DE202017006901U1 - Portable riveting tool with modular pressure cylinder - Google Patents

Abstract

Portable riveting tool (1), comprising a pressure cylinder (2), which is disposed on a side facing away from an application component (3) handling component (4) of the riveting device (1), also arranged in the pressure cylinder (2) a piston (5) movable is that due to an action of a gas pressure (P) on the piston (5) thus by the pressure cylinder (2) producible force (F) via the piston (5) to a hydraulic fluid (8) is exercisable, the hydraulic fluid (8) introduced into a at least partially in the handling component (4) arranged hydraulic channel (9) and a gas pressure (P) generating gas via a pressure port (10) in a Gaszuführleitung (11) can be introduced, wherein the gas pressure (P) on one of the handling component (4) facing away from the piston (5), characterized in that on a cylinder bottom (12) of the pressure cylinder (2) at least one supplementary pressure cylinder (13) is not detachably arranged or lösba can be arranged, wherein pressure cylinder (2) and supplementary pressure cylinder (13) are designed so that due to the gas pressure (P), which on the one piston head (6) of the piston (5) through the gas supply line (11) of the pressure cylinder (2) can be generated is, by means of the supplementary pressure cylinder (13) one, by the pressure cylinder (2) to be generated force (F) rectified additional force (FZ) on the hydraulic fluid (8) is exercisable.

Description

The invention relates to a portable riveting tool, comprising a printing cylinder, which is arranged on a side facing away from an application component of a handling component of the riveting, wherein also in the printing cylinder, a piston is movably arranged so that due to an action of a gas pressure on the piston thus by the pressure cylinder producible force via the piston to a hydraulic fluid is exercisable. In this case, the hydraulic fluid is introduced into an at least partially arranged in the handling component hydraulic channel and a gas pressure generating gas via a pressure port in a gas supply line can be introduced, the gas pressure acting on a side facing away from the handling component of the piston. Rivet connections are still widely used despite a variety of alternative connection options such as bonding and are mainly used for joining sheet metal parts.

The applications range here from the electronics industry over the plant and automotive engineering, and due to the possible by riveting lightweight construction, to aircraft.

Due to the riveted connection, in the case of a cold riveting, a positive connection of the riveted components and, in the case of a heat riveting, due to the shrinkage of the rivet, additionally a frictional connection is produced.

In the area of rivet setting systems, there are stationary rivet setting systems as well as mobile hand rivet setting systems.

In addition to known Zangennietsystemen which for the processing of z. B. full or semi-tubular riveting, Handnietsetzsysteme are designed as Dornbruch-Blindniet- or Magazinniet systems, with Magazinniet systems in contrast to Dornbruch blind riveting systems arranged partly hundreds of magazine blind rivets on a mandrel with lengths up to over a meter are. This mandrel has no predetermined breaking points and is used for riveting all arranged on the mandrel magazine blind rivets. This results in particular by significantly lower cycle times advantages in the processing of a large number of riveted joints. On the other hand, the potential for lower joining forces is disadvantageous compared to break-open rivet systems.

Recently, predominantly in the usually pistol-like configured Handnietsetzsystemen established a pneumatic-hydraulic pressure booster, in contrast to the previously customary pneumatic pressure transmission, which, inter alia, offers the advantage of a recoilless working stroke, whereby, inter alia, the surfaces of the components to be riveted in the neck region of Nietsetzsystems before mechanical damage can be protected by the riveting process.

In such a pneumatic-hydraulic pressure transmission first of all the gas pressure generated in a pneumatic cylinder via the plunger of a pneumatic piston acts on a generally oil-filled hydraulic system, by means of which the necessary forces for the respective riveting operation for pulling the mandrel of the blind rivet are generated. Here, the diameter of the pneumatic cylinder and piston is designed to be significantly larger than an input diameter of the hydraulic system in order to achieve a corresponding force transmission.

A pneumatically-hydraulic breakaway rivet system exemplifies the DE 41 18 459 A1 , Among other things, the disclosed riveting system comprises a hydropneumatic drive area and a rivet loading area, which is provided for automatically inserting mandrel break rivets arranged parallel to one another in a guide belt into the riveting system. The hydropneumatic drive range corresponds to the mode of operation already described.

For setting rivets with z. B. different diameters and / or the connection of two components with higher joining forces different high force ranges are required, which can be generated by means of the illustrated pneumatically or pneumatically-hydraulically operated pistol-like configured Handnietsetzsysteme. The different levels of force ranges are usually realized in that these hand riveting systems are equipped with pneumatic cylinders or pistons with different diameters. This has the consequence that the diameter of the pneumatic cylinder must be greater, the higher the force to be generated. However, this is disadvantageous in that at least one change of the pneumatic cylinder or even an exchange of the complete hand rivet setting system is necessary. In addition, such a Handnietsetzsystem is cumbersome due to the enlarged pneumatic cylinder and difficult to use in a limited workspace.

A different way to increase the producible by means of a pneumatic cylinder force shows the US 2,383,082 A , This describes a pneumatically operated Rivet pliers for riveting full or semi-tubular rivets, wherein in the pneumatic cylinder of the rivet pliers several Pneumatic piston are arranged on an axially movable hollow shaft. The hollow shaft has two inlet and a plurality of outlet openings, which are introduced in the radial direction in the shaft. Furthermore, the hollow shaft pierces the bottom of the pneumatic cylinder, wherein in the bottom end region of the hollow shaft frontally a compressed air connection is arranged. The supplied via this compressed air connection compressed air flows through the hollow shaft and thus the pneumatic cylinder after exposing the inlet openings of the hollow shaft in the direction of the pliers head and enters via the existing hollow shaft outlet openings in individual pressure chambers of the pneumatic cylinder, whereby an axial movement of the piston and the hollow shaft is initiated. The provision of the pneumatic piston respectively the hollow shaft via a spring introduced in the hollow shaft. By arranging several pneumatic pistons and the design of the pneumatic cylinder with several pressure chambers, an increase of the force generated by the rivet tongs can be achieved.

A similarly stored procedure is in the US 2,743,703 A shown, which discloses a pneumatic cylinder in tandem design, in particular for confirmation of a scissors tool. Here, two pistons are arranged in the pneumatic cylinder, which allow an increase in the force generated by the pneumatic cylinder. The supply of the necessary compressed air takes place here as well via a located on the tool facing away from the bottom side of the pneumatic cylinder compressed air connection.

Against this background, the invention has the object to provide a way to achieve the producible by the riveting tool of the type mentioned force without replacement of the riveting tool having printing cylinder with a pressure cylinder of higher diameter.

This object is achieved with a device according to the features of claim 1. The further embodiment of the invention can be found in the dependent claims.

According to the invention, therefore, a portable riveting tool, comprising a printing cylinder, which is arranged on a side facing away from an application component of a handling component of the riveting, provided, wherein also in the pressure cylinder, a piston is movably arranged so that due to an effect of a gas pressure on the piston thus by the pressure cylinder producible force via the piston to a hydraulic fluid is exercisable. In this case, the hydraulic fluid is introduced into an at least partially arranged in the handling component hydraulic channel and a gas pressure generating gas via a pressure port in a gas supply line can be introduced, the gas pressure acting on a side facing away from the handling component of the piston. In addition, at least one supplementary pressure cylinder is not detachably arranged or removably arranged on a cylinder bottom of the printing cylinder, pressure cylinder and supplementary pressure cylinder are designed so that due to the gas pressure, which is generated via the piston bottom of a piston opening gas supply line of the pressure cylinder, by means of the supplementary pressure cylinder one of the pressure cylinder itself generated force rectified additional force on the hydraulic fluid is exercisable.

The portable riveting tool or the power generating components of the riveting tool can or may therefore be modular in design. If the force generated by the pressure cylinder is insufficient to be able to set, for example, a rivet of a certain size, it is possible by means of this modular construction to attach at least one additional supplementary pressure cylinder to the already existing pressure cylinder, which increases the producible force.

On the other hand, there is still the possibility that pressure cylinder and supplementary pressure cylinder are not detachably connected to each other and thus present in one piece. However, this combined, non-detachable embodiment can in turn be arranged detachably on the riveting tool and thus be exchangeable. Of course, a detachable arrangement can also be provided for the printing cylinder per se.

The portable riveting tool can be pistol-like and pneumatically-hydraulic, also called hydropneumatic, operated break-break blind riveting tool or magazine riveting device pronounced.

The gas introduced into the pressure cylinder via the pressure connection and the gas supply line can first propagate in this pressure cylinder, pressure cylinders and supplementary pressure cylinders are designed such that the gas from the pressure cylinder propagates into the supplementary pressure cylinder and thus the same gas pressure prevails in both cylinders.

The gas pressure generating gas may, for. B. be air.

In a particularly practice-oriented development of the invention, the cylinder bottom of the printing cylinder has an opening in which a closure element can be arranged. About this opening, the supplementary pressure cylinder can be connected to the pressure cylinder and the gas pressure generating Pass gas over to the supplementary pressure cylinder.

If no supplementary printing cylinder is arranged on the printing cylinder, this opening can be closed by means of a closure element, for example a stopper or a screw cap, and the printing cylinder can be sealed from the environment.

In addition, it proves to be extremely profitable if, in the supplementary pressure cylinder, a piston which has a piston head and a piston rod is movably arranged in the supplementary pressure cylinder such that the piston rod of the supplementary pressure cylinder passes through the opening of the cylinder base of the pressure cylinder and is arranged in sections in the pressure cylinder is. The arrangement of a piston in the supplementary pressure cylinder, this can be configured in a simple manner so that the additional force can be generated on the hydraulic fluid by means of the piston and the gas introduced into the supplementary pressure cylinder.

In a very advantageous development, the piston of the supplementary pressure cylinder axially along a central axis of the piston has a recess which breaks at least the piston head of the piston of the supplementary pressure cylinder and extends within the piston rod at least up to a positioned in the printing cylinder portion of the piston rod, or an opening. By running in the axial direction recess or aperture, it may be possible that the gas pressure generating gas from the pressure cylinder passes into the supplementary pressure cylinder. The recess must extend at least as far through the piston rod of the piston of the supplementary pressure cylinder until the end of the recess is located in the pressure cylinder.

In addition, the piston rod of the piston of the supplementary pressure cylinder, starting from a circumference of the piston in the direction of the central axis of the piston, has at least one recess or opening which opens into or passes through the recess or opening extending axially along the central axis and in which it is positioned in the pressure cylinder Section of the piston rod is arranged so this turns out to be much more promising. Due to the additional side, d. H. orthogonal to the central axis of the piston of the supplementary pressure cylinder introduced recess or aperture, another flow path for the gas can be generated by the quasi-laterally introduced openings. This can be z. B. be possible that the gas pressure in the supplementary pressure cylinder equalizes faster to the gas pressure in the pressure cylinder.

The piston rod of the piston of the supplementary pressure cylinder may be cylindrical. Thus, the recess or opening, for example a bore, would be introduced radially into this piston rod.

Advantageously, it continues to be, if further supplementary pressure cylinder can be arranged on the supplementary pressure cylinder. The arrangement of several supplementary pressure cylinder in similar modular design as in the case of the pressure cylinder, it would be possible very simple to increase the force on the hydraulic fluid further, if this should be needed.

If a diameter of the supplementary pressure cylinder is smaller than a diameter of the pressure cylinder, then the handling of the riveting tool can be maintained, however, a sufficiently high additional force can be applied by the supplementary pressure cylinder.

In addition, promising as can be considered when the at least one supplementary pressure cylinder is non-positively and / or positively connected to the pressure cylinder of the riveting tool. Due to the non-positive and / or positive connection of pressure cylinder and supplementary pressure cylinder, these could not be separated from each other by the gas flowing into the supplementary pressure cylinder, since they are firmly connected, and further the supplementary pressure cylinder in a simple form, for example, by an operator of be separated from the printing cylinder.

A highly advantageous embodiment of the invention is that the pressure cylinder of the riveting device has a receptacle for the supplementary pressure cylinder. The receptacle may, for example, arranged on the cylinder bottom of the printing cylinder advantageously have a thread, for example an internal thread. As a result, the supplementary printing cylinder could be easily screwed to the impression cylinder. This can allow easy attachment and detachment of the supplementary pressure cylinder.

It is particularly advantageous if the additional force which can be generated by the supplementary cylinder can be influenced the gas pressure on the piston head of the piston of the supplementary cylinder results, as a result, the desired additional force can be achieved simply by changing the diameter of the supplementary pressure cylinder and thus at the same time the piston diameter of the supplementary pressure cylinder due to the pressure in cylinder and complementary pressure cylinder similar gas pressure.

An extremely promising embodiment of the invention is that upon the action of the gas pressure on the piston head of the piston of the supplementary cylinder, the piston rod of the piston of the supplementary cylinder is positively connected to the piston head of the piston of the pressure cylinder, wherein the additional force acts on this piston crown and thus on the hydraulic fluid , Due to the only frictional connection of the piston rod of the piston of the supplementary pressure cylinder, it may be possible to remove the piston and the supplementary pressure cylinder from the pressure cylinder, without a prior release of the piston of the supplementary pressure cylinder, z. B. unscrewing, to make of the piston crown of the piston of the printing cylinder.

If a seal is arranged in the opening of the cylinder bottom of the pressure cylinder between the cylinder bottom and piston rod of the piston of the supplementary pressure cylinder, this is to be considered as promising, as this gas-pressure generating gas can not pass through the opening of the cylinder bottom of the printing cylinder, causing an action of the gas pressure can prevent the top of the piston of the supplementary pressure cylinder.

In a further advantageous embodiment, the riveting device has a shut-off device, by means of which the generation of the additional force by the supplementary pressure cylinder can be prevented and thus virtually a shutdown of the supplementary pressure cylinder is made possible.

One way to realize such a shutdown device, inter alia, would be to connect the separated by the piston head of the piston pressure chambers of the supplementary pressure cylinder via a lockable pressure line, so as to be able to pressurize both pressure chambers with the same gas pressure, if necessary. Since there is thus no pressure difference between the pressure chambers, no additional force is generated.

If, in addition, the riveting tool is designed such that the supplementary pressure cylinder, in particular the piston of the supplementary pressure cylinder, has a pressure valve, in particular a pressure-adjusting valve, then it can be made possible for the additional force, which can be generated by the supplementary pressure cylinder, to be present only at a predetermined gas pressure. It is conceivable here that the pressure-adjusting valve is disposed within the piston rod of the piston of the supplementary pressure cylinder and controls the gas flow between the pressure cylinder and supplementary pressure cylinder according to the pressure.

As a pressure switch valve in this sense, a pressure valve is considered, which shuts off a line until the set at this pressure valve pressure is reached. When the set pressure is reached, the pressure valve opens and the gas flows unhindered through the pressure valve.

• 1 eine Seitenansicht des tragbaren Nietgerätes;
• 2 eine Schnittdarstellung des Druckzylinders mit angeordnetem Ergänzungsdruckzylinder.
• 1 zeigt eine erfindungsgemäße Weiterbildung des tragbaren Nietgerätes 1. Dieses weist einen Druckzylinder 2 auf, welcher an der der Applikationskomponente 3 abgewandten Seite der Handhabungskomponente 4 des Nietgerätes 1 angeordnet ist. Zudem weist der Druckzylinder 2 einen beweglich angeordneten Kolben 5 und dieser Kolben 5 einen Kolbenboden 6 sowie eine an diesem Kolbenboden 6 angeordnete Kolbenstange 7 auf. Die Kolbenstange 7 des Kolbens 5 ist dabei so angeordnet, dass mittels dieser Kolbenstange 7 die durch den Druckzylinder 2 aufgrund einer Einwirkung des Gasdruckes P auf den Kolbenboden 6 des Kolbens 5 erzeugte Kraft F auf die Hydraulikflüssigkeit 8 ausgeübt wird, wobei die Hydraulikflüssigkeit 8 in den abschnittsweise in der Handhabungskomponente 4 angeordneten Hydraulikkanal 9 eingebracht ist. Überdies ist ein den Gasdruck P erzeugendes Gas über den auf der der Handhabungskomponente 4 zugewandten Seite des Kolbenbodens 6 angeordneten, Druckanschluss 10 in die Gaszuführleitung 11 eingeleitet. Die Gaszuführleitung 11 durchbricht den Kolbenboden 6 und der Gasdruck P wirkt auf der der Handhabungskomponente 4 abgewandten Seite des Kolbenbodens 6 auf den Kolben 5 ein. An dem Zylinderboden 12 des Druckzylinders 2 ist in dieser Ausführungsform der Ergänzungsdruckzylinder 13 lösbar angeordnet. Der Druckzylinder 2 und der Ergänzungsdruckzylinder 13 sind dabei so ausgestaltet, dass aufgrund des über die Gaszuführleitung 11 des Druckzylinders 2 erzeugten Gasdruckes P mittels des Ergänzungsdruckzylinders 13 die der durch den Druckzylinder 2 an sich erzeugten Kraft F gleichgerichtete Zusatzkraft FZ auf die Hydraulikflüssigkeit 8 ausgeübt wird.

The invention allows for various embodiments. To further clarify its basic principle, one of them is shown in the drawing and will be described below. This shows in

• 1 a side view of the portable riveting tool;
• 2 a sectional view of the pressure cylinder with arranged supplementary pressure cylinder.
• 1 shows a further development of the portable riveting device according to the invention 1 , This has a printing cylinder 2 on, which at the application component 3 opposite side of the handling component 4 of the riveting tool 1 is arranged. In addition, the impression cylinder has 2 a movably arranged piston 5 and this piston 5 a piston bottom 6 and one on this piston crown 6 arranged piston rod 7 on. The piston rod 7 of the piston 5 is arranged so that by means of this piston rod 7 through the impression cylinder 2 due to an effect of the gas pressure P on the piston crown 6 of the piston 5 generated force F on the hydraulic fluid 8th is exercised, wherein the hydraulic fluid 8th in the sections in the handling component 4 arranged hydraulic channel 9 is introduced. Moreover, one is the gas pressure P generating gas over the on the handling component 4 facing side of the piston crown 6 arranged, pressure connection 10 in the gas supply line 11 initiated. The gas supply line 11 breaks through the piston crown 6 and the gas pressure P acts on the handling component 4 opposite side of the piston crown 6 on the piston 5 one. At the cylinder bottom 12 of the printing cylinder 2 is the supplementary pressure cylinder in this embodiment 13 detachably arranged. The printing cylinder 2 and the supplementary pressure cylinder 13 are designed so that due to the on the Gaszuführleitung 11 of the printing cylinder 2 generated gas pressure P by means of the supplementary pressure cylinder 13 the one through the impression cylinder 2 in itself generated force F rectified additional power FZ on the hydraulic fluid 8th is exercised.

2 shows the impression cylinder 2 , which in turn is the movably arranged piston 5 and this piston 5 the piston bottom 6 as well as at this piston crown 6 arranged piston rod 7 having. The piston rod 7 is arranged so that by means of this piston rod 7 due to the effect of the gas pressure P on the piston crown 6 of the piston 5 producible force F on the hydraulic fluid 8th is exercised. The hydraulic fluid 8th is here in the hydraulic channel 9 brought in. The gas pressure P is by means of a gas supply line 11 introduced gas, wherein the gas supply 11 the piston bottom 6 breaks through and thereby the gas pressure P on the underside of the piston crown 6 acts.

In this further development the 2 is on the cylinder bottom 12 of the printing cylinder 2 the supplementary pressure cylinder 13 detachably arranged, the diameter 22 of the supplementary pressure cylinder 13 less than the diameter 23 of the printing cylinder 2 , Moreover, the impression cylinder points 2 a recording 24 for the supplementary pressure cylinder 13 on, over which the supplementary pressure cylinder 13 non-positively and positively by means of a screw connection with the impression cylinder 2 connected is.

In the supplementary printing cylinder 13 is the piston 15 , which the piston bottom 16 as well as the piston rod 17 has, movably arranged. The piston rod 17 occurs through the opening 14 of the cylinder bottom 12 of the printing cylinder 2 through and is thus partially in the printing cylinder 2 arranged. Furthermore, by the separation through the piston crown 16 present pressure chambers 26 . 27 shown, which are not connected in this embodiment, however, via a lockable pressure line.

The piston 15 of the supplementary pressure cylinder 13 also points axially along the central axis 18 of the piston 15 the recess 19 or opening and the piston rod 17 of the piston 15 starting from the scope 20 of the piston 15 in the direction of the central axis 18 of the piston 15 the opening 21 on which the axially along the central axis 18 extending recess 19 or passage passes through. The opening 21 Here is in the in the printing cylinder 2 positioned portion of the piston rod 17 arranged. Furthermore, the cylinder bottom 12 of the printing cylinder 2 the opening 14 on, in which the seal 25 between cylinder bottom 12 and piston rod 17 of the piston 15 of the supplementary pressure cylinder 13 is arranged.

The printing cylinder 2 and the supplementary pressure cylinder 13 are thus designed so that due to the over the Gaszuführleitung 11 of the printing cylinder 2 generated gas pressure P by means of the supplementary pressure cylinder 13 the one through the impression cylinder 2 in itself producible force F rectified additional power FZ on the hydraulic fluid 8th is exercised. The additional force FZ results from the action of the gas pressure P on the piston crown 16 of the piston 15 of the supplementary cylinder 13 ,

When exposed to the gas pressure P on the piston crown 16 of the piston 15 of the supplementary cylinder 13 is the piston rod 17 of the piston 15 of the supplementary cylinder 13 with the piston bottom 6 of the piston 5 of the printing cylinder 2 positively connected, with the additional force FZ on the piston crown 6 and thus on the hydraulic fluid 8th acts.

LIST OF REFERENCE NUMBERS

1

riveter

2

pressure cylinder

3

application component

4

handling component

5

piston

6

piston crown

7

piston rod

8th

hydraulic fluid

9

hydraulic channel

10

pressure connection

11

gas supply

12

cylinder base

13

Supplementary pressure cylinder

14

opening

15

piston

16

piston crown

17

piston rod

18

central axis

19

recess

20

scope

21

perforation

22

diameter

23

diameter

24

admission

25

poetry

26, 27

pressure chamber

P

gas pressure

FZ

additional force

F

force

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4118459 A1 [0008]
• US 2383082A [0010]
• US 2743703 A [0011]

Claims (14)

Portable riveting tool (1), comprising a pressure cylinder (2), which is disposed on a side facing away from an application component (3) handling component (4) of the riveting device (1), also arranged in the pressure cylinder (2) a piston (5) movable is that due to an action of a gas pressure (P) on the piston (5) thus by the pressure cylinder (2) producible force (F) via the piston (5) to a hydraulic fluid (8) is exercisable, the hydraulic fluid (8) introduced into a at least partially in the handling component (4) arranged hydraulic channel (9) and a gas pressure (P) generating gas via a pressure port (10) in a Gaszuführleitung (11) can be introduced, wherein the gas pressure (P) on one of the handling component (4) facing away from the piston (5), characterized in that on a cylinder bottom (12) of the pressure cylinder (2) at least one supplementary pressure cylinder (13) is not detachably arranged or lösb ar is arrangable, wherein pressure cylinder (2) and supplementary pressure cylinder (13) are designed so that due to the gas pressure (P), which on the one piston head (6) of the piston (5) through the gas supply line (11) of the pressure cylinder (2) generated is, by means of the supplementary pressure cylinder (13) one, by the pressure cylinder (2) to be generated force (F) rectified additional force (FZ) on the hydraulic fluid (8) is exercisable. Riveting tool (1) to Claim 1 , characterized in that the cylinder bottom (12) of the printing cylinder (2) has an opening (14) in which a closure element can be arranged. Riveter (1) after the Claims 1 or 2 , characterized in that in the supplementary pressure cylinder (13), a piston (15) having a piston head (16) and a piston rod (17) is movably arranged in the supplementary pressure cylinder (13), that the piston rod (17) through the Opening (14) of the cylinder bottom (12) of the printing cylinder (2) passes and is arranged in sections in the printing cylinder (2). Riveting device (1) according to at least one of the preceding claims, characterized in that the piston (15) of the supplementary pressure cylinder (13) axially along a central axis (18) of the piston (15) has a recess (19) which at least the piston head (16). the piston (15) of the supplementary pressure cylinder (13) breaks through and extends within the piston rod (17) at least to a section of the piston rod (17) positioned in the pressure cylinder (2), or has an opening (21). Riveting device (1) according to at least one of the preceding claims, characterized in that the piston rod (17) of the piston (15) of the supplementary pressure cylinder (13) starting from a circumference (20) of the piston (15) in the direction of the central axis (18) of the Piston (15) has at least one recess or opening (21), which in the axially along the central axis (18) extending recess (19) or opening opens or passes through and in the in the pressure cylinder (2) positioned portion of the piston rod (17 ) is arranged. Riveting device (1) according to at least one of the preceding claims, characterized in that additional supplementary pressure cylinders (13) can be arranged on the supplementary pressure cylinder (13). Riveting device (1) according to at least one of the preceding claims, characterized in that a diameter (22) of the supplementary pressure cylinder (13) is smaller than a diameter (23) of the pressure cylinder (2). Riveting device (1) according to at least one of the preceding claims, characterized in that the at least one supplementary pressure cylinder (13) non-positively and / or positively or materially connected to the pressure cylinder (2) of the riveting device (1). Riveting device (1) according to at least one of the preceding claims, characterized in that the pressure cylinder (2) of the riveting device (1) has a receptacle (24) for the supplementary pressure cylinder (13). Riveting device (1) according to at least one of the preceding claims, characterized in that the additional force (FZ) which can be generated by the supplementary cylinder (13) is influenced by the action of the gas pressure (P) on the piston head (16) of the piston (15) of the supplementary cylinder (13 ) results. Riveting device (1) according to at least one of the preceding claims, characterized in that upon the action of the gas pressure (P) on the piston head (16) of the piston (15) of the supplementary cylinder (13), the piston rod (17) of the piston (15) of the supplementary cylinder (13) is non-positively connected to the piston head (6) of the piston (5) of the pressure cylinder (2), wherein the additional force (FZ) acts on this piston head (6) and thus on the hydraulic fluid (8). Riveting device (1) according to at least one of the preceding claims, characterized in that in the opening (14) of the cylinder bottom (12) of the pressure cylinder (2) between the cylinder bottom (12) and the piston rod (17) of the piston (15) Complementary pressure cylinder (13) a seal (25) is arranged. Riveting device (1) according to at least one of the preceding claims, characterized in that the riveting device (1) has a shut-off device, by means of which the generation of the additional force (FZ) by the supplementary pressure cylinder (13) can be prevented. Riveting device (1) according to at least one of the preceding claims, characterized in that the supplementary pressure cylinder (13), in particular the piston (15) of the supplementary pressure cylinder (13) has a pressure valve, in particular a pressure switching valve.

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