EP0513473A1 - Device for joining metal sheets together - Google Patents

Device for joining metal sheets together Download PDF

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Publication number
EP0513473A1
EP0513473A1 EP92101047A EP92101047A EP0513473A1 EP 0513473 A1 EP0513473 A1 EP 0513473A1 EP 92101047 A EP92101047 A EP 92101047A EP 92101047 A EP92101047 A EP 92101047A EP 0513473 A1 EP0513473 A1 EP 0513473A1
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EP
European Patent Office
Prior art keywords
die
anvil
cutting parts
cutting
contour
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.)
Granted
Application number
EP92101047A
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German (de)
French (fr)
Other versions
EP0513473B1 (en
Inventor
Gerd-Jürgen Eckold
Hans Maass
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.)
ECKOLD, GERD-JUERGEN
Maass Hans
Eckold GmbH and Co KG
Original Assignee
Eckold Gerd-Juergen
Maass Hans
Eckold GmbH and Co KG
Walter Eckold GmbH and Co KG Vorrichtungs und Geraetebau
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Application filed by Eckold Gerd-Juergen, Maass Hans, Eckold GmbH and Co KG, Walter Eckold GmbH and Co KG Vorrichtungs und Geraetebau filed Critical Eckold Gerd-Juergen
Publication of EP0513473A1 publication Critical patent/EP0513473A1/en
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Publication of EP0513473B1 publication Critical patent/EP0513473B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
    • B21D39/031—Joining superposed plates by locally deforming without slitting or piercing
    • 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
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49833—Punching, piercing or reaming part by surface of second part
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53709—Overedge assembling means
    • Y10T29/5377—Riveter
    • 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
    • Y10T29/53996—Means to assemble or disassemble by deforming

Definitions

  • the joining tools are "open" in the direction parallel to the cuts.
  • clinching tools have also become known in which the die has a closed contour and the punch has a contour which is smaller than this, in such a way that none of the metal sheets to be joined is cut and a fluid-tight joining point is thus created.
  • Such a device is disclosed for example in DE-OS 31 06 313, Fig. 7/8.
  • the die contour is limited by its cutting parts, which are articulated on a base.
  • these tools require a relatively large amount of space, which is often not available in practice.
  • the object of the invention is to provide a joining device of the type specified in the preamble of claim 1, in which an easy to manufacture, little protruding die is made possible and the non-rotatable joining points in the direction parallel to the surfaces of the workpieces have essentially the same tensile strength in all directions can have despite oval shape.
  • the latter circumstance is important for the sheet metal designer, because he then does not have to adapt the clamping direction of the joining tools to the load of the later workpiece.
  • the cutting parts can be produced as simple stamped parts.
  • the cutting contour is then delimited by its end faces on the one hand, by the edge of a recess made in the anvil on the other hand, which can also be produced with little effort.
  • the limitation in the anvil causes the material to spread in a targeted manner in the direction of the resilient cutting parts. This reduces the depth of penetration of the punch and the pressure required to create a joining point.
  • the contour of the stamp and the die can be designed in such a way that the joining point on the die side results in a clearly offset oval, but on the die side at least approximately as a circular projection.
  • the cutting parts can be provided with suitable coatings to increase the service life and to prevent welding.
  • the die consists of a central anvil 18 with a recess 20, at the bottom of which the work surface 22 is located, and two cutting parts 24, which here have the shape of strong leaf springs.
  • the sheet is pushed through by the punch into the die recess, delimited by the cutting parts 24 and the anvil sections 26 on both sides of the recess 20, and when the throughput is stopped by the working surface 22 of the anvil, the material passed through flows laterally , because the cutting parts can be deflected elastically.
  • the stamp contour is oval, as can be seen in FIG. 3, and the die recess is also approximately oval (cf. FIG. 8).
  • the stamp contour is set back in relation to the die contour in such a way that neither of the two sheets is cut through when joining, and unequal in the two planes defined by the sectional planes of FIGS. 1 and 2:
  • the dimension "A” is significantly larger than the dimension "B”, and this also affects the cross-sectional shape of the finished joint connection, as shown in FIGS. 5 and 6.
  • significantly thicker material thicknesses of the penetration remain than in the extruded area of the level 6-6, the dimensions A and B and the working angle "C" of the stamp being matched to one another in such a way that the tensile strength of the joint connection is parallel in the direction to the sheets is at least approximately the same.
  • the joining point is aesthetically satisfactory when viewed from both sheet metal sides.
  • FIGS. 1 and 2 The representation according to FIGS. 1 and 2 is largely schematic in order to explain the essentials for the invention.
  • a die designed in this way would have two major disadvantages: on the one hand, a compromise in terms of strength and elasticity must be found for the cutting parts; on the other hand, it cannot be ruled out that shaved parts of the workpieces get into the gap between the anvil and cutting parts and the latter continuously spread, which of course affects the joining work.
  • the cutting parts are each deflectably supported on a cutting edge 30 of a base 32 and are held in contact with the anvil 18 by leaf springs 34.
  • the cutting parts can therefore be made of very hard material, while the leaf springs ensure almost unimpeded springing open during the material spreading phase.
  • the bearings of the cutting parts are designed with an arc-shaped support facing the punch, so that any dirt falls down from the storage area.
  • the anvil is drawn in below its working area, so that there are collecting spaces 36 for chips or other dirt; these collecting spaces are located below the bearing 30.
  • Anvil, base and leaf springs can be connected to one another by means of a hollow rivet or the like, only the axis 38 of such a connecting element being indicated in FIG. 7.
  • the chip formation can be significantly reduced or even completely prevented if the edges 46 of the anvil 'and the edges 48 of the cutting parts are not sharp-edged, but are rounded off.
  • FIG. 9 shows a form of the stamp in which the depth of penetration of the stamp is limited by a collar 50 which sits on the top of the stamp-side sheet. This design is recommended for thin, soft sheets to prevent the displaced material from rising.
  • the press used then does not need to have a stroke limitation, but only a force limitation, which is easier with e.g. hydraulic drives.

Abstract

The invention relates to a device for joining metal sheets together, comprising a punch (10) and a die (11) with elastically deflectable cutting-edge parts (24). The dimensions of the punch, on the one hand, and of a closed contour of the die (11), on the other hand, define a joining region, such that none of the sheets is cut through and the joint has essentially isotropic tensile strength in all directions parallel to the sheets. The joint is also aesthetically pleasing on both sides. <IMAGE>

Description

Das Verbinden von Blechteilen mittels Durchsetzfügen ist in DIN 85934.-5.2.11. definiert. Die zu fügenden Bleche werden längs zweier paralleler begrenzter Linien durch einen mit einer Matrize zusammenwirkenden Stempel eingeschnitten, auf die Matrizenseite durchgedrückt und auf dieser durch Kaltfluß gebreitet, so daß eine Art Nietkopf entsteht Beim Breiten des Materials weichen die Matrizenschneiden elastisch aus. Die Festigkeit der Verbindung ist in Richtung quer zu den Schneidlinien größer als in Richtung senkrecht dazu. Vorrichtungen zur Durchführung solcher Fügeverfahren sind in der EP-A-77 932 offenbart.The joining of sheet metal parts by means of clinching is described in DIN 85934.-5.2.11. Are defined. The metal sheets to be joined are cut along two parallel, delimited lines by a stamp interacting with a die, pressed through to the die side and spread on it by cold flow, so that a kind of rivet head is created. When the material is spread out, the die edges dodge elastically. The strength of the connection is greater in the direction transverse to the cutting lines than in the direction perpendicular thereto. Devices for carrying out such joining processes are disclosed in EP-A-77 932.

Bei diesen bekannten Vorrichtungen sind die Fügewerkzeuge in Richtung parallel zu den Schnitten "offen". Es sind jedoch auch schon Durchsetzfügewerkzeuge bekanntgeworden, bei denen die Matrize eine geschlossene Kontur aufweist und der Stempel eine dieser gegenüber verkleinerte Kontur besitzt, derart, daß keines der zu fügenden Bleche eingeschnitten wird und so ein fluiddichter Fügepunkt entsteht. Eine solche Vorrichtung ist beispielsweise in der DE-OS 31 06 313, Fig. 7/8, offenbart. Die Matrizenkontur wird dabei von deren Schneidenteilen begrenzt, die gelenkig an einem Sockel abgestützt sind. Diese Werkzeuge benötigen jedoch relativ viel Platz, der in der Praxis oft nicht zur Verfügung steht.In these known devices, the joining tools are "open" in the direction parallel to the cuts. However, clinching tools have also become known in which the die has a closed contour and the punch has a contour which is smaller than this, in such a way that none of the metal sheets to be joined is cut and a fluid-tight joining point is thus created. Such a device is disclosed for example in DE-OS 31 06 313, Fig. 7/8. The die contour is limited by its cutting parts, which are articulated on a base. However, these tools require a relatively large amount of space, which is often not available in practice.

Aufgabe der Erfindung ist es, eine Fügevorrichtung der im Oberbegriff des Patentanspruchs 1 angegebenen Gattung zu schaffen, bei der eine einfach herstellbare, wenig ausladende Matrize ermöglicht wird und die herstellbaren verdrehsicheren Fügepunkte in Richtung parallel zu den Flächen der Werkstücke im wesentlichen gleiche Zugfestigkeit in allen Richtungen trotz ovaler Form aufweisen Können. Der letztere Umstand ist wichtig für den Blechkonstrukteur, weil dieser dann die Einspannrichtung der Fügewerkzeuge nicht auf die Belastung des späteren Werkstücks abzustimmen braucht.The object of the invention is to provide a joining device of the type specified in the preamble of claim 1, in which an easy to manufacture, little protruding die is made possible and the non-rotatable joining points in the direction parallel to the surfaces of the workpieces have essentially the same tensile strength in all directions can have despite oval shape. The latter circumstance is important for the sheet metal designer, because he then does not have to adapt the clamping direction of the joining tools to the load of the later workpiece.

Gemäß der Erfindung wird mit Vorteil von der Lehre der eingangs genannten EP-A Gebrauch gemacht, indem die Schneidenteile als einfache Stanzteile hergestellt werden können. Die Schneidenkontur wird dann von deren Endflächen einerseits, von dem Rand einer in den Amboß eingebrachten Ausnehmung andererseits begrenzt, die sich ebenfalls mit geringem Aufwand herstellen läßt. Die Begrenzung im Amboß bewirkt, daß sich der Werkstoff gezielt in Richtung der federnden Schneidenteile ausbreitet. Hierdurch wird die erforderliche Eindringtiefe des Stempels und die benötigte Druckkraft zur Erzeugung eines Fügepunktes verringert.According to the invention, use is advantageously made of the teaching of the aforementioned EP-A in that the cutting parts can be produced as simple stamped parts. The cutting contour is then delimited by its end faces on the one hand, by the edge of a recess made in the anvil on the other hand, which can also be produced with little effort. The limitation in the anvil causes the material to spread in a targeted manner in the direction of the resilient cutting parts. This reduces the depth of penetration of the punch and the pressure required to create a joining point.

In vielen Anwendungsfällen, etwa bei Haushaltsgeräten, Fahrzeugen usw. sind solche Fügepunkte für den Benutzer sichtbar, und es ist erwünscht, daß diese ein ansprechendes Aussehen haben, insbesondere kreisrund nach Art eines Nietkopfes sind. In Weiterbildung der Erfindung kann man die Kontur des Stempels und der Matrize derart auslegen, daß der Fügepunkt sich auf der Stempelseite als klar abgesetztes Oval, auf der Matrizenseite jedoch mindestens annähernd als kreisrunder Vorsprung ergibt. Die Schneidenteile können zur Erhöhung der Standzeit, und um Aufschweißungen zu verhindern, mit geeigneten Beschichtungen versehen werden.In many applications, for example in household appliances, vehicles, etc., such joining points are visible to the user, and it is desirable that they have an appealing appearance, in particular circular in the manner of a rivet head. In a further development of the invention, the contour of the stamp and the die can be designed in such a way that the joining point on the die side results in a clearly offset oval, but on the die side at least approximately as a circular projection. The cutting parts can be provided with suitable coatings to increase the service life and to prevent welding.

Es ist besonders vorteilhaft, wenn man die Funktionen "Schneiden" und "elastisch auslenken" der Schneidenteile derart voneinander trennt, daß die Schneidenteile selbst nicht verformbar sind, sondern von Blattfedern gegen den Amboß vorgespannt werden. Man kann dann für die Schneidenteile ein hochfestes Material verwenden, das das Fügen auch harter Bleche, etwa aus Edelstahl, ermöglicht. Andererseits kann man die Blattfedern aber so weich wählen, daß die Schneidenteile auch schon bei geringer Belastung ausweichen; dies ermöglicht das Fügen dünner Bleche aus weichem Material, etwa Aluminium. So kann man mit der Vorrichtung gemäß der Erfindung Bleche aus Aluminium mit einer Dicke von je 0,2 mm einwandfrei fügen, was mit den vorbekannten Vorrichtungen nicht möglich ist.It is particularly advantageous if the functions "cutting" and "elastically deflecting" of the cutting parts are separated from one another in such a way that the cutting parts themselves are not deformable, but rather are biased against the anvil by leaf springs. A high-strength material can then be used for the cutting parts, which also enables the joining of hard metal sheets, such as stainless steel. On the other hand, you can choose the leaf springs so soft that the cutting parts dodge even at low loads; this enables the joining of thin sheets of soft material, such as aluminum. Thus, with the device according to the invention, aluminum sheets with a thickness of 0.2 mm each can be properly joined, which is not possible with the previously known devices.

Es ist auch vorteilhaft, die Schneidenteile auf offenen Schneidenlagern eines Sockels abzustützen und unterhalb dieser Lager Auffangräume für bei der Fügearbeit entstehenden Abrieb, Fett und dergleichen vorzusehen.It is also advantageous to support the cutting parts on open cutting edge bearings of a base and to provide collecting spaces below these bearings for abrasion, grease and the like which arise during the joining work.

Schließlich ist es vorteilhaft, die matrizenseitigen Schneiden abzurunden, wodurch die mögliche Spanbildung minimal gemacht wird.Finally, it is advantageous to round off the cutting edges on the die side, thereby minimizing the possible chip formation.

Ausführungsbeispiele der Erfindung werden nachstehend unter Bezugnahme auf die beigefügten Zeichnungen näher erläutert.

  • Fig. 1 stellt im Längsschnitt die Funktionsbereiche von Stempel und Matrize einer ersten Ausführungsform dar,
  • Fig. 2 ist ein Schnitt nach Linie 2-2 der Fig. 1, und in dieser Figur ist auch die Schnittebene der Fig. 1 eingezeichnet,
  • Fig. 3 zeigt in Draufsicht die Stempelseite einer fertigen Fügung,
  • Fig. 4 zeigt entsprechend die Matrizenseite,
  • Fig. 5 bzw. 6 sind Schnitte nach Linie 5-5 bzw. 6-6 der Fig. 3, jedoch dieser gegenüber erheblich vergrößert,
  • Fig. 7 zeigt analog Fig. 2 eine Matrize in einer zweiten Ausführungsform, und
  • Fig. 8 stellt perspektivisch und weggebrochen in Explosionsform den Amboß, ein Schneidenteil und eine Blattfeder der Matrize nach Fig. 7 dar, während
  • Fig. 9 eine alternative Form des Stempels in zu Fig. 1 analoger Seitenansicht zeigt.
Embodiments of the invention are explained in more detail below with reference to the accompanying drawings.
  • 1 shows in longitudinal section the functional areas of the punch and die of a first embodiment,
  • 2 is a section along line 2-2 of FIG. 1, and the sectional plane of FIG. 1 is also shown in this figure,
  • 3 shows a top view of the stamp side of a finished joint,
  • 4 shows the die side accordingly,
  • 5 and 6 are sections along line 5-5 or 6-6 of FIG. 3, but significantly enlarged compared to this,
  • 7 shows, analogously to FIG. 2, a die in a second embodiment, and
  • Fig. 8 shows in perspective and broken away in an exploded form the anvil, a cutting part and a leaf spring of the die of Fig. 7, while
  • FIG. 9 shows an alternative form of the stamp in a side view analogous to FIG. 1.

Der in Fig. 1 und 2 weggebrochen dargestellte Werkzeugsatz, bestehend aus Stempel 10 und Matrize 12, wird in irgendeine Preßvorrichtung (nicht dargestellt) eingespannt und in Richtung der Pfeile 14 bewegt, um zwei oder mehr zwischen Stempel und Matrize gelegte Bleche 16 zu fügen. Die Matrize besteht aus einem zentralen Amboß 18 mit einer Ausnehmung 20, an deren Grund sich die Arbeitsfläche 22 befindet, und zwei Schneidenteilen 24, die hier die Form von kräftigen Blattfedern haben. Wie an sich bekannt, wird beim Pressenhub das Blech vom Stempel in die Matrzenausnehmung, begrenzt von den Schneidenteilen 24 und den Amboßabschnitten 26 beidseits der Ausnehmung 20, durchgesetzt, und wenn der Durchsatz durch die Arbeitsfläche 22 des Amboß gestoppt wird, fließt das durchgesetzte Material seitlich, weil die Schneidenteile elastisch auslenkbar sind.The tool set shown broken away in FIGS. 1 and 2, consisting of punch 10 and die 12, is clamped in any pressing device (not shown) and moved in the direction of arrows 14 in order to join two or more sheets 16 placed between punch and die. The die consists of a central anvil 18 with a recess 20, at the bottom of which the work surface 22 is located, and two cutting parts 24, which here have the shape of strong leaf springs. As is known per se, during the press stroke the sheet is pushed through by the punch into the die recess, delimited by the cutting parts 24 and the anvil sections 26 on both sides of the recess 20, and when the throughput is stopped by the working surface 22 of the anvil, the material passed through flows laterally , because the cutting parts can be deflected elastically.

Die Stempelkontur ist oval, wie in Fig. 3 erkennbar, und ebenso ist auch die Matrizenausnehmung annähernd oval (vgl. Fig. 8). Die Stempelkontur ist gegenüber der Matrizenkontur zurückgesetzt derart, daß beim Fügen keines der beiden Bleche durchschnitten wird, und ungleich in den beiden durch die Schnittebenen der Fig. 1 bzw. 2 definierten Ebenen:The stamp contour is oval, as can be seen in FIG. 3, and the die recess is also approximately oval (cf. FIG. 8). The stamp contour is set back in relation to the die contour in such a way that neither of the two sheets is cut through when joining, and unequal in the two planes defined by the sectional planes of FIGS. 1 and 2:

Das Maß "A" ist deutlich größer als das Maß "B", und dies wirkt sich auch auf die Querschnittsform der fertigen Fügeverbindung aus, wie in Fig. 5 und 6 dargestellt. In der Ebene 5-5 bleiben deutlich kräftigere Materialdicken der Durchsetzung stehen als im fließverpreßten Bereich der Ebene 6-6, wobei die Maße A und B sowie der Arbeitswinkel "C" des Stempels derart aufeinander abgestimmt sind, daß die Zugfestigkeit der Fügeverbindung in Richtung parallel zu den Blechen mindestens annähernd gleich ist. Wie Fig. 3 und 4 erkennen lassen, ist der Fügepunkt von beiden Blechseiten gesehen ästhetisch befriedigend.The dimension "A" is significantly larger than the dimension "B", and this also affects the cross-sectional shape of the finished joint connection, as shown in FIGS. 5 and 6. In the level 5-5, significantly thicker material thicknesses of the penetration remain than in the extruded area of the level 6-6, the dimensions A and B and the working angle "C" of the stamp being matched to one another in such a way that the tensile strength of the joint connection is parallel in the direction to the sheets is at least approximately the same. As can be seen in FIGS. 3 and 4, the joining point is aesthetically satisfactory when viewed from both sheet metal sides.

Die Darstellung nach Fig. 1 und 2 ist weitgehend schematisch, um das für die Erfindung Wesentliche zu erläutern. Eine so ausgeführte Matrize hätte zwei wesentliche Nachteile: Einmal muß für die Schneidenteile ein Kompromiß bezüglich der Festigkeit und der Elastizität gefunden werden, zum andern ist nicht auszuschließen,daß beim Fügen abgeschate Späne der Werkstücke in den Spalt zwischen Amboß und Schneidenteile gelangen und die letzteren dauernd abspreizen, was natürlich die Fügearbeit beeinträchtigt.The representation according to FIGS. 1 and 2 is largely schematic in order to explain the essentials for the invention. A die designed in this way would have two major disadvantages: on the one hand, a compromise in terms of strength and elasticity must be found for the cutting parts; on the other hand, it cannot be ruled out that shaved parts of the workpieces get into the gap between the anvil and cutting parts and the latter continuously spread, which of course affects the joining work.

Aus diesen Gründen ist eine Konstruktion gemäß Fig. 7 und 8 für die Matrize bevorzugt. Die Schneidenteile sind auf je einer Schneide 30 eines Sockels 32 auslenkbar abgestützt und werden von Blattfedern 34 in Anlage am Amboß 18 gehalten. Die Schneidenteile können daher aus sehr hartem Material gefertigt werden, während die Blattfedern ein nahezu unbehindertes Auffedern bei der Phase der Materialbreitung gewährleisten. Die Lager der Schneidenteile sind hier mit einer dem Stempel zugekehrten kreisbogenförmigen Auflage ausgeführt, so daß etwaige Verschmutzungen aus dem Lagerbereich nach unten fallen. Der Amboß ist unterhalb seines Arbeitsbereichs nach innen eingezogen, so daß sich Sammelräume 36 für Späne oder anderen Schmutz ergeben; diese Sammelräume liegen unterhalb der Lager 30. Amboß, Sockel und Blattfedern können durch einen Hohlniet oder dergleichen miteinander verbunden werden, wobei in Fig. 7 nur die Achse 38 eines solchen Verbindungselements angedeutet ist.For these reasons, a construction according to FIGS. 7 and 8 is preferred for the die. The cutting parts are each deflectably supported on a cutting edge 30 of a base 32 and are held in contact with the anvil 18 by leaf springs 34. The cutting parts can therefore be made of very hard material, while the leaf springs ensure almost unimpeded springing open during the material spreading phase. The bearings of the cutting parts are designed with an arc-shaped support facing the punch, so that any dirt falls down from the storage area. The anvil is drawn in below its working area, so that there are collecting spaces 36 for chips or other dirt; these collecting spaces are located below the bearing 30. Anvil, base and leaf springs can be connected to one another by means of a hollow rivet or the like, only the axis 38 of such a connecting element being indicated in FIG. 7.

Damit die Schneidenteile auf ihren Lagern 30 gehalten werden, weisen die Schneidenteile seitliche Ausschnitte 40 auf, in die abgewinkelte Lappen 42 der zugehörigen Blattfeder 34 greifen; die freien Enden dieser Lappen sind mit Abwinkelungen 44 versehen, die das zugehörige Schneidenteil formschlüssig umklammern. Der Platz dafür wird durch das Einziehen des Amboß′ geschaffen.So that the cutting parts are held on their bearings 30, the Cutting parts on lateral cutouts 40, in which angled tabs 42 of the associated leaf spring 34 engage; the free ends of these tabs are provided with bends 44 which form-fit the associated cutting part. The space for this is created by pulling the anvil '.

Die Spanbildung kann erheblich vermindert oder sogar ganz unterbunden werden, wenn die Kanten 46 des Amboß′ und die Kanten 48 der Schneidenteile nicht scharfkantig sind, sondern abgerundet werden.The chip formation can be significantly reduced or even completely prevented if the edges 46 of the anvil 'and the edges 48 of the cutting parts are not sharp-edged, but are rounded off.

Die Fig. 9 stellt eine Form des Stempels dar, bei der die Eindringtiefe des Stempels durch einen Bund 50 begrenzt wird, der sich auf die Oberseite des stempelseitigen Blechs setzt. Diese Bauart empfiehlt sich bei dünnen, weichen Blechen, um ein Hochsteigen des verdrängten Materials zu unterbinden. Außerdem braucht die verwendete Presse dann keine Hubbegrenzung, sondern nur eine Kraftbegrenzung aufzuweisen, was bei z.B hydraulischem Antrieb einfacher ist.FIG. 9 shows a form of the stamp in which the depth of penetration of the stamp is limited by a collar 50 which sits on the top of the stamp-side sheet. This design is recommended for thin, soft sheets to prevent the displaced material from rising. In addition, the press used then does not need to have a stroke limitation, but only a force limitation, which is easier with e.g. hydraulic drives.

Claims (10)

Vorrichtung zum Durchsetzfügen von Blechwerkstücken mit einem Stempel und einer Matrize, die einen stationären Amboß und zwei in vorgegebener Richtung elastisch auslenkbare Schneidenteile umfaßt, wobei die dem Stempel zugekehrte Seite der Matrize eine geschlossene Matrizenkontur des Durchsetzbereichs begrenzt, während die Stempelkontur gegenüber der Matrizenkontur soweit verkleinert ist, daß beim Fügen keines der Werkstücke durchtrennt wird, dadurch gekennzeichnet, daß der Amboß und die beiden Schneidenteile einander zugekehrte ebene Flächen aufweisen und die Matrizenkontur von den beiden Schneiden der Schneidenteile sowie einer in den Amboß eingebrachten Ausnehmung begrenzt ist.Device for pushing through sheet metal workpieces with a punch and a die, which comprises a stationary anvil and two cutting parts that can be deflected elastically in the given direction, the die side facing the punch delimiting a closed die contour of the push-through area, while the punch contour is reduced so far compared to the die contour that none of the workpieces is cut when joining, characterized in that the anvil and the two cutting parts have flat surfaces facing one another and the die contour is limited by the two cutting edges of the cutting parts and a recess made in the anvil. Vorrichtung nach Anspruch 1, gekennzeichnet durch eine ovale Stempelkontur und Matrizenkontur, die derart auf die Blechdicken abgestimmt sind, daß der matrizenseitige Fügepunkt im wesentlichen kreisrund ist.Apparatus according to claim 1, characterized by an oval stamp contour and die contour, which are matched to the sheet thicknesses in such a way that the joining point on the die side is essentially circular. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Schneidenteile gelenkig an einem Sockel abgestützt sind und von Blattfedern gegen den Amboß vorgespannt sind.Device according to one of claims 1 or 2, characterized in that the cutting parts are articulated on a base and are biased against the anvil by leaf springs. Vorrichtung nach Anspruch 3, gekennzeichnet durch eine formschlüssige Verbindung zwischen den Blattfedern und den Schneidenteilen.Apparatus according to claim 3, characterized by a positive connection between the leaf springs and the cutting parts. Vorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Schneidenteile auf dem Sockel mittels offener Schneidenlager mit sokkelseitiger Schneide abgestützt sind.Apparatus according to claim 3 or 4, characterized in that the cutting parts are supported on the base by means of open cutting edge bearings with a cutting edge on the base. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß zwischen dem Amboß und dem Sockel ein Spanraum ausgenommen ist, der sich in den Spalt zwischen Amboß und Schneidenteilen fortsetzt.Apparatus according to claim 5, characterized in that a chip space is recessed between the anvil and the base, which continues in the gap between the anvil and cutting parts. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Schneiden der Schneidenteile abgerundet sind.Device according to one of the preceding claims, characterized in that the cutting edges of the cutting parts are rounded. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die dem Stempel zugekehrte Kante der Amboßausnehmung abgerundet ist.Apparatus according to claim 7, characterized in that the edge of the anvil recess facing the stamp is rounded. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Schneidenteile eine verschleißmindernde Beschichtung aufweisen.Device according to claim 1, characterized in that the cutting parts have a wear-reducing coating. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Stempel einen seine Eindringtiefe begrenzenden Bund aufweist.Device according to one of the preceding claims, characterized in that the stamp has a collar which limits its depth of penetration.
EP92101047A 1988-02-24 1989-02-15 Device for joining metal sheets together Expired - Lifetime EP0513473B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3805688 1988-02-24
DE3805688A DE3805688A1 (en) 1988-02-24 1988-02-24 DEVICE FOR IMPLEMENTING SHEET METAL PIECES
EP89102558A EP0330061B1 (en) 1988-02-24 1989-02-15 Device for joining metal sheets together

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP89102558.7 Division 1989-02-15

Publications (2)

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EP0513473A1 true EP0513473A1 (en) 1992-11-19
EP0513473B1 EP0513473B1 (en) 1994-08-24

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EP92101047A Expired - Lifetime EP0513473B1 (en) 1988-02-24 1989-02-15 Device for joining metal sheets together
EP89102558A Expired - Lifetime EP0330061B1 (en) 1988-02-24 1989-02-15 Device for joining metal sheets together

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EP89102558A Expired - Lifetime EP0330061B1 (en) 1988-02-24 1989-02-15 Device for joining metal sheets together

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US (1) US5046228A (en)
EP (2) EP0513473B1 (en)
JP (1) JP2517757B2 (en)
AT (2) ATE110310T1 (en)
DE (3) DE3805688A1 (en)
ES (2) ES2035385T3 (en)
RU (1) RU1829979C (en)

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Also Published As

Publication number Publication date
DE3805688A1 (en) 1989-09-07
EP0330061A2 (en) 1989-08-30
EP0330061B1 (en) 1992-08-19
RU1829979C (en) 1993-07-23
ES2035385T3 (en) 1993-04-16
JPH0259129A (en) 1990-02-28
EP0513473B1 (en) 1994-08-24
JP2517757B2 (en) 1996-07-24
US5046228A (en) 1991-09-10
EP0330061A3 (en) 1990-09-05
ATE79574T1 (en) 1992-09-15
DE58908245D1 (en) 1994-09-29
DE58902059D1 (en) 1992-09-24
ATE110310T1 (en) 1994-09-15
ES2062831T3 (en) 1994-12-16

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