EP2883669A1 - Cutting tooth for a saw chain - Google Patents

Cutting tooth for a saw chain Download PDF

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Publication number
EP2883669A1
EP2883669A1 EP14004127.8A EP14004127A EP2883669A1 EP 2883669 A1 EP2883669 A1 EP 2883669A1 EP 14004127 A EP14004127 A EP 14004127A EP 2883669 A1 EP2883669 A1 EP 2883669A1
Authority
EP
European Patent Office
Prior art keywords
rivet
cutting
base body
cutting tooth
cutting element
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
Application number
EP14004127.8A
Other languages
German (de)
French (fr)
Other versions
EP2883669B1 (en
Inventor
Berthold Schell
Oliver Gerstenberger
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.)
Andreas Stihl AG and Co KG
Original Assignee
Andreas Stihl AG and Co KG
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 Andreas Stihl AG and Co KG filed Critical Andreas Stihl AG and Co KG
Publication of EP2883669A1 publication Critical patent/EP2883669A1/en
Application granted granted Critical
Publication of EP2883669B1 publication Critical patent/EP2883669B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/14—Saw chains
    • B27B33/142—Cutter elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/14—Saw chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/14—Saw chains
    • B27B33/141—Saw chains with means to control the depth of cut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
    • B27B33/14—Saw chains
    • B27B33/142—Cutter elements
    • B27B33/144—Cutter elements having cutting inserts or exchangeable cutting teeth
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/909—Cutter assemblage or cutter element therefor [e.g., chain saw chain]
    • Y10T83/925—Having noncutting depth gauge

Definitions

  • the invention relates to a cutting tooth for a saw chain according to the preamble of claim 1.
  • a generic cutting tooth which consists of a base body with a cutter attached to the base body of hard metal. In the foot region of the main body rivet openings are formed, which follow one another in the direction of the cutting tooth. In the direction of the cutting element, a depth limiter is provided on the base body. Between the depth limiter and the cutting tooth a chip recess is formed. The cutting element is held in a countersink in the upper edge of the base body, wherein a side portion of the cutting element is fixed by means of brazing on the side surface of the base body. Good cutting results are achieved with the known cutting tooth.
  • the cutting element made of hard metal is designed to be small relative to the base body, so that the hard soldering surfaces defining the cutting element on the base body are limited.
  • the invention has the object of developing a cutting tooth of the generic type such that a large-area, durable connection of the cutting element made of hard metal is given to the main body of the cutting tooth to increase the cutting performance and service life of the cutting tooth.
  • the corner point so far in the direction of the cutting tooth to lay forward that the corner is at a first distance to a chip recess defining high edge of the depth limiter, which is smaller than a second distance of a median plane to the high edge of the depth limiter ,
  • the median plane divides the rivet spacing between the rivet openings, wherein the distance line of the center axes of the rivet openings is perpendicular to the median plane.
  • the design is chosen so that - seen in side view - the high edge of the depth limiter lies in the direction of travel in front of the central axis of the front in the direction of the rivet opening.
  • the chip recess thus extends - seen in plan view of the cutting tooth - in the running direction to the center axis of the front rivet opening.
  • the corner lies in the front half of the rivet spacing in the running direction, ie in the direction of travel in front of the median plane, which divides the rivet spacing and on which the rivet spacing is perpendicular.
  • This geometrical design creates a cutting tooth that resists even heavy loads, shows good cutting performance and ensures a long service life.
  • the distance of the corner point of the high edge of the depth limiter is 0.5 times to 0.8 times the distance of the median plane to the vertical axis of the depth limiter.
  • the distance of the corner point to the vertical axis is designed so that it is 0.6 times to 0.7 times, in particular 0.65 times the distance of the vertical axis to the center plane.
  • the intended for receiving the preferably L-shaped cutting element counterbore extends in the direction of a length corresponding to about 70% to 90% of a section length of the upper edge extending between the chip recess and the rear end edge of the main body in the direction.
  • the countersink has an end which is remote from the depth limiter and forms a stop for the cutting element. At the stop of the roof portion of the cutting element abuts, so that the cutting element is supported against the direction of the cutting tooth with its roof section.
  • the position of the cutting element on the base body and the length of the cutting element itself are chosen so that the rear end of the cutting element ends in the direction of the rear rivet hole.
  • the measured in the direction of the length of the cutting element is preferably 70% to 100% of the rivet spacing of the center axes of the rivet openings from each other. In particular, a length is selected which is 90% of the rivet spacing.
  • the geometry of the cutting element is designed so that the ratio of a maximum height of the cutting element measured perpendicular to the running direction to a maximum length of the cutting element measured in the running direction is in the range from 0.4 to 0.5, in particular 0.46.
  • the cutting element itself has a side portion which has a rivet openings facing, extending in the direction of the lower longitudinal edge.
  • This longitudinal edge extends over the length of the cutting element at an angle, preferably at an angle of 0.5 ° to 2 ° to a reference plane which is determined by the center axes of the rivet openings.
  • the position of the corner point is based on the main body of the cutting tooth chosen so that the distance between the central axis of the trailing in the direction of the rear rivet and the corner in the chip recess 85% to 110% of the measured in the direction of rivet spacing of the center axes of the rivet openings from each other.
  • a distance of the central axis is selected to the vertex, which is about 95% of the rivet spacing.
  • the distance line between the central axis of the rear rivet opening and the corner point in the chip recess is at an angle of 35 ° to 40 ° to a reference plane which is spanned by the center axes of the rivet openings.
  • the angle of the distance line with the reference plane is 37 °.
  • the depth limiter of the cutting tooth is formed integrally with the main body of the cutting tooth, in particular as provided by the main body bent residual flange.
  • the residual flange is a front lying in the direction of the section, which results after the formation of the chip recess 5.
  • the cutting tooth 1 shown in the figures has a main body 2, which consists essentially of a planar board 22.
  • the main body 2 has - as in particular from the side views of the FIGS. 2 and 3 can be seen - an upper edge 31 and a lower foot portion 28 on.
  • rivet openings 11 and 12 are formed, which follow one another in the direction LR of the cutting tooth 1.
  • the rivet opening 11 is a leading, front rivet opening, while the rivet opening 12 is a trailing, rear rivet opening.
  • each rivet opening has a central axis M1 and M2, which lie in the direction LR with a rivet spacing N to each other.
  • a chip recess 5 is formed, which extends between a countersink 30 (FIG. Fig. 3 ) extends in the upper edge 31 and a left in the direction LR residual flange 34.
  • the residual flange 34 is angled out of the plane of the board 22, as the Fig. 1 and 6 clearly show.
  • the angled residual flange 34 forms a depth limiter 4 of the cutting tooth.
  • the countersink 30 ( Fig. 3 ) is open at its front in the direction LR end to SpanausEnglishung 5, while at its rear end a residual portion 35 of the upper edge 31 forms a stop 10 for a cutting element 3.
  • the cutting element 3 has, as Fig. 7 shows, seen in the direction LR an L-shaped basic shape. A resting on the side surface 32 side legs 27 of the body forms a side portion 7 of the cutting element 3; an angle to the side surface 32 lying roof leg 26 forms a roof portion 6 of the cutting element. 3
  • the roof surface of the roof section 6 is at an angle 25 of about 9 ° to the reference plane H, wherein the angle 25 opens forward in the direction LR.
  • a roof cutting 16 is formed; on the front in the direction LR edge of the side portion 7 a side cutting edge 17 is formed.
  • the side cutting edge 17 is designed in the form of a groove.
  • the cutting element 3 is made of hard metal and is by means of a heat-introducing compound such.
  • the roof section 6 is located in the countersink 30, wherein the bottom 36 of the countersink 30 is materially connected to the overlying surface of the roof section 6.
  • the roof portion 6 is integrally connected over the entire bottom surface 36 with the base body 2, preferably brazed.
  • the length S of the countersink 30 is shorter than the maximum length L max (FIG. Fig. 2 ) of the cutting element 3.
  • the cutting tooth 3 thus protrudes into the chip recess 5 a.
  • Both the roof section 6 and the side section 7 protrude into the chip recess 5.
  • the edge contour 15 of the chip recess 5 and the front in the direction of LR contour 13 of the side portion 7 of the cutting tooth 3 form a side view of the base body 2 (s. Fig. 3 ) From a corner 8, which lies within the chip recess 5.
  • a median plane V is erected which divides the rivet spacing N in the middle.
  • the distance line of the rivet spacing N is perpendicular to the median plane V.
  • the depth limiter 4 has a clamping edge 5 limiting high edge 9 ( Fig. 3 ).
  • this high edge 9 is substantially vertical in side view, ie the high edge 9 is perpendicular to a reference plane H determined by the center axes M1 and M2 of the rivet openings 11, 12.
  • the high edge 9 may also be inclined in the direction LR, as shown in dashed lines is.
  • the corner point 8 formed by the contour 13 of the side section 7 and the contour 15 of the chip recess 5 lies at a distance A from the top edge 9.
  • the center plane V lies at a distance B from the top edge 9.
  • the geometry is selected so that the Distance A is smaller than the distance B.
  • the vertical axis 9 lies in the direction LR in front of the central axis M1 of the front rivet opening 11. This is in the side view Fig. 3 shown.
  • the distance A or B measured in the running direction LR is measured from the same distance point 39 to the center plane V. Is the high edge 9 - as indicated by dashed lines with the reference numeral 9 '- z. B. inclined in the direction of LR, so arise based on a distance point 39 'of the inclined high edge 9', the same spacing conditions as in a plane perpendicular to the reference plane H high edge.
  • the structural design and design of the cutting tooth ensures a high level of operational reliability over a long period of operation, wherein the cutting tooth 3 is materially connected over a maximum area with the planar board 22 of the base body 2, z. B. by brazing, in particular by silver solder.
  • the cutting tooth 3 is supported on a stop 10, against which the roof section 6 of the cutting element 3 abuts against the running direction LR.
  • the stop 10 forms the rear in the running direction LR end of the countersink 30.
  • the stop 10 having the end facing away from the depth limiter 4.
  • the surface of the stop 10 is - seen in the running direction - behind the trailing rivet opening 12; expediently - seen in a side view of the main body 2 - the stop 10 has a measured in the direction LR distance 19 to the rivet opening 12th
  • the counterbore 30 extends counter to the running direction LR of the cutting tooth 3 to the rear beyond the rear rivet hole 12 so that only a small remaining portion 35 of the upper edge 31 with a residual length R remains.
  • the design of the base body 2 and the cutting element 3 is coordinated such that the first distance A of the corner 8 from the distance point 39 and 39 '0.5 times to 0.8 times the second distance B of the distance point 39 and 39' of the median plane V is.
  • the first distance A is chosen such that it is 0.6 times to 0.7 times the second distance.
  • An expedient embodiment is achieved when the first distance A is 0.65 times the second distance B.
  • the extending in the direction of LR counterbore 30 in the upper edge 31 has a length S, which corresponds to about 70% to 90% of the section length of the upper edge 31 extending between the chip recess 5 and the rear end edge 38 of the body 2.
  • the constructive design is designed such that the measured in the direction LR maximum length L max of the cutting element 3 is about 70% to 100% of the distance N of the center axes M1 and M2 of the rivet openings 11 and 12 from each other.
  • An advantageous embodiment is achieved when the measured length L max in the direction LR is about 90% of the rivet spacing N.
  • the geometry of the cutting element 3 is further designed such that the ratio of a maximum height H max of the cutting element 3 measured perpendicular to the running direction to a maximum length L max of the cutting element 3 measured in the running direction LR is in the range from 0.4 to 0.5, as in Fig. 2 shown.
  • An optimal design is achieved when a ratio of 0.46 is set.
  • Fig. 2 shows that the side portion 7 has a rivet openings 11, 12 facing, extending in the direction LR lower longitudinal edge 14 which extends over the length L max of the cutting element 3.
  • the lower longitudinal edge 8 is at an angle 23 of 0.5 ° to 2 ° to the reference plane H through the center axes M1 and M2 of the rivet openings 11 and 12.
  • the lower longitudinal edge 8 of the side portion defines a chamfer 18 at the lower end of the side portion 7 is formed and extends in the running direction LR.
  • the distance E between the center axis M2 of the trailing in the direction LR rear rivet opening 12 and the corner 8 in the chip recess 5 is selected so that the distance E about 85% to 110% of the measured in the direction LR rivet spacing N of the central axes M1 and M2 the rivet openings 11 and 12 amounts to.
  • the distance E is expediently selected to be 95% of the rivet spacing N.
  • the distance line 20 between the central axis M1 of the rear rivet opening 12 and the corner 8 in the chip recess 5 forms with the reference plane H an angle 23 between 35 ° and 40 °.
  • the position of the corner point 8 is selected such that the angle 23 has a size of about 37 °.
  • the excavated from the plane of the board 22 of the base body 2 depth limiter 4 is angled at an angle 24 of about 10 ° to 15 °, in particular 12 °.
  • the depth limiter 4 is formed integrally with the base body 2.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Insertion Pins And Rivets (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Sawing (AREA)

Abstract

Die Erfindung betrifft einen Schneidzahn (1) für eine Sägekette, bestehend aus einem Grundkörper (2) mit einem am Grundkörper (2) befestigten Schneidelement (3) aus Hartmetall. Das Schneidelement (3) aus Hartmetall weist eine Dachschneide (16) sowie einen Seitenabschnitt (7) mit einer Seitenschneide (17) auf. Im Grundkörper (2) ist eine Spanausnehmung (5) zur Spanableitung vorgesehen, wobei das Schneidelement (3) in die Spanausnehmung (5) einragt und in Seitenansicht auf den Grundkörper (2) eine vordere Kontur (14) des Seitenabschnitts (7) und die Innenkontur (15) der Spanausnehmung (5) einen Eckpunkt (8) bilden. Nach der Erfindung liegt der Eckpunkt (8) mit einem ersten Abstand (A) zu einer die Spanausnehmung (5) begrenzenden Hochkante (9) des Tiefenbegrenzers (4), der kleiner ist als ein zweiter Abstand (B) einer den Nietabstand (N) teilenden Mittelebene (V) zu der Hochkante (9) des Tiefenbegrenzers (4). Die Hochkante (9) des Tiefenbegrenzers (4) liegt in Laufrichtung (LR) vor der Mittelachse (M1) der vorderen Nietöffnung (11).The invention relates to a cutting tooth (1) for a saw chain, comprising a base body (2) with a cutting element (3) made of hard metal attached to the base body (2). The cutting element (3) made of hard metal has a roof cutting edge (16) and a side section (7) with a side cutting edge (17). In the base body (2) a chip recess (5) for chip removal is provided, wherein the cutting element (3) protrudes into the chip recess (5) and in side view of the base body (2) has a front contour (14) of the side portion (7) and the Inner contour (15) of the chip recess (5) form a corner point (8). According to the invention, the corner point (8) lies at a first distance (A) to a high edge (9) of the depth limiter (4) delimiting the chip recess (5), which is smaller than a second distance (B) of a rivet spacing (N). dividing median plane (V) to the high edge (9) of the depth limiter (4). The high edge (9) of the depth limiter (4) lies in the running direction (LR) in front of the central axis (M1) of the front rivet opening (11).

Description

Die Erfindung betrifft einen Schneidzahn für eine Sägekette nach dem Oberbegriff des Anspruchs 1.The invention relates to a cutting tooth for a saw chain according to the preamble of claim 1.

Aus der DE 10 2007 050 778 A1 ist ein gattungsgemäßer Schneidzahn bekannt, der aus einem Grundkörper mit einem am Grundkörper befestigten Schneidelement aus Hartmetall besteht. Im Fußbereich des Grundkörpers sind Nietöffnungen ausgebildet, die in Laufrichtung des Schneidzahns aufeinander folgen. In Laufrichtung vor dem Schneidelement ist am Grundkörper ein Tiefenbegrenzer vorgesehen. Zwischen dem Tiefenbegrenzer und dem Schneidzahn ist eine Spanausnehmung ausgebildet. Das Schneidelement ist in einer Ansenkung im oberen Rand des Grundkörpers gehalten, wobei ein Seitenabschnitt des Schneidelementes mittels Hartlot auf der Seitenfläche des Grundkörpers festgelegt ist. Mit dem bekannten Schneidzahn werden gute Schneidergebnisse erzielt.From the DE 10 2007 050 778 A1 a generic cutting tooth is known, which consists of a base body with a cutter attached to the base body of hard metal. In the foot region of the main body rivet openings are formed, which follow one another in the direction of the cutting tooth. In the direction of the cutting element, a depth limiter is provided on the base body. Between the depth limiter and the cutting tooth a chip recess is formed. The cutting element is held in a countersink in the upper edge of the base body, wherein a side portion of the cutting element is fixed by means of brazing on the side surface of the base body. Good cutting results are achieved with the known cutting tooth.

Das aus Hartmetall bestehende Schneidelement ist relativ zum Grundkörper klein ausgebildet, so dass die das Schneidelement am Grundkörper festlegenden Hartlotflächen begrenzt sind.The cutting element made of hard metal is designed to be small relative to the base body, so that the hard soldering surfaces defining the cutting element on the base body are limited.

Der Erfindung liegt die Aufgabe zugrunde, einen Schneidzahn der gattungsgemäßen Art derart weiterzubilden, dass eine großflächige, widerstandsfähige Verbindung des Schneidelementes aus Hartmetall mit dem Grundkörper des Schneidzahns gegeben ist, um die Schnittleistung und die Standzeit des Schneidzahns zu erhöhen.The invention has the object of developing a cutting tooth of the generic type such that a large-area, durable connection of the cutting element made of hard metal is given to the main body of the cutting tooth to increase the cutting performance and service life of the cutting tooth.

Die Aufgabe wird erfindungsgemäß nach den kennzeichnenden Merkmalen des Anspruchs 1 gelöst.The object is achieved according to the characterizing features of claim 1.

In Seitenansicht auf die Spanausnehmung definieren die Innenkontur der Spanausnehmung und die vordere Kontur des in die Spanausnehmung einragenden Seitenabschnitts des Schneidelementes einen Eckpunkt, der in der Spanausnehmung liegt. Nach der Erfindung ist vorgesehen, den Eckpunkt derart weit in Laufrichtung des Schneidzahns nach vorne zu legen, dass der Eckpunkt mit einem ersten Abstand zu einer die Spanausnehmung begrenzenden Hochkante des Tiefenbegrenzers liegt, der kleiner ist als ein zweiter Abstand einer Mittelebene zu der Hochkante des Tiefenbegrenzers. Die Mittelebene teilt den Nietabstand zwischen den Nietöffnungen, wobei die Abstandslinie der Mittelachsen der Nietöffnungen senkrecht auf der Mittelebene steht. Die Gestaltung ist dabei so gewählt, dass - in Seitenansicht gesehen - die Hochkante des Tiefenbegrenzers in Laufrichtung vor der Mittelachse der in Laufrichtung vorderen Nietöffnung liegt. Die Spanausnehmung erstreckt sich somit - in Draufsicht auf den Schneidzahn gesehen - in Laufrichtung bis vor die Mittelachse der vorderen Nietöffnung.In side view of the chip recess define the inner contour of the chip recess and the front contour of the projecting into the chip recess side portion of the cutting element a corner, which lies in the chip recess. According to the invention, the corner point so far in the direction of the cutting tooth to lay forward that the corner is at a first distance to a chip recess defining high edge of the depth limiter, which is smaller than a second distance of a median plane to the high edge of the depth limiter , The median plane divides the rivet spacing between the rivet openings, wherein the distance line of the center axes of the rivet openings is perpendicular to the median plane. The design is chosen so that - seen in side view - the high edge of the depth limiter lies in the direction of travel in front of the central axis of the front in the direction of the rivet opening. The chip recess thus extends - seen in plan view of the cutting tooth - in the running direction to the center axis of the front rivet opening.

Nach der Erfindung liegt der Eckpunkt in der in Laufrichtung vorderen Hälfte des Nietabstandes, also in Laufrichtung vor der Mittelebene, die den Nietabstand teilt und auf der der Nietabstand lotrecht steht.According to the invention, the corner lies in the front half of the rivet spacing in the running direction, ie in the direction of travel in front of the median plane, which divides the rivet spacing and on which the rivet spacing is perpendicular.

Durch diese geometrische Auslegung wird ein Schneidzahn geschaffen, der auch großen Belastungen widersteht, eine gute Schnittleistung zeigt und eine lange Betriebsdauer gewährleistet.This geometrical design creates a cutting tooth that resists even heavy loads, shows good cutting performance and ensures a long service life.

Zweckmäßig beträgt der Abstand des Eckpunktes von der Hochkante des Tiefenbegrenzers das 0,5fache bis 0,8fache des Abstandes der Mittelebene zur Hochachse des Tiefenbegrenzers.Suitably, the distance of the corner point of the high edge of the depth limiter is 0.5 times to 0.8 times the distance of the median plane to the vertical axis of the depth limiter.

In besonderer Gestaltung ist der Abstand des Eckpunktes zur Hochachse so ausgelegt, dass er das 0,6fache bis 0,7fache, insbesondere das 0,65fache des Abstandes der Hochachse zur Mittelebene beträgt.In a particular embodiment, the distance of the corner point to the vertical axis is designed so that it is 0.6 times to 0.7 times, in particular 0.65 times the distance of the vertical axis to the center plane.

Die zur Aufnahme des vorzugsweise L-förmig ausgebildeten Schneidelementes vorgesehene Ansenkung erstreckt sich in Laufrichtung über eine Länge, die etwa 70% bis 90% einer Abschnittslänge des oberen Randes entspricht, der sich zwischen der Spanausnehmung und der in Laufrichtung hinteren Abschlusskante des Grundkörpers erstreckt.The intended for receiving the preferably L-shaped cutting element counterbore extends in the direction of a length corresponding to about 70% to 90% of a section length of the upper edge extending between the chip recess and the rear end edge of the main body in the direction.

Zweckmäßig weist die Ansenkung ein Ende auf, das von dem Tiefenbegrenzer abgewandt liegt und einen Anschlag für das Schneidelement bildet. An dem Anschlag liegt der Dachabschnitt des Schneidelementes an, so dass sich das Schneidelement entgegen der Laufrichtung des Schneidzahns mit seinem Dachabschnitt abstützt.Suitably, the countersink has an end which is remote from the depth limiter and forms a stop for the cutting element. At the stop of the roof portion of the cutting element abuts, so that the cutting element is supported against the direction of the cutting tooth with its roof section.

Die Position des Schneidelementes am Grundkörper und die Länge des Schneidelementes selbst sind so gewählt, dass das hintere Ende des Schneidelementes in Laufrichtung nach dem hinteren Nietloch endet. Die in Laufrichtung gemessene Länge des Schneidelementes beträgt vorzugsweise 70% bis 100% des Nietabstandes der Mittelachsen der Nietöffnungen voneinander. Insbesondere ist eine Länge gewählt, die 90% des Nietabstandes beträgt.The position of the cutting element on the base body and the length of the cutting element itself are chosen so that the rear end of the cutting element ends in the direction of the rear rivet hole. The measured in the direction of the length of the cutting element is preferably 70% to 100% of the rivet spacing of the center axes of the rivet openings from each other. In particular, a length is selected which is 90% of the rivet spacing.

Die Geometrie des Schneidelementes ist so ausgelegt, dass das Verhältnis einer senkrecht zur Laufrichtung gemessenen maximalen Höhe des Schneidelementes zu einer in Laufrichtung gemessenen maximalen Länge des Schneidelementes im Bereich von 0,4 bis 0,5 liegt, insbesondere 0,46 ist.The geometry of the cutting element is designed so that the ratio of a maximum height of the cutting element measured perpendicular to the running direction to a maximum length of the cutting element measured in the running direction is in the range from 0.4 to 0.5, in particular 0.46.

Das Schneidelement selbst hat einen Seitenabschnitt, der eine den Nietöffnungen zugewandt liegende, sich in Laufrichtung erstreckende untere Längskante aufweist. Diese Längskante erstreckt sich über die Länge des Schneidelementes unter einem Winkel, vorzugsweise unter einem Winkel von 0,5° bis 2° zu einer Bezugsebene, die durch die Mittelachsen der Nietöffnungen bestimmt ist.The cutting element itself has a side portion which has a rivet openings facing, extending in the direction of the lower longitudinal edge. This longitudinal edge extends over the length of the cutting element at an angle, preferably at an angle of 0.5 ° to 2 ° to a reference plane which is determined by the center axes of the rivet openings.

Die Lage des Eckpunktes ist bezogen auf den Grundkörper des Schneidzahns so gewählt, dass der Abstand zwischen der Mittelachse der in Laufrichtung nachlaufenden hinteren Nietöffnung und dem Eckpunkt in der Spanausnehmung 85% bis 110% des in Laufrichtung gemessenen Nietabstandes der Mittelachsen der Nietöffnungen voneinander beträgt. Insbesondere ist ein Abstand der Mittelachse zum Eckpunkt gewählt, der etwa 95% des Nietabstandes beträgt. Die Abstandslinie zwischen der Mittelachse der hinteren Nietöffnung und dem Eckpunkt in der Spanausnehmung liegt unter einem Winkel von 35° bis 40° zu einer Bezugsebene, die durch die Mittelachsen der Nietöffnungen aufgespannt ist. Insbesondere beträgt der Winkel der Abstandslinie mit der Bezugsebene 37°.The position of the corner point is based on the main body of the cutting tooth chosen so that the distance between the central axis of the trailing in the direction of the rear rivet and the corner in the chip recess 85% to 110% of the measured in the direction of rivet spacing of the center axes of the rivet openings from each other. In particular, a distance of the central axis is selected to the vertex, which is about 95% of the rivet spacing. The distance line between the central axis of the rear rivet opening and the corner point in the chip recess is at an angle of 35 ° to 40 ° to a reference plane which is spanned by the center axes of the rivet openings. In particular, the angle of the distance line with the reference plane is 37 °.

Der Tiefenbegrenzer des Schneidzahns ist einteilig mit dem Grundkörper des Schneidzahns ausgebildet, insbesondere als vom Grundkörper abgebogener Restflansch vorgesehen. Der Restflansch ist ein in Laufrichtung vorne liegender Abschnitt, der sich nach Ausbildung der Spanausnehmung 5 ergibt.The depth limiter of the cutting tooth is formed integrally with the main body of the cutting tooth, in particular as provided by the main body bent residual flange. The residual flange is a front lying in the direction of the section, which results after the formation of the chip recess 5.

Der Grundkörper selbst bildet eine ebene Platine, wobei der Restflansch zunächst in dieser Ebene der Platine liegt. Zur Bildung des Tiefenbegrenzers wird der Restflansch aus der Ebene der Platine abgewinkelt.The main body itself forms a flat board, the residual flange is initially in this plane of the board. To form the depth limiter, the residual flange is angled away from the plane of the board.

Weitere Merkmale der Erfindung ergeben sich aus den weiteren Ansprüchen, der Beschreibung und der Zeichnung, in der nachfolgend ein im Einzelnen beschriebenes Ausführungsbeispiel der Erfindung dargestellt ist. Es zeigen:

Fig. 1
eine perspektivische Darstellung eines erfindungsgemäßen Schneidzahns mit einem Schneidelement aus Hartmetall,
Fig. 2
eine Seitenansicht auf den Schneidzahn nach Fig. 1,
Fig. 3
eine weitere Seitenansicht auf den Schneidzahn nach Fig. 1,
Fig. 4
eine Draufsicht auf den Schneidzahn nach Fig. 1,
Fig. 5
eine Ansicht von unten auf den Schneidzahn nach Fig. 1,
Fig. 6
eine Ansicht von vorne auf den Schneidzahn nach Fig. 1,
Fig. 7
eine Ansicht von hinten auf den Schneidzahn nach Fig. 1.
Further features of the invention will become apparent from the other claims, the description and the drawing, in the following a described in detail embodiment of the invention is shown. Show it:
Fig. 1
a perspective view of a cutting tooth according to the invention with a cutting element made of hard metal,
Fig. 2
a side view of the cutting tooth Fig. 1 .
Fig. 3
another side view of the cutting tooth after Fig. 1 .
Fig. 4
a plan view of the cutting tooth after Fig. 1 .
Fig. 5
a view from below of the cutting tooth Fig. 1 .
Fig. 6
a view from the front of the cutting tooth Fig. 1 .
Fig. 7
a view from behind of the cutting tooth Fig. 1 ,

Der in den Figuren dargestellte Schneidzahn 1 weist einen Grundkörper 2 auf, der im Wesentlichen aus einer ebenen Platine 22 besteht. Der Grundkörper 2 weist - wie insbesondere aus den Seitenansichten nach den Fig. 2 und 3 zu ersehen ist - einen oberen Rand 31 und einen unteren Fußbereich 28 auf. Im unteren Fußbereich 28 sind in der Platine 22 (Fig. 1 bis 3) des Grundkörpers 2 Nietöffnungen 11 und 12 ausgebildet, die in Laufrichtung LR des Schneidzahns 1 aufeinander folgen. Die Nietöffnung 11 ist eine vorlaufende, vordere Nietöffnung, während die Nietöffnung 12 eine nachlaufende, hintere Nietöffnung ist.The cutting tooth 1 shown in the figures has a main body 2, which consists essentially of a planar board 22. The main body 2 has - as in particular from the side views of the FIGS. 2 and 3 can be seen - an upper edge 31 and a lower foot portion 28 on. In the lower foot area 28 are in the board 22 ( Fig. 1 to 3 ) of the main body 2 rivet openings 11 and 12 are formed, which follow one another in the direction LR of the cutting tooth 1. The rivet opening 11 is a leading, front rivet opening, while the rivet opening 12 is a trailing, rear rivet opening.

Wie in Fig. 2 und 3 gezeigt, weist jede Nietöffnung eine Mittelachse M1 und M2 auf, die in Laufrichtung LR mit einem Nietabstand N zueinander liegen.As in FIGS. 2 and 3 shown, each rivet opening has a central axis M1 and M2, which lie in the direction LR with a rivet spacing N to each other.

Im oberen Rand 31 des Grundkörpers 2 ist eine Spanausnehmung 5 ausgebildet, die sich zwischen einer Ansenkung 30 (Fig. 3) im oberen Rand 31 und einem in Laufrichtung LR vorne liegenden Restflansch 34 erstreckt. Der Restflansch 34 ist aus der Ebene der Platine 22 abgewinkelt, wie die Fig. 1 und 6 deutlich zeigen. Der abgewinkelte Restflansch 34 bildet einen Tiefenbegrenzer 4 des Schneidzahns 1.In the upper edge 31 of the main body 2, a chip recess 5 is formed, which extends between a countersink 30 (FIG. Fig. 3 ) extends in the upper edge 31 and a left in the direction LR residual flange 34. The residual flange 34 is angled out of the plane of the board 22, as the Fig. 1 and 6 clearly show. The angled residual flange 34 forms a depth limiter 4 of the cutting tooth. 1

Die Ansenkung 30 (Fig. 3) ist an ihrem in Laufrichtung LR vorne liegenden Ende zur Spanausnehmung 5 offen, während an ihrem hinteren Ende ein Restabschnitt 35 des oberen Randes 31 einen Anschlag 10 für ein Schneidelement 3 ausbildet.The countersink 30 ( Fig. 3 ) is open at its front in the direction LR end to Spanausnehmung 5, while at its rear end a residual portion 35 of the upper edge 31 forms a stop 10 for a cutting element 3.

Das Schneidelement 3 hat, wie Fig. 7 zeigt, in Laufrichtung LR gesehen eine L-förmige Grundform. Ein auf der Seitenfläche 32 aufliegender Seitenschenkel 27 des Grundkörpers bildet einen Seitenabschnitt 7 des Schneidelements 3; ein winklig zur Seitenfläche 32 liegender Dachschenkel 26 bildet einen Dachabschnitt 6 des Schneidelementes 3.The cutting element 3 has, as Fig. 7 shows, seen in the direction LR an L-shaped basic shape. A resting on the side surface 32 side legs 27 of the body forms a side portion 7 of the cutting element 3; an angle to the side surface 32 lying roof leg 26 forms a roof portion 6 of the cutting element. 3

Die Dachfläche des Dachabschnittes 6 liegt unter einem Winkel 25 von etwa 9° zur Bezugsebene H, wobei der Winkel 25 sich nach vorne in Laufrichtung LR öffnet.The roof surface of the roof section 6 is at an angle 25 of about 9 ° to the reference plane H, wherein the angle 25 opens forward in the direction LR.

Wie insbesondere die Fig. 1, 3 und 4 zeigen, ist an der in Laufrichtung LR vorne liegenden Kante des Dachabschnitts 6 eine Dachschneide 16 ausgebildet; an der in Laufrichtung LR vorne liegenden Kante des Seitenabschnitts 7 ist eine Seitenschneide 17 ausgebildet. Die Seitenschneide 17 ist in Form einer Hohlkehle ausgestaltet.How the particular Fig. 1 . 3 and 4 show, at the front in the direction LR edge of the roof section 6 a roof cutting 16 is formed; on the front in the direction LR edge of the side portion 7 a side cutting edge 17 is formed. The side cutting edge 17 is designed in the form of a groove.

Das Schneidelement 3 besteht aus Hartmetall und wird mittels einer Wärme eintragenden Verbindung wie z. B. Hartlöten stoffschlüssig mit dem Grundkörper 2 des Schneidzahns 1 verbunden.The cutting element 3 is made of hard metal and is by means of a heat-introducing compound such. B. hard soldering materially connected to the main body 2 of the cutting tooth 1.

Wie insbesondere die Fig. 3 und 5 bis 7 zeigen, ist die auf der Seitenfläche 32 aufliegende Fläche 37 des Seitenabschnitts 7 flächig auf der Seitenfläche 32 des Grundkörpers 2 festgelegt; vorzugsweise ist die gesamte Fläche 37 des Seitenabschnitts 7 auf der Fläche 32 des Grundkörpers 2 stoffschlüssig befestigt, z. B. durch Hartlöten festgelegt.How the particular Fig. 3 and 5 to 7 show, resting on the side surface 32 surface 37 of the side portion 7 is set flat on the side surface 32 of the base body 2; Preferably, the entire surface 37 of the side portion 7 is firmly bonded to the surface 32 of the base body 2, z. B. determined by brazing.

Wie Fig. 3 zeigt, liegt der Dachabschnitt 6 in der Ansenkung 30, wobei der Boden 36 der Ansenkung 30 mit der aufliegenden Fläche des Dachabschnitts 6 stoffschlüssig verbunden ist. Bevorzugt ist der Dachabschnitt 6 über die gesamte Bodenfläche 36 mit dem Grundkörper 2 stoffschlüssig verbunden, vorzugsweise hartgelötet.As Fig. 3 shows, the roof section 6 is located in the countersink 30, wherein the bottom 36 of the countersink 30 is materially connected to the overlying surface of the roof section 6. Preferably, the roof portion 6 is integrally connected over the entire bottom surface 36 with the base body 2, preferably brazed.

Wie Fig. 3 zeigt, ist die Länge S der Ansenkung 30 kürzer als die maximale Länge Lmax (Fig. 2) des Schneidelementes 3. Der Schneidzahn 3 ragt somit in die Spanausnehmung 5 ein. Sowohl der Dachabschnitt 6 als auch der Seitenabschnitt 7 ragen in die Spanausnehmung 5 ein.As Fig. 3 shows, the length S of the countersink 30 is shorter than the maximum length L max (FIG. Fig. 2 ) of the cutting element 3. The cutting tooth 3 thus protrudes into the chip recess 5 a. Both the roof section 6 and the side section 7 protrude into the chip recess 5.

Die Randkontur 15 der Spanausnehmung 5 und die in Laufrichtung LR vordere Kontur 13 des Seitenabschnitts 7 des Schneidzahns 3 bilden in Seitenansicht auf den Grundkörper 2 (s. Fig. 3) einen Eckpunkt 8 aus, der innerhalb der Spanausnehmung 5 liegt.The edge contour 15 of the chip recess 5 and the front in the direction of LR contour 13 of the side portion 7 of the cutting tooth 3 form a side view of the base body 2 (s. Fig. 3 ) From a corner 8, which lies within the chip recess 5.

Zur Bestimmung der Lage des Eckpunkts 8 innerhalb des Spanraums 5 wird eine Mittelebene V errichtet, die den Nietabstand N mittig teilt. Die Abstandslinie des Nietabstandes N steht dabei senkrecht auf der Mittelebene V.To determine the position of the corner 8 within the chip space 5, a median plane V is erected which divides the rivet spacing N in the middle. The distance line of the rivet spacing N is perpendicular to the median plane V.

Der Tiefenbegrenzer 4 hat eine die Spanausnehmung 5 begrenzende Hochkante 9 (Fig. 3). Im gezeigten Ausführungsbeispiel liegt diese Hochkante 9 in Seitenansicht im Wesentlichen senkrecht, d. h. die Hochkante 9 steht senkrecht auf einer durch die Mittelachsen M1 und M2 der Nietöffnungen 11, 12 bestimmten Bezugsebene H. Die Hochkante 9 kann auch in Laufrichtung LR geneigt sein, wie strichliert dargestellt ist.The depth limiter 4 has a clamping edge 5 limiting high edge 9 ( Fig. 3 ). In the embodiment shown, this high edge 9 is substantially vertical in side view, ie the high edge 9 is perpendicular to a reference plane H determined by the center axes M1 and M2 of the rivet openings 11, 12. The high edge 9 may also be inclined in the direction LR, as shown in dashed lines is.

Der von der Kontur 13 des Seitenabschnitts 7 und der Kontur 15 der Spanausnehmung 5 gebildete Eckpunkt 8 liegt mit einem Abstand A zu der Hochkante 9. Die Mittelebene V liegt mit einem Abstand B zu der Hochkante 9. Dabei ist die Geometrie so gewählt, dass der Abstand A kleiner ist als der Abstand B. Die Hochachse 9 liegt in Laufrichtung LR vor der Mittelachse M1 der vorderen Nietöffnung 11. Dies ist in der Seitenansicht nach Fig. 3 dargestellt.The corner point 8 formed by the contour 13 of the side section 7 and the contour 15 of the chip recess 5 lies at a distance A from the top edge 9. The center plane V lies at a distance B from the top edge 9. The geometry is selected so that the Distance A is smaller than the distance B. The vertical axis 9 lies in the direction LR in front of the central axis M1 of the front rivet opening 11. This is in the side view Fig. 3 shown.

Wie in Fig. 3 weiter gezeigt, erfolgt die Messung der Abstände A und B in Laufrichtung LR des Schneidzahns 1. Dabei wird der in Laufrichtung LR gemessene Abstand A bzw. B von einem gleichen Abstandspunkt 39 zur Mittelebene V gemessen. Liegt die Hochkante 9 - wie strichliert mit dem Bezugszeichen 9' angedeutet - z. B. in Laufrichtung LR geneigt, so ergeben sich bezogen auf einen Abstandspunkt 39' der geneigten Hochkante 9' die gleichen Abstandsverhältnisse wie bei einer lotrecht zur Bezugsebene H liegenden Hochkante 9.As in Fig. 3 Furthermore, the measurement of the distances A and B in the running direction LR of the cutting tooth 1. The distance A or B measured in the running direction LR is measured from the same distance point 39 to the center plane V. Is the high edge 9 - as indicated by dashed lines with the reference numeral 9 '- z. B. inclined in the direction of LR, so arise based on a distance point 39 'of the inclined high edge 9', the same spacing conditions as in a plane perpendicular to the reference plane H high edge. 9

Die konstruktive Gestaltung und Auslegung des Schneidzahns stellt eine hohe Betriebssicherheit über einen langen Betriebszeitraum sicher, wobei der Schneidzahn 3 über eine maximale Fläche mit der ebenen Platine 22 des Grundkörpers 2 stoffschlüssig verbunden ist, z. B. durch Hartlot, insbesondere durch Silberlot.The structural design and design of the cutting tooth ensures a high level of operational reliability over a long period of operation, wherein the cutting tooth 3 is materially connected over a maximum area with the planar board 22 of the base body 2, z. B. by brazing, in particular by silver solder.

Entgegen der Laufrichtung LR wird der Schneidzahn 3 an einem Anschlag 10 abgestützt, an dem der Dachabschnitt 6 des Schneidelementes 3 entgegen der Laufrichtung LR anliegt. Der Anschlag 10 bildet das in Laufrichtung LR hintere Ende der Ansenkung 30. Das den Anschlag 10 aufweisende Ende liegt vom Tiefenbegrenzer 4 abgewandt. Die Fläche des Anschlags 10 liegt - in Laufrichtung gesehen - hinter der nachlaufenden Nietöffnung 12; zweckmäßig hat - in Seitenansicht auf den Grundkörper 2 gesehen - der Anschlag 10 einen in Laufrichtung LR gemessenen Abstand 19 zur Nietöffnung 12.Contrary to the running direction LR, the cutting tooth 3 is supported on a stop 10, against which the roof section 6 of the cutting element 3 abuts against the running direction LR. The stop 10 forms the rear in the running direction LR end of the countersink 30. The stop 10 having the end facing away from the depth limiter 4. The surface of the stop 10 is - seen in the running direction - behind the trailing rivet opening 12; expediently - seen in a side view of the main body 2 - the stop 10 has a measured in the direction LR distance 19 to the rivet opening 12th

Die Ansenkung 30 erstreckt sich entgegen der Laufrichtung LR des Schneidzahns 3 bis über das hintere Nietloch 12 hinaus nach hinten, so dass ein nur kleiner Restabschnitt 35 des oberen Randes 31 mit einer Restlänge R verbleibt.The counterbore 30 extends counter to the running direction LR of the cutting tooth 3 to the rear beyond the rear rivet hole 12 so that only a small remaining portion 35 of the upper edge 31 with a residual length R remains.

Zweckmäßig ist die Gestaltung des Grundkörpers 2 und des Schneidelementes 3 derart aufeinander abgestimmt, dass der erste Abstand A des Eckpunktes 8 vom Abstandspunkt 39 bzw. 39' das 0,5fache bis 0,8fache des zweiten Abstandes B des Abstandspunktes 39 bzw. 39' von der Mittelebene V beträgt. In einer optimierten Ausführungsform des Schneidzahns 1 wird der erste Abstand A derart gewählt, dass er das 0,6fache bis 0,7fache des zweiten Abstandes beträgt. Eine zweckmäßige Ausführung wird erzielt, wenn der erste Abstand A das 0,65fache des zweiten Abstands B beträgt.Appropriately, the design of the base body 2 and the cutting element 3 is coordinated such that the first distance A of the corner 8 from the distance point 39 and 39 '0.5 times to 0.8 times the second distance B of the distance point 39 and 39' of the median plane V is. In an optimized embodiment of the cutting tooth 1, the first distance A is chosen such that it is 0.6 times to 0.7 times the second distance. An expedient embodiment is achieved when the first distance A is 0.65 times the second distance B.

Die sich in Laufrichtung LR erstreckende Ansenkung 30 im oberen Rand 31 hat eine Länge S, die etwa 70% bis 90% der Abschnittslänge des oberen Randes 31 entspricht, der sich zwischen der Spanausnehmung 5 und der hinteren Abschlusskante 38 des Grundkörpers 2 erstreckt.The extending in the direction of LR counterbore 30 in the upper edge 31 has a length S, which corresponds to about 70% to 90% of the section length of the upper edge 31 extending between the chip recess 5 and the rear end edge 38 of the body 2.

Die konstruktive Gestaltung ist derart ausgelegt, dass die in Laufrichtung LR gemessene maximale Länge Lmax des Schneidelementes 3 etwa 70% bis 100% des Abstandes N der Mittelachsen M1 und M2 der Nietöffnungen 11 und 12 voneinander beträgt. Eine vorteilhafte Ausgestaltung wird erreicht, wenn die in Laufrichtung LR gemessene Länge Lmax etwa 90% des Nietabstandes N beträgt.The constructive design is designed such that the measured in the direction LR maximum length L max of the cutting element 3 is about 70% to 100% of the distance N of the center axes M1 and M2 of the rivet openings 11 and 12 from each other. An advantageous embodiment is achieved when the measured length L max in the direction LR is about 90% of the rivet spacing N.

Die Geometrie des Schneidelementes 3 ist ferner so ausgelegt, dass das Verhältnis einer senkrecht zur Laufrichtung gemessenen maximalen Höhe Hmax des Schneidelementes 3 zu einer in Laufrichtung LR gemessenen maximalen Länge Lmax des Schneidelementes 3 im Bereich von 0,4 bis 0,5 liegt, wie in Fig. 2 dargestellt. Eine optimale Gestaltung ist erzielt, wenn ein Verhältnis von 0,46 eingestellt ist.The geometry of the cutting element 3 is further designed such that the ratio of a maximum height H max of the cutting element 3 measured perpendicular to the running direction to a maximum length L max of the cutting element 3 measured in the running direction LR is in the range from 0.4 to 0.5, as in Fig. 2 shown. An optimal design is achieved when a ratio of 0.46 is set.

Fig. 2 zeigt weiter, dass der Seitenabschnitt 7 eine den Nietöffnungen 11, 12 zugewandt liegende, sich in Laufrichtung LR erstreckende untere Längskante 14 aufweist, die sich über die Länge Lmax des Schneidelementes 3 erstreckt. Zweckmäßig liegt die untere Längskante 8 unter einem Winkel 23 von 0,5° bis 2° zu der Bezugsebene H durch die Mittelachsen M1 und M2 der Nietöffnungen 11 und 12. Die untere Längskante 8 des Seitenabschnitts begrenzt eine Fase 18, die an dem unteren Ende des Seitenabschnitts 7 ausgebildet ist und sich in Laufrichtung LR erstreckt. Fig. 2 shows that the side portion 7 has a rivet openings 11, 12 facing, extending in the direction LR lower longitudinal edge 14 which extends over the length L max of the cutting element 3. Suitably, the lower longitudinal edge 8 is at an angle 23 of 0.5 ° to 2 ° to the reference plane H through the center axes M1 and M2 of the rivet openings 11 and 12. The lower longitudinal edge 8 of the side portion defines a chamfer 18 at the lower end of the side portion 7 is formed and extends in the running direction LR.

Der Abstand E zwischen der Mittelachse M2 der in Laufrichtung LR nachlaufenden, hinteren Nietöffnung 12 und dem Eckpunkt 8 in der Spanausnehmung 5 ist so gewählt, dass der Abstand E etwa 85% bis 110% des in Laufrichtung LR gemessenen Nietabstandes N der Mittelachsen M1 und M2 der Nietöffnungen 11 und 12 beträgt. Zweckmäßig wird der Abstand E mit 95% des Nietabstandes N gewählt.The distance E between the center axis M2 of the trailing in the direction LR rear rivet opening 12 and the corner 8 in the chip recess 5 is selected so that the distance E about 85% to 110% of the measured in the direction LR rivet spacing N of the central axes M1 and M2 the rivet openings 11 and 12 amounts to. The distance E is expediently selected to be 95% of the rivet spacing N.

Die Abstandslinie 20 zwischen der Mittelachse M1 der hinteren Nietöffnung 12 und dem Eckpunkt 8 in der Spanausnehmung 5 bildet mit der Bezugsebene H einen Winkel 23 zwischen 35° und 40°. Insbesondere wird die Lage des Eckpunktes 8 derart gewählt, dass der Winkel 23 eine Größe von etwa 37° hat.The distance line 20 between the central axis M1 of the rear rivet opening 12 and the corner 8 in the chip recess 5 forms with the reference plane H an angle 23 between 35 ° and 40 °. In particular, the position of the corner point 8 is selected such that the angle 23 has a size of about 37 °.

Der aus der Ebene der Platine 22 des Grundkörpers 2 ausgebogene Tiefenbegrenzer 4 ist um einen Winkel 24 von etwa 10° bis 15°, insbesondere 12° abgewinkelt. Im gezeigten Ausführungsbeispiel ist der Tiefenbegrenzer 4 einteilig mit dem Grundkörper 2 ausgebildet.The excavated from the plane of the board 22 of the base body 2 depth limiter 4 is angled at an angle 24 of about 10 ° to 15 °, in particular 12 °. In the embodiment shown, the depth limiter 4 is formed integrally with the base body 2.

Claims (14)

Schneidzahn (1) für eine Sägekette, bestehend aus einem Grundkörper (2) mit einem am Grundkörper (2) befestigten Schneidelement (3) aus Hartmetall, wobei der Grundkörper (2) einen oberen Rand (31) und einen unteren Fußbereich (28) aufweist und im unteren Fußbereich (28) des Grundkörpers (2) Nietöffnungen (11, 12) ausgebildet sind, die in Laufrichtung (LR) des Schneidzahns (1) aufeinander folgen und eine vordere Nietöffnung (11) und eine hintere Nietöffnung (12) bilden, wobei in Laufrichtung (LR) vor dem Schneidelement (3) am Grundkörper (2) ein Tiefenbegrenzer (4) vorgesehen ist, und das Schneidelement (3) aus Hartmetall einen Dachabschnitt (6) mit einer Dachschneide (16) sowie einen Seitenabschnitt (7) mit einer Seitenschneide (17) aufweist und der Seitenabschnitt (7) auf einer Seitenfläche (32) des Grundkörpers (2) und der Dachabschnitt (6) in einer Ansenkung (30) im oberen Rand (31) des Grundkörpers (2) aufliegt, und mit einer zwischen der Ansenkung (30) und dem Tiefenbegrenzer (4) im Grundkörper (2) ausgebildeten Spanausnehmung (5) zur Spanableitung, wobei das Schneidelement (3) in Laufrichtung (LR) in die Spanausnehmung (5) einragt und in Seitenansicht auf den Grundkörper (2) eine vordere Kontur (14) des Seitenabschnitts (7) und die Innenkontur (15) der Spanausnehmung (5) einen in der Spanausnehmung (5) liegenden Eckpunkt (8) bilden, und das Schneidelement (3) mit dem Grundkörper (2) mittels einer Wärme eintragenden Verbindung stoffschlüssig verbunden ist, wobei die Mittelachsen (M1, M2) der Nietöffnungen (11, 12) einen Nietabstand (N) voneinander aufweisen, der durch eine Mittelebene (V) mittig geteilt ist, wobei der Nietabstand (N) lotrecht zur Mittelebene (V) liegt,
dadurch gekennzeichnet, dass der Eckpunkt (8) mit einem ersten Abstand (A) zu einer die Spanausnehmung (5) begrenzenden Hochkante (9) des Tiefenbegrenzers (4) liegt, der kleiner ist als ein zweiter Abstand (B) der Mittelebene (V) zu der Hochkante (9) des Tiefenbegrenzers (4), und dass die Hochkante (9) des Tiefenbegrenzers (4) in Laufrichtung (LR) vor der Mittelachse (M1) der in Laufrichtung (LR) vorderen Nietöffnung (11) liegt.Cutting tooth (1) for a saw chain, comprising a base body (2) with a cutting element (3) made of hard metal attached to the base body (2), the base body (2) having an upper edge (31) and a lower foot region (28) and in the lower foot region (28) of the main body (2) rivet openings (11, 12) are formed, which follow one another in the running direction (LR) of the cutting tooth (1) and form a front rivet opening (11) and a rear rivet opening (12), wherein a depth limiter (4) is provided in the running direction (LR) in front of the cutting element (3) on the base body (2), and the cutting element (3) made of hard metal has a roof section (6) with a roof cutting edge (16) and a side section (7) with a side cutting edge (17) and the side portion (7) on a side surface (32) of the base body (2) and the roof portion (6) in a countersink (30) in the upper edge (31) of the base body (2) rests, and with one between the countersink (30) and the depth nbegrenzer (4) in the base body (2) formed Spanausnehmung (5) for Chipableitung, wherein the cutting element (3) in the direction of travel (LR) in the chip recess (5) protrudes and in side view of the base body (2) has a front contour (14) of the side section (7) and the inner contour (15) of the chip recess (5) form a corner point (8) located in the chip recess (5), and the cutting element (3) is materially connected to the base body (2) by means of a heat-introducing connection in which the center axes (M1, M2) of the rivet openings (11, 12) have a rivet spacing (N) from each other, which is divided centrally by a median plane (V), the rivet spacing (N) being perpendicular to the median plane (V),
characterized in that the corner point (8) with a first distance (A) to a chip recess (5) delimiting high edge (9) of the depth limiter (4) is smaller than a second distance (B) of the median plane (V) to the high edge (9) of the depth limiter (4), and that the high edge (9) of the depth limiter (4) in the direction of travel (LR) in front of the central axis (M1) of the front in the running direction (LR) rivet opening (11). Schneidzahn nach Anspruch 1,
dadurch gekennzeichnet, dass der erste Abstand (A) das 0,5fache bis 0,8fache des zweiten Abstandes (B) beträgt.Cutting tooth according to claim 1,
characterized in that the first distance (A) is 0.5 times to 0.8 times the second distance (B). Schneidzahn nach Anspruch 2,
dadurch gekennzeichnet, dass der erste Abstand (A) das 0,6fache bis 0,7fache insbesondere etwa das 0,65fache des zweiten Abstandes (B) beträgt.Cutting tooth according to claim 2,
characterized in that the first distance (A) is 0.6 times to 0.7 times, in particular about 0.65 times the second distance (B). Schneidzahn nach Anspruch 1,
dadurch gekennzeichnet, dass die Ansenkung (30) eine in Laufrichtung (LR) gemessene Länge (S) aufweist, die 70% bis 90% einer Abschnittslänge des oberen Randes (31) entspricht, die sich zwischen der Spanausnehmung (5) und der in Laufrichtung (LR) hinteren Abschlusskante (38) des Grundkörpers (2) erstreckt.Cutting tooth according to claim 1,
characterized in that the countersink (30) has a length (S) measured in the running direction (LR) which corresponds to 70% to 90% of a section length of the upper edge (31) extending between the chip recess (5) and in the running direction (LR) rear end edge (38) of the base body (2). Schneidzahn nach Anspruch 4,
dadurch gekennzeichnet, dass die Ansenkung (30) ein Ende aufweist, das von dem Tiefenbegrenzer (4) abgewandt liegt und einen Anschlag (10) bildet, an dem der Dachabschnitt (6) des Schneidelementes (3) anliegt und entgegen der Laufrichtung (LR) abgestützt ist.Cutting tooth according to claim 4,
characterized in that the countersink (30) has an end which faces away from the depth limiter (4) and forms a stop (10) on which the roof section (6) of the cutting element (3) rests and against the running direction (LR) is supported. Schneidzahn nach Anspruch 4 oder 5,
dadurch gekennzeichnet, dass das hintere Ende des Schneidelementes (3) in Laufrichtung (LR) nach dem hinteren Nietloch (12) endet.Cutting tooth according to claim 4 or 5,
characterized in that the rear end of the cutting element (3) in the direction of travel (LR) ends after the rear rivet hole (12). Schneidzahn nach Anspruch 1,
dadurch gekennzeichnet, dass die in Laufrichtung (LR) gemessene Länge (Lmax) des Schneidelementes (3) 70% bis 100% des Nietabstandes (N) der Mittelachsen (M1, M2) der Nietöffnungen (11, 12) voneinander beträgt, insbesondere 90% des Nietabstandes (N) beträgt.Cutting tooth according to claim 1,
characterized in that in the running direction (LR) measured length (L max ) of the cutting element (3) is 70% to 100% of the Nietabstandes (N) of the center axes (M1, M2) of the rivet openings (11, 12) from each other, in particular 90 % of rivet spacing (N). Schneidzahn nach Anspruch 7,
dadurch gekennzeichnet, dass das Verhältnis einer senkrecht zur Laufrichtung (LR) gemessenen maximalen Höhe (Hmax) des Schneidelementes (3) zu einer in Laufrichtung (LR) gemessenen maximalen Länge (Lmax) des Schneidelementes (3) im Bereich von 0,4 bis 0,5 liegt, insbesondere 0,46 ist.Cutting tooth according to claim 7,
characterized in that the ratio of a measured perpendicular to the running direction (LR) maximum height (H max ) of the cutting element (3) in the running direction (LR) measured maximum length (L max ) of the cutting element (3) in the range of 0.4 is up to 0.5, in particular 0.46. Schneidzahn nach Anspruch 1,
dadurch gekennzeichnet, dass der Seitenabschnitt (7) eine den Nietöffnungen (11, 12) zugewandt liegende, sich in Laufrichtung (LR) erstreckende untere Längskante (14) aufweist, die sich über die Länge (Lmax) des Schneidelementes (3) erstreckt und unter einem Winkel (23) von 0,5° bis 2° zu der Bezugsebene (H) durch die Mittelachsen (M1, M2) der Nietöffnungen (11, 12) liegt.Cutting tooth according to claim 1,
characterized in that the side section (7) has a lower longitudinal edge (14) facing the rivet openings (11, 12) and extending in the running direction (LR), which extends over the length (L max ) of the cutting element (3) and at an angle (23) of 0.5 ° to 2 ° to the reference plane (H) through the center axes (M1, M2) of the rivet openings (11, 12). Schneidzahn nach Anspruch 1,
dadurch gekennzeichnet, dass der Abstand (E) zwischen der Mittelachse (M2) der in Laufrichtung (LR) nachlaufenden, hinteren Nietöffnung (12) und dem Eckpunkt (8) in der Spanausnehmung (5) 85% bis 110% des in Laufrichtung (LR) gemessenen Nietabstandes (N) der Mittelachsen (M1, M2) der Nietöffnungen (11, 12) beträgt, insbesondere 95% des Nietabstandes (N) aufweist.Cutting tooth according to claim 1,
characterized in that the distance (E) between the central axis (M2) in the running direction (LR) trailing, rear rivet opening (12) and the corner (8) in the chip recess (5) 85% to 110% of the running direction (LR ) measured Nietabstandes (N) of the central axes (M1, M2) of the rivet openings (11, 12), in particular 95% of the rivet spacing (N). Schneidzahn nach Anspruch 10,
dadurch gekennzeichnet, dass die Abstandslinie (20) zwischen der Mittelachse (M2) der hinteren Nietöffnung (12) und dem Eckpunkt (8) in der Spanausnehmung (5) mit der Bezugsebene (H) einen Winkel (23) zwischen 35° und 40° einschließt, insbesondere einen Winkel (23) von 37° einschließt.Cutting tooth according to claim 10,
characterized in that the distance line (20) between the central axis (M2) of the rear rivet opening (12) and the corner point (8) in the chip recess (5) with the reference plane (H) includes an angle (23) between 35 ° and 40 °, in particular an angle (23) of 37 °. Schneidzahn nach einem der Ansprüche 1 bis 11,
dadurch gekennzeichnet, dass der Tiefenbegrenzer (4) einteilig mit dem Grundkörper (2) als vom Grundkörper (2) abgebogener Restflansch (34) ausgebildet ist.Cutting tooth according to one of claims 1 to 11,
characterized in that the depth limiter (4) is integrally formed with the base body (2) as the main body (2) bent residual flange (34). Schneidzahn nach einem der Ansprüche 1 bis 11,
dadurch gekennzeichnet, dass der Grundkörper (2) eine ebene Platine (22) ist.Cutting tooth according to one of claims 1 to 11,
characterized in that the base body (2) is a planar board (22). Schneidzahn nach Anspruch 13,
dadurch gekennzeichnet, dass der Tiefenbegrenzer (4) aus der Platine (22) abgewinkelt ist.Cutting tooth according to claim 13,
characterized in that the depth limiter (4) is angled away from the board (22).
EP14004127.8A 2013-12-14 2014-12-06 Cutting tooth for a saw chain Active EP2883669B1 (en)

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DE102013021170.0A DE102013021170A1 (en) 2013-12-14 2013-12-14 Cutting tooth for a saw chain

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EP2883669B1 EP2883669B1 (en) 2016-06-01

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US (1) US20150183124A1 (en)
EP (1) EP2883669B1 (en)
CN (1) CN104708676B (en)
DE (1) DE102013021170A1 (en)
RU (1) RU2668573C2 (en)

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Also Published As

Publication number Publication date
EP2883669B1 (en) 2016-06-01
RU2014149678A (en) 2016-07-10
DE102013021170A1 (en) 2015-06-18
US20150183124A1 (en) 2015-07-02
RU2014149678A3 (en) 2018-07-31
CN104708676B (en) 2019-11-15
CN104708676A (en) 2015-06-17
RU2668573C2 (en) 2018-10-02

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