EP1095717A2 - Method and device for hydromechanical deep drawing of metal sheet - Google Patents

Method and device for hydromechanical deep drawing of metal sheet Download PDF

Info

Publication number
EP1095717A2
EP1095717A2 EP00122059A EP00122059A EP1095717A2 EP 1095717 A2 EP1095717 A2 EP 1095717A2 EP 00122059 A EP00122059 A EP 00122059A EP 00122059 A EP00122059 A EP 00122059A EP 1095717 A2 EP1095717 A2 EP 1095717A2
Authority
EP
European Patent Office
Prior art keywords
sheet
tool
upper tool
sheet metal
holding force
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.)
Withdrawn
Application number
EP00122059A
Other languages
German (de)
French (fr)
Other versions
EP1095717A3 (en
Inventor
Ralf B. Dr. Ing. Kolleck
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.)
Schuler SMG GmbH and Co KG
Original Assignee
Schuler SMG GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schuler SMG GmbH and Co KG filed Critical Schuler SMG GmbH and Co KG
Publication of EP1095717A2 publication Critical patent/EP1095717A2/en
Publication of EP1095717A3 publication Critical patent/EP1095717A3/en
Withdrawn legal-status Critical Current

Links

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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/205—Hydro-mechanical deep-drawing

Definitions

  • the invention relates to a method for hydromechanical Deep drawing by placing the sheet in the parting line between one Upper tool and a lower tool, one of which the shape contour, clamped liquid-tight and by means of the tool having the shape contour against hydraulic cushion reshaped in the other tool becomes.
  • the Hydro-Mec process has the disadvantage that components manufactured thereafter only one with thin walls and weak contours possess moderate dimensional stability.
  • stretch forming is the entire degree of deformation is worked out solely by stretching the sheet.
  • this leads to higher dimensional stability it does is the process in terms of the degree of deformation, as well severely limited in terms of the sheet thicknesses that can be processed.
  • the invention has for its object the latter Improve procedures, especially higher cycle times too allow and to avoid slipping.
  • Pneumatic preforming means that there is a need for hydraulic medium in the subsequent final shaping and will be less the hydraulic medium in the final forming process from the lower tool only displaced.
  • the pneumatic preforming takes place preferably in the empty or partially filled lower tool, that only towards the end or after completion of the Preforming process filled or filled with the hydraulic medium becomes.
  • the final shaping then takes place by means of of the shape of the upper tool against the as Hydraulic medium acting in the cushion in the lower tool, the corresponding the advance of the forming tool from the lower tool is ousted.
  • the preforming and final shaping takes place in one direction, so that the disadvantages of stretch-slip molding omitted.
  • the method according to the invention enables it also, composite sheets and coated sheets reshape without delamination or cracking is coming.
  • the sheet is made by means of the compressed gas preformed with high clamping force (sheet holding force) and stretched at the same time.
  • sheet holding force sheet holding force
  • This procedure is recommended especially when forming high-strength steels and less Wall thicknesses. Due to the high sheet holding force reaches a stretched out extent of the later component center, resulting in better dimensional stability of the finished Component leads. This is especially true if the sheet by means of the tool having the shape contour at then reduced sheet metal holding force is finally formed.
  • the sheet is lower Sheet holding force preformed and with higher sheet holding force finished. This allows the material to be preformed bring them specifically into the center of the component and can more complex components with reduced tendency to crack be compared to conventional Thermoforming processes achieve a reduced number of drawing stages leaves.
  • the invention is also based on the object of a device for hydromechanical deep drawing of sheet metal propose, by means of which the inventive method can be carried out.
  • a device has Lower tool, an upper tool and a sheet metal holder, wherein the upper tool has the shape contour, while the Lower tool has a connection for a hydraulic medium.
  • Such a device is distinguished according to the invention characterized in that in the of the upper tool and the clamped sheet metal limited space compressed gas can be supplied.
  • the upper tool can have at least one ventilation opening which can be driven open after completion of the preforming is, so that the subsequent final forms Tool having a shape contour essentially under atmospheric pressure works against the preformed sheet. Instead the pressure can also be built up by movement alone of the press ram having the shape contour.
  • the forming unit 1 is otherwise constructed in the usual way Deep drawing press consists of a lower tool 2, which is designed as a water tank and with at least a channel 3 is equipped, via the arrow 4 Hydraulic medium, preferably water, can be supplied.
  • the Forming unit also has an upper tool 5 in the form of a Stamp with the contour 6 on.
  • the upper tool 5 is surrounded by a hold-down 7 and guided in this.
  • the hold-down 7 is with one or more Provided channels 8 through which the compressed gas according to the direction arrow 9 is supplied.
  • the compressed gas passes through a Ring channel in the hold-down device and between this and the Flat gasket arranged channels or gaps in the room below the stamp 5. Instead, the compressed gas can also be fed through the stamp.
  • the metal sheet 10 is placed in the form of a plate in the opened tool and the hold-down device 7 and the lower tool 2 are moved together until the sheet 10 is firmly clamped.
  • the clamping is done with a high sheet holding force F 1 .
  • compressed gas is fed into the space between the upper tool 5 and sheet metal 10 and the latter is preformed into the lower tool 2 under the action of the compressed gas, the preform being designed to be axially symmetrical.
  • the preforming can take place with a high sheet holding force and then leads to a stretching of the sheet and thus to a stabilization. With a low sheet metal holding force, material can mainly be brought into the center of the component, which is recommended for complex components.
  • pressurized water is supplied via the channel 3 according to the direction arrow 4 (FIG. 3), so that the lower tool 2 is filled or refilled.
  • the upper tool 5 is driven according to arrow 12 and the preform against the hydraulic cushion 13 in the lower tool 2 is formed into the final component, the sheet being able to retract between the hold-down device 7 and the lower tool 2 due to the reduced sheet holding force F 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

For a hydromechanical deep drawing shaping action, on a metal sheet, a gas under pressure is applied to the sheet in the shaping direction to give an initial shaping action. A tool with the required contour gives the metal sheet the final shaping. The gas is fed in under pressure, from a gas supply connection (9), into the space (11) between the upper die (5) and the clamped metal sheet (10).

Description

Die Erfindung betrifft ein Verfahren zum hydromechanischen Tiefziehen, indem das Blech in der Trennebene zwischen einem Oberwerkzeug und einem Unterwerkzeug, von denen eines die Formkontur aufweist, flüssigkeitsdicht eingespannt und mittels des die Formkontur aufweisenden Werkzeugs gegen ein hydraulisches Kissen in dem anderen Werkzeug umgeformt wird.The invention relates to a method for hydromechanical Deep drawing by placing the sheet in the parting line between one Upper tool and a lower tool, one of which the shape contour, clamped liquid-tight and by means of the tool having the shape contour against hydraulic cushion reshaped in the other tool becomes.

Neben dem herkömmlichen, mechanischen Tiefziehen zum Umformen von Metallblech setzen sich zunehmend Tiefziehverfahren durch, bei denen das Wirkmedium eine Flüssigkeit, im einfachsten Fall Wasser, ist. So wird bei dem sogenannten Hydro-Mec-Tiefziehverfahren (DE 1 240 801) das Blech zwischen einem Niederhalter und einem Unterwerkzeug eingespannt. Das Unterwerkzeug ist als Wasserkasten ausgebildet. Mit dem die Formkontur aufweisenden Oberwerkzeug wird das Blech gegen das als Kissen wirkende Hydraulikmedium umgeformt und das Hydraulikmedium entsprechend dem Vorschub des formenden Werkzeugs verdrängt. Die umgekehrte Arbeitsweise bezeichnet man als hydromechanisches Streck-Umformen, bei dem das Blech mittels steuerbaren Hydraulikdrucks gegen die Formkontur des Oberwerkzeugs umgeformt wird. Das Hydro-Mec-Verfahren hat den Nachteil, daß danach hergestellte Bauteile mit geringer Wandstärke und schwacher Konturierung nur eine mäßige Formstabilität besitzen. Beim Streck-Umformen wird der gesamte Umformgrad allein durch Strecken des Blechs erarbeitet. Dies führt zwar zu höherer Formstabilität, doch ist das Verfahren hinsichtlich des Umformgrades, als auch hinsichtlich der verarbeitbaren Blechstärken stark eingeschränkt.In addition to the conventional, mechanical deep drawing for forming deep-drawing processes are increasingly being used for sheet metal through in which the active medium is a liquid, in the simplest Case water, is. This is the case with the so-called Hydro-Mec deep-drawing process (DE 1 240 801) the sheet between clamped down and a lower tool. The The lower tool is designed as a water box. With the The upper tool, which has a shape contour, is countered reshaped the hydraulic medium acting as a cushion and that Hydraulic medium according to the feed of the forming Tool displaced. The reverse way of working is called one as hydromechanical stretch forming, in which the Sheet by means of controllable hydraulic pressure against the shape contour the upper tool is formed. The Hydro-Mec process has the disadvantage that components manufactured thereafter only one with thin walls and weak contours possess moderate dimensional stability. When stretch forming is the entire degree of deformation is worked out solely by stretching the sheet. Although this leads to higher dimensional stability, it does is the process in terms of the degree of deformation, as well severely limited in terms of the sheet thicknesses that can be processed.

Um insbesondere tiefere Konturen ausformen zu können, ist das Streck-Stülp-Umformen bekannt (DE 41 34 596), bei dem das eine Werkzeug eine Vorform mit geringerer Formtiefe, das andere Werkzeug die endgültige Formkontur aufweist und beide Werkzeuge mit Druckmittel beaufschlagbar sind. Es wird das fest eingespannte Blech zunächst durch das Druckmittel in das Vorformwerkzeug und anschließend durch Druckbeaufschlagung von der anderen Seite in die endgültige Formkontur eingeformt. Dieses Verfahren ist vom Ablauf her, wie auch werkzeug- und maschinentechnisch sehr aufwendig.In order to be able to form deeper contours in particular, is the stretch-overturning known (DE 41 34 596), in which one tool is a preform with a smaller depth of form, the other tool has the final shape and Both tools can be pressurized. It the tightly clamped sheet is first of all by the pressure medium into the preform and then pressurized from the other side to the final one Contour molded in. This procedure is based on the process as well as tool and machine technology very complex.

Schließlich ist es bekannt (EP 0 704 258), das bei hoher Blechhaltekraft eingespannte Blech mittels des Hydraulikmediums im Unterwerkzeug in das Oberwerkzeug vorzuformen und dabei gleichzeitig zu dehnen und anschließend bei geringerer Blechhaltekraft auf die Formkontur des Oberwerkzeugs aufzuformen, wobei das Blech keine nennenswerte weitere Dehnung erfährt. Hiermit läßt sich auch bei geringer Blechstärke und mäßigem Umformgrad aufgrund der Dehnung beim Vorformen eine höhere Formstabilität verwirklichen. Nachteilig ist die relativ große Umwälzmenge an Hydraulikmedium, so daß das Entleeren zeitaufwendig ist. Auch wird das Material der Vorform beim Endformen gestülpt. Finally, it is known (EP 0 704 258) that at high Sheet holding force clamped sheet by means of the hydraulic medium preform in the lower tool into the upper tool and thereby stretching at the same time and then with less Sheet holding force on the contour of the upper tool to form, the sheet no other significant Undergoes stretching. This can also be used with less Sheet thickness and moderate degree of deformation due to the stretch achieve greater dimensional stability during preforming. The relatively large circulation volume of hydraulic medium is disadvantageous, so that emptying is time consuming. Also will the material of the preform turned over during the final shaping.

Der Erfindung liegt die Aufgabe zugrunde, das letztgenannte Verfahren zu verbessern, insbesondere höhere Taktzeiten zu ermöglichen und das Stülpen zu vermeiden.The invention has for its object the latter Improve procedures, especially higher cycle times too allow and to avoid slipping.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Blech mittels Druckgas in Umformrichtung beaufschlagt und vorgeformt und anschließend mittels des die Formkontur aufweisenden Werkzeugs endgeformt wird.This object is achieved in that the Pressurized sheet metal in the forming direction and preformed and then by means of the shape contour Tool is finally formed.

Durch das pneumatische Vorformen ist der Bedarf an Hydraulikmedium beim anschließenden Endformen geringer und wird das Hydraulikmedium im Endformprozeß aus dem Unterwerkzeug ausschließlich verdrängt. Das pneumatische Vorformen erfolgt vorzugsweise in das leere oder teilweise gefüllte Unterwerkzeug, das erst gegen Ende oder nach Abschluß des Vorformprozesses mit dem Hydraulikmedium gefüllt bzw. aufgefüllt wird. Anschließend erfolgt das Endformen mittels des die Formkontur aufweisenden Oberwerkzeugs gegen das als Kissen wirkende Hydraulikmedium im Unterwerkzeug, das entsprechend dem Vorschub des formenden Werkzeugs aus dem Unterwerkzeug verdrängt wird. Das Vorformen und Endformen erfolgt in einer Richtung, so daß die Nachteile des Streck-Stülpformens entfallen. Das erfindungsgemäße Verfahren ermöglicht es ferner, Verbundbleche und beschichtete Bleche umzuformen, ohne daß es zur Delaminierung oder Rißbildung kommt.Pneumatic preforming means that there is a need for hydraulic medium in the subsequent final shaping and will be less the hydraulic medium in the final forming process from the lower tool only displaced. The pneumatic preforming takes place preferably in the empty or partially filled lower tool, that only towards the end or after completion of the Preforming process filled or filled with the hydraulic medium becomes. The final shaping then takes place by means of of the shape of the upper tool against the as Hydraulic medium acting in the cushion in the lower tool, the corresponding the advance of the forming tool from the lower tool is ousted. The preforming and final shaping takes place in one direction, so that the disadvantages of stretch-slip molding omitted. The method according to the invention enables it also, composite sheets and coated sheets reshape without delamination or cracking is coming.

In bevorzugter Ausführung wird das Blech mittels des Druckgases bei hoher Einspannkraft (Blechhaltekraft) vorgeformt und dabei zugleich gedehnt. Dieses Verfahren empfiehlt sich insbesondere beim Umformen höherfester Stähle und geringer Wandstärken. Dabei wird aufgrund der hohen Blechhaltekraft eine geziehlte Ausstreckung der späteren Bauteilmitte erreicht, was zu einer besseren Formstabilität des fertigen Bauteils führt. Dies gilt insbesondere dann, wenn das Blech mittels des die Formkontur aufweisenden Werkzeugs bei dann verminderter Blechhaltekraft endgeformt wird.In a preferred embodiment, the sheet is made by means of the compressed gas preformed with high clamping force (sheet holding force) and stretched at the same time. This procedure is recommended especially when forming high-strength steels and less Wall thicknesses. Due to the high sheet holding force reaches a stretched out extent of the later component center, resulting in better dimensional stability of the finished Component leads. This is especially true if the sheet by means of the tool having the shape contour at then reduced sheet metal holding force is finally formed.

Bei einer Verfahrensvariante wird das Blech mit niedriger Blechhaltekraft vorgeformt und bei höherer Blechhaltekraft endgeformt. Dadurch läßt sich das Material beim Vorformen gezielt in die Bauteilmitte bringen und können beim Endformen komplexere Bauteile bei verringerter Rißneigung hergestellt werden, wobei sich gegenüber konventionellen Tiefziehverfahren eine verringerte Ziehstufenanzahl verwirklichen läßt.In one process variant, the sheet is lower Sheet holding force preformed and with higher sheet holding force finished. This allows the material to be preformed bring them specifically into the center of the component and can more complex components with reduced tendency to crack be compared to conventional Thermoforming processes achieve a reduced number of drawing stages leaves.

Durch die Tatsache, daß ein Teil des Umformgrades, nämlich bis zur Bildung der Vorform, mit einem gasförmigen Wirkmedium aufgebracht wird, ist eine schnelle Entleerung möglich und keine Säuberung erforderlich.Due to the fact that part of the degree of deformation, namely until the preform is formed with a gaseous active medium applied, rapid emptying is possible and no cleaning required.

Der Erfindung liegt ferner die Aufgabe zugrunde, eine Vorrichtung zum hydromechanischen Tiefziehen von Metallblech vorzuschlagen, mittels der das erfindungsgemäße Verfahren durchgeführt werden kann. Eine solche Vorrichtung weist ein Unterwerkzeug, ein Oberwerkzeug und einen Blechhalter auf, wobei das Oberwerkzeug die Formkontur besitzt, während das Unterwerkzeug einen Anschluß für ein Hydraulikmedium aufweist. Eine solche Vorrichtung zeichnet sich erfindungsgemäß dadurch aus, daß in den von dem Oberwerkzeug und dem eingespannten Blech begrenzten Raum Druckgas zuführbar ist.The invention is also based on the object of a device for hydromechanical deep drawing of sheet metal propose, by means of which the inventive method can be carried out. Such a device has Lower tool, an upper tool and a sheet metal holder, wherein the upper tool has the shape contour, while the Lower tool has a connection for a hydraulic medium. Such a device is distinguished according to the invention characterized in that in the of the upper tool and the clamped sheet metal limited space compressed gas can be supplied.

Dies kann beispielsweise dadurch geschehen, daß das Oberwerkzeug oder der Blechhalter, sofern er als Niederhalter ausgebildet ist wenigstens einen Druckgasanschluß aufweist, der nach Einspannen des Blechs aufsteuerbar ist. This can be done, for example, by the upper tool or the sheet metal holder, provided that it acts as a hold-down device is formed has at least one compressed gas connection, which can be opened after clamping the sheet.

Ferner kann das Oberwerkzeug wenigstens eine Entlüftungsöffnung aufweisen, die nach Abschluß des Vorformens aufsteuerbar ist, so daß beim anschließenden Endformen das die Formkontur aufweisende Werkzeug im wesentlichen unter Atmosphärendruck gegen das vorgeformte Blech arbeitet. Stattdessen kann der Druckaufbau auch allein durch die Bewegung des die Formkontur aufweisenden Pressenstössels erfolgen.Furthermore, the upper tool can have at least one ventilation opening which can be driven open after completion of the preforming is, so that the subsequent final forms Tool having a shape contour essentially under atmospheric pressure works against the preformed sheet. Instead the pressure can also be built up by movement alone of the press ram having the shape contour.

Nachstehend ist die Erfindung anhand eines in der Zeichnung schematisch wiedergegebenen Ausführungsbeispiels in mehreren Betriebsphasen beschrieben. In der Zeichnung zeigen:

Fig. 1
die Umformeinheit einer Tiefziehpresse im Ausgangszustand;
Fig. 2
die Umformeinheit gemäß Fig. 1 nach dem Vorformen des Blechs und
Fig. 3
die Umformeinheit gemäß Fig. 1 nach dem Endformen des Blechs.
The invention is described below using an exemplary embodiment shown schematically in the drawing in several operating phases. The drawing shows:
Fig. 1
the forming unit of a deep-drawing press in the initial state;
Fig. 2
1 after the sheet has been preformed and
Fig. 3
1 after the final shaping of the sheet.

Die Umformeinheit 1 einer ansonsten in üblicher Weise aufgebauten Tiefziehpresse besteht aus einem Unterwerkzeug 2, das als Wasserkasten ausgebildet ist und mit wenigstens einem Kanal 3 ausgestattet ist, über den gemäß Pfeil 4 ein Hydraulikmedium, vorzugsweise Wasser, zuführbar ist. Die Umformeinheit weist ferner ein Oberwerkzeug 5 in Form eines Stempels mit der Formkontur 6 auf. Das Oberwerkzeug 5 ist von einem Niederhalter 7 umgeben und in diesem geführt. Auf der Wirkfläche des Niederhalters ist eine Flachdichtung angeordnet. Der Niederhalter 7 ist mit einem oder mehreren Kanälen 8 versehen, über die das Druckgas gemäß Richtungspfeil 9 zugeführt wird. Das Druckgas gelangt über einen Ringkanal im Niederhalter und zwischen diesem und der Flachdichtung angeordnete Kanäle oder Spalte in den Raum unterhalb des Stempels 5. Stattdessen kann das Druckgas auch durch den Stempel zugeführt werden.The forming unit 1 is otherwise constructed in the usual way Deep drawing press consists of a lower tool 2, which is designed as a water tank and with at least a channel 3 is equipped, via the arrow 4 Hydraulic medium, preferably water, can be supplied. The Forming unit also has an upper tool 5 in the form of a Stamp with the contour 6 on. The upper tool 5 is surrounded by a hold-down 7 and guided in this. There is a flat seal on the active surface of the hold-down device arranged. The hold-down 7 is with one or more Provided channels 8 through which the compressed gas according to the direction arrow 9 is supplied. The compressed gas passes through a Ring channel in the hold-down device and between this and the Flat gasket arranged channels or gaps in the room below the stamp 5. Instead, the compressed gas can also be fed through the stamp.

In das geöffnete Werkzeug wird das Metallblech 10 in Form einer Platine eingelegt und der Niederhalter 7 sowie das Unterwerkzeug 2 zusammengefahren, bis das Blech 10 fest eingespannt ist. Die Einspannung erfolgt mit einer hohen Blechhaltekraft F1. Nach dem Einspannen des Blechs wird Druckgas in den Raum zwischen Oberwerkzeug 5 und Blech 10 zugeführt und letzteres unter Wirkung des Druckgases in das Unterwerkzeug 2 vorgeformt, wobei die Vorform achssymmetrisch ausgebildet ist. Das Vorformen kann bei hoher Blechhaltekraft erfolgen und führt dann zu einem Dehnen des Blechs und damit zu einer Stabilisierung. Bei niedriger Blechhaltekraft kann Material vorwiegend in die Bauteilmitte verbracht werden, was sich bei komplexen Bauteilen empfiehlt. Nach dem Vorformen wird über den Kanal 3 Druckwasser gemäß Richtungspfeil 4 zugeführt (Fig. 3), so daß das Unterwerkzeug 2 gefüllt bzw. aufgefüllt wird. Bei einer Blechhaltekraft F2 < F1 wird das Oberwerkzeug 5 gemäß Pfeil 12 angetrieben und die Vorform gegen das hydraulische Kissen 13 im Unterwerkzeug 2 zum endgültigen Bauteil umgeformt, wobei sich das Blech aufgrund der verminderten Blechhaltekraft F2 zwischen Niederhalter 7 und Unterwerkzeug 2 nachziehen kann.The metal sheet 10 is placed in the form of a plate in the opened tool and the hold-down device 7 and the lower tool 2 are moved together until the sheet 10 is firmly clamped. The clamping is done with a high sheet holding force F 1 . After the sheet metal has been clamped, compressed gas is fed into the space between the upper tool 5 and sheet metal 10 and the latter is preformed into the lower tool 2 under the action of the compressed gas, the preform being designed to be axially symmetrical. The preforming can take place with a high sheet holding force and then leads to a stretching of the sheet and thus to a stabilization. With a low sheet metal holding force, material can mainly be brought into the center of the component, which is recommended for complex components. After the preforming, pressurized water is supplied via the channel 3 according to the direction arrow 4 (FIG. 3), so that the lower tool 2 is filled or refilled. With a sheet holding force F 2 <F 1 , the upper tool 5 is driven according to arrow 12 and the preform against the hydraulic cushion 13 in the lower tool 2 is formed into the final component, the sheet being able to retract between the hold-down device 7 and the lower tool 2 due to the reduced sheet holding force F 2 .

Claims (9)

Verfahren zum hydromechanischen Tiefziehen von Metallblech, indem das Blech in der Trennebene zwischen einem Oberwerkzeug und einem Unterwerkzeug, von denen eines die Formkontur aufweist, flüssigkeitsdicht eingespannt und mittels des die Formkontur aufweisenden Werkzeugs gegen ein hydraulisches Kissen in dem anderen Werkzeug umgeformt wird, dadurch gekennzeichnet, daß das Blech mittels Druckgas in Umformrichtung beaufschlagt und vorgeformt und anschließend mittels des die Formkontur aufweisenden Werkzeugs in der gleichen Richtung endgeformt wird.Process for hydromechanical deep drawing of sheet metal, by placing the sheet in the parting line between one Upper tool and a lower tool, one of which the shape contour, clamped liquid-tight and by means of the tool having the shape contour against a hydraulic cushion in the other tool is formed, characterized in that the sheet pressurized in the forming direction and preformed and then by means of the shape contour having tool in the same direction becomes. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Blech mittels des Druckgases bei hoher Einspannkraft vorgeformt und zugleich gedehnt wird.A method according to claim 1, characterized in that the sheet by means of the compressed gas with high clamping force preformed and stretched at the same time. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Blech mittels des die Formkontur aufweisenden Werkzeugs bei verminderter Blechhaltekraft endgeformt wird.A method according to claim 1 or 2, characterized in that that the sheet metal by means of the shape contour Tool with final sheet metal holding force reduced becomes. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Blech bei niedriger Blechhaltekraft vorgeformt und bei höherer Blechhaltekraft endgeformt wird.Method according to one of claims 1 to 3, characterized in that that the sheet with low sheet holding force preformed and finished with a higher sheet holding force becomes. Vorrichtung zum hydromechanischen Tiefziehen von Metallblech mit einem Unterwerkzeug, einem Oberwerkzeug und einem Blechhalter, wobei das Oberwerkzeug die Formkontur aufweist, während das Unterwerkzeug einen Anschluß für ein Hydraulikmedium aufweist, dadurch gekennzeichnet, daß in den von dem Oberwerkzeug (5) und dem eingespannten Blech (10) begrenzten Raum (11) Druckgas zuführbar ist.Device for the hydromechanical deep drawing of sheet metal with a lower tool, an upper tool and a sheet metal holder, the upper tool forming the contour has, while the lower tool has a connection for a hydraulic medium, characterized in that that in the of the upper tool (5) and the clamped sheet (10) limited space (11) Compressed gas can be supplied. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß an dem Oberwerkzeug (5) wenigstens ein Druckgasanschluß (9) vorgesehen ist, der nach Einspannen des Blechs (10) aufsteuerbar ist.Device according to claim 4, characterized in that at least one compressed gas connection on the upper tool (5) (9) is provided, which after clamping the Sheet (10) can be opened. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß am Oberwerkzeug wenigstens eine Entlüftungsöffnung vorgesehen ist, die nach Abschluß des Vorformens aufsteuerbar ist.Device according to claim 5 or 6, characterized in that that at least one ventilation opening on the upper tool is provided after completion of preforming is taxable. Vorrichtung nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß die Blechhaltekraft (F1, F2) des Blechhalters (7) steuerbar oder regelbar ist.Device according to one of claims 5 to 7, characterized in that the sheet metal holding force (F 1 , F 2 ) of the sheet metal holder (7) can be controlled or regulated. Vorrichtung nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß der Druckaufbau in dem von dem Oberwerkzeug (5) und dem Blech (10) begrenzten Raum (11) zumindest teilweise durch die Bewegung des Oberwerkzeugs erfolgt.Device according to one of claims 5 to 8, characterized characterized in that the pressure build-up in that of the Upper tool (5) and the sheet (10) limited space (11) at least in part by the movement of the upper tool he follows.
EP00122059A 1999-10-29 2000-10-11 Method and device for hydromechanical deep drawing of metal sheet Withdrawn EP1095717A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999152105 DE19952105A1 (en) 1999-10-29 1999-10-29 Method and device for hydromechanical deep drawing of sheet metal
DE19952105 1999-10-29

Publications (2)

Publication Number Publication Date
EP1095717A2 true EP1095717A2 (en) 2001-05-02
EP1095717A3 EP1095717A3 (en) 2002-01-02

Family

ID=7927284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00122059A Withdrawn EP1095717A3 (en) 1999-10-29 2000-10-11 Method and device for hydromechanical deep drawing of metal sheet

Country Status (2)

Country Link
EP (1) EP1095717A3 (en)
DE (1) DE19952105A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10305654B3 (en) * 2003-02-12 2004-02-26 Thyssenkrupp Stahl Ag Machine tool used in external high pressure deformation of billets, especially in the manufacture of wall panels, comprises a holding-down device, form stamp and form hollow body with exchangeable inserts

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10164662B4 (en) * 2001-12-28 2006-06-29 Institut für Umformtechnik Universität Stuttgart Apparatus and method for hydromechanical deep drawing
DE10202791B4 (en) * 2002-01-25 2005-03-10 Audi Ag Method for hydro-mechanical forming of sheet metal parts and forming tool for carrying out the method
DE10313072B4 (en) * 2003-03-24 2006-02-09 Tower Automotive Hydroforming Gmbh & Co. Kg Method and apparatus for hydromechanical deep drawing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5956926A (en) * 1982-09-27 1984-04-02 Matsushita Electric Works Ltd Opposed liquid pressure forming method
DE19624036A1 (en) * 1996-06-17 1997-12-18 Matthias Prof Dr Ing Kleiner Deep drawing of metal sheet materials

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734277C2 (en) * 1997-08-07 2000-04-20 Forschungsges Umformtechnik Device for deep drawing a sheet using a pressure medium
DE19806761A1 (en) * 1998-02-18 1999-08-19 Volkswagen Ag Seat bowl for vehicle seat

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5956926A (en) * 1982-09-27 1984-04-02 Matsushita Electric Works Ltd Opposed liquid pressure forming method
DE19624036A1 (en) * 1996-06-17 1997-12-18 Matthias Prof Dr Ing Kleiner Deep drawing of metal sheet materials

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 160 (M-312), 25. Juli 1984 (1984-07-25) -& JP 59 056926 A (MATSUSHITA DENKO KK), 2. April 1984 (1984-04-02) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10305654B3 (en) * 2003-02-12 2004-02-26 Thyssenkrupp Stahl Ag Machine tool used in external high pressure deformation of billets, especially in the manufacture of wall panels, comprises a holding-down device, form stamp and form hollow body with exchangeable inserts
EP1447153A1 (en) * 2003-02-12 2004-08-18 ThyssenKrupp Stahl AG Machine tool for external high pressure forming of plates

Also Published As

Publication number Publication date
EP1095717A3 (en) 2002-01-02
DE19952105A1 (en) 2001-06-28

Similar Documents

Publication Publication Date Title
EP2303488B1 (en) Method and device for producing fine-blanked parts from a material strip
EP0704258B1 (en) Method for forming sheet metal
DE102008017728B4 (en) Method for material flow control during deep drawing of a workpiece
EP1097758B1 (en) Method for forming a large metal sheet, especially a vehicle body part
DE102012100230A1 (en) Apparatus and method for deep drawing of shell parts with integrated head and Zanzgenbeschnitt
DE19842750B4 (en) Method and production of deep-drawn hollow parts and drawing tool
DE10324244A1 (en) Process for the production of individualized outer skin sheet metal parts from series production of outer skin sheet metal parts for vehicles as well as outer skin sheet metal parts manufactured according to this process
DE19506067C1 (en) Aperture cutter for pressure moulded items
DE69909485T2 (en) DEVICE AND METHOD FOR SHAPING FLAT OBJECTS
DE102004054120B4 (en) A method of forming a large sheet metal blank to a molded part, such as an outer skin part of a motor vehicle body
DE10313072B4 (en) Method and apparatus for hydromechanical deep drawing
EP1095717A2 (en) Method and device for hydromechanical deep drawing of metal sheet
DE4436437C2 (en) Process for the hydrostatic shaping of, in particular, flat sheets of cold-formable metal and related device for carrying out the process
DE102004035758C5 (en) Method and device for producing a decorative preform
EP1268099B1 (en) Method for producing components using a flowable active medium and a forming tool
DE10347601B4 (en) Apparatus and method for hydraulic high pressure forming of a circuit board
DE3906958A1 (en) Method for manufacturing flat components
DE3840939A1 (en) Method for the production of flat components
DE69904207T2 (en) METHOD FOR PRODUCING CAN BODIES, AND FILLED AND CLOSED CONTAINERS OF CAN
DE10120880B4 (en) Process for the production of deep drawn parts
DE19819950A1 (en) Combination press
DE102006036048A1 (en) Mold-part deep-drawing method for progression tool, involves attaching sheet metal to inner horizontal drawing punch and outer horizontal drawing case, where rest flange of hollow body runs through deformed zone of draw ring
DE2507511C2 (en) Process for the production of sink unit covers with at least one basin by deep drawing and a device for carrying out the process
DE10026679A1 (en) Process for deep drawing sheet metal into molded parts comprises deforming in the region of the local shape contours using an active medium of a fluid stream directed against the shape contours
DE681196C (en) Method and device for pressing large, irregularly shaped sheet metal parts, e.g. Mudguards for cars

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT DE FR GB IT SE

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20020220

AKX Designation fees paid

Free format text: AT DE FR GB IT SE

17Q First examination report despatched

Effective date: 20030318

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20030729