EP3470147B1 - Hydraulic punching apparatus - Google Patents

Hydraulic punching apparatus Download PDF

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Publication number
EP3470147B1
EP3470147B1 EP18196871.0A EP18196871A EP3470147B1 EP 3470147 B1 EP3470147 B1 EP 3470147B1 EP 18196871 A EP18196871 A EP 18196871A EP 3470147 B1 EP3470147 B1 EP 3470147B1
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EP
European Patent Office
Prior art keywords
punch
die
carrier
punching
guide element
Prior art date
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Application number
EP18196871.0A
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German (de)
French (fr)
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EP3470147A1 (en
Inventor
Thorsten Weyland
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TKR Spezialwerkzeuge GmbH
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TKR Spezialwerkzeuge GmbH
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Publication of EP3470147A1 publication Critical patent/EP3470147A1/en
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Classifications

    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/243—Perforating, i.e. punching holes in profiles
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/04—Movable or exchangeable mountings for tools

Definitions

  • Punching devices of the type mentioned at the beginning are used to make holes in one or more metal sheets as part of a punching process, which then subsequently serve to accommodate suitable connecting elements, such as blind rivets, blind rivet screws and / or blind rivet nuts.
  • the sheets to be processed are arranged in the punching device between the punch and the punching die, so that a hole selected according to the punching punch can then be punched into the sheet metal, the punching punch being adjusted in the direction of the punching die for this purpose.
  • the invention is based on the object of providing a punching device which enables differently shaped holes to be produced in a reliable manner.
  • the hydraulic punching device of a punching punch that can be exchangeably arranged on the punching punch carrier has a punching cross section that differs from a circular cross section.
  • the cross-sectional shape of the punch, perpendicular to its longitudinal axis, which corresponds to the punch cross-section, is basically freely selectable, which means that differently configured holes can be reliably produced by punching, with the punch die assigned to the punch each having a die opening corresponding to the punch cross-section.
  • the hydraulic punching device has a punch guide unit with a guide element which at least partially rests on the outside of the punch in such a way that the punch is secured against rotation.
  • a punch guide unit is arranged on the hydraulic punching device, for example detachably attached.
  • the punch guide unit prevents the punch, for example. is rotated due to a rotation of the drive piston of the piston unit during the punching process.
  • the guide element supported by the punch guide unit on the punching device rests at least in sections on an outside of the punch running parallel to the adjustment direction of the punch, so that the punching punch is prevented from twisting due to the cross-sectional shape of the punch, which deviates from a circular shape.
  • An operator of the punching device can thus align the punch in a simple manner by aligning the punching device.
  • the punch guide unit arranged in the area between the punch carrier and the punch die also prevents a radial displacement of the punch during the punching process.
  • the design of the punch guide unit which is, for example, detachably arranged on the hydraulic punching device, can in principle, as well as the design of the guide element, be freely selected.
  • the guide element can be formed by a receiving opening on the punch guide unit that is adapted to the punch cross section. Due to the arrangement of the punch guide unit, however, in the area between the punch carrier and the punch die, the guide unit leads to a reduction in the stroke movement of the punch. According to an advantageous development of the invention it is therefore provided that the guide element is displaceable in the adjustment direction of the punch on a receiving unit of the Punch guide unit is stored.
  • the punch guide unit has a receiving unit on which the guide element guiding the punch is slidably mounted.
  • the displaceability of the guide element makes it possible to avoid a reduction in stroke due to the arrangement of the punch guide unit in the area between the punch carrier and the punch die.
  • the punch is guided by the guide element.
  • the punch moves the guide element in the direction of the punch die during the punching process.
  • the guide element is in turn guided on the receiving unit of the punch guide unit, so that the guide element simultaneously provides a reliable anti-twist protection of the punch over the entire stroke range.
  • this has the advantage that, in addition to being an anti-twist device, it also serves as a stripper, which ensures that the material of the workpiece is removed from the outer surface of the punch when it is shifted back of the punch is reliably removed from it.
  • the arrangement of the guide element on the receiving unit is basically freely selectable. According to a particularly advantageous embodiment of the invention, however, it is provided that the guide element is pretensioned, in particular spring-pretensioned, in the direction of the punch carrier.
  • a pretensioning of the guide element in the direction of the punch carrier in the case of its displaceable mounting on the receiving unit ensures that the guide element is reliably guided during the entire punching process.
  • the guide element After the punch has reached a position during the punching process in which the punch rests against the guide element with a stop surface, the guide element is displaced against the spring preload in the direction of the punch, the guide element continuing to guide the punch reliably. After the punch has been moved back, the guide element automatically moves into its position due to its spring preload Starting position.
  • any spring elements in particular tension springs, can be used to generate the prestress.
  • the design of the receiving unit and die carrier of the punch guide unit can in principle be freely selected. For example, they can be designed as separate elements which can be arranged individually on the hydraulic punching device. According to a particularly advantageous embodiment of the invention, however, it is provided that the receiving unit and the die carrier are designed as a one-piece base carrier. According to this embodiment of the invention, the receiving unit for receiving the guide element and the die carrier for receiving the die are formed in one piece. A corresponding embodiment enables a particularly simple arrangement of the punch guide unit on the hydraulic punching device, with only the base support of the punching punch guide unit having to be connected to the punching device, for example a punching bracket.
  • the die carrier can be supported on a bracket end opposite the punch carrier or screwed to it, so that the receiving unit is reliably arranged between the punch carrier and the punch die.
  • An alternative or supplementary securing of the position of the base support of the punch guide unit can be provided, for example, by further securing legs which can be fastened on the one hand to the base support and on the other hand to the punching bracket.
  • the receiving unit has a receiving opening for the exchangeable arrangement of the guide element and / or the die carrier a die receptacle for the exchangeable arrangement of a punching die.
  • this embodiment of the invention there is the possibility of using a standardized receiving unit and a standardized die carrier to use the guide unit with different punching punches. If a different punching cross-section is required, it is only necessary to replace the punch and the punching die and not the entire guide unit. Only the guide element and the punch die have to be exchanged, with the one to be used Punch adapted guide elements and punch dies are arranged in the receiving opening or die receptacle. This refinement of the invention enables particularly cost-effective operation, since a punch guide unit configured in accordance with this development can be used with a large number of punch punches.
  • the base support is designed for releasable connection with a punching bracket of the punching device.
  • a connection with the punching bracket can be implemented in a particularly simple and cost-effective manner.
  • the die carrier according to an advantageous development of the invention, is designed to rest on the punching bracket on its side opposite the die receptacle. This ensures a reliable power transmission from the die holder to the punching bracket during the punching process.
  • the receiving unit and the die carrier are designed as a one-piece base carrier
  • the base carrier has a contact section for arranging a workpiece in the area between the receiving unit and the die carrier having.
  • the contact section can be formed, for example, by a longitudinal groove which is open on one side and thus enables a reliable arrangement of a workpiece to be punched in the area between the die carrier and the receiving unit.
  • the contact section ensures good positioning, since it can also be used to support the workpiece to be punched.
  • the punching device 1 shown in a side view has a hydraulic unit 15 and a punching bracket 13 connected to the hydraulic unit 15.
  • a piston, not shown here, of the hydraulic unit 15 makes it possible to adjust a punch carrier 3 for punching in the longitudinal axis direction of a punch 2 arranged on the punch carrier 3 in the direction of a punching die 4.
  • the punch 2 is arranged with a connecting pin 21 in a punch receptacle 22 of the punch carrier 3. (see. Figure 1 to 3 )
  • the punch carrier 3 is designed to detachably receive the punch 2, this not having a circular cross section but a punch cross section through which an elongated hole can be produced.
  • the punch 2 is additionally guided on its circumference by a guide element 7 of a punch guide unit 6, the guide element 7 with a guide section 18 resting against an outer surface of the punch 2.
  • the guide element 7 thus prevents the punch 2 from rotating during the punching process and ensures constant alignment of the punch 2 with respect to the punch bracket 13.
  • the guide element 7 is in turn arranged displaceably in the direction of the longitudinal axis of the punch 2 on a receiving unit 8, the receiving unit 8 having a receiving opening 11 for this purpose, which is adapted to a guide element 20 of the guide element 7.
  • a shoulder of the punch 2 running in the area of the punch carrier 3 comes to rest on an end face of the guide element 7 facing the punch carrier 3 and then moves it within the receiving opening 11 in the direction of a die carrier 9, which is used to arrange a punch 2 adapted to the punch carrier 2 Punching die 4 with a die opening 5 corresponding to the punching cross section has a die receptacle 12.
  • the punch 2 extends with its punch cross-section through the die opening 5 of the punch 4.
  • the starting position shown also moves the guide element 7 into its starting position, which, viewed in the direction of the punch carrier 3, comes to rest in the starting position on a cover plate 19 screwed on in the area of the receiving unit 8. Because the guide element 7 is secured in position with respect to the punch 2, this also serves as a stripper during the return movement.
  • the receiving unit 8 and the die carrier 9 of the punch guide unit 6 are part of a one-piece base carrier 10 which has an elongated contact section 14 for arranging a workpiece in the area between the punch 4 and the punch 2.
  • the base carrier 10 is screwed in the area of the die carrier 9 to an end of the punching bracket 13 opposite the punch carrier 3.
  • the base support 10 of the punch guide unit 6 is additionally secured in position on the punching bracket 13 by two securing legs 17 resting on the outside of the punching bracket 13 and screwed to it. Together with a section of the receiving unit 8 and sections of the securing legs 17, this forms an opening for the guide element 7.
  • the guide element 7 is pretensioned in the direction of the punch carrier 3 by means of spring elements 23 which act on the cover plate 19 at one end and on the guide element 7 at the other end.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Description

Die Erfindung betrifft ein hydraulisches Stanzgerät, mit

  • einem hydraulisch angetriebenen Stanzstempelträger zur lösbaren Aufnahme eines Stanzstempels und
  • einer Stanzmatrize mit einer an den Stanzquerschnitt des Stanzstempels angepassten Matrizenöffnung.
The invention relates to a hydraulic punching device with
  • a hydraulically driven punch carrier for releasably receiving a punch and
  • a punching die with a die opening adapted to the punching cross section of the punching punch.

Stanzgeräte der eingangs genannten Art werden dazu genutzt, um im Rahmen eines Stanzvorgangs Löcher in eine oder mehrere Bleche einzubringen, welche dann anschließend zur Aufnahme von geeigneten Verbindungselementen, wie bspw. Blindnieten, Blindnietschrauben und/oder Blindnietmuttern dienen.Punching devices of the type mentioned at the beginning are used to make holes in one or more metal sheets as part of a punching process, which then subsequently serve to accommodate suitable connecting elements, such as blind rivets, blind rivet screws and / or blind rivet nuts.

Zur Herstellung von Löchern werden die zu bearbeitenden Bleche in dem Stanzgerät zwischen dem Stanzstempel und der Stanzmatrize angeordnet, sodass anschließend ein entsprechend dem Stanzstempel gewähltes Loch in das Blech gestanzt werden kann, wobei hierzu der Stanzstempel in Richtung auf die Stanzmatrize verstellt wird.To produce holes, the sheets to be processed are arranged in the punching device between the punch and the punching die, so that a hole selected according to the punching punch can then be punched into the sheet metal, the punching punch being adjusted in the direction of the punching die for this purpose.

Derzeit bekannte hydraulische Stanzgeräte sind lediglich zur Aufnahme von Stanzstempeln mit einem kreisförmigen Querschnitt ausgebildet, mit denen sich somit ausschließlich kreisförmige Löcher herstellen lassen, wobei sich deren Durchmesser nach dem Durchmesser des stanzenden Abschnitts des Stanzstempels bestimmt. Zur Herstellung unterschiedlicher Löcher sind die Stanzstempel dabei lösbar an einem Stanzstempelträger einer Kolbeneinheit einer Hydraulikeinheit angeordnet, wobei die Kolbeneinheit in ihrer Längsachsenrichtung durch einen Antrieb der Hydraulikeinheit verfahrbar ist und dabei den Stanzstempel durch die zu bearbeitenden Bleche hindurchtreibt. Derartige Stanzgeräte sind aus der WO 2017/021363 A2 bekannt.Currently known hydraulic punching devices are only designed to receive punching punches with a circular cross section, with which exclusively circular holes can be produced, the diameter of which is determined by the diameter of the punching section of the punching punch. To produce different holes, the punches are detachably arranged on a punch support of a piston unit of a hydraulic unit, the piston unit being movable in its longitudinal axis direction by a drive of the hydraulic unit and thereby driving the punch through the sheet metal to be processed. Such punching devices are from WO 2017/021363 A2 known.

Zur Herstellung von Löchern mit einem von einer Kreisform abweichenden Querschnitt, bspw. zur Herstellung von sechskantförmigen Aufnahmeöffnungen zur Aufnahme geeigneter Muttern, werden derzeit in umständlichen Verfahren entsprechende Ausnehmungen aus dem Blech herausgeschnitten. Die bekannten Herstellungsverfahren weisen dabei überdies den Nachteil auf, dass die Löcher nur eine unzureichende Form aufweisen.For the production of holes with a cross section deviating from a circular shape, for example for the production of hexagonal receiving openings suitable for receiving Nuts, corresponding recesses are currently cut out of the sheet metal in a complicated process. The known manufacturing processes also have the disadvantage that the holes are of insufficient shape.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, ein Stanzgerät bereitzustellen, welches in zuverlässiger Weise die Herstellung unterschiedlich geformter Löcher ermöglicht.Proceeding from this, the invention is based on the object of providing a punching device which enables differently shaped holes to be produced in a reliable manner.

Die Erfindung löst die Aufgabe durch ein hydraulisches Stanzgerät mit den Merkmalen des Anspruchs 1. Vorteilhafte Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.The invention solves the problem by means of a hydraulic punching device with the features of claim 1. Advantageous developments of the invention are specified in the dependent claims.

Erfindungsgemäß, weist das hydraulische Stanzgerät einer auswechselbar an dem Stanzstempelträger anordbare Stanzstempel einen von einem kreisförmigen Querschnitt verschiedenen Stanzquerschnitt auf.According to the invention, the hydraulic punching device of a punching punch that can be exchangeably arranged on the punching punch carrier has a punching cross section that differs from a circular cross section.

Die Möglichkeit zur Anordnung von Stanzstempeln mit solchen Querschnitten, welche verschieden zu einem kreisförmigen Querschnitt sind, d. h. einen von einer Kreisform abweichenden Querschnitt, bspw. in Form eines Langlochs, aufweisen, ermöglicht eine zuverlässige und beliebig oft wiederholbare Herstellung von Löchern mit gleichbleibender Qualität. Sol kann bspw. unter Verwendung von Stanzstempeln mit einem sechseckigen Stanzquerschnitt in zuverlässiger Weise eine Ausnehmung für eine Mutter hergestellt werden, welche es dann ermöglicht, eine verdrehsichere Verbindung herzustellen. Die Querschnittsform der Stanzstempel, senkrecht zu dessen Längsachse, welche dem Stanzquerschnitt entspricht, ist dabei grundsätzlich frei wählbar, wodurch unterschiedlich ausgestaltete Löcher in zuverlässiger Weise durch Stanzen hergestellt werden können, wobei die dem Stanzstempel zugeordnete Stanzmatrize jeweils eine dem Stanzquerschnitt entsprechende Matrizenöffnung aufweist.The possibility of arranging punches with such cross-sections which are different from a circular cross-section, i.e. H. Having a cross-section deviating from a circular shape, for example in the form of an elongated hole, enables holes to be produced reliably and as often as required with constant quality. Sol can, for example, using punching punches with a hexagonal punching cross-section, reliably produce a recess for a nut, which then makes it possible to produce a connection that is secure against rotation. The cross-sectional shape of the punch, perpendicular to its longitudinal axis, which corresponds to the punch cross-section, is basically freely selectable, which means that differently configured holes can be reliably produced by punching, with the punch die assigned to the punch each having a die opening corresponding to the punch cross-section.

Um eine zuverlässige Ausrichtung der mit den verschiedenen Stanzstempeln herstellbaren Löchern zu gewährleisten, ist es, anders als bei kreisrunden Stanzquerschnitten, erforderlich, den Stanzstempel in Umfangsrichtung gegenüber dem zu stanzenden Werkstück, bspw. Blech auszurichten, um eine ordnungsgemäße Orientierung der herzustellenden Öffnung, bspw. eines Langlochs, zu gewährleisten.In order to ensure a reliable alignment of the holes that can be made with the various punching punches, it is necessary, unlike with circular punching cross-sections, to align the punching punch in the circumferential direction with respect to the workpiece to be punched, for example sheet metal, in order to ensure the correct orientation of the opening to be made, for example. An elongated hole to ensure.

Um einer die Orientierung des Stanzstempels verändernden Verdrehung des Stanzstempels während des Stanzvorgangs vorzubeugen, ist nach der Erfindung vorgesehen, dass das hydraulische Stanzgerät eine Stanzstempelführungseinheit mit einem Führungselement aufweist, das zumindest abschnittsweise derart außenseitig an dem Stanzstempel anliegt, dass der Stanzstempel verdrehgesichert ist.In order to prevent a twisting of the punch during the punching process that changes the orientation of the punch, the invention provides that the hydraulic punching device has a punch guide unit with a guide element which at least partially rests on the outside of the punch in such a way that the punch is secured against rotation.

Gemäß der Erfindung ist an dem hydraulischen Stanzgerät eine Stanzstempelführungseinheit angeordnet, bspw. lösbar befestigt. Die Stanzstempelführungseinheit verhindert, dass der Stanzstempel bwsp. aufgrund einer Verdrehung des Antriebskolbens der Kolbeneinheit während des Stanzvorgangs verdreht wird. Das über die Stanzstempelführungseinheit an dem Stanzgerät abgestützte Führungselement liegt dabei zumindest abschnittsweise an einer parallel zu Verstellrichtung des Stanzstempels verlaufenden Außenseite des Stanzstempels an, sodass durch die von einer Kreisform abweichende Querschnittsform des Stanzstempels eine Verdrehung des Stanzstempels verhindert wird. Eine Ausrichtung des Stanzstempels kann somit durch einen Bediener des Stanzgeräts in einfacher Weise durch eine Ausrichtung des Stanzgeräts erfolgen. Nach erfolgter Ausrichtung wird eine Verstellung der Position des Stanzstempels in Umfangsrichtung aufgrund der Verdrehsicherung der Stanzstempelführungseinheit zuverlässig verhindert. Die im Bereich zwischen dem Stanzstempelträger und der Stanzmatrize angeordnete Stanzstempelführungseinheit verhindert überdies eine radiale Verlagerung des Stanzstempels während des Stanzvorgangs.According to the invention, a punch guide unit is arranged on the hydraulic punching device, for example detachably attached. The punch guide unit prevents the punch, for example. is rotated due to a rotation of the drive piston of the piston unit during the punching process. The guide element supported by the punch guide unit on the punching device rests at least in sections on an outside of the punch running parallel to the adjustment direction of the punch, so that the punching punch is prevented from twisting due to the cross-sectional shape of the punch, which deviates from a circular shape. An operator of the punching device can thus align the punch in a simple manner by aligning the punching device. After alignment has taken place, an adjustment of the position of the punch in the circumferential direction is reliably prevented due to the anti-twist protection of the punch guide unit. The punch guide unit arranged in the area between the punch carrier and the punch die also prevents a radial displacement of the punch during the punching process.

Die Ausgestaltung der Stanzstempelführungseinheit, welche bspw. lösbar an dem hydraulischen Stanzgerät angeordnet wird, ist grundsätzlich, ebenso wie die Ausgestaltung des Führungselements, frei wählbar. In seiner einfachsten Ausgestaltung kann das Führungselement durch eine an den Stanzquerschnitt angepasste Aufnahmeöffnung an der Stanzstempelführungseinheit gebildet sein. Aufgrund der Anordnung der Stanzstempelführungseinheit jedoch im Bereich zwischen dem Stanzstempelträger und der Stanzmatrize führt die Führungseinheit zu einer Reduzierung der Hubbewegung des Stanzstempels. Nach einer vorteilhaften Weiterbildung der Erfindung ist daher vorgesehen, dass das Führungselement in Verstellrichtung des Stanzstempels verschiebbar an einer Aufnahmeeinheit der Stanzstempelführungseinheit gelagert ist.The design of the punch guide unit, which is, for example, detachably arranged on the hydraulic punching device, can in principle, as well as the design of the guide element, be freely selected. In its simplest embodiment, the guide element can be formed by a receiving opening on the punch guide unit that is adapted to the punch cross section. Due to the arrangement of the punch guide unit, however, in the area between the punch carrier and the punch die, the guide unit leads to a reduction in the stroke movement of the punch. According to an advantageous development of the invention it is therefore provided that the guide element is displaceable in the adjustment direction of the punch on a receiving unit of the Punch guide unit is stored.

Gemäß dieser Ausgestaltung der Erfindung weist die Stanzstempelführungseinheit eine Aufnahmeeinheit auf, an der das den Stanzstempel führende Führungselement verschiebbar gelagert ist. Die Verschiebbarkeit des Führungselements ermöglicht es dabei, eine Hubreduzierung durch die Anordnung der Stanzstempelführungseinheit im Bereich zwischen dem Stanzstempelträger und der Stanzmatrize zu vermeiden. Der Stanzstempel wird dabei durch das Führungselement geführt. Darüber hinaus verlagert der Stanzstempel nach einem axialen Anschlag einer Anschlagfläche des Stanzstempels, die im Bereich des Stanzstempelträgers verläuft, während des Stanzprozesses das Führungselement in Richtung auf die Stanzmatrize. Das Führungselement wird dabei seinerseits an der Aufnahmeeinheit der Stempelführungseinheit geführt, sodass das Führungselement zugleich eine zuverlässige Verdrehsicherung des Stanzstempels über den gesamten Hubbereich bewirkt.According to this embodiment of the invention, the punch guide unit has a receiving unit on which the guide element guiding the punch is slidably mounted. The displaceability of the guide element makes it possible to avoid a reduction in stroke due to the arrangement of the punch guide unit in the area between the punch carrier and the punch die. The punch is guided by the guide element. In addition, after an axial stop of a stop surface of the punch that runs in the region of the punch carrier, the punch moves the guide element in the direction of the punch die during the punching process. The guide element is in turn guided on the receiving unit of the punch guide unit, so that the guide element simultaneously provides a reliable anti-twist protection of the punch over the entire stroke range.

Sowohl im Falle eines starren Führungselements als auch im Falle eines in Verstellrichtung des Stanzstempels verschiebbar angeordneten Führungselements weist dieses den Vorteil auf, dass dieses neben einer Verdrehsicherung zudem auch als Abstreifer dient, welcher gewährleistet, dass Material des Werkstücks von der Mantelfläche des Stanzstempels bei einer Rückverlagerung des Stanzstempels zuverlässig von diesem entfernt wird.Both in the case of a rigid guide element and in the case of a guide element arranged to be displaceable in the adjustment direction of the punch, this has the advantage that, in addition to being an anti-twist device, it also serves as a stripper, which ensures that the material of the workpiece is removed from the outer surface of the punch when it is shifted back of the punch is reliably removed from it.

Die Anordnung des Führungselements an der Aufnahmeeinheit ist grundsätzlich frei wählbar. Nach einer besonders vorteilhaften Ausgestaltung der Erfindung ist jedoch vorgesehen, dass das Führungselement in Richtung auf den Stanzstempelträger vorgespannt, insbesondere federvorgespannt ist.The arrangement of the guide element on the receiving unit is basically freely selectable. According to a particularly advantageous embodiment of the invention, however, it is provided that the guide element is pretensioned, in particular spring-pretensioned, in the direction of the punch carrier.

Eine Vorspannung des Führungselements in Richtung auf den Stanzstempelträger im Falle dessen verschiebbaren Lagerung an der Aufnahmeeinheit gewährleistet, dass das Führungselement während des gesamten Stanzvorgangs zuverlässig geführt wird. Nach Erreichen einer Position des Stanzstempels während des Stanzvorgangs, bei der der Stanzstempel mit einer Anschlagfläche an dem Führungselement anliegt, wird dieses entgegen der Federvorspannung in Richtung auf die Stanzmatrize verschoben, wobei das Führungselement den Stanzstempel weiterhin zuverlässig führt. Nach einer Rückverlagerung des Stanzstempels gelangt das Führungselement aufgrund seiner Federvorspannung selbsttätig in seine Ausgangsposition. Zur Erzeugung der Vorspannung können dabei grundsätzlich beliebige Federelemente, insbesondere Zugfedern verwendet werden.A pretensioning of the guide element in the direction of the punch carrier in the case of its displaceable mounting on the receiving unit ensures that the guide element is reliably guided during the entire punching process. After the punch has reached a position during the punching process in which the punch rests against the guide element with a stop surface, the guide element is displaced against the spring preload in the direction of the punch, the guide element continuing to guide the punch reliably. After the punch has been moved back, the guide element automatically moves into its position due to its spring preload Starting position. In principle, any spring elements, in particular tension springs, can be used to generate the prestress.

Die Ausgestaltung von Aufnahmeeinheit und Matrizenträger der Stanzstempelführungseinheit ist grundsätzlich frei wählbar. So können diese bspw. als separate Elemente ausgeführt sein, welche an dem hydraulischen Stanzgerät einzeln angeordnet werden können. Nach einer besonders vorteilhaften Ausgestaltung der Erfindung ist jedoch vorgesehen, dass die Aufnahmeeinheit und der Matrizenträger als einstückiger Grundträger ausgebildet sind. Gemäß dieser Ausgestaltung der Erfindung sind die Aufnahmeeinheit zur Aufnahme des Führungselements und der Matrizenträger zur Aufnahme der Matrize einstückig ausgebildet. Eine entsprechende Ausgestaltung ermöglicht eine besonders einfache Anordnung der Stanzstempelführungseinheit an dem hydraulischen Stanzgerät, wobei hierzu nur der Grundträger der Stanzstempelführungseinheit mit dem Stanzgerät, bspw. einem Stanzbügel verbunden werden muss.The design of the receiving unit and die carrier of the punch guide unit can in principle be freely selected. For example, they can be designed as separate elements which can be arranged individually on the hydraulic punching device. According to a particularly advantageous embodiment of the invention, however, it is provided that the receiving unit and the die carrier are designed as a one-piece base carrier. According to this embodiment of the invention, the receiving unit for receiving the guide element and the die carrier for receiving the die are formed in one piece. A corresponding embodiment enables a particularly simple arrangement of the punch guide unit on the hydraulic punching device, with only the base support of the punching punch guide unit having to be connected to the punching device, for example a punching bracket.

Hierzu kann bspw. der Matrizenträger an einem dem Stanzstempelträger gegenüberliegenden Bügelende abgestützt oder mit diesem verschraubt werden, sodass die Aufnahmeeinheit zuverlässig zwischen dem Stanzstempelträger und der Stanzmatrize angeordnet ist. Eine alternative oder ergänzende Lagesicherung des Grundträgers der Stanzstempelführungseinheit kann bspw. durch weitere Sicherungsschenkel erfolgen, welche einerseits an dem Grundträger und andererseits an dem Stanzbügel befestigbar sind.For this purpose, for example, the die carrier can be supported on a bracket end opposite the punch carrier or screwed to it, so that the receiving unit is reliably arranged between the punch carrier and the punch die. An alternative or supplementary securing of the position of the base support of the punch guide unit can be provided, for example, by further securing legs which can be fastened on the one hand to the base support and on the other hand to the punching bracket.

Nach einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass die Aufnahmeeinheit eine Aufnahmeöffnung zur auswechselbaren Anordnung des Führungselements und/oder der Matrizenträger eine Matrizenaufnahme zur auswechselbaren Anordnung einer Stanzmatrize aufweist.According to a further embodiment of the invention, it is provided that the receiving unit has a receiving opening for the exchangeable arrangement of the guide element and / or the die carrier a die receptacle for the exchangeable arrangement of a punching die.

Gemäß dieser Ausgestaltung der Erfindung besteht die Möglichkeit, unter Verwendung einer standardisierten Aufnahmeeinheit und eines standardisierten Matrizenträger die Führungseinheit mit unterschiedlichen Stanzstempeln zu verwenden. Im Falle des Bedarfs eines anderen Stanzquerschnitts ist lediglich eine Auswechslung des Stanzstempels und der Stanzmatrize und nicht der gesamten Führungseinheit erforderlich. Es muss lediglich das Führungselement und die Stanzmatrize ausgetauscht werden, wobei an den zu verwendeten Stanzstempel angepasste Führungselemente und Stanzmatrizen in der Aufnahmeöffnung bzw. Matrizenaufnahme angeordnet werden. Diese Ausgestaltung der Erfindung ermöglicht einen besonders kostengünstigen Betrieb, nachdem eine entsprechend dieser Weiterbildung ausgestaltete Stanzstempelführungseinheit mit einer Vielzahl von Stanzstempeln verwendet werden kann.According to this embodiment of the invention, there is the possibility of using a standardized receiving unit and a standardized die carrier to use the guide unit with different punching punches. If a different punching cross-section is required, it is only necessary to replace the punch and the punching die and not the entire guide unit. Only the guide element and the punch die have to be exchanged, with the one to be used Punch adapted guide elements and punch dies are arranged in the receiving opening or die receptacle. This refinement of the invention enables particularly cost-effective operation, since a punch guide unit configured in accordance with this development can be used with a large number of punch punches.

Eine Montage der Stanzstempelführungseinheit, ein ggf. erforderlicher Austausch der Stanzstempelführungseinheit und/oder Demontage für den Fall, dass die Hydraulikeinheit mit Stanzstempeln mit kreisförmigem Stanzquerschnitt betrieben werden soll, ist aufgrund der lösbaren Anordnung der Stanzstempelführungseinheit an dem Stanzgerät in einfacher Weise durchführbar, wobei nach einer besonders vorteilhaften Ausgestaltung der Erfindung der Grundträger zur lösbaren Verbindung mit einem Stanzbügel des Stanzgeräts ausgebildet ist. Eine Verbindung mit dem Stanzbügel lässt sich in besonders einfacher Weise kostengünstig realisieren.An assembly of the punch guide unit, a possibly necessary exchange of the punch guide unit and / or dismantling in the event that the hydraulic unit is to be operated with punches with a circular punch cross-section can be carried out in a simple manner due to the detachable arrangement of the punch guide unit on the punching device In a particularly advantageous embodiment of the invention, the base support is designed for releasable connection with a punching bracket of the punching device. A connection with the punching bracket can be implemented in a particularly simple and cost-effective manner.

Eine besonders zuverlässige Abstützung während des Stanzvorgangs wird insbesondere dadurch erreicht, dass der Matrizenträger nach einer vorteilhaften Weiterbildung der Erfindung an seiner der Matrizenaufnahme gegenüberliegenden Seite zur Anlage an dem Stanzbügel ausgebildet ist. Hierdurch wird eine zuverlässige Kraftübertragung von der Matrizenaufnahme auf den Stanzbügel währen des Stanzprozesses gewährleistet.Particularly reliable support during the punching process is achieved in particular in that the die carrier, according to an advantageous development of the invention, is designed to rest on the punching bracket on its side opposite the die receptacle. This ensures a reliable power transmission from the die holder to the punching bracket during the punching process.

Im Falle der gemäß einer vorteilhaften Weiterbildung vorgesehenen Ausgestaltung, wonach die Aufnahmeeinheit und der Matrizenträger als einstückiger Grundträger ausgebildet sind, ist nach einer besonders vorteilhaften Ausgestaltung der Erfindung ferner vorgesehen, dass der Grundträger im Bereich zwischen der Aufnahmeeinheit und dem Matrizenträger ein Anlageabschnitt zur Anordnung eines Werkstücks aufweist.In the case of the embodiment provided according to an advantageous development, according to which the receiving unit and the die carrier are designed as a one-piece base carrier, according to a particularly advantageous embodiment of the invention it is further provided that the base carrier has a contact section for arranging a workpiece in the area between the receiving unit and the die carrier having.

Gemäß dieser Ausgestaltung der Erfindung kann der Anlageabschnitt bspw. durch eine Längsnut gebildet sein, welche einseitig offen ist und somit eine zuverlässige Anordnung eines zu stanzenden Werkstücks im Bereich zwischen dem Matrizenträger und der Aufnahmeeinheit ermöglicht. Der Anlageabschnitt gewährleistet dabei eine gute Positionierung, nachdem dieser darüber hinaus zur Abstützung des zu stanzenden Werkstücks genutzt werden kann.According to this embodiment of the invention, the contact section can be formed, for example, by a longitudinal groove which is open on one side and thus enables a reliable arrangement of a workpiece to be punched in the area between the die carrier and the receiving unit. The contact section ensures good positioning, since it can also be used to support the workpiece to be punched.

Ein Ausführungsbeispiel der Erfindung wird nachstehend mit Bezug auf die Zeichnungen erläutert. In den Zeichnungen zeigen:

Figur 1
eine Seitenansicht einer Ausführungsform eines hydraulischen Stanzgeräts mit einer Hydraulikeinheit und einem Stanzbügel;
Figur 2
eine perspektivische Ansicht auf den Stanzbügelbereich des Stanzgeräts von Figur. 1;
Figur 3
eine Explosionsdarstellung einer Stanzstempelführungseinheit von Figur 1;
Figur 4
eine Seitenansicht des Bügelbereichs des Stanzgeräts von Figur 1, teilweise im Schnitt in einer Ausgangsstellung des Stanzstempels und
Figur 5
eine Seitenansicht des Bügelbereichs des Stanzgeräts von Figur 1, teilweise im Schnitt in einer ausgefahrenen Stellung des Stanzstempels.
An embodiment of the invention is explained below with reference to the drawings. In the drawings show:
Figure 1
a side view of an embodiment of a hydraulic punching device with a hydraulic unit and a punching bracket;
Figure 2
a perspective view of the punch bracket area of the punching device of FIG Figure. 1 ;
Figure 3
an exploded view of a punch guide unit of FIG Figure 1 ;
Figure 4
FIG. 3 is a side view of the temple portion of the punch of FIG Figure 1 , partly in section in an initial position of the punch and
Figure 5
FIG. 3 is a side view of the temple portion of the punch of FIG Figure 1 , partly in section in an extended position of the punch.

Das in Figur 1 in einer Seitenansicht dargestellte Stanzgerät 1 weist eine Hydraulikeinheit 15 sowie einen mit der Hydraulikeinheit 15 verbundenen Stanzbügel 13 auf. Ein hier nicht dargestellter Kolben der Hydraulikeinheit 15 ermöglicht es, einen Stanzstempelträger 3 zum Stanzen in Längsachsenrichtung eines an dem Stanzstempelträgers 3 angeordneten Stanzstempel 2 in Richtung auf eine Stanzmatrize 4 zu verstellen. Mittels des Stanzgeräts 1 ist es somit möglich, im Bereich zwischen dem Stanzstempel 2 und der Stanzmatrize 4 anordbare Werkstücke, bspw. Bleche, mit Löchern zu versehen. Der Stanzstempel 2 ist dabei mit einem Anschlusszapfen 21 in einer Stanzstempelaufnahme 22 des Stanzstempelträgers 3 angeordnet. (vgl. Figur 1 bis 3)This in Figure 1 The punching device 1 shown in a side view has a hydraulic unit 15 and a punching bracket 13 connected to the hydraulic unit 15. A piston, not shown here, of the hydraulic unit 15 makes it possible to adjust a punch carrier 3 for punching in the longitudinal axis direction of a punch 2 arranged on the punch carrier 3 in the direction of a punching die 4. By means of the punching device 1, it is thus possible to provide workpieces, for example sheets, with holes in the area between the punch 2 and the punching die 4. The punch 2 is arranged with a connecting pin 21 in a punch receptacle 22 of the punch carrier 3. (see. Figure 1 to 3 )

Der Stanzstempelträger 3 ist zur lösbaren Aufnahme des Stanzstempels 2 ausgebildet, wobei dieser keinen kreisförmigen Querschnitt, sondern einen Stanzquerschnitt aufweist, durch welchen ein Langloch herstellbar ist. Der Stanzstempel 2 wird dabei zusätzlich an seinem Umfang durch ein Führungselement 7 einer Stanzstempelführungseinheit 6 geführt, wobei das Führungselement 7 mit einem Führungsabschnitt 18 an einer Außenfläche des Stanzstempels 2 anliegt. Das Führungselement 7 verhindert somit ein Verdrehen des Stanzstempels 2 während des Stanzvorgangs und gewährleistet eine gleichbleibende Ausrichtung des Stanzstempels 2 gegenüber dem Stanzbügel 13.The punch carrier 3 is designed to detachably receive the punch 2, this not having a circular cross section but a punch cross section through which an elongated hole can be produced. The punch 2 is additionally guided on its circumference by a guide element 7 of a punch guide unit 6, the guide element 7 with a guide section 18 resting against an outer surface of the punch 2. The guide element 7 thus prevents the punch 2 from rotating during the punching process and ensures constant alignment of the punch 2 with respect to the punch bracket 13.

Das Führungselement 7 ist seinerseits in Längsachsenrichtung des Stanzstempels 2 verschiebbar an einer Aufnahmeeinheit 8 angeordnet, wobei die Aufnahmeeinheit 8 hierzu eine Aufnahmeöffnung 11 aufweist, welche an ein Führungselement 20 des Führungselements 7 angepasst ist. Im Falle einer Längsverschiebung des Stanzstempels 2 während eines Stanzvorgangs ausgehend von der in Figur 4 dargestellten Ausgangsposition bis in die in Figur 5 dargestellte Endposition gelangt ein im Bereich des Stanzstempelträgers 3 verlaufender Absatz des Stanzstempels 2 an einer dem Stanzstempelträger 3 zugewandten Stirnfläche des Führungselements 7 zur Anlage und verschiebt dieses dann innerhalb der Aufnahmeöffnung 11 in Richtung auf einen Matrizenträger 9, welcher zur Anordnung einer an den Stanzstempel 2 angepassten Stanzmatrize 4 mit einer dem Stanzquerschnitt entsprechenden Matrizenöffnung 5 eine Matrizenaufnahme 12 aufweist.The guide element 7 is in turn arranged displaceably in the direction of the longitudinal axis of the punch 2 on a receiving unit 8, the receiving unit 8 having a receiving opening 11 for this purpose, which is adapted to a guide element 20 of the guide element 7. In the case of a longitudinal displacement of the punch 2 during a punching process starting from the in Figure 4 starting position shown up to the in Figure 5 A shoulder of the punch 2 running in the area of the punch carrier 3 comes to rest on an end face of the guide element 7 facing the punch carrier 3 and then moves it within the receiving opening 11 in the direction of a die carrier 9, which is used to arrange a punch 2 adapted to the punch carrier 2 Punching die 4 with a die opening 5 corresponding to the punching cross section has a die receptacle 12.

In der in Figur 5 dargestellten Endposition erstreckt sich der Stanzstempel 2 mit seinem Stanzquerschnitt durch die Matrizenöffnung 5 der Stanzmatrize 4. Bei einer Rückverlagerung des Stanzstempels 2 in Richtung auf die in Figur 4 dargestellte Ausgangsposition gelangt auch das Führungselement 7 in seine Ausgangsposition, wobei dieses in Richtung auf den Stanzstempelträger 3 betrachtet in der Ausgangsposition an einer im Bereich der Aufnahmeeinheit 8 angeschraubten Deckplatte 19 zur Anlage kommt. Aufgrund der Lagesicherung des Führungselements 7 gegenüber dem Stanzstempel 2 dient dieses bei der Rückbewegung zusätzlich als Abstreifer.In the in Figure 5 The punch 2 extends with its punch cross-section through the die opening 5 of the punch 4. When the punch 2 is displaced back in the direction of the in Figure 4 The starting position shown also moves the guide element 7 into its starting position, which, viewed in the direction of the punch carrier 3, comes to rest in the starting position on a cover plate 19 screwed on in the area of the receiving unit 8. Because the guide element 7 is secured in position with respect to the punch 2, this also serves as a stripper during the return movement.

Die Aufnahmeeinheit 8 und der Matrizenträger 9 der Stanzstempelführungseinheit 6 sind Bestandteil eines einstückigen Grundträgers 10, welcher zur Anordnung eines Werkstücks im Bereich zwischen der Stanzmatrize 4 und dem Stanzstempel 2 einen langgestreckten Anlageabschnitt 14 aufweist. Der Grundträger 10 ist im Bereich des Matrizenträgers 9 mit einem dem Stanzstempelträger 3 gegenüberliegenden Ende des Stanzbügels 13 verschraubt. Eine zusätzliche Lagesicherung des Grundträgers 10 der Stanzstempelführungseinheit 6 an dem Stanzbügel 13 erfolgt durch zwei außenseitig an dem Stanzbügel 13 anliegende und mit diesem verschraubte Sicherungsschenkel 17. An ihrem dem Stanzbügel gegenüberliegenden Ende sind die Sicherungsbügel 17 zudem mit einem Rückhaltesteg 16 verschraubt. Dieser bildet gemeinsam mit einem Abschnitt der Aufnahmeeinheit 8 und Abschnitten der Sicherungsschenkel 17 eine Öffnung für das Führungselement 7.The receiving unit 8 and the die carrier 9 of the punch guide unit 6 are part of a one-piece base carrier 10 which has an elongated contact section 14 for arranging a workpiece in the area between the punch 4 and the punch 2. The base carrier 10 is screwed in the area of the die carrier 9 to an end of the punching bracket 13 opposite the punch carrier 3. The base support 10 of the punch guide unit 6 is additionally secured in position on the punching bracket 13 by two securing legs 17 resting on the outside of the punching bracket 13 and screwed to it. Together with a section of the receiving unit 8 and sections of the securing legs 17, this forms an opening for the guide element 7.

Das Führungselement 7 ist dabei über Federelemente 23, welche einenends an der Deckplatte 19 und anderenends an dem Führungselement 7 angreifen, in Richtung auf den Stanzstempelträger 3 vorgespannt.The guide element 7 is pretensioned in the direction of the punch carrier 3 by means of spring elements 23 which act on the cover plate 19 at one end and on the guide element 7 at the other end.

BezugszeichenlisteList of reference symbols

11
StanzgerätPunching device
22
StanzstempelPunch
33
StanzstempelträgerPunch carrier
44th
StanzmatrizePunching die
55
MatrizenöffnungDie opening
66th
StanzstempelführungseinheitPunch guide unit
77th
FührungselementGuide element
88th
AufnahmeeinheitRecording unit
99
MatrizenträgerDie carrier
1010
GrundträgerBasic carrier
1111
AufnahmeöffnungReceiving opening
1212
MatrizenaufnahmeDie holder
1313
StanzbügelPunching bracket
1414th
AnlageabschnittPlant section
1515th
HydraulikeinheitHydraulic unit
1616
RückhaltestegRetaining bar
1717th
SicherungsschenkelSafety leg
1818th
FührungsabschnittGuide section
1919th
DeckplatteCover plate
2020th
FührungselementGuide element
2121st
AnschlusszapfenConnecting pin
2222nd
StanzstempelaufnahmePunch holder
2323
FederelementSpring element

Claims (8)

  1. A hydraulic punching apparatus comprising
    - a hydraulically driven punch carrier for releasably receiving a punch and
    - a punch die having a die opening that is adapted to the punching cross-section of the punch,
    the punch (2) comprising a punching cross-section that is different from a circular cross-section, characterized in that a punch guide unit (6) having a guide element (7) is arranged on the punching apparatus (1) in the region between the punch carrier (3) and the punch die (4) and the guide element (7) is supported on the punching apparatus (1) via the punch guide unit (6) and abuts the outside of the punch (2) at least in portions such that the punch (2) is secured against rotation.
  2. The hydraulic punching apparatus according to claim 1, characterized in that the guide element (7) is mounted on a receiving unit (8) of the punch guide unit (6) so as to be shiftable in the movement direction of the punch (2).
  3. The hydraulic punching apparatus according to one or more of the preceding claims, characterized in that the guide element (7) is preloaded, in particular spring-preloaded, in the direction of the punch carrier (3).
  4. The hydraulic punching apparatus according to claim 2, characterized in that the receiving unit (8) and a die carrier (9) are formed as an integral main carrier (10).
  5. The hydraulic punching apparatus according to claim 4, characterized in that the receiving unit (8) comprises a receiving opening (11) for the removable arrangement of the guide element (7) and/or the die carrier (9) comprises a die receiving portion (12) for the removable arrangement of a punch die (4).
  6. The hydraulic punching apparatus according to claim 4, characterized in that the main carrier (10) is designed for releasable connection to a punch frame (13).
  7. The hydraulic punching apparatus according to claim 4, characterized in that the die carrier (9), on the side thereof that is opposite the die receiving portion (12), is designed to abut the punch frame (13).
  8. The hydraulic punching apparatus according to claim 4, characterized in that the main carrier (10) comprises an abutment portion (14) in the region between the receiving unit (8) and the die carrier (9) for the arrangement of a tool.
EP18196871.0A 2017-10-12 2018-09-26 Hydraulic punching apparatus Active EP3470147B1 (en)

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Application Number Priority Date Filing Date Title
DE102017123723.2A DE102017123723B4 (en) 2017-10-12 2017-10-12 Hydraulic punching device

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EP3470147A1 EP3470147A1 (en) 2019-04-17
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CN113305193B (en) * 2021-06-10 2023-05-05 江西时代包装供应链管理有限公司 Stamping equipment for processing metal packaging container

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US20190111464A1 (en) 2019-04-18
US10773293B2 (en) 2020-09-15
DE102017123723A1 (en) 2019-04-18
DE102017123723B4 (en) 2023-03-16
EP3470147A1 (en) 2019-04-17

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