EP0845312B1 - Outil pour formage à haute pression utilisable avec flexibilité - Google Patents

Outil pour formage à haute pression utilisable avec flexibilité Download PDF

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Publication number
EP0845312B1
EP0845312B1 EP97121023A EP97121023A EP0845312B1 EP 0845312 B1 EP0845312 B1 EP 0845312B1 EP 97121023 A EP97121023 A EP 97121023A EP 97121023 A EP97121023 A EP 97121023A EP 0845312 B1 EP0845312 B1 EP 0845312B1
Authority
EP
European Patent Office
Prior art keywords
tool
die
sheet metal
pressure
stamp
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
EP97121023A
Other languages
German (de)
English (en)
Other versions
EP0845312A1 (fr
Inventor
Klaus Prof. Dr.-Ing. Siegert
Aribert Prof. Dr.-Ing. Habil. Schwager
Manfred Dipl.-Ing. Breckner
Ulrich Dipl.-Ing. Hermann (Fh)
Ralf Dipl.-Ing. Rieger
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.)
Forschungsgesellschaft Umformtechnik mbH
Original Assignee
Forschungsgesellschaft Umformtechnik mbH
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 Forschungsgesellschaft Umformtechnik mbH filed Critical Forschungsgesellschaft Umformtechnik mbH
Publication of EP0845312A1 publication Critical patent/EP0845312A1/fr
Application granted granted Critical
Publication of EP0845312B1 publication Critical patent/EP0845312B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D26/023—Deforming sheet bodies including an additional treatment performed by fluid pressure, e.g. perforating
    • 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
    • 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

Definitions

  • the invention relates to a flexible tool for hydroforming a sheet according to the generic term of Claim 1.
  • EP 0 484 789 A1 discloses a method for Making a breakthrough in the wall of an as Hollow body trained workpiece.
  • the Cavity of the workpiece inserted in a mold with an active medium up to an internal pressure acts on the cutting of the workpiece wall along one edge of one in the mold existing formation causes.
  • the invention has for its object a flexible applicable tool for hydroforming a sheet develop with which either a combination of High pressure forming and / or cutting processes conventional forming with a stamp is possible is.
  • the flexible tool for hydroforming a Sheet metal is in an upper part of the tool in which one Die is included, and a lower tool part in the a pressure chamber and a pressure medium supply are formed are divided, with the sheet between the two Tool parts can be clamped pressure-tight and under the Influence of what can be introduced into the pressure chamber Pressure medium can be molded onto the die.
  • the die Stamp there is an axially movable in the die Stamp arranged with the sheet metal in some areas supportable, formable, cutable and / or out of the tool is ejectable.
  • Mold inserts are used to which the sheet is placed the influence of the first stamp in some areas is malleable.
  • the sheet is according to that Contour of the die and / or the arrangement and training of the stamp and / or the mold inserts deformable and / or lochbar.
  • the one in the upper part of the tool towards the sheet Arranged die has a for the production of Characteristics or for the calibration of radii Form element with a defined height, the Stamp is shortened by the height of the shaped element.
  • the Stamp path of the stamp can be integrated once Position measuring systems or via spacer rings under one directly pistons installed in the die holding plate or be limited.
  • stamps and cylinders can be used in one of 90 Degrees different angle to the sheet surface his.
  • a mold insert can be arranged in the high pressure room.
  • an axially movable second stamp can be arranged with which the sheet can be cut.
  • the pressure intensifier used to generate the high pressure, the via high pressure holes with the pressure chamber is directly in the lower part of the tool arranged and its push rod with that to the pressure chamber leading high pressure bore directly connected. Thereby the cost of the high pressure system can be significant be reduced.
  • the tool for hydroforming has gem. 1 and 2 an upper tool part 1 and a lower tool part 2. Between these two tool halves 1 and 2, the Sheet metal board 3 inserted. Located in the lower part 2 of the tool a pressure chamber 4, which is connected via a high-pressure bore 5 is connected to the high pressure system.
  • a die 6 is in the upper tool part 1 arranged with an axially displaceable punch 7.
  • the Surface 6a of the die 6 points in the direction of the sheet 3 the form elements to be produced with the height h.
  • the Stamp 7 is the height h of the shaped element Surface 6a, set back or shortened.
  • the stamp 7 now serves according to the requirements and its training either to punch the formed Sheet 3 under high pressure P or after opening both Tool halves 1 and 2 for ejecting the formed Part.
  • the stamp carries out 7 under High pressure P either a positive stroke + H towards of the sheet 3 and / or a negative stroke -H in the opposite direction.
  • the stamp 7 serves as Ejector, ejection takes place after opening the Tool halves 1 and 2 without pressure by a positive Stamp stroke in the direction of the sheet 3.
  • the stamp 6 acts as a punch. Through a negative return stroke -H in the direction of the arrow was caused by the High pressure punched the sheet.
  • the stamp can also be designed as a shaped stamp be and with its stamp surface with the towards 6-wire recessed surface facing the sheet metal Complete die 6. After hydroforming can now an axial feed movement of the stamp 7 around the positive stroke, so that the sheet 3 in one second forming stage by the punch 7 under high pressure P is reshaped.
  • the stamp 7 in the die 6 even further reset so that when hydroforming a additional shaped element is formed.
  • This is also in two stages possible, i.e. closes in the first stage the stamp 7 with the die 6 and after Hydroforming retracted and in the second Forming stage is the sheet 3 in the resulting drawn free space.
  • stamp 7 over the surface 6a of the die 6 into the forming space protrudes into it and surface elements on its stamp surface 7a to produce the desired surface contour 3 shows by hydroforming the sheet 3 lies on the surface 6a of the die and on the stamp surface 7a of the stamp 7 (dashed line). It is also here possible, the sheet 3 with high pressure in a second Forming stage through a corresponding positive stroke + H of the stamp 7 to further shape.
  • the die 6 has a plane on the sheet adjacent surface 6a without a shaped element.
  • the punch 7 is also axially movable arranged.
  • the stamp 7 is under high pressure deep drawing of the sheet 3 in the direction of the pressure chamber 4th
  • FIG. 5 An embodiment variant in which for multiple Punch the sheet 3 or to insert several additional Form elements on the piston rod 8 of the cylinder 9 shows a plurality of stamps 7.
  • FIG. 5 The stamp 7 are on the clamping plates 8 with the Piston rod 9 of the perforated cylinder 10 connected. Guided the stamp 7 in the die 6.
  • FIGS. 6a to 6c A combination of the tool according to the invention with a movable die 7, the one in the middle arranged, also axially displaceable punch 7.1, shows FIGS. 6a to 6c.
  • a shaped element 11 is arranged in the lower part of the tool 2, a shaped element 11 is arranged. 6a represents the starting position.
  • the form stamp 7 and Punch 7.1 are both by dimension h reset.
  • Fig. 7 the entire device for hydroforming is shown shown. Directly on the lower part 1 of the tool Spacer 12 of the hydraulic cylinder 13 flanged. From this the pressure on a push rod 14 and the pressure supply 5 to the pressure chamber 4 in the lower part of the tool 2 headed.
  • the stamp path is via a path measuring system 15 regulated or controlled.
  • Bs are advantageously two mutually independent perforated cylinders L1 and L2 provided so that independently perforated or can be reshaped with the respective stamp.
  • the Hole cylinders L1 and L2 are on a cylinder holding plate 16 attached.
  • FIG. 8 Another way to control the stamp path is shown in Fig. 8.
  • the path is limited via a spacer plate, which can be selected according to the Direction of stroke arranged above or below the clamping plate becomes.
  • the oil supply to the oil supply lines becomes corresponding regulated.
  • the Perforated cylinder 10 and the cylinder holding plate 16 are omitted.
  • the piston 18 is guided directly in the upper part 1 of the tool.
  • a sealing flange 19 is provided over the piston 18 under the piston 18 is a via a clamping plate 20
  • Spacer plate 17 arranged so that between the Clamping plate 20 and the die 6 a distance accordingly of the required stroke is available. In this room leads the second oil supply line 22.
  • the first oil supply line 21 is fed to the top of the piston 18.
  • the stamp can thereby as a form stamp, punch stamp or ejector be trained. Both in training as Form stamps as well as training as ejectors can be in this another punch must be arranged in the center. Due to the different design options and Interchangeability of the individual elements becomes one versatile application possible.
  • the coupling or integration of the hydraulic cylinder significantly reduces the cost of the entire tool.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (8)

  1. Outil à utilisations multiples pour l'hydroformage d'une tôle (3), avec une partie supérieure d'outil (1) recevant la matrice (6) et une partie inférieure d'outil (2) dans laquelle est formé un espace sous pression (4) avec une arrivée de fluide sous pression (5), la tôle (3) pouvant être fixée de manière étanche à la pression entre les deux parties d'outil (1, 2) et formée contre la matrice (6) sous l'action du fluide sous pression amené dans l'espace sous pression (4),
    caractérisé en ce que
    il est prévu dans la matrice (6) au moins un premier poinçon (7) avec lequel la tôle (3) peut être soutenue dans certaines zones, formée, découpée et/ou éjectée de l'outil,
    il est prévu dans l'espace sous pression (4) des inserts de formage sur lesquels la tôle peut être formée dans certaines zones sous l'action du premier poinçon (7),
    et dans lequel la tôle (3) peut être déformée et/ou perforée au choix selon le contour de la matrice (6) et/ou la disposition et la conformation du poinçon (7) et/ou les inserts de formage.
  2. Outil à utilisations multiples selon la revendication 1, caractérisé en ce qu'il est prévu dans le premier poinçon (7) un deuxième poinçon (7.1) mobile dans le sens axial qui permet de découper la tôle (3).
  3. Outil à utilisations multiples selon la revendication 1 ou 2, caractérisé en ce que la matrice (6) disposée dans la direction de la tôle (3) possède un élément de formage servant à produire des marques embouties ou à calibrer des rayons et ayant une hauteur (h), et en ce que le premier poinçon (7) est raccourci de la hauteur (h) de l'élément de formage.
  4. Outil à utilisations multiples selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la course du premier poinçon (7) est limitée ou ajustée par une plaque d'écartement (16).
  5. Outil à utilisations multiples selon l'une quelconque des revendications 1 à 4, caractérisé en ce que pour perforer la tôle en plusieurs endroits ou introduire plusieurs éléments de formage supplémentaires, il est prévu sur la tige de piston (9) du vérin (10) plusieurs poinçons (7) formant des poinçons de coupe ou des poinçons de formage.
  6. Outil à utilisations multiples selon la revendication 5, caractérisé en ce que les poinçons (7) et les cylindres de perçage (10) sont inclinés selon un angle (α) défini par rapport à la tôle (3).
  7. Outil à utilisations multiples selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la surface de la partie d'outil inférieure (2) orientée en direction de la tôle (3) présente au niveau de l'espace sous pression (4) des éléments de formage orientés à l'opposé de la tôle (3) sous la forme de rayons ou de chanfreins annulaires, afin de produire simultanément lors du perçage un soyage ou un élément formé similaire.
  8. Outil à utilisations multiples selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le vérin hydraulique (13) servant à produire la haute pression, qui communique par des alésages sous haute pression (5) avec l'espace sous pression (4), est directement placé dans la partie d'outil inférieure (2) et sa tige de poussée (14) est directement reliée à l'aléiage sous haute pression (5) menant à l'espace sous pression (4).
EP97121023A 1996-12-02 1997-11-29 Outil pour formage à haute pression utilisable avec flexibilité Expired - Lifetime EP0845312B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19649629 1996-12-02
DE19649629A DE19649629C2 (de) 1996-12-02 1996-12-02 Flexibel einsetzbares Werkzeug zum Hydroumformen eines Bleches

Publications (2)

Publication Number Publication Date
EP0845312A1 EP0845312A1 (fr) 1998-06-03
EP0845312B1 true EP0845312B1 (fr) 2003-04-09

Family

ID=7813204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97121023A Expired - Lifetime EP0845312B1 (fr) 1996-12-02 1997-11-29 Outil pour formage à haute pression utilisable avec flexibilité

Country Status (4)

Country Link
EP (1) EP0845312B1 (fr)
AT (1) ATE236745T1 (fr)
DE (2) DE19649629C2 (fr)
ES (1) ES2196244T3 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10016804B4 (de) * 2000-04-05 2004-11-11 Thyssenkrupp Stahl Ag Verfahren und Vorrichtung zum Herstellen von Bauteilen aus einer tiefziehbaren Platine
DE10149543A1 (de) * 2001-10-08 2003-04-30 Konrad Schnupp Verfahren und Vorrichtung zum Umformen von flächigen, metallischen Werkstücken
DE10332509B3 (de) * 2003-07-17 2004-09-02 Daimlerchrysler Ag Verfahren und Vorrichtung zur Herstellung eines mit Löchern versehenen Werkstücks
DE10347601B4 (de) * 2003-10-14 2011-01-27 Benteler Automobiltechnik Gmbh Vorrichtung und Verfahren zum hydraulischen Hochdruckumformen einer Platine
DE10349879B3 (de) * 2003-10-25 2004-08-26 Daimlerchrysler Ag Verfahren und Vorrichtung zum Trennen eines nach dem Innenhochdruck-Umformverfahren hergestellten Hohlkörper
DE10351400B4 (de) * 2003-11-04 2005-10-06 Umformtechnik Alfred Burggraf Gmbh Schüttgutsortierer
DE102010052739B4 (de) 2010-11-26 2023-12-28 Cellcentric Gmbh & Co. Kg Verfahren und Vorrichtung zur Herstellung von Bauelementen für eine elektrochemische Zelle, insbesondere eine Brennstoffzelle, oder einen elektrochemischen Energiespeicher
CN109482718B (zh) * 2018-09-21 2021-01-26 北京长城华冠汽车科技股份有限公司 开孔方法
CN113860726A (zh) * 2021-09-02 2021-12-31 英特派铂业股份有限公司 一种玻纤漏板底板一体成型制备方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4263375A (en) * 1978-12-26 1981-04-21 The Boeing Company Superplastically formed titanium structure
JPS5865523A (ja) * 1981-10-14 1983-04-19 Aida Eng Ltd 液圧絞り装置
JPS61245921A (ja) * 1985-04-23 1986-11-01 Mitsubishi Heavy Ind Ltd 板材の液圧絞り成形方法
DE4035625A1 (de) * 1990-11-09 1992-05-14 Audi Ag Verfahren zum herstellen eines durchbruches in der wandung eines als hohlkoerper ausgebildeten werkstueckes und werkzeug zur durchfuehrung des verfahrens
DE4322063C2 (de) * 1993-07-02 1999-07-15 Schaefer Hydroforming Gmbh Verfahren und Vorrichtung zum Ausschneiden eines Ausschnittes aus einer Wandung eines nach dem Innenhochdruck-Umformverfahren hergestellten Hohlkörpers
DE4434799A1 (de) * 1994-09-29 1996-04-04 Smg Sueddeutsche Maschinenbau Verfahren und Vorrichtung zum Umformen von Metallblech
DE19535870C2 (de) * 1995-07-24 2002-07-11 Blz Gmbh Verfahren zum Herstellen von schalenförmigen Hohlstrukturen aus gedoppelten Blechzuschnitten mittels Innenhochdruckumformen

Also Published As

Publication number Publication date
ATE236745T1 (de) 2003-04-15
ES2196244T3 (es) 2003-12-16
DE19649629C2 (de) 1999-01-07
EP0845312A1 (fr) 1998-06-03
DE19649629A1 (de) 1998-06-04
DE59709768D1 (de) 2003-05-15

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