EP0718056A1 - Seam connection for plate flanges - Google Patents
Seam connection for plate flanges Download PDFInfo
- 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- Withdrawn
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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
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
- B21D51/30—Folding 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
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
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
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.
- 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
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
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
Claims (2)
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 |
Family
ID=6917830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95119525A Withdrawn EP0718056A1 (en) | 1994-12-23 | 1995-12-12 | Seam connection for plate flanges |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0718056A1 (en) |
DE (1) | DE9420601U1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007042812B4 (en) * | 2006-11-10 | 2015-03-26 | Tenneco Gmbh | shell case |
Citations (5)
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 |
-
1994
- 1994-12-23 DE DE9420601U patent/DE9420601U1/en not_active Expired - Lifetime
-
1995
- 1995-12-12 EP EP95119525A patent/EP0718056A1/en not_active Withdrawn
Patent Citations (5)
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 |
Also Published As
Publication number | Publication date |
---|---|
DE9420601U1 (en) | 1995-02-16 |
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