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EP1857240B1 - Blade plate arrangement in a cutter head for machining wood or plastic materials - Google Patents

Blade plate arrangement in a cutter head for machining wood or plastic materials Download PDF

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Publication number
EP1857240B1
EP1857240B1 EP06010035A EP06010035A EP1857240B1 EP 1857240 B1 EP1857240 B1 EP 1857240B1 EP 06010035 A EP06010035 A EP 06010035A EP 06010035 A EP06010035 A EP 06010035A EP 1857240 B1 EP1857240 B1 EP 1857240B1
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EP
European Patent Office
Prior art keywords
cutter head
blade plate
cutting edge
knife
blade
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
EP06010035A
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German (de)
French (fr)
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EP1857240A1 (en
Inventor
Domenico De Marco
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Utensilea Sas
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Utensilea Sas
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Utensilea Sas filed Critical Utensilea Sas
Priority to DK06010035T priority Critical patent/DK1857240T3/en
Priority to ES06010035T priority patent/ES2317363T3/en
Priority to EP06010035A priority patent/EP1857240B1/en
Priority to AT06010035T priority patent/ATE411882T1/en
Priority to DE502006001894T priority patent/DE502006001894D1/en
Priority to PT06010035T priority patent/PT1857240E/en
Publication of EP1857240A1 publication Critical patent/EP1857240A1/en
Application granted granted Critical
Publication of EP1857240B1 publication Critical patent/EP1857240B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G13/00—Cutter blocks; Other rotary cutting tools
    • B27G13/02—Cutter blocks; Other rotary cutting tools in the shape of long arbors, i.e. cylinder cutting blocks
    • B27G13/04—Securing the cutters by mechanical clamping means

Definitions

  • the invention relates to a knife plate assembly in a cutter head for wood and plastics processing, according to the preamble of claim 1 (see, for example CH-A-403 278 ).
  • Knife heads for wood and plastic processing are known to have a cutter head base on the circumference at equal angular intervals receiving grooves are incorporated, which serve to receive a respective blade plate and the associated holding and clamping device for the blade plate.
  • Knife plate and knife holder have in this case positively cooperating means for securing the knife plate against radial outflung Messcrplatte under the effect of centrifugal force in the wood and plastic processing. commonly used high speeds on.
  • Such form-fitting means may be dowel pins which engage in openings of the knife plate and may be inserted in a back plate supporting the knife plate or in a support surface of the receiving groove of the knife head body, or may be pins or other stop members incorporated in the side edge portions of the knife plate Recesses intervene.
  • a stepwise adjustability of the blade plates in the receiving groove of the cutter head which can be realized by the fact that dowel pins or other stop elements on the cutter head body or a back plate, each with a row on the blade plate co-operate with correspondingly spaced counter-elements, or that a knife plate receiving the back plate and a cooperating support surface in the cutter head body are each provided with a parallel to the cutter head teeth and thus allow a gradual radial adjustability of the position of the blade plate.
  • the invention is therefore the object of a knife head in such a way that while maintaining simple radial positioning of the blade plate in the cutter head body and while maintaining the positioning accuracy greater versatility of the regrinding of the blade plates is possible.
  • the blade plate at the two ends of its length, ie in the region of its side edges, each one ground from the Messerplattenschneidkante ago recessed and a fixed distance from the blade cutting edge having stop surface, and on the cutter head body are cooperating with these two stop surfaces of the blade plate arranged radial stops stationary.
  • the knife plate holding device comprises a spring member which biases the knife plate radially outward, so that it is always biased against the stationary stops with the two abutment surfaces formed at their mutual ends.
  • the stops serve at the same time the definition of the blade plate in the direction of the blade head axis.
  • the spring member is preferably formed as a leaf spring or the like., Which is supported on the one hand in the region of the groove bottom of the receiving groove and on the other hand against the lower edge, that presses the cutting edge opposite longitudinal edge of the blade plate.
  • the two opposite the cutting edge recessed stop surfaces are mitgeschliffen quasi as part of the cutting edge profile both during initial grinding of the knife edge as well as in each regrinding, so that the fixed distance relationship between the stop surfaces and the actual cutting edge always remains the same.
  • the abutment surfaces are expediently sanded with the same inclination to the knife plate main plane as the actual cutting edge itself.
  • the stops arranged on the cutter head then expediently have complementary inclined oblique surfaces as abutment surfaces.
  • Fig. 1 shows a section of a cutter head according to the invention.
  • receiving grooves 2 are provided for receiving in each case a knife plate 3 with an associated clamping body 4 in usually distributed on the circumference.
  • a number provided in the present embodiment of three clamping wedges 5, which are each tensioned by an associated clamping screw 6 and produce a compressive force on the clamping body 4 via cooperating wedge surfaces on the clamping wedge 5 and the clamping body 4, whereby the blade plate 3 is pressed against a support surface formed by the corresponding wall of the receiving groove 2.
  • the details of the tensioning wedges 5, clamping screws 6 and the clamping body 4 formed clamping mechanism are not interested in this case.
  • Fig. 3 shows in the view of the knife plate 3, which has a cutting edge 31, a lower edge 32, which forms the cutting edge opposite longitudinal edge, and two side edges 33 at the both ends of the elongated blade plate-
  • the blade plate 3 may also in the course of their length one of the Lower edge 32 ago machined groove 34 which, with a arranged in the cutter head body stopper pin 11 (in Fig. 2 visible) cooperates, which accomplishes a positioning and fixing of the blade plate 3 in the axial direction of the cutter head.
  • FIG. 3 shows, in the region of the two side edges 33 at both longitudinal ends of the blade plate 3 respectively from the cutting edge 31 ago a stop surface 35 ground, which is set back relative to the cutting edge 31 by a certain fixed distance.
  • These abutment surfaces 35 may be ground obliquely in the same way as the cutting edge 31. This is in Fig. 3 not visible, but is in Fig. 1 clearly visible.
  • Fig. 1 and 2 further show stop elements 7 are arranged on the cutter head, which are fixed by means of screws 8 in the cutter head body, and cooperate with said abutment surfaces 35 at the two side edge portions 33 of the blade plate.
  • the stop elements 7 have a corresponding to the oblique polished section of the cutting edge 31 and the stop surfaces 35 adapted oblique shape.
  • the stop elements 7 are accurately positioned, their position is defined in each case by a dowel pin 9, the in Fig. 1 is visible.
  • Fig. 3 As in further Fig. 1 is visible, sits in the Nutgrund Scheme the receiving groove 2, a spring 10, the Fig. 3 is shown together with the blade plate, so that the shape of the spring Fig. 3 is apparent.
  • This spring 10 is according to Fig. 3 formed as a leaf spring, which has a downwardly curved central bottom portion and from there sideways slightly upwardly extending, on both sides of the bottom portion extending leg. The arc portion of the spring 10 is supported on the groove bottom of the receiving groove 2, while the two legs of the spring 10 abut against the lower edge 32 of the blade plate 3.
  • This spring 10 presses the blade plate 3 each radially outward, in Fig. 1 So up, so that the knife plate is pressed with its two stop faces located at the ends 35 against the stop elements 7 by the spring 10.
  • the cutting edge 1 If the cutting edge 1 is dull, worn or damaged by breakouts, it can be reground as needed.
  • the abutment surfaces 35 thereby form virtually a part of the cutting edge 31 insofar as it is ground in the manufacture of the blade plate with the cutting edge 31 and regrind the regrind of the cutting plate, so that the rigid distance relationship between the cutting edge 31 and the return offset of the Stop surfaces 35 is always maintained identical.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Details Of Cutting Devices (AREA)
  • Knives (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The knife head has a base body which has number of receiving grooves at the periphery and form-fit elements which are arranged for radial positioning of the knife plate (3) at the knife plate ends. The form-fit element has stopper elements that are arranged in fixed position at the knife plate ends and at the knife head base body and reset at a distance concerning the knife plate cutting edge (31) .The elements has contact surfaces (35) that interact with the stopper elements and engage with the cutting edge of the knife plate.

Description

Die Erfindung betrifft eine Messerplattenanordnung in einem Messerkopf für die Holz- und Kunststoffbearbeitung, gemäß dem Oberbegriff des Anspruchs 1 (siehe z.B. CH-A-403 278 ).The invention relates to a knife plate assembly in a cutter head for wood and plastics processing, according to the preamble of claim 1 (see, for example CH-A-403 278 ).

Messerköpfe für die Holz- und Kunststoffbearbeitung weisen bekanntermaßen einen Messerkopfgrundkörper auf, an dessen Umfang mit gleichen Winkelabständen Aufnahmenuten eingearbeitet sind, die zur Aufnahme jeweils einer Messerplatte und der zugehörigen Halte- und Spannvorrichtung für die Messerplatte dienen.Knife heads for wood and plastic processing are known to have a cutter head base on the circumference at equal angular intervals receiving grooves are incorporated, which serve to receive a respective blade plate and the associated holding and clamping device for the blade plate.

Messerplatte und Messerplattenhalterung weisen dabei miteinander formschlüssig zusammenwirkende Mittel zur Sicherung der Messerplatte gegen radiales Herausfliegen der Messcrplatte unter der Wirkung der Fliehkraft bei den für die Holz- und Kunststoffbearbeitung . üblicherweise angewendeten hohen Drehzahlen auf. Solche Formschlussmittel können Passstifte sein, die in Öffnungen der Messerplatte eingreifen und in einer die Messerplatte abstützenden Rückenplatte oder in einer Stützfläche der Aufnahmenut des Messerkopfgrundkörpers eingesetzt sein können, oder es kann sich um Stifte oder andere Anschlagelemente handeln, die in an den Seitenkantenbereichen der Messerplatte eingearbeitete Aussparungen eingreifen.Knife plate and knife holder have in this case positively cooperating means for securing the knife plate against radial outflung Messcrplatte under the effect of centrifugal force in the wood and plastic processing. commonly used high speeds on. Such form-fitting means may be dowel pins which engage in openings of the knife plate and may be inserted in a back plate supporting the knife plate or in a support surface of the receiving groove of the knife head body, or may be pins or other stop members incorporated in the side edge portions of the knife plate Recesses intervene.

Damit ein Nachschleifen abgenutzter Messerplattenschneiden möglich ist, ist dabei oft eine stufenweise Verstellbarkeit der Messerplatten in der Aufnahmenut des Messerkopfs vorgesehen, die dadurch realisiert sein kann, daß Passstifte oder andere Anschlagelemente am Messerkopfgrundkörper oder einer Rückenplatte mit jeweils einer Reihe an der Messerplatte mit entsprechenden Abständen angeordneten Gegenelementen zusammenwirken, oder daß eine die Messerplatte aufnehmende Rückenplatte und eine damit zusammenwirkende Stützfläche im Messerkopfgrundkörper jeweils mit einer zur Messerkopfachse parallelen Verzahnung versehen sind und so eine stufenweise radiale Verstellbarkeit der Position der Messerplatte ermöglichen.For a regrinding of worn knife blade cutting is possible, it is often provided a stepwise adjustability of the blade plates in the receiving groove of the cutter head, which can be realized by the fact that dowel pins or other stop elements on the cutter head body or a back plate, each with a row on the blade plate co-operate with correspondingly spaced counter-elements, or that a knife plate receiving the back plate and a cooperating support surface in the cutter head body are each provided with a parallel to the cutter head teeth and thus allow a gradual radial adjustability of the position of the blade plate.

Diese bekannten Anordnungen haben zunächst alle den Nachteil, daß ein Nachschleifen verschlissener Messerplattenkanten nur in entsprechenden Stufen möglich ist. Eine stumpf gewordene oder verschlissene Messerplattenschneidkante muß also um ein Maß zurückgeschliffen werden, das der Distanz eines Verstellschritts entspricht. Das notwendige Maß des Nachschleifens der Messerplatte kann dabei ein Vielfaches dessen betragen, was eigentlich zum Nachschärfen der Messerplattenschneidkante notwendig wäre. Dies bedeutet nicht nur unnötigen Verschleiß der Messerplatte, die je nach Anzahl der verfügbaren Verstellstufen nur einmal oder zweimal, vielleicht auch dreimal nachgeschliffen werden kann, während bei einem jeweils nur bedarfsweisen Nachschleifen ein doppelt oder dreimal so häufiges Nachschleifen und damit eine doppelte oder dreifache Standzeit der Messerplatte möglich wäre, und zum anderen ist der jeweilige Nachschleifaufwand um ein Mehrfaches größer, als er sein müsste. Wenn die Verstellbarkeit dadurch hergestellt ist, daß eine Rückenplatte mit Verzahnung im Messerkopfgrundkörper verstellbar ist, kommt noch der Nachteil hinzu, daß dann die Möglichkeit des Nachschleifens noch durch die Rückenplatte stark eingeschränkt ist.These known arrangements initially all have the disadvantage that a regrinding of worn knife edge edges is possible only in appropriate stages. A dulled or worn knife blade cutting edge must therefore be ground back by a measure that corresponds to the distance of an adjustment step. The necessary degree of re-sharpening of the knife plate can be a multiple of what would actually be necessary for re-sharpening the cutting edge cutting edge. This not only means unnecessary wear of the blade plate, which can be reground only once or twice, maybe three times, depending on the number of available adjustment, while in a need only resharpening a twice or three times more frequent regrinding and thus a double or triple life of Knife plate would be possible, and on the other hand, the respective Nachschleifaufwand is many times greater than it should be. If the adjustability is made by a back plate with teeth in the cutter head body is adjustable, there is the additional disadvantage that then the possibility of regrinding is still severely limited by the back plate.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Messerkopf so auszubilden, daß unter Beibehaltung einfacher radialer Positionierbarkeit der Messerplatte im Messerkopf grundkörper sowie unter Beibehaltung der Positioniergenauigkeit eine größere Vielseitigkeit des Nachschleifens der Messerplatten ermöglicht wird.The invention is therefore the object of a knife head in such a way that while maintaining simple radial positioning of the blade plate in the cutter head body and while maintaining the positioning accuracy greater versatility of the regrinding of the blade plates is possible.

Diese Aufgabe wird gemäß der Erfindung durch die im Anspruch 1 angegebene Anordnung gelöst.This object is achieved according to the invention by the arrangement specified in claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.

Bei der erfindungsgemäßen Anordnung weist die Messerplatte an den beiden Enden ihrer Länge, also im Bereich ihrer Seitenkanten, jeweils eine von der Messerplattenschneidkante her eingeschliffene zurückgesetzte und eine feste Distanz von der Messerplattenschneidkante aufweisende Anschlagfläche auf, und am Messerkopfgrundkörper sind mit diesen beiden Anschlagflächen der Messerplatte zusammenwirkende radiale Anschläge ortsfest angeordnet. Die Messerplattenhaltevorrichtung umfasst ein Federorgan, welches die Messerplatte radial auswärts vorspannt, so daß sie mit den beiden an ihren beiderseitigen Enden gebildeten Anschlagflächen stets gegen die ortsfesten Anschläge vorgespannt wird. Die Anschläge dienen dabei gleichzeitig der Festlegung der Messerplatte in Richtung der Messerkopfachse. Das Federorgan ist dabei vorzugsweise als Blattfeder oder dergl. ausgebildet, das sich einerseits im Bereich des Nutgrunds der Aufnahmenut abstützt und andererseits gegen die Unterkante, also die der Schneidkante gegenüberliegende Längskante der Messerplatte drückt.In the arrangement according to the invention, the blade plate at the two ends of its length, ie in the region of its side edges, each one ground from the Messerplattenschneidkante ago recessed and a fixed distance from the blade cutting edge having stop surface, and on the cutter head body are cooperating with these two stop surfaces of the blade plate arranged radial stops stationary. The knife plate holding device comprises a spring member which biases the knife plate radially outward, so that it is always biased against the stationary stops with the two abutment surfaces formed at their mutual ends. The stops serve at the same time the definition of the blade plate in the direction of the blade head axis. The spring member is preferably formed as a leaf spring or the like., Which is supported on the one hand in the region of the groove bottom of the receiving groove and on the other hand against the lower edge, that presses the cutting edge opposite longitudinal edge of the blade plate.

Die beiden gegenüber der Schneidkante zurückgesetzten Anschlagflächen werden sowohl beim Erstschleifen der Messerplattenkante wie auch bei jedem Nachschleifen quasi als Bestandteil des Schneidkantenprofils mitgeschliffen, so daß die feste abstandsmäßige Beziehung zwischen den Anschlagflächen und der eigentlichen Schneidkante stets identisch aufrechterhalten bleibt. Dabei werden die Anschlagflächen zweckmäßigerweise mit der gleichen Neigung zur Messerplattenhauptebene angeschliffen wie die eigentliche Schneidkante selbst. Die am Messerkopf angeordneten Anschläge haben dann zweckmäßigerweise komplementär geneigte Schrägflächen als Anschlagflächen.The two opposite the cutting edge recessed stop surfaces are mitgeschliffen quasi as part of the cutting edge profile both during initial grinding of the knife edge as well as in each regrinding, so that the fixed distance relationship between the stop surfaces and the actual cutting edge always remains the same. The abutment surfaces are expediently sanded with the same inclination to the knife plate main plane as the actual cutting edge itself. The stops arranged on the cutter head then expediently have complementary inclined oblique surfaces as abutment surfaces.

Auf diese Weise ist ein Nachschleifen stumpfer, verschlissener oder durch Ausbrüche beschädigter Messerplattenschneidkanten jeweils nach Bedarf möglich, und die Schneidkante braucht jeweils nicht mehr als notwendig nachgeschliffen zu werden- Das Nachschleifen der Messerplatten kann außerhalb des Messerkopfs erfolgen, und beim Einsetzen der nachgeschliffenen Messerplatten in den Messerkopf ergibt sich stets genau die richtige radiale Positionierung der Schneidkanten der Messerplatte, ohne daß besondere Positionierungsmaßnahmen notwendig sind. Dabei ist es auch ausgeschlossen, daß, was bei bisherigen Systemen mit stufiger Verstellbarkeit der Messerplatten oder Messerplattenträger vorkommen kann, daß bei dem Einsetzen oder Wiedereinsetzen von Messerplatten in einen Messerkopf eine Messerplatte versehentlich falsch positioniert wird.In this way, a regrinding blunt, worn or broken out knife edge cutting edges is possible as needed, and the cutting edge need not be reground more than necessary- The re-sharpening of the knife plates can be done outside of the cutter head, and when inserting the reground knife plates in the Milling head always results in exactly the correct radial positioning of the cutting edges of the blade plate, without special positioning measures are necessary. It is also excluded that, which may occur in previous systems with gradual adjustability of the knife plates or knife plate carrier that when inserting or reinserting knife plates in a knife head a knife plate is mistakenly positioned incorrectly.

Ein Ausführungsbeispiel der Erfindung wird nachstehend unter Bezugnahme auf die anliegenden Zeichnungen mehr im einzelnen beschrieben, in denen zeigt:

Fig. 1
eine in Richtung der Messerkopfachse gesehene abgebrochene Ansicht eines eine eingesetzte Messerplatte aufweisenden Umfangsbereichs eines Messerkopf nach der Erfindung,
Fig. 2
eine radiale Draufsicht auf den in Fig. 1 gezeigten Bereich eines Messerkopfs, und
Fig. 3
eine Ansicht einer Messerplatte und einer dieser zugeordneten Vorspannfeder.
An embodiment of the invention will be described below in more detail with reference to the accompanying drawings, in which:
Fig. 1
a broken-away view, viewed in the direction of the blade head axis, of a peripheral region of a cutter head according to the invention having an inserted blade plate,
Fig. 2
a radial plan view of the in Fig. 1 shown area of a cutter head, and
Fig. 3
a view of a blade plate and a biasing spring associated therewith.

Fig. 1 zeigt einen Ausschnitt aus einem Messerkopf nach der Erfindung. In einem Messerkopfgrundkörper 1 sind in üblicherweise am Umfang verteilt Aufnahmenuten 2 zur Aufnahme jeweils einer Messerplatte 3 mit einem zugehörigen Spannkörper 4 vorgesehen. Wie die Fig. 1 und 2 zeigen, sind entlang der Länge der Messerplatte 3 eine Anzahl, beim vorliegenden Ausführungsbeispiel von drei Spannkeilen 5 vorgesehen, die jeweils mittels einer zugehörigen Spannschraube 6 spannbar sind und über miteinander zusammenwirkende Keilflächen am Spannkeil 5 und am Spannkörper 4 eine Druckkraft auf den Spannkörper 4 erzeugen, wodurch die Messerplatte 3 an eine durch die entsprechende Wand der Aufnahmenut 2 gebildete Stützfläche gepresst wird. Die Einzelheiten des aus Spannkeilen 5, Spannschrauben 6 und dem Spannkörper 4 gebildeten Spannmechanismus interessieren vorliegend nicht. Fig. 1 shows a section of a cutter head according to the invention. In a cutter head main body 1 receiving grooves 2 are provided for receiving in each case a knife plate 3 with an associated clamping body 4 in usually distributed on the circumference. As the Fig. 1 and 2 show are along the length of the blade plate 3 a number, provided in the present embodiment of three clamping wedges 5, which are each tensioned by an associated clamping screw 6 and produce a compressive force on the clamping body 4 via cooperating wedge surfaces on the clamping wedge 5 and the clamping body 4, whereby the blade plate 3 is pressed against a support surface formed by the corresponding wall of the receiving groove 2. The details of the tensioning wedges 5, clamping screws 6 and the clamping body 4 formed clamping mechanism are not interested in this case.

Fig. 3 zeigt in der Ansicht die Messerplatte 3, die eine Schneidkante 31, eine Unterkante 32, welche die der Schneidkante gegenüberliegende Längskante bildet, und zwei Seitenkanten 33 an den beiderseitigen Enden der länglichen Messerplatte aufweist- Die Messerplatte 3 kann außerdem im Verlauf ihrer Länge eine von der Unterkante 32 her eingearbeitete Nut 34 aufweisen, die mit einem im Messerkopfgrundkörper angeordneten Anschlagstift 11 (in Fig. 2 sichtbar) zusammenwirkt, der eine Positionierung und Festlegung der Messerplatte 3 in Axialrichtung des Messerkopfs bewerkstelligt. Fig. 3 shows in the view of the knife plate 3, which has a cutting edge 31, a lower edge 32, which forms the cutting edge opposite longitudinal edge, and two side edges 33 at the both ends of the elongated blade plate- The blade plate 3 may also in the course of their length one of the Lower edge 32 ago machined groove 34 which, with a arranged in the cutter head body stopper pin 11 (in Fig. 2 visible) cooperates, which accomplishes a positioning and fixing of the blade plate 3 in the axial direction of the cutter head.

Wie weiter Fig. 3 zeigt, ist im Bereich der beiden Seitenkanten 33 an beiden Längsenden der Messerplatte 3 jeweils von der Schneidkante 31 her eine Anschlagfläche 35 angeschliffen, die bezüglich der Schneidkante 31 um eine gewisse feste Distanz zurückgesetzt ist. Diese Anschlagflächen 35 können in der gleichen Weise schräg geschliffen sein wie die Schneidkante 31. Dies ist in Fig. 3 nicht sichtbar, ist aber in Fig. 1 gut zu erkennen.Like next Fig. 3 shows, in the region of the two side edges 33 at both longitudinal ends of the blade plate 3 respectively from the cutting edge 31 ago a stop surface 35 ground, which is set back relative to the cutting edge 31 by a certain fixed distance. These abutment surfaces 35 may be ground obliquely in the same way as the cutting edge 31. This is in Fig. 3 not visible, but is in Fig. 1 clearly visible.

Wie die Fig. 1 und 2 weiter zeigen, sind am Messerkopf Anschlagelemente 7 angeordnet, die mittels Schrauben 8 im Messerkopfgrundkörper befestigt sind, und mit den genannten Anschlagflächen 35 an den beiden Seitenkantenbereichen 33 der Messerplatte zusammenwirken. Wie man in Fig. 1 sieht, haben die Anschlagelemente 7 eine entsprechend dem schrägen Anschliff der Schneidkante 31 und der Anschlagflächen 35 angepaßte schräge Form. Damit die Anschlagelemente 7 exakt positioniert sind, ist ihre Position jeweils durch einen Passstift 9 definiert, der in Fig. 1 sichtbar ist.As the Fig. 1 and 2 further show stop elements 7 are arranged on the cutter head, which are fixed by means of screws 8 in the cutter head body, and cooperate with said abutment surfaces 35 at the two side edge portions 33 of the blade plate. How to get in Fig. 1 sees, the stop elements 7 have a corresponding to the oblique polished section of the cutting edge 31 and the stop surfaces 35 adapted oblique shape. Thus, the stop elements 7 are accurately positioned, their position is defined in each case by a dowel pin 9, the in Fig. 1 is visible.

Wie weiter in Fig. 1 sichtbar ist, sitzt im Nutgrundbereich der Aufnahmenut 2 eine Feder 10, die in Fig. 3 zusammen mit der Messerplatte dargestellt ist, so daß die Form der Feder aus Fig. 3 ersichtlich ist. Diese Feder 10 ist gemäß Fig. 3 als Blattfeder ausgebildet, die einen nach unten gewölbten mittigen Bodenbereich und von da aus seitwärts leicht nach oben verlaufende, sich beiderseits des Bodenbereichs erstreckende Schenkel hat. Der Bogenbereich der Feder 10 stützt sich am Nutgrund der Aufnahmenut 2 ab, während die beiden Schenkel der Feder 10 an der Unterkante 32 der Messerplatte 3 anliegen. Diese Feder 10 drückt die Messerplatte 3 jeweils radial nach außen, in Fig. 1 also nach oben, so daß durch die Feder 10 die Messerplatte mit ihren beiden an den Enden befindlichen Anschlagflächen 35 gegen die Anschlagelemente 7 gedrückt wird.As in further Fig. 1 is visible, sits in the Nutgrundbereich the receiving groove 2, a spring 10, the Fig. 3 is shown together with the blade plate, so that the shape of the spring Fig. 3 is apparent. This spring 10 is according to Fig. 3 formed as a leaf spring, which has a downwardly curved central bottom portion and from there sideways slightly upwardly extending, on both sides of the bottom portion extending leg. The arc portion of the spring 10 is supported on the groove bottom of the receiving groove 2, while the two legs of the spring 10 abut against the lower edge 32 of the blade plate 3. This spring 10 presses the blade plate 3 each radially outward, in Fig. 1 So up, so that the knife plate is pressed with its two stop faces located at the ends 35 against the stop elements 7 by the spring 10.

Ist die Schneidkante 1 stumpf, verschlissen oder durch Ausbrüche beschädigt, kann sie nach Bedarf nachgeschliffen werden. Die Anschlagflächen 35 bilden dabei quasi einen Bestandteil der Schneidkante 31 insofern, als sie bei der Herstellung der Messerplatte mit der Schneidkante 31 angeschliffen wird und beim Nachschleifen der Schneidplatte jeweils mit nachgeschliffen wird, so daß die starre distanzmäßige Beziehung zwischen der Schneidkante 31 und dem Rückversatz der Anschlagflächen 35 stets identisch aufrechterhalten bleibt. Wenn die nachgeschliffene Messerplatte wieder in den Messerkopf eingesetzt wird, nimmt die Schneidkante 31 der Messerplatte, ganz egal, um welches Maß die Schneidkante nachgeschliffen worden ist, durch das Zusammenwirken der Anschlagflächen 35 und der Anschlagelemente 7 aufgrund der Vorspannung durch die Feder 10 stets die richtige radiale Position ein, die Schneidkante 31 liegt also automatisch stets in der richtigen exakten Axialposition, und in dieser Position kann das Spannen der Messerplatte mittels des Spannkörpers 4 und den Spannkeilen 5 erfolgen.If the cutting edge 1 is dull, worn or damaged by breakouts, it can be reground as needed. The abutment surfaces 35 thereby form virtually a part of the cutting edge 31 insofar as it is ground in the manufacture of the blade plate with the cutting edge 31 and regrind the regrind of the cutting plate, so that the rigid distance relationship between the cutting edge 31 and the return offset of the Stop surfaces 35 is always maintained identical. When the reground knife plate is reinstalled in the cutterhead is, the cutting edge 31 of the blade plate, no matter what measure the cutting edge has been reground, by the interaction of the stop surfaces 35 and the stop elements 7 due to the bias of the spring 10 is always the correct radial position, the cutting edge 31 is thus automatically always in the correct exact axial position, and in this position, the clamping of the blade plate by means of the clamping body 4 and the clamping wedges 5 done.

Claims (7)

  1. Cutter head for machining wood or plastics material, with a cutter head basic element (1) which has at its circumference a number of receiving grooves (2) into each of which an elongate blade plate (3) is inserted and clamped by means of a tensioning mechanism (4, 5, 6), and interlocking means being provided for axially and radially securing the blade plate (3) in the cutter head basic element,
    characterized in that the interlocking elements comprise for radially positioning the blade plate (3) stop surfaces (35) which are arranged at the ends of the blade plates, set back with respect to the cutting edge (31) of the blade plate by a specific fixed distance, and each ground in conjunction with the cutting edge, and stop elements (7) which interact therewith and are arranged on the cutter head basic element in a fixed position, and in that at least one spring member (10), which radially outwardly prestresses the blade plate (3) in the receiving groove (2), is provided.
  2. Cutter head according to claim 1, wherein the stop surfaces (35) of the blade plate (3) are ground at the same angle as the surface of the cutting edge and the stop elements (7) have stop surfaces running at a corresponding angle.
  3. Cutter head according to claim 1 or 2, wherein the stop elements (7) are each positioned on the cutter head basic element (1) by means of at least one alignment pin (8).
  4. Cutter head according to one of claims 1 to 3, wherein the spring member (10) is a spring element arranged between the groove base of the receiving groove (2) and the lower edge (32) of the blade plate (3).
  5. Cutter head according to claim 4, wherein the spring element is configured as a leaf spring.
  6. Cutter head according to claim 4 or 5, wherein the spring element has an arched region resting on the groove base of the receiving groove (2) and legs which run in the shape of a V on both sides of said arched region and rest on the lower edge (32) of the blade plate (3).
  7. Cutter head according to one of claims 1 to 6, wherein the means for axially securing the blade plate (3) are formed by an alignment pin (11) arranged on the cutter head basic element (1) and by a groove (34) which is worked into the lower edge region of the blade plate and with which the alignment pin (11) engages.
EP06010035A 2006-05-16 2006-05-16 Blade plate arrangement in a cutter head for machining wood or plastic materials Active EP1857240B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DK06010035T DK1857240T3 (en) 2006-05-16 2006-05-16 Blade device in a cutting head for machining wood and plastic
ES06010035T ES2317363T3 (en) 2006-05-16 2006-05-16 DISPOSAL OF BLADE PLATES IN A KNIFE HOLDER HEAD FOR WOOD AND METAL MACHINING.
EP06010035A EP1857240B1 (en) 2006-05-16 2006-05-16 Blade plate arrangement in a cutter head for machining wood or plastic materials
AT06010035T ATE411882T1 (en) 2006-05-16 2006-05-16 KNIFE PLATE ARRANGEMENT IN A KNIFE HEAD FOR WOOD AND PLASTIC PROCESSING
DE502006001894T DE502006001894D1 (en) 2006-05-16 2006-05-16 Knife plate arrangement in a cutterhead for wood and plastics processing
PT06010035T PT1857240E (en) 2006-05-16 2006-05-16 Blade plate arrangement in a cutter head for machining wood or plastic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06010035A EP1857240B1 (en) 2006-05-16 2006-05-16 Blade plate arrangement in a cutter head for machining wood or plastic materials

Publications (2)

Publication Number Publication Date
EP1857240A1 EP1857240A1 (en) 2007-11-21
EP1857240B1 true EP1857240B1 (en) 2008-10-22

Family

ID=37102367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06010035A Active EP1857240B1 (en) 2006-05-16 2006-05-16 Blade plate arrangement in a cutter head for machining wood or plastic materials

Country Status (6)

Country Link
EP (1) EP1857240B1 (en)
AT (1) ATE411882T1 (en)
DE (1) DE502006001894D1 (en)
DK (1) DK1857240T3 (en)
ES (1) ES2317363T3 (en)
PT (1) PT1857240E (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH709488A1 (en) 2014-04-14 2015-10-15 Oertli Werkzeuge Ag Tool head and method for inserting and clamping a cutting board and cutting board.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH403278A (en) * 1961-01-07 1965-11-30 Wilhelm Grupp Werkzeug Und Mas Knife shaft
DE8914809U1 (en) * 1989-12-16 1990-02-15 Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld Knife head
DE4334852C2 (en) * 1993-10-13 1996-10-02 Karl Zinner Fuses for cutting knives used in the recesses of a high-speed rotating tool carrier body

Also Published As

Publication number Publication date
EP1857240A1 (en) 2007-11-21
DK1857240T3 (en) 2009-03-02
ES2317363T3 (en) 2009-04-16
PT1857240E (en) 2009-01-29
DE502006001894D1 (en) 2008-12-04
ATE411882T1 (en) 2008-11-15

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