EP2609341A1 - Fastening element - Google Patents

Fastening element

Info

Publication number
EP2609341A1
EP2609341A1 EP11748376.8A EP11748376A EP2609341A1 EP 2609341 A1 EP2609341 A1 EP 2609341A1 EP 11748376 A EP11748376 A EP 11748376A EP 2609341 A1 EP2609341 A1 EP 2609341A1
Authority
EP
European Patent Office
Prior art keywords
fastening element
element according
fastener
face
cutting edge
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.)
Withdrawn
Application number
EP11748376.8A
Other languages
German (de)
French (fr)
Inventor
Uwe Frank
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.)
Wuerth International AG
Adolf Wuerth GmbH and Co KG
Original Assignee
Wuerth International AG
Adolf Wuerth GmbH and Co KG
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 Wuerth International AG, Adolf Wuerth GmbH and Co KG filed Critical Wuerth International AG
Publication of EP2609341A1 publication Critical patent/EP2609341A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/08—Hollow rivets; Multi-part rivets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/005—Set screws; Locking means therefor
    • 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
    • B21J15/025—Setting self-piercing rivets
    • 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
    • B21J15/043—Riveting hollow rivets mechanically by pulling a mandrel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B15/00—Nails; Staples
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/08—Hollow rivets; Multi-part rivets
    • F16B19/086—Self-piercing rivets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0021—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being metal, e.g. sheet-metal or aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • F16B25/106—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a self-piercing screw-point, i.e. without removing material

Definitions

  • the invention relates to a fastener which is driven in a jerky movement in a non-perforated underground.
  • the invention is based on the object to provide a suitable for driving into a non-perforated workpiece fastener that results in a simple construction to a lower deformation of the workpiece in the area caused by the fastener attachment.
  • the invention proposes a fastening element with the features mentioned in claim 1. Further developments of the invention are the subject of dependent claims.
  • the fastening element does not contain a point, but rather a punched section with an end face delimited by a peripheral edge.
  • This end face and thus also the peripheral edge bordering it are not located in a plane which runs transversely to the longitudinal axis.
  • the face does not have to be flat, it can also have other shapes. sen.
  • the peripheral edge is advantageously formed at least in the front region (tip) symmetrically around the tip as a cutting edge.
  • the embodiment of the invention results in that the end face first meets the workpiece with its cutting edge at one point, so that the opening of the workpiece begins there.
  • all points of the cutting edge and then the remainder of the peripheral edge gradually come into contact with the workpiece, so that the opening is generated gradually, similar to a shearing.
  • the workpiece is less strongly deformed in the region of the opening and, on the other hand, no excessive braking of the fastening element during penetration is effected.
  • a hole with a clean edge is created. Such a clean edge does not tend to tear, as may occur with a hole created by a tip. This proves to be particularly advantageous if the workpiece made of fabric, plastic, fiber fabric or composite materials instead of the metals commonly used, especially steel.
  • the front punching section of the fastening element has a cylindrical, in particular a circular cylindrical, outer contour.
  • the punching edge is formed by a cutting line between the end face of the fastener and a cylindrical outer contour of the fastener, preferably from the cylindrical outer contour of the punching section.
  • the punching section has a smaller cross section than the actual body of the fastening element. It has been found that forming a hole having a smaller cross-section than the cross-section of the fastener, results in good results in both the design of the fastener and the expense of shooting such a fastener is not too great.
  • a transition section is arranged and formed between the front punching section and the fastening element body, which produces the transition between the larger cross section and the smaller cross section.
  • transition section can now have different shapes.
  • the transition section can be conical, that is, with a straight-line side line.
  • the transition section is ballistic, the side line is thus convexly curved.
  • Another possibility proposed by the invention is that the transition section has a concavely curved side line.
  • the side line of the transition section is composed of sections of different configuration, ie ballistic, conical and concave sections.
  • the oblique course of the end face is intended to cause the peripheral edge which effects the production of the hole to impinge on the workpiece step by step or at different times.
  • the part of the peripheral edge forming the cutting edge is to carry out a cutting operation and then the remainder of the peripheral edge to make a shearing operation.
  • the end face of the punching section occupies a smaller angle with the longitudinal axis of the fastening element in the area immediately radially behind the cutting edge than in its remaining area. This will sharpen the cutting edge. For example, this can be done by the end face is concave.
  • the front region of the stamped portion is made with the end face and the cutting edge of stainless steel, preferably by a cold deformation, a so-called pinching.
  • FIG. 1 shows the side view of a fastening element in the form of a
  • FIG. 1 shows, as an example of a fastening element proposed by the invention, a tubular rivet with a body 1, at one end of which a head 2 is formed.
  • the head 2 projects radially beyond the cylindrical body 1 of the fastener. Its underside forms an abutment shoulder 3, which comes to rest in a fastened state on the upper side of the workpiece.
  • the fastening element In the region of its front end 4 assigned to the workpiece, the fastening element has an end face 5, which is only indicated here.
  • FIG. It is a Dornbruchniet whose body 1 looks the same as the body 1 of the fastener of Figure 1.
  • a Nietdorn 6 at which is pulled to form a closing head.
  • FIG. It is a punching screw with a fastener body 7, at one end of a screw head 8 is arranged. The underside of the screw head forms a contact shoulder 3 as in the previous fasteners.
  • Stamping section 9 is formed, which is bounded by an end face 5.
  • transition section 10 is formed, which has a concave curved side line in the example shown.
  • FIG. 5 shows the embodiment of FIG.
  • the cutting edge 24 has an arcuate shape in the side view.
  • the cutting edge is initially punctiform and then line-shaped on the edge to be machined. impinges on the workpiece.
  • an edge is formed, which is caused by the pinching of the tip.
  • the end face 5 is also convexly curved.
  • FIGS. 4 to 6 The configuration of the front end of the fastening element illustrated in FIGS. 4 to 6 can be present not only in fastening elements with a transition section, but also in a fastening element in which the piercing section has the same diameter as the body 1 of the fastening element. This applies, moreover, in most embodiments, but is shown here again in the drawing.
  • the figures 7 to 9. the same shape of both the end face and the cutting edge 24 is given as in the previous embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Insertion Pins And Rivets (AREA)
  • Connection Of Plates (AREA)
  • Adornments (AREA)

Abstract

The invention relates to a fastening element, which can be designed as a blind rivet or screw, and which can be driven into an unpunched workpiece. In the front region intended to be driven into the workpiece, said element contains a punching section (9) which has a cylindrical design and comprises a front end face (5) that runs obliquely to the longitudinal axis. The diameter of the punching section (9) can be smaller than the body of the fastening element, or the diameters can be the same. The intersection of the end face (5) with the outer face of the punching section forms a circumferential edge. Because of the oblique course of the end face, said circumferential edge is arranged such that the circumferential edge strikes the metal first at a front area when the fastening element is driven in. At said front area, the circumferential edge is designed as a cutting edge running in the circumferential direction. Upon impinging on the workpiece, said edge first generates a cut, which thereafter is increased in both circumferential directions.

Description

Beschreibung  description
Befestigungselement  fastener
Die Erfindung betrifft ein Befestigungselement, das in einer ruckartigen Bewegung in einen nicht gelochten Untergrund eingetrieben wird. The invention relates to a fastener which is driven in a jerky movement in a non-perforated underground.
Es ist bereits ein Schussniet bekannt, der mithilfe eines Schussgeräts in ein nicht gelochtes Werkstück eingetrieben wird. Dessen Nietdorn weist an seinem den Werkstücken zugewandten Ende eine Spitze auf, die auch pyramidenförmig ausgebildet sein kann (EP 1085952). Eine solche bei Schussnieten übliche Spitze erleichtert das Eindringen in das nicht gelochte Werkstück. There is already a Schussniet known which is driven by means of a firing device in a non-perforated workpiece. Whose rivet mandrel has at its end facing the workpieces on a tip, which may also be pyramid-shaped (EP 1085952). Such a tip, which is common in weft rivets, facilitates penetration into the non-perforated workpiece.
Es hat sich jedoch herausgestellt, dass bei bestimmten Anwendungsfäl- len die durch eine solche Spitze erzeugte Verformung des Werkstücks im Bereich der Befestigungsstelle zu ungeeigneten Ergebnissen führt. However, it has been found that in certain applications, the deformation of the workpiece produced by such a tip in the region of the attachment point leads to unsuitable results.
Der Erfindung liegt die Aufgabe zu Grunde, ein zum Eintreiben in ein nicht gelochtes Werkstück geeignetes Befestigungselement zu schaffen, das bei einfachem Aufbau zu einer geringeren Verformung des Werkstücks im Bereich der durch das Befestigungselement bewirkten Befestigung führt. The invention is based on the object to provide a suitable for driving into a non-perforated workpiece fastener that results in a simple construction to a lower deformation of the workpiece in the area caused by the fastener attachment.
Zur Lösung dieser Aufgabe schlägt die Erfindung ein Befestigungsele- ment mit den im Anspruch 1 genannten Merkmalen vor. Weiterbildungen der Erfindung sind Gegenstand von Unteransprüchen. To solve this problem, the invention proposes a fastening element with the features mentioned in claim 1. Further developments of the invention are the subject of dependent claims.
Das Befestigungselement enthält also im Bereich seines vorderen, den Werkstücken zugewandten Endes keine Spitze, sondern einen Stanzab- schnitt mit einer Stirnfläche, die von einer Umfangskante begrenzt ist. Diese Stirnfläche und damit auch die sie eingrenzende Umfangskante liegen nicht in einer Ebene, die quer zur Längsachse verläuft. Die Stirnfläche muss aber nicht eben sein, sie kann auch andere Formen aufwei- sen. Thus, in the area of its front end facing the workpieces, the fastening element does not contain a point, but rather a punched section with an end face delimited by a peripheral edge. This end face and thus also the peripheral edge bordering it are not located in a plane which runs transversely to the longitudinal axis. The face does not have to be flat, it can also have other shapes. sen.
Die Umfangskante ist mindestens im vorderen Bereich (Spitze) vorteilhaft symmetrisch um die Spitze als Schneidkante ausgebildet. The peripheral edge is advantageously formed at least in the front region (tip) symmetrically around the tip as a cutting edge.
Die Ausbildung nach der Erfindung führt dazu, dass die Stirnfläche zunächst an einer Stelle mit ihrer Schneidkante auf das Werkstück trifft, so dass dort die Öffnung des Werkstücks beginnt. Beim weiteren Eindringen des vorderen Bereichs des Stanzabschnitts kommen nach und nach alle Stellen der Schneidkante und danach der Rest der Umfangskante mit dem Werkstück in Berührung, so dass die Öffnung ähnlich wie bei einem Abscheren nach und nach erzeugt wird. Dies führt dazu, dass einerseits das Werkstück im Bereich der Öffnung weniger stark verformt wird und andererseits keine zu starke Abbremsung des Befestigung s- elements beim Eindringen bewirkt wird. Zusätzlich wird wegen des Abscherens eines Teils des Werkstücks ein Loch mit einem sauberen Rand erzeugt. Ein solcher sauberer Rand neigt nicht zum Einreißen, wie dies bei einem durch eine Spitze erzeugten Loch auftreten kann. Dies erweist sich insbesondere dann als vorteilhaft, wenn das Werkstück aus Gewebe, Kunststoff, Fasergewebe oder Verbundwerkstoffen besteht anstelle der üblicherweise verwendeten Metalle, insbesondere Stahl. The embodiment of the invention results in that the end face first meets the workpiece with its cutting edge at one point, so that the opening of the workpiece begins there. Upon further penetration of the front portion of the punching section, all points of the cutting edge and then the remainder of the peripheral edge gradually come into contact with the workpiece, so that the opening is generated gradually, similar to a shearing. As a result, on the one hand, the workpiece is less strongly deformed in the region of the opening and, on the other hand, no excessive braking of the fastening element during penetration is effected. Additionally, because of the shearing off of a part of the workpiece, a hole with a clean edge is created. Such a clean edge does not tend to tear, as may occur with a hole created by a tip. This proves to be particularly advantageous if the workpiece made of fabric, plastic, fiber fabric or composite materials instead of the metals commonly used, especially steel.
Damit auch unter erschwerten Bedingungen ein solches sauberes Loch gestanzt werden kann, kann erfindungsgemäß in Weiterbildung vorge- sehen sein, dass der vordere Stanzabschnitt des Befestigungselements eine zylindrische, insbesondere eine kreiszylindrische, Außenkontur aufweist. So that even under difficult conditions such a clean hole can be punched, it can be provided according to the invention in a further development that the front punching section of the fastening element has a cylindrical, in particular a circular cylindrical, outer contour.
In nochmaliger Weiterbildung der Erfindung kann vorgesehen sein, dass die Stanzkante von einer Schnittlinie zwischen der Stirnfläche des Befestigungselements und einer zylindrischen Außenkontur des Befestigungselements gebildet wird, vorzugsweise von der zylindrischen Außenkontur des Stanzabschnitts. In nochmaliger Weiterbildung der Erfindung kann vorgesehen sein, dass der Stanzabschnitt einen kleineren Querschnitt aufweist als der eigentliche Körper des Befestigungselements. Es hat sich herausgestellt, dass das Bilden eines Lochs mit einem kleineren Querschnitt als es dem Querschnitt des Befestigungselements entspricht, zu guten Ergebnissen sowohl bei der Ausgestaltung der Befestigung führt als auch dazu, dass der Aufwand zum Einschießen eines solchen Befestigungselements nicht zu groß wird. In a further development of the invention can be provided that the punching edge is formed by a cutting line between the end face of the fastener and a cylindrical outer contour of the fastener, preferably from the cylindrical outer contour of the punching section. In a further development of the invention it can be provided that the punching section has a smaller cross section than the actual body of the fastening element. It has been found that forming a hole having a smaller cross-section than the cross-section of the fastener, results in good results in both the design of the fastener and the expense of shooting such a fastener is not too great.
Um dies zu erreichen, kann erfindungsgemäß vorgesehen sein, dass zwischen dem vorderen Stanzabschnitt und dem Befestigungselementkörper ein Übergangsabschnitt angeordnet und ausgebildet ist, der den Übergang zwischen dem größeren Querschnitt und dem kleineren Querschnitt herstellt. To achieve this, it can be provided according to the invention that a transition section is arranged and formed between the front punching section and the fastening element body, which produces the transition between the larger cross section and the smaller cross section.
Dieser Übergangsabschnitt kann nun verschiedene Formen aufweisen. Beispielsweise kann der Übergangsabschnitt konisch verlaufen, das heißt mit einer geradlinig verlaufenden Seitenlinie. This transition section can now have different shapes. For example, the transition section can be conical, that is, with a straight-line side line.
Es ist ebenfalls möglich und wird von der Erfindung vorgeschlagen, dass der Übergangsabschnitt ballistisch verläuft, die Seitenlinie also konvex gekrümmt ist. Eine weitere von der Erfindung vorgeschlagene Möglichkeit liegt darin, dass der Übergangsabschnitt eine konkav gekrümmte Seitenlinie aufweist. It is also possible and is proposed by the invention that the transition section is ballistic, the side line is thus convexly curved. Another possibility proposed by the invention is that the transition section has a concavely curved side line.
Insbesondere kann auch vorgesehen sein, dass die Seitenlinie des Übergangsabschnitts sich aus Abschnitten unterschiedlicher Konfiguration zusammensetzt, also ballistischen, kegeligen und konkaven Abschnitten. Es wurde bereits erwähnt, dass der schräge Verlauf der Stirnfläche dazu führen soll, dass die das Herstellen des Lochs bewirkende Umfangskante nach und nach beziehungsweise zu unterschiedlichen Zeiten auf dem Werkstück auftrifft. Dadurch soll zunächst der die Schneidkante bil- dende Teil der Umfangskante einen Schneidvorgang und anschließend der Rest der Umfangskante einen Schervorgang durchführen. Dies kann dadurch in Weiterbildung verbessert werden, dass die Stirnfläche des Stanzabschnitts im Bereich unmittelbar radial hinter der Schneidkante einen kleineren Winkel mit der Längsachse des Befestigungselements einnimmt als in ihrem restlichen Bereich. Damit wird die Schneidkante schärfer. Beispielsweise kann dies dadurch geschehen, dass die Stirnfläche konkav ausgebildet ist. In particular, it can also be provided that the side line of the transition section is composed of sections of different configuration, ie ballistic, conical and concave sections. It has already been mentioned that the oblique course of the end face is intended to cause the peripheral edge which effects the production of the hole to impinge on the workpiece step by step or at different times. As a result, first the part of the peripheral edge forming the cutting edge is to carry out a cutting operation and then the remainder of the peripheral edge to make a shearing operation. This can be improved in a further development that the end face of the punching section occupies a smaller angle with the longitudinal axis of the fastening element in the area immediately radially behind the cutting edge than in its remaining area. This will sharpen the cutting edge. For example, this can be done by the end face is concave.
Insbesondere kann vorgesehen sein, dass der vordere Bereich des Stanzabschnitts mit der Stirnfläche und der Schneidkante aus Edelstahl hergestellt ist, vorzugsweise durch eine Kaltverformung, ein so genanntes Kneifen. In particular, it can be provided that the front region of the stamped portion is made with the end face and the cutting edge of stainless steel, preferably by a cold deformation, a so-called pinching.
Weitere Merkmale, Einzelheiten und Vorzüge der Erfindung ergeben sich aus den Ansprüchen und der Zusammenfassung, deren beiderFurther features, details and advantages of the invention will become apparent from the claims and the abstract, both
Wortlaut durch Bezugnahme zum Inhalt der Beschreibung gemacht wird, der folgenden Beschreibung bevorzugter Ausführungsformen der Erfindung sowie anhand der Zeichnung. Hierbei zeigen: Figur 1 die Seitenansicht eines Befestigungselements in Form eines Wording is made by reference to the content of the description, the following description of preferred embodiments of the invention and from the drawing. 1 shows the side view of a fastening element in the form of a
Hohlniets; die Seitenansicht eines Befestigungselements in Form eines Dornbruchniets; die Seitenansicht eines Befestigungselements in Form einer Stanzschraube; eine der Figur 1 entsprechende Seitenansicht des vorderen Teils eines Befestigungselements; eine Seitenansicht aus einer um 90° versetzten Richtung; eine perspektivische Ansicht der Ausführungsform der Figur 4 und 5; eine der Figur 4 entsprechende Darstellung einer nochmals weiteren Ausführungsform; die Ansicht der Ausführungsform der Figur 7 aus einer um 90° versetzten Richtung; eine perspektivische Darstellung der Ausführungsform nach Figur 7 und Figur 8. hollow rivet; the side view of a fastener in the form of a Dornbruchniets; the side view of a fastener in the form of a punching screw; one of Figure 1 corresponding side view of the front part of a fastener; a side view of a 90 ° offset direction; a perspective view of the embodiment of Figures 4 and 5; a representation corresponding to Figure 4 of yet another embodiment; the view of the embodiment of Figure 7 from a 90 ° offset direction; a perspective view of the embodiment of Figure 7 and Figure 8.
Figur 1 zeigt als Beispiel für ein von der Erfindung vorgeschlagenes Befestigungselement einen Hohlniet mit einem Körper 1 , an dessen einem Ende ein Kopf 2 ausgebildet ist. Der Kopf 2 steht radial über den zylindrischen Körper 1 des Befestigungselements vor. Seine Unterseite bildet eine Anlageschulter 3, die in befestigtem Zustand auf der Oberseite des Werkstücks zur Anlage kommt. Im Bereich seines dem Werkstück zugeordneten vorderen Endes 4 weist das Befestigungselement eine Stirn- fläche 5 auf, die hier nur angedeutet ist. FIG. 1 shows, as an example of a fastening element proposed by the invention, a tubular rivet with a body 1, at one end of which a head 2 is formed. The head 2 projects radially beyond the cylindrical body 1 of the fastener. Its underside forms an abutment shoulder 3, which comes to rest in a fastened state on the upper side of the workpiece. In the region of its front end 4 assigned to the workpiece, the fastening element has an end face 5, which is only indicated here.
Ein zweites Beispiel für die Art von Befestigungselement, bei dem die Erfindung Anwendung finden kann, ist in Figur 2 dargestellt. Es handelt sich um einen Dornbruchniet, dessen Körper 1 genauso aussieht wie der Körper 1 des Befestigungselements der Figur 1. In dem Körper 1 des Dornbruchniets steckt ein Nietdorn 6, an dem zur Bildung eines Schließkopfs gezogen wird. Ein drittes Beispiel für ein Befestigungselement, an dem die Erfindung verwirklicht werden kann, ist in Figur 3 dargestellt. Es handelt sich um eine Stanzschraube mit einem Befestigungselementkörper 7, an dessen einem Ende ein Schraubenkopf 8 angeordnet ist. Die Unterseite des Schrauben köpf s bildet eine Anlageschulter 3 wie bei den vorhergehenden Befestigungselementen. A second example of the type of fastener to which the invention may find application is shown in FIG. It is a Dornbruchniet whose body 1 looks the same as the body 1 of the fastener of Figure 1. In the body 1 of the Dornbruchniets a Nietdorn 6, at which is pulled to form a closing head. A third example of a fastener on which the invention can be implemented is shown in FIG. It is a punching screw with a fastener body 7, at one end of a screw head 8 is arranged. The underside of the screw head forms a contact shoulder 3 as in the previous fasteners.
In dem Bereich des vorderen Endes, also des dem Schraubenkopf 8 abgewandten Endes des Befestigungselements der Figur 3, ist ein In the region of the front end, that is, the end facing away from the screw head 8 of the fastener of Figure 3, is a
Stanzabschnitt 9 gebildet, der von einer Stirnfläche 5 begrenzt wird. Stamping section 9 is formed, which is bounded by an end face 5.
Zwischen dem zylindrischen Körper 7 des Befestigungselements und dem ebenfalls zylindrischen Stanzabschnitt 9 ist ein Übergangsabschnitt 10 ausgebildet, der im dargestellten Beispiel eine konkav gekrümmte Seitenlinie aufweist. Between the cylindrical body 7 of the fastening element and the likewise cylindrical punching section 9, a transition section 10 is formed, which has a concave curved side line in the example shown.
In den vereinfachten Darstellungen der Figuren 1 - 3 sind die vordere Stirnfläche 5 und die Schneidkante 24 nur schematisch dargestellt. Aus den folgenden Figuren geht die Schneidkante 24 deutlicher hervor. Der zylindrische Stanzabschnitt 9 weist eine Umfangskante 41 auf. Diese Umfangskante 41 begrenzt die Stirnfläche 5. An der Stelle, wo die Stirnfläche 5 am weitesten nach vorne ragt, also den größten Abstand von der Unterseite des Kopfs 2 des Befestigungselements aufweist, ist die Schneidkante 24 gebildet. Diese Schneidkante verläuft natürlich, da sie von einem Abschnitt der Umfangskante 41 gebildet wird, in Umfangs- richtung. Die Stirnfläche unmittelbar hinter der Schneidkante 24 ist in der Seitenansicht der Figur 4 konkav ausgebildet. Dadurch wird die Schneidkante 24 schärfer als es bei einer ebenen Stirnfläche 5 der Fall wäre. Die Figur 5 zeigt die Ausführungsform der Figur 4 von links in Figur 4. Hier ist zu sehen, dass die Schneidkante 24 in der Seitenansicht eine Bogenform aufweist. Es wird auch hier dafür gesorgt, dass die Schneidkante zunächst fast punktförmig und dann linienförmig auf dem zu bear- beitenden Werkstück auftrifft. Zusätzlich ist in der Mitte der Stirnfläche 5 noch eine Kante gebildet, die durch das Kneifen der Spitze entstanden ist. Aus der Figur 5 und der Figur 6 kann man in Zusammenschau entnehmen, dass in einer Querrichtung, also quer zur Darstellung der Figur 4, die Stirnfläche 5 auch konvex gekrümmt ist. Für das Herausbilden der Schneidkante 24 im Bereich des vorderen Endes des Stanzabschnitts 9 ist aber die konkave Form der Figur 4 maßgebend. In the simplified representations of FIGS. 1-3, the front end face 5 and the cutting edge 24 are shown only schematically. From the following figures, the cutting edge 24 is clearer. The cylindrical punching section 9 has a peripheral edge 41. This peripheral edge 41 bounds the end face 5. At the point where the end face 5 protrudes furthest forward, so has the greatest distance from the bottom of the head 2 of the fastener, the cutting edge 24 is formed. This cutting edge, of course, since it is formed by a portion of the peripheral edge 41, in the circumferential direction. The end face immediately behind the cutting edge 24 is concave in the side view of Figure 4. As a result, the cutting edge 24 is sharper than would be the case with a flat end face 5. FIG. 5 shows the embodiment of FIG. 4 from the left in FIG. 4. Here it can be seen that the cutting edge 24 has an arcuate shape in the side view. Here again, it is ensured that the cutting edge is initially punctiform and then line-shaped on the edge to be machined. impinges on the workpiece. In addition, in the middle of the end face 5, an edge is formed, which is caused by the pinching of the tip. From FIG. 5 and FIG. 6 it can be seen in summary that in a transverse direction, that is transversely to the illustration of FIG. 4, the end face 5 is also convexly curved. For the formation of the cutting edge 24 in the region of the front end of the punching section 9 but the concave shape of Figure 4 is authoritative.
Die in Figur 4 bis 6 dargestellte Gestaltung des vorderen Endes des Befestigungselementes kann nicht nur bei Befestigungselementen mit einem Übergangsabschnitt vorhanden sein, sondern auch bei einem Befestigungselement, bei dem der Stanzabschnitt den gleichen Durchmes- ser aufweist wie der Körper 1 des Befestigungselements. Dies gilt im übrigen bei den meisten Ausführungsformen, wird aber hier nochmals zeichnerisch dargestellt. Hierzu dienen die Figuren 7 bis 9. Hier ist die gleiche Form sowohl der Stirnfläche als auch der Schneidkante 24 gegeben wie bei der vorhergehenden Ausführungsform. The configuration of the front end of the fastening element illustrated in FIGS. 4 to 6 can be present not only in fastening elements with a transition section, but also in a fastening element in which the piercing section has the same diameter as the body 1 of the fastening element. This applies, moreover, in most embodiments, but is shown here again in the drawing. Here are the figures 7 to 9. Here, the same shape of both the end face and the cutting edge 24 is given as in the previous embodiment.
Beim Auftreffen des Stanzabschnitts 9 auf dem zu bearbeitenden Werkstück wird also zunächst ein Schnitt in Umfangsrichtung mithilfe der Schneidkante 24 erzeugt, der dann in beide Umfangsrichtungen durch die dann als Stanzkante wirkende Umfangskante 41 weitergeführt wird. Upon impact of the punching section 9 on the workpiece to be machined, therefore, a cut is first generated in the circumferential direction by means of the cutting edge 24, which is then continued in both circumferential directions by the circumferential edge 41, which then acts as a punching edge.

Claims

Patentansprüche claims
1. Befestigungselement zum Einschießen, mit 1. fastener for shooting, with
1.1 einem Befestigungselementkörper (1 , 7), der  1.1 a fastener body (1, 7), the
1.2 einen Kopf (2, 8) mit einer Anlageschulter (3) an seiner Unterseite aufweist, und  1.2 has a head (2, 8) with a contact shoulder (3) on its underside, and
1.3 einem das vordere Ende des Befestigungselements bildenden Stanzabschnitt (9), der  1.3 a forming the front end of the fastener punching section (9), the
1.4 eine von einer Umfangskante (41 ) begrenzte Stirnfläche (15) aufweist, die  1.4 one of a peripheral edge (41) limited end face (15), the
1.5 nicht in einer senkrecht zur Längsachse des Befestigugselements verlaufenden Querebene liegt, wobei  1.5 does not lie in a plane perpendicular to the longitudinal axis of the Befestigungsigugselements transverse plane, wherein
1.6 die Umfangskante (41 ) mindestens in ihrem vorderen, den größten Abstand von der Anlageschulter (3) des Kopfs (2, 8) aufweisenden Bereich als Schneidkante (24) ausgebildet ist.  1.6 the peripheral edge (41) at least in its front, the greatest distance from the abutment shoulder (3) of the head (2, 8) having area as a cutting edge (24) is formed.
2. Befestigungselement nach Anspruch 1 , bei dem der Stanzabschnitt (9) eine zylindrische, insbesondere kreiszylindrische, Außenkontur aufweist. 2. Fastening element according to claim 1, wherein the punched portion (9) has a cylindrical, in particular circular cylindrical, outer contour.
3. Befestigungselement nach Anspruch 1 oder Anspruch 2, bei dem die Umfangskante ( 41 ) von einer Schnittlinie zwischen der Stirnfläche (15) und einer zylindrischen Außenkontur des Befestigungselements gebildet wird, vorzugsweise der zylindrischen Außenkontur des Stanzabschnitts (9). 3. Fastening element according to claim 1 or claim 2, wherein the peripheral edge (41) of a cutting line between the end face (15) and a cylindrical outer contour of the fastener is formed, preferably the cylindrical outer contour of the punching section (9).
4. Befestigungselement nach einem der vorhergehenden Ansprüche, mit 4. Fastening element according to one of the preceding claims, with
4.1 einem zwischen dem vorderen Stanzabschnitt (9) und dem Befestigungselementkörper (1 , 7) angeordneten Übergangsabschnitt (10), wobei  4.1 a between the front punching section (9) and the fastener body (1, 7) arranged transition portion (10), wherein
4.2 der Querschnitt des Stanzabschnitts (9) kleiner ist als der Querschnitt des Befestigungselementkörpers (1 , 7). 4.2, the cross section of the punching section (9) is smaller than the cross section of the fastener body (1, 7).
5. Befestigungselement nach Anspruch 4, bei dem der Übergangsabschnitt (10) mindestens teilweise konisch oder konkav verläuft. 5. Fastening element according to claim 4, wherein the transition portion (10) extends at least partially conical or concave.
6. Befestigungselement nach Anspruch 4 oder 5, bei dem der 6. Fastening element according to claim 4 or 5, wherein the
Übergangsabschnitt (10) mindestens teilweise ballistisch ausgebildet ist.  Transition portion (10) is formed at least partially ballistic.
7. Befestigungselement nach einem der vorhergehenden Ansprüche, bei dem die Umfangskante zu mindestens 10 %, vorzugsweise 20 %, mindestens zu 30 %, mindestens 40 % oder zu mindestens 50 % als Schneidkante ausgebildet ist, insbesondere symmetrisch um eine Spitze der Stanzabschnitts. 7. Fastening element according to one of the preceding claims, wherein the peripheral edge is formed to at least 10%, preferably 20%, at least 30%, at least 40% or at least 50% as a cutting edge, in particular symmetrically about a tip of the punching section.
8. Befestigungselement nach einem der vorhergehenden Ansprüche, bei dem die Stirnfläche (5, 15) im Bereich unmittelbar hinter der Schneidkante (24) zur Verkleinerung des Winkels der 8. Fastening element according to one of the preceding claims, wherein the end face (5, 15) in the region immediately behind the cutting edge (24) for reducing the angle of the
Schneidkante (24) einen kleineren Winkel mit der Längsachse des Befestigungselements einnimmt als in ihrem restlichen Bereich.  Cutting edge (24) occupies a smaller angle with the longitudinal axis of the fastener than in its remaining area.
9. Befestigungselement nach einem der vorhergehenden Ansprüche, bei dem der vordere Bereich des Stanzabschnitts (9) mit der Stirnfläche (5, 15) und der Schneidkante (24) durch Kneifen hergestellt ist. 9. Fastening element according to one of the preceding claims, wherein the front portion of the punching portion (9) with the end face (5, 15) and the cutting edge (24) is made by pinching.
10. Befestigungselement nach einem der vorhergehenden Ansprüche, bei dem mindestens der Stanzabschnitt (9) aus insbesondere kaltverfestigtem Edelstahl besteht. 10. Fastening element according to one of the preceding claims, wherein at least the punching section (9) consists in particular cold-strengthened stainless steel.
1 1. Befestigungselement nach einem der vorhergehenden Ansprüche, bei dem der Befestigungselementkörper als Schraube oder als Nietkörper ausgebildet ist. 1 1. Fastening element according to one of the preceding claims, wherein the fastener body is designed as a screw or as a rivet body.
12. Befestigungselement nach einem der vorhergehenden Ansprüche, bei dem die Schneidkante entlang des Umfangs oder polygonal verläuft. 12. Fastening element according to one of the preceding claims, wherein the cutting edge extends along the circumference or polygonal.
EP11748376.8A 2010-08-24 2011-08-23 Fastening element Withdrawn EP2609341A1 (en)

Applications Claiming Priority (2)

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DE102010039669A DE102010039669A1 (en) 2010-08-24 2010-08-24 fastener
PCT/EP2011/064475 WO2012025529A1 (en) 2010-08-24 2011-08-23 Fastening element

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EP2609341A1 true EP2609341A1 (en) 2013-07-03

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US (1) US20130142591A1 (en)
EP (1) EP2609341A1 (en)
JP (1) JP2013536385A (en)
KR (1) KR20130057462A (en)
CN (1) CN103403368A (en)
AU (1) AU2011295106A1 (en)
BR (1) BR112013004290A2 (en)
CA (1) CA2808249A1 (en)
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RU2013108740A (en) 2014-09-27
US20130142591A1 (en) 2013-06-06
JP2013536385A (en) 2013-09-19
KR20130057462A (en) 2013-05-31
CN103403368A (en) 2013-11-20
MX2013002066A (en) 2013-07-29
WO2012025529A1 (en) 2012-03-01
AU2011295106A1 (en) 2013-03-21
DE102010039669A1 (en) 2012-03-01
CA2808249A1 (en) 2012-03-01
BR112013004290A2 (en) 2016-05-31

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