EP0718056A1 - Seam connection for plate flanges - Google Patents

Seam connection for plate flanges Download PDF

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Publication number
EP0718056A1
EP0718056A1 EP95119525A EP95119525A EP0718056A1 EP 0718056 A1 EP0718056 A1 EP 0718056A1 EP 95119525 A EP95119525 A EP 95119525A EP 95119525 A EP95119525 A EP 95119525A EP 0718056 A1 EP0718056 A1 EP 0718056A1
Authority
EP
European Patent Office
Prior art keywords
flange
edge
connection
narrower
wider
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.)
Withdrawn
Application number
EP95119525A
Other languages
German (de)
French (fr)
Inventor
Karl Hartkorn
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.)
Tenneco GmbH
Original Assignee
Heinrich Gillet 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 Heinrich Gillet GmbH filed Critical Heinrich Gillet GmbH
Publication of EP0718056A1 publication Critical patent/EP0718056A1/en
Withdrawn legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00Making hollow objects
    • B21D51/16Making hollow objects characterised by the use of the objects
    • B21D51/26Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/30Folding the circumferential seam

Definitions

  • the invention relates to rebated connections on circumferential, superimposed sheet metal flanges, in particular for sheet metal housings composed of deep-drawn shells, according to the preamble of claim 1.
  • folded connections are also known and customary for connecting metal sheets. While the first three are always positive and non-positive connections, folded connections can also be made without a positive connection.
  • the sheets which are, for example, the flanges of housings composed of deep-drawn shells, are placed on top of one another in such a way that one sheet edge protrudes over the other.
  • the protruding sheet edge is then bent over the shorter edge area. With this connection, the two sheet metal parts can move against each other.
  • L-fold is primarily known as a fold connection with a frictional connection.
  • the two sheets lie on top of one another with flange edges of different widths.
  • the end of the narrower flange edge is bent vertically out of the sheet metal plane.
  • the end of the wider edge area is then bent around the narrower edge area. This connection can absorb forces in two mutually perpendicular planes.
  • the present invention is based on the object of specifying a rebated connection which readily enables an always exact dimensional accuracy and an increased tightness of the finished sheet metal connection.
  • This construction has the advantage that the two sheets and in particular the sheet with the wider flange edge, which is bent around the narrower flange edge bent perpendicularly from the flange or sheet plane, are now secured against displacements in the sheet or flange plane.
  • the finished housing therefore always has the same shapes and dimensions. It was also found that the finished flange connection is not only more stable, but also considerably more gas-tight than with the conventional L-fold.
  • the figures each show a section of a cross section through the flange area of a sheet metal housing made from two deep-drawn shells 1, 1 ', 2, 2'. Both shells 1, 1 ', 2, 2' each have a flange edge 5, 6 pointing outwards in the flange plane 7, the narrower flange edge 5 of the upper shell 1 being bent perpendicularly against the flange plane 7 and the wider flange edge 6 around the upstanding end the narrower flange edge 5 is bent around, as is known from the L-fold.
  • a step 3 is formed in both flanges 5, 6, which is directed in the opposite direction to the raised, narrower flange edge 5. This creates a longitudinal groove 4. This takes up the end of the wider flange edge 6, whereby the fold connection is additionally mechanically protected.
  • the figures also show a section of a lower tool or die 8 used in the manufacture of the fold connection.
  • This has a raised shoulder 9 in the area of step 3. Thanks to shoulder 9 and step 3, the wider flange edge 6 of the lower housing shell 2 is against displacement in the flange plane 7 100 percent secured so that the two half-shells 1, 1, 2, 2 'are exactly aligned in the finished sheet metal housing.
  • the seam connection overall increased repeatability and gas tightness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Packages (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

The joint is between peripheral flanges, particularly on deep-drawn dish-sections assembled into a housing. The wider flange end (6) is bent around that (5) of the narrower one, which is bent at right angles to the plane (7) of the flange. The step (3) formed in each flange faces the opposite way to the edge of the narrower flange. The end of the wider flange edge (6) can fit in the groove (4) formed by the step.

Description

Die Erfindung betrifft Falzverbindungen an umlaufenden, aufeinanderliegenden Blechflanschen, insbesondere für aus tiefgezogenen Schalen zusammengesetzten Blechgehäusen, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to rebated connections on circumferential, superimposed sheet metal flanges, in particular for sheet metal housings composed of deep-drawn shells, according to the preamble of claim 1.

Zur Verbindung von Blechen sind neben Schweiß-, Schraub- und Nietverbindungen auch Falzverbindungen bekannt und gebräuchlich. Während die drei erstgenannten stets form- und kraftschlüssige Verbindungen sind, können Falzverbindungen auch ohne Kraftschluß ausgeführt sein.In addition to welded, screwed and riveted connections, folded connections are also known and customary for connecting metal sheets. While the first three are always positive and non-positive connections, folded connections can also be made without a positive connection.

Bei herkömmlichen Falzverbindungen ohne Kraftschluß werden die Bleche, bei denen es sich beispielsweise um die Flansche von aus tiefgezogenen Schalen zusammengesetzten Gehäusen handelt, so aufeinandergelegt, daß zunächst ein Blechrand über den anderen übersteht. Der überstehende Blechrand wird anschließend über den kürzeren Randbereich gebogen. Bei dieser Verbindung können sich die beiden Blechteile gegeneinander verschieben.In conventional rebated connections without frictional connection, the sheets, which are, for example, the flanges of housings composed of deep-drawn shells, are placed on top of one another in such a way that one sheet edge protrudes over the other. The protruding sheet edge is then bent over the shorter edge area. With this connection, the two sheet metal parts can move against each other.

Als Falzverbindung mit Kraftschluß ist vor allem der sogenannte L-Falz bekannt. Auch hier liegen die beiden Bleche mit unterschiedlich breiten Flanschrändern aufeinander. Zunächst wird das Ende des schmäleren Flanschrandes senkrecht aus der Blechebene abgebogen. Anschließend wird das Ende des breiteren Randbereiches um den schmäleren Randbereich herumgebogen. Diese Verbindung kann Kräfte in zwei zueinander senkrecht stehenden Ebenen aufnehmen.The so-called L-fold is primarily known as a fold connection with a frictional connection. Here, too, the two sheets lie on top of one another with flange edges of different widths. First, the end of the narrower flange edge is bent vertically out of the sheet metal plane. The end of the wider edge area is then bent around the narrower edge area. This connection can absorb forces in two mutually perpendicular planes.

Die praktische Erfahrung zeigt allerdings, daß der L-Falz einige Nachteile besitzt. Diese sind dadurch bedingt, daß die Randbereiche der beiden Bleche, und zwar insbesondere dann, wenn es sich um die Flansche von Gehäuseschalen handelt, die nicht mit Hilfe eines Innenwerkzeugs festgehalten werden können, sich in der Blech- bzw. Flanschebene gegeneinander verschieben können, und zwar unter der Wirkung der die Falzverbindung herstellenden Werkzeuge, bis die Falzverbindung fertiggestellt ist. Die Folge ist, daß die Form der fertigen Gehäuse unerwünscht stark variiert, daß die Flanschverbindung nicht immer ausreichend dicht wird usw.Practical experience shows, however, that the L-fold has some disadvantages. These are due to the fact that the edge areas of the two sheets, especially when it is the flanges of housing shells that can not be held with the help of an internal tool, can move against each other in the sheet or flange plane, under the effect of the Tools that create the fold connection until the fold connection is completed. The result is that the shape of the finished housing varies undesirably, that the flange connection is not always sufficiently tight, etc.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Falzverbindung anzugeben, die ohne weiteres eine stets exakte Maßgenauigkeit sowie eine erhöhte Dichtigkeit der fertigen Blechverbindung ermöglicht.The present invention is based on the object of specifying a rebated connection which readily enables an always exact dimensional accuracy and an increased tightness of the finished sheet metal connection.

Diese Aufgabe wird gelöst durch eine Falzverbindung mit den Merkmalen des Anspruchs 1.This object is achieved by a fold connection with the features of claim 1.

Diese Konstruktion hat den Vorteil, daß die beiden Bleche und insbesondere das Blech mit der breiteren Flanschkante, die um die aus der Flansch- bzw. Blechebene senkrecht abgebogene schmälere Flanschkante herumgebogen wird, jetzt gegen Verschiebungen in der Blech- bzw. Flanschebene gesichert sind. Das fertige Gehäuse besitzt daher immer gleiche Formen und Abmessungen. Außerdem konnte festgestellt werden, daß die fertige Flanschverbindung nicht nur stabiler, sondern auch erheblich gasdichter ist als beim herkömmlichen L-Falz.This construction has the advantage that the two sheets and in particular the sheet with the wider flange edge, which is bent around the narrower flange edge bent perpendicularly from the flange or sheet plane, are now secured against displacements in the sheet or flange plane. The finished housing therefore always has the same shapes and dimensions. It was also found that the finished flange connection is not only more stable, but also considerably more gas-tight than with the conventional L-fold.

Des weiteren besteht die Möglichkeit, das Ende der breiteren Flanschkante in die durch die Stufe gebildete Längsnut zu legen, wo es gegen Aufbiegen zusätzlich gesichert ist.There is also the possibility of placing the end of the wider flange edge in the longitudinal groove formed by the step, where it is additionally secured against bending.

Anhand der Zeichnung soll die Erfindung in Form eines Ausführungsbeispiels näher erläutert werden. Es zeigen

Fig. 1
einen Querschnitt durch den Flanschbereich eines aus zwei Schalen hergestellten Gehäuses und
Fig. 2
einen Querschnitt analog Fig. 1, jedoch unter Verwendung von Doppelblechen.
Based on the drawing, the invention in the form of a Embodiment will be explained in more detail. Show it
Fig. 1
a cross section through the flange of a housing made of two shells and
Fig. 2
a cross section analogous to FIG. 1, but using double sheets.

Die Figuren zeigen ausschnittsweise jeweils einen Querschnitt durch den Flanschbereich eines aus zwei tiefgezogenen Schalen 1, 1', 2, 2' hergestellten Blechgehäuses. Beide Schalen 1, 1', 2, 2' besitzen je eine in der Flanschebene 7 nach außen weisende Flanschkante 5, 6, wobei die schmalere Flanschkante 5 der oberen Schale 1 gegen die Flanschebene 7 senkrecht abgebogen und die breitere Flanschkante 6 um das hochstehende Ende der schmaleren Flanschkante 5 herumgebogen ist, wie es vom L-Falz her bekannt ist.The figures each show a section of a cross section through the flange area of a sheet metal housing made from two deep-drawn shells 1, 1 ', 2, 2'. Both shells 1, 1 ', 2, 2' each have a flange edge 5, 6 pointing outwards in the flange plane 7, the narrower flange edge 5 of the upper shell 1 being bent perpendicularly against the flange plane 7 and the wider flange edge 6 around the upstanding end the narrower flange edge 5 is bent around, as is known from the L-fold.

Zwischen Gehäuse und Falzverbindung ist in beide Flansche 5, 6 eine Stufe 3 eingeformt, die entgegengesetzt zur hochgestellten schmaleren Flanschkante 5 gerichtet ist. Dadurch entsteht eine längslaufende Nut 4. Diese nimmt das Ende der breiteren Flanschkante 6 auf, wodurch die Falzverbindung zusätzlich mechanisch geschützt ist.Between the housing and the rebated connection, a step 3 is formed in both flanges 5, 6, which is directed in the opposite direction to the raised, narrower flange edge 5. This creates a longitudinal groove 4. This takes up the end of the wider flange edge 6, whereby the fold connection is additionally mechanically protected.

Die Figuren zeigen des weiteren ausschnittsweise ein bei der Herstellung der Falzverbindung verwendetes Unterwerkzeug oder Gesenk 8. Dieses besitzt im Bereich der Stufe 3 eine erhöhte Schulter 9. Dank Schulter 9 und Stufe 3 ist die breitere Flanschkante 6 der unteren Gehäuseschale 2 gegen Verschiebungen in der Flanschebene 7 hundertprozentig gesichert, so daß beim fertigen Blechgehäuse die beiden Halbschalen 1, 1, 2, 2' in jedem Fall exakt fluchten. Außerdem besitzt dank der mehrfachen Umlenkung und der besonderen Art der Herstellung der umlaufenden Nut 4 die Falzverbindung insgesamt eine erhöhte Wiederholgenauigkeit und Gasdichtigkeit.The figures also show a section of a lower tool or die 8 used in the manufacture of the fold connection. This has a raised shoulder 9 in the area of step 3. Thanks to shoulder 9 and step 3, the wider flange edge 6 of the lower housing shell 2 is against displacement in the flange plane 7 100 percent secured so that the two half-shells 1, 1, 2, 2 'are exactly aligned in the finished sheet metal housing. In addition, thanks to the multiple deflection and the Special type of production of the circumferential groove 4, the seam connection overall increased repeatability and gas tightness.

Claims (2)

Falzverbindung an umlaufenden, aufeinanderliegenden Blechflanschen, insbesondere für aus tiefgezogenen Schalen (1, 2; 1', 2') zusammengesetzten Blechgehäusen, wobei die eine, breitere Flanschkante (6) um die andere, schmälere, aus der Flanschebene (7) senkrecht abgewinkelte Flanschkante (5) herumgebogen ist, dadurch gekennzeichnet, daß in beide Flansche (5, 6) eine Stufe (3) eingeformt ist, die entgegengesetzt gerichtet ist zur schmaleren Flanschkante (5).Folded connection on circumferential sheet metal flanges lying one on top of the other, in particular for sheet metal housings composed of deep-drawn shells (1, 2; 1 ', 2'), one wider flange edge (6) around the other, narrower flange edge angled vertically from the flange plane (7) (5) is bent around, characterized in that a step (3) is formed in both flanges (5, 6), which is directed opposite to the narrower flange edge (5). Falzverbindung nach Anspruch 1, dadurch gekennzeichnet, daß das Ende der breiteren Flanschkante (6) in der durch die Stufe (3) gebildeten Nut (4) liegt.Folded connection according to claim 1, characterized in that the end of the wider flange edge (6) lies in the groove (4) formed by the step (3).
EP95119525A 1994-12-23 1995-12-12 Seam connection for plate flanges Withdrawn EP0718056A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9420601U DE9420601U1 (en) 1994-12-23 1994-12-23 Folded connection on sheet metal housings
DE9420601U 1994-12-23

Publications (1)

Publication Number Publication Date
EP0718056A1 true EP0718056A1 (en) 1996-06-26

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EP95119525A Withdrawn EP0718056A1 (en) 1994-12-23 1995-12-12 Seam connection for plate flanges

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DE (1) DE9420601U1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007042812B4 (en) * 2006-11-10 2015-03-26 Tenneco Gmbh shell case

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987740A (en) * 1975-03-28 1976-10-26 Merson Karol J W Portable seam locking device
GB1457561A (en) * 1973-01-31 1976-12-08 Nissan Motor Method of joining the edge portions of two sheets
EP0394531A1 (en) * 1989-04-27 1990-10-31 Leifeld GmbH & Co. Seaming machine
FR2682158A1 (en) * 1991-10-04 1993-04-09 Wimetal Sa An exhaust system silencer for a motor vehicle
DE9400796U1 (en) * 1994-01-20 1994-04-07 Heinrich Gillet Gmbh & Co Kg, 67480 Edenkoben Silencer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1457561A (en) * 1973-01-31 1976-12-08 Nissan Motor Method of joining the edge portions of two sheets
US3987740A (en) * 1975-03-28 1976-10-26 Merson Karol J W Portable seam locking device
EP0394531A1 (en) * 1989-04-27 1990-10-31 Leifeld GmbH & Co. Seaming machine
FR2682158A1 (en) * 1991-10-04 1993-04-09 Wimetal Sa An exhaust system silencer for a motor vehicle
DE9400796U1 (en) * 1994-01-20 1994-04-07 Heinrich Gillet Gmbh & Co Kg, 67480 Edenkoben Silencer

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Publication number Publication date
DE9420601U1 (en) 1995-02-16

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