EP0995512A2 - Méthode et dispositif pour étancher un profilé creux ou similaire pendant le formage à haute pression - Google Patents

Méthode et dispositif pour étancher un profilé creux ou similaire pendant le formage à haute pression Download PDF

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Publication number
EP0995512A2
EP0995512A2 EP99810889A EP99810889A EP0995512A2 EP 0995512 A2 EP0995512 A2 EP 0995512A2 EP 99810889 A EP99810889 A EP 99810889A EP 99810889 A EP99810889 A EP 99810889A EP 0995512 A2 EP0995512 A2 EP 0995512A2
Authority
EP
European Patent Office
Prior art keywords
stamp
space
sealing element
profile
active medium
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
EP99810889A
Other languages
German (de)
English (en)
Other versions
EP0995512A3 (fr
EP0995512B1 (fr
Inventor
Jörg Hein
Aslan Göger
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.)
3A Composites International AG
Original Assignee
Alcan Technology and Management Ltd
Alusuisse Lonza Services Ltd
Alusuisse Technology and Management Ltd
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
Priority claimed from DE19909949A external-priority patent/DE19909949B4/de
Application filed by Alcan Technology and Management Ltd, Alusuisse Lonza Services Ltd, Alusuisse Technology and Management Ltd filed Critical Alcan Technology and Management Ltd
Publication of EP0995512A2 publication Critical patent/EP0995512A2/fr
Publication of EP0995512A3 publication Critical patent/EP0995512A3/fr
Application granted granted Critical
Publication of EP0995512B1 publication Critical patent/EP0995512B1/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
    • B21D26/033—Deforming tubular bodies
    • B21D26/045—Closing or sealing means

Definitions

  • the invention relates to a method and an apparatus for forming a hollow profile or the like.
  • Workpiece by means of an internal high pressure generated by a flowable active medium in the sealed profile space of the hollow profile, whereby at least one sealing element from the active medium a receiving space of a stamp-like tool part is guided radially outwards.
  • DE 35 32 499 C1 describes a device for hydraulic Widening a pipe section by means of a Tube insertable cone-like cylindrical probe that by means of at least two spaced apart Sealing rings with the pipe section to be expanded Annulus forms, which is filled with pressure medium to expand becomes; the two sealing rings are each in an annular shape Receiving groove U-shaped cross section arranged in the probe and have in the initial state when the Probe into the tube at most the outside diameter of the Corresponding outer diameter. Before the expansion process begins they are used to seal the annular gap radial pressure between the probe and the pipe, the grooves through a to the pressure medium supply connected connecting line supplied becomes.
  • the pressure medium supply to the annulus occurs exclusively over at least one of the grooves and will controlled by a sealing ring serving as a valve body, the opening between the receiving groove and the annular space closes until it expands due to elastic expansion has achieved its sealing effect. That groove is in its edge adjacent to the annulus with at least one bevelled incision. If the pressure in the Annulus between the two seals increases the pipe wall widen in this area.
  • the profile space covering tool part added and the sealing element to one between the hollow profile and the one attached to it stamp-like tool part created. It can the active medium from the space for the sealing element in the Profile space can be initiated.
  • an insert between serves here Pressure line mouth and sealing element as an additional Wear protection. This deposit must consist of one wear-resistant material and can be loose or with the Sealing element to be firmly connected.
  • the sealing element can axially and / or radially biased.
  • stamp-like tool part a radial shoulder surface as a stop for a front edge of the designed as a single or multi-chamber profile has and on the circumference of an insertable in the profile space
  • at least one annular groove for the sealing element is provided, which is to the longitudinal axis of the stamp towards at least one feed space for the active medium spanned and can be lifted off from the feed space by this;
  • the stamp heel that can be inserted into the profile space is on the radially protruding shoulder surface added, which with a joint between the abutting front edge of the hollow profile limited to which this was designed as a sealing ring Allows the sealing element to be applied through the active medium.
  • the Ring or sealing groove another groove as a feed space for the active medium by at least one in the stamp add running channel to a source for the active medium is; if necessary, the further groove is an inner groove molded into the deepest of the ring or sealing groove and the latter is assigned radially.
  • the annular groove is as Shoulder groove shaped with an undercut Cross-sectional part and one as an open contact surface for the Sealing element trained section, above all when the stamp paragraph is a separate part of the approach Stamp is.
  • the annular sealing element is therefore on a Paragraph or shoulder of the stamp in the ring groove that extend also axially parallel over that shoulder surface can.
  • the active medium flows into the Inner groove under the sealing element and expands it, until it lies in front of that joint. Now flows in one configuration the active medium over the inner edge of the ring or Sealing groove - or through holes - in the workpiece on.
  • the holes can be arranged or the inside edge can be designed so that the active medium only in the Workpiece or the profile space flows when the sealing element the joint lies at these critical points.
  • sealing ring a band-like inner section with about this in Rib shaped center of cross section.
  • Rib shaped center of cross section By this stipulation a cross section is created that corresponds to that of a hat.
  • the central rib of this sealing ring is in Installation position on the one hand from a section of the stamp approach and on the other hand from an annular rib of the head part flanked.
  • the elastic seal adapts during calibration the changing shape of the hollow profile during the forming or the workpiece. Will the pressure in the workpiece again dismantled, the seal returns to its original position; The stamp and seal can be smoothly removed from the Workpiece are extended.
  • the end edge 14 of the hollow profile 10 has to strike the stamp 16 in a sealed manner.
  • the stamp 16 is provided with a radial shoulder surface 18 of an outer diameter d, to which a cylindrical stamp extension 20 of a smaller diameter d 1 is connected.
  • the height of the circumferential surface 22 of the cylindrical stamp shoulder 20 parallel to the longitudinal axis A of the stamp 16 is denoted by h in FIG. 1.
  • annular groove 24 in the peripheral surface 22 thereof molded to accommodate a sealing ring 26.
  • the annular groove 24 molded and the cross section of the Annular groove 24 of width b stepped inner groove 25 on both sides smaller width e. Go from this - in the illustrated Embodiment six - radial channels 28, the other at 29 in a central recess 30 of the stamp 16 mouth.
  • the cross section of this cylindrical in itself Recess 30 tapers near the inside of the stamp or stamp face 17 in an area 32 to be conical an axial or outflow channel 34.
  • an axial channel 34 usable pressure valve which in the embodiment of FIG. 3rd is indicated at 38. This is set so that it opens at the pressure under which the sealing ring 26 of the sealing edge abuts, and so the inlet of a larger volume flow or the lower loss inlet of the Active medium in the profile space 12 allows.
  • the Sealing ring 26 made of elastic material 26 which is changing Shape of the hollow profile 10. In this the Relieved of pressure, the sealing ring 26 goes into its initial position back into the ring groove 24 so that the sealing ring 26 with the stamp 16 again smoothly out of the profile space 12 can be extended.
  • a sealing ring 40 is inserted which has a band-like inner section 41, from the cross-sectional center of which a rib 44 chamfered at its edges 42 is formed; a narrow edge region of the inner portion 41 of the sealing ring 40 is inserted on the one hand into the undercut part of the shoulder groove 24 a and on the other hand overlapped by an axial ring rib 46 of the head part 19.
  • the installation or attachment of the schematically illustrated throttle valve 38 ensures that when the pressure in the profile 10 builds up, pressure is first generated on the sealing ring 40 before the internal pressure is built up in the profile 10; the response of the seal is guaranteed.
  • Fig. 5 also shows a two-part stamp 16 b from a head part 19 b and a separate cylindrical stamp extension 20 b , which is inserted into an insert space 48 of the head part 19 b .
  • the annular groove 24 of rectangular cross section receives the correspondingly designed sealing ring 26, which is partially covered by the side surface 49 of an annular edge 50 surrounding the insert space 48; the latter offers that shoulder surface 18.
  • the shape of the stamp 16 c corresponds approximately to that of the stamp 16 of FIG. 2, but the sealing ring 26 c rests on the peripheral surface 22, which is formed by an annular groove 24 c formed in the shoulder surface 18 parallel to the axis via the shoulder surface 18 is extended.
  • the sealing ring 26 c at the other end has a shoulder indentation 52 arranged on its outer edge, into which an edge rib 54 of a stamp cover 56 engages. The latter is screwed at 58 to the cylindrical stamp approach 20 c .
  • FIG. 7 shows a stamp 16 d with an axially continuous filling line 60 for the hollow profile 10 and a separate eccentric pressure line 62, which connects to the inner groove 25 with a radial section 64; this pressure line 62/64 is used to control the sealing ring 40 a .
  • an impact or wear insert made of metal or the like. Wear-resistant material is designated, which is provided in front of the mouth of a radial section 64 on the inner groove 25.
EP99810889A 1998-10-08 1999-10-01 Méthode et dispositif pour étancher un profilé creux ou similaire pendant le formage à haute pression Expired - Lifetime EP0995512B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19846467 1998-10-08
DE19846467 1998-10-08
DE19909949 1999-03-06
DE19909949A DE19909949B4 (de) 1998-10-08 1999-03-06 Vorrichtung und Verfahren zum Umformen eines Hohlprofils od. dgl. Werkstückes auf dem Wege des Innenhochdruck-Umformens

Publications (3)

Publication Number Publication Date
EP0995512A2 true EP0995512A2 (fr) 2000-04-26
EP0995512A3 EP0995512A3 (fr) 2001-04-11
EP0995512B1 EP0995512B1 (fr) 2003-10-22

Family

ID=26049387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99810889A Expired - Lifetime EP0995512B1 (fr) 1998-10-08 1999-10-01 Méthode et dispositif pour étancher un profilé creux ou similaire pendant le formage à haute pression

Country Status (3)

Country Link
EP (1) EP0995512B1 (fr)
AT (1) ATE252429T1 (fr)
ES (1) ES2209372T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1208926A2 (fr) * 2000-11-15 2002-05-29 Schuler Hydroforming GmbH & Co. KG Dispositif pour l'hydroformage d'une pièce creuse
EP1275448A3 (fr) * 2001-07-14 2004-01-02 Benteler Automobiltechnik GmbH & Co. KG Dispositif d' obturation d' une extrémité d' un profilé tubulaire creux dans un outil de formage à haute pression interne
EP1475168A1 (fr) * 2003-03-12 2004-11-10 Forschungsgesellschaft Umformtechnik m.b.H. Dispositif d'obturation des extrémités d'un profilé creux à utiliser dans un procédé de formage à haute pression interne
CN114618933A (zh) * 2022-03-01 2022-06-14 哈尔滨工业大学（威海） 一种用于管材冲压变形工艺的组合式充气密封方法及装置
CN117619984A (zh) * 2024-01-25 2024-03-01 维格斯(上海)流体技术有限公司 一种不锈钢管加工用水涨成型机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1245164A (fr) * 1959-01-09 1960-11-04 Procédé de fabrication de tubes ronds et dispositif pour l'exécution de ce procédé
US3625040A (en) * 1969-08-06 1971-12-07 Koppy Tool Corp Method and apparatus for forming articles from a tubular blank
JPS57165134A (en) * 1981-04-03 1982-10-12 Hitachi Ltd Hydraulic bulge working device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1245164A (fr) * 1959-01-09 1960-11-04 Procédé de fabrication de tubes ronds et dispositif pour l'exécution de ce procédé
US3625040A (en) * 1969-08-06 1971-12-07 Koppy Tool Corp Method and apparatus for forming articles from a tubular blank
JPS57165134A (en) * 1981-04-03 1982-10-12 Hitachi Ltd Hydraulic bulge working device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 005 (M-184), 11. Januar 1983 (1983-01-11) -& JP 57 165134 A (HITACHI SEISAKUSHO KK), 12. Oktober 1982 (1982-10-12) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1208926A2 (fr) * 2000-11-15 2002-05-29 Schuler Hydroforming GmbH & Co. KG Dispositif pour l'hydroformage d'une pièce creuse
EP1208926A3 (fr) * 2000-11-15 2003-07-09 Schuler Hydroforming GmbH & Co. KG Dispositif pour l'hydroformage d'une pièce creuse
EP1275448A3 (fr) * 2001-07-14 2004-01-02 Benteler Automobiltechnik GmbH & Co. KG Dispositif d' obturation d' une extrémité d' un profilé tubulaire creux dans un outil de formage à haute pression interne
EP1475168A1 (fr) * 2003-03-12 2004-11-10 Forschungsgesellschaft Umformtechnik m.b.H. Dispositif d'obturation des extrémités d'un profilé creux à utiliser dans un procédé de formage à haute pression interne
CN114618933A (zh) * 2022-03-01 2022-06-14 哈尔滨工业大学（威海） 一种用于管材冲压变形工艺的组合式充气密封方法及装置
CN117619984A (zh) * 2024-01-25 2024-03-01 维格斯(上海)流体技术有限公司 一种不锈钢管加工用水涨成型机
CN117619984B (zh) * 2024-01-25 2024-05-07 维格斯(上海)流体技术有限公司 一种不锈钢管加工用水涨成型机

Also Published As

Publication number Publication date
EP0995512A3 (fr) 2001-04-11
ES2209372T3 (es) 2004-06-16
ATE252429T1 (de) 2003-11-15
EP0995512B1 (fr) 2003-10-22

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