WO2005077561A1 - Procede et dispositif pour la production d'un profile creux ferme - Google Patents

Procede et dispositif pour la production d'un profile creux ferme Download PDF

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Publication number
WO2005077561A1
WO2005077561A1 PCT/EP2005/001283 EP2005001283W WO2005077561A1 WO 2005077561 A1 WO2005077561 A1 WO 2005077561A1 EP 2005001283 W EP2005001283 W EP 2005001283W WO 2005077561 A1 WO2005077561 A1 WO 2005077561A1
Authority
WO
WIPO (PCT)
Prior art keywords
branch
hollow profile
counter
contour
stamp
Prior art date
Application number
PCT/EP2005/001283
Other languages
German (de)
English (en)
Inventor
Thomas Griskiewitz
Jörg KÖLLN
Jens Schult
Original Assignee
Daimlerchrysler Ag
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 Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Priority to CA002556070A priority Critical patent/CA2556070A1/fr
Priority to US10/589,201 priority patent/US20080034824A1/en
Publication of WO2005077561A1 publication Critical patent/WO2005077561A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
    • B21C37/29—Making branched pieces, e.g. T-pieces
    • B21C37/294—Forming collars by compressing a fluid or a yieldable or resilient mass in the tube
    • 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
    • B21D26/037—Forming branched tubes
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/28—Perforating, i.e. punching holes in tubes or other hollow bodies

Definitions

  • the invention relates to a method for producing a circumferentially closed hollow profile according to the preamble of patent claim 1 and a device therefor according to the preamble of patent claim 3.
  • a generic method or a generic device is known from DE 195 30 056 AI.
  • a branch is formed from a hollow profile blank by means of internal high pressure, which is supported by a receding counter-support during the molding of the cap of the branch.
  • the branch In the edge region of the cap, the branch has a large radius, so that it only rests with its central region on the end face of the counter-holder.
  • the support surface formed by the end face of the counter holder is enclosed by a collar-like, concave cutting edge. To a certain extent, the central area of the cap of the branch is thus in a depression in the counter-holder.
  • the forming pressure is increased considerably, as a result of which the radius in the edge region of the cap of the branch is reduced and this is pressed against the vertically protruding cutting edge.
  • the cutting edge cuts into a circumferential groove in the cap.
  • the counterhold is countered the shape of the branch is shifted towards the branch, whereby the cutting edge of the counter-holder completely cuts through the cap.
  • the counterholder is immersed in the opening of the branch thus created.
  • a calibration bead axially adjoining the cutting edge smoothes the inside wall of the branch. In order to produce this specially designed cutting edge, considerable effort is required.
  • this specially designed cutting edge is extremely heavily stressed by the increased internal pressure above the forming pressure, which leads to breakouts at the cutting edge relatively quickly during operation and thus results in a short service life of the counter-holder. Due to the described high susceptibility of the cutting edge to the high, fluidic and mechanical loads, a process-reliable separation of the cap of the branch is not possible in series production, since after the cutting edge has been damaged, the openings on the branch are punched only incompletely, and the component thus produced must be brought to the committee. The resulting costs are considerable, which in addition to the increased use of materials also include downtimes for retrofitting or repairing the counter holder.
  • the invention is based on the object of developing a generic method in such a way that the production of a hollow profile with secondary form elements and / or branches is made possible, in which a process-reliable separation of the cap of the secondary form element or the branch is achieved in a simple manner. Furthermore, an apparatus for performing the method is to be shown.
  • the object is according to the features of claim 1 with respect to the method and by the Features of claim 3 solved with respect to the device.
  • the invention is based on the surprising finding that the cap of the secondary form element and / or the branch can also be cleanly separated even with an internal high pressure which corresponds at most to the forming pressure for forming the hollow profile from the blank.
  • the caps are separated solely by a stroke of the counter-holding plunger which is opposite to the widening direction of the hollow profile.
  • the end face of the counter-holder stamp runs completely flat and therefore has no cutting or separating contours to be specially trained. This not only makes the counter-holder stamp much simpler, which considerably reduces the outlay on equipment; in addition, the end face and the separating contour of the counter-holder stamp become less susceptible to mechanical loads, which ensures a particularly long durability of the separating contour of the counter-holder stamp.
  • the internal high pressure does not have to exceed the forming pressure in order to separate the cap of the secondary form element and / or the branch, but the normal forming pressure or pressures below it is sufficient to cleanly separate the cap, what provides additional relief for the separating contour.
  • This also eliminates an excessive outlay on equipment, which is required at pressures that exceed the forming pressure, since the locking force for the hydroforming tool can only be applied by extremely powerful hydraulic cylinders and an extremely stable press frame.
  • the width of the annular gap between the wall of the bushing formed in the forming tool, in which the stamp is guided, and the circumference of the stamp should correspond approximately to the wall thickness of the secondary form element or the branch.
  • the secondary molding element and / or the branch after the separation process by means of a plunging movement of the counter-holder stamp into the opened secondary molding element and / or the branch means a calibration contour corresponding to the secondary form element or to the branch. This connects to the end of the stamp on the side facing away from the hollow profile.
  • the known circumferential bead is not required in order to calibrate the secondary form element or the branch. Rather, it can be omitted in a simple manner, which considerably simplifies the design of the counter-holder stamp.
  • the design of the counter-holder stamp is only to be adapted to the desired shape of the branch or the secondary form element.
  • a circumferential collar is formed on the counter-holder stamp, which immediately adjoins the calibration contour on the side facing away from the hollow profile. This ensures that the inhomogeneous material distribution that sometimes occurs due to calibration tion of the secondary form element or branch, which leads to an unevenly drawn-in edge of the branch or secondary form element, is made more uniform by axially pressing the collar onto the end edge of the secondary form element or branch obtained by the trimming.
  • the end edge Due to its flatness and due to the almost tolerance-free design, the end edge is of high quality and has a favorable effect on subsequent connection processes of the hollow profile on other components that have to be attached to the branch or the secondary form element, that the joining distance between the end edge and the component is even is large and thus a homogeneous and therefore particularly good long-term joint connection is achieved.
  • connection techniques such as welding, gluing or the like. can be used reliably.
  • the punch end which contains the separating contour, is frustoconical and has bevel surfaces facing the secondary form element or the branch.
  • the conical shape of the counter-holder plunger creates a radially circumferential sealing seat on the branch or counter-shaped element, as a result of which a pressure drop within the hollow profile is prevented in a highly advantageous manner. This means that several branches can be opened at the same time or one after the other with several punching counterholders arranged on the hollow profile, i.e. the cap can be separated from the branch without the internal high pressure in the hollow profile dropping and thus insufficient process reliability.
  • the end edge of the counter-holder stamp is rounded. Due to the rounding of the End edge, which forms the separating contour, additionally prevents the cap from being separated even while the branch or the secondary form element is being shaped. As a result, when the cap is later removed, the cap is not punched out sharply, but rather is torn out, which creates an undefined opening edge, which, however, is smoothed by the subsequent calibration and thus leads to the desired production result.
  • FIG. 1 is a side longitudinal section of a device according to the invention in the expansion phase of the hollow profile with a backing die
  • FIG. 3 is a side view in sections of a counter-holder stamp of a device according to the invention with a calibration contour adjoining the end of the stamp,
  • Fig. 4 in a side view in sections a counter-holder stamp of a device according to the invention with a circumferential collar.
  • FIG. 1 shows a device 1 which contains an internal high-pressure forming tool 2 and with which a circumferentially closed hollow profile 3, which is introduced into the internal high-pressure forming tool 2, with an auxiliary form element and / or a branch 4 serve.
  • the device 1 also contains a counter-holder stamp 5, which is integrated into the forming tool 2 so that it can be moved with little play.
  • a hollow profile blank 23 is placed within the internal high-pressure forming tool 2 under such a fluidic internal high-pressure Pi that it widens and conforms to the engraving 6 of the forming tool 2, in which the blank 23 is inserted.
  • hollow profile material is displaced in accordance with the internal high pressure Pi, which thereby forms a secondary molding element or the branch 4.
  • the branch 4 is supported during its formation by the end face 8 of the counter-holding plunger 5, the plunger 5 receding in the direction of the arrow as the length of the branch 4 increases.
  • two axial rams 9 of the device 1 are provided, which act on the hollow profile 3 in a sealing manner and push both ends 10 in the direction of the expansion area during the expansion in the direction of the arrow.
  • the drive of the counter-holding plunger 5 is reversed, so that it dips into the secondary form element or the branch 4 and thereby its cap 11 by means of a separating contour formed by the end edge 12 of the plunger 5 is separated out, forming a slug. This is done in the direction of the arrow with the force F. In the meantime, there is a pressure in the hollow profile 3 which corresponds to or is less than the forming pressure.
  • the end face 8 bordered by the end edge 12 of the stamp 5 runs continuously just gig.
  • the width of the annular gap 22 between the circumference 13 of the plunger 5 and the lead-through wall 14 is dimensioned such that it approximately corresponds to the wall thickness of the secondary molding element or the branch 4.
  • the cap 11 of the branch 4 is thus separated solely by a stroke of the counter-holding plunger 5 which is opposite to the widening direction of the hollow profile 3.
  • the counter-holder stamp 5 can, as can be seen from FIGS. 1 and 2, be of continuous cylindrical design. 3, the stamp end 15, which faces the branch 4 and contains the separating contour, can be frustoconical, with bevel surfaces 16 facing the secondary form element or the branch 4. The open branch 4 is sealed completely pressure-tight via these bevel surfaces 16. This avoids a drop in pressure within the hollow profile 3, so that branches 4 formed there at other points in the hollow profile 3 can be carried out sequentially and reliably by cap separation by means of a counter-holding plunger 5 arranged there.
  • a counter-holder stamp 17 additionally has a calibration contour 18, which adjoins the stamp end 19 on the side of the stamp 17 facing away from the hollow profile and is designed according to the contour of the secondary form element or the branch.
  • a circumferential collar 20 of the counter-holding punch 17 directly adjoins the calibration contour 18 on the side facing away from the hollow profile.
  • This collar 20 acts on the end face of the opening edge of the branch, whereby a uniform flatness of this end face is ensured.
  • the terminating edge 21 of the counter-holder stamp 17 can also be rounded in order to completely avoid that a circumferential predetermined breaking point is generated during the support function of the counter-holder stamp 17, which can burst open at least locally due to the prevailing internal high pressure, after which the further formation of the branch 4 no longer takes place can be done reliably.
  • the cap 11 can still be separated from the branch 4 with the rounded end edge 21 of the stamp end 19.

Landscapes

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

Abstract

La présente invention vise à permettre la production d'un profilé creux (3) au moyen d'éléments et/ou de jonctions secondaires de formation (4), dans lequel l'enveloppe (11) de l'élément et/ou la jonction secondaire de formation (4) peut être enlevé(e) d'une manière simple et fiable. A cet effet, l'enveloppe (11) de l'élément et/ou de la jonction secondaire de formation (4) est enlevé(e) sous pression interne élevée qui ne dépasse pas la pression de formation pour la production du profilé creux (3) à partir de l'ébauche, le retrait étant effectué par le seul levage du contre-moule (5, 17) qui agit dans le sens opposé de l'expansion de profil creux (3). La face (8) du contre-moule (5, 17) est une structure uniforme continue, et le bord d'extrémité (12, 21) du moule (5, 17) forme un contour de séparation. La largeur de l'espace annulaire (22) entre la paroi (14) du passage (7) produit par l'outil de formation (2) dans lequel le moule est guidé en déplacement et la circonférence du moule (13) correspond plus ou moins à l'épaisseur de paroi de l'élément et/ou la jonction secondaire de formation (4).
PCT/EP2005/001283 2004-02-13 2005-02-09 Procede et dispositif pour la production d'un profile creux ferme WO2005077561A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002556070A CA2556070A1 (fr) 2004-02-13 2005-02-09 Procede et dispositif pour la production d'un profile creux ferme
US10/589,201 US20080034824A1 (en) 2004-02-13 2005-02-09 Method and Device for Producing a Peripherally Closed Hollow Profile

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004007056A DE102004007056B4 (de) 2004-02-13 2004-02-13 Verfahren und Vorrichtung zur Herstellung eines umfänglich geschlossenen Hohlprofils
DE102004007056.3 2004-02-13

Publications (1)

Publication Number Publication Date
WO2005077561A1 true WO2005077561A1 (fr) 2005-08-25

Family

ID=34813323

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/001283 WO2005077561A1 (fr) 2004-02-13 2005-02-09 Procede et dispositif pour la production d'un profile creux ferme

Country Status (4)

Country Link
US (1) US20080034824A1 (fr)
CA (1) CA2556070A1 (fr)
DE (1) DE102004007056B4 (fr)
WO (1) WO2005077561A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103920744A (zh) * 2014-05-04 2014-07-16 唐山诚达建设集团有限公司 一种带支管管件一体加工设备

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006007224A1 (de) * 2006-02-15 2007-08-16 Sitech Sitztechnik Gmbh Verfahren und Vorrichtung zum Herstellen eines Ausschnittes oder Durchbruchs in der Wandung eines nach dem Innenhochdruck-Umformverfahren ausgebildeten Bauteils
CN106734496B (zh) * 2016-12-30 2018-06-01 宁波市江北保隆消声系统制造有限公司 一种汽车三通排气尾管的制造方法
CN109058631A (zh) * 2018-08-03 2018-12-21 浙江铜加工研究院有限公司 一种三通管生产方法
CN109433899B (zh) * 2018-12-06 2023-12-19 浙江嘉达机械制造有限公司 一种三通管自动成型机
CN114700388B (zh) * 2022-04-28 2023-09-08 太原理工大学 一种用于薄壁多通复合管件的成形方法

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Publication number Priority date Publication date Assignee Title
DE19530056A1 (de) * 1995-08-16 1997-02-20 Schaefer Maschbau Wilhelm Verfahren und Vorrichtung zum Herstellen T-förmiger bzw. mindestens eine domartige Abzweigung aufweisender Hohlkörper
JP2001286947A (ja) * 2000-03-31 2001-10-16 Kawasaki Hydromechanics Corp チューブハイドロフォーミングの膨出端部成形方法

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US2238037A (en) * 1936-02-14 1941-04-15 Jr Edward S Cornell Method and means of producing wholly integral cold wrought t's and like fittings
US3487668A (en) * 1966-07-12 1970-01-06 Western Electric Co Shaping and forming articles
DE19530055B4 (de) * 1995-08-16 2004-08-26 Schuler Hydroforming Gmbh & Co. Kg Verfahren zum Herstellen von doppelwandigen Durchbrechungen in Bauteilen nach dem Innenhochdruck-Umformverfahren
DE10029319C1 (de) * 2000-06-20 2001-05-31 Daimler Chrysler Ag Verfahren und Vorrichtung zur Herstellung von Durchführungen an Hohlprofilen
US6591648B1 (en) * 2002-06-24 2003-07-15 Greenville Tool & Die Company Method of stamping and piercing a tube
DE10328452B3 (de) * 2003-06-25 2004-12-09 Daimlerchrysler Ag Verfahren und Vorrichtung zur Erzeugung eines Loches am Außenumfang eines Hohlprofiles
DE10356535B3 (de) * 2003-12-04 2004-08-26 Daimlerchrysler Ag Vorrichtung zum Herstellen eines Hohlprofils
US7204113B1 (en) * 2006-09-29 2007-04-17 Gm Global Technology Operations, Inc. Punch for hydroforming die

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19530056A1 (de) * 1995-08-16 1997-02-20 Schaefer Maschbau Wilhelm Verfahren und Vorrichtung zum Herstellen T-förmiger bzw. mindestens eine domartige Abzweigung aufweisender Hohlkörper
JP2001286947A (ja) * 2000-03-31 2001-10-16 Kawasaki Hydromechanics Corp チューブハイドロフォーミングの膨出端部成形方法

Non-Patent Citations (1)

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Title
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 02 2 April 2002 (2002-04-02) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103920744A (zh) * 2014-05-04 2014-07-16 唐山诚达建设集团有限公司 一种带支管管件一体加工设备

Also Published As

Publication number Publication date
DE102004007056A1 (de) 2005-09-01
US20080034824A1 (en) 2008-02-14
DE102004007056B4 (de) 2006-02-09
CA2556070A1 (fr) 2005-08-25

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