AT86567B - Method of manufacturing twist drills. - Google Patents
Method of manufacturing twist drills.Info
- Publication number
- AT86567B AT86567B AT86567DA AT86567B AT 86567 B AT86567 B AT 86567B AT 86567D A AT86567D A AT 86567DA AT 86567 B AT86567 B AT 86567B
- Authority
- AT
- Austria
- Prior art keywords
- rod
- rollers
- twist drills
- grooves
- spiral
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
Description
<Desc/Clms Page number 1>
Verfahren zur Herstellung von Spiralbohrern.
EMI1.1
<Desc/Clms Page number 2>
Wenn die Walzen mit ihrem verringerten Durchmesser einander gegenüberstehen, d. h. die Kaliber geöffnet sind, wird der Stab von Hand in der Ebene des Kalibers 1 zwischen die Walzen gebracht Der Stab wird dann vom Kaliber erfasst und entgegen der Einführungsrichtung zwischen. den Walzen hindurchgeführt, wobei der Arbeiter die Spindel c frei in der Hand hält. Auf diese Weise wird der Stab in einer Hitze durch sämtliche Kaliber 1 bis/ geführt, wodurch in denselben zwei längsverlaufende, geradlinige Nuten eingewalzt werden.
EMI2.1
und der Stab in derselben Hitze in das geöffnete Kaliber g eingeführt, worauf die Mutter g festgeklemmt wird.
Sobald das Kaliber 8 den Stab erfasst, verschiebt der Arbeiter mit Hilfe des Handgriffes d die Spindel c in der Walzrichtung, wobei die Spindel sich in der Mutter g dreht. Das in die Spindel c eingespannte Stabende wird dabei gegenüber dem zwischen den Walzen befindlichen Stab verdreht, und zwar schreitet die Verdrehung entsprechend dem Durchgang des Stab, es durch die Walzen fort. Auf diese Weise werden schliesslich die beiden Stabenden um einen der Spiralnut f und dem Betrage der Spindel-
EMI2.2
Nuten des Walzstabes Spiralform erhalten.
Da bei ungleicher Festigkeit des Stabmaterials und bei ungleichmässiger Erhitzung des Stabes die Gefahr besteht, dass die Bohrerspirale nicht immer genau ausfällt, wird das mit den Spiraralnuten versehene Werkstück zweckmässig noch zwischen zwei entsprechend kalibrierten Schrägwalzen hindurchgeführt, deren Achsen in einem der Steigung der Spiralnuten entsprechenden Winkel zu einander stehen. Um die Flanken des Stabprofils nicht zu überlasten, empfiehlt es sich, den Stab vor'dem Durchgang durch die Schrägwalzen nochmals zu erhitzen. Beim Schrägwalzen gelangt mit Vorteil ebenfalls die mit Spiralnuten versehene und in einem Lager verschiebbare Spindel zur Führung und zwangläufigen Verdrehung des Werkstückes zur Anwendung, wobei natürlich auch die Schrägwalzen nur auf einem Teile ihres Umfanges kalibriert sind.
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Method of manufacturing twist drills.
EMI1.1
<Desc / Clms Page number 2>
When the rolls face each other with their reduced diameter, i. H. the caliber are open, the rod is brought by hand in the plane of the caliber 1 between the rollers. passed through the rollers, the worker holding the spindle c freely in hand. In this way, the rod is passed through all the caliber 1 to / from in one heat, whereby two longitudinal, straight grooves are rolled into the same.
EMI2.1
and the rod is inserted into the opened caliber g in the same heat, whereupon the nut g is clamped.
As soon as the caliber 8 grips the rod, the worker moves the spindle c in the rolling direction with the aid of the handle d, the spindle rotating in the nut g. The rod end clamped in the spindle c is rotated with respect to the rod located between the rollers, and indeed the rotation proceeds according to the passage of the rod through the rollers. In this way, the two rod ends are finally around one of the spiral groove f and the amount of the spindle
EMI2.2
Grooves of the rolling rod obtained spiral shape.
Since if the rod material is unevenly firm and if the rod is heated unevenly, there is a risk that the drill spiral will not always fail exactly, the workpiece provided with the spiral grooves is expediently passed between two appropriately calibrated inclined rollers, the axes of which are at an angle corresponding to the pitch of the spiral grooves to stand by each other. In order not to overload the flanks of the bar profile, it is advisable to heat the bar again before it passes through the inclined rollers. In the case of skew rolling, the spiral grooved spindle, which is displaceable in a bearing, is advantageously used for guiding and inevitable rotation of the workpiece, with the skew rollers of course only being calibrated on part of their circumference.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE535502X | 1919-01-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT86567B true AT86567B (en) | 1921-12-10 |
Family
ID=6556915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT86567D AT86567B (en) | 1919-01-17 | 1920-08-02 | Method of manufacturing twist drills. |
Country Status (4)
Country | Link |
---|---|
AT (1) | AT86567B (en) |
CH (1) | CH92190A (en) |
FR (1) | FR535502A (en) |
GB (1) | GB157923A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2699080A (en) * | 1951-11-14 | 1955-01-11 | Gen Motors Corp | Apparatus for forming splines on tubular shafts |
-
1920
- 1920-08-02 AT AT86567D patent/AT86567B/en active
- 1920-09-01 FR FR535502D patent/FR535502A/en not_active Expired
- 1920-09-29 CH CH92190D patent/CH92190A/en unknown
-
1921
- 1921-01-10 GB GB163421A patent/GB157923A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH92190A (en) | 1921-12-16 |
FR535502A (en) | 1922-04-15 |
GB157923A (en) | 1922-04-10 |
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