EP1588056B1 - Method for the production of piston-type accumulators - Google Patents

Method for the production of piston-type accumulators Download PDF

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Publication number
EP1588056B1
EP1588056B1 EP04702305A EP04702305A EP1588056B1 EP 1588056 B1 EP1588056 B1 EP 1588056B1 EP 04702305 A EP04702305 A EP 04702305A EP 04702305 A EP04702305 A EP 04702305A EP 1588056 B1 EP1588056 B1 EP 1588056B1
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EP
European Patent Office
Prior art keywords
storage housing
longitudinal edge
lid component
cover part
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04702305A
Other languages
German (de)
French (fr)
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EP1588056A1 (en
Inventor
Herbert Baltes
Walter Dorr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydac Technology GmbH
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Hydac Technology GmbH
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Filing date
Publication date
Application filed by Hydac Technology GmbH filed Critical Hydac Technology GmbH
Priority to EP07007946A priority Critical patent/EP1808605B1/en
Publication of EP1588056A1 publication Critical patent/EP1588056A1/en
Application granted granted Critical
Publication of EP1588056B1 publication Critical patent/EP1588056B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
    • F15B2201/312—Sealings therefor, e.g. piston rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports
    • F15B2201/4155—Gas ports having valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/60—Assembling or methods for making accumulators
    • F15B2201/605—Assembling or methods for making housings therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49394—Accumulator making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49915—Overedge assembling of seated part
    • Y10T29/49917—Overedge assembling of seated part by necking in cup or tube wall
    • Y10T29/49918—At cup or tube end

Definitions

  • the invention relates to a method for producing piston accumulators according to the feature configuration of the preamble of claim 1.
  • Piston accumulator as exemplified in the DE 2 238 211 A are shown in the broadest sense belong to the so-called hydraulic accumulators, which serve, inter alia, to hold certain volumes of pressurized fluid (hydraulic medium) of a hydraulic system and return them to the system if necessary. Since the hydraulic medium is under pressure, the hydraulic accumulators are treated like pressure vessels and must be designed for the maximum operating pressure, taking into account the acceptance standards of various installation countries. In most hydro plants today hydropneumatic (gas-loaded) memory are used with separating element, wherein the piston accumulators as a separating element serves a piston which separates a liquid space as a working space of a gas space as another working space within the storage housing of the piston accumulator. Nitrogen is regularly used as working gas and the gas-tight piston largely allows a decoupling of gas space to liquid space.
  • piston accumulator receives liquid and the gas is compressed. With decreasing pressure, the compressed gas expands, displacing the stored pressure fluid back into the hydraulic circuit.
  • the essential components of a piston accumulator are therefore as an accumulator housing an outer cylinder tube, the piston as a separating element with its sealing system and the front-side cap, which at the same time include a liquid and gas connection as cover parts.
  • the memory housing regularly two functions, namely once to stockpile the internal pressure and to ensure the other hand, the leadership of the piston within the storage enclosure.
  • the front side of the interior of the storage enclosure relative to the environment final lid parts are provided on the outer peripheral side with an external thread in a corresponding internal thread along the free longitudinal edge of the storage enclosure via a specifiable distance can be screwed.
  • the preparation of the pertinent threaded connection is time consuming, which increases the cost of manufacturing the piston accumulator accordingly.
  • safety measures must be taken to secure the inserted cover part in its position in the storage housing.
  • the invention has the object to further improve the known manufacturing process for piston accumulator that with low manufacturing costs a functionally reliable and secure connection of a cover part in the storage housing of a piston accumulator is ensured and that damage to the cover part can be avoided.
  • This object is achieved by a method having the features of claim 1 in its entirety.
  • the cover part can be set against this stop during the feed movement of the free longitudinal edge of the storage housing. Additionally or alternatively, however, it is also possible to simply insert the cover part at the free end of the storage housing and then trigger the delivery movement for the free longitudinal edge of the storage housing.
  • the Zustellterrorism can take place against the top cover, if the cover part is held in a pertinent position; but it would also be conceivable, a free delivery movement for Run the longitudinal edge, then then to move in the ready state, the cover part on the run in the storage chamber piston against the free longitudinal edge, which then makes such a clamp here.
  • a forming tool is provided which provided with Zustellschrägen the longitudinal edge of the storage housing on the cover part such that this is determined in the manner of said clamping fit in the storage enclosure.
  • the method according to the invention take in a common feed movement to the storage housing two forming tools on opposite sides before the fixing process for the respective end cover part by acting on the respective free longitudinal edge of the storage enclosure. It has proven to be very advantageous for the generation of high locking forces to deliver both free ends of the cylindrical storage enclosure alike, said acting at one end of the storage enclosure forming tool can safely support the forces from the other side during the forming process with the other forming tool be introduced into the storage enclosure.
  • the piston accumulator which is shown in FIG. 1 and belongs to the prior art, has as an accumulator housing 10 an outer cylinder tube in which a piston 12 with its outer peripheral sealing system 14 can be moved longitudinally as a separating element.
  • the piston 12 separates within the storage housing 10, two working spaces 16,18 from each other, wherein the one working space 16 of the inclusion of a working gas, in particular in the form of nitrogen, is used and the other second working space 18 forms the so-called.
  • the displacement position of the piston 12 and consequently the volume proportions of gas and fluid in the work spaces 16 and 18 vary.
  • a cover part 20, 22 is arranged with a gas connection 24 for replenishing the nitrogen working gas and with a fluid port 26 for connecting the piston accumulator to a not-shown hydro overall system.
  • the two cover parts 20,22 are each provided with an external thread 28 which is engageable with an internal thread 30 which is arranged to extend along the free longitudinal edge 32 and opens outwards into the open.
  • the respective cover part 20, 22 is provided with a seal 34 for sealing the interior of the storage housing 10 from the surroundings.
  • the attachment of the threaded sections 28,30 is associated with a certain manufacturing effort, which can be costly and expensive to manufacture the known piston accumulator.
  • an anti-twist device for the respective cover part 20, 22 is necessary in order to ensure its positional fixation within the storage housing 10.
  • a possible anti-rotation for the respective Dekkelteil 20,22 may consist in that along the threads 28,30 provides a conventional adhesive assurance or the cover part is held with a conventional retaining hole (with and without thread) in position.
  • the inventive method is characterized, inter alia, that the respective cover part, here the cover part 20, with its one lower side 36 against a stop 38 in the form of an annular surface in the interior of the storage enclosure 10 is inserted into this, wherein on the opposite side 40 of Lid portion 20 of this is determined over the free longitudinal edge 32 of the storage enclosure 10, for which purpose the longitudinal edge 32 undergoes a feed movement to the cover part 20, which will be explained in more detail below.
  • a forming tool 42 which is provided with at least one feed bevel 44, which sets the longitudinal edge 32 on the lid member 20 that this in the manner of a clamping fit in the storage housing 10 between the stop 38 and the Longitudinal edge 32 is fixed.
  • the upper side 40 of the cover part 20 is provided with a contact surface 46, which is arranged conically to the longitudinal axis 48 of the storage housing 10 extending.
  • the inclination of the pertinent contact surface 46 corresponds to the inclination of the feed bevel 44 of the forming tool 42; but here are also other obvious inclinations or slopes conceivable.
  • the feed direction for the forming tool 42 is the longitudinal axis 48 of the storage housing 10 or of the entire piston accumulator.
  • the separating element in the form of the piston 12 has been omitted in FIG. 2, just like the gas connection 24 shown in FIG. 1, which is also an integral part of the upper cover part 20 here.
  • the upper free end of the storage housing with its upper longitudinal edge 32 has a contour according to one of the representations according to Figures 3 to 6.
  • the longitudinal edge 32 is preferably provided on its side facing the cover part 20 and outwardly oriented with a conical insertion bevel 50.
  • the pertinent insertion bevel 50 facilitates the insertion of the cover part 20 in the free upper end of the storage housing 10, which will be explained in more detail below.
  • the free longitudinal edge 32 which in particular the illustration of Figures 4 and 5 shows the outside circumference and the free end of the storage enclosure 10 oriented towards be provided with a sliding bevel 52, which facilitates the longitudinal edge 32, according to its cylindrical shape the views according to Figures 3 to 6 in an zuplanned inclined position, wherein the sliding bevel 52 then slides along the feed slope 44 of the forming tool 42, provided that it is increasingly placed on the storage housing 10 in the feed direction. If the feed movement is completed with the forming tool 42, the longitudinal edge 32 is inclined to the cover part 20 along its contact surface 46 in the manner of a Festleschräge and thus holding the lid member 20 against the stop 38 in the interior of the storage enclosure 10 fixed.
  • the free longitudinal edge 32 along its free end with a supernatant over the overhead second side 40 of the cover part 20 is guided.
  • the forming tool 42 is moved away from the storage housing 10 again and then takes, for example, its upper position shown in Figure 2 a.
  • the forming process for the respective longitudinal edge 32 of the storage housing 10 is cold; but it is also a hot forming conceivable with appropriate heating of the storage housing material and preferably the forming tool 42 itself.
  • a material for the storage housing 10 with its longitudinal edge 32 is a conventional, good moldable steel material used.
  • the height of the cover part 20 is adapted in each case to the predetermined by the operation of the storage conditions.
  • the cover part 20 is at least twice as large as the length of the longitudinal edge 32 between its free end and a deflection point 54, from which the longitudinal edge 32 is placed on the lid top.
  • a particularly preferred embodiment (not shown) of the method according to the invention is in a common feed movement two forming tools 42 on opposite sides of the storage housing 10 of the fixing process for the respective end-side cover part 20,22 made simultaneously and together with substantially the same forming forces by acting on the respective free longitudinal edge 32 of the storage enclosure 10.
  • the respective opposite forming tool can simultaneously absorb the forces of the other forming tool during forming, as they occur during the forming process.
  • the pertinent embodiment can be saved on elaborate supporting devices on the respective opposite sides, where the forming tool 42 does not act. Also, such a harmonic introduction of force into the storage housing 10 occurs without the occurrence of damaging force peaks.
  • the Aufsetzwerkmaschine 56 has a receiving space 60, in which the upper end of the storage enclosure 10 is receivable, so that the Zu manufacturedschräge 58 flush with the upper edge of the longitudinal edge 32 and the rest continuously in the receiving area 62 for the actual cover part 20th , 22 in the memory housing 10 passes.
  • the storage housing 10 along its upper longitudinal edge 32 on the inner peripheral side and outwardly expanding with the insertion 50, which results in a kind of shortened slip edge over which the respective cover part 20,22 in the same way introduce and then set later.
  • the pertinent variant can be chosen if the lid seal 34 proves to be robust and should not be too vulnerable to damage.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Actuator (AREA)

Abstract

The production process produces a piston-type accumulator with a housing (10) and a separate piston. The endfaces of the housing are each sealed by a cover part (20), fixed on one side (40) via the free longitudinal edge (32) of the housing, which is displaced towards the cover part to fit it in a positive secure connection.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von Kolbenspeichern gemäß der Merkmalsausgestaltung des Oberbegriffes des Patentanspruches 1.The invention relates to a method for producing piston accumulators according to the feature configuration of the preamble of claim 1.

Kolbenspeicher wie sie beispielhaft in der DE 2 238 211 A aufgezeigt sind, gehören im weitesten Sinne zu den sog. Hydrospeichern, die unter anderem dazu dienen, bestimmte Volumen unter Druck stehender Flüssigkeit (Hydraulikmedium) einer Hydroanlage aufzunehmen und diese bei Bedarf an die Anlage zurückzugeben. Da sich das Hydraulikmedium unter Druck befindet, werden die Hydrospeicher wie Druckbehälter behandelt und müssen für den maximalen Betriebsüberdruck unter Berücksichtigung der Abnahmestandards von diversen Aufstellungsländern ausgelegt sein. In den meisten Hydroanlagen werden heutzutage hydropneumatische (gasbeaufschlagte) Speicher mit Trennelement eingesetzt, wobei bei den Kolbenspeichern als Trennelement ein Kolben dient, der innerhalb des Speichergehäuses des Kolbenspeichers einen Flüssigkeitsraum als Arbeitsraum von einem Gasraum als weiteren Arbeitsraum trennt. Als Arbeitsgas kommt regelmäßig Stickstoff zum Einsatz und der gasdichte Kolben erlaubt weitgehend eine Entkopplung von Gasraum zu Flüssigkeitsraum.Piston accumulator as exemplified in the DE 2 238 211 A are shown in the broadest sense belong to the so-called hydraulic accumulators, which serve, inter alia, to hold certain volumes of pressurized fluid (hydraulic medium) of a hydraulic system and return them to the system if necessary. Since the hydraulic medium is under pressure, the hydraulic accumulators are treated like pressure vessels and must be designed for the maximum operating pressure, taking into account the acceptance standards of various installation countries. In most hydro plants today hydropneumatic (gas-loaded) memory are used with separating element, wherein the piston accumulators as a separating element serves a piston which separates a liquid space as a working space of a gas space as another working space within the storage housing of the piston accumulator. Nitrogen is regularly used as working gas and the gas-tight piston largely allows a decoupling of gas space to liquid space.

Der Flüssigkeitsteil steht mit dem Hydrokreislauf in Verbindung, so dass beim Anstieg des Druckes der Kolbenspeicher Flüssigkeit aufnimmt und das Gas dabei komprimiert wird. Bei sinkendem Druck dehnt sich das verdichtete Gas aus und verdrängt dabei die gespeicherte Druckflüssigkeit zurück in den Hydrokreislauf. Ein Vorteil von Kolbenspeichern ist, dass sie in jeder Lage "arbeiten" können, wobei jedoch eine senkrechte Anordnung mit der Gasseite nach oben vorzuziehen ist, damit ein Absetzen von Schmutzpartikeln aus der Flüssigkeit auf den Kolbendichtungen vermieden wird.The liquid part communicates with the hydraulic circuit, so that when the pressure rises, the piston accumulator receives liquid and the gas is compressed. With decreasing pressure, the compressed gas expands, displacing the stored pressure fluid back into the hydraulic circuit. One advantage of piston accumulators is that they can "work" in any position, but a vertical arrangement with the gas side upwards is preferable in order to avoid settling of dirt particles from the liquid on the piston seals.

Die wesentlichen Bestandteile eines Kolbenspeichers sind mithin als Speichergehäuse ein äußeres Zylinderrohr, der Kolben als Trennelement mit seinem Dichtungssystem sowie die stirnseitigen Verschlußdeckel, die als Deckelteile gleichzeitig auch einen Flüssigkeits- und Gasanschluß beinhalten. Dem Speichergehäuse kommen regelmäßig zwei Funktionen zu, nämlich einmal den inneren Druck zu bevorraten und zum anderen die Führung des Kolbens innerhalb des Speichergehäuses zu gewährleisten. Bei einer bekannten Lösung nach der JP 03 092679 A (SHOWA MFG Co. Ltd.) 17. April 1991 (1991-04-17) sind die stirnseitig das Innere des Speichergehäuses gegenüber der Umgebung abschließenden Deckelteile außenumfangsseitig mit einem Außengewinde versehen, das in ein korrespondierendes Innengewinde entlang des freien Längsrandes des Speichergehäuses über eine vorgebbare Wegstrecke einschraubbar ist. Das Herstellen der dahingehenden Gewindeverbindung ist zeitaufwendig, was die Herstellkosten für den Kolbenspeicher entsprechend verteuert. Des weiteren sind Sicherungsmaßnahmen vorzusehen, um das eingebrachte Deckelteil in seiner Lage im Speichergehäuse zu sichern.The essential components of a piston accumulator are therefore as an accumulator housing an outer cylinder tube, the piston as a separating element with its sealing system and the front-side cap, which at the same time include a liquid and gas connection as cover parts. The memory housing regularly two functions, namely once to stockpile the internal pressure and to ensure the other hand, the leadership of the piston within the storage enclosure. In a known solution according to the JP 03 092679 A (SHOWA MFG Co. Ltd.) April 17, 1991 (1991-04-17), the front side of the interior of the storage enclosure relative to the environment final lid parts are provided on the outer peripheral side with an external thread in a corresponding internal thread along the free longitudinal edge of the storage enclosure via a specifiable distance can be screwed. The preparation of the pertinent threaded connection is time consuming, which increases the cost of manufacturing the piston accumulator accordingly. Furthermore, safety measures must be taken to secure the inserted cover part in its position in the storage housing.

Durch die DE 42 05 199 A (SHOWA SEISAKUSHO GYODA KK) 10. September 1992 (1992-09-10) und Patent Abstracts of Japan Bd. 1999, Nr. 13, 30. November 1999 (1999-11-30 ) &; JP 11 230102 A (KAYABA IND Co. Ltd.), 27. August 1999 (1999-08-27) sind gattungsgemäße Verfahren zum Herstellen von Kolbenspeichern bekannt, mit einem Speichergehäuse und einem im Speichergehäuse längsverfahrbaren Trennkolben, der innerhalb des Speichergehäuses zwei Arbeitsräume voneinander trennt, das endseitig von jeweils einem Deckelteil verschlossen wird, wobei an der einen Seite des Deckelteils dieses über den freien Längsrand des Speichergehäuses festgelegt wird, der zu diesem Zweck eine Zustellbewegung auf das Deckelteil erfährt, wobei mindestens eines der beiden Deckelteile nach außen hin das Speichergehäuse abschließt und mit seiner der einen Seite gegenüberliegenden Seite gegen einen Anschlag im Inneren des Speichergehäuses in dieses eingesetzt wird und/oder dass das jeweilige Deckelteil durch die Klemmkraft des zugestellten freien Längsrandes in seiner Endlage gehalten wird. Die bekannten Lösungen sind kompliziert in der Herstellung und beinhalten an der Stelle des nach außen freiliegenden Deckelabschlusses die Gefahr von Beschädigungen am Deckelteil.By the DE 42 05 199 A (SHOWA SEISAKUSHO GYODA KK) September 10, 1992 (1992-09-10) and Patent Abstracts of Japan Vol. 1999, No. 13, November 30, 1999 (1999-11-30 ) &; JP 11 230102 A (KAYABA IND Co. Ltd.), August 27, 1999 (1999-08-27) generic methods for producing piston accumulators are known, with a storage housing and a storage housing longitudinally movable separating piston, which separates two working spaces within the storage housing from each other, the end is closed by a respective cover part, wherein on the one side of the cover part this is determined over the free longitudinal edge of the storage housing, which experiences a Zustellbewegung on the cover part for this purpose, wherein at least one of the two lid parts closes the memory housing outwards and with his the one side opposite side is used against a stop in the interior of the storage enclosure in this and / or that the respective cover part is held by the clamping force of the delivered free longitudinal edge in its end position. The known solutions are complicated to manufacture and involve at the location of the lid exposed to the outside the risk of damage to the lid part.

Ausgehend von diesem bekannten Stand der Technik stellt sich die Erfindung die Aufgabe die bekannten Herstellverfahren für Kolbenspeicher dahingehend weiter zu verbessern, dass mit geringem Herstellaufwand eine funktionssichere und lagesichere Verbindung eines Deckelteils im Speichergehäuse eines Kolbenspeichers gewährleistet ist und dass Beschädigungen am Deckelteil vermeidbar sind. Eine dahingehende Aufgabe löst ein Verfahren mit den Merkmalen des Patentanspruches 1 in seiner Gesamtheit.Based on this known prior art, the invention has the object to further improve the known manufacturing process for piston accumulator that with low manufacturing costs a functionally reliable and secure connection of a cover part in the storage housing of a piston accumulator is ensured and that damage to the cover part can be avoided. This object is achieved by a method having the features of claim 1 in its entirety.

Dadurch, dass gemäß dem kennzeichnenden Teil des Patentanspruches 1 an der einen Seite des Deckelteils dieses mit einer Anlagefläche in Form einer Festlegeschräge versehen wird, gegen die der entsprechend geneigte Längsrand sich im festgelegten Zustand abstützt und dass der freie Längsrand entlang seinem freien Ende bündig oder mit einem Überstand über die oben liegende eine Seite des Deckelteils geführt wird, wird unter Vermeidung der sonst üblichen Schraubverbindungslösung für das jeweilige Dekkelteil eine Art Klemmsitz am jeweils freien Ende des Speichergehäuses erreicht, bei der das Deckelteil zumindest über den freien Längsrand des Speichergehäuses nach dessen Zustellbewegung auf das Deckelteil festgeklemmt wird, wobei es aufgrund der korrespondierenden Neigung von Festlegeschräge und Längsrand genügt, wenn ein Teil des freien Längsrandes den dahingehenden Klemmsitz verwirklicht. Insbesondere braucht zum Herstellen der dahingehenden Verbindung das Umformwerkzeug nur über entsprechend zu der Festlegeschräge geneigte Zustellschrägen zu verfügen, um dergestalt mit geringem Herstellaufwand eine funktionssichere und lagesichere Verbindung herzustellen.Characterized in that according to the characterizing part of claim 1 on one side of the cover part of this is provided with a contact surface in the form of a Festgeschräge, against which the correspondingly inclined longitudinal edge is supported in the fixed state and that the free longitudinal edge is guided flush with its outer end or with a supernatant on the top one side of the lid part, while avoiding the usual Schraubverbindungslösung for the respective Dekkelteil a kind of clamping fit is achieved at each free end of the storage enclosure, wherein the cover part at least over the free Longitudinal edge of the storage housing is clamped after its feed movement to the lid part, wherein it is sufficient due to the corresponding inclination of Festleschräge and longitudinal edge when a part of the free longitudinal edge realizes the pertinent press fit. In particular, for the purpose of producing the pertinent connection, the forming tool only has to have feed bevels inclined correspondingly to the setting bevel in order to produce a functionally reliable and positionally reliable connection with little manufacturing effort.

Aufgrund des gegenüber dem Deckelteil überstehenden Längsrandes ist eine sichere Position des Deckelteils im Speichergehäuse erreicht und das Deckelteil ist vor schädigenden Krafteinleitungen geschützt.Due to the opposite to the lid part projecting longitudinal edge a secure position of the lid part is achieved in the storage housing and the lid part is protected from damaging force application.

Sofern ein Anschlag an der Innenseite des Speichergehäuses vorgesehen ist, kann bei der Zustellbewegung des freien Längsrandes des Speichergehäuses das Deckelteil gegen diesen Anschlag festgelegt werden. Zusätzlich oder alternativ besteht aber auch die Möglichkeit, das Deckelteil einfach am freien Ende des Speichergehäuses einzusetzen und dann die Zustellbewegung für den freien Längsrand des Speichergehäuses auszulösen. Die Zustellbewegung kann dabei gegen die Deckeloberseite erfolgen, sofern das Deckelteil in einer dahingehenden Lage gehalten wird; es wäre aber auch denkbar, eine freie Zustellbewegung für den Längsrand auszuführen, um dann anschließend im betriebsbereiten Zustand das Deckelteil über den im Speichergehäuse geführten Kolben gegen den freien Längsrand zu verfahren, der dann dergestalt die Klemmung hier vornimmt.If a stop is provided on the inside of the storage housing, the cover part can be set against this stop during the feed movement of the free longitudinal edge of the storage housing. Additionally or alternatively, however, it is also possible to simply insert the cover part at the free end of the storage housing and then trigger the delivery movement for the free longitudinal edge of the storage housing. The Zustellbewegung can take place against the top cover, if the cover part is held in a pertinent position; but it would also be conceivable, a free delivery movement for Run the longitudinal edge, then then to move in the ready state, the cover part on the run in the storage chamber piston against the free longitudinal edge, which then makes such a clamp here.

Vorzugsweise ist dabei weiter vorgesehen, dass für die Zustellbewegung des Längsrandes des Speichergehäuses ein Umformwerkzeug vorgesehen wird, das mit Zustellschrägen versehen den Längsrand des Speichergehäuses auf das Deckelteil derart legt, dass dieses in der Art des genannten Klemmsitzes im Speichergehäuse festgelegt wird.Preferably, it is further provided that for the feed movement of the longitudinal edge of the storage housing, a forming tool is provided which provided with Zustellschrägen the longitudinal edge of the storage housing on the cover part such that this is determined in the manner of said clamping fit in the storage enclosure.

Bei einer besonders vorteilhaften Ausgestaltung des erfindungsgemäßen Verfahrens nehmen in einer gemeinsamen Zustellbewegung auf das Speichergehäuse zwei Umformwerkzeuge an gegenüberliegenden Seiten den Festlegevorgang für das jeweilige endseitige Deckelteil vor, indem diese auf den jeweils freien Längsrand des Speichergehäuses einwirken. Es hat sich für das Erzeugen hoher Festlegekräfte als sehr vorteilhaft erwiesen, beide freien Enden des zylindrischen Speichergehäuses gleichermaßen zuzustellen, wobei das an einem Ende des Speichergehäuses wirkende Umformwerkzeug sicher die Kräfte mit abstützen kann, die von der anderen Seite her beim Umformvorgang mit dem anderen Umformwerkzeug in das Speichergehäuse eingeleitet werden.In a particularly advantageous embodiment of the method according to the invention take in a common feed movement to the storage housing two forming tools on opposite sides before the fixing process for the respective end cover part by acting on the respective free longitudinal edge of the storage enclosure. It has proven to be very advantageous for the generation of high locking forces to deliver both free ends of the cylindrical storage enclosure alike, said acting at one end of the storage enclosure forming tool can safely support the forces from the other side during the forming process with the other forming tool be introduced into the storage enclosure.

Weitere vorteilhafte Ausführungsformen sind Gegenstand der sonstigen Unteransprüche.Further advantageous embodiments are the subject of the other dependent claims.

Im folgenden wird das erfindungsgemäße Verfahren anhand der Zeichnung näher erläutert. Dabei zeigen in prinzipieller und nicht maßstäblicher Darstellung die

Fig.1
einen Längsschnitt durch einen Kolbenspeicher nach dem Stand der Technik;
Fig.2
im Längsschnitt den oberen Teil einer ersten Ausführungsform eines Kolbenspeichergehäuses mit darüberliegendem Umformwerkzeug;
Fig.3 und 4
im Längsschnitt das Aufsetzen eines Montagewerkzeuges auf das freie Ende des Speichergehäuses zwecks Festlegen des jeweiligen Deckelteils;
Fig.5 und 6
im Längsschnitt den oberen Bereich des Speichergehäuses in zwei verschiedenen Varianten mit innen liegenden Einführschrägen zum Einführen des jeweiligen Deckelteils.
In the following the method according to the invention will be explained in more detail with reference to the drawing. This show in principle and not to scale representation of the
Fig.1
a longitudinal section through a piston accumulator according to the prior art;
Fig.2
in longitudinal section the upper part of a first embodiment of a piston accumulator housing with overlying forming tool;
3 and 4
in longitudinal section, the placement of an assembly tool on the free end of the storage enclosure in order to set the respective cover part;
Fig.5 and 6
in longitudinal section the upper portion of the storage enclosure in two different variants with internal insertion bevels for insertion of the respective cover part.

Der in Fig.1 gezeigte, zum Stand der Technik zählende Kolbenspeicher weist als Speichergehäuse 10 ein äußeres Zylinderrohr auf, in dem als Trennelement ein Kolben 12 mit seinem außenumfangsseitigen Dichtsystem 14 längsverfahrbar geführt ist. Der Kolben 12 trennt innerhalb des Speichergehäuses 10 zwei Arbeitsräume 16,18 voneinander ab, wobei der eine Arbeitsraum 16 der Aufnahme eines Arbeitsgases, insbesondere in Form von Stickstoff, dient und der weitere zweite Arbeitsraum 18 bildet den sog.The piston accumulator, which is shown in FIG. 1 and belongs to the prior art, has as an accumulator housing 10 an outer cylinder tube in which a piston 12 with its outer peripheral sealing system 14 can be moved longitudinally as a separating element. The piston 12 separates within the storage housing 10, two working spaces 16,18 from each other, wherein the one working space 16 of the inclusion of a working gas, in particular in the form of nitrogen, is used and the other second working space 18 forms the so-called.

Flüssigkeitsraum für den Kolbenspeicher aus. In Abhängigkeit der Betriebssituation des Speichers variieren die Verfahrstellung des Kolbens 12 und mithin die Volumenanteile an Gas und Fluid in den Arbeitsräumen 16 bzw. 18. Am stirnseitigen Ende des Speichergehäuses 10 ist jeweils ein Deckelteil 20,22 angeordnet mit einem Gasanschluß 24 zum Nachfüllen des Stickstoffarbeitsgases und mit einem Flüssigkeitsanschluß 26 zum Anschließen des Kolbenspeichers an ein nicht näher dargestelltes Hydro-Gesamtanlagensystem.Fluid space for the piston accumulator off. Depending on the operating situation of the memory, the displacement position of the piston 12 and consequently the volume proportions of gas and fluid in the work spaces 16 and 18 vary. At the front end of the storage housing 10, a cover part 20, 22 is arranged with a gas connection 24 for replenishing the nitrogen working gas and with a fluid port 26 for connecting the piston accumulator to a not-shown hydro overall system.

Die beiden Deckelteile 20,22 sind jeweils mit einem Außengewinde 28 versehen, das in Eingriff bringbar ist mit einem Innengewinde 30, das entlang dem freien Längsrand 32 verlaufend angeordnet ist und nach außen hin ins Freie mündet. Außenumfangsseitig ist das jeweilige Deckelteil 20,22 mit einer Dichtung 34 versehen zum Abdichten des Inneren des Speichergehäuses 10 von der Umgebung. Das Anbringen der Gewindestrecken 28,30 ist mit einem gewissen Herstellaufwand verbunden, was die bekannten Kolbenspeicher aufwendig und teuer in der Herstellung werden läßt. Auch ist zusätzlich eine Verdrehsicherung für das jeweilige Deckelteil 20,22 notwendig, um seine Lagefixierung innerhalb des Speichergehäuses 10 sicherzustellen. Eine mögliche Verdrehsicherung für das jeweilige Dekkelteil 20,22 kann darin bestehen, dass man entlang der Gewinde 28,30 eine übliche Klebstoffsicherung vorsieht oder der Deckelteil wird mit einer üblichen Haltebohrung (mit und ohne Gewinde) in seiner Lage gehalten.The two cover parts 20,22 are each provided with an external thread 28 which is engageable with an internal thread 30 which is arranged to extend along the free longitudinal edge 32 and opens outwards into the open. On the outer circumference, the respective cover part 20, 22 is provided with a seal 34 for sealing the interior of the storage housing 10 from the surroundings. The attachment of the threaded sections 28,30 is associated with a certain manufacturing effort, which can be costly and expensive to manufacture the known piston accumulator. In addition, an anti-twist device for the respective cover part 20, 22 is necessary in order to ensure its positional fixation within the storage housing 10. A possible anti-rotation for the respective Dekkelteil 20,22 may consist in that along the threads 28,30 provides a conventional adhesive assurance or the cover part is held with a conventional retaining hole (with and without thread) in position.

Ausgehend von dieser bekannten Lösung wird nunmehr anhand der Fig.2ff das erfindungsgemäße Verfahren näher vorgestellt, das in kostengünstiger Weise eine funktionssichere Verbindung von Deckelteil mit dem zugehörigen Speichergehäuse 10 erlaubt. Der einfacheren Darstellung wegen wurde demgemäß in der Fig.2 nur das obere Ende des Speichergehäuses 10 dargestellt zusammen mit dem oberen Deckelteil 20. Sofern im folgenden dieselben Bauteile angesprochen sind wie bei der bekannten Ausführungsform nach der Fig.1, werden die dahingehenden Bauteile mit denselben Bezugszeichen wie in der Fig.1 wiedergegeben bezeichnet.Based on this known solution, the method according to the invention will now be described in more detail with reference to Fig.2ff, which allows a functionally reliable connection of the cover part with the associated memory housing 10 in a cost effective manner. For the sake of simplicity, only the upper end of the storage enclosure 10 has been shown in FIG together with the upper cover part 20. Unless the following components are addressed as in the known embodiment of Figure 1, the pertinent components are denoted by the same reference numerals as in the Fig.1 reproduced.

Das erfindungsgemäße Verfahren ist unter anderem dadurch charakterisiert, dass das jeweilige Deckelteil, hier das Deckelteil 20, mit seiner einen unteren Seite 36 gegen einen Anschlag 38 in Form einer Ringfläche im Inneren des Speichergehäuses 10 in dieses eingesetzt wird, wobei an der gegenüberliegenden Seite 40 des Deckelteils 20 dieses über den freien Längsrand 32 des Speichergehäuses 10 festgelegt wird, wobei zu diesem Zweck der Längsrand 32 eine Zustellbewegung auf das Deckelteil 20 erfährt, was im folgenden noch näher erläutert werden wird.The inventive method is characterized, inter alia, that the respective cover part, here the cover part 20, with its one lower side 36 against a stop 38 in the form of an annular surface in the interior of the storage enclosure 10 is inserted into this, wherein on the opposite side 40 of Lid portion 20 of this is determined over the free longitudinal edge 32 of the storage enclosure 10, for which purpose the longitudinal edge 32 undergoes a feed movement to the cover part 20, which will be explained in more detail below.

Für die Zustellung des Längsrandes 32 des Speichergehäuses 10 dient ein Umformwerkzeug 42, das mit mindestens einer Zustellschräge 44 versehen ist, welche den Längsrand 32 derart auf das Deckelteil 20 legt, dass dieses in der Art eines Klemmsitzes im Speichergehäuse 10 zwischen dem Anschlag 38 und dem Längsrand 32 festgelegt ist. Zum Erstellen des dahingehenden Klemmsitzes ist die obere Seite 40 des Deckelteils 20 mit einer Anlagefläche 46 versehen, die konisch zur Längsachse 48 des Speichergehäuses 10 verlaufend angeordnet ist. Die Neigung der dahingehenden Anlagefläche 46 entspricht der Neigung der Zustellschräge 44 des Umformwerkzeuges 42; es sind hier aber auch andere sinnfällige Neigungen bzw. Schrägen denkbar. Wie die Darstellung nach der Fig.2 zeigt, ist die Zustellrichtung für das Umformwerkzeug 42 die Längsachse 48 des Speichergehäuses 10 bzw. des gesamten Kolbenspeichers.For the delivery of the longitudinal edge 32 of the storage enclosure 10 is a forming tool 42 which is provided with at least one feed bevel 44, which sets the longitudinal edge 32 on the lid member 20 that this in the manner of a clamping fit in the storage housing 10 between the stop 38 and the Longitudinal edge 32 is fixed. To create the pertinent clamping seat, the upper side 40 of the cover part 20 is provided with a contact surface 46, which is arranged conically to the longitudinal axis 48 of the storage housing 10 extending. The inclination of the pertinent contact surface 46 corresponds to the inclination of the feed bevel 44 of the forming tool 42; but here are also other obvious inclinations or slopes conceivable. As the illustration in FIG. 2 shows, the feed direction for the forming tool 42 is the longitudinal axis 48 of the storage housing 10 or of the entire piston accumulator.

Der besseren Darstellung wegen wurde in der Fig.2 das Trennelement in Form des Kolbens 12 weggelassen ebenso wie der in Fig.1 dargestellte Gasanschluß 24, der auch hier integraler Bestandteil des oberen Deckelteils 20 ist. Bevor die Klemmverbindung über das Umformwerkzeug 42 hergestellt wird, weist das obere freie Ende des Speichergehäuses mit seinem oberen Längsrand 32 eine Kontur auf gemäß einer der Darstellungen nach den Fig.3 bis 6. Dabei ist der Längsrand 32 gegenüber dem sonstigen Speichergehäuse 10 in der Wandstärke reduziert, wobei die Übergangsstelle zwischen den verschiedenen Wandstärken den Anschlag 38 für das Deckelteil 20 bildet. Des weiteren wird der Längsrand 32 vorzugsweise auf seiner dem Deckelteil 20 zugewandten Seite und nach außen hin orientiert mit einer konischen Einführschräge 50 versehen. Die dahingehende Einführschräge 50 erleichtert das Einführen des Deckelteils 20 in das freie obere Ende des Speichergehäuses 10, was im folgenden noch näher erläutert werden wird.For the sake of better illustration, the separating element in the form of the piston 12 has been omitted in FIG. 2, just like the gas connection 24 shown in FIG. 1, which is also an integral part of the upper cover part 20 here. Before the clamping connection is made via the forming tool 42, the upper free end of the storage housing with its upper longitudinal edge 32 has a contour according to one of the representations according to Figures 3 to 6. Here, the longitudinal edge 32 relative to the other memory housing 10 in the wall thickness reduced, wherein the transition point between the different wall thicknesses forms the stop 38 for the cover part 20. Furthermore, the longitudinal edge 32 is preferably provided on its side facing the cover part 20 and outwardly oriented with a conical insertion bevel 50. The pertinent insertion bevel 50 facilitates the insertion of the cover part 20 in the free upper end of the storage housing 10, which will be explained in more detail below.

Des weiteren kann der freie Längsrand 32, was insbesondere die Darstellung nach den Fig.4 und 5 zeigt, außenumfangsseitig und zum freien Ende des Speichergehäuses 10 hin orientiert mit einer Gleitschräge 52 versehen sein, was es dem Längsrand 32 erleichtert, aus seiner zylindrischen Form gemäß den Darstellungen nach den Fig.3 bis 6 in eine zugestellte geneigte Stellung überzugehen, wobei die Gleitschräge 52 dann entlang der Zustellschräge 44 des Umformwerkzeuges 42 abgleitet, sofern dieses in Zustellrichtung auf das Speichergehäuse 10 zusehends aufgesetzt wird. Ist die Zustellbewegung mit dem Umformwerkzeug 42 abgeschlossen, ist der Längsrand 32 auf das Deckelteil 20 entlang seiner Anlagefläche 46 in der Art einer Festlegeschräge ausgebildet geneigt und hält dergestalt das Deckelteil 20 gegen den Anschlag 38 im Inneren des Speichergehäuses 10 fest.Furthermore, the free longitudinal edge 32, which in particular the illustration of Figures 4 and 5 shows the outside circumference and the free end of the storage enclosure 10 oriented towards be provided with a sliding bevel 52, which facilitates the longitudinal edge 32, according to its cylindrical shape the views according to Figures 3 to 6 in an zugegeben inclined position, wherein the sliding bevel 52 then slides along the feed slope 44 of the forming tool 42, provided that it is increasingly placed on the storage housing 10 in the feed direction. If the feed movement is completed with the forming tool 42, the longitudinal edge 32 is inclined to the cover part 20 along its contact surface 46 in the manner of a Festleschräge and thus holding the lid member 20 against the stop 38 in the interior of the storage enclosure 10 fixed.

Um die sichere Position des Deckelteils 20 im Speichergehäuse 10 nicht zu gefährden und um auch das Deckelteil 20 vor schädigenden Krafteinleitungen zu schützen, ist, wie dies die Darstellung nach der Fig.2 zeigt, der freie Längsrand 32 entlang seinem freien Ende mit einem Überstand über die oben liegende zweite Seite 40 des Deckelteils 20 geführt. Nach Festlegen der dahingehenden Klemmverbindung wird das Umformwerkzeug 42 vom Speichergehäuse 10 wieder wegbewegt und nimmt dann beispielsweise seine in der Fig.2 gezeigte obere Stellung ein. Vorzugsweise erfolgt der Umformvorgang für den jeweiligen Längsrand 32 des Speichergehäuses 10 kalt; es ist aber auch ein Warmumformen denkbar mit entsprechender Erwärmung des Speichergehäusematerials sowie vorzugsweise des Umformwerkzeuges 42 selbst. Als Werkstoff für das Speichergehäuse 10 mit seinem Längsrand 32 kommt ein üblicher, gut formbarer Stahlwerkstoff zum Einsatz. Um die Klemmkräfte optimal in das Deckelteil 20 einzuleiten und um auch randseitig für das Deckelteil 20 eine gute Abstützung im Speichergehäuse 10 zu gewährleisten, ist vorgesehen, dass die Höhe des Deckelteils 20 jeweils an die durch den Betrieb des Speichers vorgegebenen Einsatzbedingungen angepaßt ist. Im gezeigten Fall ist das Deckelteil 20 mindestens doppelt so groß ist wie die Länge des Längsrandes 32 zwischen seinem freien Ende und einer Umlenkstelle 54, ab der der Längsrand 32 auf die Deckeloberseite aufgelegt ist.In order not to jeopardize the secure position of the cover part 20 in the storage housing 10 and also to protect the cover part 20 from damaging force discharges, as shown in the illustration of Figure 2, the free longitudinal edge 32 along its free end with a supernatant over the overhead second side 40 of the cover part 20 is guided. After determining the pertinent clamping connection, the forming tool 42 is moved away from the storage housing 10 again and then takes, for example, its upper position shown in Figure 2 a. Preferably, the forming process for the respective longitudinal edge 32 of the storage housing 10 is cold; but it is also a hot forming conceivable with appropriate heating of the storage housing material and preferably the forming tool 42 itself. As a material for the storage housing 10 with its longitudinal edge 32 is a conventional, good moldable steel material used. In order to optimally initiate the clamping forces in the cover part 20 and also to ensure a good support in the storage housing 10 at the edge for the cover part 20, it is provided that the height of the cover part 20 is adapted in each case to the predetermined by the operation of the storage conditions. In the case shown, the cover part 20 is at least twice as large as the length of the longitudinal edge 32 between its free end and a deflection point 54, from which the longitudinal edge 32 is placed on the lid top.

Bei einer besonders bevorzugten Ausgestaltung (nicht dargestellt) des erfindungsgemäßen Verfahrens wird in einer gemeinsamen Zustellbewegung zweier Umformwerkzeuge 42 an gegenüberliegenden Seiten des Speichergehäuses 10 der Festlegevorgang für das jeweilige endseitige Deckelteil 20,22 zeitgleich und gemeinsam mit im wesentlichen gleichen Umformkräften durch Einwirkung auf den jeweils freien Längsrand 32 des Speichergehäuses 10 vorgenommen. Es hat sich gezeigt, dass bei der dahingehenden Umformlösung das jeweils gegenüberliegende Umformwerkzeug gleichzeitig beim Umformen die Kräfte des anderen Umformwerkzeuges mit aufnehmen kann, wie sie während des Umformvorganges auftreten. Bei der dahingehenden Ausgestaltung kann auf aufwendige Abstützvorrichtungen auf den jeweils gegenüberliegenden Seiten, wo das Umformwerkzeug 42 nicht einwirkt, eingespart werden. Auch kommt es dergestalt zu einer harmonischen Krafteinleitung in das Speichergehäuse 10 ohne Auftreten von schädigenden Kraftspitzen.In a particularly preferred embodiment (not shown) of the method according to the invention is in a common feed movement two forming tools 42 on opposite sides of the storage housing 10 of the fixing process for the respective end-side cover part 20,22 made simultaneously and together with substantially the same forming forces by acting on the respective free longitudinal edge 32 of the storage enclosure 10. It has been found that in the pertinent forming solution, the respective opposite forming tool can simultaneously absorb the forces of the other forming tool during forming, as they occur during the forming process. In the pertinent embodiment can be saved on elaborate supporting devices on the respective opposite sides, where the forming tool 42 does not act. Also, such a harmonic introduction of force into the storage housing 10 occurs without the occurrence of damaging force peaks.

Wie die Fig.3 und 4 zeigen, kann mittels eines Aufsetzwerkzeuges 56, das gemäß der Darstellung nach der Fig.4 den freien Längsrand 32 des Speichergehäuses 10 umfaßt, das jeweilige Deckelteil 20,22 in das Speichergehäuse 10 bis zum Anschlag 38 in Form der Ringfläche eingebracht werden. Für den dahingehenden Einführvorgang weist das Aufsetzwerkzeug 56 eine Zuführschräge 58 auf, entlang der außenumfangsseitig das Deckelteil 20,22 abgleiten kann. Durch den Einsatz des Montagewerkzeuges 56 ist erreicht, dass eine mögliche Dichtungsbeschädigung der Dichtung 34 des jeweiligen Deckelteils 20,22 mit Sicherheit vermieden ist. Neben der Zuführschräge 58 weist das Aufsetzwerkzeug 56 einen Aufnahmeraum 60 auf, in den das obere Ende des Speichergehäuses 10 aufnehmbar ist, so dass die Zuführschräge 58 bündig mit der Oberkante des Längsrandes 32 abschließt und im übrigen kontinuierlich in den Aufnahmebereich 62 für das eigentliche Deckelteil 20,22 im Speichergehäuse 10 übergeht.As shown in Figures 3 and 4, by means of a Aufsetzwerkzeuges 56, which according to the illustration of Figure 4, the free longitudinal edge 32 of the storage enclosure 10, the respective cover part 20,22 into the storage enclosure 10 to the stop 38 in the form of Ring surface are introduced. For the pertinent insertion process, the Aufsetzwerkzeug 56 has a Zuführschräge 58, along the outer peripheral side, the cover part 20,22 can slide off. Through the use of the assembly tool 56 it is achieved that a possible seal damage of the seal 34 of the respective cover part 20,22 is avoided with certainty. In addition to the Zuführschräge 58, the Aufsetzwerkzeug 56 has a receiving space 60, in which the upper end of the storage enclosure 10 is receivable, so that the Zuführschräge 58 flush with the upper edge of the longitudinal edge 32 and the rest continuously in the receiving area 62 for the actual cover part 20th , 22 in the memory housing 10 passes.

Bei den Ausführungsformen nach den Fig.5 und 6 ist das Speichergehäuse 10 entlang seines oberen Längsrandes 32 innenumfangsseitig und nach außen hin sich erweiternd mit der Einführschräge 50 versehen, was eine Art verkürzte Schlupfkante ergibt, über die sich dergestalt das jeweilige Deckelteil 20,22 gleichfalls einführen und später dann festlegen läßt. Die dahingehende Variante kann gewählt werden, sofern die Deckeldichtung 34 sich als robust erweist und für Beschädigungen nicht allzu anfällig sein sollte.In the embodiments according to Figures 5 and 6, the storage housing 10 along its upper longitudinal edge 32 on the inner peripheral side and outwardly expanding with the insertion 50, which results in a kind of shortened slip edge over which the respective cover part 20,22 in the same way introduce and then set later. The pertinent variant can be chosen if the lid seal 34 proves to be robust and should not be too vulnerable to damage.

Mit der genannten Umformtechnik bezogen auf die freien Längsränder 32 des Speichergehäuses 10 lassen sich mithin Deckelteile 20,22 in den verschiedensten Ausführungen paßgenau und sicher sowie druckdicht in den Speichergehäusen 10 festlegen und auf kostenintensiv anzubringende Schraubverbindungen an dieser Stelle, die zusätzlich noch zu sichern sind, kann vollständig verzichtet werden.With the aforementioned forming technique based on the free longitudinal edges 32 of the storage housing 10 can thus cover parts 20,22 in the most diverse Designs fit accurately and safely and pressure-tight in the storage enclosures 10 and on expensive to install screw at this point, which are additionally secure, can be completely dispensed with.

Claims (8)

  1. Method for producing piston stores with a storage housing (10) and a longitudinally displaceable separating piston (12) within the storage housing (10), the same separating two working chambers (16, 18) within the storage housing (10), which is closed by means of a lid component (20, 22) at each end side, whereby the lid component (20, 22) is fitted via the free longitudinal edge (32) of the storage housing (10) on one side (40) of the same, which is subjected to an insertion movement in the direction of the lid component (20, 22) for this purpose, whereby at least one of the two lid components (20, 22) closes the storage housing (10) off against the outside and is inserted into the same with the side (36) opposite the side (40) against a shoulder (38) within the storage housing (10) and/or in that the relevant lid component (20, 22) is held in its final position by means of the clamping force of the inserted free longitudinal edge (32), characterised in that the lid component (20, 22) is equipped with an abutment surface (46) in the form of a fitting slope on one side (40) of the same, against which the relevant inclined longitudinal edge (32) is supported in its fitted condition, and in that the free longitudinal edge (32) finishes flush or with a projection over the upper second side (40) of the lid component (20) along its free end.
  2. Method according to Claim 1, characterised in that a forming tool (42) is envisaged for the insertion movement of the longitudinal edge (32) of the storage housing (10), the same positioning the longitudinal edge (32) equipped with at least one insertion slope (44) to the lid component (20) in such a way that the same is fitted within the storage housing (10) in the way of a clamping fitting.
  3. Method according to Claim 1 or 2, characterised in that the wall thickness of the longitudinal edge (32) is reduced in comparison with the rest of the storage housing (10), and in that the transition point between the different wall thicknesses forms the shoulder (38) for the lid component (20) within the storage housing (10).
  4. Method according to one of the Claims 1 to 3, characterised in that the longitudinal edge (32) is equipped with an insertion slope (50) facing towards the outside on the side of the same facing the relevant lid component (20, 22).
  5. Method according to one of the Claims 2 to 4, characterised in that two forming tools (42) carry out the fitting process for the relevant end side lid component (20, 22) on opposite sides of the storage housing (10) during a joint insertion movement under the influence of the relevant free longitudinal edge (32) of the storage housing (10).
  6. Method according to one of the Claims 1 to 5, characterised in that the lid component (20, 22) is inserted into the storage housing (10) up to the shoulder (38) by means of a positioning tool (56) enclosing the free longitudinal edge (32) of the storage housing (10) via an insertion slope (58).
  7. Method according to one of the Claims 1 to 6, characterised in that the inner circumference of the longitudinal edge (32) is equipped with an insertion slope (50) for the lid component (20, 22) that widens towards the outside.
  8. Method according to one of the Claims 1 to 7, characterised in that the height of the lid component (20, 22) is selected to be at least twice as high as the free longitudinal edge (38) of the storage housing (10) used for clamping the lid component (20, 22).
EP04702305A 2003-02-01 2004-01-15 Method for the production of piston-type accumulators Expired - Lifetime EP1588056B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07007946A EP1808605B1 (en) 2003-02-01 2004-01-15 Method for manufacturing piston-type accumulators

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10303988A DE10303988A1 (en) 2003-02-01 2003-02-01 Method of manufacturing piston accumulators
DE10303988 2003-02-01
PCT/EP2004/000230 WO2004067968A1 (en) 2003-02-01 2004-01-15 Method for the production of piston-type accumulators

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP07007946A Division EP1808605B1 (en) 2003-02-01 2004-01-15 Method for manufacturing piston-type accumulators

Publications (2)

Publication Number Publication Date
EP1588056A1 EP1588056A1 (en) 2005-10-26
EP1588056B1 true EP1588056B1 (en) 2007-06-27

Family

ID=32730673

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04702305A Expired - Lifetime EP1588056B1 (en) 2003-02-01 2004-01-15 Method for the production of piston-type accumulators
EP07007946A Expired - Lifetime EP1808605B1 (en) 2003-02-01 2004-01-15 Method for manufacturing piston-type accumulators

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP07007946A Expired - Lifetime EP1808605B1 (en) 2003-02-01 2004-01-15 Method for manufacturing piston-type accumulators

Country Status (6)

Country Link
US (1) US8387253B2 (en)
EP (2) EP1588056B1 (en)
JP (1) JP2006516706A (en)
AT (2) ATE365870T1 (en)
DE (3) DE10303988A1 (en)
WO (1) WO2004067968A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004043352A1 (en) * 2004-09-08 2006-03-23 Hydac Technology Gmbh hydraulic accumulator
GB2420380A (en) * 2004-11-18 2006-05-24 Parker Hannifin Plc Twin piston gas filled hydraulic actuator
DE102009021463A1 (en) * 2009-05-15 2010-11-18 Hydac Technology Gmbh hydraulic accumulator
DE102015014797A1 (en) * 2015-11-14 2017-05-18 Hydac Technology Gmbh safety device

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Publication number Priority date Publication date Assignee Title
US2734531A (en) * 1956-02-14 Hydraulic accumulators
US2748801A (en) * 1953-10-22 1956-06-05 Tommy J Mccuistion Accumulators
US3408731A (en) * 1966-04-25 1968-11-05 Mercier Jean Method of retaining cover member on pressure vessel
US3541833A (en) * 1966-04-25 1970-11-24 Jean Mercier Apparatus for forming pressure vessel ends
DE2238211A1 (en) * 1972-08-03 1974-02-14 Haenchen Kg Herbert PRESSURIZED CYLINDRICAL CONTAINER
DE3411592C2 (en) * 1984-03-29 1994-06-30 Hydac Technology Gmbh Hydropneumatic accumulator
US4848448A (en) * 1987-12-28 1989-07-18 Mccord Heat Transfer Corporation Heat exchange assembly
JPH03101U (en) * 1989-05-23 1991-01-07
JPH0392679A (en) * 1989-09-05 1991-04-17 Showa Mfg Co Ltd Manufacture of pressure vessel
US5115663A (en) * 1989-11-25 1992-05-26 Honda Giken Kogyo Kabushiki Kaisha Method for forming a crankshaft
JP2531945Y2 (en) * 1991-02-20 1997-04-09 株式会社ショーワ Accumulator structure
US5311910A (en) * 1991-02-20 1994-05-17 Kabushiki Kaisha Showa Seisakusho Cap attachment structure for accumulator
JPH08159102A (en) * 1994-12-05 1996-06-18 Nok Corp Accumulator
JP3712321B2 (en) * 1998-02-12 2005-11-02 カヤバ工業株式会社 accumulator
JP2000071134A (en) * 1998-08-27 2000-03-07 Nissan Diesel Motor Co Ltd Piston inserting device in engine assembling work
EP1128073A1 (en) * 2000-02-28 2001-08-29 Serta Method of closing the end which forms the head or rod guide of the barrel of an actuator cylinder
IT1318123B1 (en) * 2000-07-05 2003-07-23 Alfamatic S R L PNEUMATIC, HYDRAULIC AND SIMILAR CYLINDER, AND METHOD FOR CUSTOMIZATION
JP4342091B2 (en) * 2000-08-03 2009-10-14 本田技研工業株式会社 Piston insertion jig
US6460571B1 (en) * 2001-03-13 2002-10-08 Parker-Hannifin Corporation Crimped piston/membrane accumulator
DE10139192A1 (en) * 2001-08-16 2003-03-06 Hydac Technology Gmbh piston accumulators
DE10313241A1 (en) 2003-03-25 2004-10-21 Hydac Technology Gmbh piston accumulators

Also Published As

Publication number Publication date
DE10303988A1 (en) 2004-08-19
EP1808605B1 (en) 2009-04-15
US20060016074A1 (en) 2006-01-26
EP1808605A1 (en) 2007-07-18
ATE428861T1 (en) 2009-05-15
DE502004004183D1 (en) 2007-08-09
ATE365870T1 (en) 2007-07-15
DE502004009375D1 (en) 2009-05-28
JP2006516706A (en) 2006-07-06
WO2004067968A1 (en) 2004-08-12
US8387253B2 (en) 2013-03-05
EP1588056A1 (en) 2005-10-26

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