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Laser welding method

A technology of laser welding and structural layers, which is applied in the direction of laser welding equipment, welding equipment, welding/welding/cutting items, etc., and can solve the problems of increasing costs

Inactive Publication Date: 2006-10-11
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The proposed measures for producing the required gap generally have the following disadvantages: for this purpose, the material to be welded requires an additional shaping or a prior corresponding structural design, so that in practical application Significantly increase the cost
[0009] The proven disadvantage of this method is the additional expense due to the use of adhesive tape to bond the cover plate to the base plate
Furthermore, the method is only suitable for welded connections in the edge region of two sheets

Method used

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Embodiment Construction

[0026] figure 1 Represents a side view of an apparatus for implementing the laser welding method proposed by the present invention. The figure shows a clamping element 1 , by means of which two pieces of material 2 , 3 obtained from coated metal sheets to be welded together are held in a predetermined position. A structural layer 4 is arranged between the materials 2 , 3 , which delimits a gap 5 . Welding emissions released during heating of the materials 2, 3 can escape through the aforementioned gap 5, so that damage to the weld due to such emissions can be avoided.

[0027] The structure layer 4 used for this will refer to figure 2 To elaborate, the figure shows a top view of the different embossings of the structural layer 4 . Here, the structural layer 4 is formed by a foil 7 provided with recesses 6 and protrusions 8, the purpose of which is to make the figure 1 The gap 5 shown in obtains the required boundary. Foil 7 is for this purpose adhesively applied to figu...

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PUM

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Abstract

At least one of the two materials (2,3) has a coating. A gap is provided between the materials, through which welding emissions released by the heating can escape. The gap is created by depositing a structure (4). This may be achieved by depositing a flexible layer with multiple recesses. The structure may be applied as a film or using printing techniques.

Description

technical field [0001] The invention relates to a laser welding method for joining two materials, wherein at least one of the two materials has a coating, and a gap is left between the two materials, the weld is released when heated Projectiles can escape through this gap. Background technique [0002] Such a laser welding method is the subject of EP 0157913 B1. By means of a movable separator provided for this purpose, a gap can be defined between the two pieces of material according to a specific embodiment, through which volatile components of the coating, such as oil or lacquer, can escape. . [0003] DE 3933408 A1 also describes a weld seam in which two metal sheets are kept at a corresponding distance by means of pressed-in pins. According to a laser welding method proposed in EP 1005944 A2, a gap is also provided for certain zinc-coated steel sheets, which is also proposed in a similar manner in a welding method according to EP 0178394 A2, the purpose of which is t...

Claims

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Application Information

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IPC IPC(8): B23K26/20B23K26/16B23K26/244B23K26/322
CPCB23K26/16B23K26/244B23K2101/34B23K2103/08
Inventor R·波伦斯基C·埃尔斯纳D·佩特T·弗兰茨J·米勒－罗盖特
Owner VOLKSWAGEN AG