EP2804710B1 - Device for removing the cores from cast bodies - Google Patents

Device for removing the cores from cast bodies Download PDF

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Publication number
EP2804710B1
EP2804710B1 EP13708064.4A EP13708064A EP2804710B1 EP 2804710 B1 EP2804710 B1 EP 2804710B1 EP 13708064 A EP13708064 A EP 13708064A EP 2804710 B1 EP2804710 B1 EP 2804710B1
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EP
European Patent Office
Prior art keywords
clamping
hammer
frame
spring bow
clamping device
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EP13708064.4A
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German (de)
French (fr)
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EP2804710A2 (en
Inventor
Alois Boindecker
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Fill GmbH
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Fill GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • B22D29/005—Removing cores by vibrating or hammering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C19/00—Components or accessories for moulding machines
    • B22C19/06—Devices for rapping or loosening the pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/02—Vibratory apparatus specially designed for shaking out flasks

Definitions

  • the invention relates to a device for coring cast bodies with sand cores, as defined in claim 1, wherein the device comprises a clamping device for clamping a workpiece to be machined and at least one oscillating drive which vibrates the clamping device.
  • a device of the above type is for example from the DE 29921056 U1 known.
  • Other devices for removing cores from castings are also made DE-C 396 729 .
  • a disadvantage of the known devices is especially that the oscillating movement of the clamping device is decoupled from the knocking process by means of the pneumatic hammer and must be stopped for the knocking of the workpiece, the oscillating process. This leads to significant delays in the gutting of castings and complicates the Entkernungsvorgang essential.
  • a hammer for a device for coring of the type mentioned in the present invention that the shank of the hammer is formed by a spring clip and the hammer head is arranged on a free end portion of the spring clip.
  • the spring clip is made of metal as a bending spring.
  • the spring clip may have at least one opening for receiving a fastening means on a hammer head opposite free end portion.
  • a particularly favorable for the assembly form, with which also a favorable vibration behavior of the hammer can be achieved, provides that the spring clip is S-shaped.
  • a variant of the invention with which the maintenance can be further simplified provides that the hammer head is releasably connected by means of a screw and / or plug connection with the spring clip.
  • a replacement of the hammer head can be performed in a simple manner without having to replace the spring clip itself.
  • the above object can also be achieved with a device of the type mentioned in the present invention that at least one hammer is resiliently arranged on the clamping device.
  • a resilient hammer into the tensioning device makes it possible to easily achieve a coupling of the hammer's knocking motion to the swinging movement of the tensioning device. The two movements can thus be synchronized, so that the device does not have to be stopped to carry out the knocking process.
  • a particularly advantageous variant of the invention provides that the clamping device has a clamping frame and a clamping plate with at least one receptacle for the workpiece to be machined, wherein the at least one hammer is arranged on the clamping frame of the clamping device.
  • the platen of this projecting centering mandrels for the workpiece has.
  • a good vibration behavior of the tensioning device can be achieved by connecting the tensioning device to a frame of the device with a frame of leaf springs at least partially surrounding it.
  • a hammer 1 for the claimed apparatus for coring cast bodies has a shank 2 and a hammer head 3.
  • the shaft 2 of the hammer 1 is formed by a spring clip.
  • the hammer head 3 is arranged on a free end portion 4 of the spring clip.
  • the spring clip can be designed, for example, as a bent metal band, ie in the form of a spiral spring.
  • the spring clip may be bent, for example, S-shaped.
  • the spring clip openings for receiving bolts 6, which may be formed, for example, as a cylinder head bolts with a hexagon, have.
  • the bolts 6 may have a thread on their outer sides and by means of corresponding nuts 7, which have a corresponding to the external thread pin 6 internal thread, are fixed.
  • the end section 5 is fixed between a fastening plate 9 arranged on a profile 8 of a tensioning device and a fixing plate 10 and fastened to the profile 8 by means of the bolts 6 and the nuts 7.
  • the mounting plate 9 may have a groove-shaped recess for receiving the free end 5.
  • the mounting plate 9 may be integrally formed with the profile 8 or connected thereto, for example by screwing, welding or other joining techniques.
  • the mounting plate 9 can be supported by means of support ribs 24 on the profile 8.
  • the hammer head 3 can also be fastened by means of bolts 11 to the free end 4 of the spring clip, wherein the bolts 11 can be screwed into the hammer head 3.
  • Bolt 11 and hammer head 3 in this case again have mutually corresponding threads.
  • a fixing plate 12 is pressed against the free end 4 and this fixed between the fixing plate 12 and a groove-shaped recess in the hammer head 11.
  • the hammer head 3 not only bolted to the shaft 2 but also integrally formed with the shaft 2 or may be connected thereto, for example, by welding, gluing or other joining techniques. The same applies with respect to the mounting plate 9 and the free end 5 of the spring clip.
  • Fig. 3 shows the tensioning device 13 in more detail.
  • the tensioning device 13 comprises a mounting frame 14, a first clamping plate 15 fixedly connected to the mounting frame 14, a first clamping plate 16, a plurality between the first clamping plate 16 and a second, in Fig. 4 arranged with the reference numeral 17 tension plate guide rods 18.
  • the second clamping plate 17 may be guided on the guide posts 18 and slidable along the same.
  • Fig. 4 can be arranged between the second clamping plate 17 and a support wall bellows cylinder 19 may be arranged. If a liquid or gaseous medium is introduced into the bellows cylinder 19, this causes a movement of the second clamping plate 17 towards the first clamping plate 16 or a pressing together thereof, so that in this way an object arranged between the clamping plates 16 and 17 is clamped in the clamping device 13 can be.
  • clamping plate 15 may have a receptacle for the object to be cored as well as a plurality of centering mandrels 23 protruding from the clamping plate 15.
  • the article to be cored may be, for example, a casting still surrounded by foundry sand, which can be freed from the molding sand by shaking the entire clamping device 13 by means of at least one oscillating drive.
  • the vibrations can be caused for example by a motor-driven and eccentrically mounted mass.
  • the oscillating drive itself or the coring device can or can, as in the above-mentioned DE29921056 U1 be executed.
  • the second clamping plate 17 is guided on the guide rods 18. But this is not absolutely necessary. It is also conceivable, for example, that the pull / guide rods 18 are omitted, or act only as tie rods.
  • the movable clamping plate 17 is then guided solely by the bellows cylinder 19, which is made possible by relatively stiff design of the bellows cylinder 19, for example in the form of vehicle tires.
  • the tensioning device 13 can be connected to a frame 21 of the device 22 according to the invention by means of a frame 20 which is partially surrounded by leaf springs.
  • the resonance frequency of each hammer 1 is preferably in a range between 10 and 25 Hz. Particularly preferred in a range between 15 and 25 Hz or 15 and 20 Hz. It has been found to be particularly advantageous if the resonance frequency of each hammer 1 is in one range of +/- 20% around 20 Hz.
  • the attachment of the hammers 1 has been found in the Aufspannrahmen 14 of the clamping device 13, as this can achieve an optimal knocking position for the hammers 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Entkernen von Gusskörpern mit Sandkernen, wie in Anspruch 1 definiert, wobei die Vorrichtung eine Spannvorrichtung zum Einspannen eines zu bearbeitenden Werkstückes und zumindest einen Schwingantrieb, welcher die Spannvorrichtung in Schwingung versetzt, aufweist.The invention relates to a device for coring cast bodies with sand cores, as defined in claim 1, wherein the device comprises a clamping device for clamping a workpiece to be machined and at least one oscillating drive which vibrates the clamping device.

Um Gusskörper mit Hohlräumen fertigen zu können, werden harzgebundene Sandkerne bzw. Sandkerne aus gebundenem oder ungebundenem Sand eingesetzt, der nach dem Abkühlen des Gusskörpers wieder aus den Hohlräumen entfernt werden muss Zu diesem Zweck werden die Sandkerne durch eine stoßartige Belastung der Gusskörper z B mit Hilfe eines Presslufthammers gebrochen und anschließend durch Schwingbewegungen des Gusskörpers an der Hohlraumwandung zerkleinert, bis der Sandkern als loser Sand aus dem Hohlraum rieselt, was durch eine Drehbewegung des Gusskörpers um seine eigene Achse unterstützt werden kann. Üblicherweise wird der Gusskörper durch eine Spannvorrichtung gehalten, die durch einen Schwingantrieb in Schwingungen versetzt werden kann.In order to be able to produce cast bodies with cavities, resin-bonded sand cores or sand cores of bound or unbonded sand are used, which must be removed again after cooling of the cast body from the cavities. For this purpose, the sand cores by an impact load of the cast body z B using a jackhammer broken and then crushed by swinging movements of the casting on the cavity wall until the sand core as loose sand trickles out of the cavity, which can be supported by a rotational movement of the casting around its own axis. Usually, the casting is held by a tensioning device which can be vibrated by a vibratory drive.

Eine Vorrichtung der oben genannten Art ist beispielsweise aus der DE 29921056 U1 bekannt geworden. Andere Vorrichtungen zum Entfernen von Kernen aus Gussstücken sind auch aus DE-C 396 729 , CN 2012 913 03Y oder FR-A 1 376 492 bekannt.A device of the above type is for example from the DE 29921056 U1 known. Other devices for removing cores from castings are also made DE-C 396 729 . CN 2012 913 03Y or FR-A 1 376 492 known.

Nachteilig an den bekannten Vorrichtungen ist vor allem, dass die Schwingbewegung der Spannvorrichtung von dem Klopfvorgang mittels des Presslufthammers entkoppelt ist und für das Klopfen des Werkstückes der Schwingvorgang gestoppt werden muss. Dies führt zu erheblichen Verzögerungen bei der Entkernung von Gusskörpern und verkompliziert den Entkernungsvorgang wesentlich.A disadvantage of the known devices is especially that the oscillating movement of the clamping device is decoupled from the knocking process by means of the pneumatic hammer and must be stopped for the knocking of the workpiece, the oscillating process. This leads to significant delays in the gutting of castings and complicates the Entkernungsvorgang essential.

Es ist daher eine Aufgabe der Erfindung den Entkernungsprozess in Hinblick auf die Entkernungsgeschwindigkeit zu verbessern und den Prozess insgesamt zu vereinfachen.It is therefore an object of the invention to improve the coring process in terms of coring speed and to simplify the process as a whole.

Diese Aufgabe wird mit einem Hammer für eine Vorrichtung zum Entkernen der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass der Schaft des Hammers von einem Federbügel gebildet wird und der Hammerkopf auf einem freien Endabschnitt des Federbügels angeordnet ist. Durch die Verwendung eines Hammers mit einem als Feder ausgebildeten Schaft ist es möglich, die Klopfbewegungen des Hammers mit den Schwingungsbewegungen der Spannvorrichtung auf einfache Weise zu koppeln, sodass die Klopfbewegung des Hammers in Resonanz mit der Schwingbewegung der Spannvorrichtung gebracht werden kann.This object is achieved with a hammer for a device for coring of the type mentioned in the present invention, that the shank of the hammer is formed by a spring clip and the hammer head is arranged on a free end portion of the spring clip. By using a hammer with a shaft formed as a spring, it is possible to easily couple the hammer knocking motions with the swinging movements of the tensioning device, so that the knocking motion of the hammer can be brought into resonance with the swinging movement of the tensioning device.

Sehr gute Eigenschaften hinsichtlich der Belastbarkeit und der Elastizität des Schaftes lassen sich dadurch erzielen, dass der Federbügel als Biegefeder aus Metall gefertigt ist.Very good properties in terms of resilience and elasticity of the shaft can be achieved that the spring clip is made of metal as a bending spring.

Um eine einfache Montage und ein einfaches Austauschen des gesamten Hammers im Bedarfsfall zu ermöglichen, kann der Federbügel an einem dem Hammerkopf gegenüberliegende freie Endabschnitt zumindest eine Öffnung zur Aufnahme eines Befestigungsmittels aufweisen.In order to allow easy installation and replacement of the entire hammer if necessary, the spring clip may have at least one opening for receiving a fastening means on a hammer head opposite free end portion.

Eine für die Montage besonders günstige Form, mit welcher sich auch ein günstiges Schwingverhalten des Hammers erzielen lässt, sieht vor, dass der Federbügel S-förmig ausgebildet ist.A particularly favorable for the assembly form, with which also a favorable vibration behavior of the hammer can be achieved, provides that the spring clip is S-shaped.

Eine Variante der Erfindung, mit welcher sich der Wartungsaufwand weiter vereinfachen lässt sieht vor, dass der Hammerkopf mittels einer Schraub- und/oder Steckverbindung mit dem Federbügel lösbar verbunden ist. Durch diese Ausführungsform kann auf einfache Weise ein Austauschen des Hammerkopfes durchgeführt werden, ohne den Federbügel selbst austauschen zu müssen.A variant of the invention, with which the maintenance can be further simplified provides that the hammer head is releasably connected by means of a screw and / or plug connection with the spring clip. By this embodiment, a replacement of the hammer head can be performed in a simple manner without having to replace the spring clip itself.

Die oben genannte Aufgabe lässt sich auch mit einer Vorrichtung der eingangs genannten Art erfindungsgemäß dadurch lösen, dass zumindest ein Hammer federnd an der Spannvorrichtung angeordnet ist. Durch die Integration eines federnden Hammers in die Spannvorrichtung lässt sich, wie bereits oben erwähnt, auf einfache Weise eine Kopplung der Klopfbewegung des Hammers an die Schwingbewegung der Spannvorrichtung erreichen. Die beiden Bewegungen können somit synchronisiert werden, sodass zur Durchführung des Klopfvorganges die Vorrichtung nicht mehr gestoppt werden muss.The above object can also be achieved with a device of the type mentioned in the present invention that at least one hammer is resiliently arranged on the clamping device. As already mentioned above, the integration of a resilient hammer into the tensioning device makes it possible to easily achieve a coupling of the hammer's knocking motion to the swinging movement of the tensioning device. The two movements can thus be synchronized, so that the device does not have to be stopped to carry out the knocking process.

Als besonders vorteilhaft hat es sich hierbei herausgestellt, wenn der der Hammer nach einem der Ansprüche 1 bis 8 ausgebildet ist.It has proven to be particularly advantageous in this case if the hammer according to one of claims 1 to 8 is formed.

Eine besonders vorteilhafte Variante der Erfindung, sieht vor, dass die Spannvorrichtung einen Aufspannrahmen und eine Aufspannplatte mit zumindest einer Aufnahme für das zu bearbeitende Werkstück aufweist, wobei der zumindest eine Hammer an dem Aufspannrahmen der Spannvorrichtung angeordnet ist.A particularly advantageous variant of the invention provides that the clamping device has a clamping frame and a clamping plate with at least one receptacle for the workpiece to be machined, wherein the at least one hammer is arranged on the clamping frame of the clamping device.

Um eine gute Fixierung des Werkstückes zu gewährleisten kann die Aufspannplatte von dieser wegragende Zentrierungsdorne für das Werkstück aufweist.In order to ensure a good fixation of the workpiece, the platen of this projecting centering mandrels for the workpiece has.

Ein gutes Schwingungsverhalten der Spannvorrichtung lässt sich dadurch erzielen, dass die Spannvorrichtung mit einem diese zumindest teilweise umgebenden Rahmen aus Blattfedern mit einem Grundgestell der Vorrichtung verbunden ist.A good vibration behavior of the tensioning device can be achieved by connecting the tensioning device to a frame of the device with a frame of leaf springs at least partially surrounding it.

Die Erfindung samt weiteren Vorteilen wird anhand der Zeichnungen näher erläutert, in welchen nicht einschränkende Ausführungsbeispiele dargestellt sind. In diesen zeigen schematisch:

Fig. 1
einen erfindungsgemäßen Hammer in einer Draufsicht;
Fig. 2
eine perspektivische Ansicht des Hammers aus Fig.l;
Fig. 3
eine Draufsicht auf eine Teilansicht einer erfindungsgemäßen Vorrichtung und
Fig. 4
eine perspektivische Ansicht einer erfindungsgemäßen Vorrichtung.
The invention together with further advantages will be explained in more detail with reference to the drawings, in which non-limiting embodiments are shown. In these show schematically:
Fig. 1
a hammer according to the invention in a plan view;
Fig. 2
a perspective view of the hammer of Fig.l;
Fig. 3
a plan view of a partial view of a device according to the invention and
Fig. 4
a perspective view of a device according to the invention.

Einführend sei festgehalten, dass in den unterschiedlich beschriebenen Ausführungsformen gleiche Teile mit gleichen Bezugszeichen bzw. gleichen Bauteilbezeichnungen versehen werden, wobei die in der gesamten Beschreibung enthaltenen Offenbarungen sinngemäß auf gleiche Teile mit gleichen Bezugszeichen bzw. gleichen Bauteilbezeichnungen übertragen werden können. Auch sind die in der Beschreibung gewählten Lageangaben, wie z.B. oben, unten, seitlich usw. auf die unmittelbar beschriebene sowie dargestellte Figur bezogen und sind bei einer Lageänderung sinngemäß auf die neue Lage zu übertragen. Weiters können auch Einzelmerkmale oder Merkmalskombinationen aus den gezeigten und beschriebenen unterschiedlichen Ausführungsbeispielen für sich eigenständige, erfinderische oder erfindungsgemäße Lösungen darstellen.By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the position information selected in the description, such as top, bottom, side, etc. are related to the immediately described and illustrated figure and are in the case of a change of position, to be transferred accordingly to the new situation. Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

Sämtliche Angaben zu Wertebereichen in gegenständlicher Beschreibung sind so zu verstehen, dass diese beliebige und alle Teilbereiche daraus mit umfassen, z.B. ist die Angabe 1 bis 10 so zu verstehen, dass sämtliche Teilbereiche, ausgehend von der unteren Grenze 1 und der oberen Grenze 10 mitumfasst sind, d.h. sämtliche Teilbereich beginnen mit einer unteren Grenze von 1 oder größer und enden bei einer oberen Grenze von 10 oder weniger, z.B. 1 bis 1,7, oder 3,2 bis 8,1 oder 5,5 bis 10.All statements on ranges of values in the description of the present invention should be understood to include any and all sub-ranges thereof, e.g. the indication 1 to 10 should be understood to include all sub-ranges, starting from the lower limit 1 and the upper limit 10, i. all subregions begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1 or 5.5 to 10.

Gemäß Fig. 1 und 2 weist ein Hammer 1 für die beanspruchte Vorrichtung zum Entkernen von Gusskörpern einen Schaft 2 und einen Hammerkopf 3 auf. Hierbei ist der Schaft 2 des Hammers 1 von einem Federbügel gebildet. Der Hammerkopf 3 ist auf einem freien Endabschnitt 4 des Federbügels angeordnet. Der Federbügel kann beispielweise als gebogenes Metallband, d.h. in Form einer Biegefeder, ausgebildet sein. Wie in Fig. 1 und 2 dargestellt kann der Federbügel beispielsweise S-förmig gebogen sein. An seinem zweiten freien Ende 5 kann der Federbügel Öffnungen zur Aufnahme von Bolzen 6, welche beispielsweise als Zylinderkopfschrauben mit einem Innensechskant ausgebildet sein können, aufweisen. Die Bolzen 6 können an ihren Außenseiten ein Gewinde aufweisen und mittels entsprechender Muttern 7, welche ein zu dem Außengewinde Bolzen 6 korrespondierendes Innengewinde aufweisen, fixiert werden. In der hier dargestellte Variante der Erfindung wird der Endabschnitt 5 zwischen einer an einem Profil 8 einer Spannvorrichtung angeordneten Befestigungsplatte 9 und einer Fixierungsplatte 10 fixiert und mittels der Bolzen 6 und der Muttern 7 an dem Profil 8 befestigt.According to Fig. 1 and 2 For example, a hammer 1 for the claimed apparatus for coring cast bodies has a shank 2 and a hammer head 3. Here, the shaft 2 of the hammer 1 is formed by a spring clip. The hammer head 3 is arranged on a free end portion 4 of the spring clip. The spring clip can be designed, for example, as a bent metal band, ie in the form of a spiral spring. As in Fig. 1 and 2 illustrated, the spring clip may be bent, for example, S-shaped. At its second free end 5, the spring clip openings for receiving bolts 6, which may be formed, for example, as a cylinder head bolts with a hexagon, have. The bolts 6 may have a thread on their outer sides and by means of corresponding nuts 7, which have a corresponding to the external thread pin 6 internal thread, are fixed. In the variant of the invention shown here, the end section 5 is fixed between a fastening plate 9 arranged on a profile 8 of a tensioning device and a fixing plate 10 and fastened to the profile 8 by means of the bolts 6 and the nuts 7.

Wie aus Fig. 2 ersichtlich ist, kann die Befestigungsplatte 9 eine nutförmige Ausnehmung zur Aufnahme des freien Endes 5 aufweisen. Die Befestigungsplatte 9 kann mit dem Profil 8 einstückig ausgebildet oder mit diesem verbunden sein, beispielsweise durch Verschrauben, verschweißen oder andere Verbindungstechniken. Zur besseren mechanischen Abstützung kann die Befestigungsplatte 9 mittels Abstützrippen 24 an dem Profil 8 abgestützt sein.How out Fig. 2 it can be seen, the mounting plate 9 may have a groove-shaped recess for receiving the free end 5. The mounting plate 9 may be integrally formed with the profile 8 or connected thereto, for example by screwing, welding or other joining techniques. For better mechanical support, the mounting plate 9 can be supported by means of support ribs 24 on the profile 8.

Der Hammerkopf 3 kann ebenfalls mittels Bolzen 11 an dem freien Ende 4 des Federbügels befestigt werden, wobei die Bolzen 11 in den Hammerkopf 3 eingedreht werden können. Bolzen 11 und Hammerkopf 3 weisen hierbei wiederum miteinander korrespondierende Gewinde auf. Durch die Bolzen 11 wird eine Fixierungsplatte 12 gegen das freie Ende 4 gepresst und dieses zwischen der Fixierungsplatte 12 und einem nutförmigen Ausnehmung in dem Hammerkopf 11 fixiert.The hammer head 3 can also be fastened by means of bolts 11 to the free end 4 of the spring clip, wherein the bolts 11 can be screwed into the hammer head 3. Bolt 11 and hammer head 3 in this case again have mutually corresponding threads. By the bolt 11, a fixing plate 12 is pressed against the free end 4 and this fixed between the fixing plate 12 and a groove-shaped recess in the hammer head 11.

An dieser Stelle sei auch darauf hingewiesen, dass der Hammerkopf 3 mit dem Schaft 2 nicht nur verschraubt sondern auch einstückig mit dem Schaft 2 ausgebildet oder mit diesem beispielsweise durch Verschweißen, Verkleben oder andere Verbindungstechniken verbunden sein kann. Gleiches gilt auch in Bezug auf die Befestigungsplatte 9 und das freie Ende 5 des Federbügels.It should also be noted that the hammer head 3 not only bolted to the shaft 2 but also integrally formed with the shaft 2 or may be connected thereto, for example, by welding, gluing or other joining techniques. The same applies with respect to the mounting plate 9 and the free end 5 of the spring clip.

Fig. 3 zeigt die Spannvorrichtung 13 im näheren Detail. Die Spannvorrichtung 13 umfasst einen Aufspannrahmen 14, eine erste fix mit dem Aufspannrahmen 14 verbundene Aufspannplatte 15, eine erste Spannplatte 16, mehrere zwischen der ersten Spannplatte 16 und einer zweiten, in Fig. 4 mit dem Bezugszeichen 17 versehenen Spannplatte angeordnete Zug-/Führungsstangen 18. Die zweite Spannplatte 17 kann auf den Führungsstanden 18 geführt und längs derselben verschiebbar sein. Fig. 3 shows the tensioning device 13 in more detail. The tensioning device 13 comprises a mounting frame 14, a first clamping plate 15 fixedly connected to the mounting frame 14, a first clamping plate 16, a plurality between the first clamping plate 16 and a second, in Fig. 4 arranged with the reference numeral 17 tension plate guide rods 18. The second clamping plate 17 may be guided on the guide posts 18 and slidable along the same.

Wie aus Fig. 4 ersichtlich ist können zwischen der zweiten Spannplatte 17 und einer Stützwand Balgzylinder 19 angeordnet sein. Wird in die Balgzylinder 19 ein flüssiges oder gasförmiges Medium eingeleitet, so bewirkt dies eine Bewegung der zweiten Spannplatte 17 auf die erste Spannplatte 16 hin beziehungsweise ein Aneinanderdrücken derselben, sodass auf diese Weise ein zwischen den Spannplatten 16 und 17 angeordneter Gegenstand in die Spannvorrichtung 13 eingespannt werden kann.How out Fig. 4 can be arranged between the second clamping plate 17 and a support wall bellows cylinder 19 may be arranged. If a liquid or gaseous medium is introduced into the bellows cylinder 19, this causes a movement of the second clamping plate 17 towards the first clamping plate 16 or a pressing together thereof, so that in this way an object arranged between the clamping plates 16 and 17 is clamped in the clamping device 13 can be.

Weiters kann die Aufspannplatte 15 eine Aufnahme für den zu entkernenden Gegenstand sowie mehrere von der Aufspannplatte 15 wegragende Zentrierungsdorne 23 aufweisen.Furthermore, the clamping plate 15 may have a receptacle for the object to be cored as well as a plurality of centering mandrels 23 protruding from the clamping plate 15.

Bei dem zu entkernenden Gegenstand kann es sich beispielsweise um einen noch mit Formsand umgebenen Gießling handeln, welcher durch Rütteln der gesamten Spannvorrichtung 13 mittels zumindest eines Schwingantriebes vom Formsand befreit werden kann. Die Schwingungen können dazu beispielsweise durch eine motorisch angetriebene und exzentrisch gelagerte Masse verursacht sein. Der Schwingantrieb selbst bzw. die Vorrichtung zum Entkernen kann bzw. können, wie in der eingangs erwähnten DE29921056 U1 ausgeführt sein.The article to be cored may be, for example, a casting still surrounded by foundry sand, which can be freed from the molding sand by shaking the entire clamping device 13 by means of at least one oscillating drive. The vibrations can be caused for example by a motor-driven and eccentrically mounted mass. The oscillating drive itself or the coring device can or can, as in the above-mentioned DE29921056 U1 be executed.

Wie erwähnt, wird die zweite Spannplatte 17 auf den Führungsstangen 18 geführt. Dies ist aber nicht zwingend notwendig. Denkbar ist beispielsweise auch dass die Zug-/Führungsstangen 18 weggelassen werden, beziehungsweise nur als Zugstangen fungieren. Die bewegbare Spannplatte 17 wird dann alleine durch die Balgzylinder 19 geführt, was durch relativ steife Ausgestaltung der Balgzylinder 19, beispielsweise in Form von Fahrzeugreifen, ermöglicht wird.As mentioned, the second clamping plate 17 is guided on the guide rods 18. But this is not absolutely necessary. It is also conceivable, for example, that the pull / guide rods 18 are omitted, or act only as tie rods. The movable clamping plate 17 is then guided solely by the bellows cylinder 19, which is made possible by relatively stiff design of the bellows cylinder 19, for example in the form of vehicle tires.

Die Spannvorrichtung 13 kann mit einem diese teilweise umgebenden Rahmen 20 aus Blattfedern mit einem Grundgestell 21 der erfindungsgemäßen Vorrichtung 22 verbunden ist.The tensioning device 13 can be connected to a frame 21 of the device 22 according to the invention by means of a frame 20 which is partially surrounded by leaf springs.

An der Spannvorrichtung 13 selbst sind mehrere Hämmer 1 federnd angeordnet bzw. in die Spannvorrichtung 13 integriert, sodass der zu entkernende Gegenstand von mehreren Seiten während des Schwingens der Spannvorrichtung durch die Hämmer 1 bearbeitet wird. Durch die Schwingungen der Spannvorrichtung, welche beispielsweise mit bis zu 20 Hz schwingt, werden die Hämmer 1 ebenfalls in Schwingungen versetzt. Hierbei weist die Spannvorrichtung Amplituden von bis zu 40 mm auf. Die Resonanzschwingung der Hämmer 1 ist bevorzugt so gewählt, dass sie im Bereich der zu erwartenden Schwingung der Spannvorrichtungen 13 liegt. Folglich liegt die Resonanzfrequenz jedes Hammers 1 bevorzugt in einem Bereich zwischen 10 und 25 Hz. Besonders bevorzugt in einem Bereich zwischen 15 und 25 Hz oder 15 und 20 Hz. Als besonders vorteilhaft hat es sich herausgestellt, wenn die Resonanzfrequenz jedes Hammers 1 in einem Bereich von +/- 20% um 20 Hz liegt.On the clamping device 13 itself several hammers 1 are resiliently arranged or integrated into the clamping device 13, so that the object to be cored is processed from several sides during the swinging of the clamping device by the hammers 1. Due to the vibrations of the clamping device, which oscillates, for example, up to 20 Hz, the hammers 1 are also vibrated. In this case, the tensioning device has amplitudes of up to 40 mm. The resonance oscillation of the hammers 1 is preferably selected such that it lies in the region of the expected oscillation of the tensioning devices 13. Consequently, the resonance frequency of each hammer 1 is preferably in a range between 10 and 25 Hz. Particularly preferred in a range between 15 and 25 Hz or 15 and 20 Hz. It has been found to be particularly advantageous if the resonance frequency of each hammer 1 is in one range of +/- 20% around 20 Hz.

Als besonders günstig hat sich die Befestigung der Hämmer 1 an dem Aufspannrahmen 14 der Spannvorrichtung 13 herausgestellt, da sich hierdurch eine optimale Klopfposition für die Hämmer 1 erzielen lässt.To be particularly favorable, the attachment of the hammers 1 has been found in the Aufspannrahmen 14 of the clamping device 13, as this can achieve an optimal knocking position for the hammers 1.

Die Ausführungsbeispiele zeigen mögliche Ausführungsvarianten des erfindungsgemäßen Hammers bzw. der erfindungsgemäßen Vorrichtung, wobei an dieser Stelle bemerkt sei, dass die Erfindung nicht auf die speziell dargestellten Ausführungsvarianten derselben eingeschränkt ist, sondern vielmehr auch diverse Kombinationen der einzelnen Ausführungsvarianten untereinander möglich sind und diese Variationsmöglichkeit aufgrund der Lehre zum technischen Handeln durch gegenständliche Erfindung im Können des auf diesem technischen Gebiet tätigen Fachmannes liegt.The embodiments show possible embodiments of the hammer according to the invention and the device according to the invention, it being noted at this point that the invention is not limited to the specifically illustrated embodiments of the same is, but rather also various combinations of the individual variants are possible with each other and this possibility of variation due to the doctrine of technical action by objective invention in the skill of those working in this technical field is the expert.

BezugszeichenaufstellungREFERENCE NUMBERS

11
Hammerhammer
22
Schaftshaft
33
Hammerkopfhammerhead
44
freies Endefree end
55
freies Endefree end
66
Bolzenbolt
77
Muttermother
88th
Profilprofile
99
Befestigungsplattemounting plate
1010
Fixierungsplattefixation plate
1111
Bolzenbolt
1212
Fixierungsplattefixation plate
1313
Spannvorrichtungjig
1414
Aufspannrahmenmounting frame
1515
Aufspannplatteplaten
1616
Spannplattechipboard
1717
Spannplattechipboard
1818
Führungsstangenguide rods
1919
BalgzylinderAir Actuators
2020
Rahmenframe
2121
Grundgestellbase frame
2222
Vorrichtungdevice
2323
ZentrierungsdornZentrierungsdorn
2424
Abstützrippencleats

Claims (8)

  1. A device (22) for removing the cores from cast bodies with sand cores, wherein the device (22) comprises a clamping device (13) for clamping a workpiece to be processed and at least one oscillating drive, which causes the clamping device (13) to oscillate, characterized in that at least one hammer (1) with a shank (2) and a hammer head (3) is resiliently arranged on the clamping device (13), wherein the shank (2) of the hammer (1) is formed by a spring bow and the hammer head (3) is arranged on a free end section (4) of the spring bow.
  2. The device according to claim 1, characterized in that the spring bow is manufactured as a metal spiral spring.
  3. The device according to claim 1 or 2, characterized in that the spring bow comprises at least one orifice for holding a mounting means on a free end section (5) opposite to the hammer head (3).
  4. The device according to one of claims 1 to 3, characterized in that the spring bow is formed with an S-shape.
  5. The device according to one of claims 1 to 4, characterized in that the hammer head (3) is detachably connected to the spring bow by means of a screw and/or plug connection.
  6. The device according to one of claims 1 to 5, characterized in that the clamping device (13) comprises a clamping frame (14) and a clamping plate (15) with at least one holder for the workpiece to be processed, wherein the at least one hammer (1) is arranged on the clamping frame (14) of the clamping device (13).
  7. The device according to one of claims 1 to 6, characterized in that the clamping plate (15) comprises centering pins (23) for the workpiece extending away from the clamping plate (15).
  8. The device according to one of claims 1 to 7, characterized in that the clamping device (13) is connected to a base frame (21) of the device (22) by means of a frame (20) of leaf springs at least partially surrounding the clamping device (13).
EP13708064.4A 2012-01-17 2013-01-17 Device for removing the cores from cast bodies Active EP2804710B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50/2012A AT512426B1 (en) 2012-01-17 2012-01-17 DEVICE FOR DECORING CASTING BODIES
PCT/AT2013/050014 WO2013106880A2 (en) 2012-01-17 2013-01-17 Device for removing the cores from cast bodies

Publications (2)

Publication Number Publication Date
EP2804710A2 EP2804710A2 (en) 2014-11-26
EP2804710B1 true EP2804710B1 (en) 2019-07-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13708064.4A Active EP2804710B1 (en) 2012-01-17 2013-01-17 Device for removing the cores from cast bodies

Country Status (5)

Country Link
EP (1) EP2804710B1 (en)
CN (1) CN104245189B (en)
AT (1) AT512426B1 (en)
MX (1) MX2014008318A (en)
WO (1) WO2013106880A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115365481A (en) * 2022-09-14 2022-11-22 江苏天宏智能装备有限公司 Vibration shakeout equipment

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE342651C (en) *
DE396729C (en) * 1923-06-13 1924-06-20 J G Schwietzke Fa Device for removing cores from castings
CH112925A (en) * 1923-12-19 1925-12-01 Gustaf Smith Carl Stone splitting machine.
AT182486B (en) * 1953-06-15 1955-07-11 Inst Tech Forschung U Entwickl Device for removing cores, especially from smaller castings
FR1376492A (en) * 1963-01-31 1964-10-31 Omnium Tech De Mecanique Method and machine for removing sand from molded work pieces
DE3504779A1 (en) * 1985-02-13 1986-08-21 Krupp Brüninghaus GmbH, 5980 Werdohl SPRING TINK AND METHOD FOR THE PRODUCTION THEREOF
US6644382B1 (en) * 1997-12-13 2003-11-11 Yoshitaka Aoyama Casting sand shake-out method and its apparatus
AT3791U1 (en) 1999-09-07 2000-08-25 Fill Gmbh DEVICE FOR COREING MOLDED BODIES WITH SAND CORES
JP4560263B2 (en) * 2002-04-09 2010-10-13 株式会社滋賀山下 Reversing sand removal method for workpieces
FR2850305B1 (en) * 2003-01-23 2005-03-18 Marcel Massin AUTOMATED DELIVERY SYSTEM AND UNLOADING DEVICE
JP4203333B2 (en) * 2003-02-05 2008-12-24 株式会社滋賀山下 Sand removal device for work
JPWO2004082870A1 (en) * 2003-03-17 2006-06-22 青山　好高 Cast sand removal equipment
DE202004021523U1 (en) * 2004-12-23 2008-09-25 "F. u. K." Frölich & Klüpfel Drucklufttechnik GmbH & Co. KG coring device
JP2007253188A (en) * 2006-03-23 2007-10-04 Shiga Yamashita:Kk Vibration type sand shaking-out apparatus
CN201291303Y (en) * 2009-03-17 2009-08-19 沈阳新光华旭铸造有限公司 Vibration sand separator
ITTO20090437A1 (en) * 2009-06-09 2010-12-10 Artimpianti S N C Di Genre Walter E Botta Alberto MACHINE MACHINE

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
AT512426A1 (en) 2013-08-15
WO2013106880A3 (en) 2014-04-03
EP2804710A2 (en) 2014-11-26
WO2013106880A2 (en) 2013-07-25
CN104245189B (en) 2016-08-31
MX2014008318A (en) 2014-08-27
AT512426B1 (en) 2016-03-15
CN104245189A (en) 2014-12-24

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