EP3369493B1 - Procédé de fabrication d'un profilé par appointage et étirage - Google Patents

Procédé de fabrication d'un profilé par appointage et étirage Download PDF

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Publication number
EP3369493B1
EP3369493B1 EP18159795.6A EP18159795A EP3369493B1 EP 3369493 B1 EP3369493 B1 EP 3369493B1 EP 18159795 A EP18159795 A EP 18159795A EP 3369493 B1 EP3369493 B1 EP 3369493B1
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EP
European Patent Office
Prior art keywords
profile
starting
die
shaping
sharpened
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EP18159795.6A
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German (de)
English (en)
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EP3369493A1 (fr
EP3369493C0 (fr
Inventor
Hendrik Busch
Olaf Schwedler
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.)
Kme Mansfeld GmbH
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Kme Mansfeld GmbH
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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
    • B21C5/00—Pointing; Push-pointing
    • B21C5/003—Pointing; Push-pointing of hollow material, e.g. tube

Definitions

  • the invention relates to a method for producing a profile with a target dimension.
  • continuous casting which in particular involves drawing an extruded profile
  • the primary material for extrusion is made from continuous casting, in particular a metallic profile, for example made of copper, is pulled through a forming die, so that after pulling through the continuous profile essentially the shape of the forming die and thus the profile has a target dimension.
  • the WO 2007/122254 A1 apparently describes a method for sharpening an injection cannula by means of a device which has a tapered cavity into which one end of the tubular cannula is pushed, the opening of the cavity being vibrated at a frequency of over 10,000 Hz in the ultrasonic range in order to sharpen the cannula.
  • the object of the invention is to improve the state of the art.
  • the task is solved by a method for producing a profile with a target dimension according to claim 1.
  • the core of the invention is, in particular, that a profile is preformed in such a way that one end of the profile can be passed through a forming die and the profile can then be pulled through the forming die.
  • the preforming of one end of the profile takes place by means of a recursively modulated axial forming, which causes a cutting surface of the structures of the profile to be successively reduced in size - and thus "sharpened".
  • This recursive, modulated axial forming means that the delicate structures of a profile are not mechanically changed as much as if it were introduced directly into the forming die.
  • the invention makes it possible for the first time to "thread" filigree structures and to form a profile by pulling them through a forming die. This means that there is a completely new manufacturing process and the range of profile shapes can be significantly increased.
  • a “profile” is also called a construction profile or assembly profile.
  • Such profiles can, for example, have longitudinal grooves into which, for example, sliding blocks (also referred to as sliding blocks) can be pivoted.
  • the “target dimension” is in particular the dimension that the profile should have at the end of processing. Essentially, both the profile structure and the essential external dimensions are present. However, further treatment steps can be carried out, which essentially affect the strength and surface quality, but only have a very small effect on the dimensions of the profile cross section.
  • the target dimension is specified in particular by a “shaping die” through which, for example, a semi-finished copper product is “pulled”.
  • the forming die essentially realizes the cross-sectional area, which forms the shaped profile over a length by pulling.
  • the forming die is therefore essentially responsible for the cross-sectional shape of the profile.
  • “Pulling through” is a forming process and is generally part of tension-compression forming. This is very often used for wire pulling. For example, drawing is carried out using drum drawing machines, straight drawing benches or continuous drawing machines.
  • the "initial profile” is a profile that has slightly larger dimensions than the profile after it has been drawn through the forming die.
  • the end of the initial profile is pressed further and further into a mold by means of an axial back and forth movement, which successively imprints a profile on the end of the initial profile, which is tapered and can be carried out by the forming die essentially without contact or correspondingly with little contact.
  • fine or correspondingly filigree structures especially in the case of copper, are not bent, but are successively fed into the corresponding shape.
  • a molding force with which the profile end is pressed into the mold and/or the depth with which the profile end is inserted into the mold can be adjusted.
  • the recursive effect occurs several hundred times per second, with the optimal frequency being determined depending on the material, profile cross section, etc.
  • edges at the end of the starting profile are thinned out, thus reducing the cross-sectional area so that the end essentially forms a point. What is particularly important is that the edges are “sharpened” on both sides or accordingly all the way around so that threading into the forming die can be carried out in a reproducible manner.
  • the edges of one end of the initial profile can have a cone or wedge.
  • these edges can also be tapered in a stepped or curved manner.
  • a “pointed profile” which has a “point” at its “profile end”.
  • the pointed dimension is designed in particular in such a way that a partial insertion of the profile end of the starting profile can be introduced into the forming die without contact.
  • the sharpened end of the profile can also have constant dimensions over a longer section, whereby the profile end of the initial profile can be guided completely through the forming die, so that at the end of the forming die the drawing tool can grip the profile end and produce the profile by pulling the initial profile through the forming die.
  • Profiles with complex geometries can therefore be realized for the first time, particularly for copper.
  • Complex geometries are in particular geometries in which a force vector orthogonal to a mirror axis or in the direction of a mirror point creates a contour at the profile end of the starting profile, which lies outside the contour of the forming die and thus forms contact with the forming die during threading and becomes one Bending the profile end of the starting profile would cause.
  • complex structures can be webs in a hollow profile and the like.
  • the “contour” is formed in particular by the material surface of the profile, which is formed at the end of the profile when a cut is made.
  • the complex geometry is a thin-walled structure or structures, or it is a free element or there are several free elements, or it has a cavity or several cavities.
  • Thin-walled structures are in particular webs that cannot be produced using manufacturing processes according to the state of the art. These can range from a few tenths of a millimeter to 3 millimeters.
  • Free elements are, for example, grooves or corresponding tongues and the like in a hollow profile.
  • Tron cavities are formed, for example, by one cavity being delimited by a web.
  • the recursively modulated axial shaping is carried out using a pointed die, which in particular has an axially conical shape cross section.
  • the “point size die” is the component that imprints the shape for “threading through” on the end of the starting profile. The pointed die therefore thins out the edges of the profile end.
  • an initial profile it can be produced by continuous casting.
  • copper or copper alloys in particular are used in continuous casting.
  • the initial profile is pressed or rolled, so that a pressed and/or rolled initial profile, in particular a pressed and/or rolled continuously cast initial profile, is present. This can influence the strength of the profile.
  • a pointed die for recursively modulated axial forming has an axially conical cross section, so that a sharpened profile is achieved by means of recursively modulated axial forming Has a pointed dimension that is true to shape and in which only the wall thickness of the profile is reduced. This allows a profile to be produced that ensures the desired shape and dimensional stability.
  • a device for recursively modulated axial forming has a pointed die as described above.
  • An initial profile 103 made of a copper alloy has the contour of a double-T beam. This initial profile 103 was obtained by casting and subsequent rolling. In an alternative, the initial profile was obtained by extrusion. As soon as the initial profile 103 has been processed by means of recursively modulated axial shaping in a pointed die 223, a profile 105 with a pointed dimension is given at one profile end 211.
  • the profile with pointed dimension 105 is dimensioned smaller than the profile with target dimension 101, this profile 101 corresponding to the desired product shape.
  • the initial profile 103 is introduced into a pointed die 223 step by step in the recursive axial shaping direction 241.
  • the force and the depth with which the starting profile 103 is inserted into the pointed die is set based on the copper alloy, so that each time the starting profile is inserted, the end of the profile is only shaped but not bent.
  • the starting profile 103 is inserted a little further into the pointed die 223 and then pulled out a short distance again. After 400 steps, the starting profile 103 then has the profile with a point 105 at one profile end 211.
  • the starting profile 103 with the profile with a pointed dimension 105 located at the profile end 211 is then pulled out of the pointed dimension die 223 and threaded through the forming die 221 so that a profile end 211 protrudes from the forming die 221.
  • This profile end 211 is gripped by a gripper (not shown) and pulled through the forming die 221 by a pulling device (not shown).
  • a profile with target dimension 101 is thus impressed on the starting profile 103. Only the profile end 211 has different dimensions than the desired profile with target dimension 101. The unwanted part is separated and the end product is available.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Claims (6)

  1. Procédé de fabrication d'un profilé (101) d'une dimension cible, comprenant les étapes consistant à
    - appointer une extrémité d'un profilé de départ (103), de sorte que le profilé présente une dimension pointue à une extrémité de profilé (211) et qu'un profilé appointé (207) avec une extrémité pointue soit présent,
    - passer le profilé appointé à travers une matrice de formage (221) et ensuite
    - tirer le profilé appointé à travers la matrice de formage, de sorte qu'après le tirage, le profilé présente sensiblement la dimension cible,
    caractérisé en ce que
    - l'appointage est réalisé par formage axial modulé récursif, dans lequel, par un mouvement de va-et-vient axial, l'extrémité du profilé de départ est enfoncée de plus en plus dans la matrice de formage qui imprime de manière successive un profilé à l'extrémité du profilé de départ, dans lequel le formage axial récursif est réalisé quelques centaines de fois par seconde.
  2. Procédé selon la revendication 1, caractérisé en ce que le profilé présente une géométrie complexe.
  3. Procédé selon la revendication 2, caractérisé en ce que la géométrie complexe présente une structure à paroi mince (351), des structures à paroi mince, un élément libre (355), plusieurs éléments libres, une cavité (353) et/ou plusieurs cavités.
  4. Procédé selon l'un quelconque des procédés précédents, caractérisé en ce que le formage axial modulé récursif est réalisé au moyen d'une matrice d'appointage (223), qui présente en particulier une section transversale de formage axialement conique.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le profilé de départ est fabriqué par coulée continue, de sorte qu'un profilé de départ coulé en continu soit présent.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le profilé de départ est pressé et/ou laminé, de sorte qu'un profilé de départ pressé et/ou laminé, en particulier un profilé de départ coulé en continu pressé et/ou laminé, soit présent.
EP18159795.6A 2017-03-03 2018-03-02 Procédé de fabrication d'un profilé par appointage et étirage Active EP3369493B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017104496.5A DE102017104496A1 (de) 2017-03-03 2017-03-03 Verfahren zum Herstellen eines Profils und Spitzmaßmatrize sowie Vorrichtung

Publications (3)

Publication Number Publication Date
EP3369493A1 EP3369493A1 (fr) 2018-09-05
EP3369493C0 EP3369493C0 (fr) 2023-11-08
EP3369493B1 true EP3369493B1 (fr) 2023-11-08

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ID=61563208

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Application Number Title Priority Date Filing Date
EP18159795.6A Active EP3369493B1 (fr) 2017-03-03 2018-03-02 Procédé de fabrication d'un profilé par appointage et étirage

Country Status (2)

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EP (1) EP3369493B1 (fr)
DE (1) DE102017104496A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1602369U (de) 1948-10-29 1950-03-02 Reutlinger Strickmaschinenfabr Verbindungsbuegel fuer musterkettenglieder (z. b. pappkarten) von mustervorrichtungen, insbesondere fuer strickmaschinen.
US3256731A (en) * 1965-08-30 1966-06-21 Du Pont Metal drawing procedure
DE2653784A1 (de) 1976-11-26 1978-06-01 Kabel Metallwerke Ghh Verfahren und vorrichtung zum ziehen von rohren
DE3600700A1 (de) 1986-01-13 1987-07-23 Rudolf Bueltmann Maschine zum stossen von rohrziehangeln (pushpointer)
EP2012854A1 (fr) * 2006-04-26 2009-01-14 Novo Nordisk A/S Canule a extremite effilee pour un dispositif d'injection et procede de fabrication

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Publication number Publication date
EP3369493A1 (fr) 2018-09-05
EP3369493C0 (fr) 2023-11-08
DE102017104496A1 (de) 2018-09-06

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