Founded in 2011, TTM Group China has rich experience in manufacturing and exporting auto stamping dies, welding fixtures and checking fixtures. We are an approved supplier to majority of OEM’s. Our Tier 1 customers are based worldwide.In this article we want to share two laser welding processes of automobile body.

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As an advanced welding technology of optomechanical integration, laser welding technology has the advantages of high energy density, fast welding speed, small welding stress and deformation, and good flexibility compared with traditional automobile body welding technology.

Therefore, laser welding technology is an important technical means to achieve high-quality development of the automobile industry. This article introduces the application of laser welding in automobile body welding in detail!

The main laser welding processes currently used in automobile body welding include laser deep penetration welding and laser filler wire welding.

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1, Automobile body laser deep penetration welding process

Laser deep penetration welding means that when the laser power density reaches a certain level, the surface of the material is vaporized to form a keyhole. The metal vapor pressure in the hole and the static pressure and surface tension of the surrounding liquid reach a dynamic equilibrium. The laser can be irradiated to the hole through the keyhole. At the bottom, a continuous weld seam is formed with the movement of the laser beam. Laser deep penetration welding does not need to add auxiliary flux or filler, and completely utilizes the material of the workpiece itself to weld as a whole.

The weld seam obtained by laser deep penetration welding is generally smooth and straight, with small deformation, which is conducive to improving the manufacturing accuracy of the automobile body; the high tensile strength of the weld seam ensures the welding quality of the automobile body; the welding speed is fast, which is conducive to improving the welding quality. Productivity.

In automobile body welding, the laser deep penetration welding process can meet the welding requirements of body assembly welding and tailor welding. In the body assembly welding, it is mainly used for the welding of the body top cover side wall, car door and other areas. In the body tailor welding, it is mainly used for the welding of steel plates with different strengths, different thicknesses and different coatings.

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2. Automobile body laser wire filler welding process

Laser wire filling welding is a process method that pre-fills a specific welding wire in the weld seam or feeds the welding wire synchronously during the laser welding process to form a welded joint. It is equivalent to inputting approximately homogeneous welding wire material into the weld pool during laser deep penetration welding. Compared with laser deep penetration welding, laser wire filler welding has two advantages when applied to automobile body welding. The problem of excessive requirements, the second is that the tissue distribution of the weld area can be improved by using welding wires with different composition contents, and then the weld performance can be adjusted.

These are all we want to share today,thanks your reading.

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