WO2005068102A1 - Dispositif et procede pour produire un profile en coque et un profile creux au moyen de moulage par haute pression interne - Google Patents

Dispositif et procede pour produire un profile en coque et un profile creux au moyen de moulage par haute pression interne Download PDF

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Publication number
WO2005068102A1
WO2005068102A1 PCT/EP2004/014267 EP2004014267W WO2005068102A1 WO 2005068102 A1 WO2005068102 A1 WO 2005068102A1 EP 2004014267 W EP2004014267 W EP 2004014267W WO 2005068102 A1 WO2005068102 A1 WO 2005068102A1
Authority
WO
WIPO (PCT)
Prior art keywords
hollow
tool
shell profile
notching
section
Prior art date
Application number
PCT/EP2004/014267
Other languages
German (de)
English (en)
Inventor
Kai-Uwe Dudziak
Uwe Hardtke
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 CA002553622A priority Critical patent/CA2553622A1/fr
Publication of WO2005068102A1 publication Critical patent/WO2005068102A1/fr

Links

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
    • 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
    • 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
    • B21D26/035—Deforming tubular 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
    • B21D26/033—Deforming tubular bodies
    • B21D26/047—Mould construction
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods

Definitions

  • the invention relates to a device for producing a hollow or shell profile according to the preamble of claim 1 and a method therefor according to the preamble of claim 6.
  • contoured hollow profiles or half-shells are produced from superimposed surfaces (in the so-called "blank expansion") or pipe blanks by sealing the sheets or pipe blanks in a die of an IHU tool and using an introduced fluid with a corresponding high pressure to deform the
  • the process of hydroforming is used particularly in the manufacture of frame structural components in the automotive sector, for example body panels.
  • Such frame structure components must be connected to other surrounding components.
  • flanges are generally provided at the ends of the components for connection to the surrounding components, in order to enable a corresponding connection with other components, for example via spot welding.
  • components manufactured by means of hydroforming are subsequently subjected to further processing steps such as cutting and bending.
  • the hollow or shell profile produced must be deflected to the desired length in a separate work step. While flat cut contours can still be produced by a simple saw cut running transversely to the axial / longitudinal direction of the hollow or shell profile, cut contours running in three-dimensional space for flange surfaces, which occur particularly when frame structure components are used in body construction, have to be carried out at great expense Laser or plasma cutting can be produced.
  • the flanges are then produced by subsequent bending of the pieces of material or extensions still remaining on the workpiece.
  • a device In order to carry out a cutting in an IHU tool, a device is proposed in the generic EP 100 43 81 A2, which includes die plates with cutting edges integrated in the tool and a plurality of support punches axially adjacent to them, which include both the die plates and the punches - Are provided circumferentially at one end of the hollow profile blank to be formed. The end of the blank protrudes from the IHU tool. During the expansion of the blank by introducing the pressurized fluid, the circumference of the blank lies against the cutting edges.
  • the hollow profile blank has a small circumferential gap, so that by continuing to widen the end of the blank is pre-cut at the cutting edges.
  • the drive wedge is then withdrawn, as a result of which the punches in the lower tool part are lowered.
  • the circumferential gap in the lower region of the blank increases significantly and the blank formed into the desired hollow profile is completely cut off at the cutting edges there.
  • the punches in the upper tool part remain in their previous position due to gravity, while the drive wedges move outwards. Due to the expanding hollow profile, the punches are pressed apart, after which the cutting edges are released.
  • the cutting contour is determined by the circumference of the profile through the course of the cutting edges. Since in the present case the die plates lie symmetrically on the circumference of the hydroforming component, this device is only suitable for hollow profiles with a rotationally symmetrical or rectangular cross section. The at the end of the hollow section the trimmed tongues can, however, be used as fastening flanges after a changeover process.
  • notching punches which can be moved in the radial direction to the hollow or shell profile, defined separating points are created between the lateral notching edges running in the longitudinal direction of the component, which are separated by a separating device separate from the punches, forming the extension section and a component to be produced exposed, cut component are separated.
  • a separating device separate from the punches, forming the extension section and a component to be produced exposed, cut component are separated.
  • the notching punches can themselves have cutting edges on their end face, with which they act on the hollow or shell profile and punch out a notching slug from the outside into the interior of the hollow or shell profile.
  • the notching dies for producing the notches recede relatively quickly in their implementation and thereby expose a cutting edge at the mouth opening of the implementation, which is formed on the engraving of the die of the IHU tool. This is driven by the internal high pressure, due to the resulting contact pressure of the hollow or shell profile on the engraving of the die at the location of the notch to be cut, a hole slug is cut out over the cutting edge of the engraving into the passage of the notching punch.
  • the jammed hole in the bushing can later be easily pushed out of the bushings after the hollow or shell profile has been removed from the tool, for example by advancing the release punch, whereby a catch device must be placed in the bushing area that prevents it from falling into the bushing Punched holes prevented in the empty engraving.
  • the device according to the invention further includes a cutting device, separate from the punches, for cutting the component along the end edge of the extension section to be produced, which is arranged within the IHU tool and extends in the circumferential direction of the Tool engraving directly connected to the notching punch.
  • the separating device which cuts the component along the cut is arranged outside the IHU tool.
  • the cutting device for this purpose can, for example, be designed in a simple manner as a knife-like cutting edge which pierces the material of the hollow or shell profile and thereby separates the hollow or shell profile except for a thin web.
  • the cutting device can be in the same be arranged in the axial position like the notching punches, since even when the hollow or shell profile is acted upon from the outside inwards by means of the notching punches, the cutting device in this case in no way gets into the notching area of the notching punches.
  • the device further includes a cutting device separate from the notching punches for cutting through the component along the end edge of the extension section to be produced except for a thin axial web adjacent to the notching edges, which cutting device within the IHU - Tool is arranged and adjoins the notching punch with a small distance in the circumferential direction of the tool engraving.
  • the separating device that separates the component at the location of the web is arranged outside the IHU tool. Due to the formation of a thin axial web, which results from the further developed method according to the invention according to claim 8, the separation process is facilitated by the separating device arranged outside the IHU tool due to the reduced material to be cut.
  • the cutting device now largely cuts through the hollow or shell profile, it would come into contact with the notching punches in the same direction in the same direction of action that the notching punches and the cutting device interfere with one another in an undesirable manner. Therefore, in the case of an axially identical arrangement of cutting device and notching punch, care must be taken that the traversing movement of the notching punch with respect to the cutting device runs in opposite directions.
  • the hollow or shell profile is preferably cut from the outside inwards by means of the cutting device, while the notches are cut in via the Bushings receding notch stamps on the cutting edge of the engraving are generated from the inside out.
  • the component trimmed in this way can still be removed in one piece from the hydroforming tool.
  • the cutting device consists of punches which have a knife-like end face, these, like the notching punches, can also be moved in separate passages and can be driven mechanically, pneumatically or hydraulically for this purpose.
  • the separating device for cutting through the component is arranged along the end edge of the extension section to be produced inside the hydroforming tool, wherein it directly adjoins the notching punch in the circumferential direction of the tool engraving, but outside the area of engagement thereof is axially offset.
  • the separating device can be formed by cutting punches. By means of these cutting punches, the component can easily be separated linearly along the abovementioned end edge during or after notching.
  • the separating device also consists of notching punches which simultaneously cut through the component and cause notches in the cut-off component, so that a notching pattern with respect to results in a middle cutting line in the form of alternating notches.
  • This has the very special advantage that the cut component itself can be used as a component to be installed and does not have to be disposed of as scrap.
  • the cut component also has extension sections that can be bent over and can serve as fastening flanges. This separation of the component to be cut from the hollow or shell profile does not necessarily have to take place at the end, but can also be carried out, for example, in the middle, it being possible in a very economical manner to produce identical parts with flanges from a single workpiece blank.
  • FIG. 2 shows the device according to the invention according to FIG. 1 in a cross-sectional illustration along the section line II -II from FIG. 1 during the notching process
  • FIG. 5 shows the hollow profile from FIG. 4 after the severing and exposure of the extension sections in a side plan view
  • Fig. 6 in a cross-sectional view the hollow profile of Figure 5 along a line VI-VI cut.
  • FIG. 1 shows a device 1 for producing a hollow or shell profile 2, which contains an internal high-pressure forming tool 3.
  • the hydroforming tool (IHU) 3 has an upper die 4 and a lower die 5, the engravings 6 of which delimit a molding space 7 into which the hollow profile 2 is inserted.
  • an axial ram 8 closes the respective mouth opening 9 of one end 10 of the hollow profile. fils 2.
  • the internal high pressure exerted in the hollow profile interior 11 of a pressure fluid introduced via the axial ram 8 at the end 10 forms a bottle neck.
  • bushings 13 are formed in the upper die 4 and the lower die 5, in which of the hollow profile 2 radially movable notching die 14 are arranged.
  • the notching punches 14 are arranged offset to one another in the circumferential direction.
  • a cutting device On the bottle neck 12 facing side 35 of the notching punch 14 there is a cutting device, which is also designed as a notching punch 15 and is guided radially to the hollow profile 2 in passages 16 of the hydroforming tool 3. While the notching punches 14, as can be seen in FIG.
  • the notching punches 15 of the cutting device are in the area of the longitudinal sides 18 of the hollow profile 2 in the IHU - Tool 3 arranged and can only act on this ( Figure 3).
  • the notching punches 15 are thus arranged offset to the notching punches 14 such that the notching punches 15 cover the arrangement gaps 19 between the notching punches 14 and the notching punches 14 the arrangement gaps 20 of the notching punches 15 almost completely.
  • the notching punches 15 are thus axially offset outside the engagement area of the notching punches 14. In the circumferential direction of the tool engraving 6, however, they adjoin one another almost directly, as said.
  • the notching punches 14 are jerkily withdrawn in their passages 13 in this exemplary embodiment.
  • the gravure Ren 6 of the upper die 4 and the lower die 5 formed cutting edge 21 released, along which the hollow profile 2, with the formation of notches 22 and an associated notch 23 is trimmed.
  • the notch 23 is placed on the end face 24 of the respective notching punch 14 and is pressed together with the latter into the bushing 13, driven by the still high internal pressure.
  • the notching punches 15 are moved towards the hollow profile 2 according to FIG. 3, punched out of this notching slug 25 and in the process are immersed together with them into the hollow profile interior 11.
  • the release punch 15 is withdrawn into its bushings 16 after the release.
  • the method of release notches 15 and 14 can be kinematically reversed to form the notches.
  • the pressure fluid is then expanded and led out of the hollow profile interior 11.
  • the hydroforming tool 3 is opened and the hollow profile 2, which has been circumferentially cut at an axial distance from its end 10, is removed therefrom.
  • the hollow profile 2 shown in FIG. 4 accordingly has notches 22 and notches 26 which are axially offset from one another and are each spaced apart from one another in the circumferential direction. Extension sections 27 and 28 remain between the notches 22 and between the notches 26, the extension sections 27 being connected to the extension sections 28 at the notch edges 29 by a thin, axial web 30.
  • the extension section 27 is thus almost completely cut through at its terminating edge 31 and the extension section 28 through the notches 22 at its terminating edge 32.
  • the hollow profile 2 is cut at the location of the webs 30 outside the hydroforming tool 3 by means of a separating device, not shown here, which leads to a component 33, as can be seen from FIG. 5 and FIG. 6 .
  • the extension sections 27, the end edges 31 of which are now completely exposed, are bent to a flange section of the hollow or shell profile by means of a bending device, which is also not shown here.
  • the webs 30 may already tear off when they are cut through due to their stretching with a very thin wall thickness, so that a separate separating device outside the internal high-pressure forming tool can be dispensed with.

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

Abstract

L'invention concerne un dispositif (1), et un procédé pour produire un profilé en coque et un profilé creux (2) comprenant un outil (3) de moulage par haute pression interne (IHU), présentant au moins une matrice (4, 5), dans laquelle un composant à transformer en profilé en coque et en profilé creux est placé, au moins une matrice supérieure (8) à calfeutrer et à établir sur la matrice (4, 5) dans le sens longitudinal axial du profilé (2) en coque ou de profilés creux. L'objectif de l'invention est de faciliter la production de composants IHU, rassemblés en une pièce par des brides d'assemblage. A cet effet, au moins deux matrices d'encoches(14), pouvant fonctionner radialement, sont intégrées dans l'outil IHU (3) de manière à former des entailles (22) dans le sens périphérique, et espacées les unes des autres, de sorte que le dispositif (1) contienne un dispositif de séparation séparé des matrices d'encoches (14) permettant de séparer le composant entre les bords des entailles (29), lors de la formation d'une partie allongée (27), et un dispositif de courbure permettant de courber la partie allongée (27) à l'extérieur de l'outil IHU (3) vers une bride du profilé creux et du profilé en coque (2).
PCT/EP2004/014267 2004-01-16 2004-12-15 Dispositif et procede pour produire un profile en coque et un profile creux au moyen de moulage par haute pression interne WO2005068102A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002553622A CA2553622A1 (fr) 2004-01-16 2004-12-15 Dispositif et procede pour produire un profile en coque et un profile creux au moyen de moulage par haute pression interne

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004002267.4 2004-01-16
DE200410002267 DE102004002267B3 (de) 2004-01-16 2004-01-16 Einrichtung und Verfahren zur Herstellung eines Hohl- oder Schalenprofils

Publications (1)

Publication Number Publication Date
WO2005068102A1 true WO2005068102A1 (fr) 2005-07-28

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PCT/EP2004/014267 WO2005068102A1 (fr) 2004-01-16 2004-12-15 Dispositif et procede pour produire un profile en coque et un profile creux au moyen de moulage par haute pression interne

Country Status (3)

Country Link
CA (1) CA2553622A1 (fr)
DE (1) DE102004002267B3 (fr)
WO (1) WO2005068102A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2467849A (en) * 2009-02-16 2010-08-18 Vari Form Inc Method of forming hollow body with flange
WO2021190967A1 (fr) * 2020-03-27 2021-09-30 Man Truck & Bus Se Structure de support pour véhicule automobile, en particulier pour porter des éléments de ressort et/ou d'amortissement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104001781B (zh) * 2014-04-22 2017-01-04 哈尔滨工业大学（威海） 一种高精度空心构件的成形装置及方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0849012A1 (fr) * 1996-11-20 1998-06-24 Daimler-Benz Aktiengesellschaft Procédé et dispositif pour produire des troux sur la périsphère des profilés creux
US5941112A (en) * 1998-11-23 1999-08-24 General Motors Corporation Method and apparatus for hydrotrimming and hydroshearing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0849012A1 (fr) * 1996-11-20 1998-06-24 Daimler-Benz Aktiengesellschaft Procédé et dispositif pour produire des troux sur la périsphère des profilés creux
US5941112A (en) * 1998-11-23 1999-08-24 General Motors Corporation Method and apparatus for hydrotrimming and hydroshearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2467849A (en) * 2009-02-16 2010-08-18 Vari Form Inc Method of forming hollow body with flange
GB2467849B (en) * 2009-02-16 2012-02-15 Vari Form Inc Method of forming hollow body with flange
US9302307B2 (en) 2009-02-16 2016-04-05 Vari-Form, Inc. Method of forming hollow body with flange
WO2021190967A1 (fr) * 2020-03-27 2021-09-30 Man Truck & Bus Se Structure de support pour véhicule automobile, en particulier pour porter des éléments de ressort et/ou d'amortissement

Also Published As

Publication number Publication date
CA2553622A1 (fr) 2005-07-28
DE102004002267B3 (de) 2004-10-14

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