EP3411168B1 - Device for removing the core from a cast workpiece - Google Patents

Device for removing the core from a cast workpiece Download PDF

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Publication number
EP3411168B1
EP3411168B1 EP17711063.2A EP17711063A EP3411168B1 EP 3411168 B1 EP3411168 B1 EP 3411168B1 EP 17711063 A EP17711063 A EP 17711063A EP 3411168 B1 EP3411168 B1 EP 3411168B1
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EP
European Patent Office
Prior art keywords
hammer
working
piston
working cylinder
working volume
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EP17711063.2A
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German (de)
French (fr)
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EP3411168A1 (en
Inventor
Thomas Rathner
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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
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/08—Means for driving the impulse member comprising a built-in air compressor, i.e. the tool being driven by air pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/16—Valve arrangements therefor

Definitions

  • the invention relates to a device for coring a cast workpiece, according to the preamble of claim 1.
  • the workpieces For coring or sanding of workpieces which have been produced by a casting process, the workpieces can be set in vibration by means of a hammer and in this way the core can be smashed.
  • a device or a method of the type mentioned are, for example, from the DE3802385A1 as well as the JP2012024839A known.
  • Other devices for coring are from the DE10136713A1 , of the DE2217507A1 as well as the DE102011088933A1 described.
  • a disadvantage of the known solutions is, above all, that can be set in this type of construction no defined beat frequency of the hammer. This has the disadvantage that no optimal energy transfer to the destruction of the core is possible.
  • a defined beat frequency is understood to mean a predetermined beat frequency.
  • the beat frequency can be selected and adjusted as required by changing the frequency of the reciprocating compressor. Due to the direct flow connection between hammer and reciprocating compressor follows the beat frequency of the hammer directly to the set frequency of the piston movement.
  • the invention makes it possible to deliberately change the beat frequency of the hammer in a wide band range and to realize an optimal and defined energy transfer to the core.
  • a working medium which is located in the working cylinder and the at least one working volume, be a gas or gas mixture or a liquid.
  • a good coupling of the frequency of impact of the hammer to a piston movement of the reciprocating compressor can be achieved in that the plunger divides the working cylinder of the hammer into two variable size areas, a rear area located behind the plunger, viewed from the direction of the hammer head, and one from the rear area the plunger separate front portion, wherein the rear portion of the working cylinder of the hammer with the at least one working volume of the reciprocating compressor is in a permanent flow connection.
  • At least one vent opening may be arranged in the front region of the working cylinder of the at least one hammer, through which the working cylinder vented to an environment is.
  • the plunger can rebound from the hammer head and thereby be returned to a starting position.
  • the at least one reciprocating compressor is a double-acting reciprocating compressor with two counter-rotating pistons, wherein the front region of the working cylinder of the at least one hammer a working volume of a first of the two pistons and the rear region of the working cylinder of the at least one hammer with a working volume of a second of the two pistons is in a permanent flow connection.
  • the device may have a plurality of hammers.
  • each of the hammers may be in permanent fluid communication with a working volume of the first piston and / or a working volume of the second piston.
  • a rear portion of a working cylinder at least a first hammer with the working volume of the first of the two pistons and a rear portion of a working cylinder at least a second hammer with the working volume of the second of the two pistons in a permanent flow connection stand.
  • the at least one piston compressor is a crank drive piston compressor or a linear piston compressor.
  • a device 1 for coring a cast workpiece 2 has a hammer 3.
  • the hammer 3 comprises a hammer head 4 and a plunger 6 for transmitting energy to the hammer head 4.
  • the plunger 6 is movably arranged in a working cylinder 5 of the hammer 3.
  • the working cylinder 5 communicates with working volume 7a, 7b of a cyclically operating piston compressor 8 in a permanent flow connection.
  • a working medium which is located in the working cylinder 5 and the working volume 7a, 7b, a gas or gas mixture or a liquid, such as hydraulic oil, can be used.
  • the plunger 6 divides the working cylinder 5 of the hammer 3 into two variable size regions 9, 10 - a rear region 9 located behind the plunger 6, viewed from the direction of the hammer head 4, and a front region 10 separated from the rear region 9 by the plunger 6.
  • the piston compressor 8 may be a double-acting piston compressor with two counter-rotating pistons 14, 15.
  • the rear region 9 of the working cylinder 5 of the hammer 3 is in a permanent flow connection with the working volume 7b of a piston 15 of the piston compressor 8.
  • the front portion 10 is permanently connected to the working volume 7a of a piston 14. Permanent in the present context means that the working medium is always free between one of the working volumes 7a, 7b and the respective connected front 10 and / or rear portion 9 of the working cylinder 5 can flow. How out Fig. 1 it can be seen, the front portion 9 of the working cylinder 5 is connected to the working volume 7a via a line 11 and the rear portion 9 of the working cylinder 5 with the working volume 7b of the reciprocating compressor 8 via a line 12.
  • the device 1a according to the invention can also have two hammers 3a, 3b, which each have at least one vent opening 13a, 13b in the front regions 10a, 10b of the working cylinder 5a, 5b, through which the working cylinder 5a, 5b is vented to an environment.
  • the air located between the plunger 6a, 6b and the respective hammer head 4a, 4b is pressed out of the front region 9.
  • the construction of the hammers 3a, 3b is similar to that in FIG Fig. 1 illustrated hammer 3.
  • the device 1b according to the invention can also have a plurality of hammers 3a... 3f.
  • a part of the hammers 3a ... 3f with the working volume 7a of the first piston 14 and another part of the hammers 3a ... 3f with the working volume 7b of the second piston 15 are in a permanent flow connection.
  • the front portions 10c... 10f of the working cylinders 5c... 5f may each be as shown in FIG Fig. 2 be vented to the environment to be vented.
  • the hammers 3c, 3e move equal to the hammers 3d, 3f.
  • Fig. 4 can the front portions 10g, 10i of the working cylinder 5g, 5i of the hammers 3g, 3i with the working volume 7b of the second piston 15 and the front portions 10h, 10j of the working cylinder 5h, 5j of the hammers 3h, 3j with the working volume 7a of the first piston 14 are in a permanent flow connection.
  • the hammers 3g to 3j can in this case as the hammer 3 off Fig. 1 be constructed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Percussive Tools And Related Accessories (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Entkernen eines gegossenen Werkstückes, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for coring a cast workpiece, according to the preamble of claim 1.

Zum Entkernen bzw. Entsanden von Werkstücken, die mittels eines Gießverfahrens hergestellt worden sind, können die Werkstücke durch Schläge mit einem Hammer in Schwingung versetzt werden und auf diese Weise der Kern zertrümmert werden.For coring or sanding of workpieces which have been produced by a casting process, the workpieces can be set in vibration by means of a hammer and in this way the core can be smashed.

Eine Vorrichtung bzw. ein Verfahren der eingangs genannten Art sind beispielsweise aus der DE3802385A1 sowie der JP2012024839A bekannt geworden. Weitere Vorrichtungen zum Entkernen sind aus der DE10136713A1 , der DE2217507A1 sowie der DE102011088933A1 beschrieben.A device or a method of the type mentioned are, for example, from the DE3802385A1 as well as the JP2012024839A known. Other devices for coring are from the DE10136713A1 , of the DE2217507A1 as well as the DE102011088933A1 described.

Nachteilig an den bekannten Lösungen ist vor allem, dass sich bei diesen bauartbedingt keine definierte Schlagfrequenz des Hammers einstellen lässt. Dies hat den Nachteil, dass keine optimale Energieübertragung zur Zertrümmerung des Kerns möglich ist.A disadvantage of the known solutions is, above all, that can be set in this type of construction no defined beat frequency of the hammer. This has the disadvantage that no optimal energy transfer to the destruction of the core is possible.

Es ist daher eine Aufgabe der Erfindung, die oben genannten Nachteile des Stands der Technik zu überwinden.It is therefore an object of the invention to overcome the above-mentioned disadvantages of the prior art.

Diese Aufgabe wird durch eine Vorrichtung der eingangs genannte Art erfindungsgemäß durch die Merkmale des kennzeichnenden Teils von Anspruchs 1 gelöst.This object is achieved by a device of the type mentioned according to the invention by the features of the characterizing part of claim 1.

Die erfindungsgemäße Lösung ermöglicht auf einfache Weise die Einstellung einer definierten Schlagfrequenz. Unter einer definierten Schlagfrequenz wird hierbei eine vorab festgelegte Schlagfrequenz verstanden. Die Schlagfrequenz kann je nach Erfordernis gewählt und eingestellt werden, indem die Frequenz des Kolbenverdichters verändert wird. Aufgrund der direkten Strömungsverbindung zwischen Hammer und Kolbenverdichter folgt die Schlagfrequenz des Hammers unmittelbar der eingestellten Frequenz der Kolbenbewegung. Somit ermöglicht es die Erfindung, in einem weiten Bandbereich die Schlagfrequenz des Hammers gezielt zu verändern und eine optimale und definierte Energieübertragung auf den Kern zu realisieren.The solution according to the invention makes it easy to set a defined beat frequency. In this case, a defined beat frequency is understood to mean a predetermined beat frequency. The beat frequency can be selected and adjusted as required by changing the frequency of the reciprocating compressor. Due to the direct flow connection between hammer and reciprocating compressor follows the beat frequency of the hammer directly to the set frequency of the piston movement. Thus, the invention makes it possible to deliberately change the beat frequency of the hammer in a wide band range and to realize an optimal and defined energy transfer to the core.

Gemäß einer vorteilhaften Variante der Erfindung, welche eine gute Energieübertragung von dem Kolbenverdichter zu dem Hammerkopf ermöglicht, kann es vorgesehen sein, dass ein Arbeitsmedium, welches sich in dem Arbeitszylinder und dem zumindest einen Arbeitsvolumen befindet, ein Gas oder Gasgemisch oder eine Flüssigkeit sein.According to an advantageous variant of the invention, which allows a good transfer of energy from the piston compressor to the hammer head, it can be provided that a working medium, which is located in the working cylinder and the at least one working volume, be a gas or gas mixture or a liquid.

Eine gute Kopplung der Schlagfrequenz des Hammers an eine Kolbenbewegung des Kolbenverdichters lässt sich dadurch erreichen, dass der Stößel den Arbeitszylinder des Hammers in zwei Bereiche variabler Größe teilt, einen aus Richtung des Hammerkopfes betrachtet hinter dem Stößel gelegenen hinteren Bereich und einen von dem hinteren Bereich durch den Stößel getrennten vorderen Bereich, wobei der hintere Bereich des Arbeitszylinders des Hammers mit dem zumindest einen Arbeitsvolumen des Kolbenverdichters in einer permanenten Strömungsverbindung steht.A good coupling of the frequency of impact of the hammer to a piston movement of the reciprocating compressor can be achieved in that the plunger divides the working cylinder of the hammer into two variable size areas, a rear area located behind the plunger, viewed from the direction of the hammer head, and one from the rear area the plunger separate front portion, wherein the rear portion of the working cylinder of the hammer with the at least one working volume of the reciprocating compressor is in a permanent flow connection.

Um eine sehr gute Energieübertragung von dem Stößel auf den Hammer zu ermöglichen, ohne dass der Stößel durch einen Luftpolster abgebremst wird, kann in dem vorderen Bereich des Arbeitszylinders des zumindest einen Hammers zumindest eine Entlüftungsöffnung angeordnet sein, durch welche der Arbeitszylinder zu einer Umgebung hin entlüftet ist. Bei dieser Ausführungsform der Erfindung kann der Stößel von dem Hammerkopf abprallen und dadurch wieder in eine Ausgangslage zurückgebracht werden.In order to allow a very good energy transfer from the plunger to the hammer, without the plunger is braked by an air cushion, at least one vent opening may be arranged in the front region of the working cylinder of the at least one hammer, through which the working cylinder vented to an environment is. In this embodiment of the invention, the plunger can rebound from the hammer head and thereby be returned to a starting position.

Um zu gewährleisten, dass der Stößel der Bewegung des Kolbenverdichters folgt und an diese fest gekoppelt ist, kann es vorgesehen sein, dass der zumindest eine Kolbenverdichter ein doppelwirkender Kolbenverdichter mit zwei gegenläufig arbeitenden Kolben ist, wobei der vordere Bereich des Arbeitszylinders des zumindest einen Hammers mit einem Arbeitsvolumen eines ersten der beiden Kolben und der hintere Bereich des Arbeitszylinders des zumindest einen Hammers mit einem Arbeitsvolumen eines zweiten der beiden Kolben in einer permanenten Strömungsverbindung steht.In order to ensure that the plunger follows the movement of the reciprocating compressor and is fixedly coupled to it, it can be provided that the at least one reciprocating compressor is a double-acting reciprocating compressor with two counter-rotating pistons, wherein the front region of the working cylinder of the at least one hammer a working volume of a first of the two pistons and the rear region of the working cylinder of the at least one hammer with a working volume of a second of the two pistons is in a permanent flow connection.

Um einen optimalen Energieeintrag in das Werkstück zu erzielen, kann die Vorrichtung mehrere Hämmer aufweisen.In order to achieve an optimal energy input into the workpiece, the device may have a plurality of hammers.

Vorteilhafterweise kann jeder der Hämmer mit einem Arbeitsvolumen des ersten Kolbens und/oder einem Arbeitsvolumen des zweiten Kolbens in einer permanenten Strömungsverbindung stehen.Advantageously, each of the hammers may be in permanent fluid communication with a working volume of the first piston and / or a working volume of the second piston.

Um ein phasenverschobenes Hämmern auf das Werkstück zu ermöglichen, kann ein hinterer Bereich eines Arbeitszylinders zumindest eines ersten Hammers mit dem Arbeitsvolumen des ersten der beiden Kolben und ein hinterer Bereich eines Arbeitszylinders zumindest eines zweiten Hammers mit dem Arbeitsvolumen des zweiten der beiden Kolben in einer permanenten Strömungsverbindung stehen. Hierbei ist es von Vorteil hinsichtlich der Synchronisierung der Hammerschläge mit den Kolbenbewegungen, wenn ein vorderer Bereich des Arbeitszylinders des zumindest einen ersten Hammers mit dem Arbeitsvolumen des zweiten der beiden Kolben und ein vorderer Bereich des Arbeitszylinders des zumindest einen zweiten Hammers mit dem Arbeitsvolumen des ersten der beiden Kolben in einer permanenten Strömungsverbindung stehen.In order to enable a phase-shifted hammering on the workpiece, a rear portion of a working cylinder at least a first hammer with the working volume of the first of the two pistons and a rear portion of a working cylinder at least a second hammer with the working volume of the second of the two pistons in a permanent flow connection stand. In this case, it is advantageous with regard to the synchronization of the hammer blows with the piston movements when a front region of the working cylinder of the at least one first hammer with the working volume of the second of the two pistons and a front region of the working cylinder of the at least one second hammer with the working volume of the first of the both pistons are in a permanent flow connection.

Als besonders vorteilhaft hinsichtlich der Steuerung hat es sich herausgestellt, wenn der zumindest eine Kolbenverdichter ein Kurbeltrieb-Kolbenverdichter oder ein Linearkolbenverdichter ist.It has proved to be particularly advantageous with regard to the control if the at least one piston compressor is a crank drive piston compressor or a linear piston compressor.

Zum besseren Verständnis der Erfindung wird diese anhand der nachfolgenden Figuren näher erläutert.For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

Es zeigen jeweils in stark vereinfachter, schematischer Darstellung;

Fig. 1
eine erste Variante einer erfindungsgemäßen Vorrichtung;
Fig. 2
eine zweite Variante einer erfindungsgemäßen Vorrichtung;
Fig. 3
eine dritte Variante einer erfindungsgemäßen Vorrichtung;
Fig. 4
eine vierte Variante einer erfindungsgemäßen Vorrichtung.
Each shows in a highly simplified, schematic representation;
Fig. 1
a first variant of a device according to the invention;
Fig. 2
a second variant of a device according to the invention;
Fig. 3
a third variant of a device according to the invention;
Fig. 4
a fourth variant 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 diese Lageangaben bei einer Lageänderung sinngemäß auf die neue Lage zu übertragen.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 location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.

Gemäß Fig. 1 weist eine erfindungsgemäße Vorrichtung 1 zum Entkernen eines gegossenen Werkstückes 2 einen Hammer 3 auf. Der Hammer 3 umfasst einen Hammerkopf 4 und einen Stößel 6 zur Energieübertragung auf den Hammerkopf 4. Der Stößel 6 ist in einem Arbeitszylinder 5 des Hammers 3 beweglich angeordnet. Der Arbeitszylinder 5 steht mit Arbeitsvolumen 7a, 7b eines zyklisch arbeitenden Kolbenverdichters 8 in einer permanenten Strömungsverbindung.According to Fig. 1 For example, a device 1 according to the invention for coring a cast workpiece 2 has a hammer 3. The hammer 3 comprises a hammer head 4 and a plunger 6 for transmitting energy to the hammer head 4. The plunger 6 is movably arranged in a working cylinder 5 of the hammer 3. The working cylinder 5 communicates with working volume 7a, 7b of a cyclically operating piston compressor 8 in a permanent flow connection.

Als Arbeitsmedium, welches sich in dem Arbeitszylinder 5 und den Arbeitsvolumen 7a, 7b befindet, kann ein Gas oder Gasgemisch oder eine Flüssigkeit, beispielsweise Hydrauliköl, verwendet werden.As a working medium, which is located in the working cylinder 5 and the working volume 7a, 7b, a gas or gas mixture or a liquid, such as hydraulic oil, can be used.

Der Stößel 6 teilt den Arbeitszylinder 5 des Hammers 3 in zwei Bereiche 9, 10 variabler Größe - einen aus Richtung des Hammerkopfes 4 betrachtet hinter dem Stößel 6 gelegenen hinteren Bereich 9 und einen von dem hinteren Bereich 9 durch den Stößel 6 getrennten vorderen Bereich 10.The plunger 6 divides the working cylinder 5 of the hammer 3 into two variable size regions 9, 10 - a rear region 9 located behind the plunger 6, viewed from the direction of the hammer head 4, and a front region 10 separated from the rear region 9 by the plunger 6.

Der Kolbenverdichter 8 kann ein doppelwirkender Kolbenverdichter mit zwei gegenläufig arbeitenden Kolben 14, 15 sein. Der hintere Bereich 9 des Arbeitszylinders 5 des Hammers 3 steht mit dem Arbeitsvolumen 7b eines Kolbens 15 des Kolbenverdichters 8 in einer permanenten Strömungsverbindung. Während der vordere Bereich 10 mit dem Arbeitsvolumen 7a eines Kolbens 14 permanent in Verbindung steht. Permanent bedeutet in dem vorliegenden Zusammenhang, dass das Arbeitsmedium stets frei zwischen einem der Arbeitsvolumen 7a, 7b und dem jeweiligen verbundenen vorderen 10 und/oder hinteren Bereich 9 des Arbeitszylinders 5 strömen kann. Wie aus Fig. 1 ersichtlich ist, ist der vordere Bereich 9 des Arbeitszylinders 5 mit dem Arbeitsvolumen 7a über eine Leitung 11 und der hintere Bereich 9 des Arbeitszylinders 5 mit dem Arbeitsvolumens 7b des Kolbenverdichters 8 über eine Leitung 12 verbunden.The piston compressor 8 may be a double-acting piston compressor with two counter-rotating pistons 14, 15. The rear region 9 of the working cylinder 5 of the hammer 3 is in a permanent flow connection with the working volume 7b of a piston 15 of the piston compressor 8. While the front portion 10 is permanently connected to the working volume 7a of a piston 14. Permanent in the present context means that the working medium is always free between one of the working volumes 7a, 7b and the respective connected front 10 and / or rear portion 9 of the working cylinder 5 can flow. How out Fig. 1 it can be seen, the front portion 9 of the working cylinder 5 is connected to the working volume 7a via a line 11 and the rear portion 9 of the working cylinder 5 with the working volume 7b of the reciprocating compressor 8 via a line 12.

Gemäß Figur 2 kann die erfindungsgemäße Vorrichtung 1a auch zwei Hämmer 3a, 3b aufweisen, die in den vorderen Bereichen 10a, 10b des Arbeitszylinders 5a, 5b je mindestens eine Entlüftungsöffnung 13a, 13b aufweisen, durch welche der Arbeitszylinder 5a, 5b zu einer Umgebung hin entlüftet ist. Auf diese Weise wird bei einer Abwärtsbewegung des Stößels 6a, 6b die zwischen dem Stößel 6a, 6b und dem jeweiligen Hammerkopf 4a, 4b befindliche Luft aus dem vorderen Bereich 9 gepresst. Ansonsten gleicht der Aufbau der Hämmer 3a, 3b jenem in Fig. 1 dargestellten Hammer 3.According to FIG. 2 For example, the device 1a according to the invention can also have two hammers 3a, 3b, which each have at least one vent opening 13a, 13b in the front regions 10a, 10b of the working cylinder 5a, 5b, through which the working cylinder 5a, 5b is vented to an environment. In this way, during a downward movement of the plunger 6a, 6b, the air located between the plunger 6a, 6b and the respective hammer head 4a, 4b is pressed out of the front region 9. Otherwise, the construction of the hammers 3a, 3b is similar to that in FIG Fig. 1 illustrated hammer 3.

Wie in Fig. 3 dargestellt, kann die erfindungsgemäße Vorrichtung 1b auch mehrere Hämmer 3a...3f aufweisen.As in Fig. 3 1, the device 1b according to the invention can also have a plurality of hammers 3a... 3f.

Hierbei kann ein Teil der Hämmer 3a...3f mit dem Arbeitsvolumen 7a des ersten Kolbens 14 und ein anderer Teil der Hämmer 3a... 3f mit dem Arbeitsvolumen 7b des zweiten Kolbens 15 in einer permanenten Strömungsverbindung stehen.Here, a part of the hammers 3a ... 3f with the working volume 7a of the first piston 14 and another part of the hammers 3a ... 3f with the working volume 7b of the second piston 15 are in a permanent flow connection.

Hierbei sind die aus Sicht der Hammerköpfe 4c, 4e hinter den Stößeln 6c, 6e gelegenen Bereiche 9c, 9e der Hämmer 3c, 3e mit dem Arbeitsvolumen 7a und die aus Sicht der Hammerköpfe 4d, 4f hinter den Stößeln 6d, 6f gelegenen Bereiche 9d, 9f der Hämmer 3d, 3f mit dem Arbeitsvolumen 7b verbunden. Die vorderen Bereiche 10c ... 10f der Arbeitszylinder 5c... 5f können jeweils so wie in Fig. 2 dargestellt zur Umgebung hin entlüftet sein. Bei dem dargestellten Ausführungsbeispiel bewegen sich die Hämmern 3c, 3e gegengleich zu den Hämmern 3d, 3f.Here are the view from the hammer heads 4c, 4e behind the plungers 6c, 6e located areas 9c, 9e of the hammers 3c, 3e with the working volume 7a and the view of the hammer heads 4d, 4f behind the plungers 6d, 6f located areas 9d, 9f the hammers 3d, 3f connected to the working volume 7b. The front portions 10c... 10f of the working cylinders 5c... 5f may each be as shown in FIG Fig. 2 be vented to the environment to be vented. In the illustrated embodiment, the hammers 3c, 3e move equal to the hammers 3d, 3f.

Gemäß Fig. 4 können die vorderen Bereiche 10g, 10i der Arbeitszylinders 5g, 5i der Hämmer 3g, 3i mit dem Arbeitsvolumen 7b des zweiten Kolbens 15 und die vorderen Bereiche 10h, 10j der Arbeitszylinder 5h, 5j der Hämmer 3h, 3j mit dem Arbeitsvolumen 7a des ersten Kolbens 14 in einer permanenten Strömungsverbindung stehen. Die Hämmer 3g bis 3j können hierbei so wie der Hammer 3 aus Fig. 1 aufgebaut sein.According to Fig. 4 can the front portions 10g, 10i of the working cylinder 5g, 5i of the hammers 3g, 3i with the working volume 7b of the second piston 15 and the front portions 10h, 10j of the working cylinder 5h, 5j of the hammers 3h, 3j with the working volume 7a of the first piston 14 are in a permanent flow connection. The hammers 3g to 3j can in this case as the hammer 3 off Fig. 1 be constructed.

Der Ordnung halber sei abschließend darauf hingewiesen, dass zum besseren Verständnis des Aufbaus der erfindungsgemäßen Vorrichtung diese bzw. deren Bestandteile teilweise unmaßstäblich und/oder vergrößert und/oder verkleinert dargestellt wurden.For the sake of order, it should finally be pointed out that, for a better understanding of the structure of the device according to the invention, these or their components have been shown partly unevenly and / or enlarged and / or reduced in size.

BezugszeichenaufstellungREFERENCE NUMBERS

1, la...c1, la ... c
Vorrichtungdevice
22
Werkstückworkpiece
3, 3a...j3, 3a ... j
Hammerhammer
4, 4a...j4, 4a ... j
Hammerkopfhammerhead
5, 5a...j5, 5a ... j
Arbeitszylinderworking cylinder
6, 6a..j6, 6a..j
Stößeltappet
7a, b7a, b
Arbeitsvolumenworkload
88th
Kolbenverdichterpiston compressor
9, 9a...j9, 9a ... j
BereichArea
10, 10a...j10, 10a ... j
BereichArea
1111
Leitungmanagement
1212
Leitungmanagement
13a, 13b13a, 13b
Entlüftungsöffnungvent
1414
Kolbenpiston
1515
Kolbenpiston

Claims (10)

  1. A device (1, 1a ... 1c) for removing the core from a cast workpiece (2), wherein the device (1) comprises at least one hammer (3), wherein the at least one hammer (3) has at least one hammer head (4) and at least one tappet (6) that transfers energy to the hammer head (4) and is movably arranged in a working cylinder (5) of the hammer (3), characterized in that the working cylinder (5) is permanently fluidically connected to at least one working volume (7a, 7b) of a cyclically working piston compressor (8).
  2. The device according to claim 1, characterized in that a working medium, which is located in the working cylinder (5) and the at least one working volume (7a, 7b), is a gas or a gaseous mixture or a liquid.
  3. The device according to claim 1 or 2, characterized in that the tappet (6) separates the working cylinder (5) of the hammer (3) into two regions (9, 10) of variable size, a rear region (9) located behind the tappet (6) as seen from the direction of the hammer head (4) and a front region (10) separated from the rear region (9) by the tappet (6), wherein the rear region (9) of the working cylinder (5) of the hammer (3) is permanently fluidically connected to the at least one working volume (7a, 7b) of the piston compressor (8).
  4. The device according to claim 3, characterized in that at least one vent opening (13a, 13b), through which the working cylinder (5a, 5b) is vented towards its surrounding, is arranged in the front region (10) of the working cylinder (5a, 5b) of the at least one hammer (3a, 3b).
  5. The device according to one of claims 3 or 4, characterized in that the at least one piston compressor (8) is a double-acting piston compressor with two pistons (14, 15) operating in opposite directions, wherein the front region (10) of the working cylinder (5) of the at least one hammer is permanently fluidically connected to a working volume (7a) of a first piston (14) of the two pistons (14, 15) and the rear region (9) of the working cylinder (5) of the at least one hammer (3) is permanently fluidically connected to a working volume (7b) of a second piston (15) of the two pistons (14, 15).
  6. The device according to one of claims 1 to 5, characterized in that it comprises several hammers (3a ... 3k).
  7. The device according to claims 5 and 6, characterized in that each of the hammers (3a ... 3j) is permanently fluidically connected to a working volume (7a) of the first piston (14) and/or a working volume (7b) of the second piston (15).
  8. The device according to claim 7, characterized in that a rear region (9a ... 9j) of a working cylinder (5a ... 5j) of at least one first hammer (3a ... 3j) is permanently fluidically connected to the working volume (7a) of the first piston (14) of the two pistons (14, 15) and a rear region (9a ... 9j) of a working cylinder (5a ... 5k) of at least one second hammer (9a ... 9j) is permanently fluidically connected to the working volume (7b) of the second piston (15) of the two pistons (14, 15).
  9. The device according to claim 8, characterized in that a front region (10, 10a ... 10j) of the working cylinder (5, 5a ... 5j) of the at least one first hammer (3a ... 3j) is permanently fluidically connected to the working volume (7b) of the second piston (15) of the two pistons (14, 15) and a front region (10, 10a ... 10j) of the working cylinder (5, 5a ... 5j) of the at least one second hammer (3a ... 3j) is permanently fluidically connected to the working volume (7a) of the first piston (14) of the two pistons (14, 15).
  10. The device according to one of claims 1 to 9, characterized in that the at least one piston compressor (8) is a crank mechanism piston compressor or a linear piston compressor.
EP17711063.2A 2016-02-02 2017-02-01 Device for removing the core from a cast workpiece Active EP3411168B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50060/2016A AT518203B1 (en) 2016-02-02 2016-02-02 Device for coring a cast workpiece
PCT/AT2017/060014 WO2017132715A1 (en) 2016-02-02 2017-02-01 Device for removing the core from a cast workpiece

Publications (2)

Publication Number Publication Date
EP3411168A1 EP3411168A1 (en) 2018-12-12
EP3411168B1 true EP3411168B1 (en) 2019-11-20

Family

ID=58346988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17711063.2A Active EP3411168B1 (en) 2016-02-02 2017-02-01 Device for removing the core from a cast workpiece

Country Status (3)

Country Link
EP (1) EP3411168B1 (en)
AT (1) AT518203B1 (en)
WO (1) WO2017132715A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2217507B1 (en) * 1972-04-12 1973-08-09 Bauer, Karlheinz, Dr.-Ing., 8898 Schrobenhausen Hydraulic hammer and its use for hammer drill
DE3802385A1 (en) * 1987-08-27 1989-08-10 Froelich & Kluepfel Druckluft Apparatus for removing cores from castings
DE29616860U1 (en) * 1996-09-27 1996-12-05 Vaw Mandl & Berger Gmbh, Linz Device for monitoring the coring of castings
DE20015069U1 (en) * 2000-08-31 2000-12-21 "F. u. K." Frölich & Klüpfel Drucklufttechnik GmbH & Co KG, 42285 Wuppertal Device for coring castings and tapping device therefor
JP5641408B2 (en) * 2010-07-23 2014-12-17 株式会社ヨーマー Vibration hammering sand blasting machine and multiple installation vibration hammering sand blasting machine
DE102011088933A1 (en) * 2011-12-19 2013-06-20 Robert Bosch Gmbh Tool device for handheld power tool i.e. hammer drill, has working body that is movable back and forth by application of force, and pressure control valve to control and/or regulate acceleration profile of working body

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
AT518203A1 (en) 2017-08-15
AT518203B1 (en) 2019-09-15
WO2017132715A1 (en) 2017-08-10
EP3411168A1 (en) 2018-12-12

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