DE102005045744A1 - Drilling tool for workpiece, has cutting part and deep hole drill with chip flutes that continuously runs from drill bit to shaft, where core diameter of drill has grading, which is pulled by force, such that depth of chip flute is enlarged - Google Patents

Drilling tool for workpiece, has cutting part and deep hole drill with chip flutes that continuously runs from drill bit to shaft, where core diameter of drill has grading, which is pulled by force, such that depth of chip flute is enlarged Download PDF

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Publication number
DE102005045744A1
DE102005045744A1 DE102005045744A DE102005045744A DE102005045744A1 DE 102005045744 A1 DE102005045744 A1 DE 102005045744A1 DE 102005045744 A DE102005045744 A DE 102005045744A DE 102005045744 A DE102005045744 A DE 102005045744A DE 102005045744 A1 DE102005045744 A1 DE 102005045744A1
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Germany
Prior art keywords
drill
chip
core diameter
deep hole
shaft
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DE102005045744A
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German (de)
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Guehring KG
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Guehring KG
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Priority to DE102005045744A priority Critical patent/DE102005045744A1/en
Publication of DE102005045744A1 publication Critical patent/DE102005045744A1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2251/00Details of tools for drilling machines
    • B23B2251/40Flutes, i.e. chip conveying grooves
    • B23B2251/402Flutes, i.e. chip conveying grooves with increasing depth in a direction towards the shank from the tool tip
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • B23B51/06Drills with lubricating or cooling equipment
    • B23B51/063Deep hole drills, e.g. ejector drills
    • B23B51/066Gun drills

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

The tool has a cylindrical shaft, a cutting part, and a deep hole drill (1) with chip flutes, where the chip flutes continuously runs from drill bit up to the shaft. The drill has a core diameter (2) with a core grading (10), where the core diameter of the drill runs cylindrically. The core grading (10) of the core diameter in the drill is pulled by force, such that depth of the chip flute is enlarged.

Description

Die Erfindung betrifft einen Tieflochbohrer gemäß dem Oberbegriff des Schutzanspruchs 1.The The invention relates to a deep hole drill according to the preamble of the protection claim 1.

Der hauptsächliche Vorteil dieser bekannten Bohrer ist darin zu sehen, das der Tieflochbohrer in spezifischen Werkstoffen ausgeführt werden kann, die den jeweiligen Anforderungen am besten gerecht werden.Of the primary Advantage of these known drill is to be seen in the deep hole drill can be carried out in specific materials that correspond to the respective Best meet the requirements.

So zeichnet sich ein Bohrer aus Vollhartmetall durch seine hohe Festigkeit und ein Bohrer aus Schnellarbeitsstahl durch seine Elastizität und höhere Zähigkeit bei hoher Verschleißfestigkeit aus. Beim Bohren mit diesen bekannten Bohrwerkzeugen treten allerdings sowohl im Werkstück als auch im Werkzeug sehr hohe thermische Beanspruchungen auf, die dazu führen können, dass der Bohrer dann, wenn er mit hohen Schnittgeschwindigkeiten betrieben wird, in der Bohrung frisst. Mit anderen Worten bedeutet dies, dass bei den bekannten Bohrwerkzeugen die positiven Eigenschaften der verwendeten Materialien nur begrenzt ausgenützt werden können.So stands out a solid carbide drill due to its high strength and a drill made of high-speed steel due to its elasticity and higher toughness with high wear resistance out. When drilling with these known drilling tools, however, occur both in the workpiece as well as in the tool very high thermal stresses, the lead to it can, that the drill then when he has high cutting speeds is operated, eats in the hole. In other words means This, that in the known drilling tools, the positive properties the materials used can be used only to a limited extent.

Der Erfindung liegt die Aufgabe zugrunde, ein Tieflochbohrer zu schaffen, der durch seinen zylindrischen abgestuften Kerndurchmesser gekennzeichnet ist, wodurch eine hohe Wärmeabfuhr von der Hauptschneide sichergestellt wird, dass die Schnittgeschwindigkeit an die mechanische Belastungsgrenze der Bohrerspitze herangeführt werden kann ohne dadurch thermische Überbeanspruchungen in Kauf nehmen zu müssen.Of the Invention has for its object to provide a deep hole drill, characterized by its cylindrical stepped core diameter is, whereby a high heat dissipation from the main cutting edge ensures that the cutting speed can be brought to the mechanical load limit of the drill bit without thermal overstress to have to accept.

Zur Vermeidung des Spänestaus wird der Kerndurchmesser (2) des Bohrers (1) von der Bohrerspitze (3) zum Schaft (4) hin abgestuft. Eine Abstufung des Kerndurchmessers zieht zwangsweise nach sich, dass sich die Tiefe des Spannut vergrößert. Während der Span im spitzennahen Bereich des Bohrers sowohl an der Spanfläche als auch an der Bohrloch – Innenwand reibt, fällt er durch die stufenförmige Ausgestaltungsform des Kerndurchmessers nach einer bestimmten Länge, gemessen vom Spitzenbereich, in eine vergrößerten Spannutentiefe, was zu einer wesentlichen Vermeidung der Reibung an der Bohrloch Innenwand führt. Durch die stufenförmige Ausgestaltungsform des Kerndurchmessers im Bohrerwerkzeug und deren vergrößerten Spannutentiefe, verringert sich der Kraftaufwand für den Weitertransport des Spans in der Spannut, dadurch wird die reibungsbedingte Wärmeentwicklung des Spans in der Spannut verringert. Durch die vergrößerte Spannutentiefe wird das Abbremsen des Spans verringert und dadurch ein Spänestau verhindert.To avoid chip jamming, the core diameter ( 2 ) of the drill ( 1 ) from the drill bit ( 3 ) to the shaft ( 4 ) graduated. A gradation of the core diameter inevitably entails that increases the depth of the flute. As the chip rubs against both the rake surface and the borehole inner wall in the tip region of the drill, it falls into an enlarged flute depth by the stepwise configuration of the core diameter after a certain length, as measured from the tip region, resulting in a substantial avoidance of friction at the borehole leads inside wall. Due to the step-shaped design of the core diameter in the drill tool and its enlarged flute depth, the force required for the further transport of the chip in the flute, thereby reducing the frictional heat development of the chip is reduced in the flute. The increased flute depth reduces the braking of the chip and prevents chips from accumulating.

Der erfindungsgemäße Bohrer ist vorzugsweise als Vollhartmetallbohrer ausgeführt.Of the drill according to the invention is preferably designed as a solid carbide drill.

Der erfindungsgemäße Tieflochbohrer ist zur Bearbeitung von Metallen, Nichtmetallen und dgl. vorgesehen.Of the Deep hole drill according to the invention is intended for processing metals, non-metals and the like.

Der Erfindung liegt die Aufgabe zugrunde, ein Bohrwerkzeug zu schaffen, das in der Lage ist, tiefe Löcher mit hoher Schnittleistung und andererseits mit sehr hoher Präzision vorzunehmen, so das auch tiefe Löcher in einem Arbeitsgang mit enger Toleranz herstellbar werden, ohne dabei die Stabilität des Bohrwerkzeugs spürbar reduzieren zu müssen.Of the Invention has for its object to provide a drilling tool that is capable of deep holes with high cutting power and on the other hand with very high precision, so that too deep holes be produced in one operation with close tolerance, without the stability of the Drill tool noticeable to have to reduce.

Die Ausbildung des Spanraums eines Bohrwerkzeugs, dessen Kerndurchmesser sich kontinuierlich von der Bohrerspitze bis zum Schaft hin verkleinert, wie dies in der Patentschrift EP 0712343 beschrieben ist, hat den Nachteil, dass sich der Spanraum nur kontinuierlich vergrößert und der Span erst nach und nach den nötigen Freiraum besitzt, um den Effekt der reibungsarmen Spanabfuhr zu erhalten.The formation of the chip space of a drilling tool whose core diameter continuously decreases from the drill tip to the shaft, as in the patent EP 0712343 has the disadvantage that the chip space increases only continuously and the chip only gradually has the necessary space to obtain the effect of low-friction chip removal.

Die konstruktive Abstufung des zylindrischen Kerndurchmessers am Bohrwerkzeug hat gezeigt, dass der Span aufgrund der plötzlichen Abstufung mit geringerem Kraftaufwand schneller abtransportiert und die Wärmeentstehung entgegen der kontinuierlichen Vergrößerung des Spanraums deutlich verringert werden kann.The constructive gradation of the cylindrical core diameter on the drilling tool has shown that the chip due to the sudden gradation with lesser Force removed faster and the heat generation against the continuous enlargement of the Spanraums can be significantly reduced.

Der Erfindung liegt die Aufgabe zugrunde, ein Bohrwerkzeug zu schaffen, das in der Lage ist, tiefe Löcher mit hoher Schnittleistung und andererseits mit sehr hoher Präzision vorzunehmen.Of the Invention has for its object to provide a drilling tool that is capable of deep holes with high cutting power and on the other hand with very high precision.

Im folgenden werden die Erfindung und deren Ausgestaltungen im Zusammenhang mit den Figuren näher erläutert.in the The following are the invention and its embodiments related closer with the figures explained.

Es zeigen:It demonstrate:

1 zeigt eine Darstellung eines geradgenuteten Tieflochbohrers (1) 1 shows a representation of a straight grooved deep hole drill ( 1 )

2 zeigt einen geradgenuteten Tieflochbohrer (1) mit einem zylindrischen Kerndurchmesser (2) 2 shows a straight grooved deep hole drill ( 1 ) with a cylindrical core diameter ( 2 )

3 zeigt die Kernabstufung (10) hinter dem Schneidenbereich 3 shows the core grading ( 10 ) behind the cutting area

In 1 ist ein gattungsgemäßer Tieflochbohrer (1) mit geradgenuteter Spannut (5), mit einer Hauptschneide (6), einer Primärfreifläche (7) zu entnehmen.In 1 is a generic deep hole drill ( 1 ) with straight grooved flute ( 5 ), with a main cutting edge ( 6 ), a primary open space ( 7 ) refer to.

In der 2 wird eine Darstellung des in 1 dargestellten Tieflochbohrers mit seinem zylindrischen Kerndurchmesser gezeigt. Hinter dem Schneidenbereich (8), ausgehend vom Werkzeugkopf (9), befindet sich der zylindrische liegende Kerndurchmesser vom Werkzeugkopf bis hin zum Werkzeugschaft.In the 2 becomes a representation of in 1 shown shown deep hole drill with its cylindrical core diameter. Behind the cutting area ( 8th ), starting from the tool head ( 9 ), is the cylindrical core diameter lying from the tool head to the tool shank.

3 zeigt den vorderen Teil des Tieflochbohrers welcher unmittelbar hinter seinem Schneidenbereich eine Kernabstufung (10) besitzt, welche dem Span abrupt einen größren Spanraum zur Verfügung stellt. 3 shows the front part of the deep hole drill which immediately behind its cutting area a core grading ( 10 ), which abruptly provides the chip with a larger chip space.

Claims (3)

Bohrwerkzeug mit einem wesentlichen zylindrischen Schaft und einen Schneidteil, dessen Spannuten von der Bohrerspitze bis zum Schaft durchgehend verlaufen, dadurch gekennzeichnet, dass der Kerndurchmesser (2) mindestens eine Abstufung (10) besitzt.Drilling tool having a substantial cylindrical shaft and a cutting part, the flutes of which run continuously from the drill bit to the shaft, characterized in that the core diameter ( 2 ) at least one gradation ( 10 ) owns. Bohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass der Kerndurchmesser (2) zylindrisch verläuft.Drilling tool according to claim 1, characterized in that the core diameter ( 2 ) is cylindrical. Bohrwerkzeug nach Anspruch 1 bis 2, dadurch gekennzeichnet, dass der Tieflochbohrer (1) gewendelte oder geradgenutete Spannuten besitzt.Drilling tool according to claim 1 to 2, characterized in that the deep hole drill ( 1 ) has coiled or geradgenuteten flutes.
DE102005045744A 2005-09-23 2005-09-23 Drilling tool for workpiece, has cutting part and deep hole drill with chip flutes that continuously runs from drill bit to shaft, where core diameter of drill has grading, which is pulled by force, such that depth of chip flute is enlarged Ceased DE102005045744A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102005045744A DE102005045744A1 (en) 2005-09-23 2005-09-23 Drilling tool for workpiece, has cutting part and deep hole drill with chip flutes that continuously runs from drill bit to shaft, where core diameter of drill has grading, which is pulled by force, such that depth of chip flute is enlarged

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005045744A DE102005045744A1 (en) 2005-09-23 2005-09-23 Drilling tool for workpiece, has cutting part and deep hole drill with chip flutes that continuously runs from drill bit to shaft, where core diameter of drill has grading, which is pulled by force, such that depth of chip flute is enlarged

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DE102005045744A1 true DE102005045744A1 (en) 2007-03-29

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2675582A2 (en) * 2011-02-15 2013-12-25 Somta Tools (Pty) Ltd. Rotary cutter
CN103692002A (en) * 2013-12-27 2014-04-02 大连远东工具有限公司 Drilling bit
CN113427207A (en) * 2021-06-09 2021-09-24 东台升华工具有限公司 Post-treatment process for chip groove of straight-groove drill bit for aluminum

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63260713A (en) * 1987-04-17 1988-10-27 Sumitomo Electric Ind Ltd Blank for extra-hard solid drill and its manufacture
EP0712343B1 (en) * 1993-08-06 1998-12-30 KENNAMETAL HERTEL AG Werkzeuge + Hartstoffe Twist drill
JP2002144123A (en) * 2000-11-14 2002-05-21 Mitsubishi Materials Corp Drill

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63260713A (en) * 1987-04-17 1988-10-27 Sumitomo Electric Ind Ltd Blank for extra-hard solid drill and its manufacture
EP0712343B1 (en) * 1993-08-06 1998-12-30 KENNAMETAL HERTEL AG Werkzeuge + Hartstoffe Twist drill
JP2002144123A (en) * 2000-11-14 2002-05-21 Mitsubishi Materials Corp Drill

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2675582A2 (en) * 2011-02-15 2013-12-25 Somta Tools (Pty) Ltd. Rotary cutter
EP2675582A4 (en) * 2011-02-15 2014-11-05 Somta Tools Pty Ltd Rotary cutter
CN103692002A (en) * 2013-12-27 2014-04-02 大连远东工具有限公司 Drilling bit
CN113427207A (en) * 2021-06-09 2021-09-24 东台升华工具有限公司 Post-treatment process for chip groove of straight-groove drill bit for aluminum

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OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8110 Request for examination paragraph 44
R081 Change of applicant/patentee

Owner name: GUEHRING KG, DE

Free format text: FORMER OWNER: GUEHRING OHG, 72458 ALBSTADT, DE

Effective date: 20140203

R002 Refusal decision in examination/registration proceedings
R003 Refusal decision now final