EP1517769B1 - Device for cutting a bar of material - Google Patents

Device for cutting a bar of material Download PDF

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Publication number
EP1517769B1
EP1517769B1 EP03762346A EP03762346A EP1517769B1 EP 1517769 B1 EP1517769 B1 EP 1517769B1 EP 03762346 A EP03762346 A EP 03762346A EP 03762346 A EP03762346 A EP 03762346A EP 1517769 B1 EP1517769 B1 EP 1517769B1
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EP
European Patent Office
Prior art keywords
cutting
rotation
axis
knife
blade
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EP03762346A
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German (de)
French (fr)
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EP1517769A1 (en
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Rudolf Kraft
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0666—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by screw or rotary spiral conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/26—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut
    • B26D1/28—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut and rotating continuously in one direction during cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/065—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by the cutter itself because of its form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/006—Cutting members therefor the cutting blade having a special shape, e.g. a special outline, serrations

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Accessories And Tools For Shearing Machines (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Shearing Machines (AREA)

Abstract

Disclosed is a device for cutting a bar of material, comprising a bar-guiding unit (1) which has a guiding axis (10) that runs in the longitudinal direction of the bar, and a cutting tool (3) which is driven around a rotating shaft (4) that runs parallel to the guiding axis (10) and is provided with at least one knife. Said knife comprises at least one blade (7) which extends at least across one section of the circumference, runs in a spiraling manner around the rotating shaft (4), and is located on a surface of revolution having the rotating shaft (4) as an axis of rotation. The radial distance of the blade (7) from the rotating shaft (4) increases along the peripheral extension thereof counter to the sense of rotation at least by a degree that corresponds to the maximum cutting depth. In order to create advantageous cutting conditions, the inventive bar-guiding unit (1) comprises a guiding cylinder (2) that is provided with an engaging opening (9) for the knife, which is delimited by the cutting surface (12) between the guiding cylinder (2) and the surface of revolution defined by the blade (7).

Description

Technisches GebietTechnical area

Die Erfindung bezieht sich auf eine Vorrichtung zum Schneiden eines Gutstranges, umfassend eine Strangführung mit einer in Stranglängsrichtung verlaufenden Führungsachse und ein Schneidwerkzeug, das um eine zur Führungsachse parallele Drehachse antreibbar ist und wenigstens ein Messer mit einer sich zumindest über einen Umfangsabschnitt erstreckenden, um die Drehachse geschraubt verlaufenden, auf einer Rotationsfläche mit der Drehachse als Rotationsachse liegenden Schneide aufweist, deren radialer Abstand von der Drehachse entlang ihrer Umfangserstreckung entgegen dem Drehsinn wenigstens um ein der maximalen Schnittiefe entsprechendes Maß zunimmt.The invention relates to a device for cutting a Gutstranges, comprising a strand guide with a rod extending in the longitudinal direction of the guide axis and a cutting tool which is drivable about an axis parallel to the guide axis of rotation and at least one knife with a at least over a peripheral portion extending to the axis of rotation screwed running, lying on a surface of revolution with the axis of rotation as the axis of rotation blade whose radial distance from the axis of rotation increases along its circumferential extent against the direction of rotation at least by a maximum depth corresponding depth.

Stand der TechnikState of the art

Um einen Gutstrang quer zur Stranglängsrichtung mit einem rotierenden Schneidwerkzeug zu durchtrennen, ohne das Schneidwerkzeug mit einem Vorschubantrieb auszustatten, ist es bekannt ( EP 505 950 B1 ), ein Messerblatt mit einer spiralförmigen Schneide vorzusehen, deren maximale Radiendifferenz zumindest der maximalen Schnittiefe entspricht. Wird ein solches Messerblatt um eine zur Stranglängsrichtung parallele Drehachse angetrieben, so kann das Stranggut mit einem ziehenden Schnitt während einer Umdrehung des Schneidwerkzeuges durchtrennt werden, wenn der Gutstrang in einem Abstandsbereich von der Drehachse zwischen dem kleinsten und dem größten Radius der spiralförmigen Schneide geführt wird. Nachteilig bei diesen bekannten Schneidwerkzeugen ist allerdings, daß der zu durchtrennende Gutstrang während des Schnittes nicht gegenüber dem Schneidwerkzeug in Stranglängsrichtung bewegt werden darf, so daß der Gutstrang zwischen aufeinanderfolgenden Schnitten schrittweise weitergefördert werden muß, was nicht nur einen entsprechenden Schrittförderer für den Gutstrang bedingt, sondern auch die Durchsatzleistung beschränkt, wenn es gilt, den Gutstrang in vorgegebenen Abständen wiederholt zu durchtrennen. Aus diesem Grunde werden für diesen Zweck vielfach rotierende Schneidwerkzeuge eingesetzt, die mit im wesentlichen radial verlaufenden Messerschneiden den Gutstrang schlagartig durchtrennen. Der Gutstrang kann zwar einem solchen rotierenden Schneidwerkzeug kontinuierlich zugeführt werden, doch leidet die Schnittqualität, weil der Gutstrang durch die radialen Messer Schlag- und Quetschwirkungen unterworfen wird. Außerdem muß aufgrund der Schlagbeanspruchung der Messer mit einer verkürzten Standzeit des Schneidwerkzeuges gerechnet werden.In order to cut through a product strand transversely to the strand longitudinal direction with a rotating cutting tool without equipping the cutting tool with a feed drive, it is known (US Pat. EP 505 950 B1 ), to provide a knife blade with a spiral cutting edge whose maximum radius difference corresponds at least to the maximum depth of cut. If such a knife blade is driven by a rotation axis parallel to the strand longitudinal direction, the strand material can be severed with a pulling cut during one rotation of the cutting tool, if the material strand is guided in a distance range from the axis of rotation between the smallest and the largest radius of the spiral cutting edge. A disadvantage of these known cutting tools, however, that the Gutstrang to be cut during the cut must not be moved relative to the cutting tool in strand longitudinal direction, so that the Gutstrang between successive cuts must be gradually promoted, which is not only a corresponding step conveyor for the Gutstrang conditional, but also limits the throughput, if it is necessary to repeatedly cut through the Gutstrang at predetermined intervals. For this reason, rotating cutting tools are often used for this purpose, severing the Gutstrang abruptly with essentially radially extending knife edges. Although the Gutstrang can be fed continuously such a rotating cutting tool, but suffers the quality of cut, because the Gutstrang is subjected by the radial blade impact and crushing effects. In addition, due to the impact stress of the knife must be expected with a shortened life of the cutting tool.

Zum Schneiden von Fleisch ist es bekannt ( US 1 909 029 A ), ein Schneidwerkzeug mit einem Messer einzusetzen, dessen Schneide auf einer Kegelfläche liegt und entgegen dem Drehsinn geschraubt verläuft, so daß bei einer Drehung des Schneidwerkzeuges die im Schnitteingriff befindlichen Abschnitte der Schneide mit dem in Längsrichtung kontinuierlich zugeförderten Gutstrang in axialer Richtung mitbewegt werden. Der durch eine Strangführung dem Schneidwerkzeug zugeförderte Gutstrang wird somit aufgrund der Zunahme des radialen Abstandes der Schneide von der Drehachse entgegen dem Drehsinn mit einem ziehenden Schnitt durchtrennt. Nachteilig bei dieser bekannten Schneidvorrichtung ist vor allem, daß der Gutstrang im Schnittbereich nicht geführt wird, was zwar beim Schneiden von Fleisch in Kauf genommen werden kann, nicht aber bei anderen Materialien.For cutting meat it is known ( US 1 909 029 A ) to use a cutting tool with a knife, the cutting edge is located on a conical surface and screwed counter to the direction of rotation, so that upon rotation of the cutting tool, the sections in the cutting section are moved in the axial direction with the continuously supplied in the longitudinal direction Gutstrang. The supplied by a strand guide the cutting tool Gutstrang is thus severed due to the increase of the radial distance of the cutting edge of the rotation axis against the direction of rotation with a pulling cut. The disadvantage of this known cutting device is especially that the Gutstrang is not performed in the cutting area, which may indeed be taken into account when cutting meat, but not in other materials.

Zur Führung des Gutstranges ist es bei einer anderen bekannten Schneidvorrichtung mit einem Messer, dessen Schneide auf einer Kegelfläche liegt, bekannt ( EP 0 555 190 A2 ), im Eingriffsbereich des Messers den Gutstrang in Umlaufrichtung des Messers in halbzylindrischen, konkaven Schalen abzustützen, gegen die das Schnittgut mit Hilfe gegenüberliegender ebenfalls halbzylindrischer Schalen angedrückt wird. Diese Schalen sind im Eingriffsbereich des Schneidwerkzeuges durch Ebenen begrenzt, die im Bereich der zulaufseitigen Schale eine an den Öffnungswinkel der durch die Messerschneide gebildeten Kegelfläche angepaßte Neigung aufweisen, im Bereich der ablaufseitigen Schale aber senkrecht zur Schalenachse stehen. Damit wird zwar eine Abstützung des zu schneidenden Gutstranges vor und hinter dem Messereingriff erreicht, doch fehlt ein für eine genaue Schnittführung erforderlicher Gegenhalter für das Messer, zumal die Messerwelle gegenüber dem Gutstrang bzw. dessen Führung windschief verläuft, um im Eingriffsbereich einen zum Gutstrang angenähert senkrechten Schneidenverlauf zu erreichen.To guide the Gutstranges it is in another known cutting device with a knife, the cutting edge is on a conical surface known ( EP 0 555 190 A2 ), in the engagement region of the knife support the Gutstrang in the direction of rotation of the knife in semi-cylindrical, concave shells against which the clippings is pressed by means of opposite also semi-cylindrical shells. These shells are limited in the engagement region of the cutting tool by planes which have in the region of the inlet-side shell adapted to the opening angle of the conical surface formed by the knife edge inclination, but are in the region of the drain-side shell perpendicular to the shell axis. In order for a support of the Gutstranges to be cut before and after the knife engagement is achieved, but missing for a precise cut required counter holder for the knife, especially as the blade shaft relative to the Gutstrang or its leadership skewed to an approximately perpendicular to the Gutstrang in the engagement area To achieve cutting profile.

Darstellung der ErfindungPresentation of the invention

Der Erfindung liegt somit die Aufgabe zugrunde, eine Vorrichtung zum Schneiden eines Gutstranges der eingangs geschilderten Art so auszugestalten, daß mit einer einfachen Führung des Gutstranges im Schnittbereich eine gute Schnittqualität unabhängig von dem zu schneidenden Material sichergestellt werden kann.The invention is therefore based on the object, a device for cutting a Gutstranges of the type described in such a way that with a simple guidance of the Gutstranges in the cutting area a good quality cut can be ensured regardless of the material to be cut.

Die Erfindung löst die gestellte Aufgabe dadurch, daß die Strangführung aus einem Führungszylinder mit einer Eingriffsöffnung für das Messer besteht, die durch die Schnittfläche zwischen dem Führungszylinder und der durch die Schneide bestimmten Rotationsfläche begrenzt ist.The invention solves this problem by the fact that the strand guide consists of a guide cylinder with an engagement opening for the knife, which is limited by the sectional area between the guide cylinder and the rotation surface determined by the cutting edge.

Da zufolge dieser Maßnahmen der Rand der Eingriffsöffnung des Führungszylinders als Gegenhalter für das Messer dient, ergibt sich für den Gutstrang eine schnittgerechte Führung im unmittelbaren Eingriffsbereich der Messerschneide, was die angestrebte Schnittqualität mit sich bringt. Obwohl der Schneidenverlauf auf einer Kegelfläche einfache Konstruktionsverhältnisse mit sich bringt, ist die Erfindung nicht auf diese Ausführungsform beschränkt, weil es lediglich zwingend ist, die Schneide entlang einer Rotationsfläche zu führen, deren Abstand von der Rotationsachse sich entlang der Rotationsachse vergrößert.Since, according to these measures, the edge of the engagement opening of the guide cylinder serves as a counterhold for the knife, the result is a crop-like guidance in the immediate area of engagement of the knife edge for the material strand, which brings the desired quality of cut. Although the cutting edge on a conical surface brings about simple construction conditions, the invention is not limited to this embodiment, because it is only necessary to guide the cutting edge along a surface of revolution whose distance from the axis of rotation increases along the axis of rotation.

Weist die Schneide des Messers auf der der Eingriffsöffnung des Führungszylinders gegenüberliegenden Seite eine Anschlifffläche auf, so wird der axiale Vorschub des Gutstranges durch das in den Gutstrang eingreifende Schneidewerkzeug in vorteilhafter Weise unterstützt, so daß ein gesonderter Vorschubantrieb für den Gutstrang unter Umständen entfallen kann.Does the blade of the knife on the opposite side of the engagement of the guide cylinder a grinding surface, the axial feed of the Gutstranges is supported by the engaging in the Gutstrang cutting tool in an advantageous manner, so that a separate feed drive for the Gutstrang can be omitted under certain circumstances.

Bezüglich der Schnittführung ergeben sich besonders vorteilhafte Voraussetzungen, wenn das Messer aus einem wendelförmigen Messerblatt besteht, dessen äußerer Umfangsrand die Schneide bildet. Ein solches in seiner Herstellung aufwendigeres Messerblatt ist allerdings nicht immer erforderlich. Ist der Gutstrang in Stranglängsrichtung nachgiebig, so kann nämlich das Messer ein ebenes, unter einem spitzen Winkel gegenüber der Drehachse geneigtes Messerblatt mit entlang des äußeren Umfangsrandes verlaufender Schneide aufweisen, weil in diesem Fall der Gutstrang in Teilquerschnitten axial durch das Messer verdrängt werden kann. Bei einem solchen ebenen Messerblatt ändert sich auch die Steigung der Schneide, so daß sich die Schneiden solcher Messer nur über einen Umfangsabschnitt von höchstens 180° erstrecken können.With regard to the cutting, particularly advantageous conditions arise when the knife consists of a helical knife blade whose outer peripheral edge forms the cutting edge. However, such a more elaborate knife blade in its production is not always necessary. If the product strand in the longitudinal direction of the strand is yielding, then the knife can have a flat knife blade inclined at an acute angle relative to the axis of rotation with a cutting edge running along the outer peripheral edge, because in this case the product strand can be displaced axially in partial cross sections through the knife. In such a flat blade blade, the inclination of the cutting edge changes, so that the blades of such blades can extend only over a peripheral portion of at most 180 °.

Die mit sich änderndem Radius um die Drehachse geschraubte Schneide des Messers bedingt eine Unwucht, die in geeigneter Weise ausgeglichen werden muß. Werden wenigstens zwei zur Drehachse des Schneidwerkzeuges rotationssymmetrisch angeordnete Strangführungen vorgesehen, so können Unwuchten ohne zusätzliche Konstruktionsmaßnahmen weitgehend vermieden werden, wenn auch das Schneidwerkzeug rotationssymmetrisch angeordnet ist. Dabei kann das Schneidwerkzeug eine der Anzahl der Strangführungen entsprechende Anzahl von zueinander rotationssymmetrisch angeordneten Messern aufweisen. Die Schnittleistung wird durch das gleichzeitige Schneiden von zwei oder mehreren Gutsträngen entsprechend gesteigert.The with the changing radius screwed around the axis of rotation blade of the knife causes an imbalance, which must be compensated in a suitable manner. If at least two rotationally symmetrically arranged to the axis of rotation of the cutting tool strand guides provided so imbalances can be largely avoided without additional design measures, although the cutting tool is arranged rotationally symmetrical. In this case, the cutting tool may have a number of strand guides corresponding number of mutually rotationally symmetrically arranged knives. The cutting performance is increased accordingly by the simultaneous cutting of two or more strands of material.

Kurze Beschreibung der ZeichnungShort description of the drawing

In der Zeichnung ist der Erfindungsgegenstand beispielsweise dargestellt. Es zeigen

Fig. 1
eine erfindungsgemäße Vorrichtung zum Schneiden eines Gutstranges in einem schematischen Axialschnitt,
Fig. 2
diese Vorrichtung in einem Schnitt nach der Linie II-II der Fig. 1,
Fig. 3
einen Axialschnitt durch eine Ausführungsvariante einer erfindungsgemäßen Vorrichtung,
Fig. 4
die Vorrichtung nach der Fig. 3 in einer Draufsicht und
Fig. 5
eine Seitenansicht der Vorrichtung nach der Fig. 3 und 4 in Richtung des Pfeiles V der Fig. 4.
In the drawing, the subject invention is shown, for example. Show it
Fig. 1
a device according to the invention for cutting a Gutstranges in a schematic axial section,
Fig. 2
this device in a section along the line II-II of Fig. 1 .
Fig. 3
an axial section through an embodiment of a device according to the invention,
Fig. 4
the device after the Fig. 3 in a plan view and
Fig. 5
a side view of the device according to the 3 and 4 in the direction of the arrow V the Fig. 4 ,

Wege zur Ausführung der ErfindungWays to carry out the invention

Eine Vorrichtung zum Schneiden eines Gutstranges besteht gemäß dem Ausführungsbeispiel nach den Fig. 1 und 2 aus einer Strangführung 1 in Form eines Führungszylinders 2 und aus einem Schneidwerkzeug 3, das eine zum Führungszylinder 2 parallele Drehachse 4 aufweist. Das Schneidwerkzeug 3 selbst besteht aus einer antreibbaren Welle 5, die ein Messer mit einem wendelförmigen Messerblatt 6 trägt, dessen Schneide mit 7 bezeichnet ist. Wie insbesondere der Fig. 2 entnommen werden kann, nimmt der radiale Abstand r der Schneide 7 von der Drehachse 4 entgegen dem Drehsinn 8 stetig zu, so daß die Schneide 7 des Messerblattes 6 während einer Umdrehung im Drehsinn 8 durch eine Eingriffsöffnung 9 zunehmend in die Strangführung 1 eingreift. Da das Messerblatt 6 einen Schraubengang darstellt, bewegt sich die Schneide 7 während eines Umlaufes des Schneidwerkzeuges 3 nicht nur quer zur Strangführung 1, sondern auch in Richtung der Führungsachse 10, so daß sich ein ziehender Schnitt für den durch die Strangführung 1 geförderten Gutstrang ergibt, und zwar mit einem sich mit dem Gutstrang in Stranglängsrichtung bewegenden Schneideneingriff, was vorteilhafte Schnittbedingungen trotz des kontinuierlichen Vorschubs des Gutstranges sicherstellt.A device for cutting a Gutstrante consists according to the embodiment of the Fig. 1 and 2 from a strand guide 1 in the form of a guide cylinder 2 and from a cutting tool 3, which has a rotation axis 4 parallel to the guide cylinder 2. The cutting tool 3 itself consists of a drivable shaft 5, which carries a knife with a helical knife blade 6, whose cutting edge is denoted by 7. How the particular Fig. 2 can be removed, takes the radial distance r the cutting edge 7 of the rotation axis 4 against the direction of rotation 8 steadily, so that the cutting edge 7 of the knife blade 6 engages increasingly during a revolution in the direction of rotation 8 through an engagement opening 9 in the strand guide 1. Since the knife blade 6 represents a screw thread, the cutting edge 7 moves during one revolution of the cutting tool 3 not only transversely to the strand guide 1, but also in the direction of the guide axis 10, so that there is a pulling section for the promoted by the strand guide 1 Gutstrang, namely with a moving with the Gutstrang in strand longitudinal cutting engagement, which ensures advantageous cutting conditions despite the continuous feed of the Gutstranges.

Wie der Fig. 1 entnommen werden kann, liegt die Schneide 7 des wendelförmigen Messerblattes 6 auf einer Rotationsfläche, nämlich einem strichpunktiert angedeuteten Kegel 11, dessen Achse mit der Drehachse 4 zusammenfällt. Außerdem begrenzt die Schnittfläche 12 zwischen dem Kegel 11 und dem Führungszylinder 2 die Eingriffsöffnung 9 der Strangführung 1. Die Schneide 7 wird somit während des Umlaufes des Schneidwerkzeuges 3 entlang der Schnittfläche 12 bewegt, was eine vorteilhafte Gegenhalterung für den Messereingriff mit sich bringt.Again Fig. 1 can be removed, the cutting edge 7 of the helical knife blade 6 is located on a surface of revolution, namely a dash-dotted line indicated cones 11, whose axis coincides with the axis of rotation 4. In addition, the cutting surface 12 between the cone 11 and the guide cylinder 2 limits the engagement opening 9 of the strand guide 1. The cutting edge 7 is thus moved along the cutting surface 12 during the rotation of the cutting tool 3, which entails an advantageous counter support for the knife engagement.

Wird ein Gutstrang dem rotierenden Schneidwerkzeug 3 durch die Strangführung 1 mit einer kontinuierlichen Vorschubgeschwindigkeit zugeführt, so wird der Gutstrang durch die Schneide 7 des Messerblattes 6 während der kontinuierlichen Zuführung in einem ziehenden Schnitt durchtrennt, wenn die Umlaufgeschwindigkeit des Schneidwerkzeuges 3 in Abhängigkeit von der Steigung der Schneide 7 so gewählt wird, daß sich der Schneideneingriff mit der Vorschubgeschwindigkeit des Gutstranges bewegt. Mit jeder vollen Umdrehung des Schneidwerkzeuges 3 wird ein vollständiger Trennschnitt ausgeführt, so daß der Gutstrang in Stücke mit einer der Ganghöhe der Schneide 7 entsprechenden Länge fortlaufend geschnitten wird. Um die axiale Strangförderung durch den Messereingriff zu unterstützen, ist die Anschlifffläche 13 der Schneide 7 nicht auf der der Schnittfläche 12 der Strangführung 1 zugekehrten Messerseite vorgesehen, sondern auf der der Schnittfläche 12 abgekehrten Seite des Messerblattes 6.If a Gutstrang the rotating cutting tool 3 fed through the strand guide 1 with a continuous feed rate, the Gutstrang is severed by the cutting edge 7 of the knife blade 6 during the continuous feed in a pulling section when the rotational speed of the cutting tool 3 in dependence on the slope of Cutting edge 7 is selected so that the cutting engagement moves with the feed rate of the Gutstranges. With each full revolution of the cutting tool 3, a complete separation cut is carried out, so that the material strand is cut into pieces with a length corresponding to the pitch of the cutting edge 7 continuously. In order to support the axial extrusion by the knife engagement, the grinding surface 13 of the cutting edge 7 is not on the cutting surface 12 of the strand guide 1 facing knife side provided, but on the cut surface 12 facing away from the knife blade. 6

Als Gutstrang kommen alle mit einem ziehenden Schnitt durchtrennbaren Werkstücke in Frage, beispielsweise Stangen, Profile, Fäden, Fasern, aber auch Stückgut, das vorzugsweise mehrmals durchtrennt werden soll, wobei insbesondere Fäden und Fasern zu einem gemeinsamen Strang zusammengefaßt werden können.As Gutstrang come all with a drawing cut severable workpieces in question, such as rods, profiles, threads, fibers, but also general cargo, which is preferably to be severed several times, in particular threads and fibers can be combined to form a common strand.

Das Ausführungsbeispiel nach den Fig. 3 bis 5 unterscheidet sich von dem nach den Fig. 1 und 2 vor allem dadurch, daß das Schneidwerkzeug 3 zwei Messerblätter 14 aufweist, die jeweils eine um die Drehachse 4 geschraubte Schneide 7 bilden. Die Schneide 7 weist jedoch im Gegensatz zum Ausführungsbeispiel nach den Fig. 1 und 2 keine konstante Steigung auf. Die Messerblätter 14 sind nämlich eben und verlaufen unter einem spitzen Winkel geneigt zur Drehachse 4, wie dies der Fig. 5 entnommen werden kann. Da die Schneiden 7 wiederum auf einem Kegel 11 liegen, weisen die Schneiden 7 einen elliptischen Verlauf auf, der wiederum gewährleistet, daß der Abstand r der Schneiden 7 von der Drehachse 4 entgegen dem Drehsinn 8 zunimmt, wie dies am besten der Fig. 4 entnommen werden kann.The embodiment of the Fig. 3 to 5 different from that after the Fig. 1 and 2 above all, characterized in that the cutting tool 3 has two blade blades 14, each forming a screwed around the axis of rotation 4 cutting edge 7. The cutting edge 7, however, in contrast to the embodiment of the Fig. 1 and 2 no constant slope. The knife blades 14 are namely flat and at an acute angle inclined to the axis of rotation 4, as the Fig. 5 can be removed. Since the cutting edges 7 are in turn on a cone 11, the cutting edges 7 have an elliptical course, which in turn ensures that the distance r of the cutting edges 7 from the rotation axis 4 against the direction of rotation 8 increases, as best of Fig. 4 can be removed.

Die rotationssymmetrisch bezüglich der Drehachse 4 angeordneten Messerblätter 14 wirken mit zwei Strangführungen 1 in Form von Führungszylindern 2 zusammen, wie dies bereits im Zusammenhang mit den Fig. 1 und 2 beschrieben wurde. Die Schneiden 7 können wieder entlang der die Eingriffsöffnungen 9 begrenzenden Schnittflächen 12 zwischen dem Kegel 11 und den Führungszylindern 2 bewegt werden. Es muß allerdings bedacht werden, daß sich aufgrund der ändernden Steigung der Schneiden 7 und wegen der ebenen Messerblätter 14 eine axiale Bewegungskomponente zwischen den Gutsträngen und den Messerblättern 14 ergibt, was eine entsprechende Nachgiebigkeit der Gutstränge in axialer Richtung erfordert, wie dies beispielsweise bei Fäden oder Fasern und den daraus gebildeten Strängen gegeben ist. Die Ausführungsvariante einer erfindungsgemäßen Vorrichtung zum Schneiden von Gutsträngen nach den Fig. 3 bis 5 zeichnet sich somit durch eine besondere Einfachheit hinsichtlich der Konstruktion aus, ist allerdings nur bei bestimmten Werkstoffeigenschaften des Gutstranges einsetzbar. Die durch die Mehrfachanordnung der Messer und der Strangführungen erreichbaren Vorteile hinsichtlich der Schnittleistung und des Unwuchtausgleiches können selbstverständlich unabhängig von den Werkstoffeigenschaften der zu schneidenden Gutstränge ausgenützt werden, wenn die Messer des Schneidwerkzeuges nicht durch ebene, sondern durch wendelförmige Messerblätter entsprechend den Fig. 1 und 2 gebildet werden.The rotationally symmetrical with respect to the axis of rotation 4 arranged knife blades 14 cooperate with two strand guides 1 in the form of guide cylinders 2, as already in connection with the Fig. 1 and 2 has been described. The cutting edges 7 can again be moved along the cutting openings 12 delimiting the engagement openings 12 between the cone 11 and the guide cylinders 2. However, it must be considered that due to the changing slope of the cutting edges 7 and because of the flat blade blades 14 an axial component of motion between the Gutsträngen and the blade blades 14 results, which requires a corresponding flexibility of the Gutstränge in the axial direction, as for example in threads or Fibers and the strands formed therefrom is given. The embodiment of a device according to the invention for cutting Gutsträngen after the Fig. 3 to 5 is characterized by a special simplicity in terms of construction, but is only applicable to certain material properties of the Gutstranges. The achievable by the multiple arrangement of the knives and the strand guides advantages in terms of cutting performance and imbalance compensation can of course be exploited regardless of the material properties of the material strands to be cut, if the blades of the cutting tool not by flat, but by helical knife blades according to the Fig. 1 and 2 be formed.

Claims (6)

  1. Device for cutting an elongated object, comprising an object guide (1) with a guide axis (10) extending in the longitudinal direction of the elongated object and a cutting tool (3) which can be driven about an axis of rotation (4) parallel to the guide axis (10) and at least one knife with a blade (7) extending at least over a peripheral section, disposed helically around the axis of rotation (4), lying on a rotation surface with the axis of rotation (4) as its axis of rotation, the radial distance of the blade (7) from the axis of rotation (4) increasing around its periphery contrary to the direction of rotation at least by an amount corresponding to the maximum cutting depth, characterised in that the elongated object guide (1) consists of a guide cylinder (2) with an engagement opening (9) for the knife which is defined by the cutting surface (12) between the guide cylinder (2) and the rotation surface defined by the blade (7).
  2. Device according to claim 1, characterised in that the blade (7) of the knife comprises a cutting surface (13) on the side lying opposite the engagement opening (9) of the guide cylinder (2).
  3. Device according to claim 1 or 2, characterised in that the knife consists of a helical blade, of which the outer peripheral edge forms the cutting edge (7).
  4. Device according to claim 1 or 2, characterised in that the knife comprises a flat blade (14) inclined at an acute angle relative to the axis of rotation (4) with a cutting edge (7) extending along the outer peripheral edge.
  5. Device according to one of the claims 1 to 4, characterised in that at least two elongated object guides (1) are disposed rotationally symmetrically relative to the axis of rotation (4) of the cutting tool (3).
  6. Device according to claim 5, characterised in that the cutting tool (3) comprises a number of knives arranged rotationally symmetrical relative to each other corresponding to the number of elongated object guides (1).
EP03762346A 2002-07-03 2003-07-02 Device for cutting a bar of material Expired - Lifetime EP1517769B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0099102A AT413349B (en) 2002-07-03 2002-07-03 DEVICE FOR CUTTING A GUARD TRANSPORT
AT9912002 2002-07-03
PCT/AT2003/000183 WO2004004988A1 (en) 2002-07-03 2003-07-02 Device for cutting a bar of material

Publications (2)

Publication Number Publication Date
EP1517769A1 EP1517769A1 (en) 2005-03-30
EP1517769B1 true EP1517769B1 (en) 2008-02-27

Family

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Application Number Title Priority Date Filing Date
EP03762346A Expired - Lifetime EP1517769B1 (en) 2002-07-03 2003-07-02 Device for cutting a bar of material

Country Status (5)

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EP (1) EP1517769B1 (en)
AT (2) AT413349B (en)
AU (1) AU2003243795A1 (en)
DE (1) DE50309261D1 (en)
WO (1) WO2004004988A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1909029A (en) * 1930-08-13 1933-05-16 Ind Patents Corp Slicing machine
US3837249A (en) * 1971-10-13 1974-09-24 Marlen Res Corp Machine for severing meat slabs
US4053004A (en) * 1975-05-12 1977-10-11 The United States Of America As Represented By The Secretary Of Agriculture Helical head comminuting shear
DE9103828U1 (en) * 1991-03-28 1991-05-29 Reifenhaeuser, Uwe, 5232 Flammersfeld, De
IT1258171B (en) * 1992-02-07 1996-02-20 Perini Fabio Spa CUTTING METHOD AND CUTTING MACHINE FOR PAPER ROLLS AND SIMILAR

Also Published As

Publication number Publication date
EP1517769A1 (en) 2005-03-30
AU2003243795A1 (en) 2004-01-23
AT413349B (en) 2006-02-15
ATA9912002A (en) 2005-07-15
WO2004004988A1 (en) 2004-01-15
ATE387294T1 (en) 2008-03-15
DE50309261D1 (en) 2008-04-10

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