EP3571028A1 - Stripping claw - Google Patents

Stripping claw

Info

Publication number
EP3571028A1
EP3571028A1 EP18700580.6A EP18700580A EP3571028A1 EP 3571028 A1 EP3571028 A1 EP 3571028A1 EP 18700580 A EP18700580 A EP 18700580A EP 3571028 A1 EP3571028 A1 EP 3571028A1
Authority
EP
European Patent Office
Prior art keywords
ausbrechkralle
plunger
tip
ausbrechteil
tips
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
EP18700580.6A
Other languages
German (de)
French (fr)
Other versions
EP3571028B1 (en
Inventor
Tobias Jakob
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.)
Boxplan GmbH and Co KG
Original Assignee
Boxplan GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Boxplan GmbH and Co KG filed Critical Boxplan GmbH and Co KG
Publication of EP3571028A1 publication Critical patent/EP3571028A1/en
Application granted granted Critical
Publication of EP3571028B1 publication Critical patent/EP3571028B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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 Ausbrechkralle according to the preamble of claim 1.
  • the invention relates to the field of Ausbrechtechnologie, in which a benefit of a flat web of material, but in particular a waste (Ausbrechteil) is broken.
  • punching devices are used, as described for example in DE 100 23 896 A1 or DE 20 2008 012 789 A1.
  • a large plate, usually made of wood, is used as a stripping tool, in which at certain positions, which are located in the region of the Ausbrechteil and mecanicden breakout claws are used.
  • the insertion of the Ausbrechkrallen done by means of a hammer and an associated pin manually, which act on an attack surface of Ausbrechkralle to be used to introduce them at a defined position in a defined depth of the plate-shaped stripping tool.
  • crown pins or breakout claws are known here and are described, for example, in DE 10 2012 103 858 A1.
  • the crown pin is cylindrical, the tip being round and covered with a large number of points. This tip acts flat on the Ausbrechteil. An uncontrolled tilting of the Ausbrechteils during the extraction from the punching sheet is thus counteracted. This significantly affects the stripping part more pressure. Negative influences, such as thick breakpoints, poor knife cutting or slightly inaccurate fitting of the punching sheet are optimally compensated.
  • a Ausbrechkralle is strip-shaped and has a straight tip with arranged on both sides teeth. These can only penetrate as far into the Ausbrechteil as they protrude beyond the rectilinear tip. This is given when penetrating the tip of Ausschrechkrallen in the Ausbrechteil no compliance, which has been found in many applications to be negative.
  • the object of the present invention is to overcome the disadvantages of the prior art.
  • a Ausbrechkralle should be provided, which is much more yielding and self-centering.
  • the plunger holder is important in automated and mechanical insertion of Ausbrechkralle in the stripping tool.
  • the automated insertion of the breakout claw according to the invention can take place in that the breakout claw is inserted into a sleeve, not shown, of a machine for producing a breakout tool.
  • the sleeve positions the Ausbrechkralle until a ram of the machine for producing the Ausbrechwerkmaschines enters the sleeve and the Ausbrechkralle is driven out of the sleeve and into the stripping tool.
  • the plunger strikes the plunger receptacle and presses the Ausbrechkralle is driven into the stripping tool.
  • the plunger has to have a convex shape, which enters the convex shape of the plunger receptacle. Convex here means that the plunger seat has a curvature towards one end of the Ausbrechkralle out.
  • the end of the Ausbrechkralle is the area that is driven in the automated insertion of Ausbrechkralle first in the stripping tool.
  • the plunger mount of Ausbrechkralle allows a favorable power distribution. This is achieved in that the convex shape of the plunger transmits the force to the concave shape of the plunger receptacle and thereby allows an advantageous distribution of force on the entire Ausbrechkralle because a larger attack surface is made possible.
  • the curvature extends in a uniform radius around a center.
  • other concave curvatures are to be encompassed by the idea of the invention, for example, it is conceivable that the curvature is divided more and a curvature rises more sharply to one tip than to the other tip. But here are many geometrical configurations possible.
  • the invention is described in particular with respect to the Ausbrechkralle, but it is also possible with a crown pin by the connection between the tips of the crown pin is also at least partially concave.
  • Figure 1 is a plan view of an inventive Ausbrechkralle
  • FIG. 1 is a side perspective view of the Ausbrechkralle of FIG.
  • an Ausbrechkralle 1 according to the invention consists of a strip of material 2, which is formed approximately rectangular.
  • one end 3 is approximately conical, which serves the better insertion into a stripping tool not shown in more detail or a not shown detail of the stripping tool. Likewise abutment 4 serve this insertion.
  • This ram receptacle 7 has a radius r around an imaginary center point M. This midpoint M lies outside of a dash-dotted line V between the two peaks 6.1 and 6.2, so that the plunger seat 7 extends in total to the imaginary center point M out.
  • the plunger receptacle 7 is especially important in the automated and mechanical insertion of Ausbrechkralle 1 in the stripping.
  • a Ausbrechkralle according to the prior art has no concave curvature in the form of the plunger seat 7, but a flat surface, since the Ausbrechkralle is specially supported according to the prior art and driven with a hammer into the stripping tool.
  • the Ausbrechkralle 1 is used in, for example, a not shown sleeve of a machine for producing a stripping tool.
  • the sleeve holds the breakout claw 1 until a ram enters the sleeve and the breakout claw 1 is driven out of the sleeve and into the breakout tool.
  • the plunger strikes in the plunger receptacle 7 and presses the Ausbrechkralle 1 and is driven into the stripping tool.
  • the plunger has to have a convex shape, which enters the convex shape of the plunger receptacle.
  • a self-centering is achieved, but also a favorable power consumption of Ausbrechkralle 1 by the plunger.
  • the Stumbleelability 7 Ausbrechkralle 1 allows a favorable power distribution. This is achieved in that the convex shape of the plunger transmits the force to the concave shape of the plunger receptacle 7 and thereby allows an advantageous distribution of force on the entire Ausbrechkralle because a larger attack surface is made possible.
  • a plurality of Ausbrechkrallen 1 cooperate to break out of a Ausbrechteils not shown in detail.
  • the Ausbrechkrallen 1 are pressed onto the Ausbrechteil, so that the tips penetrate 6.1 and 6.2 in the Ausbrechteil. For example, if a slight inclination between Ausbrechteil and Ausbrechkralle 1 or plate-shaped stripping tool be present, so penetrates one of the tips 6.1 or 6.2 leading into the Ausbrechteil.
  • FIG. 3 shows a further exemplary embodiment of a breakout claw 1 according to the invention.
  • the features disclosed in FIGS. 1 and 2 also apply to the breakout claw 1.
  • the first chamfer 8.1 shows a tapering of the tip 6.1
  • the second chamfer 8.2. shows a taper of the tip 6.2.

Landscapes

  • 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)
  • Punching Or Piercing (AREA)
  • Insertion Pins And Rivets (AREA)

Abstract

The invention relates to a stripping claw for insertion into a stripping tool, which is intended to strip a break-off part from a planar workpiece and comprises at least two tips (6.1, 6.2) to be placed onto the break-off part. According to the invention, the region between the two tips (6.1, 6.2) has a concave design.

Description

Ausbrechkralle  Ausbrechkralle
Die Erfindung betrifft eine Ausbrechkralle nach dem Oberbegriff von Anspruch 1 . The invention relates to a Ausbrechkralle according to the preamble of claim 1.
Technisches Gebiet Technical 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 Ausbrechtechnologie, in which a benefit of a flat web of material, but in particular a waste (Ausbrechteil) is broken. For this purpose, punching devices are used, as described for example in DE 100 23 896 A1 or DE 20 2008 012 789 A1. A large plate, usually made of wood, is used as a stripping tool, in which at certain positions, which are located in the region of the Ausbrechteil auszubrechenden breakout claws are used. The insertion of the Ausbrechkrallen done by means of a hammer and an associated pin manually, which act on an attack surface of Ausbrechkralle to be used to introduce them at a defined position in a defined depth of the plate-shaped stripping tool.
Stand der Technik 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. State of the art However, the tip of the breakout claw, which affects the use or the waste, is also of crucial importance. In particular, crown pins or breakout claws are known here and are described, for example, in DE 10 2012 103 858 A1. The crown pin is cylindrical, the tip being round and covered with a large number of points. This tip acts flat on the Ausbrechteil. An uncontrolled tilting of the Ausbrechteils during the extraction from the punching sheet is thus counteracted. This significantly affects the stripping part more pressure. Negative influences, such as thick breakpoints, poor knife cutting or slightly inaccurate fitting of the punching 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. Aufgabe der Erfindung A Ausbrechkralle, however, is strip-shaped and has a straight tip with arranged on both sides teeth. These can only penetrate as far into the Ausbrechteil as they protrude beyond the rectilinear tip. This is given when penetrating the tip of Ausschrechkrallen in the Ausbrechteil no compliance, which has been found in many applications to be negative. Object 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 Ausbrechkralle should be provided, which is much more yielding and self-centering.
Lösung der Aufgabe Solution of the task
Zur Lösung der Aufgabe führen die Merkmale nach dem Anspruch 1 . 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. To achieve the object, the features according to claim 1. In contrast to the known from the prior art straight or planar connection between the two tips, which limits a penetration depth of the tips in the Ausbrechteil, leaves the concave curvature of a Pusher receiving a variation of the penetration depth, depending on what is built up for a back pressure. A Ausbrechkralle according to the prior art has no concave curvature in the form of the plunger seat 7, but a flat surface, since the Ausbrechkralle is specially supported according to the prior art and driven with a hammer into the stripping tool. A concave curvature would be unfavorable. For example, if the Ausbrechkralle against the Ausbrechteil made somewhat obliquely, ie, the end of the Ausbrechkralle is not exactly parallel to the Ausbrechteil, so penetrates a tip of the free end of the Ausbrechkralle first in the Ausbrechteil.
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 plunger holder is important in automated and mechanical insertion of Ausbrechkralle in the stripping tool. The automated insertion of the breakout claw according to the invention can take place in that the breakout claw is inserted into a sleeve, not shown, of a machine for producing a breakout 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 Ausbrechkralle until a ram of the machine for producing the Ausbrechwerkzeugs enters the sleeve and the Ausbrechkralle 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. 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. 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. 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. 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. For this purpose, the plunger strikes the plunger receptacle and presses the Ausbrechkralle is driven into the stripping tool. The fact that the plunger receptacle is concave, a self-centering of the Ausbrechkralle is achieved to the plunger. The plunger has to have a convex shape, which enters the convex shape of the plunger receptacle. Convex here means that the plunger seat has a curvature towards one end of the Ausbrechkralle out. The end of the Ausbrechkralle is the area that is driven in the automated insertion of Ausbrechkralle first in the stripping tool. As a result, not only a self-centering is achieved, but also a favorable force absorption of the Ausbrechkralle by the plunger. The plunger mount of Ausbrechkralle allows a favorable power distribution. This is achieved in that the convex shape of the plunger transmits the force to the concave shape of the plunger receptacle and thereby allows an advantageous distribution of force on the entire Ausbrechkralle because a larger attack surface is made possible. Due to the curvature and the concomitant increase in the width of the penetrated tip, the back pressure of Ausbrechteils, and that potential increases, so that the yielding of the Ausbrechteils the required parallelism can be restored and also the second tip of the Ausbrechkralle penetrates into the Ausbrechteil. This flexibility causes a Selbstzentrieren the Ausschrechkralle against the Ausbrechteil, 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, a stripping of the Ausbrechteils is facilitated by the Ausbrechkralle because the width of the tip is not continuous, but potentially increased by the curvature. When pulling out the tip of the Ausbrechteil so a much faster release of the tip of the Ausbrechteil.
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. 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. Above all, it is preferably thought that the curvature extends in a uniform radius around a center. However, other concave curvatures are to be encompassed by the idea of the invention, for example, it is conceivable that the curvature is divided more and a curvature rises more sharply to one tip than to the other tip. But here are many geometrical configurations possible. The invention is described in particular with respect to the Ausbrechkralle, but it is also possible with a crown pin by the connection between the tips of the crown pin is also at least partially concave.
Figurenbeschreibung figure description
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnungen; diese zeigen in: Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawings; these show in:
Figur 1 eine Draufsicht auf eine erfindungsgemässe Ausbrechkralle; Figure 1 is a plan view of an inventive Ausbrechkralle;
Figur 2 eine perspektivische Seitenansicht der Ausbrechkralle nach Figur Figure 2 is a side perspective view of the Ausbrechkralle of FIG
1 ; eine perspektivische Seitenansicht eines anderen Ausführungsbeispiels einer erfindungsgemässen Ausbrechkralle. Ausführungsbeispiel  1 ; a perspective side view of another embodiment of an inventive Ausbrechkralle. embodiment
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, an Ausbrechkralle 1 according to the invention consists of a strip of material 2, which is formed 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 serves the better insertion into a stripping tool not shown in more detail or a not shown detail of the stripping tool. Likewise abutment 4 serve 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. 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 Stösselaufnalime 7 auf, d.h. einer in Richtung des Endes 3 der Ausbrechkralle 1 gerichteten Wölbung. Just the abutment 4 to prevent the insertion of the Ausbrechkralle 1 in the stripping, that the Ausbrechkralle 1 slides out of the traditionally made of wood stripping. For the present invention, however, the end 3 opposite free end 5 of Ausbrechkralle 1 is important. This points between two peaks 6.1 and 6.2, a concave Stößelaufnalime 7, ie a directed towards the end 3 of Ausbrechkralle 1 curvature.
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. 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. This ram receptacle 7 has a radius r around an imaginary center point M. This midpoint M lies outside of a dash-dotted line V between the two peaks 6.1 and 6.2, so that the plunger seat 7 extends in total to the imaginary center point M out. The plunger receptacle 7 is especially important in the automated and mechanical insertion of Ausbrechkralle 1 in the stripping. A Ausbrechkralle according to the prior art has no concave curvature in the form of the plunger seat 7, but a flat surface, since the Ausbrechkralle is specially supported according to the prior art and driven with a hammer into the stripping tool.
Die Funktionsweise der vorliegenden Erfindung ist Folgende: The operation of the present invention is as follows:
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. Dazu schlägt der Stössel in die Stösselaufnahme 7 und drückt die Ausbrechkralle 1 und in das Ausbrechwerkzeug eingetrieben wird. The Ausbrechkralle 1 is used in, for example, a not shown sleeve of a machine for producing a stripping tool. The sleeve holds the breakout claw 1 until a ram enters the sleeve and the breakout claw 1 is driven out of the sleeve and into the breakout tool. For this purpose, the plunger strikes in the plunger receptacle 7 and presses the Ausbrechkralle 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. The fact that the plunger receptacle 7 is concave, a self-centering of the Ausbrechkralle is achieved to the plunger. The plunger has to have a convex shape, which enters the convex shape of the plunger receptacle. As a result, not only a self-centering is achieved, but also a favorable power consumption of Ausbrechkralle 1 by the plunger. The Stößelaufnahme 7 Ausbrechkralle 1 allows a favorable power distribution. This is achieved in that the convex shape of the plunger transmits the force to the concave shape of the plunger receptacle 7 and thereby allows an advantageous distribution of force on the entire Ausbrechkralle because a larger attack surface is made possible.
Eine Mehrzahl dieser Ausbrechkrallen 1 wirken zum Ausbrechen eines nicht näher gezeigten Ausbrechteils zusammen. 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. A plurality of Ausbrechkrallen 1 cooperate to break out of a Ausbrechteils not shown in detail. The Ausbrechkrallen 1 are pressed onto the Ausbrechteil, so that the tips penetrate 6.1 and 6.2 in the Ausbrechteil. For example, if a slight inclination between Ausbrechteil and Ausbrechkralle 1 or plate-shaped stripping tool be present, so penetrates one of the tips 6.1 or 6.2 leading into the Ausbrechteil.
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 back pressure 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 called 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, stripping the Ausbrechteils of the free end 5 of the Ausbrechkralle 1 is facilitated by the radius r selected opening of the plunger receptacle 7, 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 Ausbrechteil.
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. In addition, FIG. 3 shows a further exemplary embodiment of a breakout claw 1 according to the invention. The features disclosed in FIGS. 1 and 2 also apply to the breakout claw 1. In particular, when the same reference numerals have been used in Figures 1 and 2 and Figure 3. In addition, in FIG. 3, a first bevel 8.1 and a second bevel 8.2. The first chamfer 8.1 shows a tapering of the tip 6.1 and the second chamfer 8.2. shows a taper of the tip 6.2. These tapering points are such that on the one hand a chamfer of the side edges to the point M takes place and on the other hand a flattening of the material strip 2 to the respective tips 6.1, 6.2.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
Ausbrechkralle 34 Break-out claw 34
Werkstoffstreifen 35  Material strip 35
Ende 36  Late 36
Widerlager 37  Abutment 37
freies Ende 38 free end 38
Spitze 39  Tip 39
Stösselaufnahme 40  Plunger holder 40
Abschrägung 41  Bevel 41
42  42
43  43
44  44
45  45
46  46
47  47
48  48
49  49
50  50
51  51
52  52
53  53
54  54
55  55
56  56
57 b Breite  57b width
58  58
59  59
60 M Mittelpunkt 60 M center point
61 61
62  62
63 r Radius  63 r radius
64  64
65 V Verbindungslinie 65 V connecting line
66 66

Claims

Patentansprüche claims
1 . Ausbrechkralle zum automatisierten Einsetzen in ein Ausbrechwerkzeug, welches zum Ausbrechen eines Ausbrechteils aus einem flächigen Werkstück bestimmt ist und zumindest zwei Spitzen (6.1 , 6.2) zum Aufsetzen auf das Ausbrechteil aufweist, dadurch gekennzeichnet, dass eine Stösselaufnahme (7) zwischen den beiden Spitzen (6.1 , 6.2) konkav ausgebildet ist. 1 . Ausbrechkralle for automated insertion into a stripping tool, which is intended for breaking a Ausbrechteils from a flat workpiece and at least two tips (6.1, 6.2) for placement on the Ausbrechteil, characterized in that a plunger receptacle (7) between the two tips (6.1 , 6.2) is concave.
2. Ausbrechkralle nach Anspruch 1 , dadurch gekennzeichnet, dass die konkave Stösselaufnahme (7) einen Radius (r) um einem Mittelpunkt (M) besitzt. 2. Ausbrechkralle according to claim 1, characterized in that the concave plunger receptacle (7) has a radius (r) about a center (M).
3. Ausbrechkralle nach Anspruch 2, dadurch gekennzeichnet, dass sich der Mittelpunkt (M) ausserhalb einer Verbindungslinie (V) zwischen den Spitzen3. breakout claw according to claim 2, characterized in that the center (M) outside a connecting line (V) between the tips
(6.1 , 6.2) befindet. (6.1, 6.2).
4. Ausbrechkralle nach einem der vorigen Ansprüche, dadurch gekennzeichnet, dass ein Ende (3) vorhanden ist, welches ein Widerlager (4) umfasst. 4. breakout claw according to one of the preceding claims, characterized in that an end (3) is present, which comprises an abutment (4).
5. Ausbrechkralle nach Anspruch 4, dadurch gekennzeichnet, dass ein Werkstoffstreifen (2) einends das Ende (3) und andernends ein Freiende (5) aufweist. 5. Ausbrechkralle according to claim 4, characterized in that a strip of material (2) at one end the end (3) and at the other end a free end (5).
6. Ausbrechkralle nach Anspruch 5, dadurch gekennzeichnet, dass das Freiende (5) die beiden Spitzen (6.1 , 6.2) und die Stösselaufnahme (7) umfasst. 6. Ausbrechkralle according to claim 5, characterized in that the free end (5) comprises the two tips (6.1, 6.2) and the plunger receptacle (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 true EP3571028A1 (en) 2019-11-27
EP3571028B1 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

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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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DE9214557U1 (en) * 1992-10-27 1992-12-17 Karl Marbach Gmbh & Co, 7100 Heilbronn, De
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Also Published As

Publication number Publication date
CN110198817A (en) 2019-09-03
ES2846179T3 (en) 2021-07-28
US20190337181A1 (en) 2019-11-07
EP3571028B1 (en) 2020-09-23
CN110198817B (en) 2021-12-03
DE102017100900A1 (en) 2018-07-19
WO2018134161A1 (en) 2018-07-26

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