EP1481750B9 - Saw with oscillating rotative driving motion and saw blade therefor - Google Patents

Saw with oscillating rotative driving motion and saw blade therefor Download PDF

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Publication number
EP1481750B9
EP1481750B9 EP20040010149 EP04010149A EP1481750B9 EP 1481750 B9 EP1481750 B9 EP 1481750B9 EP 20040010149 EP20040010149 EP 20040010149 EP 04010149 A EP04010149 A EP 04010149A EP 1481750 B9 EP1481750 B9 EP 1481750B9
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EP
European Patent Office
Prior art keywords
saw blade
saw
cutting edge
drive shaft
coating
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.)
Expired - Lifetime
Application number
EP20040010149
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German (de)
French (fr)
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EP1481750B1 (en
EP1481750A1 (en
Inventor
Walter Thomaschewski
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C&E Fein GmbH and Co
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C&E Fein GmbH and Co
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Publication of EP1481750A1 publication Critical patent/EP1481750A1/en
Publication of EP1481750B1 publication Critical patent/EP1481750B1/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
    • B27B19/00—Other reciprocating saws with power drive; Fret-saws
    • B27B19/006—Other reciprocating saws with power drive; Fret-saws with oscillating saw blades; Hand saws with oscillating saw blades
    • 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
    • Y10T83/929—Tool or tool with support
    • Y10T83/9372—Rotatable type
    • Y10T83/9377—Mounting of tool about rod-type shaft
    • Y10T83/9379—At end of shaft

Definitions

  • the invention relates to a saw blade for a saw with navoszillierendem drive, with a mounting portion having a matched to a recording of the drive shaft mounting opening for positive or non-positive connection with the drive shaft which is rotationally oscillating about its longitudinal axis driven, and with a working section on a cutting edge is provided with a sequence of saw teeth, wherein at least the cutting edge consists of bimetal.
  • the invention further relates to a saw with a rotary oscillating drive movement with such a saw blade.
  • a saw blade according to the aforementioned type is known from DE 297 20 605 known.
  • the known saw blade is formed as an elongated saw blade, which is used in a lifting saw. Furthermore, a circular saw blade is known from this document.
  • a saw blade and a saw are known with a rotary oscillating drive movement with a saw blade with a mounting portion having a mounting opening for connection to a drive shaft which is driven to oscillate about its longitudinal axis, and with a working portion, on which a cutting edge with a sequence provided by saw teeth.
  • Such saw blades are driven by a rotary oscillation drive, the drive shaft is driven to oscillate at high frequency in the range between about 5,000 and 25,000 oscillations per minute and with a small pivot angle between about 0.5 ° to 7 ° about its longitudinal axis.
  • saw blades can perform special sawing tasks in conjunction with the oscillating drive, such as sawing work on body parts or sawing about hard to reach places.
  • Such saw blades are now used for a variety of sawing, such as for sawing wood, putty and soft materials, but also for sawing fiberglass, CFRP and sheet relatively low strength. You can make cuts at right angles without over cutting. Furthermore, sawing can be made in hard to reach places and special recesses on wood, plasterboard and many plastics.
  • a saw blade for a rotational oscillating movement with an elongated design which has a mounting opening for positive connection with a drive shaft, and a cutting edge on a mounting opening opposite the working portion.
  • the known saw blade is used in the medical field in particular for the removal of plaster casts and has a stop for limiting the penetration depth
  • the invention has for its object to provide a saw blade, which is used in conjunction with a rotary oscillation drive to perform cuts in hard to reach places.
  • a saw blade which is used in conjunction with a rotary oscillation drive to perform cuts in hard to reach places.
  • the widest possible scope is to be created and in particular an insert for different materials to be possible without the saw blade must be changed.
  • a saw should be specified with such a saw blade.
  • the working portion on at least one surface, preferably on both surfaces has a coating with an abrasive material, preferably a coating with diamond abrasive particles or carbide abrasive particles.
  • the coating preferably adjoins the cutting edge.
  • This measure has the advantage that a saw cut can be made such that the cut material does not require any post-processing by grinding or the like.
  • the cutting edge in an advantageous development of the invention, has a setting, preferably a wave restriction.
  • the saw blade has an elongated shape, wherein the attachment portion extending from one end to the working section at an opposite end.
  • cuts can be made under spatially limited conditions.
  • cutouts on wood panels or wood profiles, on articles made of plastic, plasterboard and the like can be made more easily, which is particularly advantageous in construction technology.
  • the working section of the saw blade may have a curved cutting edge, wherein the center of curvature may advantageously lie in the center of the fastening opening. In this way, a particularly low-vibration cut can be performed.
  • the saw blade may also have a circular or part-circular cutting edge. In this way, longer and deeper cuts can be generated in a relatively simple manner.
  • the working section has an at least sectionally straight cutting edge, which if necessary can also have a plurality of mutually angled sections.
  • the attachment opening of the saw blade is designed for positive connection with the drive shaft.
  • the saw blade on a cranked design.
  • FIGS. 1 and 3 show saw blades, as in the basic form of the EP-A-0 881 023 already known.
  • FIG. 4 shows a circular, cranked saw blade, which is also already known in principle in the prior art.
  • the saw blades according to the FIGS. 1 and 3 according to the invention have additional coatings 19 and 19a with diamond or carbide abrasive particles.
  • the saw blades described herein are all specifically designed for attachment to the free end of a drive shaft of an oscillating drive.
  • FIG. 2 shows such a saw 40, which has an oscillating drive 42.
  • the oscillation drive drives a drive shaft 44 with a high frequency of, for example, 5,000 to 25,000 oscillations per minute and a small pivot angle of z. B. 0.5 ° to 7 ° about the longitudinal axis 46 of the drive shaft back and forth swinging, as indicated by the double arrow 49.
  • a receptacle for the saw blade On the free end of the drive shaft 44, a receptacle for the saw blade is provided, to which this can be plugged and by means of a fastening element 48, for. B. a screw can be attached.
  • the saw blades according to the invention now consist of bimetal, at least in the region of their cutting edges.
  • the saw blade generally designated by the numeral 10 has a planar, elongated design and has at one end a mounting portion 12 in which a star-shaped mounting opening 14 is provided for positive connection with the drive shaft 44 of the oscillating drive 42.
  • the attachment portion 12 extends to a working portion 16 at the opposite end.
  • saw teeth cutting edge 18 is formed on the outer edge, which runs straight in the illustrated embodiment.
  • the cutting edge 18 can of course also be curved or multiply angled.
  • the entire saw blade 10 is made of a bimetal blank. It can, for. B. from the bimetallic blank z. B. by punching (possibly including the saw teeth) may be formed. After a suitable heat treatment for hardening or tempering the saw blade 10, the saw teeth of the cutting edge 18 can be resharpened if necessary by grinding.
  • the saw blade 10 according to FIG. 1 provided in its immediately adjacent to the cutting edge 18 region on both sides with a device 19, which preferably contains diamond abrasive particles.
  • a device 19 which preferably contains diamond abrasive particles.
  • the coating could include, for example, fine-grained carbide Schleitfpitate.
  • FIGS. 2 and 3 is a modified design of a saw blade according to the invention designated by the numeral 20.
  • the saw blade 20 according to the FIGS. 2 and 3 has a mounting portion 12a with a round fastening opening 14a and widens from the mounting portion 12a at an angle of about 30 ° to the working portion 16a at the opposite end.
  • a straight cutting edge 18a is provided at the outer end of the working portion 16a.
  • a crank 22a is provided at the transition between the attachment portion 12a and the working portion 16a.
  • the area between the cutting edge 18a and the crank 22a is in turn provided on both sides with a coating of diamond D126.
  • FIG. 4 shows a modified design of a saw blade 30 which is circular and in the
  • Center carries a mounting portion 12b with a circular mounting hole 14b.
  • a crank 22b is provided at the transition between the mounting portion 12b and the working portion 16b.
  • the cutting edge 18b is formed as a circular cutting edge with saw teeth on the outer edge of the working portion 16b.
  • the working portion 16b of bimetal while the mounting portion 12b including the crank 22b of a normal steel sheet, for. B. tool steel, is made without a coating according to the invention is applied to an abrasive material.
  • the working section 16b made of bimetal can be connected, for example, to the fastening section 12b in the region of the crank 22b by laser welding.
  • FIGS. 5 and 6 two further embodiments of the invention are generally designated by the numbers 40 and 50, respectively.
  • the saw blade 40 has at its attachment portion 12c two mutually parallel slots 14c and 15c, which open outward. This facilitates attachment to a correspondingly shaped holder, such as from EP-A-1 208 950 known. From the attachment portion 12c, the saw blade 40 tapers on both sides to a narrower working portion 16c. At the outer end of the working portion 16c, a cutting edge 18c made of bimetal is soldered or welded. In turn, the working section 16c is provided on both sides in its region immediately adjacent to the cutting edge 18c with a coating 19c of the diamond D 126 type.
  • the saw blade 50 largely corresponds to the in FIG. 5 The only difference is that the saw blade 50 has a uniform width from the mounting portion 12d to the working portion 16d due to a wider cutting edge 18d.
  • FIG. 7 a cutting edge 18e is shown enlarged from the front.
  • the cutting edge has a setting in the form of a so-called wave restriction.
  • the teeth 17e "flow" around the center line of the blade alternately to one side and the other side.
  • Such a setting is particularly suitable for sawing even thin-walled sheets and profiles.
  • all cutters 18, 18a, 18b, 18c, 18d are provided with such a set. This significantly increases the number of possible materials to be sawn.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Sawing (AREA)

Description

Die Erfindung betrifft ein Sägeblatt für eine Säge mit drehoszillierendem Antrieb, mit einem Befestigungsabschnitt, der eine auf eine Aufnahme der Antriebswelle abgestimmte Befestigungsöffnung zur form- oder kraftschlüssigen Verbindung mit der Antriebswelle aufweist, die um ihre Längsachse drehoszillierend antreibbar ist, und mit einem Arbeitsabschnitt, an dem eine Schneide mit einer Folge von Sägezähnen vorgesehen ist, wobei zumindest die Schneide aus Bimetall besteht.The invention relates to a saw blade for a saw with drehoszillierendem drive, with a mounting portion having a matched to a recording of the drive shaft mounting opening for positive or non-positive connection with the drive shaft which is rotationally oscillating about its longitudinal axis driven, and with a working section on a cutting edge is provided with a sequence of saw teeth, wherein at least the cutting edge consists of bimetal.

Die Erfindung betrifft ferner eine Säge mit einer drehoszillierenden Antriebsbewegung mit einem derartigen Sägeblatt.The invention further relates to a saw with a rotary oscillating drive movement with such a saw blade.

Ein Sägeblatt gemäß der vorstehend genannten Art ist aus der DE 297 20 605 bekannt.A saw blade according to the aforementioned type is known from DE 297 20 605 known.

Das bekannte Sägeblatt ist als ein längliches Sägeblatt ausgebildet, das bei einer Hubsäge verwendet wird. Ferner ist aus diesem Dokument ein Kreissägeblatt bekannt.The known saw blade is formed as an elongated saw blade, which is used in a lifting saw. Furthermore, a circular saw blade is known from this document.

Aus der ES 0 881 023 A sind ferner ein Sägeblatt und eine Säge sind mit einer drehoszillierenden Antriebsbewegung mit einem Sägeblatt mit einem Befestigungsabschnitt bekannt, der eine Befestigungsöffnung zur Verbindung mit einer Antriebswelle aufweist, die um ihre Längsachse oszillierend angetrieben ist, und mit einem Arbeitsabschnitt, an dem eine Schneide mit einer Folge von Sägezähnen vorgesehen ist.From the ES 0 881 023 A Further, a saw blade and a saw are known with a rotary oscillating drive movement with a saw blade with a mounting portion having a mounting opening for connection to a drive shaft which is driven to oscillate about its longitudinal axis, and with a working portion, on which a cutting edge with a sequence provided by saw teeth.

Solche Sägeblätter werden von einem Drehoszillationsantrieb angetrieben, dessen Antriebswelle mit hoher Frequenz im Bereich zwischen etwa 5.000 und 25.000 Schwingungen pro Minute und mit kleinem Verschwenkwinkel zwischen etwa 0,5° bis 7° um ihre Längsachse oszillierend angetrieben ist.Such saw blades are driven by a rotary oscillation drive, the drive shaft is driven to oscillate at high frequency in the range between about 5,000 and 25,000 oscillations per minute and with a small pivot angle between about 0.5 ° to 7 ° about its longitudinal axis.

Mit derartigen Sägeblättern lassen sich in Verbindung mit dem Oszillationsantrieb spezielle Sägeaufgaben durchführen, etwa Sägearbeiten an Karosseriebauteilen oder etwa Sägearbeiten an schwer zugänglichen Stellen. Derartige Sägeblätter werden inzwischen für vielfältige Sägearbeiten eingesetzt, etwa zum Sägen von Holz, Kitt und weichen Materialien, jedoch auch zum Sägen von GFK, CFK und Blech relativ geringer Stärke. Es können Schnitte im rechten Winkel ohne Überschnitt durchgeführt werden. Ferner können Sägearbeiten an schwer zugänglichen Stellen und spezielle Aussparungen an Holz, Gipskarton und vielen Kunststoffen erzeugt werden.With such saw blades can perform special sawing tasks in conjunction with the oscillating drive, such as sawing work on body parts or sawing about hard to reach places. Such saw blades are now used for a variety of sawing, such as for sawing wood, putty and soft materials, but also for sawing fiberglass, CFRP and sheet relatively low strength. You can make cuts at right angles without over cutting. Furthermore, sawing can be made in hard to reach places and special recesses on wood, plasterboard and many plastics.

Je nach zu sägendem Werkstoff müssen hierbei unterschiedliche Sägeblätter verwendet werden.Depending on the material to be sawn, different saw blades must be used.

Dies ist nachteilig, da das Wechseln der Sägeblätter Zeit erfordert. Außerdem werden für derartige Sägearbeiten möglichst standfeste Sägeblätter gefordert, die nicht häufig gewechselt werden müssen.This is disadvantageous because the changing of the saw blades requires time. In addition, as stable as possible saw blades are required for such sawing, which need not be changed frequently.

Aus der DE 38 33 735 A ist ferner ein Sägeblatt für eine drehoszillierende Bewegung mit einer länglichen Bauform bekannt, die eine Befestigungsöffnung zur formschlüssigen Verbindung mit einer Antriebswelle aufweist, sowie eine Schneide an einem der Befestigungsöffnung gegenüber liegenden Arbeitsabschnitt. Das bekannte Sägeblatt wird im medizinischen Bereich insbesondere zur Entfernung von Gipsverbänden verwendet und weist einen Anschlag zur Begrenzung der Eindringtiefe aufFrom the DE 38 33 735 A Furthermore, a saw blade for a rotational oscillating movement with an elongated design is known which has a mounting opening for positive connection with a drive shaft, and a cutting edge on a mounting opening opposite the working portion. The known saw blade is used in the medical field in particular for the removal of plaster casts and has a stop for limiting the penetration depth

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, ein Sägeblatt zu schaffen, das in Verbindung mit einem Drehoszillationsantrieb verwendbar ist, Schnitte an schwer zugänglichen Stellen ausführen zu können. Hierbei soll ein möglichst breiter Anwendungsbereich geschaffen werden und insbesondere ein Einsatz für verschiedene Materialien ermöglicht sein, ohne dass das Sägeblatt gewechselt werden muß.Against this background, the invention has for its object to provide a saw blade, which is used in conjunction with a rotary oscillation drive to perform cuts in hard to reach places. In this case, the widest possible scope is to be created and in particular an insert for different materials to be possible without the saw blade must be changed.

Ferner soll eine Säge mit einem derartigen Sägeblatt angegeben werden.Furthermore, a saw should be specified with such a saw blade.

Diese Aufgabe wird bei einem Sägeblatt gemäß der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass der Arbeitsabschnitt an zumindest eine Oberfläche, vorzugsweise an beiden Oberflächen eine Beschichtung mit einem Schleifmaterial, vorzugsweise eine Beschichtung mit Diamant-Schleifpartikeln oder Hartmetall-Schleifpartikeln aufweist.This object is achieved in a saw blade according to the aforementioned type according to the invention in that the working portion on at least one surface, preferably on both surfaces has a coating with an abrasive material, preferably a coating with diamond abrasive particles or carbide abrasive particles.

Die Aufgabe der Erfindung wird auf diese Weise vollkommen gelöst.The object of the invention is completely solved in this way.

Durch die erfindungsgemäße Beschichtung zumindest einer Oberfläche mit einem Schleifmaterial lassen sich verschiedenartige Materialien auf besonders präzise Weise schneiden, wobei sich besonders glatte und saubere Schnitte ergeben.By coating at least one surface with an abrasive material according to the invention, various materials can be cut in a particularly precise manner, resulting in particularly smooth and clean cuts.

Die Beschichtung grenzt hierbei vorzugsweise an die Schneide an.The coating preferably adjoins the cutting edge.

Diese Maßnahme hat den Vorteil, dass ein Sägeschnitt derart ausgeführt werden kann, dass das geschnittene Material keinerlei Nachbearbeitung durch Schleifen oder dergleichen erfordert.This measure has the advantage that a saw cut can be made such that the cut material does not require any post-processing by grinding or the like.

Die Aufgabe wird ferner durch eine Säge gemäß Anspruch 8 gelöst.The object is further achieved by a saw according to claim 8.

Die Schneide weist in vorteilhafter Weiterbildung der Erfindung eine Schränkung, vorzugsweise eine Wellenschränkung auf.The cutting edge, in an advantageous development of the invention, has a setting, preferably a wave restriction.

Mit einer derartigen Ausführung lassen sich vorteilhaft Bleche bearbeiten.With such an embodiment can be processed plates advantageously.

Bei einer weiteren Ausführung der Erfindung weist das Sägeblatt eine längliche Bauform auf, wobei sich der Befestigungsabschnitt von einem Ende zum Arbeitsabschnitt an einem gegenüberliegenden Ende erstreckt.In a further embodiment of the invention, the saw blade has an elongated shape, wherein the attachment portion extending from one end to the working section at an opposite end.

Mit einer derartigen länglichen Bauform können Schnitte unter räumlich eng begrenzten Verhältnissen durchgeführt werden. Insbesondere können leicht Ausschnitte an Holzplatten oder Holzprofilen, an Gegenständen aus Kunststoff, Gipskartonplatten und dergleichen mehr gefertigt werden, was insbesondere in der Bautechnik von Vorteil ist.With such an elongated design cuts can be made under spatially limited conditions. In particular, cutouts on wood panels or wood profiles, on articles made of plastic, plasterboard and the like can be made more easily, which is particularly advantageous in construction technology.

Der Arbeitsabschnitt des Sägeblattes kann eine gekrümmte Schneide aufweisen, wobei der Krümmungsmittelpunkt vorteilhafterweise im Zentrum der Befestigungsöffnung liegen kann. Auf diese Weise kann ein besonders vibrationsarmer Schnitt durchgeführt werden.The working section of the saw blade may have a curved cutting edge, wherein the center of curvature may advantageously lie in the center of the fastening opening. In this way, a particularly low-vibration cut can be performed.

Hierzu kann das Sägeblatt auch eine kreisförmige oder teilkreisförmige Schneide aufweisen. Damit können auf relativ einfache Weise längere und tiefere Schnitte erzeugt werden.For this purpose, the saw blade may also have a circular or part-circular cutting edge. In this way, longer and deeper cuts can be generated in a relatively simple manner.

In alternativer Ausführung weist der Arbeitsabschnitt eine zumindest abschnittsweise gerade Schneide auf, die ggf. auch mehrere zueinander abgewinkelte Abschnitte aufweisen kann.In an alternative embodiment, the working section has an at least sectionally straight cutting edge, which if necessary can also have a plurality of mutually angled sections.

Hiermit lassen sich besonders günstig Einschnitte an ebenen Oberflächen erzeugen.This can be particularly favorable incisions on flat surfaces.

Gemäß einer weiteren Ausführung der Erfindung ist die Befestigungsöffnung des Sägeblattes zur formschlüssigen Verbindung mit der Antriebswelle ausgebildet.According to a further embodiment of the invention, the attachment opening of the saw blade is designed for positive connection with the drive shaft.

Auf diese Weise wird eine sichere Befestigung und Kraftübertragung auch bei höheren Drehmomenten gewährleistet.In this way, a secure attachment and power transmission is guaranteed even at higher torques.

Gemäß einer weiteren Ausführung der Erfindung weist das Sägeblatt eine abgekröpfte Bauform auf.According to a further embodiment of the invention, the saw blade on a cranked design.

Hiermit ist es möglich, mit der Schneide unmittelbar bündig entlang einer Oberfläche zu arbeiten.This makes it possible to work with the cutting edge directly flush along a surface.

Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale der Erfindung nicht nur in der jeweils angegebenen Kombination sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der Erfindung zu verlassen.It is understood that the features of the invention mentioned above and those yet to be explained below can be used not only in the particular combination indicated but also in other combinations or alone, without departing from the scope of the invention.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele unter Bezugnahme auf die Zeichnung. Es zeigen:

Figur 1
eine Ansicht einer ersten Ausführung eines erfindungsgemäßen Sägeblattes;
Figur 2
eine Seitenansicht einer erfindungsgemäßen Säge im Bereich des vorderen Endes des Drehoszillationsantriebes mit einem auf dessen Antriebswelle aufgesetzten Sägeblatt in gekröpfter Ausführung;
Figur 3
eine Aufsicht des Sägeblattes gemäß Figur 2;
Figur 4
eine Aufsicht eines weiteren nicht zur Erfindung gehörenden Sägeblattes, das als kreisförmiges, gekröpftes Sägeblatt ausgeführt ist;
Figur 5
eine Aufsicht einer weiteren Ausführungsform eines erfindungsgemäßen Sägeblatts;
Figur 6
eine Aufsicht einer weiteren Ausführungsform eines erfindungsgemäßen Sägeblatts und
Figur 7
eine perspektivische Teilansicht einer Schneide mit einer Wellensehränkung von vorn.
Further features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings. Show it:
FIG. 1
a view of a first embodiment of a saw blade according to the invention;
FIG. 2
a side view of a saw according to the invention in the region of the front end of the rotary oscillation drive with a mounted on the drive shaft saw blade in a cranked design;
FIG. 3
a top view of the saw blade according to FIG. 2 ;
FIG. 4
a plan view of another not belonging to the invention saw blade, which is designed as a circular, cranked saw blade;
FIG. 5
a plan view of another embodiment of a saw blade according to the invention;
FIG. 6
a plan view of another embodiment of a saw blade according to the invention and
FIG. 7
a partial perspective view of a cutting edge with a Wellensehränkung from the front.

Die Figuren 1 und 3 zeigen Sägeblätter, wie sie in der Grundform aus der EP-A-0 881 023 bereits bekannt sind. Figur 4 zeigt dagegen ein kreisförmiges, gekröpftes Sägeblatt, das ebenfalls im Stand der Technik bereits grundsätzlich bekannt ist. Die Sägeblätter gemäß der Figuren 1 und 3 weisen erfindungsgemäß zusätzliche Beschichtungen 19 bzw. 19a mit Diamant- oder Hartmetall-Schleifpartikeln auf.The FIGS. 1 and 3 show saw blades, as in the basic form of the EP-A-0 881 023 already known. FIG. 4 on the other hand shows a circular, cranked saw blade, which is also already known in principle in the prior art. The saw blades according to the FIGS. 1 and 3 according to the invention have additional coatings 19 and 19a with diamond or carbide abrasive particles.

Die hier beschriebenen Sägeblätter sind sämtlich speziell zur Befestigung auf dem freien Ende einer Antriebswelle eines Oszillationsantriebes ausgebildet.The saw blades described herein are all specifically designed for attachment to the free end of a drive shaft of an oscillating drive.

Figur 2 zeigt eine derartige Säge 40, die einen Oszillationsantrieb 42 aufweist. Der Oszillationsantrieb treibt eine Antriebswelle 44 mit hoher Frequenz von z.B. 5.000 bis 25.000 Schwingungen pro Minute und kleinem Schwenkwinkel von z. B. 0,5° bis 7° um die Längsachse 46 der Antriebswelle hin- und herschwingend an, wie durch den Doppelpfeil 49 angedeutet ist. FIG. 2 shows such a saw 40, which has an oscillating drive 42. The oscillation drive drives a drive shaft 44 with a high frequency of, for example, 5,000 to 25,000 oscillations per minute and a small pivot angle of z. B. 0.5 ° to 7 ° about the longitudinal axis 46 of the drive shaft back and forth swinging, as indicated by the double arrow 49.

Auf dem freien Ende der Antriebswelle 44 ist eine Aufnahme für das Sägeblatt vorgesehen, auf das dieses aufgesteckt werden kann und mittels eines Befestigungselementes 48, z. B. einer Schraube, befestigt werden kann.On the free end of the drive shaft 44, a receptacle for the saw blade is provided, to which this can be plugged and by means of a fastening element 48, for. B. a screw can be attached.

Im Unterschied zu den im Stand der Technik bekannten Sägeblättern bestehen nunmehr die erfindungsgemäßen Sägeblätter zumindest im Bereich ihrer Schneiden aus Bimetall.In contrast to the saw blades known in the prior art, the saw blades according to the invention now consist of bimetal, at least in the region of their cutting edges.

Bei der Ausführung gemäß Figur 1 weist das insgesamt mit der Ziffer 10 bezeichnete Sägeblatt eine ebene, längliche Bauform und weist an einem Ende einen Befestigungsabschnitt 12 auf, in dem eine sternförmige Befestigungsöffnung 14 zur formschlüssigen Verbindung mit der Antriebswelle 44 des Oszillationsantriebes 42 vorgesehen ist. Der Befestigungsabschnitt 12 erstreckt sich bis zu einem Arbeitsabschnitt 16 am gegenüberliegenden Ende. Am Arbeitsabschnitt 16 ist am äußeren Rand eine mit Sägezähnen versehene Schneide 18 ausgebildet, die bei der dargestellten Ausführung gerade verläuft. Obwohl hier nicht dargestellt, kann die Schneide 18 selbstverständlich auch gekrümmt oder mehrfach abgewinkelt ausgeführt sein.In the execution according to FIG. 1 the saw blade generally designated by the numeral 10 has a planar, elongated design and has at one end a mounting portion 12 in which a star-shaped mounting opening 14 is provided for positive connection with the drive shaft 44 of the oscillating drive 42. The attachment portion 12 extends to a working portion 16 at the opposite end. At the working portion 16 is provided with saw teeth cutting edge 18 is formed on the outer edge, which runs straight in the illustrated embodiment. Although not shown here, the cutting edge 18 can of course also be curved or multiply angled.

Bei der Ausführung gemäß Figur 1 ist das gesamte Sägeblatt 10 aus einem Bimetall-Rohling hergestellt. Es kann z. B. aus dem Bimetall-Rohling z. B. durch Ausstanzen (ggf. einschließlich der Sägezähne) geformt sein. Nach einer geeigneten Wärmebehandlung zur Härtung bzw. Vergütung des Sägeblattes 10 können die Sägezähne der Schneide 18 ggf. durch Schleifen nachgeschärft werden.In the execution according to FIG. 1 the entire saw blade 10 is made of a bimetal blank. It can, for. B. from the bimetallic blank z. B. by punching (possibly including the saw teeth) may be formed. After a suitable heat treatment for hardening or tempering the saw blade 10, the saw teeth of the cutting edge 18 can be resharpened if necessary by grinding.

Zusätzlich ist - wie bereits erwähnt - das Sägeblatt 10 gemäß Figur 1 in seinem an die Schneide 18 unmittelbar angrenzenden Bereich an beiden Seiten mit einer tung 19 versehen, die vorzugsweise Diamant-Schleifpartikel enthält. Es könnte sich beispielsweise um eine Beschichtung des Typs D126 handeln. In alternativer Ausführung könnte die Beschichtung beispielsweise feinkörnige Hartmetall-Schleitfpartikel enthalten.In addition - as already mentioned - the saw blade 10 according to FIG. 1 provided in its immediately adjacent to the cutting edge 18 region on both sides with a device 19, which preferably contains diamond abrasive particles. For example, it could be a D126 coating. In an alternative embodiment, the coating could include, for example, fine-grained carbide Schleitfpartikel.

Dies ermöglicht es, dass beim Schneiden eines Materials mit der Schneide 18 gleichzeitig die Oberfläche des Schnittes mittels der Diamant-Schleifpartikel geschliffen wird. So lässt sich in einem einzigen Arbeitsgang ein sauberer Schnitt erzeugen, keinerlei Nachbearbeitung erfordert.This makes it possible that when cutting a material with the cutting edge 18 at the same time the surface of the cut is ground by means of the diamond abrasive particles. This makes it possible to create a clean cut in a single operation, requiring no post-processing.

In Figur 2 und 3 ist eine abgewandelte Bauform eines erfindungsgemäßen Sägeblattes mit der Ziffer 20 bezeichnet. Hierbei werden für entsprechende Teile entsprechende Bezugsziffern verwendet, die ggf. von a nachgefolgt sind. Das Sägeblatt 20 gemäß der Figuren 2 und 3 weist einen Befestigungsabschnitt 12a mit einer runden Befestigun gsöffnung 14a auf und erweitert sich vom Befestigungsabschnitt 12a aus in einem Winkel von etwa 30° zum Arbeitsabschnitt 16a am gegenüberliegenden Ende. An äußeren Ende des Arbeitsabschnittes 16a ist wiederum eine gerade Schneide 18a vorgesehen. Zusätzlich ist am Übergang zwischen dem Befestigungsabschnitt 12a und dem Arbeitsabschnitt 16a eine Kröpfung 22a vorgesehen. Der Bereich zwischen der Schneide 18a und der Kröpfung 22a ist wiederum beidseitig mit einer Beschichtung aus Diamant D126 versehen.In FIGS. 2 and 3 is a modified design of a saw blade according to the invention designated by the numeral 20. Here, corresponding reference numerals are used for corresponding parts, which may have followed by a. The saw blade 20 according to the FIGS. 2 and 3 has a mounting portion 12a with a round fastening opening 14a and widens from the mounting portion 12a at an angle of about 30 ° to the working portion 16a at the opposite end. At the outer end of the working portion 16a, in turn, a straight cutting edge 18a is provided. In addition, at the transition between the attachment portion 12a and the working portion 16a, a crank 22a is provided. The area between the cutting edge 18a and the crank 22a is in turn provided on both sides with a coating of diamond D126.

Figur 4 zeigt eine abgewandelte Bauform eines Sägeblattes 30, das kreisförmig ausgebildet ist und in der FIG. 4 shows a modified design of a saw blade 30 which is circular and in the

Mitte einen Befestigungsabschnitt 12b mit einer kreisförmigen Befestigungsöffnung 14b trägt. Am Übergang zwischen dem Befestigungsabschnitt 12b und dem Arbeitsabschnitt 16b ist eine Kröpfung 22b vorgesehen. Die Schneide 18b ist als kreisförmige Schneide mit Sägezähnen am Außenrand des Arbeitsabschnittes 16b ausgebildet.Center carries a mounting portion 12b with a circular mounting hole 14b. At the transition between the mounting portion 12b and the working portion 16b, a crank 22b is provided. The cutting edge 18b is formed as a circular cutting edge with saw teeth on the outer edge of the working portion 16b.

Zwecks einer einfachen und kostengünstigen Herstellung besteht bei dieser Ausführung lediglich der Arbeitsabschnitt 16b aus Bimetall, während der Befestigungsabschnitt 12b einschließlich der Kröpfung 22b aus einem normalen Stahlblech, z. B. aus Werkzeugstahl, hergestellt ist, ohne dass eine erfindungsgemäße Beschichtung einem Schleifmaterial aufgebracht ist. Der Arbeitsabschnitt 16b aus Bimetall kann beispielsweise mit dem Befestigungsabschnitt 12b im Bereich der Kröpfung 22b durch Laserschweißen verbunden sein.For the purpose of a simple and cost-effective production in this embodiment, only the working portion 16b of bimetal, while the mounting portion 12b including the crank 22b of a normal steel sheet, for. B. tool steel, is made without a coating according to the invention is applied to an abrasive material. The working section 16b made of bimetal can be connected, for example, to the fastening section 12b in the region of the crank 22b by laser welding.

In den Figuren 5 und 6 sind zwei weitere Ausführungsformen der Erfindung insgesamt mit den Ziffern 40 bzw. 50 bezeichnet.In the FIGS. 5 and 6 two further embodiments of the invention are generally designated by the numbers 40 and 50, respectively.

Das Sägeblatt 40 gemäß Fig. 5 weist an seinem Befestigungsabschnitt 12c zwei zueinander parallele Langlöcher 14c und 15c auf, die nach außen hin ausmünden. Dies erleichtert die Befestigung an einem entsprechend geformten Halter, wie etwa aus der EP-A-1 208 950 bekannt. Vom Befestigungsabschnitt 12c aus verjüngt sich das Sägeblatt 40 beidseitig zu einem schmaleren Arbeitsabschnitt 16c hin. Am äußeren Ende des Arbeitsabschnittes 16c ist eine Schneide 18c aus Bimetall aufgelötet oder aufgeschweißt. Wiederum ist der Arbeitsabschnitt 16c in seinem unmittelbar an die Schneide 18c angrenzenden Bereich beidseitig mit einer Beschichtung 19c des Typs Diamant D 126 versehen.The saw blade 40 according to Fig. 5 has at its attachment portion 12c two mutually parallel slots 14c and 15c, which open outward. This facilitates attachment to a correspondingly shaped holder, such as from EP-A-1 208 950 known. From the attachment portion 12c, the saw blade 40 tapers on both sides to a narrower working portion 16c. At the outer end of the working portion 16c, a cutting edge 18c made of bimetal is soldered or welded. In turn, the working section 16c is provided on both sides in its region immediately adjacent to the cutting edge 18c with a coating 19c of the diamond D 126 type.

Das Sägeblatt 50 entspricht weitgehend dem in Figur 5 gezeigten Sägeblatt 40. Der einzige Unterschied besteht darin, dass das Sägeblatt 50 infolge einer breiteren Schneide 18d eine einheitliche Breite vom Befestigungsabschnitt 12d bis zum Arbeitsabschnitt 16d hin aufweist.The saw blade 50 largely corresponds to the in FIG. 5 The only difference is that the saw blade 50 has a uniform width from the mounting portion 12d to the working portion 16d due to a wider cutting edge 18d.

In Figur 7 ist eine Schneide 18e von vorn vergrößert dargestellt. Die Schneide weist eine Schränkung in Form einer sog. Wellenschränkung auf. Hierbei "fließen" die Zähne 17e um die Mittellinie der Schneide abwechselnd zur einen und zur anderen Seite hin herum. Eine derartige Schränkung ist besonders geeignet, um auch dünnwandige Bleche und Profile zu sägen. Vorzugsweise sind alle Schneiden 18, 18a, 18b, 18c, 18d mit einer derartigen Schränkung versehen. So wird die Anzahl der möglichen zu sägenden Materialien erheblich vergrößert.In FIG. 7 a cutting edge 18e is shown enlarged from the front. The cutting edge has a setting in the form of a so-called wave restriction. Here, the teeth 17e "flow" around the center line of the blade alternately to one side and the other side. Such a setting is particularly suitable for sawing even thin-walled sheets and profiles. Preferably, all cutters 18, 18a, 18b, 18c, 18d are provided with such a set. This significantly increases the number of possible materials to be sawn.

Claims (8)

  1. A saw blade for a saw (40) having a rotary oscillatory drive comprising a mounting section (12; 12a; 12c; 12d) having a mounting opening (14; 14a; 14b; 14c, 15c; 14d, 15d) mated to a support of the drive shaft (44) for postively or non-positively engaging the drive shaft (44) which is driven rotaringly oscillating about its longitudinal axis, and further comprising a working section (16; 16a; 16b; 16c; 16d) having a cutting edge (18; 18a; 18b; 18c; 18d; 18e) with a series of cutting teeth (17e), wherein at least the cutting edge (18; 18a; 18b; 18c; 7.8d; 18e) is made of bimetal, characterized in that the working section (16; 16a; 16b; 16c; 16d) at least at one surface, preferably at both surfaces, comprises a coating (19; 19a; 19c; 19d) with a grinding material, pre-erably a coating with diamond grinding particles or hard metal grinding particles.
  2. The saw blade of claim 1, characterized in that the cutting edge (18; 18a; 18b); 18c; 18d; 18e) comprises a set of teeth.
  3. The saw blade of claim 2, characterized in that the cutting edge (18; 18a; 181); 18c; 18d; 18e) comprises a wave set of teeth.
  4. The saw blade of any of the preceding claims, characterized in that the coating (19; 19a; 19c; 19d) is located at a section adjoining the cutting edge (18; 18a; 18b; 18c; 18d; 18e).
  5. The saw of any of the preceding claims, characterized in that the blade (17; 20; 40; 50) is designed longitudinally, wherein the mounting section (12; 12a; 12b; 12c; 12d) extends from one end to the working section (16; 16a; 16b 16c; 16d) at an opposite end thereof.
  6. The saw blade of any of the preceding claims, wherein the working section (16b) of the saw blade (30) comprises a bent cutting edge (18b), wherein the center of the bending is preferably located within the mounting opening (14b).
  7. The saw blade of claim 6, wherein the saw blade (30) comprises an arcuate or a partially arcuate cutting edge (18b).
  8. A saw (40) comprising an oscillatory drive (42) for rotatingly oscillating driving a drive shaft (44) about its longitudinal axis (46), and further comprising a saw blade (10; 20; 30; 40; 50) according to any of claims 1 to 7.
EP20040010149 2003-05-28 2004-04-29 Saw with oscillating rotative driving motion and saw blade therefor Expired - Lifetime EP1481750B9 (en)

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DE20308797U 2003-05-28
DE2003208797 DE20308797U1 (en) 2003-05-28 2003-05-28 Saw with a rotating oscillating drive movement and saw blade therefor

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DE502004007196D1 (en) 2008-07-03
EP1481750B1 (en) 2008-05-21
DE20308797U1 (en) 2003-08-28
US20050178261A1 (en) 2005-08-18
EP1481750A1 (en) 2004-12-01

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