DE63768C

DE63768C - Machine for filing saw blades

Info

Publication number: DE63768C
Application number: DENDAT63768D
Authority: DE
Original assignee: Berlin-Leipziger Maschinenfabrik louis goebel & CO. in Berlin O., Alexanderstrafse 14b
Anticipated expiration: 1911-11-19

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

in BERLIN.in Berlin.

Auf beiliegender Zeichnung zeigtShows on the accompanying drawing

Fig. i_: die neue Maschine in der Ansicht,Fig. I _: the new machine in the view,

Fig. 2 und 3 verdeutlichen die Wirkungsweise der Maschine, und2 and 3 illustrate the operation of the machine, and

Fig. 4 zeigt die obere Ansicht derselben, theilweise im Schnitt.Fig. 4 shows the top view of the same, partly in section.

Die Antriebswelle α der Maschine (Fig. 1) wird durch eine Kurbel oder durch eine Riemscheibe (Fig. 4) in Umlauf versetzt. Auf der Welle α ist die Hubscheibe b befestigt, welche mit dem Drehzapfen c, Fig. 1, ausgestattet ist, der in einem Gleitstück c¹ ruht, das in der Coulisse d seine geradlinige Führung besitzt. Diese Coulisse d ist mit ihrem unteren Ende in dem Punkt e mit der Fufsplatte A der Maschine gelenkig verbunden und trägt an ihrem oberen Ende die Lenkerstange 2, an welcher der Feilenhalter g befestigt ist. Der Feilenhalter trägt, wie dies sein Name sagt, die Feile F und führt sich auf dem horizontalen Arme des Hebels f, Fig. 1.The drive shaft α of the machine (Fig. 1) is set in rotation by a crank or by a pulley (Fig. 4). On the shaft α , the lifting disc b is attached, which is equipped with the pivot c, Fig. 1, which rests in a slider c ¹ , which has its straight guide in the coulisse d. This coulisse d is articulated with its lower end at point e to the footplate A of the machine and carries at its upper end the handlebar 2 to which the file holder g is attached. As its name suggests, the file holder carries the file F and is guided on the horizontal arm of the lever f, Fig. 1.

Dieser Hebel f hat seinen Drehpunkt in dem auf der Fufsplatte der Maschine befestigten Ständer h und greift mit dem der Feile abgekehrten und entsprechend gebogenen Ende unter die Hubscheibe b, welche, wie dies Fig. ι zeigt, so profilirt ist, dafs der horizontale Arm des Hebels f während des einen Theiles der Umdrehung der Scheibe b horizontal liegt, während der anderen halben Umdrehung dagegen hochgehoben bleibt.This lever f has its fulcrum in the stand h attached to the footplate of the machine and, with the end facing away from the file and correspondingly curved, engages under the lifting disk b, which, as FIG. 1 shows, is profiled so that the horizontal arm of the Lever f is horizontal during one part of the revolution of the disk b , while the other half revolution remains raised.

Die auf die Lenkerstange i wirkende Feder k drückt den Hebel f. mit seinem gekrümmten Arm beständig gegen den Umfang der Hubscheibe b. Soll mit der Maschine gearbeitet werden, so wird Welle a in Rotation versetzt, so dafs sich die Hubscheibe b dreht.The spring k acting on the handlebar rod i presses the lever f with its curved arm constantly against the circumference of the lifting disc b. If the machine is to be used, shaft a is set in rotation so that lifting disc b rotates.

Erfolgt nun die Drehung in der Pfeilrichtung (Fig. 2) und bewegt sich der Kurbelzapfen, dessen Bewegungsbahn durch den seinen. Mittelpunkt durchschneidenden Kreis verdeutlicht ist, von ι über 2 nach 3, so schwingt die Coulisse d von links nach rechts. Hierdurch wird auch die Lenkerstange i von links nach rechts bewegt, so dafs die in dem Arbeithalter g eingespannte Feile F einen langsamen Feilstrich ausführt. Bei der Weiterdrehung der Hubscheibe b bewegt sich der Zapfen c von 3 über 4 wieder zurück nach 1, die Coulisse d schwingt nun also von rechts nach links; da aber gleichzeitig die Hubscheibe b, Fig. ι, den gekrümmten Arm des Hebels f niederdrückt, den Feilenhalter g mit der Feile F also angehoben hat, so erfolgt der Rücklauf der Feile, ohne dafs dieselbe das Sägeblatt berühren kann.If the rotation now takes place in the direction of the arrow (Fig. 2) and the crank pin moves, its trajectory through his. Center intersecting circle is illustrated, from ι over 2 to 3, so the coulisse d swings from left to right. As a result, the handlebar i is also moved from left to right, so that the file F clamped in the work holder g makes a slow file line. As the cam disc b continues to rotate, the pin c moves from 3 through 4 back to 1, so the coulisse d now swings from right to left; but since at the same time the lifting disc b, Fig. 1, depresses the curved arm of the lever f , thus lifting the file holder g with the file F , the file returns without its being able to touch the saw blade.

Dieser Rücklauf erfolgt bedeutend schneller als der Arbeitsgang, denn, wie Fig. 2 zeigt, ist der Weg, den der Zapfen c in der Kreisbahn von ι über 2 bis 3 zurücklegt, bedeutend gröfser als .der Kreisbogen von 3 über 4 nach ι, und da die Drehgeschwindigkeit der Scheibe b immer dieselbe bleibt, so wird der kürzere Weg von 3 über 4 nach 1 naturgemäfs in weniger Zeit zurückgelegt, als der weitere Weg von 1 über 2 nach 3, oder mit anderen Worten, die Feile F wird bei der Rückwärtsbewegung der Coulisse d schnell zurückgezogen, um dann wieder langsam vorwärts bewegt zu werden. Bei der Vorwärts-This return takes place significantly faster than the work step, because, as FIG. 2 shows, the path that the pin c covers in the circular path from ι through 2 to 3 is significantly greater than .der arc from 3 through 4 to ι, and Since the speed of rotation of the disk b always remains the same, the shorter path from 3 via 4 to 1 is naturally covered in less time than the further path from 1 via 2 to 3, or in other words, the file F is moved backwards the coulisse d is withdrawn quickly and then slowly moved forward again. In the forward

Claims

movement, the lifting disc has turned the lower part of the curved arm of the lever f , so that the file holder, under the action of the spring k, takes up the horizontal position again, slides along the lever f and cuts the file into the saw blade.

The saw blade is of course set under the file F so that it can cut into the blade as it moves forward. With the end of the advance of the file F , the saw blade has now been transported one tooth width further.

This continuation of the saw blade is effected automatically and also by the oscillating coulisse d. For this purpose, a stop or bracket q, FIG. 4, is attached to the coulisse d and a lever / is arranged in front of the same (FIGS. 2 and 4), which can swing horizontally about its pivot m. In the lever / the adjusting screws rs are provided, which are set in such a way that the bracket q hits the screw r once and then again against the screw s when the coulisse d moves back and forth, thereby pushing the lever / in the horizontal direction - and moved.

In the end of the lever / which contains the pawl η , the holder 0 is rotatably attached with its pin (Fig. 2 dotted).

The spring p attached to the lever / acts constantly against the pawl η , so that the pawl η is constantly pressed down, is firmly inserted into the toothing of the saw blade and thus holds it immovably while a tooth is being machined.

Shortly before the end of the return of the machine, i.e. shortly before the oscillation of the coulisse d from right to left ends, the bracket q hits the screw r in the lever /, the end of this lever carrying the pawl η is thereby moved towards the file , and since the pawl is pressed firmly into the teeth of the saw blade by the spring ρ, the saw blade is pushed further.

The further the screw τ protrudes from the lever /, the greater this feed rate, and since the screw can be screwed more or less through the lever I as required, the feed rate of the saw blade can be adjusted precisely according to the tooth width of each saw blade .

If the operation now begins, the bracket q passes by the screw r without touching it, so the movement of the saw blade has stopped and the file, which has lowered itself onto the blade in the manner described above and continues its working movement, is sharpening the relevant tooth of the leaf. Shortly before the end of the advance of the file, it is raised again by the action of the lifting disc b on the lever / ·, the bracket q strikes the screw s and the lever Z is now moved in the opposite direction as before. The locking tooth η here slides back on the saw blade by one tooth, since its holding device 0 rotates in the lever / while lifting the spring ρ , and engages in the saw blade again when the spring ρ is depressed. Now the reverse movement of the coulisse d begins, with the lever / and thus the saw blade maintaining their position until the bracket q hits the screw r again and thereby moves the lever with its end bearing the pawl ο against the file F and thereby the Push the saw blade forward by one tooth again, so that the file sharpens a new tooth when the operation starts again.

The saw blade is guided in any suitable way by, for example, as shown in Fig. 1, rests on a roller r and on its upper one, the teeth containing part held between an adjustable clamping device under slight pressure will.

Pat ε nt-An Proverbs:

ι. A machine for filing band saw blades, which is characterized in that the file (F) is moved back and forth by a coulisse (d) which is engaged in the coulisse by a lifting disc (b) with a sliding pin (c) , is set into oscillation in such a way that it is caused by the. different positions that the sliding pin assumes in this coulisse, a slow operation and a fast return.

2. In the machine marked under 1. the actuation of the transport device for the saw blade by a stop or bracket (q) arranged on the coulisse (d ), which alternates against one of two adjusting screws when the coulisse (d) swings back and forth (rs) , which are arranged on a lever (I) that actuates the feed device (0 n) and into the oscillation path of the stop or bracket (q).

1 sheet of drawings.