EP3302841B1 - Procédé de fabrication de tubes fendus en feuilles de tôle - Google Patents

Procédé de fabrication de tubes fendus en feuilles de tôle Download PDF

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Publication number
EP3302841B1
EP3302841B1 EP16727679.9A EP16727679A EP3302841B1 EP 3302841 B1 EP3302841 B1 EP 3302841B1 EP 16727679 A EP16727679 A EP 16727679A EP 3302841 B1 EP3302841 B1 EP 3302841B1
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EP
European Patent Office
Prior art keywords
bending
sheet
metal sheet
bent
tube
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.)
Active
Application number
EP16727679.9A
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German (de)
English (en)
Other versions
EP3302841A1 (fr
Inventor
Mario THOME
Manfred Kolbe
Uwe Feldmann
Jochen Vochsen
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.)
SMS Group GmbH
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SMS Group GmbH
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Publication date
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Publication of EP3302841A1 publication Critical patent/EP3302841A1/fr
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Publication of EP3302841B1 publication Critical patent/EP3302841B1/fr
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    • 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
    • B21D5/01—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
    • 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
    • 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
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means

Definitions

  • the invention relates to a method for producing slotted tubes from sheet metal plates, in particular thick metal sheets, wherein provided on their longitudinal sides with bevelled metal sheet a tube forming press, in which it rests on one of two horizontally spaced support bodies existing lower tool from a raised and lowered Upper tool is formed by applying a bending force progressively to the laterally seam welding with a gap opposite, longitudinal side bending edge having slot tube.
  • a tube forming press in which it rests on one of two horizontally spaced support bodies existing lower tool from a raised and lowered Upper tool is formed by applying a bending force progressively to the laterally seam welding with a gap opposite, longitudinal side bending edge having slot tube.
  • a pipe forming or tube bending press has usually in a base frame one of two laterally spaced juxtaposed support or bending bodies existing lower tool and a vertically engageable from above against the lower die, carried by a raisable and lowerable bending bar, over the entire length the metal sheet extending upper tool with which a bending force can be applied to the resting on the lower die metal sheet.
  • the metal sheet is pre-bent at the longitudinal edges in a first step, usually in a separate edge banding press.
  • the pre-bending of the longitudinal edges is carried out so that the tube radius in the deformation of the slot tube in the region of the later seam, where the longitudinal edges of the bent to the tube sheet metal plates are opposed to Lssensnahtsch facedung with a gap uniformly formed.
  • the thus pre-bent metal sheet is then inserted into the pipe molding press and there the subjected to actual bending process.
  • a bending force is applied to the metal sheet by depressing the press upper part, which sets under the action of the bending load value and carried by this, upper mold a deformation of the metal sheet. This procedure is repeated several times until the metal sheet has been converted to the slot pipe.
  • the metal sheet rests flat on one of the support or bending bodies, while a longitudinal or bending edge rests only with slight overlap on the other support or bending body, so that in the application of the bending force by the bending load this longitudinal or bending edge of the support or bending body can slip and thus the bending process must be canceled.
  • the invention is therefore an object of the invention to provide a method of the type mentioned without the disadvantages described, so that the metal sheet from the beginning without problems progressively transform or can be molded.
  • the metal sheet After a first semicircular shape of the metal sheet has been produced in accordance with the procedure described above, the metal sheet is moved so far on the support bodies that starting with the second bending step at the other, opposite bending edge according to the above-explained mit method, the second semicircular shape of the metal sheet is bent.
  • a preferred measure according to the invention provides that for carrying out the second bending step following the second bending step in the second bending section for forming the first bending section, the metal sheet is laterally withdrawn and prepositioned at a steep angle between the lower tools with support of the bending edge on one of the support bodies.
  • An advantageous proposal of the invention provides that at least in relation to the immersed from the longitudinal axis of the progressively formed metal sheet upper tool predetermined once left-sided and once right-hand bending step is made with respect to the other bending steps lower indentation, and that finally by applying a From the outside on this non-circular preform in each case targeted in the previously on both sides of the middle of small molded areas impacting Zudrückkraft the finished slot tube is formed.
  • z. B. is generated with a bend of 12 ° instead of a bend of 24 °, can form a largely circular slot tube geometry with minimal slot.
  • FIG. 1 On as such a well-known tube forming press 1 is after FIG. 1 one on their long sides with Anbiegekanten 2, 3 provided sheet metal plate 4 to a finished slotted pipe or reshaped.
  • a two horizontally spaced support body 6a, 6b-pointing lower tool 7 is provided, wherein the forming force is applied by a raisable and lowerable bending rate 8.
  • the metal sheet 4 At the beginning of the forming process, the metal sheet 4 is positioned with respect to the bending rate 8 so that in the first forming or bending step, the forming force exerted by the bending rate 8 acts on the first bending section 101 following the bending edge 3, the bending edge 3 acting against the bending edge Support body 6b is pressed.
  • the transformation of a metal sheet 3 to a slit pipe 5 according to the Figures 2 and 3 is performed in the pilgrim step method.
  • the first forming or bending step in the second bending section 102 following the bending edge 3 is performed according to exemplary bending sections 101 to 106 and 107 to 112 and 113 of the slot tube 5.
  • the bending edge 3 is thereby supplemented by the width of the first bending section 101 with a sufficiently large support surface pressed against the support body 6b and thus can not slip during the forming process.
  • the metal sheet is moved laterally from an example manipulator to the left and pre-positioned at a steep angle between the support bodies 6a, 6b due to the already deformed or pre-bent second bending portion 102 sufficient contact surface of the bending edge 3 on the support body 6b.
  • the bending force exerted by means of the bending rate value 8 acts on the first bending section 101 following the bending edge 3 (cf. Fig. 3 and 4 ).
  • the following forming or bending steps can continue to proceed in the vocational step method, in which case the subsequent bending steps corresponding to the order of the bending sections 104, 103, 106, 105 for the first and right semicircle 10 of the slot tube 5 (see Fig. 4 ).
  • the metal sheet 4 is positioned with the bending edge 2 on the support body 6a, in which case the bending steps in the mit step method analogous to the above-described deformation of the first semicircle 10 in the order of the bending sections 108, 107th , 110, 109, 112, 111, 113 (cf. Fig. 4 ).
  • a smaller bending of the metal sheet 4 can be selectively carried out than in the other bending sections become.
  • the Zudrückkraft for producing the finished, largely circular slot tube 5 is applied from the outside to the non-circular preform 13 on the bending bar 8.
  • the non-circular preform 13 is positioned so that the less molded portion 12a located to the left of the slit 14 is at a nine o'clock position as in FIG FIG. 5A shown.
  • the second press bending step is - in the same sequence as before - in FIG. 5B illustrated.
  • the preform 13 which is still non-circular in its right-hand semicircle 10
  • the area 12b which is formed less to the right of the slot or gap 14, occupies a three o'clock position.
  • the applied by the bending load 8 now on this side of the preform 13 Zudrückkraft F brings the non-circular preform 13 in the final, largely circular shape of the finished slot tube 5 with a thereby achieved small slot or gap 14 (Fig. Fig. 5B Right figure on the outside).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (3)

  1. Procédé pour la fabrication de tubes à fente (5) à partir de plaques en tôle (4), en particulier de plaques épaisses en tôle ; dans lequel une plaque en tôle (4) munie d'arêtes de pliage (2, 3) sur ses côtés longitudinaux est acheminée à une presse de moulage de tubes (1), dans laquelle elle est moulée par l'intermédiaire d'un outil supérieur (8) apte à se soulever et à s'abaisser en s'appuyant sur un outil inférieur (7) constitué par deux corps de support (6a, 6b) disposés à l'écart l'un de l'autre en direction horizontale, via l'application d'une force de pliage, pour obtenir de manière progressive le tube à fente (5) présentant des arêtes de pliage longitudinales (2, 3) opposées l'une à l'autre pour former une soudure longitudinale de joint ultérieure comprenant une fente (14), caractérisé en ce que, au moins les tronçons de pliage qui se suivent en étant directement voisins depuis respectivement l'extérieur vers l'intérieur (de 101 à 106, respectivement de 107 à 113) sont transformés dans le procédé du type à pas de pèlerin en se démarquant d'une succession d'étapes de pliage croissant de manière numérique.
  2. Procédé selon la revendication 1, caractérisé en ce que, pour la mise en oeuvre de la deuxième étape de pliage qui suit la première étape de pliage réalisée dans le deuxième tronçon de pliage (102, respectivement 108) pour la transformation du premier tronçon de pliage (101, respectivement 107), la plaque en tôle (4) est rétractée en direction latérale et est prépositionnée en formant un angle aigu entre les outils inférieurs (6a, 6b), les arêtes de pliage (2, 3) venant s'appuyer sur un des corps de support (6a, 6b).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, au moins dans une étape de pliage une fois à gauche et une fois à droite par rapport au milieu prédéfini de l'axe longitudinal de l'outil supérieur (8) pénétrant dans la plaque en tôle (4) moulée de manière progressive, on procède à un moulage inférieur par rapport à celui des autres étapes de pliage ; et en ce que, pour conclure, par application d'une force de fermeture (F) agissant de manière ciblée dans les zones (12a, 12b) soumises à un moulage inférieur précédent des deux côtés du milieu, on façonne le tube à fente prêt à l'emploi (5).
EP16727679.9A 2015-06-03 2016-06-02 Procédé de fabrication de tubes fendus en feuilles de tôle Active EP3302841B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015210259.9A DE102015210259B4 (de) 2015-06-03 2015-06-03 Verfahren zum Herstellen von Schlitzrohren aus Blechtafeln
PCT/EP2016/062556 WO2016193395A1 (fr) 2015-06-03 2016-06-02 Procédé de fabrication de tubes fendus en feuilles de tôle

Publications (2)

Publication Number Publication Date
EP3302841A1 EP3302841A1 (fr) 2018-04-11
EP3302841B1 true EP3302841B1 (fr) 2018-09-12

Family

ID=56112950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16727679.9A Active EP3302841B1 (fr) 2015-06-03 2016-06-02 Procédé de fabrication de tubes fendus en feuilles de tôle

Country Status (7)

Country Link
US (1) US11097326B2 (fr)
EP (1) EP3302841B1 (fr)
CN (1) CN108076631B (fr)
BR (1) BR112017026098B1 (fr)
DE (1) DE102015210259B4 (fr)
RU (1) RU2690735C1 (fr)
WO (1) WO2016193395A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7121559B2 (ja) 2018-06-26 2022-08-18 川崎重工業株式会社 曲げ加工方法及び曲げ加工システム
DE102018211311B4 (de) * 2018-07-09 2020-03-26 Sms Group Gmbh Erweiterte Regelung JCO-Formpresse

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FR2210462B1 (fr) * 1972-12-15 1976-08-27 Heraud
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DE4226402C2 (de) * 1992-08-10 1994-06-01 Althaus P Gerhard Dr Ing Verfahren zur Herstellung von langen dickwandigen Rohren durch Biegen aus einer Metallplatte und Vorrichtung zur Ausführung des Verfahrens
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JP3741474B2 (ja) * 1996-02-23 2006-02-01 株式会社小松製作所 曲げ加工機における曲げ順番選定方法および選定装置
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Also Published As

Publication number Publication date
WO2016193395A1 (fr) 2016-12-08
RU2690735C1 (ru) 2019-06-05
BR112017026098B1 (pt) 2021-06-15
US20180169727A1 (en) 2018-06-21
DE102015210259B4 (de) 2016-12-15
EP3302841A1 (fr) 2018-04-11
DE102015210259A1 (de) 2016-12-08
CN108076631A (zh) 2018-05-25
CN108076631B (zh) 2020-09-22
US11097326B2 (en) 2021-08-24

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