Patent DE-102009026037-A1 (DE)
Title: Connecting three walls, which are produced in the area of the connection made of metal, over welding joint, comprises providing first edge region of first wall, and producing second edge region of second wall with flange and elongation
Inventor: KURTH ROBERT
IPC: B21D51/18
Filed: 2009-06-25
Abstract: The method for connecting three walls, which are produced in the area of the connection made of metal, over a welding joint, comprises providing a first edge region (11) of a first wall, producing a second edge region (21) of a second wall (20) with a first flange (23) and a first elongation at a first edge, where the first flange is produced by separating the first elongation and double fold, and producing a third edge region (31) of a third wall with a second flange and a second elongation at a first edge, where the second flange is produced by separating second elongation and double fold. The method for connecting three walls, which are produced in the area of the connection made of metal, over a welding joint, comprises providing a first edge region (11) of a first wall, producing a second edge region (21) of a second wall (20) with a first flange (23) and a first elongation at a first edge, where the first flange is produced by separating the first elongation and double fold, producing a third edge region (31) of a third wall with a second flange and a second elongation at a first edge, where the second flange is produced by separating the second elongation and double fold, joining the first flange with the second flange and the first edge with the first wall, so that the both elongations coincide, expanding a first gap between the second wall and the third wall from the first wall along the connection between the first elongation and the second elongation and the first flange and the second flange, expanding a second gap between the first edges of the second wall and the third wall on one side and the first wall on the other side, and welding the first gap under the formation of a first welding joint and welding the second gap under the formation of a second welding joint at the side of the second and third walls turned away from a first bulge. The first edge region is produced with the first bulge in the area of a first rip, recess, notch or access, where the both elongations coincide in the area of the rip, recess, notch or access and/or the first edges coincide with the first wall in the area of the first rip. A third elongation is provided at a second edge of the second edge region running parallel to the first edge of the second edge region, and at a fourth wall in the area of a second rip, recess, notch or access. A fourth elongation is provided at a second edge of the third edge region running parallel to the first edge of the third edge region, and at the fourth wall in the area of the second rip, recess, notch or access. The third elongation and the fourth elongation are joined during joining the first flange and the second flange. The fourth wall areawisely runs parallel to the first wall. The first gap extends from the first wall to the fourth wall between the third and fourth elongations. A third gap extends between the second edges of the second and third wall and the fourth wall. The first gap is welded together over its complete length during the formation of the first welding joint and the third gap is welded together over its complete length during the formation of a third welding joint. The second edge region and the third edge region are formed to each other in a mirror-symmetrical manner, the first edge region and the fourth edge region are formed to each other in a mirror-symmetrical manner, the first and second elongations are equally dimensioned, the third and fourth elongations are equally dimensioned, the first and fourth elongations are produced in a mirror-symmetrical manner, and/or the second and fourth elongations are produced in a mirror-symmetrical manner.