DE1192141B

DE1192141B -

Info

Publication number: DE1192141B
Application number: DENDAT1192141D
Authority: DE
Publication date: 1965-05-06

Description

C I*/1/77C I * / 1/77

A*'A * '

DEUTSCHES '/MV^ PATENTAMTGERMAN '/ MV ^ PATENT OFFICE AUSLEGESCHRIFTEDITORIAL

Deutsche Kl.: 5c-10/01 German class: 5c- 10/01

Nummer 1192141Number 1192141

Aktenzeichen: S 66031 VI a/5 cFile number: S 66031 VI a / 5 c

1 192 141 Anmeldetag: 27. November 1959 1 192 141 filing date: November 27, 1959

Auslegetag: 6. Mai 1965Opening day: May 6, 1965

Die Erfindung bezieht sich auf eine längenveränderliche, hydraulische Vorschubvorrichtung, z. B. Grubenstempel, mit zwei durch das hydraulische Mittel ineinander verschiebbaren Außen- und Innenstempelteilen, einem Entlastungsventil, einem Raubventil und einem Füllventil sowie einem innerhalb des Innenstempels vorgesehenen Kompressionsraum, der zur Rückführung des Innenstempelteils dient.The invention relates to a variable-length, hydraulic feed device, z. B. pit ram, with two by the hydraulic means in one another displaceable outer and Inner punch parts, a relief valve, a robbery valve and a filling valve as well as an inside of the inner punch provided compression space that is used to return the inner punch part serves.

Bei einem bekannten Grubenstempel dieser Art »o besteht der zur Rückführung des Innenstempelteils dienende Kompressionsraum aus zwei Teilen, von denen der eine Teil durch zwei schlauchartige Ringkammern und der andere Teil zwischen einem fliegenden Kolben und einem Verschlußteil gebildet ist. Der Kompressionsraum des bekannten Stempels, der als eine veränderliche Gasblase in einer hydraulisch beaufschlagten Flüssigkeit betrachtet werden könnte, ist in seiner Wirkungsweise ausschließlich vom Druck der hydraulischen Flüssigkeit des Sternpels abhängig, dagegen unabhängig vom Hub des Stempels. Aus diesem Grund ist der Druckverlauf während des Hubs und des Raubens völlig unbestimmt und daher nicht beherrschbar. Die ferner bekannten Teleskopstützen mit einer beim Setzen as der Stütze auseinanderziehbaren Zugfeder sind für einen praktischen Betrieb, insbesondere einen Dauerbetrieb, nicht wirklich brauchbar, insbesondere da die Zugfeder auf ein Mehrfaches ihrer Länge ausgezogen und damit in höchst störanfälligem Grad belastet werden muß.In a known pit punch of this type, there is the one for returning the inner punch part Serving compression space of two parts, one part of which by two tubular annular chambers and the other part is formed between a flying piston and a plug is. The compression space of the well-known ram, which acts as a variable gas bubble in a hydraulic acted upon liquid could be considered is in its mode of action exclusively depends on the pressure of the hydraulic fluid of the star pelvis, on the other hand independent of the stroke of the Stamp. For this reason, the pressure curve during the stroke and the robbery is completely indeterminate and therefore not controllable. The further known telescopic supports with a tension spring which can be pulled apart when the support is set are for practical operation, especially continuous operation, not really useful, especially there the mainspring is extended to a multiple of its length and thus in a highly prone to failure degree must be charged.

Nach der Erfindung werden die geschilderten Mängel einer eingangs angegebenen Vorschubvorrichtung dadurch behoben, daß in dem Zylinder des Innenstempelteils ein mit dem Außenstempelteil fest verbundener Tragkolben angeordnet und ferner der Kompressionsraum zwischen dem Tragkolben und einem Rückzugkolben vorgesehen ist, der mit dem Innenstempelteil fest verbunden ist und durch den der mit dem Außenstempelteil fest verbundene Kolben des Tragkolbens hindurchführbar ist. Dadurch wird der Vorteil erzielt, daß der zur Rückführung des Innenstempelteils dienende Kompressionsraum genau definiert ist und von der Verschiebetätigkeit der Stempelteile zueinander unmittelbar abhängig ist. Dadurch sind die Druckverhältnisse vorher genau bestimmt, so daß auch der Druckablauf beim Setzen und Rauben des Stempels genau festgelegt und beherrschbar ist. Die für den praktischen Einsatz erforderliche Betriebssicherheit ist daher gewährleistet. Durch entsprechende Dimensionierung der Kolbenstange des Tragkolbens kann Längenveränderliche, hydraulische
Vorschubvorrichtung, z. B. GrubenstempelAccording to the invention, the described shortcomings of a feed device specified at the outset are remedied in that in the cylinder of the inner ram part a support piston firmly connected to the outer ram part is arranged and furthermore the compression space is provided between the support piston and a retraction piston, which is firmly connected to the inner ram part and through through which the piston of the support piston, which is firmly connected to the outer punch part, can be passed. This has the advantage that the compression space serving to return the inner punch part is precisely defined and is directly dependent on the displacement activity of the punch parts with respect to one another. As a result, the pressure conditions are precisely determined in advance, so that the printing process when setting and stealing the stamp is precisely defined and controllable. The operational safety required for practical use is therefore guaranteed. By appropriately dimensioning the piston rod of the support piston, variable-length, hydraulic
Feed device, e.g. B. Pit punch

Anmelder:Applicant:

Salzgitter Maschinen Aktiengesellschaft,
Salzgitter-BadSalzgitter Maschinen Aktiengesellschaft,
Salzgitter bath

Als Erfinder benannt:
Max Bassner, Salzgitter-BadNamed as inventor:
Max Bassner, Salzgitter-Bad

eine verhältnismäßig große wirksame Fläche des Rückzugkolbens erreicht werden. Der Rückzugkol- , ben bewirkt außerdem eine besonders günstige Ab-' dichtung des Zylinders des Innenstempelteils nach außen hin, so daß Verschmutzungen der inneren Zylindergleitfläche sowie des Tragkolbens und auch Korrosionen dieser Flächen nicht eintreten können.a relatively large effective area of the retraction piston can be achieved. The retraction piston, ben also causes a particularly favorable sealing of the cylinder of the inner punch part outside, so that contamination of the inner cylinder sliding surface and the support piston and also Corrosion of these surfaces cannot occur.

Bei einer weiteren Ausführungsform der Erfindung besteht der Tragkolben und seine Kolbenstange aus Leichtbaustoff, z.B. Leichtmetall oder Kunststoff. Auf diese Weise wird ohne irgendeine Beeinträchtigung der Funktion des Stempels sein Gewicht recht erheblich verringert, was zur Erleichterung des manuellen Transportes des Stempels wesentlich beiträgt. In a further embodiment of the invention there is the support piston and its piston rod made of lightweight construction material, e.g. light metal or plastic. This way it will be without any impairment the function of the stamp reduces its weight quite considerably, which facilitates the manual transport of the stamp contributes significantly.

Eine weitere Verbesserung ist nach der Erfindung dadurch erzielt, daß am unteren Teil des Zylinders in an sich bekannter Weise ein ringartiger Hubbegrenzungsanschlag angeordnet ist, der in einer Ringnut des Zylinders nach innen selbstspannend sitzt. Diese Erleichterung ergibt sich daraus, daß beim Herausschieben des Zylinders nach hinten aus dem Außenrohr der Hubbegrenzungsring freigelegt und ohne weiteres herausgenommen werden kann. Umgekehrt läßt sich der Ring ebenso leicht wieder einschieben, wobei er automatisch gegen selbsttätiges Herausspringen gesichert ist.A further improvement is achieved according to the invention in that the lower part of the cylinder in a known manner, a ring-like stroke limit stop is arranged in a Ring groove of the cylinder sits self-tightening towards the inside. This relief results from the fact that When the cylinder is pushed back out of the outer tube, the stroke limiting ring is exposed and can be easily removed. The other way round, the ring can just as easily be restored slide in, whereby it is automatically secured against jumping out of its own accord.

In der Zeichnung sind zwei Ausführungsformen eines Grubenstempels als Beispiele der Erfindung dargestellt.In the drawing are two embodiments of a pit punch as examples of the invention shown.

F i g. 1 zeigt die erste Ausfuhrungsform im Längsschnitt; F i g. 1 shows the first embodiment in longitudinal section;

F i g. 2 zeigt die zweite Ausführungsform ebenfalls im Längsschnitt.F i g. 2 also shows the second embodiment in longitudinal section.

Der in F i g. 1 dargestellte Grubenstempel besteht aus einem Außenrohr 1 und einem Zylinder 2, der in dem Außenrohr verschiebbar ist.The in F i g. 1 shown pit punch consists of an outer tube 1 and a cylinder 2, which is displaceable in the outer tube.

509 568/90509 568/90

Claims

A ring 3 is attached to the inside of the outer tube 1 and serves as a stop for a stroke limiting ring 4 which is arranged in an annular groove 5 at the lower end of the cylinder 2. The stroke limiting ring 4 is designed to be self-tensioning inward. It is held in place by the outer tube 1. At the upper end of the outer tube 1, a scraper ring 6 is provided, which prevents impurities from getting from this side of the tube 1 between the tube 1 and the cylinder 2. The upper part of the cylinder is designed as a crown head 7. The crown head is provided with a push-on sleeve 8, which can be placed on a corresponding sleeve 9 of the cylinder 2 and is secured by adjusting screws. The sleeve 9 is dimensioned in terms of strength so that it serves as a break protection for the entire punch. In the upper part of the cylinder 2, a part 10 is designed as a valve housing. In it sits a cartridge 11 in which the relief valve 12 and the robbery valve 13 are housed. A support piston 14 is arranged in the cylinder 2 and is sealed on the cylinder 2 with respect to a space 15 by means of the seal 16 and with respect to the space 17 by means of a seal 18. The piston 14 is provided with a piston rod 19 which is fastened at its lower end by means of a screw 20 to the foot 21 of the punch. The foot 21, in turn, is screwed onto the outer tube 1 and is thereby firmly connected to the tube 1. On the lower part of the cylinder 2 there is a retraction piston 22 which is firmly connected to the cylinder 2 by means of a spring ring 23. On the piston rod 19, the retraction piston 22 is sealed off from the space 17 by means of a seal 24. There is no seal after the space 25, so that, if necessary, air can penetrate from the space 25 into the space 17. When setting, i.e. H. Pressing apart the ram is via a gun attachable at 26, not shown itself, via a filling valve 27 pressure medium, for. B. oil or water, supplied to the space 15. The punch pulls apart until it is firmly attached to the hanging wall. The stamp is held in this position while it is doing its supporting work. When the ram is pushed apart, the retraction piston 22 moves along the piston rod 19 towards the support piston 14. The pressure medium located in the space 17, for. B. air is compressed during this process. When the ram is stolen, the steal valve 13 is opened; the pressure medium in the space 15 can flow outwards, so that the pressure space 15 is relieved. At the same time, the compressed air in the space 17 expands, whereby the stamp is pushed together. During this pushing together, the pressure medium is pressed out of the space 15. The embodiment according to FIG. 2 is basically designed in the same way as the embodiment according to FIG. 1. The stamp according to FIG. 2 is only 180 ° compared to the embodiment according to FIG. 1 rotated. The foot according to FIG. 1 in the embodiment according to FIG. 2 transformed as a crown head, while the crown head according to F i g. 1 in the embodiment according to FIG. 2 is designed as a foot. The same parts are provided with the same reference symbols in both figures. The sleeve 9 'is in the embodiment according to FIG. 2 turned out to be longer than in the embodiment according to FIG. 1. The reason for this is that the valves 12, 13 and 27 should be at hand height so that the valves can be operated with the aid of a gun and robbery tackles. The sleeve 9 'forms exactly as in the embodiment according to FIG. 1 again the break protection for the whole stamp. The piston rod is in the embodiment according to FIG. 2 connected to the crown head 7 'by the screw 20. The distance H of the valve axis x-x from the foot 21 'is constant. The standing piston 14, the position of which relative to the outer tube 1 as in the embodiment according to FIG. 1 is invariable, in the embodiment according to FIG. 2 can be pushed out in the cylinder 2, while the retraction piston 22 is stationary together with the cylinder 2 in this case. The mode of operation of the embodiment according to FIG. 2 is the same as that of FIG. 1. The stamp according to the invention according to FIG. 2 can be designed in its foot part in such a way that it can be pivoted about an axis joint or also about a universal joint. The supply of the pressure medium to the pressure chamber 15 then expediently takes place through this joint. Patent claims:

1. Adjustable length, hydraulic feed device, z. B. pit ram with two outer and inner ram parts which can be shifted into one another by the hydraulic means, a relief valve, a space valve and a filling valve as well as a compression space provided within the inner ram which serves to return the inner ram part, characterized in that the cylinder (2 ) of the inner ram part a support piston (14 ) firmly connected to the outer ram part (1) is arranged and furthermore the compression space (17) is provided between the support piston (14) and a retraction piston (22) which is firmly connected to the inner ram part (2) and through which the piston (19) of the supporting piston (14) , which is firmly connected to the outer punch part, can be passed.

2. Apparatus according to claim 1, characterized in that the piston rod (19) of the support piston (14 ) is screwed to the foot (21) of the outer punch (1) (screw 20) .

3. Device according to claims 1 and 2, characterized in that the support piston (14) and its piston rod (19) made of lightweight construction material, for. B. light metal or plastic.

4. Device according to claims 1 to 3, characterized in that a ring-like travel limiting device (4) is arranged in a known manner, the by in an annular groove (5) of the inner plunger (2) inside the lower part of the inner plunger (2) self-tensioning sits.

5. Device according to claims 1 to 4, characterized in that the retraction piston (22) on the piston rod (19 ) is sealed only against the compression space (17) of the inner punch (2)