WO1983003784A1 - Method for making closed grooves and body obtained thereby - Google Patents

Method for making closed grooves and body obtained thereby Download PDF

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Publication number
WO1983003784A1
WO1983003784A1 PCT/CH1983/000049 CH8300049W WO8303784A1 WO 1983003784 A1 WO1983003784 A1 WO 1983003784A1 CH 8300049 W CH8300049 W CH 8300049W WO 8303784 A1 WO8303784 A1 WO 8303784A1
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WO
WIPO (PCT)
Prior art keywords
rib
ribs
notch
folding
head
Prior art date
Application number
PCT/CH1983/000049
Other languages
German (de)
French (fr)
Inventor
Robert Knobel
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/en
Priority to DE8383901184T priority patent/DE3362582D1/en
Publication of WO1983003784A1 publication Critical patent/WO1983003784A1/en

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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 the production of bodies provided with closed ribs from sheet metal, in which each rib is formed by folding a piece of tape of a certain length and a rib produced by the method.
  • the closed rib produced by the method according to the invention is characterized by the fact that it has legs that lie over the entire height of the rib and that the rib head is practically without a rib eyelet.
  • the invention is shown in the drawing in two exemplary embodiments and is described below. Show it:
  • FIG. 1 is a schematic representation of a device for forming a rib from a belt section according to a known method
  • FIG. 2 shows a schematic representation of the device according to FIG. 1 at the end of the formation of the closed ribs
  • FIG. 3 shows a schematic representation of a device for producing a closed rib according to the method according to the invention at the beginning of the molding process
  • Fig. 5 shows a schematic representation of a device according to FIGS. 3 and 4 for producing a closed rib, according to a variant of the method according to the invention at the beginning of the shaping of the rib and
  • the schematically illustrated device u comprises two tensioning devices 1, 2, in which a band piece 3 of a steel band is clamped, the band section corresponding to the distance 4 between the tensioning devices 1, 2 for the formation of a closed rib 5 is used, see FIG. 2.
  • FIGS. 3 and 4 similar clamping devices 1, 2 as in FIGS. 1 and 2 are used for the formation of the closed rib, but here the use of the folding sword moved transversely to the band piece can be omitted, which also means the relatively complex coordination of the Speeds of the tensioning devices 1, 2 and the folding sword are not required. It is important here that at the location of the rib head 7 that forms (Fig. 4) a notch 8 is arranged on the opposite side of the rib head 7 of the band piece 3. The arrangement of the notch 8 determines the direction of the deflection of the belt section, which is why no folding sword is used.
  • Folding forces Fk. required and likewise the pressing force P to be used at the end of the folding process can be considerable, e.g. by about 40%.
  • the rib width a is the same over the entire rib height and is approximately equal to twice the band thickness s, while for the formation of the rib 5 according to FIGS. 1 and 2, the rib width a on the rib head 7 is more than twice that Band strength s is.
  • the radius R on the rib base is also approximately the same as the radius r on the clamping devices 1, 2.
  • FIGS. 5 and 6 show a further possibility of forming a rib.
  • the difference from that 3 and 4 consists in 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 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 means that an almost sharp-edged transition arises at the base of the rib, i.e. 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 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

Before forming the groove (5) between two clamps (1, 2), the strip of material (3) is provided with a transverse notch (8) at the site where the groove head is intended to be formed. The notch allows to decrease the force (Fk) and the pressure (Pk) required to fold the material. Furthermore, said notch decreases the corrosion sensitivity of the groove head (7).

Description

Verfahren zum Herstellen 'von mit geschlossenen Rippen versehenen Körpern und nach dem Verfahren hergestellte Rippe Process for producing closed-ribbed bodies and rib made by the process
Die Erfindung betrifft ein Verfahren zum Herstellen von mit geschlossenen Rippen versehenen Körpern aus Bandblech, bei dem jede Rippen durch Falten eines Bandstückes be¬ stimmter Länge geformt wird und eine nach dem Verfahre hergestellte Rippe.The invention relates to a method for the production of bodies provided with closed ribs from sheet metal, in which each rib is formed by folding a piece of tape of a certain length and a rib produced by the method.
Für die Herstellung von mit geschlossenen Rippen ver¬ sehenen Körpern ist es bekannt, diese auf einer speziell hierzu geeigneten Faltpresse herzustellen. Das hierzu verwendete Blech wird gewöhnlich von Rollen abgewickelt, und schrittweise in die Faltpresse eingeführt. In dieser wird eine der Form der herzustellenden Rippen entsprechende Partie in Einspannvorrichtungen eingespannt, worauf ein sogenanntes Faltschwert senkrecht zum Band bewegt und da¬ durch die dem Rippenkopf entsprechende Stelle ausgelenkt wird, während gleichzeitig die Rippenbildung durch Zusam¬ menschieben der Spannvorrichtungen erfolgt. Da diese Art der Rippenbildung allgmein bekannt ist, wird auf weitere Details nicht eingegangen. Hierfür siehe beispielsweis DE-OS 14 52 768. Für das Formen der Rippen sind erhebliche Kräfte erforder¬ lich, da es im Hinblick auf die Fertigungsgenauigkeit vor¬ teilhaft ist, wenn die Rippe nach Aufheben der Presskraft möglichst wenig zurückfedert.For the production of bodies provided with closed ribs, it is known to produce them on a folding press which is especially suitable for this purpose. The sheet used for this is usually unwound from rolls and gradually introduced into the folding press. In this a section corresponding to the shape of the ribs to be produced is clamped in clamping devices, whereupon a so-called folding sword is moved perpendicular to the belt and thereby deflected by the point corresponding to the rib head, while at the same time the ribs are formed by pushing the clamping devices together. Since this type of rib formation is generally known, no further details will be given. For this see, for example, DE-OS 14 52 768. Considerable forces are required for shaping the ribs, since it is advantageous with regard to the manufacturing accuracy if the rib springs back as little as possible after the pressing force has been released.
Wenn auch mit dieser Art der Formung der Rippen ein sattes Anliegen der Rippenschenkel erreicht wird, ist doch nicht zu vermeiden, dass am Rippenkopf, selbst bei Aufbringen sehr grosser Presskräfte, eine Rippenöse entsteht. Die Bildung einer solchen Rippenöse ist nicht erwünscht, da sie eine Stelle beginnender Korrosion darstellt.Even if this type of shaping of the ribs provides a snug fit of the rib legs, it cannot be avoided that a rib eyelet is formed on the rib head, even when very large pressing forces are applied. The formation of such a rib eyelet is not desirable since it represents a point of beginning corrosion.
Hier setzt die Erfindung ein, der die Aufgabe zugrunde¬ liegt, ein Verfahren der eingangs beschriebenen Art so auszugestalten, dass einerseits die zum Formen der ge¬ schlossenen Rippen erforderlichen Vorrichtungen verein¬ facht und die Presskräfte unter Bildung eines praktisch ösenfreien Rippenkopfes vermindert werden können.This is where the invention comes in, which is based on the object of designing a method of the type described at the outset in such a way 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.
Diese Aufgabe wird gemäss der Erfindung dadurch gelöst, dass vor dem Formen der Rippen an mindestens einer der an den Enden der Rippenschenkel vorgesehenen Biegestellen zum Formen der Rippen eine in der Längsrichtung der Rip¬ pen verlaufende Kerbung der Blechoberfläche durchgeführt wird.This object is achieved according to the invention in that prior to the formation of the ribs, at least one of the bending points provided at the ends of the rib legs for forming the ribs is notched in the longitudinal direction of the ribs of the sheet metal surface.
Die nach dem erfindungsgemässen Verfahren hergestellte geschlossene Rippe kennzeichnet sich dadurch, dass sie über der gesamten Rippenhöhe anliegende Schenkel aufweist und der Rippenkopf praktisch ohne Rippenöse ausgebildetist. Die Erfindung ist in der Zeichnung in zwei Ausführungs¬ beispielen dargestellt und nachfolgend beschrieben. Es zeigen:The closed rib produced by the method according to the invention is characterized by the fact that it has legs that lie over the entire height of the rib and that the rib head is practically without a rib eyelet. The invention is shown in the drawing in two exemplary embodiments and is described below. Show it:
Fig. 1 eine schematische Darstellung einer Vorrich¬ tung zur Bildung einer Rippe aus einer Bandpartie nach einem bekannten Verfahren,1 is a schematic representation of a device for forming a rib from a belt section according to a known method,
Fig. 2 eine schematische Darstellung der Vorrich¬ tung nach Fig. 1 am Ende der Bildung der geschlossenen Rippen,2 shows a schematic representation of the device according to FIG. 1 at the end of the formation of the closed ribs,
Fig. 3 eine schematische Darstellung einer Vorrich¬ tung zur Herstellung einer geschlossenen Rippe nach dem erfindungsgemässen Verfahren zu Beginn des Formvorgangs und3 shows a schematic representation of a device for producing a closed rib according to the method according to the invention at the beginning of the molding process and
Fig. 4 nach Beendigung des Formens der Rippen,4 after completion of the formation of the ribs,
Fig-. 5 eine schematische Darstellung einer Vorrich¬ tung nach Fig. 3 und 4 zur Herstellung einer geschlossenen Rippe., nach einer Variante des erfindungsgemässen Verfahrens zu Beginn des Formens der Rippe undFig. 5 shows a schematic representation of a device according to FIGS. 3 and 4 for producing a closed rib, according to a variant of the method according to the invention at the beginning of the shaping of the rib and
Fig. 6 am Ende nach dem Formen der geschlossenen Rippe.Fig. 6 at the end after forming the closed rib.
In Fig. 1 und 2 ist die Herstellung einer geschlossenen Rippe nach einem bekannten Verfahren dargestellt. Die schematisch dargestellte Vorrichtung u fasst zwei Spann¬ vorrichtungen 1, 2, in denen ein Bandstück 3 eines Stahl¬ bandes eingespannt ist, wobei die dem Abstand 4 zwischen den Spannvorrichtungen 1, 2 entsprechende Bandpartie für die Bildung einer geschlossenen Rippe 5 verwendet wird, siehe Fig. 2.1 and 2 show the production of a closed rib by a known method. The schematically illustrated device u comprises two tensioning devices 1, 2, in which a band piece 3 of a steel band is clamped, the band section corresponding to the distance 4 between the tensioning devices 1, 2 for the formation of a closed rib 5 is used, see FIG. 2.
Zur Bildung der Rippe 5 wird von einem nicht dargestellten Falt¬ schwert eine Kraft A senkrecht zur Fläche desTo form the rib 5, a force A perpendicular to the surface of the
Bandstückes 3 ausgeübt. Gleichzeitig werden die Spann¬ vorrichtungen 1, 2 gegeneinander bewegt, wobei entweder beide SpannVorrichtungen 1, 2 oder nur eine der Spannvorich- tungen 1, 2 und das Faltschwert seitlich beweglich sind. Beim Zusam¬ menfahren der' Spannvorrichtungen 1, 2 wird auf das Band¬ stück eine Faltkraft F ausgeübt. Für die einwandfreie Herstellung der geschlossenen Rippe 5 ist es erforderlich, die Geschwindigkeit v. der SpannVorrichtungen mit der Hori¬ zontalgeschwindigkeit des Faltschwertes aufeinander abzu¬ stimmen, was einen entsprechenden Steuerungsauf and be¬ dingt. Am Schluss des Faltvorganges muss eine verhältnis- mässig grosse Presskraft P, z.B. in der GrössenordnungBand piece 3 exercised. At the same time, 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. When the tensioning devices 1, 2 move together, a folding force F is exerted on the piece of tape. For the proper production of the closed rib 5, it is necessary to speed v. the fixtures with the Hori¬ zontalgeschwindigkeit vote of the folding bracing successive ERS ¬, which hires a corresponding Steuerungsauf and be¬. At the end of the folding process, a comparatively large pressing force P, for example of the order of magnitude, must be used
2 von 500 N/mm Blechquerschnitt bei Blechdicken s von2 of 500 N / mm sheet cross section with sheet thickness s of
1 - 1,5 mm aufgebracht werden. Trotz dieser Kraft ist die Bildung einer Rippenöse 6 am Rippenkopf 7 nicht zu ver¬ meiden, deren Breite a in jedem Fall grösser ist als die zweifache Blechdicke. Auch der sich am Rippenfuss bildende Radius R ist grösser als der in der Vorrichtung vorgesehene Radius r.1 - 1.5 mm can be applied. Despite this force, the formation of a rib eyelet 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 in the device.
In Fig. 3 und 4 werden für die Bildung der geschlossenen Rippe ähnliche Spannvorrichtungen 1, 2 wie in Fig. 1 und 2 verwendet, jedoch kann nun hier der Einsatz des quer zum Bands-tück bewegten Faltschwertes entfallen, wodurch auch die verhältnismässig aufwendige Abstimmung der Ge¬ schwindigkeiten der Spannvorrichtungen 1, 2 und des Falt¬ schwertes nicht benötigt wird. Wesentlich ist hierbei, dass an der Stelle des sich bildenden Rippenkopfes 7 (Fig. 4) eine Kerbe 8 auf der der Aussenseite des Rippen¬ kopfes 7 entgegengesetzten Seite des Bandstückes 3 ange¬ ordnet wird. Durch die Anordnung der Kerbe 8 ist die Rich¬ tung der Auslenkung der Bandpartie festgelegt, weshalb auch kein Faltschwert eingesetzt werden uss.In FIGS. 3 and 4, similar clamping devices 1, 2 as in FIGS. 1 and 2 are used for the formation of the closed rib, but here the use of the folding sword moved transversely to the band piece can be omitted, which also means the relatively complex coordination of the Speeds of the tensioning devices 1, 2 and the folding sword are not required. It is important here that at the location of the rib head 7 that forms (Fig. 4) a notch 8 is arranged on the opposite side of the rib head 7 of the band piece 3. The arrangement of the notch 8 determines the direction of the deflection of the belt section, which is why no folding sword is used.
In Fig. 4 ist die am Schluss des Vorgangs geformte Rippe 5 ersichtlich. Diese weist praktisch keine Rippenöse mehr auf, son¬ dern die beiden Schenkel 9, 10 liegen bis zum Rippenkopf 7 spielfrei aufeinander.4 shows the rib 5 formed at the end of the process. This practically no longer has a rib eyelet, but the two legs 9, 10 lie on one another without play up to the rib head 7.
Im Gegensatz zu dem in Fig. 1 und 2 beschriebenen Falt¬ vorgang sind beim Faltvorgang nach Fig. 3 und 4 kleinereIn contrast to the folding process described in FIGS. 1 and 2, the folding process according to FIGS. 3 and 4 are smaller
Faltkräfte Fk. erforderlich und ebenso kann die am Ende des Faltvorgangs aufzuwendende Presskraft P, erheblich, z.B. um etwa 40%, reduziert werden. Wegen des Fehlens einer Rippenöse ist die Rippenbreite a, über die gesam¬ te Rippenhöhe gleich und ist etwa gleich der doppelten Bandstärke s, während für die Formung der Rippe 5 nach Fig. 1 und 2 die Rippenbreite a am Rippenkopf 7 mehr als das Doppelte der Bandstärke s beträgt.Folding forces Fk. required and likewise the pressing force P to be used at the end of the folding process can be considerable, e.g. by about 40%. Due to the lack of a rib eyelet, the rib width a is the same over the entire rib height and is approximately equal to twice the band thickness s, while for the formation of the rib 5 according to FIGS. 1 and 2, the rib width a on the rib head 7 is more than twice that Band strength s is.
Durch das Anbringen der Kerbe 8 wird zudem erreicht, dass der Radius R am Rippenfuss ebenfalls etwa gleich ist wie der Radius r an den Spannvorrichtungen 1, 2.By making the notch 8, it is also achieved that the radius R on the rib base is also approximately the same as the radius r on the clamping devices 1, 2.
Es ist noch zu bemerken, dass durch Ausbildung der Form und der Tiefe der Kerbe 8 das Auslenkverhalten der Band¬ partie, die Faltkraft F. und die Presskraft P. in hohem Masse beeinflusst werden können.It should also be noted that by designing the shape and depth of the notch 8, the deflection behavior of the band part, the folding force F. and the pressing force P. can be influenced to a large extent.
In Fig. 5 und 6 ist eine weitere Möglichkeit zur Bildung einer Rippe dargestellt. Der Unterschied gegenüber der Ausführungen nach Fig. 3 und 4 besteht darin, dass ausser der Kerbe 8 im Bereich des Rippenkopfes 7 zwei weitere Kerben 11, 12 im Bereich des Rippenfusses, jedoch auf der entgegengesetzten Seite der Kerbe 8 angeformt werden. Auch in diesem Fall ist ein Faltschwert nicht mehr erfor¬ derlich. Durch die Anordnung der Kerben 11, 12 wird die Faltkraft noch kleiner, als wenn nur die Kerbe 8 vorge¬ sehen wird. Die Presskraft P, wird dagegen nicht wesent¬ lich kleiner als in Fig. 3 und 4 und kann demnach eben¬ falls etwa 40% kleiner sein als bei der Ausführung nach Fig. 1 und 2.5 and 6 show a further possibility of forming a rib. The difference from that 3 and 4 consists in 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, on the other hand, 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.
Durch die Anordnung der Kerben 11, 12 erreicht man, dass am Rippenfuss ein beinahe scharfkantiger Uebergang ent¬ steht, d.h. der Radius R ist wesentlich kleiner als der an den Spannvorrichtungen 1, 2 vorgesehene Radius r.The arrangement of the notches 11, 12 means that an almost sharp-edged transition arises at the base of the rib, i.e. the radius R is substantially smaller than the radius r provided on the clamping devices 1, 2.
Das Auslenkverhalten, die Faltkraft F,k und die Press- kraft P, können durch die Form und die Tiefe der Kerben 11, 12 in erheblichem Umfang beeinflusst werden.The deflection behavior, the folding force F, k and the pressing force P can be influenced to a considerable extent by the shape and the depth of the notches 11, 12.
In den Figuren 3 bis 6 sind die Spannvorrichtungen 1, 2 so ausgebildet, dass die Bandpartie 4 zwischen den Spann¬ vorrichtungen 1, 2 und das Bandstück 3 in den Spannvorrich¬ tungen 1, 2 im wesentlichen eine Gerade bilden. Werden die Spannflächen leicht geneigt, derart, dass dadurch das Bandstück 3 eine flache dachförmige Form annimmt, wird die Auslenkseite für die Bildung der Rippen 5 zusätzlich definiert.In FIGS. 3 to 6, 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.
Durch die beschriebene Herstellung der geschlossenen Rippen 5 nach Fig. 3 bis 6 wird erreicht, dass durch die verhältnismässig einfache Massnahme des Anbringens von Kerben 8, 11, 12 der HerStellvorgang vereinfacht, die aufzubringenden Kräfte verringert und Rippenösen amThe described production of the closed ribs 5 according to FIGS. 3 to 6 ensures that the manufacturing process is simplified by the relatively simple measure of making notches 8, 11, 12, the forces to be applied are reduced and rib eyelets on
Figure imgf000008_0001
Rippenkopf praktisch vermieden werden können. Daraus resultieren erhebliche Vorteile bezüglich der Kosten für die einzusetzenden Maschinen und bezüglich der Qualität der Rippen bezüglich ihres Korrosionsverhaltens und ihrer äusseren Form..
Figure imgf000008_0001
Rib head can be practically avoided. This results in considerable advantages in terms of the costs for the machines to be used and in terms of the quality of the ribs in terms of their corrosion behavior and their external shape.
CMPI CMPI

Claims

Patentansprüche Claims
1. Verfahren zum Herstellen von mit geschlossenen Rippen1. Method of making with ribs closed
(5) versehenen Körpern aus Bandblech, bei dem jede Rippe (5) durch Falten eines Bandstückes (3) bestimm¬ ter Länge geformt wird, dadurch gekennzeichnet, dass vor dem Formen der Rippen (5) an mindestens einer der an den Enden der Rippe schenke! (9, 10) vorgesehenen Biegestellen zum Formen der Rippen (5) eine in der Längsrichtung der Rippen verlaufende Kerbung (8, 11, 12) der Blechoberfläche durchgeführt wird.(5) provided bodies from sheet metal, in which each rib (5) is formed by folding a piece of tape (3) of certain length, characterized in that before the ribs (5) are formed on at least one of the ends of the rib Donate! (9, 10) provided bending points for forming the ribs (5) a notch (8, 11, 12) of the sheet metal surface running in the longitudinal direction of the ribs is carried out.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Kerbung (8) an der. an dem Rippenkopf (7) vor¬ gesehenen Biegestelle vorgenommen wird.2. The method according to claim 1, characterized in that the notch (8) on the. provided at the rib head (7) provided bending point.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeich¬ net, dass die Kerbung (11, 12) an den an dem Rippen- fuss vorgesehenen Biegestellen vorgenommen wird.3. The method according to claim 1 or 2, characterized gekennzeich¬ net that the notch (11, 12) is made at the bending points provided on the fin base.
4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass vor dem Formen der Rippen (5) die Rippenschenkel (9, 10) dachförmig geneigt werden, z.B. beim Einspan¬ nen des Bandstückes (3) in zum Durchführen des Falt¬ gangs verwendete Spannvorrichtungen (1, 2) .4. The method according to claim 1, characterized in that before the ribs (5) are formed, the rib legs (9, 10) are inclined in a roof shape, e.g. when clamping the piece of tape (3) in tensioning devices (1, 2) used to carry out the folding aisle.
5. Rippe, hergestellt nach dem Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass sie über der gesamten Rip- penhδhe anliegende Schenkel (9, 10) aufweist und der Rippenkopf (7) ohne Rippenöse (6) ausgebildet ist.5. Rib, produced by the method according to claim 1, characterized in that it has abutting legs (9, 10) over the entire rib height and the rib head (7) is designed without a rib eyelet (6).
OMPI OMPI
PCT/CH1983/000049 1982-04-30 1983-04-21 Method for making closed grooves and body obtained thereby WO1983003784A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT83901184T ATE18639T1 (en) 1982-04-30 1983-04-21 PROCESS FOR MAKING CLOSED-RIBED BODY.
DE8383901184T DE3362582D1 (en) 1982-04-30 1983-04-21 Method for making closed grooves

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2666/82-6 1982-04-30
CH266682A CH655259A5 (en) 1982-04-30 1982-04-30 Method for producing with closed ribs provided by bodies and said method rib.

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EP (1) EP0107674B1 (en)
JP (1) JPS59500658A (en)
CH (1) CH655259A5 (en)
CS (1) CS244932B2 (en)
DE (1) DE3362582D1 (en)
WO (1) WO1983003784A1 (en)

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WO1997018910A1 (en) * 1995-11-23 1997-05-29 Aktiebolaget Electrolux Method and device to provide a sheet metal joint
DE102007004993A1 (en) * 2007-02-01 2008-08-07 Modine Manufacturing Co., Racine Production process for flat tubes and roller mill

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Publication number Priority date Publication date Assignee Title
EP3419798B1 (en) * 2016-02-23 2020-03-25 Koninklijke Philips N.V. Method of folding metal blank made of high-strenght material without cracks

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US3615964A (en) * 1968-09-20 1971-10-26 Ind Insulations Inc Method of forming creased fiber glass blanket
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DE1452768A1 (en) * 1963-11-02 1969-06-12 Wiesbaden Gmbh Maschf Device for the production of the sheet metal jacket of wave tanks for transformers
US3368692A (en) * 1964-01-20 1968-02-13 Coniker Entpr Inc Pleated pocket forming method
CH463940A (en) * 1965-09-21 1968-10-15 Luwa Ag Method and device for the manufacture of filter inserts
FR1544252A (en) * 1966-10-24 1968-10-31 Tetra Pak Ab A method of processing a sheet packaging material provided with transverse fold lines
US3615964A (en) * 1968-09-20 1971-10-26 Ind Insulations Inc Method of forming creased fiber glass blanket
WO1982003574A1 (en) * 1981-04-13 1982-10-28 Stroemberg Jan Method of effecting bending

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997018910A1 (en) * 1995-11-23 1997-05-29 Aktiebolaget Electrolux Method and device to provide a sheet metal joint
DE102007004993A1 (en) * 2007-02-01 2008-08-07 Modine Manufacturing Co., Racine Production process for flat tubes and roller mill

Also Published As

Publication number Publication date
JPS59500658A (en) 1984-04-19
EP0107674A1 (en) 1984-05-09
DE3362582D1 (en) 1986-04-24
CS244932B2 (en) 1986-08-14
EP0107674B1 (en) 1986-03-19
CH655259A5 (en) 1986-04-15
CS305683A2 (en) 1985-09-17

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