DE560567C - Conical rivet hole reamer with helical flutes wound in the direction of rotation, the cutting teeth of which are interrupted by chip breaking flutes - Google Patents
Conical rivet hole reamer with helical flutes wound in the direction of rotation, the cutting teeth of which are interrupted by chip breaking flutesInfo
- Publication number
- DE560567C DE560567C DEZ18538D DEZ0018538D DE560567C DE 560567 C DE560567 C DE 560567C DE Z18538 D DEZ18538 D DE Z18538D DE Z0018538 D DEZ0018538 D DE Z0018538D DE 560567 C DE560567 C DE 560567C
- Authority
- DE
- Germany
- Prior art keywords
- flutes
- interrupted
- rotation
- rivet hole
- cutting teeth
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D77/00—Reaming tools
- B23D77/12—Reamers with cutting edges arranged in tapered form
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Description
Es sind bereits Nietlochreibahlen mit schraubenförmig in Drehrichtung gewundenen Spannuten bekannt geworden, bei denen die durch die Spannuten gebildeten Schneidkanten durch Spanbrechnuten unterbrochen wurden. An den Unterbrechungsstellen entstanden dabei spiralbohrerähnliche Schneidlippen, die den Zweck hatten, die langen Schneidkanten zu ersetzen, und die eine bessere Spanabnahme gewährleisten. Ein wesentlicher Nachteil dieser Anordnung besteht aber darin, daß stets eine der Anzahl der Spannuten entsprechende Anzahl Schneidlippen in einer Ebene senkrecht zur Reibahlenachse liegen und daher gleichzeitig in das Material eingeführt werden. Dadurch ist die Reibahle im Augenblick des Anschneidens stark überlastet und außerdem entsteht keine gleichmäßig aufgeriebene, sondern eine stufenförmige Bohrung. Die Herstellung dieser Reibahlen ist außerdem sehr zeitraubend, da die ringförmigen Spanbrechnuten an jeder Unterbrechungsstelle hinterdreht werden müssen.There are already rivet hole reamers with helically wound in the direction of rotation Chip flutes have become known in which the cutting edges formed by the chip flutes were interrupted by chip breaker grooves. Originated at the points of interruption while cutting lips similar to twist drills, which had the purpose of creating the long ones To replace cutting edges, and which ensure better chip removal. There is a major disadvantage of this arrangement but in the fact that there is always a number of cutting lips corresponding to the number of flutes lie in a plane perpendicular to the reamer axis and are therefore introduced into the material at the same time. This is the reamer is heavily overloaded at the moment of incision and there is also none evenly rubbed, but a stepped hole. The making of this Reaming is also very time consuming because of the annular chip breaker grooves on each Interruption point must be turned back.
Die vorliegende Erfindung bezieht sich auf eine konische Nietlochreibahle, durch welche die oben angeführten Mangel beseitigt werden, und deren kennzeichnendes Merkmal darin besteht, daß die Spanbrechnuten in Form eines ein- oder mehrgängigen Gewindes ausgebildet sind, dessen Steigungswinkel den Anstellwinkel für die Schneidlippe bildet. Außerdem bleibt ein Teil der zwischen den Schneidlippen liegenden Schneidkanten stehen, wodurch erreicht wird, daß die Reibahle nicht ganz durchgerieben zu werden braucht, da bei jedem Durchmesser eine glatte Bohrung entsteht. The present invention relates to a conical rivet hole reamer through which the defects listed above are eliminated, and their distinguishing features consists in the fact that the chipbreaking grooves are in the form of a single or multiple thread are formed, the pitch angle forms the angle of attack for the cutting lip. In addition, some of the cutting edges between the cutting lips remain, whereby it is achieved that the reamer does not need to be rubbed through completely, because at every diameter creates a smooth hole.
Auf der Zeichnung ist eine beispielsweise Ausführung der Erfindung dargestellt, und zwar zeigtIn the drawing, an example embodiment of the invention is shown, and although shows
Abb. ι einen Aufriß,Fig. Ι an elevation,
Abb. 2 einen Querschnitt durch einen Gewindegang, Fig. 2 a cross section through a thread turn,
Abb. 3 eine Abwicklung des Kegelmantels undFig. 3 a development of the cone shell and
Abb. 4 eine Ansicht der Schneidkante in stark vergrößertem Maßstabe.Fig. 4 is a view of the cutting edge on a greatly enlarged scale.
In den konischen Reibahlenkörper α sind mehrere rechtsgewundene Spannuten b eingearbeitet, die von einem ebenfalls in den konischen Reibahlenkörper α eingeschnittenen Rechtsgewinde c durchbrochen werden, das erstens den Zweck hat, die Schneidkante d, die durch die Spannute b gebildet wird, so zu unterbrechen, daß nicht die ganze Schneidkante d auf einmal angreift, und zweitens mit der Schneidkante d der Spannute b den Brustwinkel α und den Anstellwinkel β bildet, welche durch besondere Ausbildung des Gewindes c wie bei der Schneidkante eines Spiralbohrers wirken (Abb. 4). Dadurch wird erreicht, daß der Hauptspan nicht von der Schneidkante d abgenommen wird, sondern durch die durch das Gewinde c gebildete Schneidkante e, die der eines Spiralbohrers gleicht, während die Schneidkantend nur zum Nachschlichten benutzt werden. Dadurch wird außerdem eine größere Lebensdauer der Reibahle erreicht. Aus Abb. 4 ist ersichtlich, wie das Material von der Schneidkante e weggeschnitten wird. Durch die Anordnung des Rechtsgewindes c ist trotz Rechtsdrall der Schneidkanten d kein Hineinziehen und Festklemmen der Reibahle in der Bohrung zu befürchten, da die Schneidkante e sich auf das Material aufsetzt.In the conical reamer body α several right-hand flutes b are incorporated, which are pierced by a right-hand thread c also cut into the conical reamer body α , which firstly has the purpose of interrupting the cutting edge d, which is formed by the flute b , so that does not attack the entire cutting edge d at once, and secondly, with the cutting edge d of the flute b, forms the face angle α and the incidence angle β , which, due to the special design of the thread c, act like the cutting edge of a twist drill (Fig. 4). This ensures that the main chip is not removed from the cutting edge d , but by the cutting edge e formed by the thread c , which is similar to that of a twist drill, while the cutting edge ends are only used for finishing. This also results in a longer service life for the reamer. From Fig. 4 it can be seen how the material is cut away from the cutting edge e. Due to the arrangement of the right-hand thread c , despite the right-hand twist of the cutting edges d, there is no need to worry about the reamer being pulled in or jamming in the bore, since the cutting edge e touches the material.
Für verschiedene zu bearbeitende Materialien kann die Steigung der Spannuten b sowie des Gewindes c verschieden groß gewählt werden, so daß die dem Material entsprechenden Brust- und Anstellwinkel entstehen.For different materials to be machined, the pitch of the flutes b and of the thread c can be selected to be of different sizes, so that the face and angle of incidence corresponding to the material arise.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEZ18538D DE560567C (en) | Conical rivet hole reamer with helical flutes wound in the direction of rotation, the cutting teeth of which are interrupted by chip breaking flutes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEZ18538D DE560567C (en) | Conical rivet hole reamer with helical flutes wound in the direction of rotation, the cutting teeth of which are interrupted by chip breaking flutes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE560567C true DE560567C (en) | 1932-10-04 |
Family
ID=7624613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEZ18538D Expired DE560567C (en) | Conical rivet hole reamer with helical flutes wound in the direction of rotation, the cutting teeth of which are interrupted by chip breaking flutes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE560567C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1979000344A1 (en) * | 1977-12-05 | 1979-06-28 | Engstroem G | Root canal file and method of manufacturing it |
EP0195838A1 (en) * | 1985-03-27 | 1986-10-01 | Rockwell International Corporation | Reamer with unequally spaced flutes |
WO2009143973A1 (en) * | 2008-05-30 | 2009-12-03 | Kennametal Inc. | Reamer |
US8931981B2 (en) | 2008-05-15 | 2015-01-13 | Kennametal Inc. | Pull reamer |
-
0
- DE DEZ18538D patent/DE560567C/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1979000344A1 (en) * | 1977-12-05 | 1979-06-28 | Engstroem G | Root canal file and method of manufacturing it |
EP0195838A1 (en) * | 1985-03-27 | 1986-10-01 | Rockwell International Corporation | Reamer with unequally spaced flutes |
US8931981B2 (en) | 2008-05-15 | 2015-01-13 | Kennametal Inc. | Pull reamer |
WO2009143973A1 (en) * | 2008-05-30 | 2009-12-03 | Kennametal Inc. | Reamer |
US8708618B2 (en) | 2008-05-30 | 2014-04-29 | Kennametal Inc. | Reamer |
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