DE598247C

DE598247C - Broaching machine with hydraulic drive

Info

Publication number: DE598247C
Application number: DE1930598247D
Authority: DE
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-02-21
Filing date: 1930-02-21
Publication date: 1934-06-07

Description

Bei Räumnadelziehmaschinen mit hydraulischem Antrieb sind einerseits Ausführungen bekannt, bei denen ein doppelt wirkender Scheibenkolben unmittelbar an der Räumstange angebracht ist und in einem am Maschinengestell befestigten Öldruckzylinder gleitet. Bekannt sind solche Maschinen auch mit symmetrisch zur Räumnadelachse angebrachten mehreren kleinen Kolben und Zylindern, und zwar auch mit Unterbringung des Rückzugkolbens im Hauptarbeitskolben.For broaching machines with hydraulic drive, on the one hand, there are designs known, in which a double-acting disc piston directly on the clearing rod is attached and slides in an oil pressure cylinder attached to the machine frame. Such machines are also known with several small pistons and cylinders symmetrically attached to the broach axis, even with the retraction piston being accommodated in the main working piston.

Die Erfindung besteht darin, daß die Räumstange ein Zwischenstück trägt, das von der einen Seite her die Arbeitszylinder und von der anderen Seite her einen oder mehrere Rückzugzylinder bildet und seinerseits in einer Maschinengestellführung gleitet, die durch Deckel mit daran angesetzten hohlen Kolbenstangen abgeschlossen ist. Der Vorteil hierbei ist zunächst der, daß das Maschinengestell nur eine einfache zylindrische Führung mit Deckelanschlüssen enthält, so daß also dieser größte und schwierigst zu bearbeitende Teil besonders einfach wird, während die ganzen Kolbentriebe in kleineren Einzelstücken vorhanden sind, die leicht zu bearbeiten und nach Abnutzung im Betriebe leicht auswechselbar sind. Zugleich ist dabei, da das Maschinengestell und die an ihm anliegenden Deckeldichtungen nirgends durch Drucköl belastet sind, selbst bei Verwendung besonders hoher Öldrucke (für Hochleistungsmaschinen), nirgends ein Austreten von öl aus der Maschine zu befürchten, was einerseits zu Störungen am Werkstück und andererseits zu Verunreinigungen des Betriebsöles durch Späne führen würde. Endlich ergibt hierbei die Unterteilung des Arbeitsantriebes in zwei oder mehr Arbeitskolben die Möglichkeit, mit kleineren einge- schliffenen oder nur durch Labyrinth gedichteten Plungerkolben auszukommen, die auch bei Wärmedehnungen noch gute Dichtheit gegenüber hohen Öldrucken beibehalten, dabei besonders einfach herstellbar sind und leichten klemmungsfreien Lauf gewährleisten.The invention consists in that the clearing rod carries an intermediate piece, which is of the one side the working cylinder and one or more from the other side Forms retraction cylinder and in turn slides in a machine frame guide that is closed by cover with attached hollow piston rods. The advantage The first thing here is that the machine frame is only a simple cylindrical one Includes leadership with cover connections, so that this is the largest and most difficult to work with Part is particularly simple, while the whole piston drives are available in smaller individual pieces that are easy to edit and are easily exchangeable after wear and tear in the factory. At the same time it is because the machine frame and the cover seals resting on it nowhere through Pressurized oil are loaded, even when using particularly high oil pressures (for high-performance machines), There is no risk of oil leaking out of the machine, on the one hand to malfunctions on the workpiece and, on the other hand, to contamination of the operating oil through chips. Finally, the subdivision of the working drive into two or more working pistons makes it possible to use smaller ground plungers or only those sealed by a labyrinth Maintain good tightness against high oil pressures in the event of thermal expansion, while doing so are particularly easy to manufacture and ensure easy, jamming-free running.

Die Zeichnung veranschaulicht die Erfindung an einem Ausführungsbeispiel, und zwar sindThe drawing illustrates the invention using an exemplary embodiment, namely are

Abb. ι Längsschnitt einer Räummaschine mit mehreren Arbeitskolben und einem Rückzugkolben, Fig. Ι Longitudinal section of a broaching machine with several working pistons and a retraction piston,

Abb. 2 Teilquerschnitt dazu.Fig. 2 Partial cross-section.

Ein Maschinengestell 1 ist in seinem oberen Teil zu einer zylindrischen Führung 2 ausgebildet, die durch Deckel 3 und 4 an den Enden geschlossen ist und ein in ihm längsverschiebliches Zylinderzwischenstück 5 aufnimmt. In diesem Zwischenstück ist eine Räumstange 6 befestigt, die sich durch den arbeitsseitigen Deckel 4 und eine an ihm angesetzte Führungsmulde 7 hindurch erstreckt, die in einer üblichen Aufnahmevorrichtung zum Befestigen der Räumnadel- und Werkstückführungen endet. Im Zwischenstück 5 sind die Bohrungen für Arbeitskolben 8 an-A machine frame 1 is formed in its upper part into a cylindrical guide 2, which is closed by cover 3 and 4 at the ends and a longitudinally displaceable in it Cylinder adapter 5 receives. In this intermediate piece, a clearing rod 6 is attached, which is through the the working-side cover 4 and a guide trough 7 attached to it extends therethrough, those in a conventional receptacle for securing the broach and workpiece guides ends. The bores for the working piston 8 are located in the intermediate piece 5.

Claims

orderly. The pistons 8 are attached to the cover 4 and drilled hollow as well as to one Pressure oil supply channel 9 of the cover connected. In a central hole of the Intermediate piece 5, a return piston 10 is arranged, which is also drilled hollow, in the rear cover 3 attached and to a pressure oil supply housed in this 11 is connected. With this arrangement

not a single outward part comes into contact with pressure oil, so that without every stuffing box reliably prevents oil from escaping to the outside.

In the example, there is a pressure oil pump in the machine frame 1 to deliver pressurized oil a gear pump 12 with an electric drive motor 13, built in, and a gearbox 14 is used to distribute the pressure oil from the pump pressure line to the working piston and to the return piston and to drain the oil from these pistons. This gear 14 can, for example, be a cock be, and an adjusting lever of this tap is by a lifting rod with a hand lever

as in connection with a stop arm extends into a groove 18 incorporated in the clearing rod 6. The ends of this Channel or special stops that can be clamped in it at different points serve as Stops that move the control lever into its off position when each end of the stroke is reached bring, from which he then by further turning by hand in the same sense in the on position for the in the direction of Hand lever movement running stroke can be brought.

The effect is as follows. The clearing rod is located in the illustrated in Fig. 1 Start of work position, the control member 14 lets the pressure oil from the pump 12 to the ölkammera. and to the working piston 8. This causes the working stroke to the right and, at the end of this, a shutdown by turning the hand lever using the clearing rod groove 18. of the hand lever by hand to the left then results in the pressure oil supply from the pump 12 to the supply chamber 11 and to the Return piston 10, so that the return takes place in the position shown and then again '' Shutdown by automatically swiveling the hand lever back into its central position entry.

With this machine it is also possible, instead of one clearing rod, two or more to be attached for simultaneous work.

PATIiNTANSl'EUCH:

Broaching machine with hydraulic drive, with several for the working stroke small pistons are provided symmetrically to the axis of the broach, characterized in that that the working cylinder from one side and one or more retraction cylinders from the other side sit symmetrically to the broach axis in an intermediate piece (5) carried by the broach rod (6), which in a cylindrical guide (2) of the machine frame slides through the caves Piston rods (8, 10) carrying cover (3, 4) is closed.

1 sheet of drawings