DE97884C - - Google Patents

Info

Publication number
DE97884C
DE97884C DENDAT97884D DE97884DA DE97884C DE 97884 C DE97884 C DE 97884C DE NDAT97884 D DENDAT97884 D DE NDAT97884D DE 97884D A DE97884D A DE 97884DA DE 97884 C DE97884 C DE 97884C
Authority
DE
Germany
Prior art keywords
drill
shape
milling
end surfaces
countersinking
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.)
Active
Application number
DENDAT97884D
Other languages
German (de)
Publication of DE97884C publication Critical patent/DE97884C/de
Active legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23CMILLING
    • B23C5/00Milling-cutters
    • B23C5/02Milling-cutters characterised by the shape of the cutter
    • B23C5/10Shank-type cutters, i.e. with an integral shaft
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • B23B51/02Twist drills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2251/00Details of tools for drilling machines
    • B23B2251/18Configuration of the drill point
    • 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
    • B23B2251/406Flutes, i.e. chip conveying grooves of special form not otherwise provided for

Landscapes

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

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Die gebräuchlichen, als Formfräsen-oder Versenker verwendbaren Bohrer leiden unter dem Nachtheil, dafs sie nur innerhalb verhältnifsmäfsig geringer Grenzen nachschleifbar sind. Dieser Mangel macht sich namentlich dann sehr fühlbar, wenn, wie es z. B. in der Fahrradfabrikation vorkommt, gröfsere Massen von gleichgestalteten Gegenständen (Kugellagerschalen und dergl.) durch Ausfräsen herzustellen sind und demgemäfs ein häufiger Ersatz der Fräsen erforderlich wird.The common ones, as form milling or countersinking Usable drills suffer from the disadvantage that they are only comparatively within can be re-grinded at lower limits. This deficiency is particularly noticeable when, as is the case, for example, B. in bicycle manufacturing occurs to produce larger masses of similarly shaped objects (ball bearing shells and the like.) by milling and therefore frequent replacement of the milling cutters is required.

Die Erfindung bezweckt nun, für solche Verwendungsarten einen Bohrer zu schaffen, welcher, ohne dafs die geringste Aenderung der Querschnittsform stattfindet, innerhalb sehr weiter Grenzen nachschleifbar ist, so dafs ein solcher Bohrer während einer ungemein langen Zeitdauer Verwendung finden kann. Dies wird in der Weise erreicht, dafs der Bohrer als ein- oder mehrgängige Schraube ausgeführt wird, deren Gewindeform. der Gestalt des Querschnittes der zu bohrenden Vertiefung entspricht. Die durch einen senkrecht zur Längsachse geführten Schnitt erzeugten Endflächen dieser Schraube bilden dann zugleich die Stirnflächen des Bohrers.The invention now aims to create a drill for such types of use, which, without the slightest change in the cross-sectional shape, takes place within very further limits can be regrinded, so that such a drill can be used for an extremely long time Can be used for a period of time. This is achieved in such a way that the drill acts as a single or multi-start screw is executed whose thread form. the shape of the cross-section corresponds to the recess to be drilled. The through one perpendicular to the longitudinal axis The end faces of this screw produced by a guided cut then form the end faces at the same time of the drill.

In beiliegender Zeichnung ist ein Bohrer der neuen Art, welcher zur Herstellung von Kugel-. lagerschalen Verwendung finden soll, dargestellt, und es besteht derselbe aus einer zweigängigen Schraube S, deren Gewindeform dem Querschnitt des Hohlkörpers H entspricht. Durch einen senkrechten Schnitt werden am vorderen Ende zwei.in einer Ebene liegende Stirnflächen F F1 gebildet, welche bei der Umdrehung des Bohrers gleichzeitig arbeiten und die gewünschte Vertiefung hervorbringen.In the accompanying drawing is a drill of the new type, which is used for the production of ball. Bearing shells are to be used, shown, and it consists of a two-start screw S, the thread shape of which corresponds to the cross section of the hollow body H. Two end faces FF 1 lying in one plane are formed by a vertical cut at the front end, which work at the same time as the drill rotates and produce the desired indentation.

Durch Nachschleifen kann, wie leicht ersichtlich ist, ein derartiger Bohrer fast der ganzen Länge nach aufgebraucht werden, und man hat es durch entsprechende Bemessung der Länge in der Hand, dem Bohrer eine aufserordentlich lange Benutzungsdauer zu verleihen. Dabei ist es, wie schon erwähnt, als ein besonderer Vortheil zu erachten, dafs die Form der Stirnfläche sich vollständig gleich bleibt, so dafs auch bei der Herstellung sehr grofser Massen die erzeugten Theile genau gleich gestaltet sind.By regrinding, as can easily be seen, such a drill can be used almost as much can be used up along its entire length, and you have it by appropriate dimensioning the length in the hand to give the drill an extraordinarily long period of use. As already mentioned, it is to be regarded as a particular advantage that the The shape of the end face remains completely the same, so that it is also very much during manufacture large masses the produced parts are shaped exactly alike.

Claims (1)

Patent-Anspruch:Patent claim: Zum Fräsen und Versenken dienender Bohrer, dadurch gekennzeichnet, dafs derselbe die Gestalt einer ein- oder mehrgängigen Schraube (S) besitzt, deren durch einen senkrecht zur Längsachse geführten Schnitt entstandene Endflächen (FF1) die arbeitenden Stirnflächen bilden, und die durch Nachschleifen fast der. ganzen Länge nach aufgebraucht werden kann, ohne dafs eine Aenderung der Schneidflächenform eintritt.Drill bits used for milling and countersinking, characterized in that the same has the shape of a single or multiple thread screw (S) , the end surfaces (FF 1 ) of which formed by a cut perpendicular to the longitudinal axis form the working end surfaces, and which by regrinding almost the . can be used up along its entire length without changing the shape of the cutting surface. Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.
DENDAT97884D Active DE97884C (en)

Publications (1)

Publication Number Publication Date
DE97884C true DE97884C (en)

Family

ID=368898

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT97884D Active DE97884C (en)

Country Status (1)

Country Link
DE (1) DE97884C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0024251A2 (en) * 1979-08-17 1981-02-25 Zbigniew Mroczkowski Rotating rod saw

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0024251A2 (en) * 1979-08-17 1981-02-25 Zbigniew Mroczkowski Rotating rod saw
EP0024251A3 (en) * 1979-08-17 1981-07-01 Zbigniew Mroczkowski Apparatus for machining workpieces

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