DE378579C

DE378579C - Twist drill milling machine

Info

Publication number: DE378579C
Application number: DER51095D
Authority: DE
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-09-14
Filing date: 1920-09-14
Publication date: 1923-07-20

Description

Die Erfindung betrifft eine. Spiralbohrerfräsmaschine, deren Frässpindel durch die Werkstückvorschubvorrichtung gehoben oder gesenkt und außerdem gegenüber dem Werkstück geschwenkt wird.The invention relates to a. Twist drill milling machine, the milling spindle of which is through the Workpiece feed device raised or lowered and also opposite the workpiece is pivoted.

•Von den bekannten Maschinen dieser Art unterscheidet sich die neue in erster Linie dadurch, daß die Werkstückvorschubvorrichtung auch die Schwenkbewegung der Frässpindel erzeugt. Hierdurch wird die Maschine wesentlich vereinfacht und die Genauigkeit der Arbeit erhöht.• The new one differs primarily from the known machines of this type in that the workpiece feed device also controls the pivoting movement of the milling spindle generated. This considerably simplifies the machine and increases the accuracy of the work.

In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes schematisch veranschaulicht:An exemplary embodiment of the subject matter of the invention is shown schematically in the drawing illustrates:

Abb. ι ist ein Schaubild des um zweiFig. Ι is a diagram of the at two

Achsen drehbaren Werkzeugträgers und eine teilweise geschnittene Vorderansicht der die Bewegungen erzeugenden Teile der Fr äsmaschine, Axes of rotatable tool carrier and a partially sectioned front view of the Parts of the milling machine that generate movements,

Abb. 2 teilweise eine Vorderansicht einer anderen Werkzeugträgersteuerung.Fig. 2 is a partial front view of another tool carrier control.

Abb. 3a, 3b und 3c stellen Einzelheiten dar. Der Fräser α sitzt am freien Ende der Frässpindel α¹, welche im Werkzeugträger b um ihre Achse drehbar gelagert ist. Der Werkzeugträger b ist mittels Zapfen r und Schwalbenschwanzführung r¹ dehbar auf einem Winkel p gelagert, der um einen Zapfen c drehbar ist. Die verlängerte Achse dieses Drehzapfens c schneidet die Achse des Fräsers a. Die Drehzapfen r und c verlaufen in verschiedenen Richtungen, vorzugsweise auch in verschiedenen Ebenen, und sind bei der in der Zeichmmg veranschaulichten Ausführungsform senkrecht zueinander angeordnet. Wenn der Winkel p um den Zapfen c bewegt wird, verschwenkt sich der Fräser α gegen die Werkstückvorschubrichtung und bewirkt dadurch eine Veränderung der Nutenbreite. Bewegt sich umgekehrt der Werkzeugträger b auf dem Winkel p um den Zapfen r, so findet eine senkrechte Auf- oder Abwärtsdrehung des Fräsers α und damit eine Veränderung der Nutentiefe statt. Erfmdungsgemäß sind beide Bewegungen der Frässpindel α¹ miteinander gekuppelt, so daß sie gleichzeitig und in gegenseitiger Abhängigkeit erfolgen müssen. Zu diesem Zweck ist an einer feststehenden Stütze« ein Daumen» befestigt, auf dessen oberer geneigter Leitfläche der Werkzeugträger b mit dem dem Fräser α zugekehrten Teile aufruht. Je nachdem der Winkel ρ nach der einen oder anderen Richtung um Zapfen c geschwenkt wird, findet somit ein Heben oder Senken des Werkzeugträgers b statt. Die Auflage des. Daumens m gegen den Winkel p kann hierbei durch die verschiedenartigsten Mittel gesichert werden, beispielsweise durch Federn, Schwalbenschwanzführungen oder lediglich durch das Eigengewicht. Der Zeichnung ist der einfacheren Darstellung halber der letztere Fall zugrunde gelegt. Durch die Neigung der Fläche des Daumens m ist die Größe der Auf- und Abbewegung des Fräsers in ein ganz bestimmtes Verhältnis zu seiner Verschwenkbewegung gesetzt. Dieses Verhältnis kann durch Einsetzen verschieden geneigter Daumen geändert werden.Fig. 3a, 3b and 3c show details. The milling cutter α sits at the free end of the milling spindle α ¹ , which is rotatably mounted in the tool carrier b about its axis. The tool carrier b is mounted on an angle p by means of a pin r and a dovetail guide r ¹ , which can be rotated about a pin c. The extended axis of this pivot c intersects the axis of the milling cutter a. The pivot pins r and c run in different directions, preferably also in different planes, and are arranged perpendicular to one another in the embodiment illustrated in the drawing. When the angle p is moved around the pin c , the milling cutter α swivels against the workpiece feed direction and thereby causes a change in the groove width. Conversely, if the tool carrier b moves on the angle p around the pin r, the milling cutter α rotates vertically upwards or downwards and thus the depth of the groove changes. According to the invention, both movements of the milling spindle α ¹ are coupled to one another, so that they must take place simultaneously and in mutual dependence. For this purpose, "a thumb" is attached to a stationary support, on the upper inclined guide surface of which the tool carrier b rests with the parts facing the milling cutter α. Depending on whether the angle ρ is pivoted about pin c in one direction or the other, the tool carrier b is raised or lowered. The support of the thumb m against the angle p can be secured by the most varied of means, for example by springs, dovetail guides or simply by its own weight. The drawing is based on the latter case for the sake of simplicity. Due to the inclination of the surface of the thumb m , the size of the up and down movement of the milling cutter is set in a very specific relationship to its pivoting movement. This ratio can be changed by inserting differently inclined thumbs.

In Lagern s ist eine Spindel k achsial ver- 7«In bearings s is a spindle axially comparable k 7 '

Claims

sliding. It is moved back and forth by a lever ζ and carries at its end facing the milling, ser α a clamping head t for the workpiece, not shown. The clamping head t can also perform a rotary movement. K at the other end of the spindle is a sleeve i which in Fig. Ι to the feed direction perpendicular end face against the roll h at a ίο g rotatably mounted double lever is able to create /. The muffle can be attached to the spindle k in such a way that it can be attached to the roller /; applies. This can be adjusted in the slot «of the lever /. The lever f carries at the end facing away from the roller h a gear segment ν, which in the toothing «? a control rod which is movable in the longitudinal direction and can rotate to a limited extent engages; the latter is hinged to the angle p by means of a ball pivot 0 . A helical spring e is arranged between the bearing 2 ^{1 of} the control rod d and a collar / attached to it, which secures the contact of the roller h on the face of the aliiffe i and tries to hold the parts in the position shown in Fig. 1 \.

When the spindle k moves towards the cutter a , the lever f is rotated. It moves the control rod d in the opposite direction by means of the toothings ν and w; this causes a rotation of the angle p and the tool carrier b about the pin c and consequently a simultaneous lifting of the milling cutter α by the tool carrier b being swung around the pin r by the upper inclined surface of the thumb m. When the spindle k returns to its initial position after the milling work has been completed, the milling cutter α is also returned to its starting position under the action of the spring e .

While the movement conditions of the milling cutter around the pin r depend on the inclination of the thumb m , the swivel speed of the milling cutter around the pivot c is regulated depending on the position of the roller h in the slot u and depending on the design of those working with the roller Area of the socket i. By adjusting the roller h one can change the motion transmission ratios and thus achieve a greater or lesser rotational movement of the angle p about the pin c while the longitudinal movement of the spindle k remains the same. Depending on the inclination of the lever /, its deflection is also different if the advance of the spindle k remains the same. One can therefore cause arbitrarily delayed or accelerated rotational movements of the angle p by appropriate design of the guide surface of the sleeve i. In Figs. 3a, 3b and 3c, for example, three sleeves ill, illl, HY are illustrated, which can be used in place of the sleeve i according to Fig. Ι.

Fig. 2 shows such a coupling between the spindle k and control rod d, that the latter, in contrast to the embodiment according to Fig. Always ι in the same direction as the spindle shifted k and the angle p in anticipation of the spindle k in the opposite direction as in the embodiment is pivoted according to Fig. ι.

Sponsorship τ claims:

ι. Twist drill milling machine whose Milling spindle raised or lowered by the workpiece feed device and is also pivoted relative to the workpiece, characterized in that the workpiece feed device the swivel movement of the milling spindle is also generated.

2. Milling machine according to claim 1, characterized in that the milling spindle can be oscillated about two mutually perpendicular axes (c, r) .

3. Milling machine according to claim 2, characterized in that the area of a fixed datimens (? W ·), which swings the tool carrier (b) about the horizontal axis (r) , brings about the movement of the milling spindle required to generate the height change of the tool .

4. Milling machine according to claim 1 to 3, characterized in that a double lever (/), the roller (h) adjustable along the lever arm lays against the end face of an adjustable sleeve (i) which is formed according to the oscillating movement to be given to the tool carrier that transfers the workpiece feed movement to the tool carrier (b) .

For this purpose ι sheet of drawings.