. Greifen die Schneidmodule bereits an dieser Stelle des Endlosförderers an, kann diese Knäuelbildung effektiv verhindert werden, so dass ein störungsfreier Betrieb des Endlosförderers und damit auch der Drehmaschinen möglich ist.In particular, in the concave area of the endless conveyor at the transition between the horizontal conveying area and the ascending conveying area, the metal chips tend to form clumps. The metal shavings can easily get caught in this area and thus disrupt the regular transport flow. If the cutting modules already grip the endless conveyor at this point, this tangle formation can be effectively prevented, so that trouble-free operation of the endless conveyor and thus also the lathes is possible.

Alternativ oder zusätzlich zu dem konkaven Bereich des Endlosförderers kann der Endlosförderer in einer zweiten Ausführungsform ein erstes umlaufendes Förderband und ein zweites umlaufendes Förderband aufweisen, die unmittelbar hintereinander vorhanden sind, so dass die Metallspäne von dem ersten umlaufenden Förderband an das zweite umlaufende Förderband übergeben werden. In diesem Übergangsbereich zwischen den Förderbändern kann es ebenfalls vermehrt zur Knäuelbildung der Metallspäne kommen. Daher kann die Messerwelle in diesem Übergangsbereich angeordnet sein, so dass die Schneidmodule bereits an dieser Stelle angreifen können. Dadurch kann die Knäuelbildung effektiv verhindert werden, so dass ein störungsfreier Betrieb des Endlosförderers und damit auch der Drehmaschinen möglich ist.Alternatively or in addition to the concave area of the endless conveyor, the endless conveyor in a second embodiment can have a first circulating conveyor belt and a second circulating conveyor belt, which are present one behind the other, so that the metal chips are transferred from the first circulating conveyor belt to the second circulating conveyor belt. In this transition area between the conveyor belts, the metal chips can also increasingly form tangles. Therefore, the knife shaft can be arranged in this transition area, so that the cutting modules can act at this point. This effectively prevents the formation of tangles, so that trouble-free operation of the endless conveyor and thus also of the lathes is possible.

In einer dritten Ausführungsform, die ebenfalls alternativ oder zusätzlich zu den beiden ersten Ausführungsformen eingesetzt werden kann, kann die zumindest eine Messerwelle in Transportrichtung des Endlosförderers gesehen vor dem Endlosförderer angeordnet sein. Die Achse der zumindest einen Messerwelle kann dabei etwa auf der Höhe des Umkehrpunktes des Endlosförderers angeordnet sein. Auf diese Weise kann verhindert werden, dass sich die Metallspäne kurz vor dem Ende des Endlosförderers an dem Gehäuse des Endlosförderers stauen und es auf diese Weise zu einer Knäuelbildung kommt.In a third embodiment, which can also be used as an alternative or in addition to the first two embodiments, the at least one cutter shaft can be arranged in front of the endless conveyor, viewed in the transport direction of the endless conveyor. the The axis of the at least one knife shaft can be arranged approximately at the level of the reversal point of the endless conveyor. In this way, it is possible to prevent the metal chips from accumulating on the housing of the endless conveyor shortly before the end of the endless conveyor, which would result in a tangle being formed.

Die modulare Art der Befestigung der einzelnen Schneidmodule ermöglicht es, ein defektes Schneidmodul einzeln von der Messerwelle zu lösen und auszutauschen, ohne dass andere, benachbarte Schneidmodule mit betroffen wären. Auch ist es nicht notwendig, die Messerwelle aus dem Gehäuse auszubauen. Das Auswechseln der einzelnen Schneidmodule ist somit unkompliziert und rasch möglich, so dass es nur zu einer kurzen Standzeit der Vorrichtung während einer Wartung kommt.The modular way of fastening the individual cutting modules makes it possible to detach a defective cutting module individually from the knife shaft and replace it without affecting other neighboring cutting modules. It is also not necessary to remove the blade shaft from the housing. The replacement of the individual cutting modules is thus possible in an uncomplicated and rapid manner, so that the device only has a short downtime during maintenance.

Die Befestigung der Schneidmodule an der Messerwelle kann über zumindest eine Schraubverbindung erfolgen. Vorzugsweise können die einzelnen Schneidmodule jeweils mit zumindest zwei Schrauben an der Messerwelle festgeschraubt werden. Diese Art der Befestigung ist einfach umsetzbar und ermöglicht eine feste und dauerhafte Befestigung, die auch größeren Krafteinwirkungen standhalten kann.The cutting modules can be fastened to the knife shaft via at least one screw connection. Preferably, the individual cutting modules can each be screwed to the blade shaft with at least two screws. This type of attachment is easy to implement and enables a firm and permanent attachment that can also withstand greater forces.

Die einzelnen Schneidmodule weisen jeweils zumindest einen Schneidzahn auf, der mit der feststehenden Messerleiste der Vorrichtung zusammenwirkt, um die Metallspäne zu zerkleinern. Die Schneidmodule können so ausgebildet sein, dass jeweils nur ein einzelner Schneidzahn je Schneidmodul vorhanden ist. In einer alternativen Ausführungsform können mehrere Schneidzähne je Schneidmodul vorhanden sein. Dies kann beispielsweise dadurch realisiert werden, dass bei gleicher Größe des Schneidmoduls statt eines mittleren Schneidzahns zumindest zwei seitliche, außen liegende Schneidzähne vorhanden sind. Alternativ oder zusätzlich dazu könnte das Schneidmodul entsprechend größer ausgebildet sein und mehrere Schneidzähne besitzen.The individual cutting modules each have at least one cutting tooth which interacts with the fixed blade bar of the device in order to comminute the metal chips. The cutting modules can be designed in such a way that there is only one individual cutting tooth per cutting module. In an alternative embodiment, there can be several cutting teeth per cutting module. This can be realized, for example, by having at least two lateral, external cutting teeth instead of one central cutting tooth, given the same size of the cutting module. As an alternative or in addition to this, the cutting module could be made correspondingly larger and have several cutting teeth.

In einer bevorzugten Ausführungsform kann die rotierbar gelagerte Messerwelle in ihrer Mantelfläche mehrere Taschen aufweisen, in denen jeweils ein Schneidmodul positioniert werden kann. Dadurch kann neben der Befestigung auch ein einfaches Positionieren der einzelnen Schneidmodule an der Messerwelle ermöglicht werden, was insbesondere für die Erstmontage der einzelnen Schneidmodule wünschenswert sein kann. Die Schneidmodule können exakt in die Taschen eingesetzt werden und haben eine genau definierte Position in Bezug auf benachbarte Schneidmodule inne, so dass ein optimales Schneidergebnis erzielt werden kann. Die Montage und das Auswechseln der Schneidmodule kann nach wie vor rasch erfolgen, so dass sowohl bei der Erstmontage als auch beim Auswechseln eines oder mehrerer Schneidmodule nur eine geringe Montagezeit benötigt wird. Die Taschen können vorzugsweise in die Mantelfläche eingefräst sein.In a preferred embodiment, the rotatably mounted cutter shaft can have a plurality of pockets in its lateral surface, in each of which a cutting module can be positioned. As a result, in addition to fastening, the individual cutting modules can also be easily positioned on the knife shaft, which can be particularly desirable for the initial assembly of the individual cutting modules. The cutting modules can be inserted exactly into the pockets and have a precisely defined position in relation to neighboring cutting modules, so that an optimal cutting result can be achieved. The cutting modules can still be installed and replaced quickly, so that only a short installation time is required both for the initial installation and for the replacement of one or more cutting modules. The pockets can preferably be milled into the lateral surface.

Dabei hat es sich als vorteilhaft herausgestellt, die Taschen mit einem kreisförmigen Querschnitt auszubilden. Die Taschen lassen sich dadurch konstruktiv einfach mittels eines Vollbohrer anbringen, so dass die Herstellungskosten reduziert werden können. Vorzugsweise können die Schneidmodule in diesem Fall eine kreisförmige Basis aufweisen, die in die Taschen der Messerwelle eingesetzt werden kann. Der kreisförmige Querschnitt der Taschen und der Basis der Schneidmodule reduziert den Verschleiß der Schneidmodule und verringert die Verformungen der Schneidmodule sowie der Schrauben zur Befestigung der Schneidmodule an der Messerwelle. Dies erleichtert auch das Auswechseln der Schneidmodule, da sich die Schrauben einfacher lösen lassen.It has turned out to be advantageous to design the pockets with a circular cross-section. As a result, the pockets can be attached in a structurally simple manner using a solid drill, so that the manufacturing costs can be reduced. Advantageously, in this case, the cutting modules can have a circular base that can be inserted into the pockets of the cutterblock. The circular cross-section of the pockets and the base of the cutting modules reduces wear and tear on the cutting modules and reduces deformation of the cutting modules and the screws that attach the cutting modules to the cutterhead. This also makes it easier to change the cutting modules, since the screws can be loosened more easily.

Vorzugsweise kann die rotierbar gelagerte Messerwelle zylinderförmig ausgebildet sein. Der Querschnitt der rotierbar gelagerten Messerwelle wäre in diesem Fall - abgesehen von den in der Mantelfläche vorhandenen Taschen - kreisförmig.The rotatably mounted cutter shaft can preferably be configured in a cylindrical manner. In this case, the cross section of the rotatably mounted cutter shaft would be circular—apart from the pockets present in the lateral surface.

Auch die feststehende Messerleiste kann modular ausgebildet sein. Dazu kann die Messerleiste mehrere Messereinheiten besitzen, die beispielsweise an einem gemeinsamen Messerhalter befestigt werden können. Dadurch können auch die einzelnen Module der feststehenden Messerleiste einfach ausgetauscht werden, sofern eine der Messereinheiten defekt ist. Die Befestigung der einzelnen Messereinheiten kann beispielsweise über eine oder mehrere Schrauben erfolgen.The fixed male connector can also be of modular design. For this purpose, the male connector can have multiple knife units that For example, can be attached to a common knife holder. As a result, the individual modules of the fixed knife strip can also be easily replaced if one of the knife units is defective. The attachment of the individual blade units can be done, for example, using one or more screws.

Die erfindungsgemäße Vorrichtung kann mit einem entsprechenden Endlosförderer zusammen erworben und aufgebaut werden. Es wäre jedoch auch möglich, einen bereits bestehenden Endlosförderer entsprechend nachzurüsten. Daher kann die Messerwelle vorzugsweise über einen separaten motorischen Antrieb verfügen. Der Endlosförderer und die Messerwelle können auf diese Weise jeweils separat über eigene motorische Antriebe angetrieben werden. Um einen optimalen Betrieb der erfindungsgemäßen Vorrichtung zu ermöglichen, sollten die Messerwelle und der Endlosförderer so miteinander verbunden sein, dass ein vordefinierter Abstand der einzelnen Schneidmodule von den Förderbändern des Endlosförderers eingehalten wird. Vorzugsweise kann dazu das Gehäuse der Messerwelle fest mit dem Gehäuse des Endlosförderers verbunden sein.The device according to the invention can be purchased and set up together with a corresponding endless conveyor. However, it would also be possible to retrofit an existing endless conveyor accordingly. Therefore, the knife shaft can preferably have a separate motor drive. In this way, the endless conveyor and the knife shaft can each be driven separately via their own motor drives. In order to enable optimal operation of the device according to the invention, the knife shaft and the endless conveyor should be connected to one another in such a way that a predefined distance between the individual cutting modules and the conveyor belts of the endless conveyor is maintained. For this purpose, the housing of the cutter shaft can preferably be firmly connected to the housing of the endless conveyor.

Weitere Vorteile und Merkmale der Erfindung sind den in den Ansprüchen ferner angegebenen Merkmalen sowie den nachstehenden Ausführungsbeispielen zu entnehmen.Further advantages and features of the invention can be found in the features also specified in the claims and in the exemplary embodiments below.

KURZE BESCHREIBUNG DER ZEICHNUNGBRIEF DESCRIPTION OF THE DRAWING

Die Erfindung wird im Folgenden anhand der in der Zeichnung dargestellten Ausführungsbeispiele näher beschrieben und erläutert. Es zeigen:

Fig. 1
einen schematischen Querschnitt durch eine erste Ausführungsform der erfindungsgemäßen Vorrichtung,
Fig. 2
eine Seitenansicht der Messerwelle der erfindungsgemäßen Vorrichtung ohne in die Taschen einzusetzende Schneidmodule,
Fig. 3
einen Querschnitt durch die Messerwelle gemäß Fig. 2,
Fig. 4
eine Draufsicht auf ein in die Taschen der Messerwelle einzusetzendes Schneidmodul,
Fig. 5
eine Seitenansicht des Schneidmoduls gemäß Fig. 4, und
Fig. 6
einen schematischen Querschnitt durch eine zweite Ausführungsform der erfindungsgemäßen Vorrichtung.
The invention is described and explained in more detail below with reference to the exemplary embodiments shown in the drawing. Show it:
1
a schematic cross section through a first embodiment of the device according to the invention,
2
a side view of the knife shaft of the device according to the invention without cutting modules to be inserted into the pockets,
3
according to a cross section through the knife shaft 2 ,
4
a top view of a cutting module to be inserted into the pockets of the knife shaft,
figure 5
a side view of the cutting module according to FIG 4 , and
6
a schematic cross section through a second embodiment of the device according to the invention.

WEGE ZUM AUSFÜHREN DER ERFINDUNGWAYS TO CARRY OUT THE INVENTION

Eine erste Ausführungsform der erfindungsgemäßen Vorrichtung 10 zum Zerkleinern von Metallspänen 12 ist schematisch in Fig. 1 dargestellt. Die Vorrichtung 10 weist eine Messerwelle 20 auf, die in einem Lagerblock 22 rotierbar gelagert ist. Die Messerwelle 20 kann mittels eines nicht dargestellten motorischen Antriebs um die Drehachse 24 rotierbar angetrieben werden. Die Rotationsrichtung 26 verläuft im vorliegenden Beispielsfall gegen den Uhrzeigersinn.A first embodiment of the device 10 according to the invention for crushing metal chips 12 is shown schematically in 1 shown. The device 10 has a knife shaft 20 which is rotatably mounted in a bearing block 22 . The knife shaft 20 can be driven to rotate about the axis of rotation 24 by means of a motor drive (not shown). The direction of rotation 26 runs counterclockwise in the present example.

Die Messerwelle 20 besitzt im vorliegenden Beispielsfall einen kreisförmigen Querschnitt. In der Mantelfläche 30 sind im vorliegenden Beispielsfall mehrere Taschen 32 vorhanden, die jeweils einen kreisförmigen Querschnitt aufweisen (siehe Fig. 2). In jeder der Taschen 32 kann ein Schneidmodul 40 (siehe Fig. 4 und 5) eingesetzt und befestigt werden. Die Schneidmodule 40 weisen dazu eine kreisförmige Basis 42 auf, deren Durchmesser an den Durchmesser der Taschen 32 angepasst ist. Jedes Schneidmodul 40 besitzt jeweils einen Schneidzahn 44, der mittig der Basis 42 angeordnet ist. Die Schneidmodule 40 weisen darüber hinaus jeweils eine Bohrung 46 auf, in die eine Schraube 48 eingreifen kann, um die Schneidmodule 40 mittels einer Schraubverbindung an der Messerwelle 20 zu befestigen.In the present example, the cutter shaft 20 has a circular cross section. In the present example, there are a number of pockets 32 in the lateral surface 30, each of which has a circular cross section (see FIG 2 ). In each of the pockets 32, a cutting module 40 (see Figures 4 and 5 ) are inserted and fastened. For this purpose, the cutting modules 40 have a circular base 42 whose diameter is adapted to the diameter of the pockets 32 . Each cutting module 40 has a respective cutting tooth 44 which is arranged centrally on the base 42 . In addition, the cutting modules 40 each have a bore 46 into which a screw 48 engages can, in order to fasten the cutting modules 40 to the knife shaft 20 by means of a screw connection.

Die Schneidmodule 40 können einzeln von der Messerwelle 20 entfernt werden. Nach dem Lösen der Befestigungsschraube 48 kann das auszuwechselnde Schneidmodul 40 von der Messerwelle 20 entfernt werden. Die Messerwelle 20 selbst muss dazu nicht aus dem Lagerblock 22 ausgebaut werden. Auch müssen keine weiteren Schneidmodule 40, die nicht ausgetauscht werden sollen, entfernt werden. Die Auswechslung defekter Schneidmodule 40 gestaltet sich somit rasch und unproblematisch und ist daher wirtschaftlich vorteilhaft.The cutting modules 40 can be removed from the knife shaft 20 individually. After the fastening screw 48 has been loosened, the cutting module 40 to be replaced can be removed from the knife shaft 20 . The knife shaft 20 itself does not have to be removed from the bearing block 22 for this purpose. Also, no further cutting modules 40 that are not to be exchanged have to be removed. The replacement of defective cutting modules 40 is thus quick and unproblematic and is therefore economically advantageous.

Die Schneidzähne 44 der Schneidmodule 40 wirken mit einer feststehenden Messerleiste 50 zusammen, um die Metallspäne 12 zu zerkleinern. Die feststehende Messerleiste 50 ist mittels mehrerer Schrauben 52 an einem Messerhalter 54 befestigt. Der Messerhalter 54 selbst ist an dem Lagerblock 22 für die Messerwelle 20 befestigt.The cutting teeth 44 of the cutting modules 40 interact with a fixed cutter bar 50 in order to comminute the metal chips 12 . The stationary knife strip 50 is fastened to a knife holder 54 by means of several screws 52 . The knife holder 54 itself is attached to the bearing block 22 for the knife shaft 20.

Die Messerleiste 50 ist im vorliegenden Beispielsfall modular aufgebaut und besitzt mehrere Messereinheiten 56. Die Anzahl der Messereinheiten 56 kann der Anzahl der Schneidmodule 40 in Längsrichtung der Messerwelle 20 gesehen entsprechen. Die einzelnen Messereinheiten 56 sind jeweils über eine oder mehrere Schrauben 52 an dem Messerhalter 54 befestigt. Durch den modularen Aufbau der feststehenden Messerleiste 50 können die einzelnen Messereinheiten 56 im Fall eines Defekt ebenfalls leicht ausgetauscht werden.In the present example, the knife strip 50 has a modular structure and has several knife units 56. The number of knife units 56 can correspond to the number of cutting modules 40 viewed in the longitudinal direction of the knife shaft 20. The individual blade units 56 are each fastened to the blade holder 54 via one or more screws 52 . Due to the modular structure of the fixed blade strip 50, the individual blade units 56 can also be easily replaced in the event of a defect.

Die Vorrichtung 10 besitzt darüber hinaus einen Endlosförderer 60 für Metallspäne 12. Der Endlosförderer 60 ist so nahe an der rotierbar gelagerten Messerwelle 20 platziert ist, dass die einzelnen Schneidmodule 40 als Abstreifer für die Metallspäne 12 dienen können. Der Endlosförderer 60 besitzt einen ersten Förderbereich 62, der etwa horizontal verläuft. An diesen ersten Förderbereich 62 schließt sich ein zweiter Förderbereich 64 an, der ansteigend verläuft. Zwischen diesen beiden Förderbereichen 62, 64 ergibt sich somit ein konkaver Bereich 66 des Endlosförderers 60. In diesem konkaven Bereich 66 des Endlosförderers 60 kommt es vermehrt zur Knäuelbildung der Metallspäne 12. Die Messerwelle 20 ist daher in diesem konkaven Bereich 66 des Endlosförderers 60 platziert. Auf diese Weise kann eine Knäuelbildung effektiv verhindert werdenThe device 10 also has an endless conveyor 60 for metal shavings 12. The endless conveyor 60 is placed so close to the rotatably mounted blade shaft 20 that the individual cutting modules 40 can serve as scrapers for the metal shavings 12. The endless conveyor 60 has a first conveying area 62 which runs approximately horizontally. This first conveying area 62 is followed by a second conveying area 64 which runs uphill. A concave area 66 of the Endless conveyor 60. In this concave area 66 of the endless conveyor 60, the metal chips 12 increasingly form balls. The cutter shaft 20 is therefore placed in this concave area 66 of the endless conveyor 60. In this way, tangle formation can be effectively prevented

Es hat sich dabei als ausreichend nahe herausgestellt, wenn der Abstand zwischen den Schneidzähnen 44 der Schneidmodule 40 und dem Förderband 68 des Endlosförderers 60 etwa zwei Zentimeter beträgt. Bei diesem Abstand kann sichergestellt werden, dass die Schneidzähne 44 das Förderband 68 nicht beschädigen können, gleichzeitig können die regelmäßig sehr langen Metallspäne 12 auf diese Weise verlässlich von den Schneidmodulen 40 mitgenommen werden.It has been found to be sufficiently close if the distance between the cutting teeth 44 of the cutting modules 40 and the conveyor belt 68 of the endless conveyor 60 is about two centimeters. With this distance, it can be ensured that the cutting teeth 44 cannot damage the conveyor belt 68, and at the same time the metal chips 12, which are usually very long, can be reliably carried along by the cutting modules 40 in this way.

In Fig. 6 ist eine zweite Ausführungsform der erfindungsgemäßen Vorrichtung 10.2 zum Zerkleinern von Metallspänen 12 schematisch dargestellt. Die Vorrichtung 10.2 weist eine Messerwelle 20.2 auf, die in einem Lagerblock 22.2 rotierbar gelagert ist. Die Messerwelle 20.2 kann mittels eines nicht dargestellten motorischen Antriebs um die Drehachse 24 rotierbar angetrieben werden. Die Rotationsrichtung verläuft im vorliegenden Beispielsfall im Uhrzeigersinn. Die Messerwelle 20.2 entspricht im Wesentlichen der Messerwelle 20, die in den Fig. 2 bis 5 dargestellt ist.In 6 a second embodiment of the device 10.2 according to the invention for crushing metal chips 12 is shown schematically. The device 10.2 has a knife shaft 20.2, which is rotatably mounted in a bearing block 22.2. The blade shaft 20.2 can be driven to rotate about the axis of rotation 24 by means of a motor drive, not shown. In the present example, the direction of rotation is clockwise. The knife shaft 20.2 essentially corresponds to the knife shaft 20 in the Figures 2 to 5 is shown.

Die Schneidzähne 44 der Schneidmodule 40 der Messerwelle 20.2 wirken mit einer feststehenden Messerleiste 50.2 zusammen, um die Metallspäne 12 zu zerkleinern. Die feststehende Messerleiste 50.2 ist mittels mehrerer Schrauben an einem Messerhalter 54.2 befestigt. Die Messerleiste 50.2 ist im vorliegenden Beispielsfall wie auch die Messerleiste 50 modular aufgebaut.The cutting teeth 44 of the cutting modules 40 of the cutter shaft 20.2 interact with a stationary cutter bar 50.2 in order to crush the metal chips 12. The stationary knife strip 50.2 is fastened to a knife holder 54.2 by means of several screws. In the present example, the male connector 50.2, like the male connector 50, has a modular structure.

Die Vorrichtung 10.2 besitzt darüber hinaus einen Endlosförderer 60.2 für Metallspäne 12. Der Endlosförderer 60.2 ist in einem Gehäuse 70 angeordnet. Die Antriebswelle 72 des Endlosförderers 60.2 ist dabei rotierbar in dem Gehäuse 70 gelagert. Insbesondere im Endbereich des Endlosförderers 60.2 kommt es vermehrt zur Knäuelbildung, da sich die einzelnen Metallspäne 12 am Gehäuse verhaken und auf diese Weise aufstauen können. Daher ist der Endlosförderer 60.2 einerseits so nahe an der rotierbar gelagerten Messerwelle 20.2 platziert, dass die einzelnen Schneidmodule 40 als Abstreifer für die Metallspäne 12 dienen können. Darüber hinaus ist die Messerwelle 20.2 mit ihrer Drehachse 24 auf einer Höhe mit der Antriebswelle 72 des Endlosförderers und damit auf der Höhe des Umkehrpunktes des Endlosförderers 60.2 angeordnet. Auf diese Weise kann eine Knäuelbildung effektiv verhindert werden.The device 10.2 also has an endless conveyor 60.2 for metal chips 12. The endless conveyor 60.2 is arranged in a housing 70. The drive shaft 72 of the endless conveyor 60.2 is rotatably mounted in the housing 70. Especially in the end of the With the endless conveyor 60.2, tangles are increasingly formed, since the individual metal chips 12 can get caught on the housing and accumulate in this way. Therefore, the endless conveyor 60.2 is placed on the one hand so close to the rotatably mounted blade shaft 20.2 that the individual cutting modules 40 can serve as scrapers for the metal chips 12. In addition, the knife shaft 20.2 is arranged with its axis of rotation 24 at the same height as the drive shaft 72 of the endless conveyor and thus at the height of the reversal point of the endless conveyor 60.2. In this way, tangle formation can be effectively prevented.

Im vorliegenden Beispielsfall rotiert sowohl die Messerwelle 20.2 als auch der Endlosförderer 60.2 im Uhrzeigersinn. Grundsätzlich wäre es jedoch auch möglich, die Messerwelle 20.2 im Gegen-Uhrzeigersinn rotieren zu lassen.In the present example, both the knife shaft 20.2 and the endless conveyor 60.2 rotate clockwise. In principle, however, it would also be possible to rotate the knife shaft 20.2 counterclockwise.

Grundsätzlich ist es möglich, einen Endlosförderer mit mehreren rotierbar gelagerten Messerwellen zum Zerkleinern der Metallspäne auszurüsten. So wäre es beispielsweise möglich, im konkaven Bereich relativ zu Beginn des Endlosförderers eine erste rotierbar gelagerte Messerwelle entsprechend Fig. 1 vorzusehen. Im Endbereich des Endlosförderers könnte darüber hinaus eine weitere rotierbar gelagerte Messerwelle entsprechend Fig. 6 angeordnet sein.In principle, it is possible to equip an endless conveyor with several rotatably mounted cutter shafts for crushing the metal chips. It would thus be possible, for example, in the concave area relative to the start of the endless conveyor, to have a first rotatably mounted knife shaft 1 to foresee. In the end area of the endless conveyor, a further rotatably mounted knife shaft could also be used accordingly 6 be arranged.

Claims (9)

  1. Device (10, 10.2) for comminuting metal chips (12),
    - having at least one rotatably mounted knife shaft (20, 20.2), to which at least two cutting modules (40) are detachably fixed, the cutting modules (40) each being placed individually on the at least one knife shaft (20, 20.2) and being fixed detachably such that, as seen in the direction of rotation (26) of the knife shaft (20, 20.2), there are at least two cutting modules (40) in each case,
    - having a motor drive for rotating the at least one knife shaft (20, 20.2),
    - having at least one stationary knife bar (50, 50.2) interacting with the cutting modules (40) of the at least one knife shaft (20, 20.2),
    - having at least one endless conveyor (60, 60.2) for metal chips (12), wherein the metal chips (12) transported by the endless conveyor (60, 60.2) can be stripped off the endless conveyor (60, 60.2) by the cutting modules (40) fixed to the knife shaft (20, 20.2),
    - characterized in that
    - the at least one knife shaft (20, 20.2) is arranged above the endless conveyor (60, 60.2) or approximately at the same height as the endless conveyor (60, 60.2).
  2. Device according to Claim 1,
    wherein
    - the endless conveyor (60) has a first conveyor area (62) which runs approximately horizontally, and a second conveyor area (64) which adjoins the first conveyor area (62) and runs uphill, so that a concave area (66) of the endless conveyor (60) results,
    - the at least one knife shaft (20) is arranged in the concave area (66) of the endless conveyor (60).
  3. Device according to Claim 1 or 2,
    wherein
    - the endless conveyor has a first circulating conveyor belt and a second circulating conveyor belt, which are immediately after one another, so that the metal chips can be transferred from the first circulating conveyor belt to the second circulating conveyor belt,
    - the at least one knife shaft is arranged in the transition area between the first circulating conveyor belt and the second circulating conveyor belt.
  4. Device according to one of Claims 1 to 3,
    wherein
    - the at least one knife shaft (20.2) is arranged before the endless conveyor (60.2), as viewed in the transport direction of the endless conveyor (60.2),
    - the axis of rotation (24) of the at least one knife shaft (20.2) is arranged approximately at the height of the turning point (72) of the endless conveyor (60.2).
  5. Device according to Claim 4,
    wherein
    - the direction of circulation of the endless conveyor (60.2) corresponds to the direction of rotation of the at least one knife shaft (20.2).
  6. Device according to one of the preceding claims, wherein
    - the rotatably mounted knife shaft (20) has multiple pockets (32) in its outer surface (30),
    - a cutting module (40) can in each case be inserted into the pockets (32).
  7. Device according to Claim 6,
    wherein
    - the pockets (32) have a circular cross section.
  8. Device according to Claim 7,
    wherein
    - the cutting modules (40) have a circular base (42),
    - the circular base (42) can be inserted into the pockets (32) of the knife shaft (20).
  9. Device according to one of the preceding claims, wherein
    - the rotatably mounted knife shaft (20) is formed cylindrically,
    - the knife shaft (20) has a circular cross section.
EP20157065.2A 2020-02-13 2020-02-13 Device for grinding metal chips Active EP3865216B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20157065.2A EP3865216B1 (en) 2020-02-13 2020-02-13 Device for grinding metal chips

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20157065.2A EP3865216B1 (en) 2020-02-13 2020-02-13 Device for grinding metal chips

Publications (2)

Publication Number Publication Date
EP3865216A1 EP3865216A1 (en) 2021-08-18
EP3865216B1 true EP3865216B1 (en) 2022-10-12

Family

ID=69581988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20157065.2A Active EP3865216B1 (en) 2020-02-13 2020-02-13 Device for grinding metal chips

Country Status (1)

Country Link
EP (1) EP3865216B1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU685330A1 (en) * 1977-06-09 1979-09-15 Предприятие П/Я А-3470 Arrangement for breaking metal chirs
DE4406675A1 (en) 1993-03-08 1994-09-15 Erdwich Zerkleinerungs Systeme Device for cutting comminution of materials
DE202009017062U1 (en) 2009-12-17 2010-03-18 Kilian, Karl-Heinz Device for chipping chips
ES2671022T3 (en) 2015-12-08 2018-06-04 Karl-Heinz Kilian Device for crushing metal shavings
CN110152832B (en) * 2019-06-10 2024-08-27 北京博鲁斯潘精密机床有限公司 Chip cutting and transporting device

Also Published As

Publication number Publication date
EP3865216A1 (en) 2021-08-18

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