EP1481744B1 - Procédé et dispositif pour fabriquer une pièce profilée - Google Patents

Procédé et dispositif pour fabriquer une pièce profilée Download PDF

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Publication number
EP1481744B1
EP1481744B1 EP04003037A EP04003037A EP1481744B1 EP 1481744 B1 EP1481744 B1 EP 1481744B1 EP 04003037 A EP04003037 A EP 04003037A EP 04003037 A EP04003037 A EP 04003037A EP 1481744 B1 EP1481744 B1 EP 1481744B1
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EP
European Patent Office
Prior art keywords
calotte
heat supply
transfer area
prespecifiable
rim
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.)
Expired - Lifetime
Application number
EP04003037A
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German (de)
English (en)
Other versions
EP1481744A1 (fr
Inventor
Jan-Dirk Beckmann
Otto Feldbinder
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.)
Feldbinder and Beckmann Fahrzeugbau GmbH and Co KG
Original Assignee
Feldbinder and Beckmann Fahrzeugbau GmbH and Co KG
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.)
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Publication date
Application filed by Feldbinder and Beckmann Fahrzeugbau GmbH and Co KG filed Critical Feldbinder and Beckmann Fahrzeugbau GmbH and Co KG
Publication of EP1481744A1 publication Critical patent/EP1481744A1/fr
Application granted granted Critical
Publication of EP1481744B1 publication Critical patent/EP1481744B1/fr
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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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/18—Spinning using tools guided to produce the required profile
    • B21D22/185—Spinning using tools guided to produce the required profile making domed objects

Definitions

  • the invention relates to a method and a device for metal pressing a blank, made of aluminum, to a curved molding.
  • a blank present as a sheet metal blank or preform is set in rotation and brought into the desired, rotationally symmetrical molded part by an introduced and advanced pressing tool.
  • An overview of known pressing method is in "sheet-tube profiles" 28 (1981) 11, pages 514-517 can be removed.
  • the blank is clamped centrally in a pressure chuck whose outer contour corresponds to the inner contour of the desired molded part.
  • the spinning tool in the form of a spinning roller follows the outer contour of the desired molded part, so that the blank between the spinning roller and the spinning chuck can be formed.
  • the spinning roller is motion-controlled either via copy templates or via an NC control.
  • DE 100 47 491 A1 discloses a method for forming structures of aluminum alloys, which is a reshaped component by elastic molding in a predetermined contour under external force and heating the elastically-shaped component to a temperature greater than that for creep and stress relaxation of the alloy brings necessary temperature, so that the component while maintaining the Contour is reshaped.
  • This method is exemplary for methods in which initially act in a first shaping step forces to achieve a predetermined contour of a component and in a second step, a heat treatment takes place, are then eliminated by the resulting stresses.
  • This two-stage implementation of the shaping process is very complicated and requires the heating of the entire component to eliminate the existing stresses.
  • a further method is shown in which according to the document DE 40 16 097 A1 a blank is formed by metal pressing to a curved molding by the blank is clamped circumferentially and bulged into a space.
  • an increased working temperature during metal pressing is already used in the first forming step by a two-stage heating of the blank, wherein substantially the entire blank is brought to and maintained at a first temperature below working temperature and only partial areas of the blank are brought to operating temperature before being pressed become.
  • the disadvantage here is that the method also necessarily has the complete blank initially to a working temperature below the later required during metal pressing in partial areas of the blank working temperature must be brought.
  • the method requires a device in which a two-stage heating device is provided for metal pressing depending on the desired temperatures in order to carry out the two-stage shaping with different operating temperatures can.
  • US-A-2 300 527 discloses an apparatus according to the preamble of claim 7 which is suitable for producing a container bottom made of aluminum, and a method for metal-pressing a blank into a curved molding.
  • the blank is clamped circumferentially and in a space a dome is arched to a predeterminable radius of curvature, the dome then held down rotating is, with the simultaneous application of heat in a, determined by a predetermined diameter of the dome transition region, a brim with a predetermined radius is formed.
  • the invention is therefore based on the object to provide a method and an apparatus which cost dimensionally accurate forming of moldings, in particular container bottoms allowed, in particular in the areas where high stresses occur by the forming process, stresses already during the forming process be avoided or occur only to a very limited extent.
  • a dome with a predetermined radius of curvature is held down in rotation and formed with simultaneous heat input in a predetermined by a predetermined diameter of the dome transition area a brim with a predetermined radius, the formation of stresses in the transition region between the dome and brim is avoided from the outset , so that can be dispensed with a subsequent annealing in general.
  • the calotte is thereby only to be heated in the transition region for reducing the stresses, so that heating of the entire component can be dispensed with.
  • a device is formed which advantageously permits to form the calotte exactly in the predetermined transitional area by means of the heat supply device and by an arranged stationary forming tool to form the brim stress-free to a predeterminable radius.
  • Moldings in particular container bottoms, such as dished ends, baskets or hemispherical bottoms, which are characterized in that they comprise a dome and a brim, the dome has a radius of curvature and the brim a radius reduced relative to the dome radius and have a transition region between the calotte and the brim formed on a predeterminable diameter, as well as being stress-relieved or ideally tension-free by a heat treatment carried out during the production of the brim in the transition region.
  • the transition region between the predeterminable curvature radius of the calotte and the region of the radius of the rim to be formed is formed and heated.
  • the at least one heat supply device is positioned in the direction of rotation in front of the forming tool for this purpose.
  • a plurality of heat supply devices are arranged at the transition region between the dome and the brim, which are arranged symmetrically on the dome in a first embodiment variant or in a second embodiment variant symmetrically.
  • An arrangement of the heat supply device from an outer side of the calotte is preferred, wherein an arrangement of the inner side or of the outer and inner side and thus a one-sided or two-sided effect on the transition region can be achieved.
  • the transition region is uniformly heated by the arranged heat supply means, wherein a desired forming temperature for the molding is selectable.
  • the heating of the molding at the predetermined temperature leads under stress relaxation to a plastic deformation of the dome in the transition region under formation of the brim.
  • the predeterminable temperature in the transitional area between the dome and the brim be adjusted by controlling the heat supply device and / or spacing the heat supply device to the surface of the dome or the brim.
  • an active surface of the heat supply device is set as a function of the desired area of the transition region to be heated.
  • the device according to the invention for carrying out the method comprises a pressing tool for metal pressing a blank, a clamping means for clamping the blank and a rotation device on which the rotating Cap is formed by at least one stationary heat supply device and a stationary forming tool.
  • the rotation device on a rotary table with a support element and a hold-down.
  • the hold-down device preferably engages in the center on an inner side of the molded part, in particular of the calotte.
  • the spinning tool and the stationary forming tool are executable in a common device or in separate devices.
  • the pressing tool engages on the inside of the dome, wherein the stationary forming tool in a preferred embodiment of the invention is a flaring pear, which also has on the inside of the dome and a crimping roller which acts on an outer side of the dome.
  • the stationary forming tool in a preferred embodiment of the invention is a flaring pear, which also has on the inside of the dome and a crimping roller which acts on an outer side of the dome.
  • the calotte can be heated on the predeterminable diameter and the formed transition region by the heat supply device such that the brim can be formed on a predeterminable radius by plastic material deformation.
  • the heat supply device has a stator element, a base element, a first and a second fastening element and a media connection and a burner.
  • the first and second fastener serve to adjust an angle and a distance of the burner relative to the dome or for adjusting a height of the burner relative to the dome.
  • the burner can be arranged by the first and / or second device such that the burner flame strikes the transition region at right angles, wherein the burner can be readjusted at any time before and during the process, ie also at other angles to the surface to be deformed in the transition region
  • the method in which the forming of the molding in the transition region and its heating are carried out simultaneously is advantageously at the suitable temperature for the material to be formed, which is only about 120 ° C and in any case below an annealing temperature, the Forming of stresses in the strongly transforming transition region between dome and brim from the outset avoided.
  • the heat at this relatively low level for example, with two opposing heat sources or with a plurality of symmetrically arranged heat sources, during rotation of the container bottom of the crimping, ie the area between the dome and brim, heated very evenly, so that optimum material properties for forming and after the forming process voltage freedom can be achieved.
  • Figure 6 shows schematically a container bottom 30, in particular a basket bottom.
  • the container bottom 30 has a cap 22 and a brim 20.
  • the calotte 22 has a radius of curvature r wi and the brim 20 has a radius r ki .
  • the dome 22 itself is determined by the diameter d k and the rim 20 and the cap 22 by a nominal diameter d a .
  • FIG. 6 shows a transition region 32 between the rim 20 and the calotte 22.
  • FIG. 1 shows a device 10 according to the invention, which holds the container bottom 30, in particular the cap 22, in a clamping means 12, so that a pressing tool 14 is used to deform the blank to the cap 22.
  • the clamping means 12 can be designed in various ways, it is essential that the clamping means 12, the dome 22 rotatably holds in a clamped position.
  • the pressing tool 14 allows, as Figure 1 shows, in addition to the determination of the dome 22, a rotation within the tools of Einspannstoffs 12. By forming by means of pressing tool 14 receives the blank, in particular the cap 22, the curvature radius r wi .
  • FIG. 2 essentially shows a heat supply device 18 for forming the brim 20 on the shaped dome 22, as described in FIG. 1.
  • the heat supply device 18 has a stator element 18A, a base element 18B, a media connection 18E and a burner 18F, which can pass through first fastening element 18C adjustable in its length and is arranged adjustable by a second fastening element 18D in its height and its angle.
  • the heat supply device 18, in particular the burner 18F acts on the transition region 32 between the rim 20 and the cap 22, in the embodiment of an outer side 38 of the container bottom 30th
  • FIG. 3 shows the device 10, in particular a forming tool 16, which is designed in the form of a flaring bulb 42 and acts on the container bottom 30 from an inner side 36.
  • the forming tool 16 forms at least one crimping roller 24 opposite the crimping bulb 42, which guides and holds the container base 30 in the region of the brim to be formed.
  • FIG. 3 shows, in addition to the crimping roller 24, two pressure rollers 24a which stabilize the workpiece.
  • the container bottom 30 rotates in the direction of rotation 46.
  • the device 10 has a rotation table 40.
  • the rotary table 40 is shown in FIG. 4 and essentially has a support element 28 and a hold-down 26.
  • the container bottom 30 is in the forming tool 16 is rotationally moved on the rotary table 40 and in the area of the flaring bulb 42 and the rollers 24 (not visible in Figure 4).
  • the brim 20 is formed with simultaneous heat supply in the transition region 32, starting from the predetermined diameter d k of the calotte 22 with a predetermined radius r ki .
  • FIG. 4 shows this process of forming the brim 20, wherein the heat supply devices 18 are arranged symmetrically with respect to the crimping bulb 42 and the dowel rolls 24.
  • the heat supply devices 18 are arranged so that a heat supply via the burner 18 F is achieved exactly in the transition region 32 between the rim 20 and dome 22.
  • the heat supply device 18 acts from the outside 38 on the cap 22 and the brim 20 in the transition region 32, wherein also a supply of heat from the inside 36 and on both sides inside 36 and outside 38 is feasible.
  • a stress relaxation is achieved during the formation of the rim 20 in the transition region 32 at the same time.
  • a control unit 48 with a control system for controlling the entire device 10, consisting from the spinning tool 14 and the forming tool 16, available.
  • the control unit and the control system 48 can also be used to control the heat supply device 18 (not shown). Another possibility is to set the temperature only over time.
  • FIG. 5 shows the container bottom 30 produced, in particular a basket bottom, after the return of the hold-down 26 of the forming tool 16.
  • the support element 28 is designed to be height adjustable.
  • the forming tools 18 are also for removing the container bottom 30 easily over rollers 44 movable, as Figure 5 shows.
  • the method and the device are particularly suitable for the production of dished bottoms and basket sheet aluminum.
  • the production of larger container bottoms usually results in decreasing radii r ki of the rim 20 to make the cap 22 and brim 20 separately and later - especially by welded joints - are reassembled. This procedure is particularly because stresses in a one-piece production can usually be avoided insufficient.
  • the new method and the new associated device now make it possible to produce container bottoms 30 in one piece with heat supply in the transition region 32 and to achieve stress relaxation, in particular even if a decreasing radius r ki is to be formed into a particularly pronounced brim 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)

Claims (13)

  1. Procédé d'emboutissage d'un flan en aluminium en un préformé cintré, notamment en un fond de réservoir, dans lequel le flan est serré sur sa circonférence et une calotte (22) est cintrée vers l'intérieur d'un espace libre jusqu'à un rayon de cintrage (rwi) paramétrable, la calotte (22) étant ensuite maintenue en rotation, et un rebord (20) ayant un rayon (rki) paramétrable étant formé, en présence d'un apport de chaleur simultané, dans une zone de transition (32) définie par un diamètre (dk) paramétrable de la calotte (22),
    a) la zone de transition (32) étant constituée et chauffée entre le rayon de cintrage (rwi) paramétrable de la calotte (22) et la zone du rayon (rki) à former du rebord (22),
    b) au moins un équipement d'apport de chaleur (18) étant positionné dans la zone de transition (32) dans la direction de rotation (46) avant un outil de formage (16),
    c) l'équipement d'apport de chaleur (18), au moins au nombre de un, agissant sur la zone de transition (32) à partir d'un côté extérieur (38) et/ou d'un côté intérieur (36) de la calotte (22),
    d) l'équipement d'apport de chaleur (18), au moins au nombre de un, chauffant uniformément la zone de transition (32),
    e) en présence d'une température paramétrable et d'une relaxation de tension, un formage plastique de la calotte (22) étant entrepris dans la zone de transition (32) en présence d'une formation du rebord (22), et
    f) la température paramétrable étant égale à environ 120 °C.
  2. Procédé selon la revendication 1, caractérisé en ce que plusieurs équipements d'apport de chaleur (18) sont positionnés sur la zone de transition (32) entre la calotte (22) et le rebord (22).
  3. Procédé selon la revendication 2, caractérisé en ce que les équipements d'apport de chaleur (18) sont positionnés de façon opposée sur la calotte (22) en rotation.
  4. Procédé selon la revendication 2 ou 3, caractérisé en ce que les équipements d'apport de chaleur (18) sont positionnés de façon symétrique sur la calotte (22) en rotation.
  5. Procédé selon la revendication 1 à 4, caractérisé en ce que la température paramétrable dans la zone de transition (32) entre la calotte (22) et le rebord (22) est réglée par la commande de l'équipement d'apport de chaleur (18), au moins au nombre de un, et/ou par l'éloignement de l'équipement d'apport de chaleur (18) à la surface de la calotte (22) ou du rebord (20).
  6. Procédé selon la revendication 5, caractérisé en ce qu'une surface active de l'équipement d'apport de chaleur (18) est réglée en fonction de la surface à chauffer de la zone de transition (32).
  7. Dispositif d'emboutissage d'un flan en aluminium en un préformé cintré, notamment en un fond de réservoir, qui présente au moins un moyen de serrage (12) pour le serrage, côté circonférence, du flan, et un outil d'emboutissage (14) commandé en mouvement, avec un rayon de cintrage (rwi), pour la fabrication d'une calotte par cintrage dans un espace libre, avec un équipement de rotation (40), sur lequel la calotte (22) en rotation peut être chauffée par au moins un équipement d'apport de chaleur (18) stationnaire et un outil de formage (16) stationnaire au moins dans la zone de transition (32) d'un diamètre (dk) paramétrable et un rebord (20) peut être formé jusqu'à un rayon (rki) paramétrable, caractérisé en ce que l'équipement d'apport de chaleur (18) présente un élément de support (18A), un élément de base (18B), un premier et un deuxième élément de fixation (18C, 18D) et un raccordement de fluides (18E) ainsi qu'un brûleur (18F).
  8. Dispositif selon la revendication 7, caractérisé en ce que l'équipement de rotation (46) présente une table de rotation (40) avec un élément d'appui (28) et un serre-flan (26), l'élément d'appui (28) et le serre-flan (26) s'appliquant de préférence dans le point central (34) de la calotte (22).
  9. Dispositif selon la revendication 8, caractérisé en ce que l'outil de formage (16) stationnaire présente une poire de bordage (42) qui s'applique sur un côté intérieur (36) de la calotte (22), et un rouleau de bordage (44) qui s'applique sur un côté extérieur de la calotte (22).
  10. Dispositif selon la revendication 7, caractérisé en ce que le premier élément de fixation (18C) présente un premier équipement de réglage d'un angle et d'un intervalle du brûleur (18F) par rapport à la calotte (22).
  11. Dispositif selon la revendication 7, caractérisé en ce que le deuxième élément de fixation (18D) présente un deuxième équipement de déplacement d'une hauteur du brûleur (18F).
  12. Dispositif selon une des revendications 7 à 11, caractérisé en ce que, à l'aide du premier et/ou du deuxième équipement, tout agencement, de préférence un agencement à angle droit, du brûleur (18F) par rapport à la zone de transition (32) est réglable de façon réajustable.
  13. Dispositif selon une des revendications 7 à 12, caractérisé en ce que l'équipement d'apport de chaleur (18), en particulier le brûleur (18F), peut être exploité avec un fluide combustible, comme du gaz ou de l'huile.
EP04003037A 2003-05-27 2004-02-11 Procédé et dispositif pour fabriquer une pièce profilée Expired - Lifetime EP1481744B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10324366A DE10324366A1 (de) 2003-05-27 2003-05-27 Verfahren und Vorrichtung zur Herstellung eines Formteiles, sowie Formteil, insbesondere ein Behälterboden
DE10324366 2003-05-27

Publications (2)

Publication Number Publication Date
EP1481744A1 EP1481744A1 (fr) 2004-12-01
EP1481744B1 true EP1481744B1 (fr) 2006-10-18

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EP (1) EP1481744B1 (fr)
AT (1) ATE342780T1 (fr)
DE (3) DE10324366A1 (fr)
ES (1) ES2274332T3 (fr)

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CN102172701A (zh) * 2011-01-27 2011-09-07 温岭市旭日滚塑科技有限公司 一种滚塑模具的旋压快速成型工艺

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JP4144637B2 (ja) 2005-12-26 2008-09-03 セイコーエプソン株式会社 印刷材収容体、基板、印刷装置および印刷材収容体を準備する方法
CN101391372B (zh) * 2008-10-22 2010-06-02 中材科技（苏州）有限公司 气瓶碟形封头成型工艺
US10092941B2 (en) 2012-08-10 2018-10-09 Kawasaki Jukogyo Kabushiki Kaisha Spinning forming apparatus and forming method
WO2014034140A1 (fr) * 2012-09-03 2014-03-06 川崎重工業株式会社 Procédé de repoussage et dispositif de repoussage
JP6077852B2 (ja) * 2012-12-18 2017-02-08 川崎重工業株式会社 スピニング成形装置
JP6291230B2 (ja) * 2013-11-29 2018-03-14 川崎重工業株式会社 スピニング成形装置およびスピニング成形方法
CN105583321A (zh) * 2015-12-23 2016-05-18 常州旷达威德机械有限公司 一种封头的收口装置及收口方法
CN105537356A (zh) * 2015-12-25 2016-05-04 中国航空工业集团公司北京航空制造工程研究所 感应加热旋压成形系统及方法
CN108161230B (zh) * 2018-01-30 2023-07-21 苏州德龙激光股份有限公司 一种准3d加工球冠栅网的装置及其方法
DE102018220265A1 (de) * 2018-11-26 2020-05-28 Thyssenkrupp Ag Endboden
CN109622714A (zh) * 2019-01-23 2019-04-16 西安深瞳智控技术有限公司 一种导引头的头罩旋压成形装置及其成形方法
CN112872140B (zh) * 2020-12-22 2022-11-29 池州赛唯特电子科技有限公司 一种蜂鸣器塑壳自动折边装置
CN113732150B (zh) * 2021-10-13 2024-03-15 广东科欣电气有限公司 一种旋压机用夹紧机构
CN116786672B (zh) * 2023-08-24 2023-10-31 河南神州精工制造股份有限公司 一种大直径瓜瓣封头旋压成型设备

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Publication number Priority date Publication date Assignee Title
CN102172701A (zh) * 2011-01-27 2011-09-07 温岭市旭日滚塑科技有限公司 一种滚塑模具的旋压快速成型工艺

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Publication number Publication date
EP1481744A1 (fr) 2004-12-01
DE10324366A1 (de) 2004-12-16
ATE342780T1 (de) 2006-11-15
ES2274332T3 (es) 2007-05-16
DE502004001766D1 (de) 2006-11-30
DE202004002115U1 (de) 2004-05-06

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