EP0236464B1 - Riveting tool - Google Patents

Riveting tool Download PDF

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Publication number
EP0236464B1
EP0236464B1 EP86905779A EP86905779A EP0236464B1 EP 0236464 B1 EP0236464 B1 EP 0236464B1 EP 86905779 A EP86905779 A EP 86905779A EP 86905779 A EP86905779 A EP 86905779A EP 0236464 B1 EP0236464 B1 EP 0236464B1
Authority
EP
European Patent Office
Prior art keywords
tool
pressure medium
piston
pressure
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86905779A
Other languages
German (de)
French (fr)
Other versions
EP0236464A1 (en
Inventor
Manfred Schwab
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenbau Subotsch and Schwab GmbH
Original Assignee
Maschinenbau Subotsch and Schwab GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenbau Subotsch and Schwab GmbH filed Critical Maschinenbau Subotsch and Schwab GmbH
Publication of EP0236464A1 publication Critical patent/EP0236464A1/en
Application granted granted Critical
Publication of EP0236464B1 publication Critical patent/EP0236464B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0007—Tools for fixing internally screw-threaded tubular fasteners
    • B25B27/0014—Tools for fixing internally screw-threaded tubular fasteners motor-driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/105—Portable riveters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/30—Particular elements, e.g. supports; Suspension equipment specially adapted for portable riveters
    • B21J15/32—Devices for inserting or holding rivets in position with or without feeding arrangements
    • B21J15/326—Broken-off mandrel collection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53709—Overedge assembling means
    • Y10T29/53717—Annular work
    • Y10T29/53726—Annular work with second workpiece inside annular work one workpiece moved to shape the other
    • Y10T29/5373—Annular work with second workpiece inside annular work one workpiece moved to shape the other comprising driver for snap-off-mandrel fastener; e.g., Pop [TM] riveter
    • Y10T29/53739—Pneumatic- or fluid-actuated tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53709—Overedge assembling means
    • Y10T29/5377—Riveter

Definitions

  • the invention relates to a rivet setting tool for setting threaded rivet nuts or blind rivet nuts according to the preamble of claim 1.
  • a tenant for blind riveting is known from DE-A-2 154 788, in which a pressure piston and a working piston are arranged.
  • the compressed air required for the setting process is led from the lower part of the device to the device head via a pressure medium channel located outside the rivet.
  • the return of the pistons takes place in the known rivet in that a compression spring urges the working piston in the direction of the device head.
  • a disadvantage is that only a flexible channel, for example a hose, can be used as the pressure medium channel, since the pressure medium channel is firmly connected to the movable guide channel via a connecting piece, so that the hose slips as a result of a constant back and forth movement of the hose or can tear off.
  • Another disadvantage is the necessary spring.
  • the invention is therefore based on the object of making available a rivet setting tool of the type mentioned at the outset which can be produced inexpensively with little assembly effort, works with great reliability and has a high working speed.
  • a rivet setting tool which consists of a device part 100 to which a handle part 200 is molded.
  • the device part 100 has a mouthpiece 1 at its front end.
  • Clamping jaws 2 are arranged behind the mouthpiece 1 and are surrounded by a conical clamping sleeve 3.
  • a guide sleeve 4 is surrounded by a compression spring 5.
  • An intermediate piece 6 is fixed with the help of a lock nut 7.
  • the entire front section of the device part 100 is surrounded by a front sleeve 8, which is fixed in the housing 101.
  • a hydraulic piston 14 is seated in the rear part of the housing 101.
  • the hydraulic piston 14 is delimited on its rear side by a rear chamber 102, which is connected via a housing recess 103 to a device sub-channel 104 running in the device part 100.
  • the handle part 200 carries a pusher 22 which is movably attached to the handle part 200 by means of a cylindrical pin 21.
  • a lever 24 is articulated to the pusher 22 by means of a cylinder pin 23 at one end and by means of a cylinder pin 25 at its other end to a valve pin 26 which is seated on a valve rod 27.
  • the valve rod 27 is provided with a valve rod channel 201 which is provided as a central bore and which is laterally at its upper end opens outwards at 202.
  • the compressed air enters an air chamber 207 and from there into the valve rod channel 201 via an air inlet channel, which cannot be seen in the sectional view, and exits at 202.
  • the outlet 202 of the valve rod channel 201 is aligned with the transverse channel 206 of the handle part channel 205, so that the compressed air can reach the rear chamber 102 on the hydraulic or working piston 14 via the handle part channel 206 and the device part channel 104.
  • the working piston is moved to the left in FIG. 1.
  • the air flows from the device channel 104 in FIG.
  • the air flowing through the valve rod channel 201 also passes through a lower transverse channel 209 into the rear pressure chamber 210 of the pressure piston 211 and presses it downward, as seen in FIG. 1.
  • the front pressure piston chamber 212 is relieved of pressure by a ventilation channel 213.
  • the same rivet setting tool can be seen in FIG. 2, the same reference symbols referring to the same parts. However, the rivet setting tool is in a second position, in which the pusher 22 is actuated, so that the valve rod 27 is moved downward against a compression spring 38 via the lever 24.
  • the sealing ring 58 located at the lower end of the valve rod 27 is moved away from its abutment on the housing cover 59, so that the compressed air flows from the inlet chamber 207 into the front chamber 212 of the pressure piston 211, as a result of which a hydraulic medium flows through the pressure channel 120 to the working piston 14 moved to the right in the position shown in Fig. 2, whereby the riveting process is effected.
  • the pusher 22 is relieved.
  • the valve rod 27 is moved up again by the compression spring 38, as a result of which the working piston 14 and the pressure piston 211 return to their position shown in FIG. 1 by closing the vent hole 217 and the vent hole 213 be opened.
  • a check valve 43 is shown on an enlarged scale. If the rivet setting tool is placed on the housing underside 60, the plunger 61 protruding from the housing 60 is moved inwards and the ball located in the seat 62 is pressed against the opening 63 so that it closes it and the compressed air no longer enters the device can penetrate. In this way, not only is unnecessary waste of compressed air prevented, but also a constant outflow of the compressed air, as in the position according to FIG. 1 past the adjustment valve 110 into the suction chamber 106. However, it would be disadvantageous to constantly change a desired pressure setting with the help of the air adjusting screw 20, and it would also be far too complex to constantly close the rotary valve 110 via the compressed air control screw 20. In this way, the compressed air in the device is switched off practically automatically via the plunger 61.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Insertion Pins And Rivets (AREA)
  • Actuator (AREA)

Abstract

A riveting tool for driving threaded or blind nuts comprises a feed device which can be operated for the upsetting process and conferring an axial movement on the threaded or tie-bolt. This feed arrangement comprises a cylinder and piston arrangement consisting of a compression piston and an operating piston (211, 14) the operating and compression pistons (14, 211) are returned by diverting the pressurized medium through the rear part (102, 210) of the pistons, thus making return springs unnecessary. A channel for pressurized medium (201, 205, 104) extends from the point of admission (207) of the pressurized medium to the rear chamber (102) passing through the handle portion (200). The rear chamber (102) is closed off on one side of the rear part of the operating piston (14).

Description

Die Erfindung betrifft ein Nietsetzwerkzeug zum Setzen von Gewindenietmuttern oder Blindnietmuttern gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a rivet setting tool for setting threaded rivet nuts or blind rivet nuts according to the preamble of claim 1.

Aus der DE-A-2 154 788 ist ein Mieter für Blindnietung bekannt, in dem ein Druckkolben und ein Arbeitskolben angeordnet sind. Die zum Setzvorgang erforderliche Druckluft wird über einen außerhalb des Nieters angeordneten Druckmittelkanal aus dem unteren Geräteteil zum Gerätekopf geführt. Die Rückführung der Kolben erfolgt bei dem bekannten Nieter dadurch, daß eine Druckfeder den Arbeitskolben in Richtung des Gerätekopfes drängt. Als Nachteil ist zu werten, daß als Druckmittelkanal nur ein biegsamer Kanal, beispielsweise ein Schlauch, verwendet werden kann, da der Druckmittelkanal über einen Stutzen fest mit dem beweglichen Führungskanal verbunden ist, so daß als Folge einer ständigen Hin- und Herbewegung des Schlauches dieser abrutschen oder abreißen kann. Ein weiterer Nachteil ist in der erforderlichen Feder zu sehen. Abgesehen davon, daß die Federkraft erlahmen kann oder die Federn selbst schadhaft werden und dann die Rückführung der Kolben nicht einwandfrei erfolgt, sind entsprechend gute Federn sehr kostenaufwendig und verursachen auch bei der Montage einen möglichst zu vermeidenden Aufwand. Außerdem kann eine Feder nur eine bestimmte Kraft ausüben, so daß hinsichtlich der Geschwindigkeit der Rückführbewegung der Kolben Grenzen gesetzt sind.A tenant for blind riveting is known from DE-A-2 154 788, in which a pressure piston and a working piston are arranged. The compressed air required for the setting process is led from the lower part of the device to the device head via a pressure medium channel located outside the rivet. The return of the pistons takes place in the known rivet in that a compression spring urges the working piston in the direction of the device head. A disadvantage is that only a flexible channel, for example a hose, can be used as the pressure medium channel, since the pressure medium channel is firmly connected to the movable guide channel via a connecting piece, so that the hose slips as a result of a constant back and forth movement of the hose or can tear off. Another disadvantage is the necessary spring. In addition to the fact that the spring force can weaken or the springs themselves become defective and the pistons are not returned properly, correspondingly good springs are very expensive and also cause effort to be avoided during assembly. In addition, a spring can only exert a certain force, so that there are limits to the speed of the return movement of the pistons.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Nietsetzwerkzeug der eingangs genannten Art verfügbar zu machen, das mit einem geringen Montageaufwand kostengünstig hergestellt werden kann, mit großer Zuverlässigkeit arbeitet und eine hohe Arbeitsgeschwindigkeit aufweist.The invention is therefore based on the object of making available a rivet setting tool of the type mentioned at the outset which can be produced inexpensively with little assembly effort, works with great reliability and has a high working speed.

Die Aufgabe wird erfindungsgemäß durch die in Anspruch 1 angegebenen Merkmale gelöst. Vorteilhafte Weiterbildungen sind in den Unteransprüchen beschrieben.The object is achieved by the features specified in claim 1. Advantageous further developments are described in the subclaims.

Die Erfindung soll nachstehend anhand von Ausführungsbeispielen unter Bezugnahme auf die beigefügten Zeichnungen näher erläutert werden. In den Zeichnungen zeigen:

Fig. 1
ein Nietsetzwerkzeug im Schnitt, in unbetätigter Stellung;
Fig. 2
ein Nietsetzwerkzeug nach Fig. 1 in betätigter Stellung; und
Fig. 3
ein Sperrventil für ein Nietsetzwerkzeug nach den Fig. 1 oder 2.
The invention will be explained in more detail below using exemplary embodiments with reference to the accompanying drawings. The drawings show:
Fig. 1
a rivet setting tool in section, in the unactuated position;
Fig. 2
a rivet setting tool of Figure 1 in the actuated position. and
Fig. 3
a check valve for a rivet setting tool according to FIGS. 1 or 2.

In Fig. 1 ist ein Nietsetzwerkzeug dargestellt, das aus einem Geräteteil 100 besteht, an das ein Griffteil 200 angeformt ist. Das Geräteteil 100 hat an seinem vorderen Ende ein Mundstück 1. Hinter dem Mundstück 1 sind Spannbacken 2 angeordnet, die von einer konischen Spannhülse 3 umgeben sind. Eine Führungshülse 4 wird von einer Druckfeder 5 umgeben. Ein Zwischenstück 6 ist mit Hilfe einer Kontermutter 7 festgelegt. Der gesamte vordere Abschnitt des Geräteteils 100 wird von einer vorderen Hülse 8 umgeben, die in dem Gehäuse 101 festgelegt ist. In dem hinteren Teil des Gehäuses 101 sitzt ein Hydraulikkolben 14. Der Hydraulikkolben 14 wird auf seiner hinteren Seite von einer hinteren Kammer 102 begrenzt, die über eine Gehäuseausnehmung 103 mit einem im Geräteteil 100 verlaufenden Geräteteilkanal 104 in Verbindung steht. In den Geräteteilkanal 104 mündet ein im Griffteil 200 verlaufender Griffteilkanal 5 ein, der an seinem unteren Ende in einen Querkanal 206 übergeht.In Fig. 1, a rivet setting tool is shown, which consists of a device part 100 to which a handle part 200 is molded. The device part 100 has a mouthpiece 1 at its front end. Clamping jaws 2 are arranged behind the mouthpiece 1 and are surrounded by a conical clamping sleeve 3. A guide sleeve 4 is surrounded by a compression spring 5. An intermediate piece 6 is fixed with the help of a lock nut 7. The entire front section of the device part 100 is surrounded by a front sleeve 8, which is fixed in the housing 101. A hydraulic piston 14 is seated in the rear part of the housing 101. The hydraulic piston 14 is delimited on its rear side by a rear chamber 102, which is connected via a housing recess 103 to a device sub-channel 104 running in the device part 100. A partial handle channel 5, which extends in the handle part 200 and opens into a transverse channel 206 at its lower end, opens into the device partial channel 104.

Das Griffteil 200 trägt einen Drücker 22 , der mit Hilfe eines Zylinderstiftes 21 bewegbar am Griffteil 200 befestigt ist. An dem Drücker 22 ist mit Hilfe eines Zylinderstiftes 23 ein Hebel 24 an seinem einen Ende angelenkt und mit Hilfe eines Zylinderstiftes 25 an seinem anderen Ende mit einem Ventilbolzen 26 , der auf einer Ventilstange 27 sitzt. Die Ventilstange 27 ist in ihrem unteren Abschnitt mit einem als mittige Bohrung ausgestatteten Ventilstangenkanal 201 versehen, der an seinem oberen Ende seitlich bei 202 nach außen öffnet.The handle part 200 carries a pusher 22 which is movably attached to the handle part 200 by means of a cylindrical pin 21. A lever 24 is articulated to the pusher 22 by means of a cylinder pin 23 at one end and by means of a cylinder pin 25 at its other end to a valve pin 26 which is seated on a valve rod 27. In its lower section, the valve rod 27 is provided with a valve rod channel 201 which is provided as a central bore and which is laterally at its upper end opens outwards at 202.

Über einen in der Schnittdarstellung nicht zu sehenden Lufteinlaßkanal gelangt die Druckluft in eine Luftkammer 207 und von dort in den Ventilstangenkanal 201 und tritt bei 202 aus. In der in Fig. 1 dargestellten ersten Stellung fluchtet der Austritt 202 des Ventilstangenkanals 201 mit dem Querkanal 206 des Griffteilkanals 205 , so daß die Druckluft über den Griffteilkanal 206 und den Geräteteilkanal 104 in die hintere Kammer 102 am Hydraulik- oder Arbeitskolben 14 gelangen kann. Dadurch wird der Arbeitskolben in Fig. 1 nach links bewegt. Außerdem strömt die Luft von dem Gerätekanal 104 in Fig. 4 nach links zu einer Ausnehmung 105 im Griffteilgehäuse 101 in eine Ansaugkammer 106 und von dort über Bohrungen 107 in das Innere der Arbeitskolbenstange 108 und dient dort zum Ansaugen des Niets, wenn nicht - je nach Ausgestaltung des Geräts - das Aufschrauben einer Gewindenietmutter vorgesehen ist. Außerdem steht die durch die Bohrungen 107 strömende Luft zum Entfernen der Nietstifte nach hinten durch den Kanal 109 zur Verfügung. Mit Hilfe eines Ventils 110 kann die Stärke der Luftströmung und damit die durch die Luft erzeugte Kraft stufenlos eingestellt werden, indem das Ventil mit Hilfe einer Überwurfmutter 20 oder einer nicht dargestellten Stellschraube entsprechend eingestellt werden kann.The compressed air enters an air chamber 207 and from there into the valve rod channel 201 via an air inlet channel, which cannot be seen in the sectional view, and exits at 202. In the first position shown in FIG. 1, the outlet 202 of the valve rod channel 201 is aligned with the transverse channel 206 of the handle part channel 205, so that the compressed air can reach the rear chamber 102 on the hydraulic or working piston 14 via the handle part channel 206 and the device part channel 104. As a result, the working piston is moved to the left in FIG. 1. In addition, the air flows from the device channel 104 in FIG. 4 to the left to a recess 105 in the handle housing 101 in a suction chamber 106 and from there via bores 107 into the interior of the working piston rod 108 and is used there for suctioning the rivet, if not - depending on Design of the device - the screwing of a threaded rivet nut is provided. In addition, the air flowing through the bores 107 is available to remove the rivet pins through the channel 109 to the rear. With the aid of a valve 110, the strength of the air flow and thus the force generated by the air can be adjusted continuously by the valve being adjusted accordingly with the aid of a union nut 20 or an adjusting screw (not shown).

Die durch den Ventilstangenkanal 201 strömende Luft gelangt außerdem durch einen unteren Querkanal 209 in die hintere Druckkammer 210 des Druckkolbens 211 und drückt diesen, nach Fig. 1 gesehen, nach unten. Die vordere Druckkolbenkammer 212 ist entlastet durch einen Entlüftungskanal 213. In Fig. 2 ist das gleiche Nietsetzwerkzeug zu sehen, wobei sich gleiche Bezugszeichen auf gleiche Teile beziehen. Jedoch befindet sich das Nietsetzwerkzeug in einer zweiten Stellung, bei der der Drücker 22 betätigt ist, so daß über den Hebel 24 die Ventilstange 27 gegen eine Druckfeder 38 nach unten bewegt wird. Auf diese Weise wird eine Dichtung 36 vom Gehäuse 215 des Griffteils 200 wegbewegt, so daß der Griffteilkanal 205 über die Bohrung 216,in der die Ventilstange 27 sitzt, und einen Entlüftungskanal 217 entleert wird und damit auch die hintere Kammer 102 am Arbeitskolben 14 über den mit dem Griffteilkanal 205 in Verbindung stehenden Geräteteilkanal 104.The air flowing through the valve rod channel 201 also passes through a lower transverse channel 209 into the rear pressure chamber 210 of the pressure piston 211 and presses it downward, as seen in FIG. 1. The front pressure piston chamber 212 is relieved of pressure by a ventilation channel 213. The same rivet setting tool can be seen in FIG. 2, the same reference symbols referring to the same parts. However, the rivet setting tool is in a second position, in which the pusher 22 is actuated, so that the valve rod 27 is moved downward against a compression spring 38 via the lever 24. In this way, a seal 36 is removed from the housing 215 of the handle part 200 moved away so that the handle part channel 205 is emptied via the bore 216 in which the valve rod 27 is seated and a ventilation channel 217 and thus also the rear chamber 102 on the working piston 14 via the device part channel 104 connected to the handle part channel 205.

Außerdem wird der am unteren Ende der Ventilstange 27 sich befindende Dichtungsring 58 von seiner Anlage am Gehäusedeckel 59 wegbewegt, so daß die Druckluft aus der Einlaßkammer 207 in die vordere Kammer 212 des Druckkolbens 211 fließt, wodurch ein hydraulisches Medium über den Druckkanal 120 den Arbeitskolben 14 in die in Fig. 2 dargestellte Stellung nach rechts bewegt, wodurch der Nietvorgang bewirkt wird. Nach diesem Arbeitsgang wird der Drücker 22 entlastet.Durch die Druckfeder 38 wird die Ventilstange 27 wieder nach oben bewegt, wodurch der Arbeitskolben 14 sowie der Druckkolben 211 wieder in ihre in Fig. 1 dargestellte Stellung zurückkehren, indem die Entlüftungsbohrung 217 geschlossen und die Entlüftungsbohrung 213 geöffnet werden.In addition, the sealing ring 58 located at the lower end of the valve rod 27 is moved away from its abutment on the housing cover 59, so that the compressed air flows from the inlet chamber 207 into the front chamber 212 of the pressure piston 211, as a result of which a hydraulic medium flows through the pressure channel 120 to the working piston 14 moved to the right in the position shown in Fig. 2, whereby the riveting process is effected. After this operation, the pusher 22 is relieved. The valve rod 27 is moved up again by the compression spring 38, as a result of which the working piston 14 and the pressure piston 211 return to their position shown in FIG. 1 by closing the vent hole 217 and the vent hole 213 be opened.

In Fig. 3 ist in vergrößertem Maßstab ein Sperrventil 43 dargestellt. Wird das Nietsetzwerkzeug auf die Gehäuseunterseite 60 aufgesetzt, so wird der aus dem Gehäuse 60 hervorstehende Stößel 61 nach innen bewegt und dabei die in dem Sitz 62 befindliche Kugel gegen die Öffnung 63 gedrückt, so daß sie diese verschließt und die Druckluft nicht mehr in das Gerät eindringen kann. Auf diese Weise wird nicht nur eine unnötige Verschwendung von Druckluft verhindert, sondern auch ein ständiges Ausströmen der Druckluft , wie es in der Stellung nach Fig. 1 am Einstellventil 110 vorbei in die Ansaugkammer 106 ständig geschieht. Es wäre aber unvorteilhaft, eine einmal gewünschte Druckeinstellung mit Hilfe der Luftstellschraube 20 ständig zu verändern, und auch viel zu aufwendig, über die Druckluftsteuerschraube 20 das Drehventil 110 ständig zu schließen. Auf diese Art und Weise wird praktisch automatisch über den Stößel 61 die Druckluft im Gerät abgeschaltet.In Fig. 3, a check valve 43 is shown on an enlarged scale. If the rivet setting tool is placed on the housing underside 60, the plunger 61 protruding from the housing 60 is moved inwards and the ball located in the seat 62 is pressed against the opening 63 so that it closes it and the compressed air no longer enters the device can penetrate. In this way, not only is unnecessary waste of compressed air prevented, but also a constant outflow of the compressed air, as in the position according to FIG. 1 past the adjustment valve 110 into the suction chamber 106. However, it would be disadvantageous to constantly change a desired pressure setting with the help of the air adjusting screw 20, and it would also be far too complex to constantly close the rotary valve 110 via the compressed air control screw 20. In this way, the compressed air in the device is switched off practically automatically via the plunger 61.

Claims (8)

  1. A rivet setting tool for setting threaded or blind rivet nuts,

    having a feed mechanism which can be actuated for the upsetting operation and which imparts axial motion to the threaded or tensile pin, the feed mechanism having a piston-cylinder assembly comprising a pressure piston and a working piston,

    having a pressure medium inlet chamber (207) situated in the lower tool portion and

    having a pressure medium duct (201, 205, 104) for feeding pressure medium from the pressure medium inlet chamber (207) to an upper tool portion,

    characterised in that

    the pressure medium duct (201, 205, 104) runs from the pressure medium inlet chamber (207) through the handle portion (200) to a rear chamber (102) which is closed on one side by the rear of the working piston (14),

    a first portion (201) of the pressure medium duct runs through the valve rod (27) and communicates in the first position with a second portion (205) of the pressure medium duct in the handle portion (200), and the pressure medium duct (104, 201, 205) leads in a first position (Fig. 1) of the valve rod (27) by way of openings (209) into the rear pressure piston chamber (210) which is closed on one side by the rear of the pressure piston (211), so that the return of the pressure and working pistons is effected without return springs by diverting the pressure medium to the rears of the pistons.
  2. A tool as claimed in claim 1, characterised in that on actuation of the trigger (22) and in the resulting second position (Fig. 2) of the valve rod (27) a connection is made from the rear pressure chamber (104) and the pressure piston (211) to a vent opening (217).
  3. A tool as claimed in claim 1 or 2, characterised in that in the pressure medium duct (104) in the body portion (100) a valve (110) is provided which reveals a compressed air feed duct (105) in an annular space (106) behind the clamping chuck (2), so that pins torn off in the riveting process can be carried out of the tool through a discharge duct (109).
  4. A tool as claimed in claim 3, characterised in that the valve (110) is in the form of a rotary valve which allows stepless control of the force carrying the torn off rivet pins.
  5. A tool as claimed in claim 4, characterised in that the rotary valve is provided for adjustment with a cap nut (20) embracing the tool head (8).
  6. A tool as claimed in claim 4, characterised in that the rotary valve (110) carries an air adjusting screw (20).
  7. A tool as claimed in any of claims 1 to 6, characterised in that a shut-off valve (61, 62, 63) automatically interrupts the compressed air supply when the tool is in a set-down condition.
  8. A tool as claimed in claim 7, characterised in that a valve push rod (61) projects from the underside (60) of the housing surrounding the pressure piston (211).
EP86905779A 1985-09-14 1986-09-13 Riveting tool Expired - Lifetime EP0236464B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3532932 1985-09-14
DE19853532932 DE3532932A1 (en) 1985-09-14 1985-09-14 RIVETING TOOL

Publications (2)

Publication Number Publication Date
EP0236464A1 EP0236464A1 (en) 1987-09-16
EP0236464B1 true EP0236464B1 (en) 1992-12-09

Family

ID=6281044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86905779A Expired - Lifetime EP0236464B1 (en) 1985-09-14 1986-09-13 Riveting tool

Country Status (5)

Country Link
US (1) US4770023A (en)
EP (1) EP0236464B1 (en)
JP (1) JPH0777658B2 (en)
DE (2) DE3532932A1 (en)
WO (1) WO1987001630A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11673243B2 (en) 2018-09-05 2023-06-13 Milwaukee Electric Tool Corporation Blind rivet nut-setting tool

Families Citing this family (22)

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Also Published As

Publication number Publication date
WO1987001630A1 (en) 1987-03-26
US4770023A (en) 1988-09-13
DE3532932A1 (en) 1987-03-19
EP0236464A1 (en) 1987-09-16
JPH0777658B2 (en) 1995-08-23
DE3687268D1 (en) 1993-01-21
JPS63500926A (en) 1988-04-07

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