DE3005622A1 - Drill for producing undercut end hole - has shank with helical grooves, wider cutting bit at end and spherical shank guide - Google Patents

Drill for producing undercut end hole - has shank with helical grooves, wider cutting bit at end and spherical shank guide

Info

Publication number
DE3005622A1
DE3005622A1 DE19803005622 DE3005622A DE3005622A1 DE 3005622 A1 DE3005622 A1 DE 3005622A1 DE 19803005622 DE19803005622 DE 19803005622 DE 3005622 A DE3005622 A DE 3005622A DE 3005622 A1 DE3005622 A1 DE 3005622A1
Authority
DE
Germany
Prior art keywords
shank
drill
spherical
helical grooves
hole
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Withdrawn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
DE19803005622
Other languages
German (de)
Inventor
Artur Dr.H.C. 7244 Waldachtal 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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE2349998A external-priority patent/DE2349998C2/en
Application filed by Individual filed Critical Individual
Priority to DE19803005622 priority Critical patent/DE3005622A1/en
Publication of DE3005622A1 publication Critical patent/DE3005622A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • B23B51/0018Drills for enlarging a hole
    • B23B51/0027Drills for enlarging a hole by tool swivelling

Abstract

The drill (1) is intended for producing a cylindrical bore hole with an undercut wider portion at the bottom of this hole. It comprises a drill shank (2) whose end has a plate-shaped cutting bit (3) having lateral cutting edges (5) at a diameter greater than that of the shank and a spherical element (8) to guide the shank in the cylindrical portion of the hole. The shank has helical grooves (20) to remove the cuttings which extend through the element (8) and the end faces (4) of the bit are also provided with cutting edges. This makes it possible to produce the cylindrical bore with an undercut end in one operation.

Description

Bohreinheit zur Herstellung einer Drilling unit for the production of a

Hinterschneidung eines Bohrloches Zusatz zu Patent ... (Patentanmeldung P 23 49 998.1-24) Die Erfindung betrifft eine Bohreinheit aus Bohrschaft und einem mit dem Bohrschaft verbundenen Bohrplättchen zur Herstellung der Hinterschneidung im Bohrloch. Undercut of a borehole Addition to patent ... (patent application P 23 49 998.1-24) The invention relates to a drilling unit made of a drill shaft and a Drilling plates connected to the drill shank for producing the undercut in the borehole.

Die in dem Hauptpatent beschriebene Erfindung hat sich bewährt. Mit ihr ist es in einfacher Weise möglich, im Anschluß an einen zylindrischen Teil des Bohrloches in dessen Tiefe eine konische Hinterschneidung anzubringen. Damit können mit entsprechend ausgestalteten Dübeln formschlüssige Verbindungen hergestellt werden und diese haben gegenüber den bisher ausschließlich möglichen kraftschlüssigen Verbindungen den Vorteil, daß die Umgebung des Bohrloches nicht durch hohe Spreizdruckkräfte überbeansprucht werden kann. The invention described in the main patent has proven itself. With you it is possible in a simple manner, following a cylindrical part of the Drill hole to attach a conical undercut in its depth. So can positive connections can be made with appropriately designed dowels and these have, compared to the previously only possible frictional connections the advantage that the area around the borehole is not affected by high expansion pressure forces can be overused.

Aufgabe der vorliegenden Erfindung ist es, den Gegenstand des Hauptpatentes in seiner Ausgestaltung nach Anspruch 4 dahin zu verbessern, daß das Bohrloch sowohl in seinem zylindrischen Teil als auch in seinem anschließenden konischen Teil in einem Arbeitsgang hergestellt werden kann. The object of the present invention is to provide the subject matter of the main patent in its embodiment according to claim 4 to the effect that the borehole both in its cylindrical part as well as in its adjoining conical part in can be produced in one operation.

Erfindungsgemäß wird dies dadurch erreicht, daß der Bohrschaft mit schraubenlinienförmig angeordnetem Bohrmehl fördernde Nuten versehen ist, die sich im Bereich des kugelförmigen Bundes durch diesen hindurch fortsetzen. According to the invention this is achieved in that the drill shank with helically arranged drill dust is provided promoting grooves, which continue through this in the area of the spherical collar.

Da der Bohrschaft gegenüber dem vom Bohrplättchen beschriebenen Durchmesser kleiner ist, war man bislang der Auffassung, auf die Anbringung von Bohrmehl fördernden Nuten zu verzichten. Durch die Anordnung des kugelförmigen Bundes ist es dabei aber notwendig gewesen, den Bohrer während des Bohrvorganges von Zeit zu Zeit aus dem Bohrloch'herauszunehmen, um das hinter dem kugelförmigen Bund angesammelte Bohrmehl aus dem Bohrloch zu entfernen. Durch die erfindungsgemäße Ausgestaltung des Gegenstandes nach dem Hauptpatent entsprechend Anspruch 4 kann nun auf diese zusätzlichen Maßnahmen verzichtet werden. Die Bohrmehl fördernden Nuten fördern nämlich das Bohrmehl durch den kugelförmigen Bund hindurch, so daß eine kontinuierliche Abfuhr des Bohrmehls sichergestellt ist. Es hat sich dabei gezeigt, daß trotz dieser Bohrmehl fördernden Nuten der kugelförmige Bund dennoch ausreichend auf dem Bohrschaft zu befestigen ist, um die bei ihm auftretenden Kräfte bei der Schwenkbewegung aufzufangen. Because the drill shank compared to the diameter described by the drill bit is smaller, it was previously believed to be conducive to the application of drilling dust Refrain from grooves. Due to the arrangement of the spherical collar, it is included but It has been necessary to remove the drill from time to time during the drilling process Borehole to remove the drill dust that has accumulated behind the spherical collar to remove from the borehole. Due to the design of the object according to the invention according to the main patent according to claim 4, these additional measures can now be used be waived. The drilling dust promoting grooves promote the drilling dust through the spherical collar through, so that a continuous removal of the drill dust is ensured. It has been shown that despite this drilling dust promotional Grooves to secure the spherical collar still sufficiently on the drill shaft is to absorb the forces occurring in it during the pivoting movement.

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

Figur 1 zeigt eine Bohreinheit und Figur 2 einen Querschnitt durch diese.Figure 1 shows a drilling unit and Figure 2 shows a cross section through these.

Die Bohreinheit 1 besteht aus dem Bohrschaft 2 und einem Bohrplättchen 3 aus Hartmetall, das an seiner Stirnseite ebenso mit Bohrschneiden 4 versehen ist wie an seinen Seitenflächen mit Seitenschneiden 5. Am Schaft sind Bohrmehl fördernde Nuten 20 angeordnet, die sich auch im Bereich des kugelförmigen Bundes 8 durch diesen hindurch erstrecken. Ergänzend ist es auch möglich, an der Oberfläche des kugelförmigen Bundes noch weitere Nuten zur zusätzlichen Förderung des Bohrmehls anzubringen.The drilling unit 1 consists of the drill shank 2 and a drill plate 3 made of hard metal, which is also provided with cutting edges 4 on its end face as on its side surfaces with side cutting edges 5. On the shank there are drilling dust conveying Grooves 20 arranged, which are also in the area of the spherical collar 8 through this extend through. In addition, it is also possible on the surface of the spherical Federal to attach further grooves for additional promotion of the drilling dust.

LeerseiteBlank page

Claims (1)

Patentanspruch Bohreinheit bestehend aus einem Bohrschaft und einem mit dem Bohrschaft verbundenen Bohrplättchen zur Herstellung einer Hinterschneidung im Bohrloch nach Anspruch 4 des Patentes (Patentanmeldung P 23 49 998.1-24), dadurch gekennzeichnet, daß der Bohrschaft mit schraubenlinienförmig angeordnetem Bohrmehl fördernden Nuten versehen ist, die sich im Bereich des kugelförmigen Bundes durch diesen hindurch fortsetzen. Patent claim drilling unit consisting of a drill shank and a with the drill shank connected to the drill bit to produce an undercut in the borehole according to claim 4 of the patent (patent application P 23 49 998.1-24), thereby characterized in that the drill shank with helically arranged drill dust promotional grooves is provided, which extend in the area of the spherical collar continue this through.
DE19803005622 1973-10-05 1980-02-15 Drill for producing undercut end hole - has shank with helical grooves, wider cutting bit at end and spherical shank guide Withdrawn DE3005622A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803005622 DE3005622A1 (en) 1973-10-05 1980-02-15 Drill for producing undercut end hole - has shank with helical grooves, wider cutting bit at end and spherical shank guide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2349998A DE2349998C2 (en) 1973-10-05 1973-10-05 Drilling unit for producing an undercut in the borehole
DE19803005622 DE3005622A1 (en) 1973-10-05 1980-02-15 Drill for producing undercut end hole - has shank with helical grooves, wider cutting bit at end and spherical shank guide

Publications (1)

Publication Number Publication Date
DE3005622A1 true DE3005622A1 (en) 1981-08-20

Family

ID=25765902

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803005622 Withdrawn DE3005622A1 (en) 1973-10-05 1980-02-15 Drill for producing undercut end hole - has shank with helical grooves, wider cutting bit at end and spherical shank guide

Country Status (1)

Country Link
DE (1) DE3005622A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3826811A1 (en) * 1988-08-06 1990-02-08 Fischer Artur Werke Gmbh Drilling device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3826811A1 (en) * 1988-08-06 1990-02-08 Fischer Artur Werke Gmbh Drilling device

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