EP0366987A1 - Device for clinch joints - Google Patents

Device for clinch joints Download PDF

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Publication number
EP0366987A1
EP0366987A1 EP89118946A EP89118946A EP0366987A1 EP 0366987 A1 EP0366987 A1 EP 0366987A1 EP 89118946 A EP89118946 A EP 89118946A EP 89118946 A EP89118946 A EP 89118946A EP 0366987 A1 EP0366987 A1 EP 0366987A1
Authority
EP
European Patent Office
Prior art keywords
stamp
cutting parts
anvil
die
punch
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
EP89118946A
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German (de)
French (fr)
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EP0366987B1 (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.)
Walter Eckold GmbH and Co KG Vorrichtungs und Geraetebau
Original Assignee
Walter Eckold GmbH and Co KG Vorrichtungs und Geraetebau
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Priority to AT89118946T priority Critical patent/ATE72152T1/en
Publication of EP0366987A1 publication Critical patent/EP0366987A1/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
    • Y10T29/53—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
    • Y10T29/53765—Annular work with second workpiece inside annular work one workpiece moved to shape the other including near side fastener shaping tool

Definitions

  • the invention relates to a device for clinching with the features mentioned in the preamble of claim 1.
  • the term enforcement is described in DIN 8593, Part 5, Ord.No. 4.5.2.11 defined.
  • a more detailed description was published in "bands Plates Tubes” 4/1988, entitled “Technical aspects of the production pressure joining” by Liebig / Bober.
  • the one-step process the sheets are pushed through by the punch through the cutting parts of the die and then spread between the punch and the anvil, the cutting parts springing laterally.
  • the two-stage process the cutting parts remain and the anvil moves towards the punch under its own power, lifting the material that has passed through from the cutting parts.
  • the two-stage process can only be carried out with a double-acting press, so that the one-stage would be preferable.
  • the object of the invention is to provide a device of the same type, in which the mode of operation of the two-stage method is achieved with a single stroke of a single-acting press, that is to say “in one stage”.
  • the anvil is not moved onto the stamp relative to the stationary cutting parts, but the cutting parts deflect, not laterally, but in the direction of the stamp movement (which, of course, is not an additional lateral component excludes).
  • the depth of penetration of the stamp can be chosen to be so small that the spreading of the stamp-side sheet partly takes place at the level of the die-side sheet, which results in optically more beautiful joints with increased strength; wipers are only required in exceptional cases; Chips, oil or dirt cannot collect; a high fatigue strength of the die is guaranteed.
  • each cutting part has a semi-cylindrical recess 18, and the two recesses enclose the anvil 12 in the rest position.
  • a lamella 20 made of spring steel is fastened to the base at 22 and overlaps an associated cutting part with retaining tongues 24, which for this purpose on both sides of the semi-cylindrical recess has a gradation 26. In this way, the two cutting parts are captive, but are movably connected to the base and thus also to the anvil.
  • the stamp 30 has a conical shape which tapers in the direction of a likewise circular end face 32.
  • the working diameter of this end face of the stamp is significantly smaller than that of the anvil or the recesses in the cutting parts, such that the sheets 34 and 36 lying one above the other are not cut through when being pushed through (the invention can, however, also be used if the punch and die are cut through).
  • Fig. 2 shows the starting position. The sheets rest on the cutting parts, the punch is centered with respect to the anvil in the press (not shown).
  • Fig. 3 shows the situation after enforcement.
  • the stamp has deformed the material of both sheets into the cavity delimited by the semi-cylindrical recesses 18 and the end face of the anvil 12 until a collar 38 surrounding the punch sits on the sheet 34.
  • the dimensions are such that there is already a slight deformation of the material in the direction parallel to the sheets.
  • the angle at which the cover surfaces 14 run against the horizontal is chosen in this way; that the static friction between them and the Seated cutting parts in conjunction with the pretension of the spring lamellae is sufficient to prevent the cutting parts from escaping when being pushed through; it has been shown that the forces acting laterally are surprisingly low when enforced. However, as soon as the transverse forces that occur during spreading take effect, the cutting parts move laterally and, because of the downward slope, in the direction of the punch movement, since the lower sliding friction is then insufficient to hold the cutting parts.
  • Fig. 4 shows the end of the joining process.
  • the material of both sheets is reduced between the end faces of the anvil and the punch to about a third of the initial thickness, and the displaced material has flowed laterally over the edge of the anvil end face and thus forms a bead 40, the material of the punch-side sheet 34 flowing into the bead and clings there.
  • the joint produced with the tool set according to FIGS. 1 to 4 has good strength properties both in the direction parallel to the sheet metal planes and in the direction perpendicular to it. In contrast, the strength against twisting may be insufficient, so that it is advisable to place two joints next to each other;
  • Fig. 5 shows a die that enables simultaneous joining at two points in a press stroke (with a corresponding double punch, not shown).
  • the components corresponding to FIG. 1 are marked with the same reference symbols, so that a further explanation can be omitted.
  • the construction according to FIG. 1 or 5 may be too high; one can then modify the die as shown in FIG. 6: instead of downwards, the base 10 unloads laterally, where it has a fastening hole 42, and the spring lamellae 20 are riveted to this base projection at 44.
  • the exemplary embodiments described so far are based on the frictional engagement between the base and the cutting parts.
  • the coefficient of friction is, among other things, depending on the surface properties of the friction-mated parts and therefore not necessarily reproducible.
  • the cutting parts 16 are seated with projecting edges 46 on a corresponding radial shoulder 48 of the anvil. 1 to 6 is force-dependent, it is path-dependent in FIG. 7, because only when the expanding material "sheds" the cutting parts can they deflect downwards.
  • the design of the stamp and the return spring lamellae can take place as in the exemplary embodiments described first, so that these components have not been redrawn. It goes without saying that this principle of triggering can also be used in the other illustrated exemplary embodiments.
  • the cutting parts are simply prismatic, and the punch has a correspondingly elongated shape (here too, the return spring lamellae are not shown; reference is made to the other exemplary embodiments).
  • This tool set has the advantage over the other embodiments that the press does not necessarily have to act perpendicular to the anvil surface, but may have an offset of up to 30 ° on both sides in the plane parallel to the cutting edges 50 and nevertheless a useful joint is produced; This is particularly important when more complicated workpieces in a complete tool are to be provided with a large number of joints in a single press stroke.
  • Fig. 9 shows, enlarged compared to Fig. 8, a view in the direction of arrow "9" in a modified embodiment.
  • the slideway of the cutting parts and their sliding surfaces are provided with grooves parallel to the sliding direction, which, in addition to the static friction, also have a certain wedging effect and thus trigger make it more reproducible by force. This measure can also be used equally in the previously described exemplary embodiments.
  • the 10 and 11 has four cutting parts 16, each of which is assigned its own flat slideway 52.
  • the base and anvil are cylindrical.
  • the base has a screwed-in groove 54, into which a wire spring 56 is blown; a leg extends upward from it and forms an open ring which engages in corresponding grooves in the cutting parts. This ring acts as a return spring for the cutting parts.
  • Fig. 12 shows schematically and greatly enlarged compared to the previous figures, a construction in which the cutting part 16 not only rests on a radial support surface, as in Fig. 7, but wedges positively with the anvil at 60. It has been shown that the expanding material also triggers the cutting parts here, the tripping being very reproducible. It is understood that a plurality of such "claws" can be provided along the guideway 62. As in FIGS. 7 and 8, the return spring plate is also not shown here.
  • the punch 30 has a recessed groove 70, into which a bead 72 of a slotted ring 74 is injected.
  • the ring is so massive that when it is seated on the metal sheets to be joined, it spreads very little resiliently by its inner cone 76 sliding along the cone section 78 of the stamp. During the press return stroke, it then throws the workpiece off the punch. It goes without saying that one whose types of wipers can provide, such as those that are independent of the federal government 38.
  • the actual stamp has a radial flange 80 which is guided in a sleeve 82 provided with the collar 38.
  • the sleeve is screwed to a stamp carrier 84.
  • a package of disc springs 86 is clamped between this and the flange 80;
  • Disc springs are known to have a negative path-force characteristic curve, so that when a load specified by the dimensioning of the springs is reached, the stamp springs back suddenly.
  • the principle of the slotted spring washer shown in FIGS. 13 and 14 is also applicable to the die.
  • the cutting parts 16 can be combined into a single slotted ring, while the separate return spring 56 is omitted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Massaging Devices (AREA)
  • External Artificial Organs (AREA)
  • Sealing Devices (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Press Drives And Press Lines (AREA)
  • Air Bags (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

The tool set comprises a male die and a female die cooperating to connect metal sheet workpieces when driven by a press. The male die is trunconical. The female die includes an anvil and forming members which, in a first operation phase, are stationarily supported and, in a second phase, are subjected to a movement in the same direction as the male die, thereby simulating the effect of a double stroke press.

Description

Die Erfindung betrifft eine Vorrichtung zum Durchsetzfügen mit den im Oberbegriff des Patentanspruchs 1 genannten Merkmalen. Der Begriff des Durchsetzfügens ist in DIN 8593, Teil 5, Ordn.-Nr. 4.5.2.11 de­finiert. Eine eingehendere Beschreibung ist in "Bänder Bleche Rohre" 4/1988 unter dem Titel "Fertigungstechnische Aspekte des Druckfügens" von Liebig/Bober veröffentlicht worden. In dieser Veröffentlichung wird zwischen sogenannten einstufigen und zweistufigen Verfahren un­terschieden. Beim einstufigen Verfahren werden die Bleche vom Stempel durch die Schneidenteile der Matrize durchgesetzt und dann zwischen dem Stempel und dem Amboß gebreitet, wobei die Schneidenteile seit­lich federnd ausweichen. Beim zweistufigen Verfahren bleiben die Schneidenteile stehen, und der Amboß bewegt sich unter eigenem An­trieb auf den Stempel zu, wobei er das durchgesetzte Material aus den Schneidenteilen heraushebt. In der genannten Veröffentlichung wird angemerkt, daß das zweistufige Verfahren nur mit einer doppeltwir­kenden Presse ausführbar sei, so daß das einstufige zu bevorzugen wäre.The invention relates to a device for clinching with the features mentioned in the preamble of claim 1. The term enforcement is described in DIN 8593, Part 5, Ord.No. 4.5.2.11 defined. A more detailed description was published in "bands Plates Tubes" 4/1988, entitled "Technical aspects of the production pressure joining" by Liebig / Bober. In this publication, a distinction is made between so-called one-step and two-step processes. In the one-step process, the sheets are pushed through by the punch through the cutting parts of the die and then spread between the punch and the anvil, the cutting parts springing laterally. In the two-stage process, the cutting parts remain and the anvil moves towards the punch under its own power, lifting the material that has passed through from the cutting parts. In the cited publication it is noted that the two-stage process can only be carried out with a double-acting press, so that the one-stage would be preferable.

Aufgabe der Erfindung ist es, eine gattungsgleiche Vorrichtung zu schaffen, bei der die Wirkungsweise des zweistufigen Verfahrens mit einem einzigen Hub einer einfachwirkenden Presse, also "einstufig", erzielt wird.The object of the invention is to provide a device of the same type, in which the mode of operation of the two-stage method is achieved with a single stroke of a single-acting press, that is to say “in one stage”.

Diese Aufgabe wird durch die im kennzeichnenden Teil des Patentan­spruchs 1 genannten Merkmale gelöst.This object is achieved by the features mentioned in the characterizing part of patent claim 1.

Im Gegensatz zu dem in der genannten Veröffentlichung beschriebenen zweistufigen Verfahren wird nicht der Amboß relativ zu den stationä­ren Schneidenteilen auf den Stempel zu verlagert, sondern die Schneidenteile weichen aus, und zwar nicht seitlich, sondern in Richtung der Stempelbewegung (was eine zusätzliche seitliche Kompo­nente freilich nicht ausschließt).In contrast to the two-stage process described in the cited publication, the anvil is not moved onto the stamp relative to the stationary cutting parts, but the cutting parts deflect, not laterally, but in the direction of the stamp movement (which, of course, is not an additional lateral component excludes).

Die erfindungsgemäße Vorrichtung hat zahlreiche Vorteile gegenüber der bisher bekannten einstufig arbeitenden Vorrichtung:The device according to the invention has numerous advantages over the previously known single-stage device:

Die Eindringtiefe des Stempels kann so klein gewählt werden, daß die Breitung des stempelseitigen Blechs teilweise auf dem Niveau des ma­trizenseitigen Blechs erfolgt, was optisch schönere Fügestellen mit erhöhter Festigkeit ergibt; es sind nur in Ausnahmefällen Abstreifer erforderlich; Späne, Öl oder Schmutz können sich nicht ansammeln; eine hohe Dauerstandfestigkeit der Matrize.ist gewährleistet.The depth of penetration of the stamp can be chosen to be so small that the spreading of the stamp-side sheet partly takes place at the level of the die-side sheet, which results in optically more beautiful joints with increased strength; wipers are only required in exceptional cases; Chips, oil or dirt cannot collect; a high fatigue strength of the die is guaranteed.

Bevorzugte Ausführungsbeispiele des Gegenstandes der Erfindung sind in den beigefügten Zeichnungen dargestellt und werden nachstehend im einzelnen erläutert.

  • Fig. 1 zeigt in perspektivischer Teilansicht eine Matrize,
  • Fig. 2 bis 4 zeigen im Halblängsschnitt drei Phasen des Fügevor­gangs,
  • Fig. 5 und 6 zeigen Varianten der Matrize gemäß Fig. 1 in per­spektivischer Darstellung,
  • Fig. 7 ist ein Längsschnitt einer weiteren Ausführungsform einer Matrize,
  • Fig. 8 stellt perspektivisch, zum Teil weggebrochen, Matrize und Stempel einer weiteren Ausführungsform dar,
  • Fig. 9 ist eine Detailansicht in Richtung "9" der Fig. 8,
  • Fig. 10 zeigt im Längsschnitt eine weitere Matrize,
  • Fig. 11 ist eine Draufsicht auf die Matrize nach Fig. 10,
  • Fig. 12 zeigt stark vergrößert eine Variante des Matrizenauf­baus,
  • Fig. 13 und 14 zeigen im Schnitt bzw. in Ansicht von unten eine abgewandtelte Stempelform, und
  • Fig. 15 zeigt im Schnitt eine weitere Stempelvariante.
Preferred embodiments of the object of the invention are illustrated in the accompanying drawings and are explained in detail below.
  • 1 shows a partial perspective view of a die,
  • 2 to 4 show three phases of the joining process in the longitudinal section,
  • 5 and 6 show variants of the die according to FIG. 1 in a perspective view,
  • 7 is a longitudinal section of another embodiment of a die,
  • 8 shows in perspective, partly broken away, die and stamp of a further embodiment,
  • FIG. 9 is a detailed view in the direction "9" of FIG. 8,
  • 10 shows a further die in longitudinal section,
  • 11 is a top view of the die of FIG. 10;
  • 12 shows a greatly enlarged variant of the matrix structure,
  • 13 and 14 show in section or in view from below a modified stamp shape, and
  • 15 shows a further stamp variant in section.

Die Matrize nach Fig. 1 umfaßt einen Sockel 10, an den ein Amboß 12 angeformt oder in den der Amboß eingesetzt ist. Die freie Stirnseite des Amboß' ist kreisrund. Im übrigen ist die Oberseite des Sockels mit dachartig schräg nach außen abfallenden Deckflächen 14 versehen. Auf diesen Deckflächen sitzen Schneidenteile 16, die spiegelsymme­trisch identisch sind, so daß nur eines vollständig dargestellt wur­de. Jedes Schneidenteil weist eine halbzylindrische Ausnehmung 18 auf, und die beiden Ausnehmungen umschließen in der Ruheposition den Amboß 12. Eine Lamelle 20 aus Federstahl ist bei 22 am Sockel befe­stigt und übergreift mit Haltezungen 24 ein zugehöriges Schneiden­teil, das für diesen Zweck beidseits der halbzylindrischen Ausnehmung je eine Abstufung 26 aufweist. Auf diese Weise sind die beiden Schneidenteile unverlierbar, jedoch beweglich mit dem Sockel und so auch mit dem Amboß verbunden.1 comprises a base 10, on which an anvil 12 is molded or in which the anvil is inserted. The free face of the anvil is circular. Otherwise, the top of the base provided with roof surfaces 14 sloping obliquely outwards. Cutting parts 16 are seated on these cover surfaces, which are identical in mirror symmetry, so that only one has been shown completely. Each cutting part has a semi-cylindrical recess 18, and the two recesses enclose the anvil 12 in the rest position. A lamella 20 made of spring steel is fastened to the base at 22 and overlaps an associated cutting part with retaining tongues 24, which for this purpose on both sides of the semi-cylindrical recess has a gradation 26. In this way, the two cutting parts are captive, but are movably connected to the base and thus also to the anvil.

Der Stempel 30 hat eine konische Form, die sich in Richtung auf eine ebenfalls kreisrunde Stirnseite 32 verjüngt. Der Arbeitsdurchmesser dieser Stempelstirnseite ist jedoch deutlich kleiner als der des Am­boß' bzw. der Ausnehmungen der Schneidenteile, derart, daß beim Durchsetzen die übereinanderliegenden Bleche 34 und 36 nicht durch­schnitten werden (die Erfindung ist jedoch auch bei durchschneidender Gestaltung von Stempel und Matrize anwendbar).The stamp 30 has a conical shape which tapers in the direction of a likewise circular end face 32. However, the working diameter of this end face of the stamp is significantly smaller than that of the anvil or the recesses in the cutting parts, such that the sheets 34 and 36 lying one above the other are not cut through when being pushed through (the invention can, however, also be used if the punch and die are cut through).

Fig. 2 zeigt die Ausgangsposition. Die Bleche ruhen auf den Schnei­denteilen, der Stempel ist bezüglich des Amboß' zentriert in der Presse (nicht gezeigt) aufgenommen.Fig. 2 shows the starting position. The sheets rest on the cutting parts, the punch is centered with respect to the anvil in the press (not shown).

Fig. 3 zeigt die Situation nach dem Durchsetzen. Der Stempel hat Ma­terial beider Bleche in die von den halbzylindrischen Ausnehmungen 18 und der Stirnseite des Amboß' 12 begrenzten Hohlraum hinein defor­miert, bis ein den Stempel umgebender Bund 38 auf dem Blech 34 auf­sitzt. Die Abmessungen sind so getroffen, daß bereits eine geringfü gige Deformation des durchgesetzten Materials in Richtung parallel zu den Blechen erfolgt.Fig. 3 shows the situation after enforcement. The stamp has deformed the material of both sheets into the cavity delimited by the semi-cylindrical recesses 18 and the end face of the anvil 12 until a collar 38 surrounding the punch sits on the sheet 34. The dimensions are such that there is already a slight deformation of the material in the direction parallel to the sheets.

Der Winkel, unter dem die Deckflächen 14 gegen die Horizontale ver­laufen, ist so gewählt; daß die Haftreibung zwischen ihnen und den aufsitzenden Schneidenteilen in Verbindung mit der Vorspannung der Federlamellen ausreicht, ein Ausweichen der Schneidenteile beim Durchsetzen zu verhindern; es hat sich nämlich gezeigt, daß beim Durchsetzen die seitlich wirkenden Kräfte überraschend gering sind. Sobald jedoch die bei der Breitung auftretenden Querkräfte wirksam werden, weichen die Schneidenteile seitlich und, wegen der abwärts weisenden Schräge, in Richtung der Stempelbewegung aus, da die dann geringere Gleitreibung unzureichend ist, die Schneidenteile zu hal­ten.The angle at which the cover surfaces 14 run against the horizontal is chosen in this way; that the static friction between them and the Seated cutting parts in conjunction with the pretension of the spring lamellae is sufficient to prevent the cutting parts from escaping when being pushed through; it has been shown that the forces acting laterally are surprisingly low when enforced. However, as soon as the transverse forces that occur during spreading take effect, the cutting parts move laterally and, because of the downward slope, in the direction of the punch movement, since the lower sliding friction is then insufficient to hold the cutting parts.

Fig. 4 zeigt das Ende des Fügevorgangs. Das Material beider Bleche ist zwischen den Stirnseiten von Amboß und Stempel auf etwa ein Drittel der Ausgangsdicke reduziert, und das verdrängte Material ist seitlich über die Kante der Amboßstirnseite geflossen und bildet so einen Wulst 40, wobei das Material des stempelseitigen Bleches 34 in den Wulst hineingeflossen ist und sich dort verklammert.Fig. 4 shows the end of the joining process. The material of both sheets is reduced between the end faces of the anvil and the punch to about a third of the initial thickness, and the displaced material has flowed laterally over the edge of the anvil end face and thus forms a bead 40, the material of the punch-side sheet 34 flowing into the bead and clings there.

Die mit dem Werkzeugsatz nach Fig. 1 bis 4 hergestellte Fügung hat gute Festigkeitseigenschaften sowohl in Richtung parallel zu den Blechebenen als auch in Richtung senkrecht dazu. Dagegen ist die Festgkeit gegen Verdrehen gegebenenfalls unzureichen, so daß es sich empfiehlt, zwei Fügungen nebeneinander anzubringen; Fig. 5 zeigt eine Matrize, die in einem Pressenhub (mit einem entsprechenden, nicht dargestellten Doppelstempel) das gleichzeitige Fügen an zwei Stellen ermöglicht. Die der Fig. 1 entsprechenden Bauteile sind mit denselben Bezugszeichen markiert, so daß eine weitere Erläuterung entfallen kann.The joint produced with the tool set according to FIGS. 1 to 4 has good strength properties both in the direction parallel to the sheet metal planes and in the direction perpendicular to it. In contrast, the strength against twisting may be insufficient, so that it is advisable to place two joints next to each other; Fig. 5 shows a die that enables simultaneous joining at two points in a press stroke (with a corresponding double punch, not shown). The components corresponding to FIG. 1 are marked with the same reference symbols, so that a further explanation can be omitted.

Bei ungünstigen Platzverhältnissen baut die Konstruktion nach Fig. 1 oder 5 gegebenenfalls zu hoch; man kann dann die Matrize so abwan­deln, wie in Fig. 6 dargestellt: Anstatt nach unten, lädt der Sockel 10 seitlich aus, wo er ein Befestigungsloch 42 aufweist, und die Fe­derlamellen 20 sind bei 44 an dieser Sockelausladung angenietet.If the available space is unfavorable, the construction according to FIG. 1 or 5 may be too high; one can then modify the die as shown in FIG. 6: instead of downwards, the base 10 unloads laterally, where it has a fastening hole 42, and the spring lamellae 20 are riveted to this base projection at 44.

Die insoweit beschriebenen Ausführungsbeispiele beruhen auf dem Rei­bungsschluß zwischen Sockel und Schneidenteilen. Der Reibungskoeffi­zient ist aber u.a. von der Oberflächenbeschaffenheit der reibungs­gepaarten Teile abhängig und somit nicht unbedingt reproduzierbar. Bei dem Ausführungsbeipiel nach Fig. 7 sitzen die Schneidenteile 16 mit einspringenden Kanten 46 auf einer entsprechenden radialen Schulter 48 des Amboß' auf. Während die Auslösung der Schneidenteile bei Fig. 1 bis 6 kraftabhängig erfolgt, ist sie bei Fig. 7 wegabhän­gig, denn erst wenn das sich breitende Material die Schneidenteile "abwirft", können diese nach unten ausweichen. Es ist anzumerken, daß die Gestaltung des Stempels und der Rückstell-Federlamellen wie in den zuerst beschriebenen Ausführungsbeispielen erfolgen kann, so daß diese Bauteile nicht nochmals gezeichnet wurden. Es versteht sich, daß dieses Prinzip der Auslösung auch bei den anderen dargestellten Ausführungsbeispielen anwendbar ist.The exemplary embodiments described so far are based on the frictional engagement between the base and the cutting parts. The coefficient of friction is, among other things, depending on the surface properties of the friction-mated parts and therefore not necessarily reproducible. 7, the cutting parts 16 are seated with projecting edges 46 on a corresponding radial shoulder 48 of the anvil. 1 to 6 is force-dependent, it is path-dependent in FIG. 7, because only when the expanding material "sheds" the cutting parts can they deflect downwards. It should be noted that the design of the stamp and the return spring lamellae can take place as in the exemplary embodiments described first, so that these components have not been redrawn. It goes without saying that this principle of triggering can also be used in the other illustrated exemplary embodiments.

Das gilt auch für die Matrize nach Fig. 8. Die Schneidenteile sind einfach prismatisch, und der Stempel hat eine entsprechend langge­streckte Form (auch hier sind die Rückstell-Federlamellen nicht dar­gestellt; auf die anderen Ausführungsbeispiele wird verwiesen). Die­ser Werkzeugsatz hat gegenüber den anderen Ausführungsformen den Vorteil, daß die Presse nicht unbedingt senkrecht zur Amboßfläche wirken muß, sondern in der zu den Schneiden 50 parallelen Ebene nach beiden Seiten um bis zu 30° Versatz aufweisen darf und trotzdem eine brauchbare Fügung entsteht; dies ist vor allem dann von Bedeutung, wenn kompliziertere Werkstücke in einem Komplettwerkzeug mit einer großen Zahl von Fügungen in einem einzigen Pressenhub versehen werden sollen.This also applies to the die according to FIG. 8. The cutting parts are simply prismatic, and the punch has a correspondingly elongated shape (here too, the return spring lamellae are not shown; reference is made to the other exemplary embodiments). This tool set has the advantage over the other embodiments that the press does not necessarily have to act perpendicular to the anvil surface, but may have an offset of up to 30 ° on both sides in the plane parallel to the cutting edges 50 and nevertheless a useful joint is produced; This is particularly important when more complicated workpieces in a complete tool are to be provided with a large number of joints in a single press stroke.

Fig. 9 zeigt, gegenüber Fig. 8 vergrößert, eine Ansicht in Richtung des Pfeiles "9" bei einer abgewandelten Ausführungsform. Die Gleit­bahn der Schneidenteile und deren Gleitflächen sind mit Nuten paral­lel zur Gleitrichtung versehen, die zusätzlich zur Haftreibeung noch eine gewisse Verkeilungswirkung mit sich bringen und so die Auslöse­ kraft besser reproduzierbar machen. Auch diese Maßnahme läßt sich bei den vorher beschriebenen Ausführungsbeispielen gleichermaßen anwen­den.Fig. 9 shows, enlarged compared to Fig. 8, a view in the direction of arrow "9" in a modified embodiment. The slideway of the cutting parts and their sliding surfaces are provided with grooves parallel to the sliding direction, which, in addition to the static friction, also have a certain wedging effect and thus trigger make it more reproducible by force. This measure can also be used equally in the previously described exemplary embodiments.

Die Matrize nach Fig. 10 und 11 weist vier Schneidenteile 16 auf, denen je eine eigene ebene Gleitbahn 52 zugeordnet ist. Sockel und Amboß sind zylindrisch. Der Sockel weist eine eingedrehte Nut 54 auf, in die eine Drahtfeder 56 eingesprengt ist; von ihr erstreckt sich ein Schenkel nach oben und bildet einen offenen Ring, der in ent­sprechende Nuten der Schneidenteile greift. Dieser Ring wirkt als Rückstellfeder für die Schneidenteile.10 and 11 has four cutting parts 16, each of which is assigned its own flat slideway 52. The base and anvil are cylindrical. The base has a screwed-in groove 54, into which a wire spring 56 is blown; a leg extends upward from it and forms an open ring which engages in corresponding grooves in the cutting parts. This ring acts as a return spring for the cutting parts.

Fig. 12 zeigt schematisch und gegenüber den vorhergehenden Figuren stark vergrößert eine Konstruktion, bei der das Schneidenteil 16 nicht nur auf einer radialen Abstützfläche, wie in Fig. 7, aufliegt, sondern sich bei 60 mit dem Amboß formschlüssig verkeilt. Es hat sich gezeigt, daß auch hier das sich breitende Material die Schneidenteile zur Auslösung bringt, wobei die Auslösung sehr gut reproduzierbar ist. Es versteht sich, daß längs der Führungsbahn 62 eine Mehrzahl solcher "Krallen" vorgsehene werden kann. Wie in Fig. 7 und 8 ist auch hier die Rückstell-Federlamelle nicht mit gezeichnet.Fig. 12 shows schematically and greatly enlarged compared to the previous figures, a construction in which the cutting part 16 not only rests on a radial support surface, as in Fig. 7, but wedges positively with the anvil at 60. It has been shown that the expanding material also triggers the cutting parts here, the tripping being very reproducible. It is understood that a plurality of such "claws" can be provided along the guideway 62. As in FIGS. 7 and 8, the return spring plate is also not shown here.

Auf der Matrizenseite werden keine Auswerfer für die gefügten Werk­stücke benötigt. Stempelseitig kann aber ein Werkstück doch einmal hängenbleiben. Deshalb ist bei dem Stempel nach Fig. 13 und 14 ein Auswerfer vorgesehen, der allerdings nur einen minimalen Weg ausführt (mehr wird auch wegen der Konusform des Stempels nicht benötigt):No ejectors are required for the joined workpieces on the die side. On the stamp side, however, a workpiece can get stuck. For this reason, an ejector is provided for the stamp according to FIGS. 13 and 14, which, however, only executes a minimal path (more is not required because of the cone shape of the stamp):

Der Stempel 30 weist eine einspringende Nut 70 auf, in die ein Wulst 72 eines geschlitzten Rings 74 eingesprengt ist. Der Ring ist so massiv, daß er sich beim Aufsitzen auf den zu fügenden Blechen nur sehr wenig federnd aufspreizt, indem sein Innenkonus 76 längs des Konusabschnitts 78 des Stempels gleitet. Beim Pressenrückhub wirft er dann das Werkstück von dem Stempel ab. Es versteht sich, daß man an­ dere Arten von Abstreifern vorsehen kann, etwa solche, die unabhängig sind von dem Bund 38.The punch 30 has a recessed groove 70, into which a bead 72 of a slotted ring 74 is injected. The ring is so massive that when it is seated on the metal sheets to be joined, it spreads very little resiliently by its inner cone 76 sliding along the cone section 78 of the stamp. During the press return stroke, it then throws the workpiece off the punch. It goes without saying that one whose types of wipers can provide, such as those that are independent of the federal government 38.

Es ist bekannt, daß die beim Fügen von der Presse aufzubringenden Kräfte einen scharfen Anstieg beim Übergang vom Durchsetzen zum Breiten aufweisen. Diese Tatsache wird bei dem Stempel gemäß Fig. 15 dazu benutzt, den Stempel beim Breiten zurückzunehmen, so daß die Fügestelle besonders flach wird:It is known that the forces to be exerted by the press during joining have a sharp increase in the transition from passing through to spreading. This fact is used in the stamp according to FIG. 15 to take the stamp back when it is being made wide, so that the joint becomes particularly flat:

Der eigentliche Stempel weist einen Radialflansch 80 auf, der in ei­ner mit dem Bund 38 versehenen Hülse 82 geführt ist. Die Hülse ist mit einem Stempelträger 84 verschraubt. Zwischen diesem und dem Flansch 80 ist ein Paket Tellerfedern 86 eingespannt; Tellerfedern haben bekanntlich eine negativ verlaufende Weg-Kraft-Kennlinie, so daß bei Erreichen einer durch die Dimensionierung der Federn vorgegebenen Belastung der Stempel ruckartig zurückspringt. Es versteht sich, daß man die "Auslösung" bei den Schneidenteilen einerseits, dem Stempel andererseits aufeinander abstimmen wird, derart, daß der Stempel frühestens zusammen mit den Schneidenteilen "auslöst".The actual stamp has a radial flange 80 which is guided in a sleeve 82 provided with the collar 38. The sleeve is screwed to a stamp carrier 84. A package of disc springs 86 is clamped between this and the flange 80; Disc springs are known to have a negative path-force characteristic curve, so that when a load specified by the dimensioning of the springs is reached, the stamp springs back suddenly. It goes without saying that the "triggering" of the cutting parts on the one hand and the punch on the other hand will be coordinated with one another in such a way that the punch "triggers" at the earliest with the cutting parts.

Es ist anzumerken, daß das in Fig. 13 und 14 dargestellte Prinzip des geschlitzten Spreizfederrings auch bei der Matrize anwendbar ist. So kann man in der Ausführungsform nach Fig. 10 und 11 die Schneiden­teile 16 zu einem einzigen geschlitzten Ring zusammenfassen, während die gesonderte Rückstellfeder 56 entfällt.It should be noted that the principle of the slotted spring washer shown in FIGS. 13 and 14 is also applicable to the die. Thus, in the embodiment according to FIGS. 10 and 11, the cutting parts 16 can be combined into a single slotted ring, while the separate return spring 56 is omitted.

Claims (7)

1. Vorrichtung zum Durchsetzfügen flächig aufeinanderliegender Bleche mit einem Stempel und einer Matrize, die einen Amboß und an diesem angeordnete, den Durchsetzbereich begrenzende Schneidenteile umfaßt, wobei Stempel und Matrize in eine Presse derart einsetzbar sind, daß die Stirnfläche des Stempels der Stirnfläche des Amboß' gegenüberliegt, dadurch gekennzeichnet, daß der Stempel einen seine Eindringtiefe begrenzenden Anschlag aufweist und daß die Schneiden­teile in Richtung der Stempelbewegung ausweichend an dem Amboß ange­ordnet sind.1. Apparatus for pushing through flat sheets lying one on top of the other with a punch and a die, which comprises an anvil and cutting parts arranged thereon and delimiting the push-through area, the punch and die being insertable into a press in such a way that the face of the punch faces the face of the anvil. opposite, characterized in that the stamp has a stop limiting its depth of penetration and that the cutting parts are arranged in the direction of the stamp evasive on the anvil. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der An­schlag von einem den Stempelfuß umgebenden Bund gebildet ist.2. Device according to claim 1, characterized in that the stop is formed by a collar surrounding the stamp foot. 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Eindringtiefe des Stempels größer ist als die Dicke des stempel­seitigen Blechs und kleiner ist als die Dicke aller zu fügenden Ble­che.3. Device according to claim 1 or 2, characterized in that the depth of penetration of the stamp is greater than the thickness of the stamp-side sheet and is smaller than the thickness of all sheets to be joined. 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekenn­zeichnet, daß der Arbeitsquerschnitt des Stempels kleiner ist als der von den Schneidenteilen begrenzte Durchsetzbereich.4. Device according to one of claims 1 to 3, characterized in that the working cross-section of the stamp is smaller than the penetration area limited by the cutting parts. 5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekenn­zeichnet, daß die Schneidenteile während des Durchsetzens am Amboß abgestützt sind und erst bei einer vorgegebenen Phase des Fügevor­gangs die Abstützung deaktiviert ist.5. Device according to one of claims 1 to 4, characterized in that the cutting parts are supported on the anvil during enforcement and the support is deactivated only at a predetermined phase of the joining process. 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Schneidenteile auf schiefen Ebenen des Amboß' abgestützt sind, von denen sie bei der vorgegebenen Phase seitlich abgleiten.6. The device according to claim 5, characterized in that the cutting parts are supported on inclined planes of the anvil ', from which they slide laterally in the predetermined phase. 7. Vorrichtung nach einem der vorangehenden Ansprüche, gekenn­zeichnet durch Rückstellfedern, die nach Abnahme der Fügestelle von der Matrize die Schneidenteile in ihre Ausgangslage zurückbringen.7. Device according to one of the preceding claims, characterized by return springs which bring the cutting parts back into their starting position after removal of the joint from the die.
EP89118946A 1988-10-29 1989-10-12 Device for clinch joints Expired - Lifetime EP0366987B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89118946T ATE72152T1 (en) 1988-10-29 1989-10-12 ENFORCEMENT DEVICE.

Applications Claiming Priority (2)

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DE3836937A DE3836937A1 (en) 1988-10-29 1988-10-29 ENFORCEMENT DEVICE
DE3836937 1988-10-29

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EP0366987A1 true EP0366987A1 (en) 1990-05-09
EP0366987B1 EP0366987B1 (en) 1992-01-29

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US (1) US4972565A (en)
EP (1) EP0366987B1 (en)
JP (1) JP2515894B2 (en)
AT (1) ATE72152T1 (en)
CA (1) CA2001636C (en)
DE (2) DE3836937A1 (en)
ES (1) ES2030573T3 (en)
RU (1) RU1773238C (en)

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WO2002081112A2 (en) * 2001-04-04 2002-10-17 Tox Pressotechnik Gmbh & Co. Kg Tool for riveted connection

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US5230136A (en) * 1992-05-04 1993-07-27 Savair Inc. Punch and die set for sheet metal clinching
EP0835701B1 (en) * 1996-10-09 2003-11-19 ECKOLD GmbH & Co. KG Die for clinch joints
DE29700868U1 (en) * 1997-01-21 1997-05-15 Avdel Verbindungselemente GmbH, 30851 Langenhagen Push through device
GB2334474B (en) * 1999-05-19 2000-01-19 Colin Maxwell Wade Ductile material clinch joiner
US6430794B1 (en) 2000-05-17 2002-08-13 Mckee James E. Female crimping die and system for crimping metal sheets
ES2345304T3 (en) * 2007-02-13 2010-09-20 Inventio Ag PROCEDURE AND TOOL FOR CLINCHING THICK METAL LAYERS AND USING THE TOOL.
US8650730B2 (en) 2009-02-23 2014-02-18 Btm Corporation Clinching tool
DE102009003655B4 (en) * 2009-03-23 2012-01-19 Thyssenkrupp Steel Europe Ag A method for producing a sheet metal blank, as well as a sheet metal blank and the forming tool for producing a sheet with a thickness transition at a connecting edge
SE0900538A1 (en) * 2009-04-22 2010-05-25 Hans Bergkvist Apparatus for joining two or more overlapping material parts and method for manufacturing the apparatus
US10328481B2 (en) 2014-03-18 2019-06-25 Btm Company Llc Clinching punch and apparatus
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US11577865B2 (en) 2019-12-06 2023-02-14 Deere & Company Integrated wrapping system for large square baler
US11446726B2 (en) * 2020-05-14 2022-09-20 BTM Company, LLC Metal fastening die assembly

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Also Published As

Publication number Publication date
ES2030573T3 (en) 1992-11-01
US4972565A (en) 1990-11-27
CA2001636A1 (en) 1990-04-29
JPH02155524A (en) 1990-06-14
CA2001636C (en) 1995-06-06
ATE72152T1 (en) 1992-02-15
DE58900799D1 (en) 1992-03-12
JP2515894B2 (en) 1996-07-10
RU1773238C (en) 1992-10-30
EP0366987B1 (en) 1992-01-29
DE3836937A1 (en) 1990-05-03

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