EP0845312A1 - 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
EP0845312A1
EP0845312A1 EP97121023A EP97121023A EP0845312A1 EP 0845312 A1 EP0845312 A1 EP 0845312A1 EP 97121023 A EP97121023 A EP 97121023A EP 97121023 A EP97121023 A EP 97121023A EP 0845312 A1 EP0845312 A1 EP 0845312A1
Authority
EP
European Patent Office
Prior art keywords
pressure
stamp
tool
punch
die
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.)
Granted
Application number
EP97121023A
Other languages
German (de)
English (en)
Other versions
EP0845312B1 (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 and is used in particular in the processing of single or double sheet metal blanks.
  • Numerous solutions for the internal high pressure forming of rotationally symmetrical hollow bodies of the metal sheets connected to one another at the edges are already known.
  • DE 44 34 799 A1 shows the forming of a sheet metal plate under the action of a hydraulic pressure medium.
  • the tool is divided into an upper and lower tool.
  • the circuit board is arranged in the parting plane.
  • the high-pressure chamber is arranged in the lower tool and the mold contour in the upper tool. Due to the hydraulic pressure, the board is formed until it is fully in contact with the contour of the mold.
  • a solution for punching with internal pressure is described in DE 43 22 063 C1, the cutout being cut out immediately after the internal high-pressure forming. With a maximum internal pressure, pre-cutting takes place down to a residual wall thickness and with a reduced internal pressure, the final cutting.
  • a disadvantage of all known methods is that only one method variant can be implemented with the known
  • the tool for hydroforming has gem. 1a and 1b an upper tool part 1 and a lower tool part 2.
  • the metal plate 3 is inserted between these two tool halves 1 and 2.
  • a high-pressure chamber 4 which is connected to the high-pressure system via a high-pressure bore 5.
  • a die 6 with an axially displaceable punch 7 is arranged in the upper tool part 1.
  • the surface 6a of the die 6 has the shape elements to be produced with the height h in the direction of the sheet 3.
  • the stamp 7 is set back or shortened by the height h of the shaped element of the surface 6a.
  • the stamp surface 7a of the stamp 7 lies in one plane with the surface 6a, ie the highest point of the shaped element, the die 6.
  • the sheet 3 has completely touched the surface 6a of the Die 6 and applied to the stamp surface 7a of the stamp 7.
  • the punch 7 is used according to the requirements and its design either for punching the formed sheet 3 under internal pressure p or after opening both tool halves 1 and 2 for ejecting the formed part.
  • the punch 7 carries out either a positive stroke + H in the direction of the sheet 3 and / or a negative stroke -H in the opposite direction under internal pressure P.
  • the punch 7 serves as an ejector, the ejection takes place after opening the tool halves 1 and 2 without pressure by a positive punch stroke in the direction of the sheet 3.
  • the punch 6 functions as a punch. Due to a negative return stroke -H in the direction of the arrow, the sheet was perforated by the internal pressure.
  • the stamp 7 is designed as a shaped stamp. It also closes according to Fig. 2a from internal high pressure forming with its stamp surface 7a with the recessed surface 6a of the die 6 pointing in the direction of the sheet 3.
  • FIG. 3 A further embodiment variant, in which the stamp 7 projects beyond the surface 6a of the die 6 into the forming space and contains surface elements on its stamp surface 7a for producing the desired surface contour, is shown in FIG. 3.
  • the sheet metal 3 lies on the surface by means of internal high pressure forming 6a of the die and on the stamp surface 7a of the stamp 7 (broken line). It is also possible to further shape the sheet 3 with internal pressure in a second forming step by means of a corresponding positive stroke + H of the punch 7.
  • the die 6 has a flat surface 6a lying against the sheet metal without a shaped element.
  • the punch 7 is also axially movable in the die 6.
  • the stamp 7 causes the sheet 3 to be deep-drawn in the direction of the high-pressure chamber 4 under internal pressure.
  • FIG. 5 An embodiment variant, in which several punches 7 are arranged for the multiple punching of the sheet or for the introduction of several additional shaped elements on the piston rod 8 of the cylinder 9, FIG. 5.
  • the punches 7 are connected to the piston rod 9 of the perforated cylinder 10 via clamping plates 8.
  • the punch 7 is guided in the die 6.
  • FIGS. 6a to 6c A combination of the tool according to the invention with a displaceable die 7, which has a centrally arranged, also axially displaceable punch 7.1, is shown in FIGS. 6a to 6c.
  • a shaped element 11 is arranged in the lower tool part 2.
  • 6a shows the starting position.
  • the die 7 and the punch 7.1 are both set back by the dimension h.
  • the punch 7 In the first forming stage according to Fig. 6b is performed with the punch 7 with a positive stroke + H (Fig. 6a) at an internal pressure of approximately 300 bar.
  • the sheet metal 3 forms freely in the high-pressure forming space 4.
  • the punch 7 is slowly moved back into the end position with a simultaneously increased internal pressure.
  • the increased internal pressure can be a multiple of the lower pressure and depends on the material and the surface contour of the sheet to be produced. This is followed by punching with the punch 7.1 under internal pressure (Fig. 6c).
  • the stamp path is regulated or controlled via a path measuring system 15.
  • Two mutually independent perforated cylinders L1 and L2 are advantageously provided so that perforations can be made independently of one another or formed with the respective punch.
  • the perforated cylinders L1 and L2 are attached to a cylinder holding plate 16.
  • Another possibility for controlling the stamp path is shown in FIG. 8. The path is limited by a spacer plate, which can be arranged either above or below the clamping plate depending on the stroke direction.
  • the oil supply to the oil supply lines is regulated accordingly.
  • the perforated cylinders and the cylinder holding plate 16 can be omitted.
  • the piston 18 is guided directly in the upper part 1 of the tool.
  • a sealing flange 19 is provided above the piston 18 and a spacer plate 17 is arranged below the piston 18 via a clamping plate 20 such that a distance corresponding to the required stroke is present between the clamping plate and the die 6.
  • the second oil supply line 22 leads into this space.
  • the first oil supply line 21 is supplied at the top of the piston 18. In the starting position, the piston 18 strikes the sealing flange. When pressure is applied via the first oil supply line 21, the piston 18 is moved downward with the plunger 7 (positive stroke) until the clamping plate 20 strikes the die 6.
  • the return stroke takes place via the second oil feed line 22.
  • the stroke can be adjusted by the thickness of the spacer plate 17.
  • punching with a negative stroke the spacer plate is moved and strikes the die 6 in the starting position and is moved in the direction of the sealing flange 19.
  • This design according to the invention ensures a simple construction and a small size.
  • the stamp can be designed as a stamp, punch or ejector.
  • a further punch can be arranged in the center both in the form of a form stamp and in the form of an ejector.
  • the various design options and the interchangeability of the individual elements make a 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)
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 true EP0845312A1 (fr) 1998-06-03
EP0845312B1 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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1529575A2 (fr) * 2003-11-04 2005-05-11 Umformtechnik Alfred Burggraf GmbH Dispositif de tri de matériau en vrac
CN109482718A (zh) * 2018-09-21 2019-03-19 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

Families Citing this family (6)

* 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
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

Citations (5)

* 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
EP0484789A1 (fr) * 1990-11-09 1992-05-13 Audi Ag Procédé et outil pour la production des trous dans la paroi d'un corps creux
DE4434799A1 (de) * 1994-09-29 1996-04-04 Smg Sueddeutsche Maschinenbau Verfahren und Vorrichtung zum Umformen von Metallblech

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE19535870C2 (de) * 1995-07-24 2002-07-11 Blz Gmbh Verfahren zum Herstellen von schalenförmigen Hohlstrukturen aus gedoppelten Blechzuschnitten mittels Innenhochdruckumformen

Patent Citations (5)

* 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
EP0484789A1 (fr) * 1990-11-09 1992-05-13 Audi Ag Procédé et outil pour la production des trous dans la paroi d'un corps creux
DE4434799A1 (de) * 1994-09-29 1996-04-04 Smg Sueddeutsche Maschinenbau Verfahren und Vorrichtung zum Umformen von Metallblech

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 94 (M - 574) 25 March 1987 (1987-03-25) *
PATENT ABSTRACTS OF JAPAN vol. 7, no. 157 (M - 227) 9 July 1983 (1983-07-09) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1529575A2 (fr) * 2003-11-04 2005-05-11 Umformtechnik Alfred Burggraf GmbH Dispositif de tri de matériau en vrac
EP1529575A3 (fr) * 2003-11-04 2005-11-09 Umformtechnik Alfred Burggraf GmbH Dispositif de tri de matériau en vrac
CN109482718A (zh) * 2018-09-21 2019-03-19 北京长城华冠汽车科技股份有限公司 开孔方法
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

Also Published As

Publication number Publication date
ES2196244T3 (es) 2003-12-16
DE19649629A1 (de) 1998-06-04
DE19649629C2 (de) 1999-01-07
ATE236745T1 (de) 2003-04-15
DE59709768D1 (de) 2003-05-15
EP0845312B1 (fr) 2003-04-09

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