EP0572607B1 - Device for inserting and setting self-drilling blind tension rivets - Google Patents

Device for inserting and setting self-drilling blind tension rivets Download PDF

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Publication number
EP0572607B1
EP0572607B1 EP93900031A EP93900031A EP0572607B1 EP 0572607 B1 EP0572607 B1 EP 0572607B1 EP 93900031 A EP93900031 A EP 93900031A EP 93900031 A EP93900031 A EP 93900031A EP 0572607 B1 EP0572607 B1 EP 0572607B1
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EP
European Patent Office
Prior art keywords
mounting member
housing
clamping jaws
clamping jaw
clamping
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
EP93900031A
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German (de)
French (fr)
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EP0572607A4 (en
EP0572607A1 (en
Inventor
Daniel Gasser
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SFS Industrie Holding AG
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SFS Industrie Holding AG
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Publication date
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Publication of EP0572607A4 publication Critical patent/EP0572607A4/en
Publication of EP0572607A1 publication Critical patent/EP0572607A1/en
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Publication of EP0572607B1 publication Critical patent/EP0572607B1/en
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    • 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
    • B21J15/02—Riveting procedures
    • B21J15/04—Riveting hollow rivets mechanically
    • B21J15/048—Setting self-drilling hollow rivets
    • 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
    • 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
    • Y10T29/53752—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 having rotary drive mechanism

Definitions

  • the invention relates to a device for screwing in and setting self-drilling blind rivets with at least one clamping jaw that holds an inserted pulling mandrel in a positive and / or non-positive manner.
  • Such a device is known for example from EP-A-0 213 101 or FR-A-2 253 583.
  • a receiving part which has a frustoconical recess at its front end, two clamping jaws are arranged diametrically opposite one another. These clamping jaws also have a conical section-shaped surface on their outer boundary, so that an inserted mandrel can be gripped and held by axially pressing the clamping jaws into the receiving part.
  • there are problems for a proper rotational driving since a partial and not necessarily uniform angular displacement of the two clamping jaws can take place as a result of the torque that occurs.
  • the invention has therefore set itself the task of creating a device of the type mentioned, in which there is an exact positional securing of the clamping jaws and with which an optimal transmission of the necessary torque to the mandrel of a blind rivet to be screwed in and set is possible.
  • the clamping jaw (s) be plate-shaped and be or are guided in a receiving part in a groove (s) open radially towards its central axis, the groove base and the associated boundary surface of a clamping jaw being at the same acute angle to the central axis of the Recording part and taper towards the free end thereof, and that the receiving part is held axially displaceably in a housing which can be secured against rotation at least during the setting process.
  • the clamping jaws are optimally secured in the direction of rotation, since they are supported on both sides on guide surfaces, that is to say on the lateral boundary surfaces of a radially extending groove. Therefore, it is always guaranteed that the clamping jaws act specifically in the direction of the central axis of the receiving part. It is therefore always an optimal turning entrainment of an inserted mandrel of a blind blind rivet and there are no problems for the force absorption in the direction of rotation.
  • the manufacture of the clamping jaws is very simple due to the platelet-shaped design, with precise machining by punching and milling processes being possible. There is therefore also a substantially larger selection of materials, with which it can be avoided that individual sections of the clamping jaws have a brittle material structure, which can occur, in particular, during manufacture by means of a pressing process.
  • both the receiving part and the clamping jaw (s) in the housing are assigned a displacement limitation, the displacement path of the receiving part towards the free end of the housing being longer than the displacement path of the clamping jaw (s) in this direction. It is therefore a simple way to trigger the clamping jaws pressed in the radial direction. The clamping jaws are released only by an axial further movement of the receiving part, so that the section of the mandrel which is still held in place is released after the blind blind rivet has been set.
  • the clamping jaw (s) has or have a radially outwardly projecting tab at its rear end and this tab engages in a longitudinal slot in the housing, the end of the longitudinal slot facing the free end of the housing as Limitation of displacement for the tab of the clamping jaw (s) is carried out.
  • This tab which projects freely on the clamping jaws, therefore forms a simple design in order to limit the displacement of the clamping jaws.
  • this tab represents a further possibility of connecting the receiving part and the housing to one another as seen in the direction of rotation. It is also of particular advantage that this tab, but also by the special mounting of the clamping jaws in the grooves of the receiving part, makes it easy to replace the clamping jaws.
  • the jaws can be pulled out of the device without removing the entire device by grasping the tab. It is therefore possible in a simple manner to remove and reinsert the clamping jaws via the longitudinal slot provided in the housing.
  • two diametrically opposite grooves are provided in the receiving part and correspondingly two clamping jaws. It has already been shown in experiments that two alone are diametrically opposed to one another opposing clamping jaws of the type according to the invention are sufficient to ensure proper rotational driving and proper gripping of the pulling mandrel during the setting process.
  • the boundary surface of the clamping jaw (s) facing the central axis of the receiving part runs parallel to the latter.
  • the limiting surface of the clamping jaw (s) facing the central axis of the receiving part has a surface corresponding to the surface design of a tension mandrel to be used.
  • the boundary surface of the clamping jaw (s) facing the central axis of the receiving part is provided with transverse ribs, depressions, knobs or knurling.
  • the receiving part is already held against rotation in the housing by the projecting tab of the clamping jaws, it is advantageous if further measures contribute to this. It is therefore provided that the receiving part engages with longitudinally projecting bolts in the longitudinal slots of the housing. This is probably an axial displacement between the receiving part and the housing, but at the same time also ensures a backup in the direction of rotation.
  • a special constructive design of such an embodiment provides that the projecting bolts penetrate longitudinal slots on the housing and on the tubular part formed over part of its length and start from a supporting part which is axially displaceable in the center of the receiving part.
  • the bolts therefore engage both in the longitudinal slots of the housing and in the receiving part and lock these two parts in the direction of rotation.
  • the supporting part is designed to be spring-loaded in the direction of the clamping jaws and on which the area of the clamping jaws projecting beyond the grooves in the axial direction is supported.
  • the clamping jaws can therefore be designed to be constantly spring-loaded in the clamping direction in a simple manner, this spring force in no way preventing the insertion of the pulling mandrel into the device. This measure ensures that the clamping jaws are always held in their corresponding position in the receiving part and thus also in a captive manner.
  • this supporting part only has to be raised by gripping the radially projecting bolts against the force of the spring, so that the clamping jaws are exposed. The jaws can then be gripped and removed on their projecting tab.
  • the support part can also take on further functions, namely when the spring-loaded pin is guided in the support body and is designed to be spring-loaded separately from it. It is therefore possible in a simple construction to properly hold the pin which engages between the clamping jaws and causes the ejection of the separated pulling mandrel and is designed to be spring-loaded.
  • the entire construction of the device is very simple and can also be coupled to a drive in a simple manner. It is therefore advantageously provided that a shaft which can be coupled to a drive or a pulling device is inserted at the end of the receiving part which faces away from the free end.
  • the grooves open towards the central axis of the receiving part open into a central, axially identical bore.
  • two operations are then required with such a design, namely on the one hand the production of the bore and on the other hand the production of the grooves in one milling process.
  • the special design of the clamping jaws and the grooves provided to guide them have made it possible to produce the holders for the clamping jaws to be used in one operation.
  • two mutually opposite grooves in the receiving part merge directly into one another and thus form a single, wedge-shaped recess which is symmetrical to the central axis of the receiving part.
  • Such a groove can be produced in a simple manner by a milling tool, and it is therefore also ensured that the mandrel cannot engage laterally next to the mutually facing boundary surfaces of the clamping jaws. The mandrel is therefore always inserted between the facing boundary surfaces of the clamping jaws, which also extend across the entire width of the groove.
  • the groove base and the associated delimiting surface of the clamping jaw have an arcuate cross section.
  • Such an embodiment is only possible if grooves are formed, since the arc shape or the radius of the boundary surfaces is constant over the entire length of the groove base or over the entire length of the associated boundary surface of the clamping jaw.
  • the end cap provided at the free end of the housing has a through opening for inserting a pulling mandrel, radially spring-loaded holding means being provided in the region of the through opening. This additional measure ensures that a pull-blind rivet inserted into the device is also held captively in the device until the drilling process or until the setting process.
  • the device 1 for screwing in and setting self-drilling blind rivets 2 consists essentially of clamping jaws 3, a receiving part 4 and a housing 5.
  • the clamping jaws 3 are plate-shaped and are guided in the receiving part 4 in grooves 7 which are open radially towards its central axis 6.
  • the groove base 8 and the associated boundary surface 9 of a clamping jaw 3 run at the same acute angle to the central axis 6 and taper towards the free end thereof.
  • a displacement limit is provided in the housing 5 both for the receiving part 4 and for the clamping jaws 3, the displacement path of the receiving part 4 in the direction of the free end of the housing 5 being longer than the displacement path the jaws 3 in this direction.
  • An end cap 10 is provided at the free end of the housing 5 as a displacement limitation for the receiving part 4.
  • the inner surface 11 of this end cap 10 forms a stop as a displacement limitation for the receiving part 4 in the direction of the free end of the housing 5.
  • the jaws 3 have at their rear end a radially outwardly projecting tab 12 which engages in a longitudinal slot 13 in the housing 5.
  • the end 14 of this longitudinal slot 13 facing the free end of the housing 5 is designed as a displacement limitation for the tab 12 of the clamping jaws 3. So if the tab 12 of the jaws 3 comes to rest at the end 14 of the longitudinal slot 13, the receiving part 4 can be moved further towards the end cap 10 without the jaws 3 being able to follow. As a result, the clamping jaws 3 located in the clamping position can be released in a simple manner.
  • the construction shown provides two diametrically opposed grooves 7 in the receiving part 4 and correspondingly two clamping jaws 3.
  • boundary surfaces 15 of the clamping jaws 3 facing the central axis 6 of the receiving part 4 run parallel to the central axis 6 and thus also parallel to one another. It is therefore possible to clamp the entire length of the mandrel with constant force.
  • the boundary surfaces 15 can also have a surface corresponding to the surface design of a pulling mandrel 16 to be used, in order thereby to improve the holding effect precisely during the pulling process. It would be conceivable to provide these boundary surfaces 15 with transverse ribs, depressions, knobs or knurling.
  • the grooves 7 open towards the central axis of the receiving part 4 open into a central bore 17 with the same axis.
  • the two it would also be possible for the two to lie opposite one another in one plane
  • Grooves 7 in the receiving part 4 merge directly into one another and thus form a single, wedge-shaped recess lying symmetrically to the central axis of the receiving part 4. All that then remains between the mutually facing boundary surfaces 15 of the clamping jaws 3 is a corresponding opening into which the mandrel 16 of the blind rivet 2 to be inserted can be inserted. A secure mounting of the pulling mandrel is therefore also guaranteed, since it cannot deflect laterally next to the clamping jaws 3.
  • a pin 18 engages between the clamping jaws 3, which is directed radially to the central axis 6 of the receiving part 4, and is axially aligned and spring-loaded and can be displaced.
  • This pin 18 is slidably held in a support body 19 and pressed by a spring 20 in its use position.
  • the pin 18 causes the torn mandrel 16 to be ejected from the device.
  • the pin 18 is pressed further into the device against the force of the spring 20 (see FIG. 2), so that after the jaws 3 are released and thus after the mandrel 16 is released, the latter is ejected by the spring-loaded pin 18 becomes.
  • the receiving part 4 is held in the housing 5 against rotation.
  • bolts 21 are provided which engage in the longitudinal slots 13 on the housing 5.
  • the projecting bolts 21 penetrate both the longitudinal slots 13 in the housing 5 and the longitudinal slots 22 in the receiving part 4, which is tubular over part of its length.
  • the bolts 21 start from a supporting part 19 which is axially displaceable in the center of the receiving part 4.
  • This support part 19 is loaded by a spring 23, so that the support part 19 is supported on the area of the clamping jaws 3 projecting beyond the grooves 7 in the axial direction.
  • the support member 19 thus causes the jaws 3 are always in their correct operating position and are also held captively in the device.
  • the supporting part 19 can be pulled in a simple manner by gripping the bolts 21 against the rear end of the device 1, whereupon the clamping jaws 3 can be gripped on the tab 12 and pulled out through the longitudinal slots 13.
  • the insertion of new jaws is also possible in the same simple way.
  • the end cap 10 provided at the free end of the housing 5 has a through opening 24 for inserting a pulling mandrel 16 of the blind rivet 2.
  • radially spring-loaded holding means are provided in the area of the through opening 24 of the end cap 10. These holding means can be carried out in various ways, e.g. by means of resilient pins or spring parts or spring-loaded balls, etc., inserted into bores opening radially into the through opening 24,
  • a shaft 25 is inserted at the free end of the receiving part 4.
  • This shaft 25 and the housing 5 can be coupled with a corresponding drive device, which on the one hand causes the turning process when drilling the hole and on the other hand the pulling process when the rivet is set.
  • the device according to the invention is thus a type of attachment for a riveting device, whereby through this A rivet mandrel of a blind rivet used during the drilling process and also during the setting process can be held correctly and correctly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Dowels (AREA)
  • Earth Drilling (AREA)
  • Gripping On Spindles (AREA)
  • Clamps And Clips (AREA)

Abstract

PCT No. PCT/EP92/02861 Sec. 371 Date Aug. 11, 1993 Sec. 102(e) Date Aug. 11, 1993 PCT Filed Dec. 10, 1992 PCT Pub. No. WO93/11890 PCT Pub. Date Jun. 24, 1993.A device for screwing-in and setting self-drilling blind rivets in a structure, has a clamping unit with two clamping jaws for holding a spindle of a rivet inserted therebetween. The jaws are guided in complementary grooves provided in a retaining unit which is installed in a tubular housing. A cover cap is inserted in the housing for limiting a displacement path of the retaining unit and the clamping jaws in a direction of a central axis of the retaining unit. A shaft to be connected to a driving unit for driving the screwing-in and setting device is inserted in the retaining unit. The shaft acts on a spring-loaded support having radially protruding bolts slidable in longitudinal slits provided in the housing. A displacement path of the retaining unit in the direction towards a free end of the housing is longer than that of the clamping laws.

Description

Die Erfindung betrifft eine Vorrichtung zum Eindrehen und Setzen von selbstbohrenden Zugblindnieten mit wenigstens einer einen eingesetzten Zugdorn form- und/oder kraftschlüssig haltenden Spannbacke.The invention relates to a device for screwing in and setting self-drilling blind rivets with at least one clamping jaw that holds an inserted pulling mandrel in a positive and / or non-positive manner.

Eine solche Vorrichtung ist beispielsweise aus der EP-A-0 213 101 oder der FR-A-2 253 583 bekannt. In einem Aufnahmeteil, welcher an seinem vorderen Ende eine kegelstumpfförmige Ausnehmung aufweist, sind zwei Spannbacken einander diametral gegenüberliegend angeordnet. Diese Spannbacken haben an ihrer Außenbegrenzung ebenfalls eine kegelabschnittförmige Oberfläche, so daß durch axiales Eindrücken der Spannbacken in den Aufnahmeteil ein eingeschobener Zugdorn erfaßt und gehalten werden kann. Für eine ordnungsgemäße Drehmitnahme ergeben sich bei einer solchen Konstruktion Probleme, da infolge des auftretenden Drehmomentes eine teilweise und nicht unbedingt gleichmäßige Winkelverschiebung der beiden Spannbacken stattfinden kann. Außerdem ist es nicht möglich, die Radien der Öffnung im Aufnahmeteil und am Außenbereich der Spannbacken in jedem axialen Verstellbereich aufeinander abzustimmen, so daß sich hier infolge der nicht möglichen satten Anlage Ungenauigkeiten ergeben.Such a device is known for example from EP-A-0 213 101 or FR-A-2 253 583. In a receiving part, which has a frustoconical recess at its front end, two clamping jaws are arranged diametrically opposite one another. These clamping jaws also have a conical section-shaped surface on their outer boundary, so that an inserted mandrel can be gripped and held by axially pressing the clamping jaws into the receiving part. For such a construction there are problems for a proper rotational driving, since a partial and not necessarily uniform angular displacement of the two clamping jaws can take place as a result of the torque that occurs. In addition, it is not possible to match the radii of the opening in the receiving part and on the outer region of the clamping jaws in each axial adjustment range, so that inaccuracies result here as a result of the impossibility of a full system.

Die Erfindung hat sich daher zur Aufgabe gestellt, eine Vorrichtung der eingangs genannten Art zu schaffen, bei der eine exakte Lagesicherung der Spannbacken gegeben ist und mit welcher eine optimale Übertragung des notwendigen Drehmoments auf den Zugdorn eines einzudrehenden und zu setzenden Zugblindniets möglich ist.The invention has therefore set itself the task of creating a device of the type mentioned, in which there is an exact positional securing of the clamping jaws and with which an optimal transmission of the necessary torque to the mandrel of a blind rivet to be screwed in and set is possible.

Erfindungsgemäß wird dazu vorgeschlagen, daß die Spannbacke(n) plättchenförmig ausgebildet und in einem Aufnahmeteil in radial zu dessen Mittelachse hin offenen Nut(en) geführt ist bzw. sind, wobei der Nutgrund und die zugeordnete Begrenzungsfläche einer Spannbacke in gleichem spitzem Winkel zur Mittelachse des Aufnahmeteils und in Richtung zum freien Ende desselben hin verjüngend verlaufen, und daß der Aufnahmeteil in einem zumindest beim Setzvorgang gegen Verdrehen sicherbaren Gehäuse axial verschiebbar gehalten ist.According to the invention, it is proposed that the clamping jaw (s) be plate-shaped and be or are guided in a receiving part in a groove (s) open radially towards its central axis, the groove base and the associated boundary surface of a clamping jaw being at the same acute angle to the central axis of the Recording part and taper towards the free end thereof, and that the receiving part is held axially displaceably in a housing which can be secured against rotation at least during the setting process.

Durch diese erfindungsgemäßen Maßnahmen sind die Spannbacken in Drehrichtung optimal gesichert, da sie beidseitig an Führungsflächen, also an den seitlichen Begrenzungsflächen einer radial verlaufenden Nut abgestützt sind. Daher ist auch immer gewährleistet, daß die Spannbacken konkret in Richtung zur Mittelachse des Aufnahmeteils wirken. Es ist also stets eine optimale Drehmitnahme eines eingesetzten Zugdornes eines Zugblindniets gewährleistet und für die Kraftaufnahme in Drehrichtung ergeben sich keinerlei Probleme. Die Herstellung der Spannbacken ist durch die plättchenförmige Ausgestaltung sehr einfach, wobei eine exakte Bearbeitung durch Stanz- und Fräsvorgänge möglich ist. Es ist daher auch eine wesentlich größere Materialauswahl gegeben, womit vermieden werden kann, daß einzelne Abschnitte der Spannbacken eine spröde Materialstruktur aufweisen, was insbesondere bei der Herstellung durch einen Preßvorgang vorkommen kann.Through these measures according to the invention, the clamping jaws are optimally secured in the direction of rotation, since they are supported on both sides on guide surfaces, that is to say on the lateral boundary surfaces of a radially extending groove. Therefore, it is always guaranteed that the clamping jaws act specifically in the direction of the central axis of the receiving part. It is therefore always an optimal turning entrainment of an inserted mandrel of a blind blind rivet and there are no problems for the force absorption in the direction of rotation. The manufacture of the clamping jaws is very simple due to the platelet-shaped design, with precise machining by punching and milling processes being possible. There is therefore also a substantially larger selection of materials, with which it can be avoided that individual sections of the clamping jaws have a brittle material structure, which can occur, in particular, during manufacture by means of a pressing process.

Auch bei nicht fest angepreßten Spannbacken ist durch die besondere Lagesicherung derselben eine ordnungsgemäße Drehmitnahme des mit einem Angriffsabschnitt versehenen Zugdornes eines Zugblindniets möglich, da die Backen keinesfalls seitlich ausweichen können. Es ist daher ein gerade bei selbstbohrenden Zugblindnieten vorteilhaftes, taumelndes Erfassen des Zugdornes möglich. Insbesondere dann, wenn die Bohrspitze nicht exakt mit der Mittelachse des Zugblindniets ausgerichtet ist, kann durch eine taumelnde Bewegungsmöglichkeit des Zugblindniets beim Bohrvorgang trotzdem ein exakt rundes Loch gebohrt werden, wobei außerdem Erschütterungen auf die Vorrichtung selbst nicht übertragen werden.Even when the clamping jaws are not firmly pressed, the special securing of the position of the clamping jaws enables proper rotation of the pulling mandrel of a blind blind rivet provided with an engagement section, since the jaws can in no way deflect laterally. It is therefore possible, particularly in the case of self-drilling blind rivets, to wobble and grasp the mandrel. In particular, if the drill tip is not exactly aligned with the central axis of the pull-blind rivet, a wobbling possibility of movement of the pull-blind rivet allows a precisely round hole to be drilled during the drilling process, with vibrations not being transmitted to the device itself.

Besonders vorteilhaft wirkt sich auch aus, daß durch die spezielle Ausbildung und Anordnung der Spannbacken die Möglichkeit geschaffen worden ist, daß die Drehmitnahme des Zugblindniets beim Bohrvorgang allein über den Zugdorn erfolgen kann, so daß also keinerlei Notwendigkeit eines zusätzlichen Angriffs am Flansch der Niethülse gegeben ist. Gerade dadurch ist es möglich geworden, Niethülsen mit lackierter oder sonstwie beschichteter Oberfläche einzusetzen, da eben weder beim Bohr- noch beim Setzvorgang ein Eingriff und somit eine Beschädigung der Niethülse bzw. des Flansches derselben erfolgt.It also has a particularly advantageous effect that the special design and arrangement of the clamping jaws has made it possible for the pull-type blind rivet to be rotated during the drilling process solely via the mandrel, so that there is no need for an additional attack on the flange of the rivet sleeve . This has made it possible to use rivet sleeves with a lacquered or otherwise coated surface, because neither There is an intervention during drilling and thus damage to the rivet sleeve or the flange thereof.

Erfindungsgemäß wird ferner vorgeschlagen, daß sowohl dem Aufnahmeteil als auch der bzw. den Spannbacke(n) im Gehäuse eine Verschiebebegrenzung zugeordnet ist, wobei der Verschiebeweg des Aufnahmeteils in Richtung zum freien Ende des Gehäuses hin länger ist als der Verschiebeweg der Spannbacke(n) in dieser Richtung. Es ist daher in einfacher Weise eine Auslösemöglichkeit für die in radialer Richtung angepreßten Spannbacken geschaffen worden. Allein durch eine axiale Weiterbewegung des Aufnahmeteils werden die Spannbacken gelöst, so daß der noch festgehaltene Abschnitt des Zugdornes nach dem Setzen des Zugblindniets freigegeben wird.According to the invention, it is further proposed that both the receiving part and the clamping jaw (s) in the housing are assigned a displacement limitation, the displacement path of the receiving part towards the free end of the housing being longer than the displacement path of the clamping jaw (s) in this direction. It is therefore a simple way to trigger the clamping jaws pressed in the radial direction. The clamping jaws are released only by an axial further movement of the receiving part, so that the section of the mandrel which is still held in place is released after the blind blind rivet has been set.

Dabei ist es sinnvoll, wenn als Verschiebebegrenzung für den Aufnahmeteil am freien Ende des Gehäuses eine Abschlußkappe vorgesehen ist.It makes sense if an end cap is provided as a displacement limit for the receiving part at the free end of the housing.

Eine weitere vorteilhafte Maßnahme liegt darin, daß die Spannbacke(n) an ihrem rückwärtigen Ende eine radial nach außen frei auskragende Lasche aufweist bzw. aufweisen und diese Lasche in einen Längsschlitz im Gehäuse eingreift, wobei das dem freien Ende des Gehäuses zugewandte Ende des Längsschlitzes als Verschiebebegrenzung für die Lasche der Spannbacke(n) ausgeführt ist. Diese an den Spannbacken frei auskragende Lasche bildet also eine einfache konstruktive Ausführung, um die Verschiebebegrenzung für die Spannbacken zu bewirken. Außerdem stellt diese Lasche eine weitere Möglichkeit dar, den Aufnahmeteil und das Gehäuse in Drehrichtung gesehen miteinander zu verbinden. Von besonderem Vorteil ist zusätzlich, daß gerade durch diese Lasche, aber auch durch die besondere Halterung der Spannbacken in den Nuten des Aufnahmeteils, ein einfaches Auswechseln der Spannbacken möglich geworden ist. Die Spannbacken können ohne Demontage der gesamten Vorrichtung durch Erfassen an der Lasche aus der Vorrichtung herausgezogen werden. Es ist also in einfacher Weise über den im Gehäuse vorgesehenen Längsschlitz ein Entfernen und Neueinsetzen der Spannbacken möglich.Another advantageous measure is that the clamping jaw (s) has or have a radially outwardly projecting tab at its rear end and this tab engages in a longitudinal slot in the housing, the end of the longitudinal slot facing the free end of the housing as Limitation of displacement for the tab of the clamping jaw (s) is carried out. This tab, which projects freely on the clamping jaws, therefore forms a simple design in order to limit the displacement of the clamping jaws. In addition, this tab represents a further possibility of connecting the receiving part and the housing to one another as seen in the direction of rotation. It is also of particular advantage that this tab, but also by the special mounting of the clamping jaws in the grooves of the receiving part, makes it easy to replace the clamping jaws. The jaws can be pulled out of the device without removing the entire device by grasping the tab. It is therefore possible in a simple manner to remove and reinsert the clamping jaws via the longitudinal slot provided in the housing.

Gemäß einer Ausführungsvariante wird vorgeschlagen, daß zwei einander diametral gegenüberliegende Nuten im Aufnahmeteil und entsprechend zwei Spannbacken vorgesehen sind. Es hat sich schon bei Versuchen gezeigt, daß allein zwei einander diametral gegenüberliegende Spannbacken der erfindungsgemäßen Art ausreichen, um eine ordnungsgemäße Drehmitnahme und ein ordnungsgemäßes Erfassen des Zugdornes beim Setzvorgang zu gewährleisten.According to one embodiment variant, it is proposed that two diametrically opposite grooves are provided in the receiving part and correspondingly two clamping jaws. It has already been shown in experiments that two alone are diametrically opposed to one another opposing clamping jaws of the type according to the invention are sufficient to ensure proper rotational driving and proper gripping of the pulling mandrel during the setting process.

Ferner ist vorgesehen, daß die zur Mittelachse des Aufnahmeteils weisende Begrenzungsfläche der Spannbacke(n) parallel zu dieser verläuft. Eine solche Ausgestaltung ist praktisch nur im Zusammenhang mit der Halterung der Spannbacken in Radialnuten möglich, da zwischen dem Nutgrund und der zugeordneten Begrenzungsfläche der Spannbacken eine stete, gleichbleibende Anlage gegeben ist. Es ist daher immer gewährleistet, daß ein eingesetzter Zugdorn über dessen ganze, zwischen die Spannbacke eingreifende Länge sicher gehalten werden kann.It is also provided that the boundary surface of the clamping jaw (s) facing the central axis of the receiving part runs parallel to the latter. Such a configuration is practically only possible in connection with the mounting of the clamping jaws in radial grooves, since there is a constant, constant contact between the base of the groove and the associated boundary surface of the clamping jaws. It is therefore always ensured that an inserted mandrel can be securely held over its entire length engaging between the clamping jaw.

Um neben der kraftschlüssigen Haltekraft der Spannbacken zusätzlich auch noch eine formschlüssige Halterung bzw. eine Erhöhung der Reibung zu bewirken, wird vorgeschlagen, daß die zur Mittelachse des Aufnahmeteils weisende Begrenzungsfläche der Spannbacke(n) eine zur Oberflächengestaltung eines einzusetzenden Zugdornes korrespondierende Oberfläche aufweist. In diesem Zusammenhang ist es vorteilhaft, wenn die zur Mittelachse des Aufnahmeteils weisende Begrenzungsfläche der Spannbacke(n) mit Querrippen, Vertiefungen, Noppen oder einer Rändelung versehen ist.In order to additionally achieve a positive holding or an increase in the friction in addition to the non-positive holding force of the clamping jaws, it is proposed that the limiting surface of the clamping jaw (s) facing the central axis of the receiving part has a surface corresponding to the surface design of a tension mandrel to be used. In this context, it is advantageous if the boundary surface of the clamping jaw (s) facing the central axis of the receiving part is provided with transverse ribs, depressions, knobs or knurling.

Eine vorteilhafte konstruktive Variante ergibt sich dann, wenn zwischen die radial zur Mittelachse des Aufnahmeteils gerichteten Spannbacken ein achsgleich zur Mittelachse ausgerichteter und federbelastet verschiebbarer Stift eingreift. Dadurch wird der nach dem Lösen der Verspannung der Spannbacken noch in der Vorrichtung verbleibende Abschnitt eines Nietdornes in einfacher Weise ausgeworfen.An advantageous constructive variant is obtained when a pin engages between the clamping jaws directed radially to the central axis of the receiving part and is axially aligned and spring-loaded displaceable. As a result, the section of a rivet mandrel still remaining in the device after releasing the tensioning of the clamping jaws is ejected in a simple manner.

Obwohl der Aufnahmeteil bereits durch die auskragende Lasche der Spannbacken verdrehfest im Gehäuse gehalten ist, ist es vorteilhaft, wenn dazu noch weitere Maßnahmen beitragen. Es ist daher vorgesehen, daß der Aufnahmeteil mit radial auskragenden Bolzen in Längsschlitze des Gehäuses eingreift. Damit ist wohl eine axiale Verschiebung zwischen Aufnahmeteil und Gehäuse möglich, gleichzeitig aber auch eine Sicherung in Drehrichtung gewährleistet.Although the receiving part is already held against rotation in the housing by the projecting tab of the clamping jaws, it is advantageous if further measures contribute to this. It is therefore provided that the receiving part engages with longitudinally projecting bolts in the longitudinal slots of the housing. This is probably an axial displacement between the receiving part and the housing, but at the same time also ensures a backup in the direction of rotation.

Eine besondere konstruktive Gestaltung einer solchen Ausführung sieht vor, daß die auskragenden Bolzen Längsschlitze am Gehäuse und am über einen Teil seiner Länge rohrförmig ausgebildeten Aufnahmeteil durchdringen und von einem mittig im Aufnahmeteil axial verschiebbar geführten Tragteil ausgehen. Die Bolzen greifen also sowohl in Längsschlitze des Gehäuses als auch des Aufnahmeteils ein und verriegeln diese beiden Teile in Drehrichtung. Außerdem besteht dadurch die Möglichkeit, vom Tragteil der Bolzen weitere Funktionen abzuleiten.A special constructive design of such an embodiment provides that the projecting bolts penetrate longitudinal slots on the housing and on the tubular part formed over part of its length and start from a supporting part which is axially displaceable in the center of the receiving part. The bolts therefore engage both in the longitudinal slots of the housing and in the receiving part and lock these two parts in the direction of rotation. In addition, there is the possibility of deriving further functions from the supporting part of the bolt.

Insbesondere vorteilhaft ist es, wenn der Tragteil in Richtung auf die Spannbacken hin federbelastet ausgeführt ist und auf dem die Nuten in axialer Richtung überragenden Bereich der Spannbacken abgestützt ist. Es können daher die Spannbacken in einfacher Weise ständig in Spannrichtung federbelastet ausgeführt werden, wobei diese Federkraft beim Einführen des Zugdornes in die Vorrichtung keinesfalls hindern entgegenwirkt. Durch diese Maßnahme ist gewährleistet, daß die Spannbacken stets in ihrer entsprechenden Lage im Aufnahmeteil und somit auch verliersicher gehalten sind. Zum Auswechseln der Spannbacken muß lediglich dieser Tragteil durch Erfassen der radial auskragenden Bolzen entgegen der Kraft der Feder angehoben werden, so daß die Spannbacken freiliegen. Die Spannbacken können dann an ihrer auskragenden Lasche erfaßt und herausgenommen werden.It is particularly advantageous if the supporting part is designed to be spring-loaded in the direction of the clamping jaws and on which the area of the clamping jaws projecting beyond the grooves in the axial direction is supported. The clamping jaws can therefore be designed to be constantly spring-loaded in the clamping direction in a simple manner, this spring force in no way preventing the insertion of the pulling mandrel into the device. This measure ensures that the clamping jaws are always held in their corresponding position in the receiving part and thus also in a captive manner. To replace the clamping jaws, this supporting part only has to be raised by gripping the radially projecting bolts against the force of the spring, so that the clamping jaws are exposed. The jaws can then be gripped and removed on their projecting tab.

Der Tragteil kann aber noch weitere Funktionen übernehmen, und zwar dann, wenn der federbelastete Stift im Tragkörper geführt und getrennt von diesem federbelastet ausgeführt ist. Es ist daher in einer einfachen Konstruktion möglich, den zwischen die Spannbacken eingreifenden und den Auswurf des abgetrennten Zugdornes bewirkenden Stift ordnungsgemäß zu halten und federbelastet auszubilden.However, the support part can also take on further functions, namely when the spring-loaded pin is guided in the support body and is designed to be spring-loaded separately from it. It is therefore possible in a simple construction to properly hold the pin which engages between the clamping jaws and causes the ejection of the separated pulling mandrel and is designed to be spring-loaded.

Die gesamte Konstruktion der Vorrichtung ist sehr einfach aufgebaut und kann auch in einfacher Weise an einen Antrieb gekuppelt werden. In vorteilhafter Weise ist daher vorgesehen, daß an dem, dem freien Ende abgewandten Ende des Aufnahmeteils eine mit einem Antrieb bzw. einer Zugvorrichtung kuppelbare Welle eingesetzt ist.The entire construction of the device is very simple and can also be coupled to a drive in a simple manner. It is therefore advantageously provided that a shaft which can be coupled to a drive or a pulling device is inserted at the end of the receiving part which faces away from the free end.

Bei der einfachsten Ausführung der Vorrichtung ist vorgesehen, daß die zur Mittelachse des Aufnahmeteils hin offenen Nuten in eine mittige, achsgleiche Bohrung münden. Es sind bei einer solchen Ausführung dann allerdings zwei Arbeitsgänge erforderlich, nämlich einerseits die Herstellung der Bohrung und andererseits die Herstellung der Nuten in einem Fräsvorgang.In the simplest embodiment of the device, it is provided that the grooves open towards the central axis of the receiving part open into a central, axially identical bore. However, two operations are then required with such a design, namely on the one hand the production of the bore and on the other hand the production of the grooves in one milling process.

Gerade durch die besondere Ausbildung der Spannbacken und die zur Führung derselben vorgesehenen Nuten ist es möglich geworden, die Halterungen für die einzusetzenden Spannbacken in einem Arbeitsgang herzustellen. Dazu wird vorgeschlagen, daß zwei einander in einer Ebene gegenüberliegende Nuten im Aufnahmeteil direkt ineinander übergehen und somit eine einzige, keilförmige, symmetrisch zur Mittelachse des Aufnahmeteils liegende Ausnehmung bilden. Eine solche Nut kann in einfacher Weise durch ein Fräswerkzeug hergestellt werden, und es ist daher auch sichergestellt, daß der Zugdorn nicht seitlich neben den einander zugewandten Begrenzungsflächen der Spannbacken eingreifen kann. Der Zugdorn ist somit immer zwischen den einander zugewandten Begrenzungsflächen der Spannbacken eingesetzt, welche ja auch über die ganze Breite der Nut gehen.The special design of the clamping jaws and the grooves provided to guide them have made it possible to produce the holders for the clamping jaws to be used in one operation. For this purpose, it is proposed that two mutually opposite grooves in the receiving part merge directly into one another and thus form a single, wedge-shaped recess which is symmetrical to the central axis of the receiving part. Such a groove can be produced in a simple manner by a milling tool, and it is therefore also ensured that the mandrel cannot engage laterally next to the mutually facing boundary surfaces of the clamping jaws. The mandrel is therefore always inserted between the facing boundary surfaces of the clamping jaws, which also extend across the entire width of the groove.

Zur Verbesserung der Verschiebemöglichkeit der Spannbacken in den Nuten und zur exakteren Führung derselben in den Nuten wird vorgeschlagen, daß der Nutgrund und die zugeordnete Begrenzungsfläche der Spannbacke im Querschnitt bogenförmig ausgebildet sind. Eine solche Ausgestaltung ist nur bei Ausbildung von Nuten möglich, da die Bogenform bzw. der Radius der Begrenzungsflächen über die ganze Länge des Nutgrundes bzw. über die ganze Länge der zugeordneten Begrenzungsfläche der Spannbacke gleichbleibend ist.In order to improve the possibility of displacement of the clamping jaws in the grooves and to guide them more precisely in the grooves, it is proposed that the groove base and the associated delimiting surface of the clamping jaw have an arcuate cross section. Such an embodiment is only possible if grooves are formed, since the arc shape or the radius of the boundary surfaces is constant over the entire length of the groove base or over the entire length of the associated boundary surface of the clamping jaw.

Um ein noch leichteres und von der Handhabung her einfacheres Auswechseln der Spannbacken zu ermöglichen, wird vorgeschlagen, daß am Gehäuse getrennte und winkelmäßig versetzt zueinander angeordnete Längsschlitze für den Eingriff der Lasche der Spannbacken und für die auskragenden Bolzen des Aufnahmeteils bzw. des Tragteils vorgesehen sind. Es können daher z.B. die Bolzen entgegen der Kraft der Feder zurückgezogen werden, wobei die Spannbacken in den beispielsweise um 90° versetzt dazu liegenden Schlitzen erfaßt und herausgenommen bzw. wieder eingesetzt werden können.In order to enable an even easier and easier to replace the clamping jaws, it is proposed that separate and angularly offset longitudinal slots on the housing are provided for the engagement of the tab of the clamping jaws and for the projecting bolts of the receiving part or the supporting part. Therefore, e.g. the bolts are retracted against the force of the spring, and the clamping jaws can be gripped in the slots, for example offset by 90 °, and removed or reinserted.

Da der Zugdorn für eine ordnungsgemäße Drehmitnahme beim Bohrvorgang nicht unbedingt fest eingespannt zwischen den Spannbacken gehalten sein muß, wodurch sich ja auch ein optimaler und schwingungsfreier Bohrvorgang ergibt, ist es vorteilhaft, wenn der einzusetzende Niet trotzdem verliersicher in der Vorrichtung gehalten werden kann. Dazu wird vorgeschlagen, daß die am freien Ende des Gehäuses vorgesehene Abschlußkappe eine Durchgangsöffnung zum Durchstecken eines Zugdornes aufweist, wobei im Bereich der Durchgangsöffnung radial federbelastete Haltemittel vorgesehen sind. Es ist durch diese Zusatzmaßnahme gewährleistet, daß ein in die Vorrichtung eingesteckter Zugblindniet bis zum Bohrvorgang bzw. bis zum Setzvorgang auch unverlierbar in der Vorrichtung gehalten wird.Since the mandrel does not necessarily have to be firmly clamped between the clamping jaws for proper rotational driving during the drilling process, as a result if there is also an optimal and vibration-free drilling process, it is advantageous if the rivet to be used can nevertheless be held captively in the device. For this purpose, it is proposed that the end cap provided at the free end of the housing has a through opening for inserting a pulling mandrel, radially spring-loaded holding means being provided in the region of the through opening. This additional measure ensures that a pull-blind rivet inserted into the device is also held captively in the device until the drilling process or until the setting process.

Weitere Merkmale und besondere Vorteile der Erfindung werden anhand der Zeichnungen in der nachstehenden Beschreibung noch näher erläutert. Es zeigen:

Fig. 1
eine Vorrichtung in einem Längsschnitt mit einem in Einführstellung zugeordneten Blindniet;
Fig. 2
einen gleichen Längsschnitt durch die Vorrichtung, wobei der Blindniet in die Vorrichtung eingesetzt ist;
Fig. 3
einen Schnitt nach der Linie III-III in Fig. 2;
Fig. 4
einen Längsschnitt durch die Vorrichtung in einer Stellung nach Beendigung des Setzvorganges des Blindniets.
Further features and particular advantages of the invention are explained in more detail with reference to the drawings in the description below. Show it:
Fig. 1
a device in a longitudinal section with a blind rivet assigned in the insertion position;
Fig. 2
a same longitudinal section through the device, wherein the blind rivet is inserted into the device;
Fig. 3
a section along the line III-III in Fig. 2;
Fig. 4
a longitudinal section through the device in a position after completion of the setting process of the blind rivet.

Die Vorrichtung 1 zum Eindrehen und Setzen von selbstbohrenden Zugblindnieten 2 besteht im wesentlichen aus Spannbacken 3, einem Aufnahmeteil 4 sowie einem Gehäuse 5. Die Spannbacken 3 sind plättchenförmig ausgebildet und im Aufnahmeteil 4 in radial zu dessen Mittelachse 6 hin offenen Nuten 7 geführt. Der Nutgrund 8 und die zugeordnete Begrenzungsfläche 9 einer Spannbacke 3 verlaufen in gleichem spitzem Winkel zur Mittelachse 6 und in Richtung zum freien Ende desselben hin verjüngend.The device 1 for screwing in and setting self-drilling blind rivets 2 consists essentially of clamping jaws 3, a receiving part 4 and a housing 5. The clamping jaws 3 are plate-shaped and are guided in the receiving part 4 in grooves 7 which are open radially towards its central axis 6. The groove base 8 and the associated boundary surface 9 of a clamping jaw 3 run at the same acute angle to the central axis 6 and taper towards the free end thereof.

Im Gehäuse 5 ist sowohl für den Aufnahmeteil 4 als auch für die Spannbacken 3 eine Verschiebebegrenzung vorgesehen, wobei der Verschiebeweg des Aufnahmeteils 4 in Richtung zum freien Ende des Gehäuses 5 hin länger ist als der Verschiebeweg der Spannbacken 3 in dieser Richtung. Als Verschiebebegrenzung für den Aufnahmeteil 4 ist am freien Ende des Gehäuses 5 eine Abschlußkappe 10 vorgesehen. Die Innenfläche 11 dieser Abschlußkappe 10 bildet einen Anschlag als Verschiebebegrenzung für den Aufnahmeteil 4 in Richtung zum freien Ende des Gehäuses 5 hin.A displacement limit is provided in the housing 5 both for the receiving part 4 and for the clamping jaws 3, the displacement path of the receiving part 4 in the direction of the free end of the housing 5 being longer than the displacement path the jaws 3 in this direction. An end cap 10 is provided at the free end of the housing 5 as a displacement limitation for the receiving part 4. The inner surface 11 of this end cap 10 forms a stop as a displacement limitation for the receiving part 4 in the direction of the free end of the housing 5.

Die Spannbacken 3 weisen an ihrem rückwärtigen Ende eine radial nach außen frei auskragende Lasche 12 auf, welche in einen Längsschlitz 13 im Gehäuse 5 eingreift. Das dem freien Ende des Gehäuses 5 zugewandte Ende 14 dieses Längsschlitzes 13 ist als Verschiebebegrenzung für die Lasche 12 der Spannbacken 3 ausgeführt. Wenn also die Lasche 12 der Spannbacken 3 am Ende 14 des Längsschlitzes 13 zur Anlage kommt, kann der Aufnahmeteil 4 noch weiter in Richtung zur Abschlußkappe 10 hin bewegt werden, ohne daß die Spannbacken 3 folgen können. Es kann dadurch in einfacher Weise ein Lösen der sich in Spannstellung befindlichen Spannbacken 3 bewirkt werden.The jaws 3 have at their rear end a radially outwardly projecting tab 12 which engages in a longitudinal slot 13 in the housing 5. The end 14 of this longitudinal slot 13 facing the free end of the housing 5 is designed as a displacement limitation for the tab 12 of the clamping jaws 3. So if the tab 12 of the jaws 3 comes to rest at the end 14 of the longitudinal slot 13, the receiving part 4 can be moved further towards the end cap 10 without the jaws 3 being able to follow. As a result, the clamping jaws 3 located in the clamping position can be released in a simple manner.

Die gezeigte Konstruktion sieht zwei einander diametral gegenüberliegende Nuten 7 im Aufnahmeteil 4 und entsprechend zwei Spannbacken 3 vor. Im Rahmen der Erfindung ist es auch denkbar, lediglich eine Spannbacke 3 anzuordnen, wobei dann dieser gegenüberliegend eine feste Anschlagfläche im Aufnahmeteil 4 vorgesehen ist. Es wäre aber auch denkbar, mehr als zwei Spannbacken 3 und entsprechend Nuten vorzusehen, also beispielsweise drei oder mehrere Spannbacken 3 und Nuten 7.The construction shown provides two diametrically opposed grooves 7 in the receiving part 4 and correspondingly two clamping jaws 3. Within the scope of the invention, it is also conceivable to arrange only one clamping jaw 3, in which case a fixed stop surface is provided in the receiving part 4 opposite this. However, it would also be conceivable to provide more than two clamping jaws 3 and corresponding grooves, for example three or more clamping jaws 3 and grooves 7.

Die zur Mittelachse 6 des Aufnahmeteils 4 weisenden Begrenzungsflächen 15 der Spannbacken 3 verlaufen parallel zur Mittelachse 6 und somit auch parallel zueinander. Es ist daher ein Einspannen über die ganze Länge des Zugdornes mit gleichbleibender Kraft möglich. Die Begrenzungsflächen 15 können aber auch zusätzlich eine zur Oberflächengestaltung eines einzusetzenden Zugdornes 16 korrespondierende Oberfläche aufweisen, um dadurch die Haltewirkung gerade beim Zugvorgang noch zu verbessern. Es wäre dabei denkbar, diese Begrenzungsflächen 15 mit Querrippen, Vertiefungen, Noppen oder einer Rändelung zu versehen.The boundary surfaces 15 of the clamping jaws 3 facing the central axis 6 of the receiving part 4 run parallel to the central axis 6 and thus also parallel to one another. It is therefore possible to clamp the entire length of the mandrel with constant force. However, the boundary surfaces 15 can also have a surface corresponding to the surface design of a pulling mandrel 16 to be used, in order thereby to improve the holding effect precisely during the pulling process. It would be conceivable to provide these boundary surfaces 15 with transverse ribs, depressions, knobs or knurling.

Wie der Ausführung nach Fig. 3 entnommen werden kann, münden die zur Mittelachse des Aufnahmeteils 4 hin offenen Nuten 7 in eine mittige, achsgleiche Bohrung 17. Es wäre aber auch möglich, daß die zwei einander in einer Ebene gegenüberliegenden Nuten 7 im Aufnahmeteil 4 direkt ineinander übergehen und somit eine einzige, keilförmige, symmetrisch zur Mittelachse des Aufnahmeteils 4 liegende Ausnehmung bilden. Zwischen den einander zugewandten Begrenzungsflächen 15 der Spannbacken 3 verbleibt dann lediglich eine entsprechende Öffnung, in welche der Zugdorn 16 des einzusetzenden Blindniets 2 eingeschoben werden kann. Es ist also auch eine sichere Halterung des Zugdornes gewährleistet, da dieser nicht seitlich neben die Spannbacken 3 ausweichen kann.As can be seen from the embodiment according to FIG. 3, the grooves 7 open towards the central axis of the receiving part 4 open into a central bore 17 with the same axis. However, it would also be possible for the two to lie opposite one another in one plane Grooves 7 in the receiving part 4 merge directly into one another and thus form a single, wedge-shaped recess lying symmetrically to the central axis of the receiving part 4. All that then remains between the mutually facing boundary surfaces 15 of the clamping jaws 3 is a corresponding opening into which the mandrel 16 of the blind rivet 2 to be inserted can be inserted. A secure mounting of the pulling mandrel is therefore also guaranteed, since it cannot deflect laterally next to the clamping jaws 3.

Eine vorteilhafte Konstruktion ist ferner darin gelegen, daß der Nutgrund 8 und die zugeordnete Begrenzungsfläche 9 der Spannbacke 3 im Querschnitt bogenförmig ausgebildet sind. Diese konstruktive Gestaltung ist bei Einsatz eines Fräsers für die Herstellung der Nuten 7 in einfacher Weise möglich, wobei gerade durch diese Ausbildung eine ausgezeichnete Führung ohne Verkanten und ohne Kerbwirkung für die Spannbacken 3 gegeben ist.An advantageous construction is also that the groove base 8 and the associated boundary surface 9 of the jaw 3 are arcuate in cross section. This constructive design is possible in a simple manner when using a milling cutter for the production of the grooves 7, with this design providing excellent guidance without tilting and without a notching effect for the clamping jaws 3.

Zwischen die radial zur Mittelachse 6 des Aufnahmeteils 4 gerichteten Spannbacken 3 greift ein achsgleich zur Mittelachse 6 ausgerichteter und federbelastet verschiebbarer Stift 18 ein. Dieser Stift 18 ist in einem Tragkörper 19 verschiebbar gehalten und durch eine Feder 20 in dessen Einsatzstellung gedrückt. Bei eingesetztem Zugdorn 16 und nach dem Setzvorgang bewirkt der Stift 18 ein Auswerfen des abgerissenen Zugdornes 16 aus der Vorrichtung. Beim Eindrücken des Zugdornes 16 wird der Stift 18 entgegen der Kraft der Feder 20 weiter in die Vorrichtung hineingedrückt (siehe Fig. 2), so daß nach dem Lösen der Spannbacken 3 und somit nach Freigabe des Zugdornes 16 dieser durch den federbelastet zurückschnellenden Stift 18 ausgeworfen wird.A pin 18 engages between the clamping jaws 3, which is directed radially to the central axis 6 of the receiving part 4, and is axially aligned and spring-loaded and can be displaced. This pin 18 is slidably held in a support body 19 and pressed by a spring 20 in its use position. When the mandrel 16 is inserted and after the setting process, the pin 18 causes the torn mandrel 16 to be ejected from the device. When the mandrel 16 is pressed in, the pin 18 is pressed further into the device against the force of the spring 20 (see FIG. 2), so that after the jaws 3 are released and thus after the mandrel 16 is released, the latter is ejected by the spring-loaded pin 18 becomes.

Der Aufnahmeteil 4 ist im Gehäuse 5 verdrehfest gehalten. Zu diesem Zweck sind Bolzen 21 vorgesehen, welche in die Längsschlitze 13 am Gehäuse 5 eingreifen. Die auskragenden Bolzen 21 durchdringen sowohl die Längsschlitze 13 im Gehäuse 5 als auch die Längsschlitze 22 in dem über einen Teil seiner Länge rohrförmig ausgebildeten Aufnahmeteil 4. Die Bolzen 21 gehen von einem mittig im Aufnahmeteil 4 axial verschiebbar geführten Tragteil 19 aus. Dieser Tragteil 19 ist durch eine Feder 23 belastet, so daß der Tragteil 19 an dem die Nuten 7 in axialer Richtung überragenden Bereich der Spannbacken 3 abgestützt ist. Der Tragteil 19 bewirkt somit, daß sich die Spannbacken 3 stets in ihrer ordnungsgemäßen Einsatzstellung befinden und auch verliersicher in der Vorrichtung gehalten werden.The receiving part 4 is held in the housing 5 against rotation. For this purpose, bolts 21 are provided which engage in the longitudinal slots 13 on the housing 5. The projecting bolts 21 penetrate both the longitudinal slots 13 in the housing 5 and the longitudinal slots 22 in the receiving part 4, which is tubular over part of its length. The bolts 21 start from a supporting part 19 which is axially displaceable in the center of the receiving part 4. This support part 19 is loaded by a spring 23, so that the support part 19 is supported on the area of the clamping jaws 3 projecting beyond the grooves 7 in the axial direction. The support member 19 thus causes the jaws 3 are always in their correct operating position and are also held captively in the device.

Sollen nun die Spannbacken ausgewechselt werden, so kann der Tragteil 19 in einfacher Weise durch Erfassen der Bolzen 21 gegen das hintere Ende der Vorrichtung 1 gezogen werden, worauf dann die Spannbacken 3 an der Lasche 12 erfaßt und durch die Längsschlitze 13 herausgezogen werden können. Auch das Einsetzen neuer Spannbacken ist auf die gleiche einfache Art und Weise möglich.If the clamping jaws are now to be replaced, the supporting part 19 can be pulled in a simple manner by gripping the bolts 21 against the rear end of the device 1, whereupon the clamping jaws 3 can be gripped on the tab 12 and pulled out through the longitudinal slots 13. The insertion of new jaws is also possible in the same simple way.

In diesem Zusammenhang ist es gerade für eine einfache Handhabung zweckmäßig, wenn am Gehäuse 5 getrennte und winkelmäßig versetzt zueinander angeordnete Längsschlitze 13 für den Eingriff der Lasche 12 der Spannbacken 3 und für die auskragenden Bolzen 21 des Tragteils 19 vorgesehen sind. Der Tragteil 19 kann dann in einfacher Weise angehoben werden, wobei die Spannbacken 3 um 90° versetzt dazu in den entsprechenden Längsschlitzen erfaßt und durch diese entfernt bzw. eingesetzt werden können.In this context, it is particularly expedient for simple handling if, on the housing 5, separate and angularly offset longitudinal slots 13 are provided for the engagement of the tab 12 of the clamping jaws 3 and for the projecting bolts 21 of the support part 19. The supporting part 19 can then be raised in a simple manner, the clamping jaws 3 being offset by 90 ° to the corresponding longitudinal slots and can be removed or inserted through them.

Die am freien Ende des Gehäuses 5 vorgesehene Abschlußkappe 10 weist eine Durchgangsöffnung 24 zum Durchstecken eines Zugdornes 16 des Blindniets 2 auf. Um den Blindniet in der eingesetzten Lage verliersicher zu halten, auch wenn die Spannbacken 3 noch nicht kraft- oder formschlüssig eingreifen, ist es zweckmäßig, wenn im Bereich der Durchgangsöffnung 24 der Abschlußkappe 10 radial federbelastete Haltemittel vorgesehen sind. Diese Haltemittel können auf verschiedene Art und Weise ausgeführt werden, z.B. durch in radial in die Durchgangsöffnung 24 ausmündende Bohrungen eingesetzte, federnde Stifte oder Federteile bzw. federbelastete Kugeln usw.The end cap 10 provided at the free end of the housing 5 has a through opening 24 for inserting a pulling mandrel 16 of the blind rivet 2. In order to keep the blind rivet captive in the inserted position, even if the clamping jaws 3 do not yet engage in a non-positive or positive manner, it is expedient if radially spring-loaded holding means are provided in the area of the through opening 24 of the end cap 10. These holding means can be carried out in various ways, e.g. by means of resilient pins or spring parts or spring-loaded balls, etc., inserted into bores opening radially into the through opening 24,

Um die erfindungsgemäße Vorrichtung mit einem Antrieb bzw. einer Zugvorrichtung zu kuppeln, ist am freien Ende des Aufnahmeteils 4 eine Welle 25 eingesetzt. Diese Welle 25 und das Gehäuse 5 können mit einer entsprechenden Antriebseinrichtung gekuppelt werden, welche einerseits den Drehvorgang beim Bohren des Loches und andererseits den Zugvorgang beim Setzen des Niets bewirkt. Die erfindungsgemäße Vorrichtung ist also eine Art Vorsatzgerät für eine Nietvorrichtung, wobei durch dieses Vorsatzgerät ein eingesetzter Nietdorn eines Blindniets beim Bohrvorgang und auch beim Setzvorgang lagerichtig und ordnungsgemäß gehalten werden kann.In order to couple the device according to the invention to a drive or a pulling device, a shaft 25 is inserted at the free end of the receiving part 4. This shaft 25 and the housing 5 can be coupled with a corresponding drive device, which on the one hand causes the turning process when drilling the hole and on the other hand the pulling process when the rivet is set. The device according to the invention is thus a type of attachment for a riveting device, whereby through this A rivet mandrel of a blind rivet used during the drilling process and also during the setting process can be held correctly and correctly.

Claims (20)

  1. A device for the screwing-in and setting of self-boring tension blind rivets with at least one clamping jaw retaining an inserted tension mandrel in a form and/or force-locking manner, characterised in that the clamping jaw(s) (3) is/are in the form of small plate(s) and in a mounting member (4) is/are guided in groove(s) (7) open radially towards the centre axis (6) thereof, wherein the groove bottom (8) and the associated boundary surface (9) of one clamping jaw (3) extend tapered at the same acute angle relative to the centre axis (6) of the mounting member (4) and towards the free end thereof, and in that the mounting member (4) is retained axially displaceably in a housing (5) which can be secured against rotation at least during the setting operation.
  2. A device according to Claim 1, characterised in that both the mounting member (4) and the clamping jaw or jaws (3) in the housing (5) are associated with a displacement-limiting means, the displacement travel of the mounting member (4) towards the free end of the housing (5) being longer than the displacement travel of the clamping jaw(s) (3) in this direction.
  3. A device according to Claim 2, characterised in that an end cap (10) is provided as the displacement-limiting means for the mounting member (4) at the free end of the housing (5).
  4. A device according to Claim 2, characterised in that at its/their rear end the clamping jaw(s) (3) has/have a butt plate (12) freely projecting radially outward, and this butt plate (12) engages in a longitudinal slot (13) in the housing (5), wherein the end (14) of the longitudinal slot (13) nearest the free end of the housing (5) is in the form of a displacement-limiting means for the butt plate (12) of the clamping jaw(s) (3).
  5. A device according to any one of Claims 1 to 4, characterised in that two diametrically opposed grooves (7) are provided in the mounting member (4) and correspondingly two clamping jaws (3).
  6. A device according to any one of Claims 1 to 5, characterised in that the boundary surface (15) of the clamping jaw(s) (3) facing towards the centre axis (6) of the mounting member (4) extends parallel thereto.
  7. A device according to Claim 1 and any one of the preceding claims, characterised in that the boundary surface (15) of the clamping jaw(s) (3) facing towards the centre axis (6) of the mounting member (4) has a surface corresponding to the surface configuration of a tension mandrel (16) to be inserted.
  8. A device according to Claim 7, characterised in that the boundary surface (15) of the clamping jaw(s) (3) facing towards the centre axis (6) of the mounting member (4) is provided with transverse ribs, recesses, projections or knurling.
  9. A device according to Claim 1 and any one of the preceding claims, characterised in that a pin (18), which is aligned coaxially to the centre axis (6) and which is displaceable under spring-loading, engages between the clamping jaws (3) directed radially in relation to the centre axis (6) of the mounting member (4).
  10. A device according to Claim 1, characterised in that the mounting member (4) is retained in the housing (5) in a manner precluding relative rotation.
  11. A device according to Claim 10, characterised in that the mounting member (4) engages in longitudinal slots (13) of the housing (5) with radially projecting pins (21).
  12. A device according to Claims 10 and 11, characterised in that the projecting pins (21) pass through longitudinal slots (13, 22) in the housing (5) and in the mounting member (4) of tubular shape over part of its length and they extend from a support member (19) guided axially displaceably centrally in the mounting member (4).
  13. A device according to Claim 12, characterised in that the support member (19) is designed to be spring-loaded towards the clamping jaws (3) and is supported on the region of the clamping jaws (3) projecting over the grooves (7) in axial direction.
  14. A device according to Claim 9, characterised in that the spring-loaded pin (18) is guided in the support member (19) and is designed to be spring-loaded separately therefrom.
  15. A device according to Claim 1 and any one of the preceding claims, characterised in that at the end of the mounting member (4) remote from the free end a shaft (25) is inserted which can be coupled with a drive and/or a tension means.
  16. A device according to Claim 1 and any one of the preceding claims, characterised in that the grooves (7) open towards the centre axis (6) of the mounting member (4) open into a central coaxial bore (17).
  17. A device according to Claim 1 and any one of the preceding claims, characterised in that two grooves (7) in the mounting member (4) situated opposite one another in one plane merge directly into one another and thus form a single wedge-shaped recess situated symmetrically to the centre axis (6) of the mounting member (4).
  18. A device according to Claim 1 and any one of the preceding claims, characterised in that the groove bottom (8) and the associated boundary surface (9) of the clamping jaw (3) are arcuate in cross-section.
  19. A device according to Claims 4 and 11, characterised in that separate longitudinal slots (13), which are arranged angularly offset relative to one another, are provided on the housing (5) for the engagement of the butt plate (12) of the clamping jaws (3) and for the projecting pins (21) of the mounting member (4) and/or of the support member (19).
  20. A device according to Claim 3, characterised in that the end cap (10) provided at the free end of the housing (5) has a through-opening (24) for the passage of a tension mandrel (16), radially spring-loaded retaining means being provided in the vicinity of the through-opening (24).
EP93900031A 1991-12-18 1992-12-10 Device for inserting and setting self-drilling blind tension rivets Expired - Lifetime EP0572607B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4141916A DE4141916C2 (en) 1991-12-18 1991-12-18 Device for screwing in and setting self-drilling blind rivets
DE4141916 1991-12-18
PCT/EP1992/002861 WO1993011890A1 (en) 1991-12-18 1992-12-10 Device for inserting and setting self-drilling blind tension rivets

Publications (3)

Publication Number Publication Date
EP0572607A4 EP0572607A4 (en) 1993-08-06
EP0572607A1 EP0572607A1 (en) 1993-12-08
EP0572607B1 true EP0572607B1 (en) 1995-10-04

Family

ID=6447452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93900031A Expired - Lifetime EP0572607B1 (en) 1991-12-18 1992-12-10 Device for inserting and setting self-drilling blind tension rivets

Country Status (10)

Country Link
US (1) US5452505A (en)
EP (1) EP0572607B1 (en)
JP (1) JPH06505440A (en)
AT (1) ATE128655T1 (en)
AU (1) AU3157593A (en)
CA (1) CA2104105A1 (en)
DE (2) DE4141916C2 (en)
ES (1) ES2080605T3 (en)
FI (1) FI95545C (en)
WO (1) WO1993011890A1 (en)

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DE4215008C1 (en) * 1992-05-06 1993-11-11 Sfs Stadler Holding Ag Heerbru Device for setting a self-drilling clamp fastener
SE508970C2 (en) * 1996-03-20 1998-11-23 Volvo Ab Procedure for attaching a fastener, as well as joints and tools for carrying out the procedure
AU719110B2 (en) * 1996-08-22 2000-05-04 Shane Andrew Robertson Spinlock snap rivet system
US6253448B1 (en) * 1999-03-23 2001-07-03 Electroimpact, Inc. Gripper systems for rivets and collars used in large-scale assembly operations
GB2357056B (en) * 1999-12-06 2003-11-19 Textron Fastening Syst Ltd Riveting tool
US7322783B2 (en) * 2001-11-01 2008-01-29 Newfrey Llc Self-drilling pull-through blind rivet and methods of and apparatus for the assembly and setting thereof
US7146698B2 (en) * 2002-02-18 2006-12-12 Masterfix Products B.V. Hand-held riveting tool
CZ12144U1 (en) * 2002-02-18 2002-03-28 Ms Nářadí, S.R.O. Clamping joint of exchangeable mandrel and pulling pin of a riveting tool and use of such clamping joint for hand-held riveting tool
AU2003291119A1 (en) * 2002-11-21 2004-06-18 Pepper A. L. Aasgaard Rivet setting device for setting self-tapping rivets
US7954218B2 (en) * 2006-01-12 2011-06-07 Electroimpact Self-aligning collar swaging system for airplane panel bolts
TWI446999B (en) * 2012-05-15 2014-08-01 Lite On Technology Corp Blind rivet loading mechanism and method for loading blind rivet
US9458905B2 (en) 2012-09-20 2016-10-04 Steelcase Inc. Spring assembly and method
DE102017119749B4 (en) * 2017-08-29 2021-02-11 Vvg-Befestigungstechnik Gmbh & Co. Manageable blind riveting tool with reverse riveting cycle for holding a blind rivet
CN114433776B (en) * 2022-02-10 2024-06-04 宁波利德光源有限公司 Automatic riveting equipment for LED outdoor lamp reflector and reflector

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US2384434A (en) * 1939-04-28 1945-09-11 Aviat Developments Ltd Riveting tool
BE646128A (en) * 1963-04-05
US3423986A (en) * 1966-03-11 1969-01-28 Rivetmaster Inc Rivet gun for blind rivets
US3626745A (en) * 1969-12-01 1971-12-14 Richline Co Inc The Rivet gun accessory
US3838588A (en) * 1971-05-14 1974-10-01 A Johnson Apparatus for setting unthreaded pull rivets
GB1484259A (en) * 1973-12-08 1977-09-01 Tucker Fasteners Ltd Blind-riveting tools for self-drilling rivets
CN1014035B (en) * 1985-08-14 1991-09-25 柯特·诺德·斯特龙 Tool, esp. for drawind of blind rivets provided with upsetting pins, but also for drilling and screw driving, as well as rivet and drill intended for use in the tool
NO300834B1 (en) * 1990-05-10 1997-08-04 Adolf Wuerth Gmbh & Co Kg Nagle device
DE4020902A1 (en) * 1990-06-30 1992-01-02 Mage Ag SETTING DEVICE
JPH06102241B2 (en) * 1990-07-12 1994-12-14 日本理器株式会社 Riveter
DE4119935A1 (en) * 1991-06-17 1992-12-24 Sfs Stadler Holding Ag TOOL FOR SETTING A SELF-DRILLING RIVET JOINT

Also Published As

Publication number Publication date
FI95545B (en) 1995-11-15
JPH06505440A (en) 1994-06-23
ATE128655T1 (en) 1995-10-15
FI933621A0 (en) 1993-08-17
EP0572607A4 (en) 1993-08-06
DE4141916A1 (en) 1993-06-24
AU3157593A (en) 1993-07-19
CA2104105A1 (en) 1993-06-19
FI933621A (en) 1993-08-17
EP0572607A1 (en) 1993-12-08
DE4141916C2 (en) 1995-05-11
ES2080605T3 (en) 1996-02-01
WO1993011890A1 (en) 1993-06-24
US5452505A (en) 1995-09-26
DE59203910D1 (en) 1995-11-09
FI95545C (en) 1996-02-26

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