EP2422941A1 - Cutting blade with cornerless non-circular central recess - Google Patents
Cutting blade with cornerless non-circular central recess Download PDFInfo
- Publication number
- EP2422941A1 EP2422941A1 EP11178248A EP11178248A EP2422941A1 EP 2422941 A1 EP2422941 A1 EP 2422941A1 EP 11178248 A EP11178248 A EP 11178248A EP 11178248 A EP11178248 A EP 11178248A EP 2422941 A1 EP2422941 A1 EP 2422941A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive shaft
- driver
- recess
- disc
- central recess
- 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.)
- Granted
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Classifications
-
- 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
- B26D1/14—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 circular cutting member, e.g. disc cutter
- B26D1/143—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 circular cutting member, e.g. disc cutter rotating about a stationary axis
- B26D1/1435—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 circular cutting member, e.g. disc cutter rotating about a stationary axis for thin material, e.g. for sheets, strips or the like
-
- 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
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D7/2614—Means for mounting the cutting member
- B26D7/2621—Means for mounting the cutting member for circular cutters
Definitions
- Such cutting discs are known in many forms, the cutting discs, seen in plan view, differ essentially by their diameter, the shape of the central recess and the possible presence of further recesses.
- the central recess As a circular recess.
- the central recess can - depending on the configuration - be relatively small or relatively large.
- a purely circular Mittenaus strictlyung does not allow a rotationally fixed connection to the drive shaft. Therefore, additional measures have been taken in the prior art cutting wheels to transfer the torque from the drive shaft to the cutter disk.
- the number of further holes or recesses varies. In some cases, only a single such recess or hole is present. In other cases, the number of holes or recesses is two. Also more than two such Holes or recesses are known. Sometimes, up to six such recesses or holes are present.
- central recess substantially circular, but, starting from the per se circular recess, at least one radially outwardly facing U-shaped recess is arranged.
- the number of U-shaped recesses varies again. Minimal, a single such recess is present. There are also embodiments with more than one such U-shaped recess, for example with four such recesses.
- the prior art knife discs are often made of cemented carbide or ceramic. Both carbide and ceramic are relatively brittle and brittle. In operation, therefore, it often happens that the blade breaks and must be replaced by a new blade.
- the object of the present invention is to design a cutting disc of the type mentioned in such a way that the risk of breakage is reduced.
- the center recess of a knife disc of the type mentioned as cornerless, but not circular Mittenausinstituung form, so that the blade disc is fixed in rotation on the drive shaft after plugging on the driver.
- the contour of the central recess is a concavo-convex or plano-convex curve.
- the contour of the central recess is a purely convex curve, for example an ellipse or an oval.
- the central recess is not circular, a distance varies from the boundaries of the central recess opposite the axis of rotation.
- the maximum distance of such limits is 70% to 80% of an outer diameter of the cutter disk.
- a minimum distance of such boundaries is preferably 40% to 70% of the outer diameter.
- the central recess is arranged centrically to the axis of rotation of the drive shaft.
- the center recess in this case has a periodicity in the direction of rotation of the drive shaft.
- the central recess is the only recess of the knife disc. This is in particular preferable to manufacture and also reduces the risk of breakage even further.
- the knife disc can in principle consist of any material. Preferably, it consists of metal - in particular tool steel or carbide - and / or ceramic.
- the present invention further relates to a drive shaft for a knife wheel of the type described above, wherein the drive shaft has a driver whose outer contour corresponds to the center recess of the cutter disk.
- the present invention further relates to a driver for a drive shaft, wherein the driver has a central recess with which the driver can be plugged onto a drive shaft, wherein the driver has an outer contour which corresponds to the center recess of a cutter disk according to the invention.
- the cutter disk 1 is usually relatively thin.
- a thickness d of the cutter disk 1 is usually between 1 millimeter and 4 millimeters, often less than 2.5 millimeters.
- the cutter disk 1 is generally circular on its outer circumference 3.
- An outer diameter D of the cutter disk 1 is generally well above 10 cm, for example 20 cm to 35 cm.
- the cutter disk 1 has on its outer circumference 3 a cutting edge 4 which rotates along the outer circumference 3.
- the cutting edge 4 can - see FIG. 3 - Be designed as a V-shaped cutting edge 4.
- the cutting edge 4 - see FIG. 4 - have a steep desk shape.
- the knife disc 1 has a central recess 5. Due to the presence of the central recess 5, the knife disc 1 can be plugged onto a drive shaft 6. It is placed there on a driver 7 of the drive shaft 6. About the driver 7, the cutter disk 1 is rotatable about a rotation axis 8 of the drive shaft 6.
- the central recess 5 is - see in particular FIG. 2 - Although designed as a "round”, ie cornerless center recess 5. But it is not designed as a circular Mittenausnaturalung 5. It is therefore fixed in rotation on the drive shaft 6 after plugging on the driver 7, even if it still has to be secured axially.
- the center recess 5 can - see purely by way of example FIG. 5 - Be concave-convex.
- the outer contour of the central recess 5 consists of 4 convex semicircles, which merge into each other via 4 concave quadrants.
- the radii r of the semicircles are equal to each other.
- the radii r 'of the quarter circles are equal to each other.
- even radii of semicircles are equal to radii of quarter circles.
- the - in the present case common - radius r, r 'of the half and quarter circles is preferably about 1/8 of the diameter D of the cutter disk. 1
- the outer contour of the central recess 5 is formed as a plano-convex curve, ie as a curve consisting of straight sections, which merge into one another via convex sections.
- FIG. 6 shows an example of such a possible embodiment.
- the radius r "of the quadrants is preferably the same for all quadrants, for example, it may be about 1/8 of the outer diameter D of the cutter disk 1.
- The" center points "9 of FIG Quarter circles may for example have a distance a from the axis of rotation 8, which is approximately equal to half of the outer diameter D of the cutter disk 1.
- the center recess 5 - see FIG. 2 - a pure (ie everywhere) convex curve.
- the central recess 5 as shown by FIG. 2 be designed as an ellipse.
- an oval shape is possible.
- FIG. 2 is the length of a long half-axis 10 of the ellipse, for example, about 3/8 of the outer diameter D of the cutter disk 1.
- a length of a short half-axis 11 of the ellipse is in the embodiment of FIG. 2 at about 1/4 of the outer diameter D of the knife disc. 1
- the size of the central recess 5 can be determined as needed. Preferably lies - see the Figures 2 . 5 and 6 - A maximum distance from the boundaries of the central recess 5, which are opposite to each other with respect to the axis of rotation 8, between 70% to 80% of the outer diameter D of the knife disc 1. Further lies - see again the Figures 2 . 5 and 6 - A minimum distance from boundaries of the central recess 5, which are opposite to each other with respect to the axis of rotation 8, between 40% and 70% of the outer diameter D of the cutter disk. 1
- the center recess 5 is preferably arranged centrally to the axis of rotation 8 of the drive shaft 6. Furthermore, the central recess 5 seen in the direction of rotation of the drive shaft 6 preferably has a periodicity. It is therefore possible to remove the cutter disk 1 from the driver 7, then to rotate it about 360 ° / n about the axis of rotation 8 and then put it back on the driver 7.
- the value n has the value 2. In the embodiments of the Figures 5 and 6 For example, n has the value 4. However, depending on the design of the central recess 5, other values are also possible, for example 3, 5 and 6.
- the central recess 5 is indeed cornerless, but not circular, is - a correspondingly corresponding configuration of the driver 7 provided already realized by attaching the blade disc 1 on the driver 7 a rotationally fixed fixation of the blade disc 1 on the drive shaft 6 , Further recesses for driving pins and the like are therefore not required. Rather, it is possible that the central recess 5 is the only recess of the knife disc.
- the material of the blade disc 1 can be selected as needed.
- the material of the cutting disc 1 may be a ceramic.
- it may be, for example, a metal.
- metals in particular tool steels and - particularly preferably - hard metals in question.
- the driver 7 of the drive shaft 6 must, as already mentioned, have an outer contour which corresponds to the central recess 5 of the cutter disk 1. It is possible that the driver 7 is part of the drive shaft 6, with the drive shaft 6 is thus integrally connected. Alternatively, it may be at the driver 7 is an independent element which is detachably connected to the drive shaft 6. Such a driver 7 is in the FIGS. 7 and 8th shown. In this case, the driver 7 - in addition to its outer contour; this is formed as already described - in turn, also a central recess 12.
- the center recess 12 of the driver 7 can in principle have any shape. It may - analogous to the central recess 5 of the blade disc 1, although without corners, but not circular.
- the center recess 12 of the driver 7 may be circular.
- the center recess 12 of the driver 7 is formed as a square MittenausEnglishung 12, for example as a square or hexagonal MittenausANSung 12, so that the driver 7 is already held against rotation by plugging onto the drive shaft 5, even if it still has to be fixed axially.
- the present invention has many advantages. So it is particularly easy to implement. It may even be possible to rework a center recess of a prior art knife disk so that it is designed according to the invention after finishing. The risk of breakage of a cutting disc 1 according to the invention is considerably reduced compared with cutting discs of the prior art. Also, relatively little material is needed for the cutter disk 1 according to the invention. This is particularly important because, for example, carbide is relatively expensive.
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Abstract
Description
Die vorliegende Erfindung betrifft eine Messerscheibe zum Zerschneiden eines Materials,
- wobei die Messerscheibe an ihrem Außenumfang eine am Außenumfang umlaufende Schneidkante aufweist,
- wobei die Messerscheibe eine Mittenausnehmung zum Aufstecken der Messerscheibe auf einen Mitnehmer einer um eine Rotationsachse rotierbaren Antriebswelle aufweist.
- wherein the blade disc has on its outer circumference a peripheral edge on the cutting edge,
- wherein the cutter disc has a central recess for attaching the cutter disc to a driver of a drive shaft rotatable about a rotation axis.
Derartige Messerscheiben sind in vielfältiger Form bekannt, wobei die Messerscheiben sich, in der Draufsicht gesehen, im Wesentlichen durch ihren Durchmesser, die Form der Mittenausnehmung und das eventuelle Vorhandensein weiterer Ausnehmungen unterscheiden.Such cutting discs are known in many forms, the cutting discs, seen in plan view, differ essentially by their diameter, the shape of the central recess and the possible presence of further recesses.
So ist beispielsweise bekannt, die Mittenausnehmung als kreisrunde Ausnehmung auszugestalten. Die Mittenausnehmung kann - je nach Ausgestaltung - relativ klein oder relativ groß sein. Eine rein kreisförmige Mittenausnehmung ermöglicht jedoch keine drehfeste Verbindung zur Antriebswelle. Daher sind bei den Messerscheiben des Standes der Technik zusätzliche Maßnahmen getroffen, um das Drehmoment von der Antriebswelle auf die Messerscheibe übertragen zu können. So ist beispielsweise bekannt, in den verbleibenden Kreisring zwischen der Mittenausnehmung und dem Außenumfang der Messerscheibe eine Anzahl kreisrunder Bohrungen oder andersartige Ausnehmungen einzubringen, so dass Mitnehmerstifte oder dergleichen in die Bohrungen bzw. Ausnehmungen eingreifen können. Die Anzahl an weiteren Bohrungen bzw. Ausnehmungen variiert. In Einzelfällen ist nur eine einzige derartige Ausnehmung bzw. Bohrung vorhanden. In anderen Fällen beträgt die Anzahl an Bohrungen bzw. Ausnehmungen zwei. Auch mehr als zwei derartige Bohrungen bzw. Ausnehmungen sind bekannt. Teilweise sind bis zu sechs derartige Ausnehmungen bzw. Bohrungen vorhanden.For example, it is known to design the central recess as a circular recess. The central recess can - depending on the configuration - be relatively small or relatively large. However, a purely circular Mittenausnehmung does not allow a rotationally fixed connection to the drive shaft. Therefore, additional measures have been taken in the prior art cutting wheels to transfer the torque from the drive shaft to the cutter disk. For example, it is known to introduce a number of circular bores or other recesses into the remaining circular ring between the central recess and the outer circumference of the knife disk, so that driver pins or the like can engage in the bores or recesses. The number of further holes or recesses varies. In some cases, only a single such recess or hole is present. In other cases, the number of holes or recesses is two. Also more than two such Holes or recesses are known. Sometimes, up to six such recesses or holes are present.
Es ist weiterhin bekannt, die Mittenausnehmung zwar im Wesentlichen kreisförmig zu gestalten, wobei jedoch, ausgehend von der an sich kreisrunden Ausnehmung, mindestens eine nach radial außen zeigende U-förmige Ausnehmung angeordnet ist. Die Anzahl an U-förmigen Ausnehmungen variiert wieder. Minimal ist eine einzige derartige Ausnehmung vorhanden. Es sind auch Ausgestaltungen mit mehr als einer derartigen U-förmigen Ausnehmung vorhanden, beispielsweise mit vier derartigen Ausnehmungen.Although it is also known to make the central recess substantially circular, but, starting from the per se circular recess, at least one radially outwardly facing U-shaped recess is arranged. The number of U-shaped recesses varies again. Minimal, a single such recess is present. There are also embodiments with more than one such U-shaped recess, for example with four such recesses.
Die Messerscheiben des Standes der Technik bestehen oftmals aus Hartmetall oder aus Keramik. Sowohl Hartmetall als auch Keramik sind relativ spröde und brüchig. Im Betrieb geschieht es daher relativ oft, dass die Messerscheibe bricht und durch eine neue Messerscheibe ersetzt werden muss.The prior art knife discs are often made of cemented carbide or ceramic. Both carbide and ceramic are relatively brittle and brittle. In operation, therefore, it often happens that the blade breaks and must be replaced by a new blade.
Die Aufgabe der vorliegenden Erfindung besteht darin, eine Messerscheibe der eingangs genannten Art derart auszugestalten, dass die Bruchgefahr verringert ist.The object of the present invention is to design a cutting disc of the type mentioned in such a way that the risk of breakage is reduced.
Die Aufgabe wird durch eine Messerscheibe zum Zerschneiden eines Materials gelöst, welche die Merkmale des Anspruchs 1 aufweist. Vorteilhafte Ausgestaltungen der erfindungsgemäßen Messerscheibe sind Gegenstand der abhängigen Ansprüche 2 bis 9.The object is achieved by a cutting disc for cutting a material having the features of
Erfindungsgemäß ist vorgesehen, die Mittenausnehmung einer Messerscheibe der eingangs genannten Art als eckenlose, aber nicht kreisrunde Mittenausnehmung auszubilden, so dass die Messerscheibe nach dem Aufstecken auf den Mitnehmer drehfest auf der Antriebswelle fixiert ist.According to the invention, the center recess of a knife disc of the type mentioned as cornerless, but not circular Mittenausnehmung form, so that the blade disc is fixed in rotation on the drive shaft after plugging on the driver.
Es ist möglich, dass die Kontur der Mittenausnehmung eine konkav-konvexe oder plano-konvexe Kurve ist. Vorzugsweise jedoch ist die Kontur der Mittenausnehmung eine rein konvexe Kurve, beispielsweise eine Ellipse oder ein Oval.It is possible that the contour of the central recess is a concavo-convex or plano-convex curve. Preferably, however the contour of the central recess is a purely convex curve, for example an ellipse or an oval.
Auf Grund des Umstands, dass die Mittenausnehmung nicht kreisrund ist, variiert ein Abstand von bezüglich der Rotationsachse gegenüberliegenden Grenzen der Mittenausnehmung. Vorzugsweise beträgt der maximale Abstand derartiger Grenzen 70 % bis 80 % eines Außendurchmessers der Messerscheibe. Weiterhin beträgt ein minimaler Abstand derartiger Grenzen vorzugsweise 40 % bis 70 % des Außendurchmessers.Due to the fact that the central recess is not circular, a distance varies from the boundaries of the central recess opposite the axis of rotation. Preferably, the maximum distance of such limits is 70% to 80% of an outer diameter of the cutter disk. Furthermore, a minimum distance of such boundaries is preferably 40% to 70% of the outer diameter.
In der Regel ist die Mittenausnehmung zentrisch zur Rotationsachse der Antriebswelle angeordnet. Vorzugsweise weist die Mittenausnehmung in diesem Fall in Drehrichtung der Antriebswelle gesehen eine Periodizität auf.As a rule, the central recess is arranged centrically to the axis of rotation of the drive shaft. Preferably, the center recess in this case has a periodicity in the direction of rotation of the drive shaft.
Vorzugsweise ist die Mittenausnehmung die einzige Ausnehmung der Messerscheibe. Dies ist insbesondere herstellungstechnisch zu bevorzugen und verringert darüber hinaus die Bruchgefahr noch weiter.Preferably, the central recess is the only recess of the knife disc. This is in particular preferable to manufacture and also reduces the risk of breakage even further.
Die Messerscheibe kann prinzipiell aus einem beliebigen Material bestehen. Vorzugsweise besteht sie aus Metall - insbesondere Werkzeugstahl oder Hartmetall - und/oder aus Keramik.The knife disc can in principle consist of any material. Preferably, it consists of metal - in particular tool steel or carbide - and / or ceramic.
Die vorliegende Erfindung betrifft weiterhin eine Antriebswelle für eine Messerscheibe der obenstehend beschriebenen Art, wobei die Antriebswelle einen Mitnehmer aufweist, dessen Außenkontur mit der Mittenausnehmung der Messerscheibe korrespondiert.The present invention further relates to a drive shaft for a knife wheel of the type described above, wherein the drive shaft has a driver whose outer contour corresponds to the center recess of the cutter disk.
Die vorliegende Erfindung betrifft weiterhin einen Mitnehmer für eine Antriebswelle, wobei der Mitnehmer eine Mittenausnehmung aufweist, mit welcher der Mitnehmer auf eine Antriebswelle aufsteckbar ist, wobei der Mitnehmer eine Außenkontur aufweist, die mit der Mittenausnehmung einer erfindungsgemäßen Messerscheibe korrespondiert.The present invention further relates to a driver for a drive shaft, wherein the driver has a central recess with which the driver can be plugged onto a drive shaft, wherein the driver has an outer contour which corresponds to the center recess of a cutter disk according to the invention.
Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen in Verbindung mit den Zeichnungen. Es zeigen in Prinzipdarstellung
Figur 1- eine Messerscheibe und eine Antriebswelle in der Seitenansicht,
Figur 2- die Messerscheibe von
in der Draufsicht,Figur 1 Figuren 3 und 4- mögliche Ausgestaltungen einer Schneidkante,
Figuren 5 und 6- mögliche alternative Ausgestaltungen einer Messerscheibe in der Draufsicht,
Figur 7- einen Mitnehmer nebst Antriebswelle im Querschnitt und
Figur 8- den Mitnehmer von
in der Draufsicht.Figur 7
- FIG. 1
- a knife disc and a drive shaft in the side view,
- FIG. 2
- the cutting disc of
FIG. 1 in the plan view, - FIGS. 3 and 4
- possible embodiments of a cutting edge,
- FIGS. 5 and 6
- possible alternative embodiments of a cutting disc in plan view,
- FIG. 7
- a driver along with drive shaft in cross section and
- FIG. 8
- the driver of
FIG. 7 in the plan view.
In den
Die Messerscheibe 1 weist an ihrem Außenumfang 3 eine Schneidkante 4 auf, die entlang des Außenumfangs 3 umläuft. Die Schneidkante 4 kann - siehe
Die Messerscheibe 1 weist eine Mittenausnehmung 5 auf. Auf Grund des Vorhandenseins der Mittenausnehmung 5 ist die Messerscheibe 1 auf eine Antriebswelle 6 aufsteckbar. Sie ist dort auf einen Mitnehmer 7 der Antriebswelle 6 aufgesetzt. Über den Mitnehmer 7 ist die Messerscheibe 1 um eine Rotationsachse 8 der Antriebswelle 6 rotierbar.The
Die Mittenausnehmung 5 ist - siehe insbesondere
Die Mittenausnehmung 5 kann - siehe rein beispielhaft
Alternativ ist es möglich, dass die Außenkontur der Mittenausnehmung 5 als plano-konvexe Kurve ausgebildet ist, also als Kurve, die aus geraden Abschnitten besteht, die über konvexe Abschnitte ineinander übergehen.
Vorzugsweise jedoch ist die Mittenausnehmung 5 - siehe
Bei der - rein beispielhaften - Ausgestaltung von
Die Größe der Mittenausnehmung 5 kann nach Bedarf bestimmt sein. Vorzugsweise liegt - siehe die
Insbesondere mit den - wenn auch nur rein beispielhaften - Ausgestaltungen und Dimensionierungen der Mittenausnehmungen 5 der
Unabhängig davon, ob die Mittenausnehmung 5 als konkav-konvexe Mittenausnehmung, als plano-konvexe Mittenausnehmung oder als rein konvexe Mittenausnehmung ausgebildet ist, ist die Mittenausnehmung 5 vorzugsweise zentrisch zur Rotationsachse 8 der Antriebswelle 6 angeordnet. Weiterhin weist die Mittenausnehmung 5 in Drehrichtung der Antriebswelle 6 gesehen vorzugsweise eine Periodizität auf. Es ist also möglich, die Messerscheibe 1 von dem Mitnehmer 7 abzuziehen, sie sodann um 360° /n um die Rotationsachse 8 zu drehen und sie sodann wieder auf den Mitnehmer 7 aufzustecken. Bei der Ausgestaltung von
Auf Grund des Umstands, dass die Mittenausnehmung 5 zwar eckenlos, nicht aber kreisrund ist, ist - eine entsprechend korrespondierende Ausgestaltung des Mitnehmers 7 vorausgesetzt - bereits durch das Aufstecken der Messerscheibe 1 auf den Mitnehmer 7 eine drehfeste Fixierung der Messerscheibe 1 auf der Antriebswelle 6 realisiert. Weitere Ausnehmungen für Mitnehmerstifte und dergleichen sind daher nicht erforderlich. Vielmehr ist es möglich, dass die Mittenausnehmung 5 die einzige Ausnehmung der Messerscheibe ist.Due to the fact that the
Das Material der Messerscheibe 1 kann nach Bedarf gewählt werden. Beispielsweise kann das Material der Messerscheibe 1 eine Keramik sein. Alternativ kann es sich beispielsweise um ein Metall handeln. Als Metalle kommen insbesondere Werkzeugstähle und - besonders bevorzugt - Hartmetalle in Frage.The material of the
Der Mitnehmer 7 der Antriebswelle 6 muss, wie bereits erwähnt, eine Außenkontur aufweisen, die mit der Mittenausnehmung 5 der Messerscheibe 1 korrespondiert. Es ist möglich, dass der Mitnehmer 7 Bestandteil der Antriebswelle 6 ist, mit der Antriebswelle 6 also einstückig verbunden ist. Alternativ kann es sich bei dem Mitnehmer 7 um ein eigenständiges Element handeln, das mit der Antriebswelle 6 lösbar verbunden ist. Ein derartiger Mitnehmer 7 ist in den
Die vorliegende Erfindung weist viele Vorteile auf. So ist sie insbesondere leicht zu realisieren. Eventuell ist es sogar möglich, eine Mittenausnehmung einer Messerscheibe des Standes der Technik nachzubearbeiten, so dass sie nach der Nachbearbeitung erfindungsgemäß ausgebildet ist. Die Bruchgefahr einer erfindungsgemäßen Messerscheibe 1 ist gegenüber Messerscheiben des Standes der Technik erheblich reduziert. Auch wird für die erfindungsgemäße Messerscheibe 1 relativ wenig Material benötigt. Dies ist insbesondere deshalb von Bedeutung, weil beispielsweise Hartmetall relativ teuer ist.The present invention has many advantages. So it is particularly easy to implement. It may even be possible to rework a center recess of a prior art knife disk so that it is designed according to the invention after finishing. The risk of breakage of a
Die obige Beschreibung dient ausschließlich der Erläuterung der vorliegenden Erfindung. Der Schutzumfang der vorliegenden Erfindung soll hingegen ausschließlich durch die beigefügten Ansprüche bestimmt sein.The above description is only for explanation of the present invention. The scope of the present invention, however, is intended to be determined solely by the appended claims.
- 11
- Messerscheibediameter disc
- 22
- Materialmaterial
- 33
- Außenumfangouter periphery
- 44
- Schneidkantecutting edge
- 5, 125, 12
- MittenausnehmungenMittenausnehmungen
- 66
- Antriebswelledrive shaft
- 77
- Mitnehmertakeaway
- 88th
- Rotationsachseaxis of rotation
- 99
- Mittelpunktemidpoints
- 10, 1110, 11
- Halbachsensemiaxes
- aa
- Abstanddistance
- dd
- Dickethickness
- DD
- Durchmesserdiameter
- r, r', r"r, r ', r "
- Radienradii
Claims (11)
dadurch gekennzeichnet,
dass die Mittenausnehmung (5) eine rein konvexe Kurve ist.Knife disc according to claim 1,
characterized,
that the center (5) is a purely convex curve.
dadurch gekennzeichnet,
dass die Mittenausnehmung (5) als Ellipse oder als Oval ausgebildet ist.Knife disc according to claim 2,
characterized,
that the center (5) is designed as an ellipse or as an oval.
dadurch gekennzeichnet,
dass ein maximaler Abstand von bezüglich der Rotationsachse (8) gegenüberliegenden Grenzen der Mittenausnehmung (5) 70 % bis 80 % eines Außendurchmessers (D) der Messerscheibe beträgt.Knife disc according to claim 1, 2 or 3,
characterized,
that a maximum distance from the axis of rotation (8) opposite boundaries of the central recess (5) is 70% to 80% of an outer diameter (D) of the cutter disc.
dadurch gekennzeichnet,
dass ein minimaler Abstand gegenüberliegender Grenzen der Mittenausnehmung (5) 40 % bis 70 % eines Außendurchmessers (D) der Messerscheibe beträgt.Knife disc according to one of the above claims,
characterized,
that a minimum distance of opposite boundaries of the Mittenausnehmung (5) 40% to 70% of an outer diameter (D) of the cutter disc amounts.
dadurch gekennzeichnet,
dass die Mittenausnehmung (5) zentrisch zur Rotationsachse (8) der Antriebswelle (6) angeordnet ist.Knife disc according to one of the above claims,
characterized,
in that the central recess (5) is arranged centrically to the axis of rotation (8) of the drive shaft (6).
dadurch gekennzeichnet,
dass die Mittenausnehmung (5) in Drehrichtung der Antriebswelle (6) gesehen eine Periodizität aufweist.Knife disc according to claim 6,
characterized,
that the center (5) seen in the rotational direction of the drive shaft (6) having a periodicity.
dadurch gekennzeichnet,
dass die Mittenausnehmung (5) die einzige Ausnehmung der Messerscheibe ist.Knife disc according to one of the above claims,
characterized,
that the central recess (5) is the only recess of the knife disc.
dadurch gekennzeichnet,
dass die Messerscheibe aus Metall - insbesondere aus Werkzeugstahl oder aus Hartmetall - und/oder aus Keramik besteht.Knife disc according to one of the above claims,
characterized,
that the cutting disc made of metal - in particular tool steel or tungsten carbide - and / or ceramic.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL11178248T PL2422941T3 (en) | 2010-08-23 | 2011-08-22 | Cutting blade with cornerless non-circular central recess |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010037109A DE102010037109A1 (en) | 2010-08-23 | 2010-08-23 | Knife disk for cutting a material |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2422941A1 true EP2422941A1 (en) | 2012-02-29 |
EP2422941B1 EP2422941B1 (en) | 2016-01-13 |
Family
ID=44720582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11178248.8A Not-in-force EP2422941B1 (en) | 2010-08-23 | 2011-08-22 | Cutting blade with cornerless non-circular central recess |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2422941B1 (en) |
DE (1) | DE102010037109A1 (en) |
PL (1) | PL2422941T3 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2050911A (en) * | 1979-05-22 | 1981-01-14 | Jagenberg Werke Ag | Cutter assembly |
US5303688A (en) * | 1992-04-03 | 1994-04-19 | Chiuminatta Edward R | Mounting arbor for saw cutting blades |
DE102004056642A1 (en) * | 2004-11-24 | 2006-06-01 | Ziaei, Masoud, Dr. | Profile contour for form-fit shaft-hub-connection, has geometry that represents non-circular inner and/or outer contours for technical application, where contour possesses mathematical stability different from usual profiles |
-
2010
- 2010-08-23 DE DE102010037109A patent/DE102010037109A1/en not_active Withdrawn
-
2011
- 2011-08-22 PL PL11178248T patent/PL2422941T3/en unknown
- 2011-08-22 EP EP11178248.8A patent/EP2422941B1/en not_active Not-in-force
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2050911A (en) * | 1979-05-22 | 1981-01-14 | Jagenberg Werke Ag | Cutter assembly |
US5303688A (en) * | 1992-04-03 | 1994-04-19 | Chiuminatta Edward R | Mounting arbor for saw cutting blades |
DE102004056642A1 (en) * | 2004-11-24 | 2006-06-01 | Ziaei, Masoud, Dr. | Profile contour for form-fit shaft-hub-connection, has geometry that represents non-circular inner and/or outer contours for technical application, where contour possesses mathematical stability different from usual profiles |
Also Published As
Publication number | Publication date |
---|---|
EP2422941B1 (en) | 2016-01-13 |
PL2422941T3 (en) | 2016-07-29 |
DE102010037109A1 (en) | 2012-02-23 |
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