DE911799C - Drilling tool for drilling soft metals - Google Patents

Drilling tool for drilling soft metals

Info

Publication number
DE911799C
DE911799C DEJ2468D DEJ0002468D DE911799C DE 911799 C DE911799 C DE 911799C DE J2468 D DEJ2468 D DE J2468D DE J0002468 D DEJ0002468 D DE J0002468D DE 911799 C DE911799 C DE 911799C
Authority
DE
Germany
Prior art keywords
drilling
drill
soft metals
drilling tool
tool
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
Application number
DEJ2468D
Other languages
German (de)
Inventor
Walter Meyer
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.)
Airbus Defence and Space GmbH
Original Assignee
Messerschmitt Bolkow Blohm AG
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 Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Priority to DEJ2468D priority Critical patent/DE911799C/en
Application granted granted Critical
Publication of DE911799C publication Critical patent/DE911799C/en
Expired 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
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
    • B23B2228/28—Soft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/18—Configuration of the drill point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/46—Drills having a centre free from cutting edges or with recessed cutting edges

Landscapes

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

Description

Beim Bohren von verhältnismäßig weichen Metallen mit den üblichen Spiralbohrern wird das Material durch die Bohrerspitze sowohl an der Bohrereintrittsseite als auch an dessen Austrittsseite nach außen gedrückt. Es zeigt sich an beiden Seiten des Werkstückes ein Grat oder Krater, der durch einen zweiten Arbeitsgang weggenommen werden muß. Es ist so eine Nacharbeit erforderlich, die besonders bei großen Stückzahlen einen unerwünschten Arbeitsaufwand mit sich bringt. Erfindungsgemäß wird vorgeschlagen, diesen 1`?achteil dadurch zu beseitigen, daß die Bohrerschneiden an der Mantellinie über die Mitte des Bohrers hinausragen. Der Bohrer wird nach der Erfindung vorteilhaft so ausgeführt, daß der Scheitelpunkt des Spitzenwinkels nach innen gerichtet ist.When drilling relatively soft metals with the usual Twist drills gets the material through the drill tip both on the drill entry side as well as pressed outwards on its exit side. It shows on both sides the workpiece has a ridge or crater that is removed by a second operation must become. Such reworking is necessary, especially with large quantities entails an undesirable amount of work. According to the invention it is proposed to eliminate this disadvantage by keeping the drill cutting edge on the surface line protrude beyond the center of the drill. The drill is advantageous according to the invention designed so that the apex of the apex angle is directed inward.

In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes dargestellt.The drawing shows an embodiment of the subject matter of the invention shown.

Der Spiralbohrer z ist an seinem vorderen Ende so geschliffen, daß sich ein Krater :2 bildet. Beim Bohren treffen zuerst die Kanten 3 das Werkstück und arbeiten sich ein. Durch den Krater verläuft die Richtung, in der das Material weggequetscht wird, nach der Mitte des Bohrers. Auf diese Weise kann kein störender Grat entstehen. Noch auffälliger ist der Erfolg beim Austreten des Bohrers aus dem Werkstück. Durch die an der Mantellinie vorstehenden Schneidkanten wird das Material in Form eines kleinen Pfropfens herausgeschnitten, so daß gar keine dünne Stelle entsteht, die herausgedrückt werden kann.The twist drill z is ground at its front end so that a crater: 2 forms. When drilling, the edges 3 hit the workpiece first and get used to it. The direction in which the material runs through the crater is squeezed away after the center of the drill. That way, there can be no more disruptive Ridge arise. Even more noticeable is the success when the drill emerges from the Workpiece. The cutting edges protruding from the surface line make the material cut out in the form of a small plug so that there is no thin spot at all arises that can be pushed out.

Claims (1)

PATENTANSPRÜCHE: r. Bohrwerkzeug zum Bohren weicher Metalle, z. B. Leichtmetalle, dadurch gekennzeichnet, daß die Bohrerschneiden an der Mantellinie über die Mitte des Bohrers hinausragen. z. Bohrwerkzeug nach Anspruch i, dadurch gekennzeichnet, daß der Scheitelpunkt des Spitzenwinkels des Bohrers nach innen gerichtet ist.PATENT CLAIMS: r. Drilling tool for drilling soft metals, e.g. B. Light metals, characterized in that the drill cutting edges are on the surface line protrude beyond the center of the drill. z. Drilling tool according to claim i, characterized characterized in that the apex of the point angle of the drill is inward is directed.
DEJ2468D 1943-01-24 1943-01-24 Drilling tool for drilling soft metals Expired DE911799C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEJ2468D DE911799C (en) 1943-01-24 1943-01-24 Drilling tool for drilling soft metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEJ2468D DE911799C (en) 1943-01-24 1943-01-24 Drilling tool for drilling soft metals

Publications (1)

Publication Number Publication Date
DE911799C true DE911799C (en) 1954-05-20

Family

ID=7197876

Family Applications (1)

Application Number Title Priority Date Filing Date
DEJ2468D Expired DE911799C (en) 1943-01-24 1943-01-24 Drilling tool for drilling soft metals

Country Status (1)

Country Link
DE (1) DE911799C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2600225A1 (en) * 1975-01-20 1976-07-22 Sandvik Ab DRILLING TOOL
DE3339211A1 (en) * 1982-10-29 1984-05-03 Nippon Oil and Fats Co., Ltd., Tokyo DRILLING AND MILLING TOOL
WO2001091960A1 (en) * 2000-05-26 2001-12-06 Nygaard Eero Drill bit
DE102011011678B4 (en) 2010-09-16 2019-04-18 Hans Walter Mohr Gmbh Method for producing a borehole

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2600225A1 (en) * 1975-01-20 1976-07-22 Sandvik Ab DRILLING TOOL
DE3339211A1 (en) * 1982-10-29 1984-05-03 Nippon Oil and Fats Co., Ltd., Tokyo DRILLING AND MILLING TOOL
WO2001091960A1 (en) * 2000-05-26 2001-12-06 Nygaard Eero Drill bit
US6857832B2 (en) 2000-05-26 2005-02-22 Sandvik Ab Drill bit with pilot point
DE102011011678B4 (en) 2010-09-16 2019-04-18 Hans Walter Mohr Gmbh Method for producing a borehole
DE102011011678B8 (en) 2010-09-16 2022-05-19 Hans Walter Mohr Gmbh Method of drilling a borehole

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