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
Links
- 238000003801 milling Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007373 indentation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
-
- 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
- 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
- B23B2251/40—Flutes, i.e. chip conveying grooves
- B23B2251/406—Flutes, 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)
Publications (1)
Publication Number | Publication Date |
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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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0024251A2 (en) * | 1979-08-17 | 1981-02-25 | Zbigniew Mroczkowski | Rotating rod saw |
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0
- DE DENDAT97884D patent/DE97884C/de active Active
Cited By (2)
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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