EP0107674B1 - Procede de fabrication de cannelure fermees - Google Patents

Procede de fabrication de cannelure fermees Download PDF

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Publication number
EP0107674B1
EP0107674B1 EP19830901184 EP83901184A EP0107674B1 EP 0107674 B1 EP0107674 B1 EP 0107674B1 EP 19830901184 EP19830901184 EP 19830901184 EP 83901184 A EP83901184 A EP 83901184A EP 0107674 B1 EP0107674 B1 EP 0107674B1
Authority
EP
European Patent Office
Prior art keywords
rib
ribs
notch
folding
closed
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
Application number
EP19830901184
Other languages
German (de)
English (en)
Other versions
EP0107674A1 (fr
Inventor
Robert Knobel
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.)
Zschokke Wartmann AG
Original Assignee
Zschokke Wartmann AG
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 Zschokke Wartmann AG filed Critical Zschokke Wartmann AG
Priority to AT83901184T priority Critical patent/ATE18639T1/de
Publication of EP0107674A1 publication Critical patent/EP0107674A1/fr
Application granted granted Critical
Publication of EP0107674B1 publication Critical patent/EP0107674B1/fr
Expired 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
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/02—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by pressing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements

Definitions

  • the invention relates to a method for producing closed ribs from sheet metal, in which each rib is formed by folding a piece of tape of a certain length.
  • the invention is based on the object of designing a method of the type described in the introduction such that, on the one hand, the devices required for shaping the closed ribs are simplified and the pressing forces can be reduced to form a practically eyelet-free rib head.
  • This object is achieved according to the invention in that prior to the formation of the ribs at at least one of the bending points provided at the ends of the rib legs for forming the ribs, a notching of the sheet metal surface running in the longitudinal direction of the ribs is carried out and that the notched, sheet metal sheet which is clamped on both sides is then formed into the fold exclusively by a folding force directed transversely to the notch.
  • the device shown schematically comprises two tensioning devices 1, 2, in which a band piece 3 of a steel band is clamped, the band part corresponding to the distance 4 between the tensioning devices 1, 2 being used to form a closed rib 5, see FIG. 2.
  • a force A is exerted perpendicularly to the surface of the band piece 3 by a folding sword (not shown).
  • the tensioning devices 1, 2 are moved against each other, either both tensioning devices 1, 2 or only one of the tensioning devices 1, 2 and the folding sword being laterally movable.
  • a folding force F is exerted on the piece of tape.
  • a comparatively large pressing force P for example in the order of 500 N / mm 2 sheet cross section with sheet thicknesses s of 1 to 1.5 mm, must be applied.
  • P a comparatively large pressing force
  • the formation of a rib eye 6 on the rib head 7 cannot be avoided, the width a of which is in any case greater than twice the sheet thickness.
  • the radius R forming at the base of the rib is also larger than the radius r provided for by the device.
  • a notch 8 is arranged at the location of the rib head 7 (FIG. 4) that is formed on the side of the band piece 3 opposite the outside of the rib head 7. The arrangement of the notch 8 determines the direction of the deflection of the belt section, which is why no folding sword has to be used.
  • the radius R at the base of the rib is also approximately the same as the radius r at the clamping devices 1, 2.
  • the deflection behavior of the band section, the folding force F k and the pressing force P k can be influenced to a large extent by forming the shape and the depth of the notch 8.
  • FIGS. 3 and 4 show a further possibility of forming a rib.
  • 3 and 4 is that in addition to the notch 8 in the area of the rib head 7, two further notches 11, 12 are formed in the area of the rib foot, but on the opposite side of the notch 8. In this case, too, a folding sword is no longer required.
  • the arrangement of the notches 11, 12 makes the folding force even smaller than if only the notch 8 is provided.
  • the pressing force P k does not become significantly smaller than in FIGS. 3 and 4 and can accordingly also be approximately 40% smaller than in the embodiment according to FIGS. 1 and 2.
  • the arrangement of the notches 11, 12 ensures that an almost sharp-edged transition occurs at the base of the rib, ie the radius R is substantially smaller than the radius r provided on the clamping devices 1, 2.
  • the deflection behavior, the folding force F k and the pressing force P k can be influenced to a considerable extent by the shape and the depth of the notches 11, 12.
  • the tensioning devices 1, 2 are designed such that the band section 4 between the tensioning devices 1, 2 and the band piece 3 in the tensioning devices 1, 2 essentially form a straight line. If the clamping surfaces are slightly inclined in such a way that the band piece 3 assumes a flat roof-like shape, the deflection side for the formation of the ribs 5 is additionally defined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

Avant la formation de la cannelure (5) entre deux pinces (1, 2), la bande de matière (3) est munie d'une encoche transversale (8) à l'endroit destiné à constituer la tête de la cannelure. La présence de cette encoche a pour effet de diminuer la force (Fk) et la pression (Pk) nécessaires pour plier le matériau. En outre, cette encoche diminue la sensibilité à la corrosion de la tête (7) de la cannelure.

Claims (4)

1 - Procédé de fabrication des corps en bande de tôle munis de cannelures fermées (5) dans lequel chaque cannelure (5) est formée par pliage d'un morceau de bande (3) de longueur déterminée, caractérisé en ce qu'avant le formage des cannelures (5) on realise, au moins à l'un des emplacements de pliage prévus aux extrémités des branches (9, 10) des cannelures, pour le formage des cannelures (5), une entaille (8, 11, 12) ménagée dans la surface de la tôle dans le sens de la longueur des cannelures et en ce que la bande de tôle entaillée, serrée des deux côtés est ensuite pliée exclusivement par l'action d'une force de pliage (Fk) orientée transversalement par rapport à l'entaille (8, 11, 12).
2 - Procédé selon la revendication 1, caractérisé en ce que l'entaille (8) est realisée à l'emplacement de pliage prévu au niveau de la tête (7) de la cannelure.
3 - Procédé selon la revendication 1 ou 2, caractérisé en ce que l'entaille (11, 12) est realisée aux emplacements de pliage prévus au niveau du pied de la cannelure.
4 - Procédé selon la revendication 1, caractérisé en ce qu'avant le formage des cannelures (5), les branches (9, 10) de la cannelure sont inclinées en forme de versants de toit, par exemple par serrage du morceau de bande (3) dans des dispositifs de serrage (1, 2) utilisés pour l'exécution de l'opération de pliage.
EP19830901184 1982-04-30 1983-04-21 Procede de fabrication de cannelure fermees Expired EP0107674B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83901184T ATE18639T1 (de) 1982-04-30 1983-04-21 Verfahren zum herstellen von mit geschlossenen rippen versehenen koerpern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2666/82 1982-04-30
CH266682A CH655259A5 (de) 1982-04-30 1982-04-30 Verfahren zum herstellen von mit geschlossenen rippen versehenen koerpern und nach dem verfahren hergestellte rippe.

Publications (2)

Publication Number Publication Date
EP0107674A1 EP0107674A1 (fr) 1984-05-09
EP0107674B1 true EP0107674B1 (fr) 1986-03-19

Family

ID=4238841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830901184 Expired EP0107674B1 (fr) 1982-04-30 1983-04-21 Procede de fabrication de cannelure fermees

Country Status (6)

Country Link
EP (1) EP0107674B1 (fr)
JP (1) JPS59500658A (fr)
CH (1) CH655259A5 (fr)
CS (1) CS244932B2 (fr)
DE (1) DE3362582D1 (fr)
WO (1) WO1983003784A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017144286A1 (fr) * 2016-02-23 2017-08-31 Koninklijke Philips N.V. Procédé de pliage de tôle métallique fabriquée dans un matériau à haute résistance sans fissures

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9504186D0 (sv) * 1995-11-23 1995-11-23 Electrolux Ab Förfarande för att åstadkomma ett tunnplåtsförband
DE102007004993A1 (de) * 2007-02-01 2008-08-07 Modine Manufacturing Co., Racine Herstellungsverfahren für Flachrohre und Walzenstraße

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2948197A (en) * 1958-04-25 1960-08-09 Stalker Corp Manufacture of blades
DE1160815B (de) * 1959-07-21 1964-01-09 Hoesch Ag Verfahren zur Herstellung von Profilen aus kaltgewalzten oder vergueteten Stahl- undNichteisenmetallbaendern
DE1452768A1 (de) * 1963-11-02 1969-06-12 Wiesbaden Gmbh Maschf Vorrichtung zur Herstellung des Blechmantels von Wellenkesseln fuer Transformatoren
US3368692A (en) * 1964-01-20 1968-02-13 Coniker Entpr Inc Pleated pocket forming method
CH463940A (de) * 1965-09-21 1968-10-15 Luwa Ag Verfahren und Vorrichtung zur Herstellung von Filtereinsätzen
FR1544252A (fr) * 1966-10-24 1968-10-31 Tetra Pak Ab Procédé de traitement d'un matériau d'emballage en feuille pourvu de lignes transversales de pliage
US3615964A (en) * 1968-09-20 1971-10-26 Ind Insulations Inc Method of forming creased fiber glass blanket
SE8102351L (sv) * 1981-04-13 1982-10-14 Plannja Ab Forfarande for att astadkomma bockning

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017144286A1 (fr) * 2016-02-23 2017-08-31 Koninklijke Philips N.V. Procédé de pliage de tôle métallique fabriquée dans un matériau à haute résistance sans fissures

Also Published As

Publication number Publication date
CH655259A5 (de) 1986-04-15
EP0107674A1 (fr) 1984-05-09
CS305683A2 (en) 1985-09-17
JPS59500658A (ja) 1984-04-19
CS244932B2 (en) 1986-08-14
DE3362582D1 (en) 1986-04-24
WO1983003784A1 (fr) 1983-11-10

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