EP3571028B1 - Stripper strip - Google Patents

Stripper strip Download PDF

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Publication number
EP3571028B1
EP3571028B1 EP18700580.6A EP18700580A EP3571028B1 EP 3571028 B1 EP3571028 B1 EP 3571028B1 EP 18700580 A EP18700580 A EP 18700580A EP 3571028 B1 EP3571028 B1 EP 3571028B1
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EP
European Patent Office
Prior art keywords
stripping
claw
break
ram
breakout
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EP18700580.6A
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German (de)
French (fr)
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EP3571028A1 (en
Inventor
Tobias Jakob
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Boxplan GmbH and Co KG
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Boxplan GmbH and Co KG
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Publication of EP3571028A1 publication Critical patent/EP3571028A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1818—Means for removing cut-out material or waste by pushing out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor

Definitions

  • the invention relates to a breakaway claw according to the preamble of claim 1.
  • the invention relates to the field of stripping technology, in which a panel, but in particular also a waste (stripping part), is broken out of a flat material web.
  • punching devices are used, such as those in DE 100 23 896 A1 or the DE 20 2008 012 789 A1 are described.
  • a large-area plate usually made of wood, is used as a stripping tool, in which stripping claws are inserted at certain positions in the area of the stripping part to be stripped.
  • the break-out claws are inserted manually by means of a hammer and an associated pin, which act on an attack surface of the break-out claw to be used in order to bring it into a defined position in a defined depth of the plate-shaped break-out tool.
  • Crown pins or break-out claws are mainly known and are used, for example, in the DE 10 2012 103 858 A1 described.
  • the crown pin is cylindrical, the tip being round and covered with a multitude of spikes. This point has a flat effect on the stripped part. This counteracts an uncontrolled tilting away of the stripped part while it is being removed from the punched sheet. This means that there is significantly more pressure on the stripped part. Negative influences such as thick break points, poor knife cut or slightly imprecise fit of the punched sheet are optimally compensated.
  • a break-out claw on the other hand, is strip-shaped and has a straight tip with prongs arranged on both sides. These can only penetrate the stripped part as far as they protrude beyond the straight tip. This means that when the tip of these break-out claws penetrate into the break-out part, there is no resilience, which has been found to be negative in many applications.
  • the object of the present invention is to overcome the disadvantages of the prior art.
  • a break-out claw should be provided that is significantly more flexible and self-centering.
  • the concave curvature leaves a Plunger receptacle to a variation of the penetration depth, depending on what counter pressure is built up.
  • a breakout claw according to the prior art does not have a concave curvature in the form of the ram receptacle 7, but rather a flat surface, since the breakout claw according to the prior art is specially held and driven into the breakout tool with a hammer.
  • a concave curvature would be unfavorable in this respect. If, for example, the stripping claw is set at an angle to the stripping part, ie the end of the stripping claw is not exactly parallel to the stripping part, a tip of the free end of the stripping claw first penetrates the stripping part.
  • the ram holder is particularly important for the automated and mechanical insertion of the stripping claw into the stripping tool.
  • the automatic insertion of the break-out claw according to the invention can take place in that the break-out claw is inserted into a sleeve, not shown, of a machine for producing a break-out tool.
  • the sleeve positions the stripping claw until a ram of the machine for producing the stripping tool moves into the sleeve and the stripping claw is driven out of the sleeve and into the stripping tool.
  • the ram hits the ram receptacle and presses the break-out claw into the break-out tool.
  • the plunger receptacle is concave, self-centering of the breakout claw relative to the plunger is achieved.
  • the plunger has a convex shape which moves into the convex shape of the plunger receptacle.
  • Convex here means that the ram receptacle has a curvature towards one end of the breakaway claw.
  • the end of the stripping claw is the area that is first driven into the stripping tool during the automated insertion of the stripping claw.
  • the ram mount of the breakout claw enables a favorable force distribution.
  • the counterpressure of the stripping part increases, namely potential, so that the required parallelism can be restored by yielding the stripping part and the second tip of the stripping claw also penetrates the stripping part.
  • This resilience causes the stripping claw to self-center in relation to the stripping part, which contributes to a significant improvement in the process flow.
  • the curvature runs in a uniform radius around a center point.
  • the idea of the invention should also include other concave bulges, for example it is conceivable that the bulge is more divided and a bulge rises more strongly towards one point than towards the other point.
  • many geometric configurations are possible here.
  • the invention is described in particular with reference to the breakout claw, but it is also possible with a crown pin in that the connection between the tips of the crown pin is also at least partially concave.
  • a breakaway claw 1 according to the invention consists of a material strip 2 which is approximately rectangular.
  • one end 3 is approximately conical, which is used for better insertion into a stripping tool not shown in detail or a part of the stripping tool not shown in detail. Likewise, abutments 4 are used for this insertion.
  • the free end 5 of the breakout claw 1 opposite the end 3 is important. This points between two peaks 6.1 and 6.2 have a concave ram receptacle 7, ie a curvature directed in the direction of the end 3 of the breaker claw 1.
  • This plunger receptacle 7 has a radius r around an imaginary center point M.
  • This center point M lies outside a connecting line V, indicated by dash-dotted lines, between the two tips 6.1 and 6.2, so that the plunger receptacle 7 as a whole is open towards the imaginary center point M.
  • the ram receptacle 7 is particularly important during the automated and mechanical insertion of the stripping claw 1 into the stripping tool.
  • a breakout claw according to the prior art does not have a concave curvature in the form of the ram receptacle 7, but rather a flat surface, since the breakout claw according to the prior art is specially held and driven into the breakout tool with a hammer.
  • the operation of the present invention is as follows:
  • the break-out claw 1 is used, for example, in a sleeve (not shown in detail) of a machine for producing a break-out tool.
  • the sleeve holds the stripping claw 1 until a ram moves into the sleeve and the stripping claw 1 is driven out of the sleeve and into the stripping tool.
  • the ram strikes the ram receptacle 7 and presses the stripping claw 1 and is driven into the stripping tool.
  • the plunger receptacle 7 is concave, self-centering of the breakout claw relative to the plunger is achieved.
  • the plunger has a convex shape which moves into the convex shape of the plunger receptacle.
  • the ram receptacle 7 of the breakout claw 1 enables favorable force distribution. This is achieved in that the convex shape of the plunger transfers the force to the concave shape of the plunger receptacle 7 and thereby enables an advantageous force distribution over the entire breakaway claw because a larger contact surface is made possible.
  • break-out claws 1 work together to break out a break-out part, not shown in detail.
  • the stripping claws 1 are pressed onto the stripping part so that the tips 6.1 and 6.2 penetrate the stripping part. If, for example, there is a slight inclination between the stripping part and the stripping claw 1 or the plate-shaped stripping tool, one of the tips 6.1 or 6.2 penetrates the stripping part in advance.
  • the stripping of the break-out part from the free end 5 of the break-out claw 1 is facilitated by the opening of the plunger receptacle 7 selected due to the radius r, since the horizontal width b of the tip 6.1 or 6.2 potentially increases the deeper the tip 6.1 or 6.2 penetrates into the stripped part.
  • Figure 3 a further exemplary embodiment of a breakout claw 1 according to the invention Figures 1 and 2
  • the features disclosed also apply to the break-out claw 1.
  • the Figure 3 a first bevel 8.1 and a second bevel 8.2.
  • the first bevel 8.1 shows a tapering of the tip 6.1
  • the second bevel 8.2. shows a tapering of the tip 6.2.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Insertion Pins And Rivets (AREA)
  • Punching Or Piercing (AREA)

Description

Die Erfindung betrifft eine Ausbrechkralle nach dem Oberbegriff von Anspruch 1.The invention relates to a breakaway claw according to the preamble of claim 1.

Technisches GebietTechnical area

Die Erfindung betrifft das Gebiet der Ausbrechtechnologie, bei dem aus einer flächigen Werkstoffbahn ein Nutzen, aber insbesondere auch ein Abfall (Ausbrechteil) ausgebrochen wird. Hierzu werden Ausstanzvorrichtungen benutzt, wie sie beispielsweise in der DE 100 23 896 A1 oder der DE 20 2008 012 789 A1 beschrieben sind. Eine großflächige Platte, meist aus Holz, wird als Ausbrechwerkzeug benutzt, in welche an bestimmten Positionen, die sich im Bereich des auszubrechenden Ausbrechteils befinden, Ausbrechkrallen eingesetzt werden. Das Einsetzen der Ausbrechkrallen geschieht mittels eines Hammers und eines dazugehörigen Stifts manuell, die auf eine Angriffsfläche der einzusetzenden Ausbrechkralle einwirken, um diese an einer definierten Position in eine definierte Tiefe des plattenförmigen Ausbrechwerkzeuges einzubringen.The invention relates to the field of stripping technology, in which a panel, but in particular also a waste (stripping part), is broken out of a flat material web. For this purpose, punching devices are used, such as those in DE 100 23 896 A1 or the DE 20 2008 012 789 A1 are described. A large-area plate, usually made of wood, is used as a stripping tool, in which stripping claws are inserted at certain positions in the area of the stripping part to be stripped. The break-out claws are inserted manually by means of a hammer and an associated pin, which act on an attack surface of the break-out claw to be used in order to bring it into a defined position in a defined depth of the plate-shaped break-out tool.

Stand der TechnikState of the art

Von entscheidender Bedeutung ist aber auch die Spitze der Ausbrechkralle, die auf den Nutzen oder den Abfall einwirkt. Hier sind vor allem Kronenstifte oder auch Ausbrechkrallen bekannt und werden beispielsweise in der DE 10 2012 103 858 A1 beschrieben. Der Kronenstift ist zylindrisch, wobei die Spitze rund ausgebildet und mit einer Vielzahl von Zacken belegt ist. Diese Spitze wirkt flächig auf das Ausbrechteil. Einem unkontrollierten Wegkippen des Ausbrechteils während dem Herauslösen aus dem Stanzbogen wird damit entgegengewirkt. Damit wirkt auf das Ausbrechteil deutlich mehr Druck. Negative Einflüsse, wie dicke Haltepunkte, schlechter Messerschnitt oder leicht ungenaues Passen des Stanzbogens werden optimal ausgeglichen.However, the tip of the claw that affects the utility or waste is also of crucial importance. Crown pins or break-out claws are mainly known and are used, for example, in the DE 10 2012 103 858 A1 described. The crown pin is cylindrical, the tip being round and covered with a multitude of spikes. This point has a flat effect on the stripped part. This counteracts an uncontrolled tilting away of the stripped part while it is being removed from the punched sheet. This means that there is significantly more pressure on the stripped part. Negative influences such as thick break points, poor knife cut or slightly imprecise fit of the punched sheet are optimally compensated.

Eine Ausbrechkralle ist dagegen streifenförmig ausgebildet und besitzt eine geradlinige Spitze mit an beiden Seiten angeordneten Zacken. Diese können nur soweit in das Ausbrechteil eindringen, wie sie die geradlinige Spitze überragen. Damit ist beim Eindringen der Spitze dieser Ausbrechkrallen in das Ausbrechteil keine Nachgiebigkeit gegeben, was sich in vielen Anwendungsfällen als negativ herausgestellt hat.A break-out claw, on the other hand, is strip-shaped and has a straight tip with prongs arranged on both sides. These can only penetrate the stripped part as far as they protrude beyond the straight tip. This means that when the tip of these break-out claws penetrate into the break-out part, there is no resilience, which has been found to be negative in many applications.

Aufgabe der ErfindungObject of the invention

Die Aufgabe der vorliegenden Erfindung ist es, die Nachteile aus dem Stand der Technik zu überwinden. Insbesondere soll eine Ausbrechkralle bereitgestellt werden, der wesentlich nachgiebiger und selbstzentrierend ist.The object of the present invention is to overcome the disadvantages of the prior art. In particular, a break-out claw should be provided that is significantly more flexible and self-centering.

Lösung der AufgabeSolution of the task

Zur Lösung der Aufgabe führen die Merkmale nach dem Anspruch 1.The features of claim 1 lead to the solution of the problem.

Im Gegensatz zu der aus dem Stand der Technik bekannten geraden bzw. ebenen Verbindung zwischen den beiden Spitzen, die eine Eindringtiefe der Spitzen in das Ausbrechteil begrenzt, lässt die konkave Wölbung einer Stösselaufnahme eine Variation der Eindringtiefe zu, je nach dem, was für ein Gegendruck aufgebaut wird. Eine Ausbrechkralle nach dem Stand der Technik weist keine konkave Wölbung in Form der Stösselaufnahme 7 auf, sondern eine ebene Fläche, da die Ausbrechkralle nach dem Stand der Technik speziell gehaltert und mit einem Hammer in das Ausbrechwerkzeug getrieben wird. Eine konkave Wölbung wäre insoweit ungünstig. Ist beispielsweise die Ausbrechkralle gegenüber dem Ausbrechteil etwas schräg angestellt, d.h., das Ende der Ausbrechkralle verläuft nicht exakt parallel zu dem Ausbrechteil, so dringt eine Spitze des freien Endes der Ausbrechkralle zuerst in das Ausbrechteil ein.In contrast to the straight or flat connection between the two tips known from the prior art, which limits the depth of penetration of the tips into the break-out part, the concave curvature leaves a Plunger receptacle to a variation of the penetration depth, depending on what counter pressure is built up. A breakout claw according to the prior art does not have a concave curvature in the form of the ram receptacle 7, but rather a flat surface, since the breakout claw according to the prior art is specially held and driven into the breakout tool with a hammer. A concave curvature would be unfavorable in this respect. If, for example, the stripping claw is set at an angle to the stripping part, ie the end of the stripping claw is not exactly parallel to the stripping part, a tip of the free end of the stripping claw first penetrates the stripping part.

Die Stösselaufnahme ist gerade beim automatisierten und maschinellen Einsetzen der Ausbrechkralle in das Ausbrechwerkzeug wichtig. Das automatisierte Einsetzen der erfindungsgemässen Ausbrechkralle kann dadurch erfolgen, dass die Ausbrechkralle in eine nicht gezeigte Hülse einer Maschine zur Herstellung eines Ausbrechwerkzeugs eingesetzt wird.The ram holder is particularly important for the automated and mechanical insertion of the stripping claw into the stripping tool. The automatic insertion of the break-out claw according to the invention can take place in that the break-out claw is inserted into a sleeve, not shown, of a machine for producing a break-out tool.

Die Hülse positioniert die Ausbrechkralle bis ein Stössel der Maschine zur Herstellung des Ausbrechwerkzeugs in die Hülse einfährt und die Ausbrechkralle aus der Hülse und in das Ausbrechwerkzeug eingetrieben wird.The sleeve positions the stripping claw until a ram of the machine for producing the stripping tool moves into the sleeve and the stripping claw is driven out of the sleeve and into the stripping tool.

Dazu schlägt der Stössel in die Stösselaufnahme und drückt die Ausbrechkralle in das Ausbrechwerkzeug eingetrieben wird.To do this, the ram hits the ram receptacle and presses the break-out claw into the break-out tool.

Dadurch, dass die Stösselaufnahme konkav ausgebildet ist, wird eine Selbstzentrierung der Ausbrechkralle zu dem Stössel erreicht. Der Stössel weist dazu eine konvexe Form auf, welche in die konvexe Form der Stösselaufnahme einfährt. Konvex bedeutet hierbei, dass die Stösselaufnahme eine Wölbung zu einem Ende der Ausbrechkralle hin aufweist. Das Ende der Ausbrechkralle ist der Bereich, der beim automatisierten Einsetzen der Ausbrechkralle als erstes in das Ausbrechwerkzeug eingetrieben wird.Because the plunger receptacle is concave, self-centering of the breakout claw relative to the plunger is achieved. To this end, the plunger has a convex shape which moves into the convex shape of the plunger receptacle. Convex here means that the ram receptacle has a curvature towards one end of the breakaway claw. The end of the stripping claw is the area that is first driven into the stripping tool during the automated insertion of the stripping claw.

Dadurch wird nicht nur eine Selbstzentrierung erreicht, sondern auch eine günstige Kraftaufnahme der Ausbrechkralle durch den Stössel. Die Stösselaufnahme der Ausbrechkralle ermöglicht eine günstige Kraftverteilung.As a result, not only is self-centering achieved, but also a favorable force absorption of the breakaway claw by the ram. The ram mount of the breakout claw enables a favorable force distribution.

Dies wird dadurch erreicht, dass die konvexe Form des Stössels die Kraft auf die konkave Form der Stösselaufnahme überträgt und dabei eine vorteilhafte Kraftverteilung auf die gesamte Ausbrechkralle ermöglicht, weil eine grössere Angriffsfläche ermöglicht wird.This is achieved in that the convex shape of the plunger transfers the force to the concave shape of the plunger receptacle and thereby enables an advantageous force distribution over the entire breakaway claw because a larger contact surface is made possible.

Infolge der Wölbung und der damit einhergehenden Vergrößerung der Breite der eingedrungenen Spitze erhöht sich der Gegendruck des Ausbrechteils, und zwar potential, so dass durch ein Nachgeben des Ausbrechteils die erforderliche Parallelität wieder hergestellt werden kann und auch die zweite Spitze der Ausbrechkralle in das Ausbrechteil eindringt. Diese Nachgiebigkeit bewirkt ein Selbstzentrieren der Ausbrechkralle gegenüber dem Ausbrechteil, was zu einer wesentlichen Verbesserung des Prozessablaufes beiträgt.As a result of the curvature and the associated enlargement of the width of the penetrated tip, the counterpressure of the stripping part increases, namely potential, so that the required parallelism can be restored by yielding the stripping part and the second tip of the stripping claw also penetrates the stripping part. This resilience causes the stripping claw to self-center in relation to the stripping part, which contributes to a significant improvement in the process flow.

Gleichzeitig wird aber auch ein Abstreifen des Ausbrechteils von der Ausbrechkralle erleichtert, da sich die Breite der Spitze nicht kontinuierlich, sondern durch die Wölbung potentiell erhöht. Beim Herausziehen der Spitze aus dem Ausbrechteil erfolgt so ein wesentlich schnelleres Lösen der Spitze von dem Ausbrechteil.At the same time, however, stripping off the break-out part from the break-out claw is also facilitated, since the width of the tip does not increase continuously, but potentially increases due to the curvature. When the tip is pulled out of the break-out part, the tip is released from the break-out part much more quickly.

Vorteilhafte Ausgestaltungen sind in den Unteransprüchen beschrieben.Advantageous embodiments are described in the subclaims.

Vor allem ist bevorzugt daran gedacht, dass die Wölbung in einem gleichmässigen Radius um einen Mittelpunkt herum verläuft. Allerdings sollen vom Erfindungsgedanken auch andere konkave Wölbungen umfasst sein, beispielsweise ist denkbar, dass die Wölbung mehrgeteilt ist und eine Wölbung zu einer Spitze stärker ansteigt, als zur anderen Spitze. Hier sind aber viele geometrische Ausgestaltungen möglich.Above all, it is preferred that the curvature runs in a uniform radius around a center point. However, the idea of the invention should also include other concave bulges, for example it is conceivable that the bulge is more divided and a bulge rises more strongly towards one point than towards the other point. However, many geometric configurations are possible here.

Die Erfindung wird insbesondere in Bezug auf die Ausbrechkralle beschrieben, sie ist aber auch bei einem Kronenstift möglich, indem die Verbindung zwischen den Spitzen des Kronenstifts ebenfalls zumindest zum Teil konkav gewölbt ist.The invention is described in particular with reference to the breakout claw, but it is also possible with a crown pin in that the connection between the tips of the crown pin is also at least partially concave.

FigurenbeschreibungFigure description

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnungen; diese zeigen in:

Figur 1
eine Draufsicht auf eine erfindungsgemässe Ausbrechkralle;
Figur 2
eine perspektivische Seitenansicht der Ausbrechkralle nach Figur 1;
Figur 3
eine perspektivische Seitenansicht eines anderen Ausführungsbeispiels einer erfindungsgemässen Ausbrechkralle.
Further advantages, features and details of the invention emerge from the following description of preferred exemplary embodiments and with reference to the drawings; these show in:
Figure 1
a plan view of a breakout claw according to the invention;
Figure 2
a perspective side view of the breaker claw according to Figure 1 ;
Figure 3
a perspective side view of another embodiment of a breakout claw according to the invention.

AusführungsbeispielEmbodiment

Bezugnehmend auf Figur 1 und 2 besteht eine erfindungsgemässe Ausbrechkralle 1 aus einem Werkstoffstreifen 2, der in etwa rechteckförmig ausgebildet ist.Referring to Figures 1 and 2 a breakaway claw 1 according to the invention consists of a material strip 2 which is approximately rectangular.

Sein eines Ende 3 ist etwa konisch ausgestaltet, was dem besseren Einsetzen in ein nicht näher gezeigtes Ausbrechwerkzeug bzw. einen nicht näher gezeigten Teil des Ausbrechwerkzeuges dient. Gleichfalls dienen Widerlager 4 diesem Einsetzen.Its one end 3 is approximately conical, which is used for better insertion into a stripping tool not shown in detail or a part of the stripping tool not shown in detail. Likewise, abutments 4 are used for this insertion.

Gerade die Widerlager 4 sollen nach dem Einsetzen der Ausbrechkralle 1 in das Ausbrechwerkzeug verhindern, dass die Ausbrechkralle 1 aus dem herkömmlicherweise aus Holz hergestellten Ausbrechwerkzeug herausgleitet.It is precisely the abutment 4, after the breakout claw 1 has been inserted into the breakout tool, to prevent the breakout claw 1 from sliding out of the breakout tool, which is conventionally made of wood.

Für die vorliegende Erfindung ist allerdings das dem Ende 3 gegenüberliegende freie Ende 5 der Ausbrechkralle 1 wichtig. Dieses weist zwischen zwei Spitzen 6.1 und 6.2 eine konkave Stösselaufnahme 7 auf, d.h. einer in Richtung des Endes 3 der Ausbrechkralle 1 gerichteten Wölbung.For the present invention, however, the free end 5 of the breakout claw 1 opposite the end 3 is important. This points between two peaks 6.1 and 6.2 have a concave ram receptacle 7, ie a curvature directed in the direction of the end 3 of the breaker claw 1.

Diese Stösselaufnahme 7 hat einen Radius r um einen gedachten Mittelpunkt M. Dieser Mittelpunkt M liegt ausserhalb einer strichpunktiert angedeuteten Verbindungslinie V zwischen den beiden Spitzen 6.1 und 6.2, so dass die Stösselaufnahme 7 insgesamt zu dem gedachten Mittelpunkt M hin geöffnet verläuft.This plunger receptacle 7 has a radius r around an imaginary center point M. This center point M lies outside a connecting line V, indicated by dash-dotted lines, between the two tips 6.1 and 6.2, so that the plunger receptacle 7 as a whole is open towards the imaginary center point M.

Die Stösselaufnahme 7 ist gerade beim automatisierten und maschinellen Einsetzen der Ausbrechkralle 1 in das Ausbrechwerkzeug wichtig. Eine Ausbrechkralle nach dem Stand der Technik weist keine konkave Wölbung in Form der Stösselaufnahme 7 auf, sondern eine ebene Fläche, da die Ausbrechkralle nach dem Stand der Technik speziell gehaltert und mit einem Hammer in das Ausbrechwerkzeug getrieben wird.The ram receptacle 7 is particularly important during the automated and mechanical insertion of the stripping claw 1 into the stripping tool. A breakout claw according to the prior art does not have a concave curvature in the form of the ram receptacle 7, but rather a flat surface, since the breakout claw according to the prior art is specially held and driven into the breakout tool with a hammer.

Die Funktionsweise der vorliegenden Erfindung ist Folgende:
Die Ausbrechkralle 1 wird in beispielsweise eine nicht näher gezeigte Hülse einer Maschine zur Herstellung eines Ausbrechwerkzeugs eingesetzt. Die Hülse haltert die Ausbrechkralle 1 bis ein Stössel in die Hülse einfährt und die Ausbrechkralle 1 aus der Hülse und in das Ausbrechwerkzeug eingetrieben wird.The operation of the present invention is as follows:
The break-out claw 1 is used, for example, in a sleeve (not shown in detail) of a machine for producing a break-out tool. The sleeve holds the stripping claw 1 until a ram moves into the sleeve and the stripping claw 1 is driven out of the sleeve and into the stripping tool.

Dazu schlägt der Stössel in die Stösselaufnahme 7 und drückt die Ausbrechkralle 1 und in das Ausbrechwerkzeug eingetrieben wird.For this purpose, the ram strikes the ram receptacle 7 and presses the stripping claw 1 and is driven into the stripping tool.

Dadurch, dass die Stösselaufnahme 7 konkav ausgebildet ist, wird eine Selbstzentrierung der Ausbrechkralle zu dem Stössel erreicht. Der Stössel weist dazu eine konvexe Form auf, welche in die konvexe Form der Stösselaufnahme einfährt. Dadurch wird nicht nur eine Selbstzentrierung erreicht, sondern auch eine günstige Kraftaufnahme der Ausbrechkralle 1 durch den Stössel. Die Stösselaufnahme 7 der Ausbrechkralle 1 ermöglicht eine günstige Kraftverteilung. Dies wird dadurch erreicht, dass die konvexe Form des Stössels die Kraft auf die konkave Form der Stösselaufnahme 7 überträgt und dabei eine vorteilhafte Kraftverteilung auf die gesamte Ausbrechkralle ermöglicht, weil eine grössere Angriffsfläche ermöglicht wird.Because the plunger receptacle 7 is concave, self-centering of the breakout claw relative to the plunger is achieved. To this end, the plunger has a convex shape which moves into the convex shape of the plunger receptacle. As a result, not only is self-centering achieved, but also a favorable force absorption of the break-out claw 1 by the ram. The The ram receptacle 7 of the breakout claw 1 enables favorable force distribution. This is achieved in that the convex shape of the plunger transfers the force to the concave shape of the plunger receptacle 7 and thereby enables an advantageous force distribution over the entire breakaway claw because a larger contact surface is made possible.

Eine Mehrzahl dieser Ausbrechkrallen 1 wirken zum Ausbrechen eines nicht näher gezeigten Ausbrechteils zusammen.A plurality of these break-out claws 1 work together to break out a break-out part, not shown in detail.

Die Ausbrechkrallen 1 werden auf das Ausbrechteil aufgedrückt, so dass die Spitzen 6.1 und 6.2 in das Ausbrechteil eindringen. Sollte beispielsweise eine geringfügige Schrägstellung zwischen Ausbrechteil und Ausbrechkralle 1 bzw. plattenförmigem Ausbrechwerkzeug vorhanden sein, so dringt eine der Spitzen 6.1 oder 6.2 vorlaufend in das Ausbrechteil ein.The stripping claws 1 are pressed onto the stripping part so that the tips 6.1 and 6.2 penetrate the stripping part. If, for example, there is a slight inclination between the stripping part and the stripping claw 1 or the plate-shaped stripping tool, one of the tips 6.1 or 6.2 penetrates the stripping part in advance.

Da sich aber eine Breite b der Spitze infolge der konkaven Stösselaufnahme 7 erhöht, verstärkt sich auch der Gegendruck, so dass das Ausbrechteil nachgeben und die zweite Spitze 6.2 oder 6.1 in das Ausbrechteil eindringen kann. Dies wird als selbstzentrierend bezeichnet.However, since a width b of the tip increases as a result of the concave plunger receptacle 7, the counterpressure also increases, so that the break-out part yields and the second tip 6.2 or 6.1 can penetrate into the break-out part. This is known as self-centering.

Andererseits wird ein Abstreifen des Ausbrechteils von dem freien Ende 5 der Ausbrechkralle 1 durch die infolge des Radius r gewählte Öffnung der Stösselaufnahme 7 erleichtert, da sich die waagrechte Breite b der Spitze 6.1 bzw. 6.2 potentiell erhöht, je tiefer die Spitze 6.1 bzw. 6.2 in das Ausbrechteil eindringt.On the other hand, the stripping of the break-out part from the free end 5 of the break-out claw 1 is facilitated by the opening of the plunger receptacle 7 selected due to the radius r, since the horizontal width b of the tip 6.1 or 6.2 potentially increases the deeper the tip 6.1 or 6.2 penetrates into the stripped part.

Ausserdem wird in Figur 3 ein weiteres Ausführungsbeispiel einer erfindungsgemässen Ausbrechkralle 1. Die in den Figuren 1 und 2 offenbarten Merkmale gelten auch für die Ausbrechkralle 1. Insbesondere dann, wenn die gleichen Bezugsziffern in den Figuren 1 und 2 und der Figur 3 genutzt wurden. Ergänzend wird in der Figur 3 eine erste Abschrägung 8.1 und eine zweite Abschrägung 8.2. Die erste Abschrägung 8.1 zeigt eine Zuspitzung der Spitze 6.1 und die zweite Abschrägung 8.2. zeigt eine Zuspitzung der Spitze 6.2. Diese Zuspitzungen sind derart, dass zum Einen eine Abschrägung der Seitenkanten zu dem Punkt M erfolgt und zum Anderen eine Abflachung des Werkstoffstreifens 2 zu den jeweiligen Spitzen 6.1, 6.2. Bezugszeichenliste 1 Ausbrechkralle 34 2 Werkstoffstreifen 35 3 Ende 36 4 Widerlager 37 5 freies Ende 38 6 Spitze 39 7 Stösselaufnahme 40 8 Abschrägung 41 9 42 10 43 11 44 12 45 13 46 14 47 15 48 16 49 17 50 18 51 19 52 20 53 21 54 22 55 23 56 24 57 b Breite 25 58 26 59 27 60 M Mittelpunkt 28 61 29 62 30 63 r Radius 31 64 32 65 V Verbindungslinie 33 66 In addition, in Figure 3 a further exemplary embodiment of a breakout claw 1 according to the invention Figures 1 and 2 The features disclosed also apply to the break-out claw 1. In particular when the same reference numerals are used in Figures 1 and 2 and the Figure 3 were used. In addition, the Figure 3 a first bevel 8.1 and a second bevel 8.2. The first bevel 8.1 shows a tapering of the tip 6.1 and the second bevel 8.2. shows a tapering of the tip 6.2. These tapering are such that, on the one hand, the side edges are bevelled towards point M and, on the other hand, the material strip 2 is flattened towards the respective points 6.1, 6.2. <b> List of reference symbols </b> 1 Breakaway claw 34 2 Strip of material 35 3 The End 36 4th Abutment 37 5 free end 38 6th top 39 7th Ram mount 40 8th bevel 41 9 42 10 43 11 44 12th 45 13 46 14th 47 15th 48 16 49 17th 50 18th 51 19th 52 20th 53 21st 54 22nd 55 23 56 24 57 b width 25th 58 26th 59 27 60 M. Focus 28 61 29 62 30th 63 r radius 31 64 32 65 V Connecting line 33 66

Claims (6)

  1. Stripping claw for automated insertion into a stripping tool which is intended for stripping a stripping part from a flat workpiece, wherein the stripping claw has at least two tips (6.1, 6.2) for placing on the stripping part,
    characterised in that,
    a ram receiver (7) is formed in a concave manner between the two tips (6.1, 6.2).
  2. Stripping claw according to claim 1, characterised in that the concave ram receiver (7) has a radius (r) about a centre (M).
  3. Stripping claw according to claim 2, characterised in that the centre point (M) is located beyond a connecting line (V) between the tips (6.1, 6.2).
  4. Stripping claw according to any one of the previous claims, characterised in that an end (3) is present which comprises an abutment (4).
  5. Stripping claw according to claim 4, characterised in that a material strip (2) has the end (3) at one end and a free end (5) at the other end.
  6. Stripping claw according to claim 5, characterised in that the free end (5) comprises the two tips (6.1, 6.2) and the ram receiver (7).
EP18700580.6A 2017-01-18 2018-01-16 Stripper strip Active EP3571028B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017100900.0A DE102017100900A1 (en) 2017-01-18 2017-01-18 Ausbrechkralle
PCT/EP2018/050913 WO2018134161A1 (en) 2017-01-18 2018-01-16 Stripping claw

Publications (2)

Publication Number Publication Date
EP3571028A1 EP3571028A1 (en) 2019-11-27
EP3571028B1 true EP3571028B1 (en) 2020-09-23

Family

ID=60997493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18700580.6A Active EP3571028B1 (en) 2017-01-18 2018-01-16 Stripper strip

Country Status (6)

Country Link
US (1) US20190337181A1 (en)
EP (1) EP3571028B1 (en)
CN (1) CN110198817B (en)
DE (1) DE102017100900A1 (en)
ES (1) ES2846179T3 (en)
WO (1) WO2018134161A1 (en)

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DE9116425U1 (en) * 1991-07-19 1992-10-08 Karl Marbach Gmbh & Co, 7100 Heilbronn, De
DE9214557U1 (en) * 1992-10-27 1992-12-17 Karl Marbach Gmbh & Co, 7100 Heilbronn, De
GB9316126D0 (en) * 1993-08-04 1993-09-22 Gardiner Richard A pneumatic ejector
DE19543642C2 (en) * 1995-11-23 2001-03-29 Opel Adam Ag Method for producing an opening in a trim part and trim part designed for carrying out the method
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DE102008062114A1 (en) * 2008-12-16 2010-06-17 Joachim Jakob Device for inserting a breakout pin into a breakout tool
CN201579816U (en) * 2009-11-30 2010-09-15 苏州太湖度假区安洁绝缘材料有限公司 Automatic waste discharging device for stamped products made of thin insulating material
DE202010004552U1 (en) * 2010-04-01 2010-08-05 Silcoplan Engineering Gmbh Disassembling pin and stripping tool with breakout pin
DE202010006740U1 (en) 2010-05-12 2010-09-23 Silcoplan Engineering Gmbh Stripping system, stripping system assortment and setting tool
DE102012103858B4 (en) 2011-12-05 2024-01-25 Boxplan Gmbh Device and method for producing a stripping tool
DE102015110972A1 (en) 2015-07-07 2017-01-12 Franz Vossen Counterpart device for a device for removing break-away parts and device for removing break-away parts
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Also Published As

Publication number Publication date
WO2018134161A1 (en) 2018-07-26
CN110198817B (en) 2021-12-03
ES2846179T3 (en) 2021-07-28
US20190337181A1 (en) 2019-11-07
DE102017100900A1 (en) 2018-07-19
CN110198817A (en) 2019-09-03
EP3571028A1 (en) 2019-11-27

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