DE3924271A1 - Drill bit with spiral thread - produces holes of greater dia. than drill chuck - Google Patents

Drill bit with spiral thread - produces holes of greater dia. than drill chuck

Info

Publication number
DE3924271A1
DE3924271A1 DE19893924271 DE3924271A DE3924271A1 DE 3924271 A1 DE3924271 A1 DE 3924271A1 DE 19893924271 DE19893924271 DE 19893924271 DE 3924271 A DE3924271 A DE 3924271A DE 3924271 A1 DE3924271 A1 DE 3924271A1
Authority
DE
Germany
Prior art keywords
drill
drill bit
spiral
drilling
concrete
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.)
Withdrawn
Application number
DE19893924271
Other languages
German (de)
Inventor
Artur Prof Dr Fischer
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.)
Fischerwerke Artur Fischer GmbH and Co KG
Original Assignee
Fischerwerke Artur Fischer GmbH 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.)
Filing date
Publication date
Application filed by Fischerwerke Artur Fischer GmbH and Co KG filed Critical Fischerwerke Artur Fischer GmbH and Co KG
Priority to DE19893924271 priority Critical patent/DE3924271A1/en
Publication of DE3924271A1 publication Critical patent/DE3924271A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/08—Drills combined with tool parts or tools for performing additional working
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

The drill bit is for prodn. of cylindrical holes in concrete and other building materials. The drill bit comprises a drill stem (1) with a spiral (2) attached to a hardened steel head (4) with cutting faces (5). The spiral attached to the stem has faces (6) projecting for alignment. The drill bit is driven by percussion drill. During drilling operations waste materials are produced and brought to the surface through the rotational movement of the spiral. The configuration of the spiral on the drill shank allows cylindrical holes with a dia. greater than the drill chuck diameter to be formed. Greater drilling accuracy and production is achieved with the drill bit in concrete or other building materials in vertical or horizontal location. USE - Drilling in concrete etc.

Description

Die Erfindung betrifft einen Bohrer zur Herstellung zylindrischer Bohrlöcher gemäß der Gattung des Hauptanspruches.The invention relates to a drill for producing cylindrical boreholes according to the type of the main claim.

Zum Bohren in harten Baustoffen wie Beton oder dergzeichen werden Bohrer verwendet, die mit einer Stirn- und Seitenschneiden aufweisenden Bohrplane aus Hartmetall ausgerüstet sind. Im Bereich der Bohrplatte weist der mit einer Wendel versehene Bohrschaft einen weitgehendst vollen Querschnitt auf, um die Bohrplane vollflächig abzustützen. Im Bereich des Bohrkopfes weist somit der Bohrer einen größeren Durchmesser auf, als im übrigen Bereich des Bohrschaf­ tes.Drills are used for drilling in hard building materials such as concrete or dergzeichen a hard metal drilling tarpaulin with front and side cutting edges. in the In the area of the drill plate, the drill shaft provided with a helix largely has one full cross-section to support the entire tarpaulin. In the area of the drill head the drill thus has a larger diameter than in the rest of the drill sheep tes.

Bei der Herstellung zylindrischer Bohrlöcher kann es dabei insbesondere in den Fällen zu Ver­ klemmungen kommen, wenn Bohrlöcher größerer Tiefe erstellt werden sollen. Die Verklem­ mungen hemmen dabei einerseits den Bohrfortschritt und führen andererseits zu kurzzeitigen Drehunterbrechungen, die Ranermarken und somit unrunde Bohrlöcher verursachen. Auch kann die Längsführung des Bohrers im Bohrloch beeinträchtigt sein.In the production of cylindrical boreholes, it can be Ver Clamping occurs when drilling holes of greater depth. The Verklem On the one hand, inhibitions prevent drilling progress and on the other hand lead to short-term Interruptions in rotation that cause ranemarks and therefore non-round boreholes. Can too the longitudinal guidance of the drill in the borehole may be impaired.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Bohrer der eingangs genannten Art so auszubilden, daß Verklemmungen bei der Herstellung eines Bohrloches vermieden werden und eine exakte Längsführung des Bohrers gewährleistet ist.The invention is therefore based on the object of a drill of the type mentioned train that jams are avoided in the production of a borehole and an exact longitudinal guidance of the drill is guaranteed.

Die Lösung dieser Aufgabe wird bei einem Bohrer der eingangs genannten Gattung durch die im kennzeichnenden Teil des Hauptanspruches angegebenen Merkmale erhalten. Durch die Anord­ nung von Stiften an der Oberfläche der den Bohrschaft umlaufenden Wendel werden Verklem­ mungen des Bohrschanes im Bohrloch vermieden.The solution to this problem is in a drill of the type mentioned in the characteristic part of the main claim specified features. By the arrangement Pins on the surface of the helix surrounding the drill shaft become jammed Avoidance of the drilling guide in the borehole.

Die angeordneten Stifte fräsen die Randbereiche des Bohrloches frei und gewährleisten eine axial geradlinig verlaufende Längsführung des Bohrers während des Bohrvorganges.The arranged pins mill the edge areas of the borehole freely and guarantee one axially straight longitudinal guide of the drill during the drilling process.

Dieser Effekt wird insbesondere dadurch erreicht, daß der Durchmesser des Bohrers in dem Bereich, in dem die Sifte an der Wendel des Bohrschaftes angeordnet sind, dem Durchmesser des Bohrkopfes entspricht. Verklemmungen, die die Rotationsbewegung des Bohrers unterbre­ chen, können somit in dem oberhalb des Bohrkopfes gelegenen Bereich des Bohrschaftes nicht mehr auftreten.This effect is achieved in particular in that the diameter of the drill in the Area in which the pins are arranged on the helix of the drill shaft, the diameter corresponds to the drill head. Jams that stop the rotary movement of the drill Chen, can not in the area of the drill shaft located above the drill head  occur more.

In der Zeichnung ist ein Ausführungsbeispiez der Erfindung dargestellt.An exemplary embodiment of the invention is shown in the drawing.

Der Bohrer besteht aus einem Bohrschan 1, der von einer Wendez 2 umlaufen wird. Der Bohrer wird mittels einer Bohreraufnahme 3 in einen, aus der Zeichnung nicht ersichtlichen Bohrhammer eingesetzt.The drill consists of a drilling shank 1 , which is surrounded by a turning point 2 . The drill is inserted into a rotary hammer (not shown in the drawing) by means of a drill holder 3 .

An der der Bohreraufnahme 3 abgelegenen Stirnseite des Bohrschaftes 1 befindet sich der Bohr­ kopf 4, an dem eine Stirn- und Seitenschneiden aufweisende Bohrplatte 5 angeordnet ist.On the end of the drill shaft 1 remote from the drill receptacle 3 there is the drill head 4 , on which an end and side cutting drill plate 5 is arranged.

An der Oberfläche der Wendel 2 sind erfindungsgemäß Stifte 6 vorgesehen. Unter Einbeziehung der Länge der Stifte 6 entspricht der Durchmesser des Bohrschanes 1 im Bereich der Wendel 2 dem Durchmesser des Bohrkopfes 4.Pins 6 are provided according to the invention on the surface of the helix 2 . Including the length of the pins 6 , the diameter of the drilling guide 1 in the area of the helix 2 corresponds to the diameter of the drilling head 4 .

Bei Einführung des Bohrers, insbesondere bei Bohrungen in harten Baustoffen, wird durch die an der Wendel 2 angeordneten Stifte 6 der Randbereich des Bohrloches 7 ausgefräst, wodurch Ver­ klemmungen des Bohrers während des Bohrvorganges vermieden werden. Ebenfalls wird eine Zentrierung des Bohrers erreicht, wodurch eine geradlinig axial verlaufende Längsführung des Bohrers gewährleistet ist.When the drill is introduced, in particular when drilling in hard building materials, the edge region of the borehole 7 is milled out by the pins 6 arranged on the helix 2 , as a result of which the drill is prevented from jamming during the drilling process. A centering of the drill is also achieved, which ensures a straight axial longitudinal guidance of the drill.

Claims (3)

1. Bohrer zur Herstellung zylindrischer Bohrlöcher bestehend aus einem Bohrschaft und einem Stirn- und Seitenschneiden aufweisenden Hartmetallbohrkopf, der größer als der Durchmesser des Bohrschaftes ist, wobei am Bohrschaft eine Wendel ausgebildet ist, dadurch gekennzeichnet, daß an der Oberfläche der Wendel (2) in Abständen Stifte (6) angeordnet sind.1. Drill for the production of cylindrical boreholes consisting of a drill shaft and a face and side cutting carbide drill head which is larger than the diameter of the drill shaft, wherein a helix is formed on the drill shaft, characterized in that on the surface of the helix ( 2 ) in Intervals pins ( 6 ) are arranged. 2. Bohrer nach Anspruch 1, dadurch gekennzeichnet, daß die Stifte, bezogen auf die Achse des Bohrschaftes (1) versetzt zueinander angeordnet sind.2. Drill according to claim 1, characterized in that the pins, relative to the axis of the drill shaft ( 1 ), are arranged offset from one another. 3. Bohrer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Durchmesser des Bohrers in dem Bereich, in dem die Stifte (6) an der Wendel (2) des Bohrschaftes (1) angeordnet sind, dem Durchmesser des Bohrkopfes (4) entspricht.3. Drill according to claim 1 or 2, characterized in that the diameter of the drill in the area in which the pins ( 6 ) on the helix ( 2 ) of the drill shaft ( 1 ) are arranged corresponds to the diameter of the drill head ( 4 ) .
DE19893924271 1989-07-22 1989-07-22 Drill bit with spiral thread - produces holes of greater dia. than drill chuck Withdrawn DE3924271A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893924271 DE3924271A1 (en) 1989-07-22 1989-07-22 Drill bit with spiral thread - produces holes of greater dia. than drill chuck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893924271 DE3924271A1 (en) 1989-07-22 1989-07-22 Drill bit with spiral thread - produces holes of greater dia. than drill chuck

Publications (1)

Publication Number Publication Date
DE3924271A1 true DE3924271A1 (en) 1991-01-31

Family

ID=6385598

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893924271 Withdrawn DE3924271A1 (en) 1989-07-22 1989-07-22 Drill bit with spiral thread - produces holes of greater dia. than drill chuck

Country Status (1)

Country Link
DE (1) DE3924271A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2743997A1 (en) * 1996-01-26 1997-08-01 Ernewein Jean Michel Oyster opener avoiding injury risk to user

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202228A (en) * 1963-01-30 1965-08-24 Allan C Schuster Drill apparatus and drill bit for enlarging apertures
DE2051811A1 (en) * 1970-10-22 1972-04-27 Fried. Krupp Gmbh, 4300 Essen Well drilling bit - using protruding hard metal pin guides to reduce friction heating
DE3718158A1 (en) * 1987-05-29 1988-12-15 Upat Max Langensiepen Kg Device for producing an undercut in a cylindrically predrilled hole and anchor rod for inserting in a drilled hole
DE3743364A1 (en) * 1987-12-21 1989-07-06 Fischer Artur Werke Gmbh DRILL

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202228A (en) * 1963-01-30 1965-08-24 Allan C Schuster Drill apparatus and drill bit for enlarging apertures
DE2051811A1 (en) * 1970-10-22 1972-04-27 Fried. Krupp Gmbh, 4300 Essen Well drilling bit - using protruding hard metal pin guides to reduce friction heating
DE3718158A1 (en) * 1987-05-29 1988-12-15 Upat Max Langensiepen Kg Device for producing an undercut in a cylindrically predrilled hole and anchor rod for inserting in a drilled hole
DE3743364A1 (en) * 1987-12-21 1989-07-06 Fischer Artur Werke Gmbh DRILL

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2743997A1 (en) * 1996-01-26 1997-08-01 Ernewein Jean Michel Oyster opener avoiding injury risk to user

Similar Documents

Publication Publication Date Title
DE69630842T2 (en) masonry drill
EP0044386B1 (en) Drilling device for obtaining an undercut hole
EP0625400A1 (en) Tool for the formation of an internal thread
EP1348528A2 (en) Guiding insert for a core drill
EP0470354B1 (en) Drill to make cylindrical holes
DE3143591A1 (en) Dental spiral drill
DE102011006015A1 (en) Tapping System
EP0454950A2 (en) Device for making holes with intercutting
DE4011441A1 (en) ROCK DRILL
DE3843465A1 (en) Device for clamping tools
DE112008000158T5 (en) Drill bit and single pass drill
DE69607539T2 (en) drill
DE3924271A1 (en) Drill bit with spiral thread - produces holes of greater dia. than drill chuck
EP0343653B1 (en) Milling tool and process for underreaming drilling holes
EP0302202A2 (en) Device for attaching fasteners
EP0038917B1 (en) Drilling unit to manufacture holes
DE3443636C2 (en) Letter hole drill for use in a hammer or impact drill
DE3829216C2 (en)
EP0503247A1 (en) Drill for making holes with an undercutting
EP0171521B1 (en) Drilling device for holes having undercuttings at different positions
EP0195265B1 (en) Tool for undercutting bore holes
DE2826413A1 (en) Hand drill guide for hole cutting - has clamp for drill on crank, parallel to pin in hole
AT522202B1 (en) Drilling tool
DE2833778A1 (en) Boring head guide with wear resistant slider - has replaceable sliding piece held by clamping screws and springs
DE3840082C2 (en) Device for producing undercuts in boreholes

Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee