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Method of assembly by discontinuous thermal welding along the join of a steel sheet with an aluminium sheet, with deposition of a clean material to form a sealed joint on the join

An assembly method, a technology of thermal welding, applied in welding equipment, superstructure sub-assemblies, welding/welding/cutting items, etc., which can solve problems such as danger, cracks in thermal connection welds, etc.

Active Publication Date: 2017-03-01
PEZHO SITROEN AUTOMOBILS SA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] However, in the context of the assembly between two elements for motor vehicles, one steel sheet metal and the other aluminum sheet metal, such as an aluminum roof and a steel cabin side, such Thermal connections are not possible due to the risk of cracks that may occur at the welds thus performed

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  • Method of assembly by discontinuous thermal welding along the join of a steel sheet with an aluminium sheet, with deposition of a clean material to form a sealed joint on the join
  • Method of assembly by discontinuous thermal welding along the join of a steel sheet with an aluminium sheet, with deposition of a clean material to form a sealed joint on the join
  • Method of assembly by discontinuous thermal welding along the join of a steel sheet with an aluminium sheet, with deposition of a clean material to form a sealed joint on the join

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Embodiment Construction

[0033] In the illustrated embodiment, a vehicle roof 1 made of aluminum is assembled on a vehicle cabin side 2 made of steel.

[0034] The canopy 1 is obtained from an aluminum sheet metal blank (thickness in the embodiment about 1.5 mm), preferably by stamping, so that each longitudinal edge 1 a is curved inwards, preferably with a radius of curvature R of about 4 mm. The cabin side 2 is likewise realized from a steel sheet metal part by stamping. When assembled, the curved edge 1 a is arranged against the face 2 a of the cabin side 2 .

[0035] The joint surface 3 provided between the edge 1a of the roof 1 and the face 2a of the side part 2 of the cabin is substantially V-shaped and due to the radius of curvature R of the roof edge 1a, in the illustrated embodiment the joint The depth of face 3 is approximately 7 mm.

[0036] According to the principles of the invention, the edge 1a of the roof 1 is rigidly fixed to the side face 2a of the cabin by a weld 4 obtained by the...

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Abstract

The invention describes a process for assembly of two sheet metal elements (1, 2), one of which is made of steel and the other of aluminium, comprising a thermal welding step of the two sheet metal elements using an filler material. A V-shaped joining face (3) is provided between the two sheet metal elements (1, 2), the two sheet metal elements (1, 2) are fastened by depositing a weld bead (4) in the base of the joining face (3) in a discontinuous manner along said joining face (3), and then a clean material for forming a sealed joint (5) is deposited along the joining face (3) over the entire length of said joining face (3).

Description

technical field [0001] The invention relates to a method of assembling sheet metal elements of different materials, in particular one of which is made of steel and the other of which is made of aluminium. Background technique [0002] In the automotive sector, more specifically in reducing energy consumption and thus CO 2 Within the context of emissions, it is desirable to lighten motor vehicles as much as possible. Therefore, from the perspective of lightening the structure, it can be expected to replace some steel members with lighter aluminum alloy elements. [0003] For assembling two components, one of which is made of steel and the other is based on aluminum, conventional mechanical assembly solutions (riveting, pressure riveting, screwing) are known and applicable. However, for rigid problems, it may be necessary to implement continuous connections between these elements. [0004] Fe-Al alloy metallurgy is extremely complex and all assembly by fusion between these ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/09B23K9/23B23K33/00B62D25/06B62D27/02
CPCB23K9/091B23K9/232B23K33/008B23K2101/006B23K2101/185B23K2103/20B62D25/06B62D27/023
Inventor 大卫·费纳罗马里克·勒诺
Owner PEZHO SITROEN AUTOMOBILS SA