EP0009512A1 - Saw blade for cutting wood and similar materials - Google Patents

Saw blade for cutting wood and similar materials Download PDF

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Publication number
EP0009512A1
EP0009512A1 EP78101122A EP78101122A EP0009512A1 EP 0009512 A1 EP0009512 A1 EP 0009512A1 EP 78101122 A EP78101122 A EP 78101122A EP 78101122 A EP78101122 A EP 78101122A EP 0009512 A1 EP0009512 A1 EP 0009512A1
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EP
European Patent Office
Prior art keywords
saw blade
saw
gap
blade according
tooth
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
EP78101122A
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German (de)
French (fr)
Other versions
EP0009512B1 (en
Inventor
Gerd Höptner
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Individual
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Individual
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Publication date
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Publication of EP0009512A1 publication Critical patent/EP0009512A1/en
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    • 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
    • B27B33/02—Structural design of saw blades or saw teeth

Definitions

  • the invention relates to a saw blade for cutting wood and similar materials with trapezoidal saw teeth, the cutting edges of which are arranged in the longitudinal direction of the saw blade on the narrow outer trapezoidal side and each saw tooth is interrupted by a gap.
  • Such saw blades having knife-like cutting teeth are known from DE-GM 76 16 080. They can be used to make very smooth cuts, but they still require considerable effort, as they tend to get stuck in the wood or similar material to be cut.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem of creating a saw blade for wood saws, with which a smooth cut can be achieved with good smoothness of the saw.
  • the saw blade 1 and 2 show a saw blade 1, which has pin holes 2 at both ends for clamping in the bracket of a hacksaw.
  • the saw blade 1 is provided with trapezoidal saw teeth 3 which have cutting edges 4 only on their narrow, trapezoidal outer side.
  • the cutting edge 4 is interrupted by a gap 5, the opening width of which is approximately equal to one third of the narrow sawtooth trapezoidal side (cutting edge 4).
  • the gaps are delimited by two parallel side walls 6, 7, which merge into an arcuate gap bottom 8 at the bottom.
  • the depth of the gaps 5 is approximately equal to half the tooth height h.
  • the angle ⁇ between the tooth flanks 9 and the cutting edge 4 is 110 ° in the exemplary embodiment shown, which brings optimal results for most applications.
  • the flanks can be chosen steeper up to an angle ⁇ slightly larger than 90 °. In the case of soft material to be cut, it is advisable to incline the tooth flanks more gently, but an angle ⁇ of 150 ° should not be exceeded.
  • the teeth 3 are mutually crossed on both sides, as can be seen from FIG. 4.
  • the teeth are each provided with a sharpening edge 10 on their inner side.
  • Fig. 3 shows a modified embodiment in which the saw teeth 3 are provided with a gap 11 widening downwards.
  • the side walls 12, 13 of the gap 11 diverge downward and, moreover, run in a folding symmetry with respect to the center plane M of the tooth gap 11
  • the saw toothing according to the invention is not only suitable for the saw blades of hacksaws, but also for circular saws, band saws and other saws for working with wood or similar materials.
  • the saw teeth are hardened electro-inductively to increase their stability.

Abstract

1. Saw blade for cutting wood and similar materials, with saw teeth (3) of trapezium form, the cutting edges (4) of which are arranged in the longitudinal direction of the saw blade (1) on the short external side of the trapezium and are interrupted, for each saw tooth, by a gap (5 ; 11), characterized in that each gap (5 ; 11) is limited by two parallel or two downwardly divergent side walls (6, 7 ; 12, 13), in that the width of opening of each gap (5, 11) is approximately equal to one third of the short trapezium side of the saw tooth, in that the depth of the gaps (5 ; 11) is approximately equal to half the tooth height (h), and in that the bottom of the gap (8) is rounded in arcuate form.

Description

Die Erfindung bezieht sich auf ein Sägeblatt zum Trennen von Holz und ähnlichen Werkstoffen mit trapezförmigen Sägezähnen, deren Schneidkanten in Längsrichtung des Sägeblattes auf der schmalen außenliegenden Trapezseite angeordnet und je Sägezahn durch eine Lücke unterbrochen sind.The invention relates to a saw blade for cutting wood and similar materials with trapezoidal saw teeth, the cutting edges of which are arranged in the longitudinal direction of the saw blade on the narrow outer trapezoidal side and each saw tooth is interrupted by a gap.

Derartige, messerartige Schneidzähne aufweisende Sägeblätter sind durch das DE-GM 76 16 080 bekannt. Mit ihnen lassen sich sehr glatte Schnitte erreichen, jedoch benötigen sie noch einen beachtlichen Kraftaufwand, da sie die Tendenz haben, sich wie ein Messer im Holz oder in ähnlichem Schneidgut festzuklemmen.Such saw blades having knife-like cutting teeth are known from DE-GM 76 16 080. They can be used to make very smooth cuts, but they still require considerable effort, as they tend to get stuck in the wood or similar material to be cut.

Hier will die Erfindung Abhilfe schaffen. Die Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, löst die Aufgabe, ein Sägeblatt für Holzsägen zu schaffen, mit welchem bei guter Leichtgängigkeit der Säge ein glatter Schnitt erreicht werden kann.The invention seeks to remedy this. The invention, as characterized in the claims, solves the problem of creating a saw blade for wood saws, with which a smooth cut can be achieved with good smoothness of the saw.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, daß durch die spezielle Form der je Schneidkante unterbrechenden Lücke ein hoher Raspeleffekt erzeugt wird, durch den die Schnittfuge ausgeräumt wird. Die sich vorzugsweise nach unten hin erweiternde Lücke beläßt jedoch noch lange Schneidkanten, so daß ein glatter Schnitt trotz dieses Raspeleffektes gewährleistet bleibt.The advantages achieved by the invention are essentially to be seen in the fact that the special shape of the gap interrupting each cutting edge produces a high rasp effect, by means of which the kerf is cleared. However, the gap, which preferably widens downward, still leaves long cutting edges, so that a smooth cut is ensured despite this rasp effect.

Im folgenden wird die Erfindung anhand in der Zeichnung dargestellter Ausführungsbeispiele näher erläutert. Es zeigt :

  • Fig. 1 in Seitenansicht ein erfindungsgemäßes Sägeblatt,
  • Fig. 2 in vergrößter Darstellung einen Sägezahn des Sägeblattes nach Fig. 1,
  • Fig. 3 eine abgewandelte Ausführungsform eines Sägezahnes und
  • Fig. 4 die Schränkung und Schärfung der Sägezähne.
The invention is explained in more detail below with reference to exemplary embodiments shown in the drawing. It shows :
  • 1 is a side view of an inventive saw blade,
  • 2 is an enlarged view of a saw tooth of the saw blade of FIG. 1,
  • Fig. 3 shows a modified embodiment of a saw tooth and
  • Fig. 4, the setting and sharpening of the saw teeth.

Die Fig. 1 und 2 zeigen ein Sägeblatt 1, welches an beiden Enden Zapfenlöcher 2 zum Einspannen in den Bügel einer Bügelsäge besitzt. Das Sägeblatt 1 ist mit trapezförmigen Sägezähnen 3 versehen, die ausschließlich an ihrer schmalen, außenliegenden Trapezseite Schneidkanten 4 aufweisen. Bei jedem Sägezahn ist die Schneidkante 4 durch eine Lücke 5 unterbrochen, deren Öffnungsweite etwa gleich einem Drittel der schmalen Sägezahn-Trapezseite (Schneidkante 4) beträgt. Die Lücken sind von zwei parallelen Seitenwänden 6, 7 begrenzt, die unten in einem kreisbogenförmigen Lückenboden 8 übergehen. Die Tiefe der Lücken 5 ist etwa gleich der halben Zahnhöhe h. Der Winkel α zwischen den Zahnflanken 9 und der Schneidkante 4 beträgt beim dargestellten Ausführungsbeispiel 110°, was für die meisten Anwendungsfälle optimale Ergebnisse bringt. Bei hartem, zu bearbeitendem Material können die Flanken steiler gewählt werden bis zu einem Winkel α etwas größer nur als 90°. Bei weichem Schneidgut empfiehlt es sich, die Zahnflanken flacher zu neigen, wobei aber ein Winkel α von 150° nicht überschritten werden soll.1 and 2 show a saw blade 1, which has pin holes 2 at both ends for clamping in the bracket of a hacksaw. The saw blade 1 is provided with trapezoidal saw teeth 3 which have cutting edges 4 only on their narrow, trapezoidal outer side. In each sawtooth, the cutting edge 4 is interrupted by a gap 5, the opening width of which is approximately equal to one third of the narrow sawtooth trapezoidal side (cutting edge 4). The gaps are delimited by two parallel side walls 6, 7, which merge into an arcuate gap bottom 8 at the bottom. The depth of the gaps 5 is approximately equal to half the tooth height h. The angle α between the tooth flanks 9 and the cutting edge 4 is 110 ° in the exemplary embodiment shown, which brings optimal results for most applications. In the case of hard material to be machined, the flanks can be chosen steeper up to an angle α slightly larger than 90 °. In the case of soft material to be cut, it is advisable to incline the tooth flanks more gently, but an angle α of 150 ° should not be exceeded.

Die Zähne 3 sind wechselseitig nach beiden Seiten verschränkt, wie aus Fig. 4 ersichtlich ist. Die Zähne sind jeweils an ihrer innenliegenden Seite mit einer Schärfungswate 10 versehen.The teeth 3 are mutually crossed on both sides, as can be seen from FIG. 4. The teeth are each provided with a sharpening edge 10 on their inner side.

Fig. 3 zeigt eine abgewandelte Ausführungsform, bei welcher die Sägezähne 3 mit einer nach unten hin sich erweiternden Lücke 11 versehen sind. Die Seitenwände 12, 13 der Lücke 11 divergieren nach unten hin und verlaufen im übrigen klappsymmetrisch zur Mittelebene M der Zahnlücke 11.Fig. 3 shows a modified embodiment in which the saw teeth 3 are provided with a gap 11 widening downwards. The side walls 12, 13 of the gap 11 diverge downward and, moreover, run in a folding symmetry with respect to the center plane M of the tooth gap 11

Die erfindungsgemäße Sägeverzahnung ist nicht nur für die Sägeblätter von Bügelsägen, sondern auch für Kreissägen, Bandsägen und sonstige Sägen zur Bearbeitung von Holz oder ähnlichen Werkstoffen geeignet.The saw toothing according to the invention is not only suitable for the saw blades of hacksaws, but also for circular saws, band saws and other saws for working with wood or similar materials.

Zur Erhöhung der Standfestigkeit sind die Sägezähne elektroinduktiv gehärtet.The saw teeth are hardened electro-inductively to increase their stability.

Claims (7)

1. Sägeblatt zum Trennen von Holz und ähnlichen Werkstoffen mit trapezförmigen Sägezähnen (3), deren Schneidkanten (4) in Längsrichtung des Sägeblattes (1) auf der schmalen, außenliegenden Trapezseite angeordnet und je Sägezahn durch eine Lücke (5; 11) unterbrochen sind, dadurch gekennzeichnet, daß jede Lücke (5; 11) von zwei parallelen oder zwei nach unten hin divergierenden Seitenwänden (6, 7; 12, 13) begrenzt ist.1. saw blade for cutting wood and similar materials with trapezoidal saw teeth (3), the cutting edges (4) of which are arranged in the longitudinal direction of the saw blade (1) on the narrow, trapezoidal side and each saw tooth is interrupted by a gap (5; 11), characterized in that each gap (5; 11) is delimited by two parallel or two downwardly diverging side walls (6, 7; 12, 13). 2. Sägeblatt nach Anspruch 1, dadurch gekennzeichnet, daß die Öffnungsweite jeder Lücke (5, 11) etwa gleich ein Drittel der schmalen Sägezahn-Trapezseite beträgt.2. Saw blade according to claim 1, characterized in that the opening width of each gap (5, 11) is approximately equal to one third of the narrow sawtooth trapezoidal side. 3. Sägeblatt nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Tiefe der Lücken (5; 11) etwa gleich der halben Zahnhöhe (h) ist.3. Saw blade according to claims 1 and 2, characterized in that the depth of the gaps (5; 11) is approximately equal to half the tooth height (h). 4. Sägeblatt nach den Ansprüchen 1 bis 3, dadurch geknnzeichnet, daß der Lückenboden (8) kreisbogenförmig abgerundet ist.4. Saw blade according to claims 1 to 3, characterized in that the gap base (8) is rounded in a circular arc. 5. Sägeblatt nach Anspruch 1, dadurch gekennzeichnet, daß die geschränkten Sägezähne (3) jeweils an ihrer innenliegende Seite mit einer Schärfungswate (10) versehen sihd.5. Saw blade according to claim 1, characterized in that the set saw teeth (3) are provided on their inner side with a sharpening edge (10). 6. Sägeblatt nach Anspruch 1, dadurch gekennzeichnet, daß der Winkel (α) zwischen den Zahnflanken (9) und der Schneidkante (4) zwischen 90° und 150° liegt.6. Saw blade according to claim 1, characterized in that the angle (α) between the tooth flanks (9) and the cutting edge (4) is between 90 ° and 150 °. 7. Sägeblatt nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Zähne (3) elektroinduktiv gehärtet sind.7. Saw blade according to one of claims 1 to 6, characterized in that the teeth (3) are hardened electro-inductively.
EP78101122A 1978-09-29 1978-10-11 Saw blade for cutting wood and similar materials Expired EP0009512B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2842514 1978-09-29
DE2842514A DE2842514C2 (en) 1978-09-29 1978-09-29 Saw blade for cutting wood and other materials

Publications (2)

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EP0009512A1 true EP0009512A1 (en) 1980-04-16
EP0009512B1 EP0009512B1 (en) 1982-06-16

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Family Applications (1)

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EP78101122A Expired EP0009512B1 (en) 1978-09-29 1978-10-11 Saw blade for cutting wood and similar materials

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EP (1) EP0009512B1 (en)
DE (1) DE2842514C2 (en)
IT (1) IT1207243B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29600567U1 (en) * 1996-01-15 1996-09-26 Wilhelm Putsch Ohg Saw blade for an oscillating machine saw
US7225714B2 (en) 2004-12-22 2007-06-05 Black & Decker Inc. Tooth form design for reciprocating saw blade
US7658136B2 (en) 2004-12-22 2010-02-09 Black & Decker Inc. Hole saw blade
RU2580260C2 (en) * 2011-05-06 2016-04-10 Викус-Зегенфабрик Вильхельм Х.Кулльманн Гмбх Унд Ко.Кг Saw blade for cutting of hollow moulded sections

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015008046U1 (en) 2015-11-20 2016-01-27 Robert Bosch Gmbh sawblade

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE47792C (en) * L. JIRKU in Wien IX, Severingasse 6 Bandsaw with several saw bands
DE7616080U1 (en) * Grzesiek, Leopold, 3401 Landolfshausen
DE675437C (en) * 1937-08-04 1939-05-08 Gerhard Euler Saw blade with sharpened M-teeth
DE823514C (en) * 1949-02-04 1951-12-03 Bernhard Grassmann Saw with alternating sequence of pairs of precuts and clearers
FR1049435A (en) * 1951-07-19 1953-12-29 Partiot Cementation Atel Process for treating wood saw blades, in particular band saw blades, and saws obtained by this process
GB766929A (en) * 1954-09-30 1957-01-30 Hille Engineering Company Ltd Improvements in circular saws
DE2312951A1 (en) * 1972-03-15 1973-09-27 Uddeholms Ab SAW BLADE
DE2722490A1 (en) * 1977-05-18 1978-11-23 Hoeptner Gerd Blade for sawing green wood - has trapezoidal teeth with lengthways cutting edges only on narrow side

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE47792C (en) * L. JIRKU in Wien IX, Severingasse 6 Bandsaw with several saw bands
DE7616080U1 (en) * Grzesiek, Leopold, 3401 Landolfshausen
DE675437C (en) * 1937-08-04 1939-05-08 Gerhard Euler Saw blade with sharpened M-teeth
DE823514C (en) * 1949-02-04 1951-12-03 Bernhard Grassmann Saw with alternating sequence of pairs of precuts and clearers
FR1049435A (en) * 1951-07-19 1953-12-29 Partiot Cementation Atel Process for treating wood saw blades, in particular band saw blades, and saws obtained by this process
GB766929A (en) * 1954-09-30 1957-01-30 Hille Engineering Company Ltd Improvements in circular saws
DE2312951A1 (en) * 1972-03-15 1973-09-27 Uddeholms Ab SAW BLADE
DE2722490A1 (en) * 1977-05-18 1978-11-23 Hoeptner Gerd Blade for sawing green wood - has trapezoidal teeth with lengthways cutting edges only on narrow side

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29600567U1 (en) * 1996-01-15 1996-09-26 Wilhelm Putsch Ohg Saw blade for an oscillating machine saw
US7225714B2 (en) 2004-12-22 2007-06-05 Black & Decker Inc. Tooth form design for reciprocating saw blade
US7658136B2 (en) 2004-12-22 2010-02-09 Black & Decker Inc. Hole saw blade
RU2580260C2 (en) * 2011-05-06 2016-04-10 Викус-Зегенфабрик Вильхельм Х.Кулльманн Гмбх Унд Ко.Кг Saw blade for cutting of hollow moulded sections

Also Published As

Publication number Publication date
DE2842514B1 (en) 1979-10-04
IT7925908A0 (en) 1979-09-21
DE2842514C2 (en) 1980-06-19
IT1207243B (en) 1989-05-17
EP0009512B1 (en) 1982-06-16

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