EP4252931A2 - Formage u-o d'un composant courbé selon trois axes spatiaux - Google Patents

Formage u-o d'un composant courbé selon trois axes spatiaux Download PDF

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Publication number
EP4252931A2
EP4252931A2 EP23193022.3A EP23193022A EP4252931A2 EP 4252931 A2 EP4252931 A2 EP 4252931A2 EP 23193022 A EP23193022 A EP 23193022A EP 4252931 A2 EP4252931 A2 EP 4252931A2
Authority
EP
European Patent Office
Prior art keywords
forming
preform
shape
spatial axis
produced
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.)
Pending
Application number
EP23193022.3A
Other languages
German (de)
English (en)
Other versions
EP4252931A3 (fr
Inventor
Thomas Henksmeier
Günter Fortmeier
Aloys Schröder
Matthias Körner
Eugen Seibel
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.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik GmbH
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 Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Publication of EP4252931A2 publication Critical patent/EP4252931A2/fr
Publication of EP4252931A3 publication Critical patent/EP4252931A3/fr
Pending 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • B21D5/015—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments for making 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
    • 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
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
    • 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
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/025—Stamping using rigid devices or tools for tubular articles
    • 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
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/06—Stamping using rigid devices or tools having relatively-movable die parts
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards

Definitions

  • the present invention relates to a method for producing a sheet metal forming component from a circuit board using U-O molds, according to the features of claims 1 and 2.
  • a metallic circuit board is provided, which is formed into a sheet metal forming component in a forming tool.
  • the sheet metal forming component has a three-dimensional contour. This forming usually takes place using a press forming tool between an upper tool and a lower tool.
  • UO forming is known from the prior art.
  • a flat board is first provided, this flat board is pre-formed into a U-shape and in Connection to it, formed in an O-shape to have a closed cross-section.
  • the object of the present invention is, based on the prior art, to improve the shaping options for a component produced in a U-O shape that is curved about at least two spatial axes.
  • the freedom of shaping can be significantly increased due to the intermediate shaping step with the packing.
  • the freedom of shaping can also be increased by producing a U-shape or U-preform with at least three curvatures, each curved about a spatial axis, with all three spatial axes being essentially perpendicular to one another.
  • An advantageous development according to the invention provides that when O-forming the U-shape produced in this way, the U-shape is placed on a component holder and mandrels are retracted at least on one side, preferably on both sides. The mandrels hold or fix the U-shape on the component holder. Mold jaws are then moved to the side of the U-shape. A die is lowered in the vertical direction in an overlapping and/or offset manner. Through the side molding jaws and the top-side die, an O-shaping is then carried out at least in sections, in particular completely over the length in the cross section, in such a way that a closed hollow profile is produced in the cross section. This allows two work stages to be combined into one work stage or in one tool.
  • the flat board can have a homogeneous wall thickness, but also different wall thicknesses, for example as a tailored blank.
  • a first curvature is created in the cross section by forming the U-shape.
  • the component is preferably also curved about a second spatial axis, which lies essentially transversely to the spatial axis of the U-shape.
  • the packing is thus pulled out of the preform again on the intermediate molding tool.
  • This deformation can also be partly plastic.
  • the filler ensures that no inward curvature is created in the intermediate shape.
  • O-shaping is then carried out, in particular the front sides of the ends are placed against one another. These can, for example, also be welded along the longitudinal seam. O-forming can be followed by an internal high-pressure forming process.
  • the O-shaping is preferably carried out in two steps, whereby first the bent ends are freely bent further inwards and then the end faces of the ends come together in a further process step.
  • a press forming tool which has a closed mold cavity in cross section when closed.
  • the intermediate mold when inserted into the O-shaped mold, the intermediate mold preferably has a maximum width that is smaller than the width of the mold cavity itself.
  • the height of the intermediate mold is flattened and the width is thereby increased, so that when the mold cavity is closed, the sheet metal forming component produced by O-forming rests on all sides against the mold cavity of the O-forming tool.
  • the preform or the intermediate form can be produced with a cross section that varies in the longitudinal direction and/or a varying wall thickness. Precisely because the degrees of freedom of shaping are increased through intermediate molding, varying cross-sections can also be produced over the length of the component.
  • Circuit boards with different wall thicknesses can also be processed, so-called tailored blanks.
  • the O-forming is carried out as hot forming, in particular with subsequent press hardening, so that a high tensile strength of more than 1000 MPa can be achieved in a hardenable steel alloy.
  • Figure 1a , 1b , 1c and 1d show a deep-drawing tool 2 in order to form an initially provided flat metallic circuit board 1 on a deep-drawing tool 2 for U-shaping and thus into a preform.
  • the circuit board 1 is inserted into the deep-drawing tool 2 and a hold-down device 4 is lowered onto a die 3, shown in Figure 1b .
  • a first curvature 5 is created around a spatial axis X, so that the board 1 is preformed with an arch or a wave.
  • Two or three curvatures could also be created, each offset in parallel around the first spatial axis X, for example according to the principle of a wave profile.
  • a forming die 6 then moves into the deep-drawing tool 2 and creates a second curvature 7, shown in Figure 2 about a second spatial axis Y.
  • the stamp 6 is also curved in its longitudinal direction about a third spatial axis Z. This is particularly evident in the top view according to Figure 1c .
  • the second curvature 7 is generated about the second spatial axis Y, but also the first curvature 5 about the first spatial axis X is generated on the U-preform 11, and also a third curvature 29 ⁇ m a third spatial axis Z.
  • the second spatial axis Y and the first spatial axis X and the third spatial axis Z preferably run transversely to one another, but they do not have to intersect.
  • spatial axes X, Y and Z can also be arranged in an angular range of 60 to 110 degrees, in particular 70 to 100 degrees, to one another.
  • the spatial axes do not have to intersect; they can be offset from one another. If both were projected into one plane, they would run in the above-mentioned angular range or across each other.
  • a U-shaped preform 11 is thus created according to Figure 3a , b and c a first curvature 5 about a first spatial axis X and a second curvature 7 about a second spatial axis Y and a third curvature 29 about a third spatial axis Z.
  • the second spatial axis Y is shown here following the curvature 5 around the first spatial axis X.
  • the U-preform 11 has a U-shape, the legs 8 of which are trimmed at each end 9. In particular, this trimming is carried out close to the final contour. This results in end faces 10 at the ends 9. The end faces 10 extend over the length L of the U-preform 11.
  • the intermediate forming according to the invention now takes place, shown in Figures 4 , 5a and 5b .
  • the U-shaped preform 11 is placed on an anvil 12 and a packing 13 is inserted into the preform 11.
  • the legs 8 and in particular in their end region 9 are then bent by further tool parts 14 of an intermediate molding tool 15. This is done in such a way that the ends 9 of the legs 8 are bent towards each other. They therefore overlap, at least in sections, the filler 13, shown in Figure 5a .
  • the tool parts 14 are then opened, indicated by the dashed arrows. So that the filler 13 can now be pulled out of the intermediate mold 16 produced with it, at least one pin 17 is provided, which passes through the filler 13 and presses onto the bottom 18 of the intermediate mold 16, so that when the filler is pulled out, the legs 8 are elastically deformed outwards become what in Figure 5b is shown. A slight plastic deformation of the legs 8 can also take place.
  • This intermediate shaping step is then followed by O-shaping, particularly preferably in two further process steps.
  • the intermediate mold 16 produced in this way is placed on another anvil 19 and with it Tool parts 20 of an O-shaped tool, the legs 8 and in particular the ends 9 of the legs 8 are bent further inwards, shown in Figure 7 .
  • a retaining pin 21 is provided, which presses the bottom 18 of the intermediate mold onto the anvil 19, so that the legs 8 are bent further towards each other, shown in the Figures 6 and 7 .
  • a press forming tool 24 is then used, which has an upper tool 22 and a lower tool 23.
  • a mold cavity 25 is according to Figure 10 with a width B25 wider than a width B16 of the intermediate mold 16 after the first process step of O-forming (cf. Figure 10 ).
  • the press forming tool 24 is consequently closed, shown in Figure 9 .
  • the result is a closed mold cavity.
  • the end faces of the ends are placed against one another and a sheet metal forming part 26 with a closed cross section, also called a molded component, is produced. This lies in particular with its outer surface 27 on all sides against the inner surface 28 of the mold cavity 25.
  • Figures 11, 12 , 13 and 14 show an alternative embodiment variant of the method according to the invention with regard to O-shaping.
  • Figures 11 and 12 show a cross section through the same tool at different times.
  • Figures 13 and 14 show a respective side view and cross-sectional view of the same tool at different times.
  • the U-shape can be a U-shape produced by U-shaping or the U-preform produced according to the invention.
  • it can also be the intermediate form 16, which comes with the manufacturing step in Figure 5b was produced.
  • This intermediate form 16 then becomes a modification Figures 6 to 9 only one tool used for further O-shaping.
  • the legs 8 are first bent towards each other in a transverse direction Q by means of lateral mold jaws 31.
  • an upper die 32 begins to lower itself, so that in particular the ends 9 of the legs 8 are shaped towards one another and thereby the O-shaping, i.e. the production of a hollow profile with a closed cross section, is produced.
  • This forming process is completed in Figure 12 and 14 , in which the manufactured Sheet metal forming component 33 is shown. So that, in particular, the intermediate shape or U-shape does not tip over after being placed on the component holder 30, mandrels 34 are retracted at the ends. This retraction of the mandrels 34 takes place for the length section partially in the longitudinal direction of the intermediate mold 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Structure Of Printed Boards (AREA)
EP23193022.3A 2018-09-24 2019-09-20 Formage u-o d'un composant courbé selon trois axes spatiaux Pending EP4252931A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018123456.2A DE102018123456A1 (de) 2018-09-24 2018-09-24 U-O-Formen eines um drei Raumachsen gekrümmten Bauteils
EP19198564.7A EP3656480A3 (fr) 2018-09-24 2019-09-20 Formage u-o d'un composant courbé suivant trois axes spatiaux

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP19198564.7A Division EP3656480A3 (fr) 2018-09-24 2019-09-20 Formage u-o d'un composant courbé suivant trois axes spatiaux

Publications (2)

Publication Number Publication Date
EP4252931A2 true EP4252931A2 (fr) 2023-10-04
EP4252931A3 EP4252931A3 (fr) 2024-03-13

Family

ID=67998271

Family Applications (2)

Application Number Title Priority Date Filing Date
EP23193022.3A Pending EP4252931A3 (fr) 2018-09-24 2019-09-20 Formage u-o d'un composant courbé selon trois axes spatiaux
EP19198564.7A Pending EP3656480A3 (fr) 2018-09-24 2019-09-20 Formage u-o d'un composant courbé suivant trois axes spatiaux

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19198564.7A Pending EP3656480A3 (fr) 2018-09-24 2019-09-20 Formage u-o d'un composant courbé suivant trois axes spatiaux

Country Status (4)

Country Link
US (1) US11577294B2 (fr)
EP (2) EP4252931A3 (fr)
CN (1) CN110935759B (fr)
DE (1) DE102018123456A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11833570B2 (en) * 2018-03-30 2023-12-05 Nippon Steel Corporation Method for manufacturing shaped part
FR3113615A1 (fr) * 2020-08-27 2022-03-04 Faurecia Systemes D'echappement Procédé de mise en forme d’une pièce tubulaire comportant une cavité
CN112387820A (zh) * 2020-10-22 2021-02-23 国营芜湖机械厂 一种gh4169镍基高温合金箍带弯曲成形方法
CN112845697B (zh) * 2020-12-29 2022-09-16 东莞市创鑫鸿盛实业有限公司 一种用于钣金件生产的角度可调式折弯机及其折弯方法
CN115846471B (zh) * 2023-02-20 2023-05-02 江苏世烨鼎电子科技有限公司 一种三级联动折弯机

Citations (1)

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Publication number Priority date Publication date Assignee Title
CA2962236A1 (fr) 2014-10-03 2016-04-07 Nippon Steel & Sumitomo Metal Corporation Procede de fabrication d'un produit forme a la presse, et produit forme a la presse

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Also Published As

Publication number Publication date
DE102018123456A1 (de) 2020-03-26
EP4252931A3 (fr) 2024-03-13
EP3656480A2 (fr) 2020-05-27
EP3656480A3 (fr) 2020-06-24
US11577294B2 (en) 2023-02-14
US20200114408A1 (en) 2020-04-16
CN110935759A (zh) 2020-03-31
CN110935759B (zh) 2023-03-07

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