EP1462191B1 - Hydroforming device - Google Patents
Hydroforming device Download PDFInfo
- Publication number
- EP1462191B1 EP1462191B1 EP04006919A EP04006919A EP1462191B1 EP 1462191 B1 EP1462191 B1 EP 1462191B1 EP 04006919 A EP04006919 A EP 04006919A EP 04006919 A EP04006919 A EP 04006919A EP 1462191 B1 EP1462191 B1 EP 1462191B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- tool
- recess
- fluid
- platen
- 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
Links
- 239000012530 fluid Substances 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 3
- 230000002706 hydrostatic effect Effects 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 4
- 230000000284 resting effect Effects 0.000 claims description 2
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- ZINJLDJMHCUBIP-UHFFFAOYSA-N ethametsulfuron-methyl Chemical compound CCOC1=NC(NC)=NC(NC(=O)NS(=O)(=O)C=2C(=CC=CC=2)C(=O)OC)=N1 ZINJLDJMHCUBIP-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/021—Deforming sheet bodies
- B21D26/031—Mould construction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/003—Simultaneous forming, e.g. making more than one part per stroke
Definitions
- the invention relates to a device for high-pressure forming with a tool which is divided along a parting plane into two tool halves, wherein the two tool halves form a loadable with a hydrostatic internal pressure for shaping a workpiece to be formed mold chamber, and with a tool carrier, for each mold half at least having one of these mold half associated tool carrier component.
- the high-pressure forming which can be designed as internal or external high-pressure forming, is used for forming workpieces by subjecting the workpieces by hydrostatic pressure.
- the workpiece to be machined is surrounded by a tool that is divided along a parting plane into two mold halves, wherein this tool is shaping.
- the tool has at least one fluid supply line for acting on the workpiece with a hydrostatic pressure, which leads to the deformation of the workpiece.
- each tool half is therefore associated with a tool carrier component which receives this tool half.
- the forces transmitted to the tool halves by the tool carrier components are greater than the forces resulting from the hydrostatic pressure in the tool.
- the required locking forces to be applied by the tool halves can be so great that elastic deformations occur in the tool halves.
- a uniform surface pressure are no longer given. If the tool is deformed too much, additional fluid used for forming can escape and the forming process can be hindered or interrupted.
- the invention has for its object to provide a device of the type mentioned, which reliably prevents mutually deformations in the tool halves while maintaining a uniform and tight conditioning of the tool halves.
- each tool carrier component is formed from a mounting plate, at least one piston standing on this mounting plate and an approximately parallel to the mounting plate aligned piston receiving plate, wherein the piston receiving plate for the piston has a recess whose diameter is slightly larger than that
- Each tool carrier component of the device according to the invention is formed from a plurality of components which come into operative connection with one another.
- the intended mounting plate forms a base support on which at least one, but preferably a plurality of separate pistons stand up.
- the mounting plate facing away from the ends of the piston or is a piston in the other plate, namely in the piston receiving plate before.
- the piston receiving plate is for each piston a recess arranged, in each of which a piston can protrude.
- Well walls and piston wall surrounded in projecting the piston into the recess a cavity which can be filled with a fluid.
- connection is rather elastic, so that the components of the tool carrier components can deform against each other.
- the locking force for locking the tool halves is applied by the tool carrier components.
- the tool carrier components are in each case arranged between a tool half and a contact element applied from the outside to the tool carrier component.
- the application of the force is carried out by introducing a fluid into the cavities, whereby the pistons from the wells are partiallyhumanlite.
- the distance between the piston receiving plate and the mounting plate is increased by the moving out of the pistons from the wells.
- the tool carrier component is firmly clamped between the tool and the outer bearing element and brings the clamping force for the tool.
- the mounting plate of the tool half is facing.
- the mounting plate can be attached directly to the tool half. But it is also possible that the piston receiving plate is attached directly to the mold half, then the mounting plate of the tool half is turned away.
- the tool half of the component facing the tool carrier component and the tool half can also be integrally formed.
- a piston with a large diameter is used.
- a plurality of approximately evenly distributed over the extension of the mounting plate pistons are used, which distributed over the mounting plate can muster the forces.
- a development of the invention provides that in the side wall of each recess a seal is inserted, to which the piston rests with its side wall. Through the seal, a seal of the cavity is achieved, which prevents fluid from leaking from the cavity past the piston to the outside.
- the seal is preferably designed as a circumferential sealing ring.
- At least one fluid line opens into the cavity in the recess.
- the piston is pushed out of the cavity, this then presses on the Kolbenaufstellplatte.
- a force is generated with the fluid which can be transferred to the tool when the tool carrier component is applied to a contact element.
- the pistons stand loose on the mounting plate.
- the mounting plate preferably has a hardened surface for this purpose.
- the separate from each other and also separate from the mounting plate and piston receiving plate piston can be handled individually, in particular they can be individually supplied to a surface finishing.
- Developments of the invention provide that the surface of the piston is hardened and / or chrome-plated.
- the pistons can be polished in addition to the hardening and chrome plating, so that they have flat surfaces.
- the chrome plating also serves to protect the pistons against environmental influences, it leads to a reduction of the frictional forces and reduces the wear of the seals.
- a cavity with a fluid is to be arranged only on one side of the piston. On the other side, the pistons stand on the mounting plate.
- the separate design of the piston allows in addition to their separate production, the cheaper production of the tool carrier component as a whole.
- the apparatus for hydroforming in Fig. 1 comprises a tool 1, which is composed of two approximately cuboid tool halves 2, 3.
- the two tool halves 2, 3 rest on each other, they form a mold chamber 4.
- a workpiece can be machined with a hydrostatic pressure.
- Each tool half 2, 3 is associated with a tool carrier component 5, 6.
- the tool carrier component 5 is placed on the tool 2, while the tools 3, 2 and the tool carrier component 5 are placed on the overall tool carrier component 6.
- each tool carrier component is formed from a mounting plate 9, 9 ', pistons 10, 10' resting on this mounting plate 9, 9 'and a piston receiving plate 11, 11'.
- the mounting plate 9, 9 ' is a solid plate, e.g. as a cuboid or as a circular disc, formed. Their surface is preferably hardened.
- the mounting plates 9, 9 ' lie directly on the frame 18.
- the piston receiving plate 11, 11 ' has recesses 12, 12' into which the pistons 10, 10 'protrude.
- a seal 13 is inserted into a groove.
- the fluid is via a fluid line 14 in the Cavity 15 introduced.
- the cavity 15 and the fluid line 14 are shown in Fig. 3.
- FIG. 2 shows that the individual fluid lines 14 are fluid-conductively connected to one another via a fluid collecting line 16.
- the piston 10 When introducing a fluid into the cavity 15, the piston 10 is guided out of the recess 12 out against the piston receiving plate 9. As a result, the distance between the mounting plate 9 and piston receiving plate 11 is increased. Due to the support of the piston receiving plate 9 on the frame 18, the piston receiving plate 11 is guided against the tool 1, whereby a force for compressing the tool halves 2, 3 is provided.
- the closing force can thus be variably formed, so that the pressing together of the two mold halves 2, 3 can be loosened, for example, for a subsequent flow of the material processed in the tool 1.
- FIG. 4 shows in each case the mounting plate 9, 9 'facing the tools 2, 3 directly.
- Fig. 4 shows the device according to the invention by introducing a force on the tool halves 2, 3.
- fluid which is supplied via a fluid line 17, formed in the mold chamber 4, a large pressure.
- This pressure is transmitted via the tools 2, 3 to the tool carrier components 5, 6.
- the piston receiving plates 11, 11 'and the frame 18 deform.
- This deformation is shown on the piston receiving plate 11 'and the frame 18 in an elevated form.
- the deformation of the piston receiving plate 11 ' is not transferred to the mounting plate 9'.
- the forces which are transmitted via the mounting plates 9, 9 'on the tool halves 2, 3, make up, so that the mold halves 2, 3 lie flat against deformation without deformation.
- the volume changes of the cavities 15 are compensated by an external fluid supply and the mounting plates 9,9' held together plan when applying a corresponding pressure.
- a deformation of the positioning plates 9,9 'and the tool halves 2, 3 advantageously does not occur.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Gripping On Spindles (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Hochdruckumformung mit einem Werkzeug, das entlang einer Trennebene in zwei Werkzeughälften geteilt ist, wobei die beiden Werkzeughälften eine mit einem hydrostatischen Innendruck zur Formgebung an einem umzuformenden Werkstück beaufschlagbare Formkammer ausbilden, und mit einem Werkzeugträger, der für jede Werkzeughälfte wenigstens eine dieser Werkzeughälfte zugeordnete Werkzeugträgerkomponente aufweist.The invention relates to a device for high-pressure forming with a tool which is divided along a parting plane into two tool halves, wherein the two tool halves form a loadable with a hydrostatic internal pressure for shaping a workpiece to be formed mold chamber, and with a tool carrier, for each mold half at least having one of these mold half associated tool carrier component.
Die Hochdruckumformung, die als Innen- oder als Außenhochdruckumformung ausgebildet sein kann, dient der Umformung von Werkstücken mittels Beaufschlagung der Werkstücke durch hydrostatischen Druck. Während der Hochdruckumformung wird das zu bearbeitende Werkstück von einem Werkzeug, das entlang einer Trennebene in zwei Werkzeughälften geteilt ist, umgeben, wobei dieses Werkzeug formgebend ist. Das Werkzeug weist wenigstens eine Fluidzuleitung zur Beaufschlagung des Werkstückes mit einem hydrostatischen Druck auf, der zur Umformung des Werkstückes führt.The high-pressure forming, which can be designed as internal or external high-pressure forming, is used for forming workpieces by subjecting the workpieces by hydrostatic pressure. During high-pressure forming, the workpiece to be machined is surrounded by a tool that is divided along a parting plane into two mold halves, wherein this tool is shaping. The tool has at least one fluid supply line for acting on the workpiece with a hydrostatic pressure, which leads to the deformation of the workpiece.
Auf die das Werkzeug ausbildenden Werkzeughälften wird infolge des eingebrachten hydrostatischen Druckes ein Druck ausgeübt, der zu einem Auseinanderdriften der Werkzeughälften führen würde. Die vorgesehenen Werkzeugträger verhindern dieses Auseinanderdriften, indem sie ein Einspannmittel zum Einspannen des Werkzeuges ausbilden. Jede Werkzeughälfte ist daher einer Werkzeugträgerkomponente zugeordnet, welche diese Werkzeughälfte aufnimmt.On the tool halves forming the tool pressure is exerted due to the introduced hydrostatic pressure, which would lead to a drift apart of the tool halves. The provided tool carriers prevent this drift apart by forming a clamping means for clamping the tool. Each tool half is therefore associated with a tool carrier component which receives this tool half.
Die von den Werkzeugträgerkomponenten auf die Werkzeughälften übertragenen Kräfte sind größer als die aufgrund des hydrostatischen Druckes im Werkzeug entstehenden Kräfte. Je nach der Größe des zur Umformung des Werkstückes notwendigen Innendrucks können die erforderlichen, von den Werkzeughälften aufzubringenden Zuhaltekräfte so groß sein, daß elastische Verformungen in den Werkzeughälften auftreten. Infolge dieser Kräfte sind der zur Hochdruckumformung erforderliche Präzisionsformschluß der Werkzeughälften und damit eine gleichmäßige Flächenpressung nicht mehr gegeben. Bei zu starker Werkzeugverformung kann zusätzlich für die Umformung verwendetes Fluid entweichen und der Umformprozeß behindert werden bzw. unterbrochen werden.The forces transmitted to the tool halves by the tool carrier components are greater than the forces resulting from the hydrostatic pressure in the tool. Depending on the size of the internal pressure necessary for forming the workpiece, the required locking forces to be applied by the tool halves can be so great that elastic deformations occur in the tool halves. As a result of these forces required for high-pressure forming precision mold closure of the tool halves and thus a uniform surface pressure are no longer given. If the tool is deformed too much, additional fluid used for forming can escape and the forming process can be hindered or interrupted.
Aus
Aus
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Gattung aufzuzeigen, die bei Aufrechterhalten einer gleichmäßigen und dichten Anlage der Werkzeughälften aneinander Verformungen in den Werkzeughälften zuverlässig verhindert.The invention has for its object to provide a device of the type mentioned, which reliably prevents mutually deformations in the tool halves while maintaining a uniform and tight conditioning of the tool halves.
Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß jede Werkzeugträgerkomponente aus einer Aufstellplatte, wenigstens einem auf dieser Aufstellplatte aufstehenden Kolben und einer etwa parallel zur Aufstellplatte ausgerichteten Kolbenaufnahmeplatte ausgebildet ist, wobei die Kolbenaufnahmeplatte für den Kolben eine Vertiefung aufweist, deren Durchmesser etwas größer als derThis object is achieved according to the invention in that each tool carrier component is formed from a mounting plate, at least one piston standing on this mounting plate and an approximately parallel to the mounting plate aligned piston receiving plate, wherein the piston receiving plate for the piston has a recess whose diameter is slightly larger than that
Durchmesser des Kolbens ist und wobei in einem bei Vorstehen des Kolbens in die Vertiefung ausgebildeten Hohlraum in der Vertiefung ein Fluid anordbar ist.Diameter of the piston and wherein in a formed in projecting the piston into the recess cavity in the recess, a fluid can be arranged.
Jede Werkzeugträgerkomponente der erfindungsgemäßen Vorrichtung ist aus mehreren Bauteilen ausgebildet, die miteinander in eine Wirkverbindung treten. So bildet die vorgesehene Aufstellplatte einen Grundträger aus, auf dem wenigstens einer, vorzugsweise jedoch mehrere voneinander separate Kolben aufstehen. Mit den der Aufstellplatte abgekehrten Enden stehen die Kolben bzw. steht der eine Kolben in die andere Platte, nämlich in die Kolbenaufnahmeplatte, vor. In der Kolbenaufnahmeplatte ist für jeden Kolben eine Vertiefung angeordnet, in welche jeweils ein Kolben vorstehen kann. Vertiefungswände und Kolbenwand umgeben bei Vorstehen des Kolbens in die Vertiefung einen Hohlraum, der mit einem Fluid füllbar ist.Each tool carrier component of the device according to the invention is formed from a plurality of components which come into operative connection with one another. Thus, the intended mounting plate forms a base support on which at least one, but preferably a plurality of separate pistons stand up. With the mounting plate facing away from the ends of the piston or is a piston in the other plate, namely in the piston receiving plate before. In the piston receiving plate is for each piston a recess arranged, in each of which a piston can protrude. Well walls and piston wall surrounded in projecting the piston into the recess a cavity which can be filled with a fluid.
Mit den Kolben und mit der Lagerung der Kolben in dem Fluid ist zwischen der Aufstellplatte und der Kolbenaufnahmeplatte jeder Werkzeugträgerkomponente keine starre plastische Verbindung ausgebildet. Die Verbindung ist vielmehr elastisch ausgebildet, so daß sich die Bauteile der Werkzeugträgerkomponenten gegeneinander verformen können.With the piston and the bearing of the piston in the fluid no rigid plastic connection is formed between the mounting plate and the piston receiving plate of each tool carrier component. The connection is rather elastic, so that the components of the tool carrier components can deform against each other.
Entstehende Verformungen treten nicht in den Werkzeugen, sondern in den Werkzeugträgerkomponenten auf. Die Verformungen werden dadurch von den Werkzeughälften nach außen abgeführt. Dadurch wird vorteilhaft die dichte Anlage und gleichmäßige Flächenpressung der Werkzeughälften aneinander ohne Verformung der Werkzeughälften nicht gefährdet. Die Zuhaltekraft für das Zuhalten der Werkzeughälften wird von den Werkzeugträgerkomponenten aufgebracht. Die Werkzeugträgerkomponenten sind dabei jeweils zwischen einer Werkzeughälfte und einem von außen an die Werkzeugträgerkomponente angelegten Anlageorgan angeordnet. Das Aufbringen der Kraft erfolgt durch Einführen eines Fluides in die Hohlräume, wodurch die Kolben aus den Vertiefungen abschnittsweise herausführbar sind. Der Abstand zwischen der Kolbenaufnahmeplatte und der Aufstellplatte wird durch das Herausbewegen der Kolben aus den Vertiefungen vergrößert. Dadurch wird die Werkzeugträgerkomponente fest zwischen Werkzeug und äußerem Anlageorgan eingespannt und bringt die Zuhaltekraft für das Werkzeug auf.Forming deformations do not occur in the tools, but in the tool carrier components. The deformations are thereby removed from the mold halves to the outside. As a result, the dense system and uniform surface pressure of the tool halves together without deformation of the tool halves is advantageously not endangered. The locking force for locking the tool halves is applied by the tool carrier components. The tool carrier components are in each case arranged between a tool half and a contact element applied from the outside to the tool carrier component. The application of the force is carried out by introducing a fluid into the cavities, whereby the pistons from the wells are partially herausführbar. The distance between the piston receiving plate and the mounting plate is increased by the moving out of the pistons from the wells. As a result, the tool carrier component is firmly clamped between the tool and the outer bearing element and brings the clamping force for the tool.
Durch die beiderseitige Anordnung der Werkzeugträgerkomponenten ergeben sich im Bereich des Werkzeuges gegen Null resultierende Kräfte. Verformungen des Werkzeuges, nämlich der Werkzeughälften, werden dadurch vorteilhaft ausgeschlossen. Verformungen durch das Aufbringen der Kräfte durch die Werkzeugträgerkomponenten treten in den äußeren Bereichen der Werkzeugträgerkomponenten auf. Diese Verformungen können auch auf das Anlageorgan übertragen werden, an dem das bezüglich des Werkzeuges außenliegende Bauteil der Werkzeugträgerkomponente anliegt.Due to the mutual arrangement of the tool carrier components resulting in the range of the tool to zero resulting forces. Deformations of the tool, namely the tool halves are thereby advantageously excluded. Deformations due to the application of forces by the tool carrier components occur in the outer regions of the tool carrier components. These deformations can are also transferred to the contact element on which rests with respect to the tool external component of the tool carrier component.
Nach einer ersten Weiterbildung der Erfindung ist vorgesehen, daß die Aufstellplatte der Werkzeughälfte zugekehrt ist. Die Aufstellplatte kann direkt an die Werkzeughälfte angesetzt sein. Es ist aber auch möglich, daß die Kolbenaufnahmeplatte direkt an die Werkzeughälfte angesetzt ist, dann ist die Aufstellplatte der Werkzeughälfte abgekehrt. Das der Werkzeughälfte zugekehrte Bauteil der Werkzeugträgerkomponente und die Werkzeughälfte können auch einstückig ausgebildet sein.According to a first embodiment of the invention it is provided that the mounting plate of the tool half is facing. The mounting plate can be attached directly to the tool half. But it is also possible that the piston receiving plate is attached directly to the mold half, then the mounting plate of the tool half is turned away. The tool half of the component facing the tool carrier component and the tool half can also be integrally formed.
Es kann vorgesehen sein, daß ein Kolben mit großem Durchmesser eingesetzt wird. Vorzugsweise werden aber mehrere etwa gleichmäßig über die Erstreckung der Aufstellplatte verteilte Kolben eingesetzt, welche über die Aufstellplatte verteilt die Kräfte aufbringen können.It can be provided that a piston with a large diameter is used. Preferably, however, a plurality of approximately evenly distributed over the extension of the mounting plate pistons are used, which distributed over the mounting plate can muster the forces.
Damit die Vertiefungen der Kolbenaufnahmeplatte und die in diese Vertiefungen vorstehenden Kolben einen fluiddichten Hohlraum ausbilden, sieht eine Weiterbildung der Erfindung vor, daß in die Seitenwandung jeder Vertiefung eine Dichtung eingelassen ist, an welche sich der Kolben mit seiner Seitenwandung anlegt. Durch die Dichtung wird eine Abdichtung des Hohlraumes erreicht, die verhindert, daß Fluid aus dem Hohlraum an den Kolben vorbei nach außen austritt. Die Dichtung ist vorzugsweise als umlaufender Dichtungsring ausgebildet.So that the recesses of the piston receiving plate and the protruding into these recesses piston form a fluid-tight cavity, a development of the invention provides that in the side wall of each recess a seal is inserted, to which the piston rests with its side wall. Through the seal, a seal of the cavity is achieved, which prevents fluid from leaking from the cavity past the piston to the outside. The seal is preferably designed as a circumferential sealing ring.
Nach einer nächsten Weiterbildung der Erfindung ist vorgesehen, daß in den Hohlraum in der Vertiefung zumindest eine Fluidleitung einmündet. Durch das Einführen eines Fluides über die Fluidleitung in den Hohlraum wird der Kolben aus dem Hohlraum herausgedrückt, dieser drückt dann auf die Kolbenaufstellplatte. Mit dem Fluid wird somit eine Kraft erzeugt, welche bei Anlage der Werkzeugträgerkomponente an einem Anlageorgan auf das Werkzeug übertragbar ist.According to a next development of the invention, it is provided that at least one fluid line opens into the cavity in the recess. By introducing a fluid through the fluid line into the cavity, the piston is pushed out of the cavity, this then presses on the Kolbenaufstellplatte. Thus, a force is generated with the fluid which can be transferred to the tool when the tool carrier component is applied to a contact element.
Werden wenigstens zwei Hohlräume über die Fluidleitung miteinander fluidleitend verbunden, so ist eine Leitung des Fluides eines Hohlraumes über die Fluidleitung in den anderen Hohlraum ermöglicht. Durch die Verbindung der Hohlräume wirkt der Fluiddruck gleichmäßig auf die Kolben. Mit Fluiddruckänderungen kann die gleichmäßige Flächenpressung auf das Werkstück verändert werden.If at least two cavities are fluid-conductively connected to one another via the fluid line, then a conduit of the fluid of one cavity is made possible via the fluid line into the other cavity. By connecting the cavities of the fluid pressure acts evenly on the piston. With fluid pressure changes, the uniform surface pressure on the workpiece can be changed.
Die Kolben stehen auf der Aufstellplatte lose auf. Die Aufstellplatte weist dafür vorzugsweise eine gehärtete Oberfläche auf. Die voneinander separaten und auch von Aufstellplatte und Kolbenaufnahmeplatte separaten Kolben können einzeln gehandhabt werden, insbesondere können sie einzeln einer Oberflächenveredlung zugeführt werden. Weiterbildungen der Erfindung sehen vor, daß die Oberfläche der Kolben gehärtet und/oder verchromt ist. Die Kolben können neben der Härtung und Verchromung noch geschliffen sein, damit sie plane Oberflächen aufweisen. Die Verchromung dient auch dem Schutz der Kolben gegen Umwelteinflüsse, sie führt zu einer Verminderung der Reibkräfte und verringert den Verschleiß der Dichtungen.The pistons stand loose on the mounting plate. The mounting plate preferably has a hardened surface for this purpose. The separate from each other and also separate from the mounting plate and piston receiving plate piston can be handled individually, in particular they can be individually supplied to a surface finishing. Developments of the invention provide that the surface of the piston is hardened and / or chrome-plated. The pistons can be polished in addition to the hardening and chrome plating, so that they have flat surfaces. The chrome plating also serves to protect the pistons against environmental influences, it leads to a reduction of the frictional forces and reduces the wear of the seals.
Bei der erfindungsgemäßen Vorrichtung ist nur auf einer Seite der Kolben ein Hohlraum mit einem Fluid anzuordnen. Auf der anderen Seite stehen die Kolben auf der Aufstellplatte auf.In the device according to the invention, a cavity with a fluid is to be arranged only on one side of the piston. On the other side, the pistons stand on the mounting plate.
Die separate Ausbildung der Kolben ermöglicht neben ihrer separaten Fertigung die preiswertere Herstellung der Werkzeugträgerkomponente insgesamt.The separate design of the piston allows in addition to their separate production, the cheaper production of the tool carrier component as a whole.
Ein Ausführungsbeispiel der Erfindung, aus dem sich weitere erfinderische Merkmale ergeben, ist in der Zeichnung dargestellt. Es zeigen:
- Fig. 1
- eine schematische Teilseitenansicht einer Vorrichtung zur Innenhochdruckumformung;
- Fig. 2
- einen Schnitt der Vorrichtung entlang der Schnittlinie II-II in Fig. 1;
- Fig. 3
- eine perspektivische Teilschnittansicht der Vorrichtung in Fig. 1 und
- Fig. 4
- eine Teilseitenansicht einer zweiten Vorrichtung zur Innenhochdruckumformung.
- Fig. 1
- a schematic partial side view of a device for hydroforming;
- Fig. 2
- a section of the device along the section line II-II in Fig. 1;
- Fig. 3
- a partial perspective sectional view of the device in Fig. 1 and
- Fig. 4
- a partial side view of a second device for hydroforming.
Die Vorrichtung zur Innenhochdruckumformung in Fig. 1 weist ein Werkzeug 1 auf, das aus zwei etwa quaderförmigen Werkzeughälften 2, 3 zusammengesetzt ist. Die beiden Werkzeughälften 2, 3 liegen aufeinander auf, sie bilden eine Formkammer 4 aus. In der Formkammer 4 ist ein Werkstück mit einem hydrostatischen Druck formgebbar bearbeitbar.The apparatus for hydroforming in Fig. 1 comprises a
Jeder Werkzeughälfte 2, 3 ist eine Werkzeugträgerkomponente 5, 6 zugeordnet. Die Werkzeugträgerkomponente 5 ist auf das Werkzeug 2 aufgelegt, während die Werkzeuge 3, 2 und die Werkzeugträgerkomponente 5 insgesamt auf die Werkzeugträgerkomponente 6 aufgelegt sind. Um die Werkzeugträgerkomponenten 5, 6 herum ist ein schematisch dargestelltes Anlageorgan, ein Rahmen 18, gelegt.Each
Im in Fig. 1 geschnitten dargestellten Bereich der Werkzeugträgerkomponente 6 ist ersichtlich, daß jede Werkzeugträgerkomponente aus einer Aufstellplatte 9, 9', auf dieser Aufstellplatte 9, 9' aufstehenden Kolben 10, 10' und einer Kolbenaufnahmeplatte 11, 11' ausgebildet ist. Die Aufstellplatte 9, 9' ist dabei als massive Platte, z.B. als Quader oder als kreisrunde Scheibe, ausgebildet. Ihre Oberfläche ist vorzugsweise gehärtet. Auf ihr stehen die von der Aufstellplatte 9, 9' separaten Kolben 10, 10' lose auf. Die Aufstellplatten 9, 9' liegen unmittelbar am Rahmen 18 an.In the section of the
Die Kolbenaufnahmeplatte 11, 11' weist Vertiefungen 12, 12' auf, in welche die Kolben 10, 10' vorstehen. In die Seitenwandung jeder Vertiefung 12, 12' ist in eine Nut eine Dichtung 13 eingesetzt. Ein Kolben 10, 10' steht in eine Vertiefung 12, 12' vor, von den Vertiefungswänden und der Begrenzung des Kolbens 10, 10' wird in der Vertiefung 12, 12' ein Hohlraum 15 ausgebildet, der mit einem Fluid füllbar ist. Das Fluid wird über eine Fluidleitung 14 in den Hohlraum 15 eingeführt. Der Hohlraum 15 und die Fluidleitung 14 sind in Fig. 3 dargestellt. Fig. 2 zeigt, daß die einzelnen Fluidleitungen 14 über eine Fluidsammelleitung 16 miteinander fluidleitend verbunden sind. Beim Einführen eines Fluides in den Hohlraum 15 wird der Kolben 10 aus der Vertiefung 12 heraus gegen die Kolbenaufnahmeplatte 9 geführt. Dadurch wird der Abstand zwischen Aufstellplatte 9 und Kolbenaufnahmeplatte 11 vergrößert. Aufgrund des Abstützens der Kolbenaufnahmeplatte 9 an dem Rahmen 18 wird die Kolbenaufnahmeplatte 11 gegen das Werkzeug 1 geführt, wodurch eine Kraft zum Zusammendrücken der Werkzeughälften 2, 3 bereitgestellt ist.The
Durch ein Verändern der in die Hohlräume 15 eingeführten Fluidmenge ist eine Änderung der durch die Werkzeugträgerkomponenten 5, 6 bereitgestellten Werkzeugschließkraft möglich. Die Schließkraft ist somit variabel ausbildbar, so daß das Aufeinanderpressen der beiden Werkzeughälften 2, 3 zum Beispiel für ein Nachfließen des im Werkzeug 1 verarbeiteten Materials gelockert werden kann.By changing the amount of fluid introduced into the
In Fig. 4 ist jeweils ein Kolben 10, 10' gezeigt. Die in den Nuten der Seitenwandungen der Vertiefungen 12, 12' angeordneten Dichtungen 13 sind deutlich dargestellt.4, a
In Fig. 4 ist abweichend zu Fig. 1 bis 3 jeweils die Aufstellplatte 9, 9' den Werkzeugen 2, 3 unmittelbar zugekehrt. Auf diesen Aufstellplatten 9, 9' stehen wieder die Kolben 10, 10' auf, während sie in Vertiefungen 12, 12' in den Kolbenaufnahmeplatten 11, 11' vorstehen.In contrast to FIGS. 1 to 3, FIG. 4 shows in each case the mounting
Fig. 4 zeigt die erfindungsgemäße Vorrichtung unter Einbringen einer Kraft auf die Werkzeughälften 2, 3. Durch das in die Formkammer 4 eingebrachte Fluid, das über eine Fluidleitung 17 zugeführt wird, entsteht in der Formkammer 4 ein großer Druck. Dieser Druck wird über die Werkzeuge 2, 3 auf die Werkzeugträgerkomponenten 5, 6 übertragen. Bei Aufrechterhalten der Gegenkräfte durch Einführung von Fluid in die Hohlräume 15 verformen sich die Kolbenaufnahmeplatten 11, 11' und der Rahmen 18.Fig. 4 shows the device according to the invention by introducing a force on the tool halves 2, 3. By introduced into the
Diese Verformung ist an der Kolbenaufnahmeplatte 11' und dem Rahmen 18 in überhöhter Form gezeigt. Über das im Hohlraum 15 befindliche Fluid und den Kolben 10 wird die Verformung der Kolbenaufnahmeplatte 11' nicht auf die Aufstellplatte 9' übertragen. Die Kräfte, welche über die Aufstellplatten 9, 9' auf die Werkzeughälften 2, 3 übertragen werden, gleichen sich aus, so daß die Werkzeughälften 2, 3 ohne Verformung plan aufeinanderliegen. Bei der Verformung der Kolbenaufnahmeplatten 11,11' werden durch eine externe Fluidversorgung die Volumenänderungen der Hohlräume 15 ausgeglichen und bei Aufbringen eines entsprechenden Druckes die Aufstellplatten 9,9' plan zusammengehalten. Eine Verformung der Aufstellplatten 9,9' und der Werkzeughälften 2, 3 tritt vorteilhaft nicht auf.This deformation is shown on the piston receiving plate 11 'and the
Claims (11)
- Hydroforming device, comprising a tool (1) which is divided along a parting plane into two tool halves (2, 3), the two tool halves forming a shaping chamber (4) which can be subjected to a hydrostatic internal pressure for shaping a blank to be shaped, and comprising a tool carrier which has for each tool half at least one tool carrier component (5, 6) associated with this tool half, characterised in that each tool carrier component (5, 6) is formed by a platen (9, 9'), at least one piston (10, 10') resting loosely against said platen (9, 9') and a piston-receiving plate (11, 11'), the piston-receiving plate (11, 11') having a recess (12, 12') for the piston (10, 10'), the diameter of which recess (12, 12') is somewhat larger than the diameter of the piston (10, 10'), and a fluid being arrangeable in a cavity (15) in the recess (12, 12'), which cavity (15) is farmed when the piston (10, 10') projects into the recess (12, 12').
- Device according to claim 1, characterised in that the platen (9, 9') is oriented towards the tool half (5, 6).
- Device according to claim 1, characterised in that the platen (9, 9') is oriented away from the tool half (5, 6).
- Device according to any one of the preceding claims, characterised in that a plurality of pistons (10, 10') distributed approximately uniformly over the extension of the platen (9, 9') are provided.
- Device according to any one of the preceding claims, characterised in that a seal (13) against which the side wall of the piston (10, 10') bears is recessed in the side wall of each recess (12, 12').
- Device according to claim 5, characterised in that the seal (13) is in the form of a circumferential sealing ring.
- Device according to any one of the preceding claims, characterised in that at least one fluid line (14) opens into the cavity (15) in the recess (12, 12'),
- Device according to claim 7, characterised in that at least two cavities (15) are connected to one another in a fluid-conducting manner via the fluid line (14, 16).
- Device according to any one of the preceding claims, characterised in that the surface of the platen (9, 9') has a hardened portion.
- Device according to any one of the preceding claims, characterised in that the surface of the piston (10, 10') is hardened.
- Device according to any one of the preceding claims, characterised in that the surface of the piston (10, 10') is chromium-plated.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10313567A DE10313567B3 (en) | 2003-03-26 | 2003-03-26 | Device for high pressure deformation of workpieces using hydrostatic pressure comprises a tool divided into two tool halves, and a tool support having tool support components |
DE10313567 | 2003-03-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1462191A1 EP1462191A1 (en) | 2004-09-29 |
EP1462191B1 true EP1462191B1 (en) | 2007-07-25 |
Family
ID=30775646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04006919A Expired - Lifetime EP1462191B1 (en) | 2003-03-26 | 2004-03-23 | Hydroforming device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1462191B1 (en) |
AT (1) | ATE367876T1 (en) |
DE (2) | DE10313567B3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3693157A1 (en) | 2019-02-05 | 2020-08-12 | FF Fluid Forming GmbH | Fluid forming apparatus |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014003350A1 (en) * | 2014-03-07 | 2015-09-10 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for forming a workpiece |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19858837B4 (en) * | 1998-12-19 | 2005-03-17 | Bayerische Motoren Werke Ag | Press for hydroforming |
DE10137476A1 (en) * | 2000-12-12 | 2002-06-13 | Stamm Anneliese | Process and device for hydroforming |
US7047780B2 (en) * | 2001-06-29 | 2006-05-23 | Dana Corporation | Apparatus for performing a hydroforming operation |
-
2003
- 2003-03-26 DE DE10313567A patent/DE10313567B3/en not_active Expired - Lifetime
-
2004
- 2004-03-23 EP EP04006919A patent/EP1462191B1/en not_active Expired - Lifetime
- 2004-03-23 DE DE502004004405T patent/DE502004004405D1/en not_active Expired - Lifetime
- 2004-03-23 AT AT04006919T patent/ATE367876T1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3693157A1 (en) | 2019-02-05 | 2020-08-12 | FF Fluid Forming GmbH | Fluid forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
ATE367876T1 (en) | 2007-08-15 |
DE502004004405D1 (en) | 2007-09-06 |
EP1462191A1 (en) | 2004-09-29 |
DE10313567B3 (en) | 2004-02-26 |
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