EP2720813B1 - Procédé de fabrication de profilés creux fendus - Google Patents

Procédé de fabrication de profilés creux fendus Download PDF

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Publication number
EP2720813B1
EP2720813B1 EP12726804.3A EP12726804A EP2720813B1 EP 2720813 B1 EP2720813 B1 EP 2720813B1 EP 12726804 A EP12726804 A EP 12726804A EP 2720813 B1 EP2720813 B1 EP 2720813B1
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EP
European Patent Office
Prior art keywords
hollow profile
blank
length
areas
cross
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.)
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Application number
EP12726804.3A
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German (de)
English (en)
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EP2720813B2 (fr
EP2720813A1 (fr
Inventor
Thomas Flehmig
Michael BRÜGGENBROCK
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.)
ThyssenKrupp Steel Europe AG
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ThyssenKrupp Steel Europe AG
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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
    • 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
    • B21C37/065—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 starting from a specific blank, e.g. tailored blank
    • 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
    • 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

Definitions

  • the invention relates to a method for the production of slotted hollow profiles from a cut board, wherein the hollow profile of the substantially planar board using the Einrolltechnik or using a UO-forming is made, so that the hollow profile in the axial direction of a slot along the abutting edges the platinum blank has provided in the locally provided cross-sectional areas a greater circumferential length than the necessary Einformmother, so that in the forming of the platinum blank to a closed hollow profile, the opposite edges of the formed platinum blank abut each other and during the forming into the final shape at least the At the edge impact adjacent surfaces of the hollow profile in the circumferential direction are at least partially compressed.
  • slot profiles which from a substantially planar board using a UO-forming or using the Einrolltechnik, which is also known under the name InnForm T 3 ® technology of the Applicant, manufactured and joined cohesively along the longitudinal slot are known from the prior art.
  • a rolling-(InnForm T 3 ®) is the production of a hollow section of a platinum cut using a multi-page press, individual presses or press lines, For example, as a follow-on composite, understood, with the presses usually flat platinum blank usually by forming and bending operations with or without the use of a mold core reshape.
  • a substantially planar board blank is first formed into a U-shape using a corresponding punch and die, and then formed into an O-shape using a second die.
  • the UO-forming can also be done in press lines. Both in the application of Einrolltechnik as well as when using the UO-forming but it comes to spring back and elastic and / or plastic distortions in the sheet metal plane, so that the required dimensional and dimensional accuracy when joining a closed hollow profile is not sufficient.
  • the springbacks and distortions of the board material which occur especially in higher-strength and ultra-high strength steels, cause deviations from the desired contour at the edge impact occur before welding.
  • the slot of the hollow profile for example, deviations from its nominal width, so that problems in welding the slotted hollow profiles can occur.
  • German patent DE 103 29 424 B4 It is known to select the board blank in the production of hollow profiles with a longitudinally variable cross-section so that in the transition areas, a material surplus or a lack of material is provided so that no material thickening or thinning at the transition areas occur when forming the hollow profile.
  • German patent specification DE 100 45 938 C1 a method for the production of closed hollow profiles, in which the opposite edges of the board blank can be completely brought to shock in order to be able to be welded in a simple manner without using filler materials can. This is achieved by first bending or roll forming the board blank in a form-bending tool so that the longitudinal edges of the blank are bumped.
  • the sheet metal blank is compressed by an axial punch in the axial direction, so that the abutting edges abut properly on impact and a Peripheral bead is generated in the truncated cone sections of the hollow profile.
  • this axial compression requires an additional Axialstempel and basically still another step.
  • the present invention has the object to provide a method for the production of closed hollow profiles available with which in a simple way combinatorial slotted hollow profiles can be produced, which can be easily joined to closed hollow sections.
  • the object is achieved in the generic method in that the excess length of the circumferential length of the blank sheet is distributed symmetrically on both edge regions.
  • the excess length is distributed symmetrically on both edge regions, in order to facilitate the forming of the board blank and the upsetting of the hollow profile.
  • the provision of dimensionally stable edge impact of the slotted hollow profile can be provided by the fact that the excess length of the peripheral length of the board cut in the locally provided cross-sectional areas is at least 1% to 10%, preferably 2% to 5% of the necessary Einformpen ,
  • the nominal circumferential length in the locally provided cross-sectional areas corresponds to the actual required extent for providing the cross-sectional area in this area.
  • the method according to the invention can be further improved by upsetting the hollow profile over its entire cross section. This is the case in particular if the hollow profile has a round, for example a circular or an elliptical cross-sectional area.
  • the hollow profile is compressed along the entire edge impact. This ensures that the springback of the hollow profile over the entire axial length of the edge impact is reduced and thus a high-dimensional edge impact can be provided.
  • the hollow profile produced has a round cross-section at least in regions, the hollow profile in these regions can be compressed over the entire cross-section via the method according to the invention.
  • the hollow profile produced at least partially a box-shaped or polygonal cross-section, so that in particular at least the voltage applied to the edge impact surfaces of the hollow profile can be compressed using the method according to the invention and also a high-dimensional edge impact can be provided.
  • the method according to the invention can be applied to any desired cross-sectional shape, wherein any combination, for example round / elliptical / box-shaped, is also possible in the longitudinal direction.
  • the excess length in particular in connection with the tool design, can also be dimensioned such that it has a minimization of springback in all other surfaces.
  • the method can be further developed in that the provided at the edge impact slot of the Hollow profile after forming, in particular using a laser beam is welded. Due to the high-dimensional edge joints, which can be realized with the method according to the invention, it does not matter in the production process according to the invention whether the closed hollow profile to be produced has regionally different cross-sectional areas. Regardless of how as well as the cross-sectional area itself is formed, a upsetting of the surfaces involved in the edge impact surfaces of the hollow profile and thus a dimensionally stable formation of edge impact occurs via the inventive method.
  • Fig. 1 in a perspective view a board blank 1 shown, which at the edge regions 1a, 1b, which form the later edge impact of the hollow profile, has a length excess.
  • the necessary Einformin, ie the circumferential length of the board is marked, which is needed for the provision of the cross-sectional area.
  • Fig. 2, 3 and 4 Now, the individual forming steps of a UO deformation of the board blank 1 are shown in a perspective view.
  • the board blank 1 is first formed into a U-shape, Fig. 2 , This is usually done with a first die half using a punch, which transforms the flat board blank 1 in the U-shape.
  • As the board is further reshaped, as in FIG Fig.
  • the U-shape initially closed this is often achieved using an upper die half, so that the edge portions 1a, 1b of the board blank 1 abut against each other.
  • the edge portions 1a, 1b abut each other and lead to a compression of the hollow profile over the entire cross section. Due to the compression, the springback of the board blank is greatly reduced, so that a particularly dimensionally stable longitudinal slot 2 of the hollow profile can be made available.
  • the compression of the hollow profile takes place in the circumferential direction, as the arrows in Fig. 4 suggest.
  • the Longitudinal slot 2 is particularly suitable for carrying out a laser beam welding, since the laser beam welding requires due to the small extent of the weld zone special requirement for dimensional accuracy of the slot.
  • Fig. 4 can be seen, the formed into a longitudinally slotted hollow profile board blank 1 is compressed over its entire axial length in the circumferential direction. However, it is also conceivable to compress the board blank 1 only in the areas which are needed for the provision of a longitudinal slot to be welded.
  • FIG. 5 Another embodiment of a board blank 3 shows Fig. 5 in a perspective view.
  • the board blank 3 is intended for the use of Einrolltechnik.
  • a substantially flat board blank is preferably formed into a hollow profile using a multi-side press, single presses or press lines using a mandrel 4.
  • Fig. 5 3a, 3b denotes the circumferential length provided for the provision of the local cross section.
  • the beyond edge regions of the board blank 3 are used according to the invention for compression of the board blank during the forming of the board blank 3 in the final form.
  • the length excess of the board blank 3 can be varied in the circumferential direction variable depending on the shape of the hollow profile to be produced. It has been found that a choice of the length excess in the circumferential length of the blank blank of at least 1% to 10% of the necessary circumferential length or the Einformin, preferably 2% to 5% of the necessary Einformin particularly good results in terms of providing highly dimensionally, longitudinally slotted hollow profiles leads.
  • Fig. 6 the board cut already formed into a preform 3, which is formed using a mandrel 4, a lower die half 5 and an upper die half 6 to the final shape.
  • the over the axial length provided length excess of Blankenzuitess in the circumferential direction is used to compress the hollow profile to be produced before forming in the final shape, so that the springback is significantly reduced during the deformation of the board blank to a slotted hollow profile.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Laser Beam Processing (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (7)

  1. Procédé de fabrication de profilés creux fendus à partir d'une platine découpée (1, 3), dans lequel le profilé creux est fabriqué à partir de la platine essentiellement plane (1, 3) en utilisant une technique de roulage ou en utilisant une transformation U-O, de sorte que le profilé creux présente une fente (2) s'étendant dans le sens axial le long des bords de butée de la platine déformée, la découpe de platine (1, 3) ayant, dans les sections transversales prévues localement, une longueur circonférentielle supérieure à la longueur de transformation nécessaire, de sorte que, lors de la transformation de la découpe de platine (1, 3) en un profilé creux fermé, les bords opposés (1a, 1b, 3a, 3b) de la découpe de platine transformée butent les uns contre les autres et qu'au moins les surfaces adjacentes à la jointure des bords du profilé creux sont au moins partiellement refoulées dans le sens circonférentiel pendant la transformation en forme finale, caractérisé en ce que l'excédent de longueur de la longueur circonférentielle de la découpe de platine (1, 3) est réparti symétriquement sur les deux zones des bords.
  2. Procédé selon la revendication 1, caractérisé en ce que l'excédent de longueur de la découpe de platine (1, 3) est, dans les sections transversales prévues localement, de l'ordre d'au moins 1% à 10 %, de préférence 2 % à 5 %, de la longueur de formage nécessaire.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le profilé creux est refoulé sur toute sa section transversale.
  4. Procédé selon une des revendications 1 à 3, caractérisé en ce que le profilé creux est refoulé le long de toute la jointure des bords.
  5. Procédé selon une des revendications 1 à 4, caractérisé en ce que le profilé creux fabriqué présente une section transversale ronde au moins par endroits.
  6. Procédé selon une des revendications 1 à 5, caractérisé en ce que le profilé creux fabriqué présente une section transversale en forme de caisson ou angulaire au moins par endroits et la longueur circonférentielle agrandie est prévue au moins dans les surfaces qui sont adjacentes à la jointure des bords.
  7. Procédé selon une des revendications 1 à 6, caractérisé en ce que la fente prévue sur la jointure des bords du profilé creux est soudée, en particulier en utilisant un rayon laser, après transformation.
EP12726804.3A 2011-06-17 2012-06-11 Procédé de fabrication de profilés creux fendus Active EP2720813B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011051160A DE102011051160A1 (de) 2011-06-17 2011-06-17 Verfahren zur Herstellung geschlitzter Hohlprofile
PCT/EP2012/061002 WO2012171875A1 (fr) 2011-06-17 2012-06-11 Procédé de fabrication de profilés creux fendus

Publications (3)

Publication Number Publication Date
EP2720813A1 EP2720813A1 (fr) 2014-04-23
EP2720813B1 true EP2720813B1 (fr) 2014-10-01
EP2720813B2 EP2720813B2 (fr) 2018-06-27

Family

ID=46246080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12726804.3A Active EP2720813B2 (fr) 2011-06-17 2012-06-11 Procédé de fabrication de profilés creux fendus

Country Status (8)

Country Link
US (1) US8833128B2 (fr)
EP (1) EP2720813B2 (fr)
JP (1) JP5706042B2 (fr)
KR (1) KR101974963B1 (fr)
CN (1) CN103608132B (fr)
DE (1) DE102011051160A1 (fr)
ES (1) ES2526888T5 (fr)
WO (1) WO2012171875A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6341292B2 (ja) * 2014-10-03 2018-06-13 新日鐵住金株式会社 プレス成形品の製造方法
RU2683673C2 (ru) * 2015-02-25 2019-04-01 Ниппон Стил Энд Сумитомо Метал Корпорейшн Формованное металлическое изделие, включающее в себя трубчатую часть с щелью, способ изготовления такого изделия и устройство и матричный узел, используемые в способе изготовления такого изделия
JP6989818B2 (ja) * 2017-03-27 2022-01-12 株式会社ワイテック 金属管の製造方法
DE102018123456A1 (de) * 2018-09-24 2020-03-26 Benteler Automobiltechnik Gmbh U-O-Formen eines um drei Raumachsen gekrümmten Bauteils
CN110000523A (zh) * 2019-05-13 2019-07-12 赵宫鼎 一种钣金制作工艺及其板状产品
CN111069362A (zh) * 2019-12-27 2020-04-28 舆软科技(上海)有限责任公司 一种管状零件的成形方法
CN111872632B (zh) * 2020-06-12 2023-06-20 中国二冶集团有限公司 一种开口管道制作方法

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Also Published As

Publication number Publication date
ES2526888T5 (es) 2018-10-22
CN103608132A (zh) 2014-02-26
ES2526888T3 (es) 2015-01-16
EP2720813B2 (fr) 2018-06-27
EP2720813A1 (fr) 2014-04-23
US20140096579A1 (en) 2014-04-10
JP5706042B2 (ja) 2015-04-22
DE102011051160A1 (de) 2012-12-20
KR101974963B1 (ko) 2019-05-03
CN103608132B (zh) 2016-05-25
KR20140034913A (ko) 2014-03-20
US8833128B2 (en) 2014-09-16
JP2014516801A (ja) 2014-07-17
WO2012171875A1 (fr) 2012-12-20

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