Laser butt welding device for automobile parts

Abstract

The invention relates to the field of laser tailored welding, in particular to a laser butt welding device for automobile parts, which comprises roller tables, at least one clamping element, a laser welding head, upper supports, cylinders and gas sacs. The roller tables are used for conveying and placing steel plates, the clamping elements are mounted on the roller tables and used for fixing and placing the steel plates on the roller tables, the laser welding head is welding the two steel plates at a welded position of the two steel plates, the upper supports and the cylinders are positioned above the clamping elements, the clamping elements can be clamped so as to leave away from the steel plates when the cylinders move, each gas sac is positioned between the corresponding upper support and the corresponding clamping element, and the clamping elements rotate around pivots to press the steel plates after the gas sacs are filled with gas and expanded. The laser butt welding device has the advantages that the laser butt welding device can be easily integrated into a production line to realize butt welding of steel plates in a large batch, the steel plates can be fixed by the aid of dowels capable of vertically moving or the clamping elements, tailored welding seams are reduced, problems that a system runs unreliably and is easy to damage due to a single fixing mode by the aid of clamping elements in the prior art are solved, and welding quality is improved.

Description

[0001] technical field [0002] The invention relates to the field of laser tailor welding, in particular to a laser butt welding device for automobile parts. [0003] Background technique [0004] Tailored laser welding technology is widely used in the field of automobile manufacturing, especially in the design and manufacture of car bodies. Laser tailor welded blank is to weld two or more steel plates of different thickness or different materials into one steel plate by laser butt welding, and then carry out overall stamping and forming. In order to ensure the welding quality, it is necessary to fix each steel plate to be welded with a clamp during the welding process. Tailored laser welding has very strict requirements on the assembly gap between the two plates to be welded, and thermal stress is generated during the tailoring laser welding process, which makes the tailor welding gap bigger and bigger, which affects the welding quality. [0005] Chinese patent CN1346304A...

AI Technical Summary

Problems solved by technology

Because laser tailor welding has very strict requirements on the assembly gap between the two plates to be welded, and the thermal stress generated in the process of laser tailor welding makes the tailor welding gap bigger and bigger, which affects the welding quality

[0005] Chinese patent CN1346304A discloses a laser welding system. In order to overcome the problem of unstable assembly gap between two plates to be welded, the system adopts clamping elements, upper brackets, cylinders, air bags and other components to fix the upper surface of the steel plate as much as possible. Reduce the joint gap, but the mechanism of action is relatively complicated

Since the clamping element is in the shape of a clip, the force-bearing area of ​​the part in direct contact with the steel plate is small, so the clamping element is easily damaged, and the air bag is also easily damaged, which affects the reliability of the gap reduction device

When the gap reduction device fails, it cannot be monitored in real time, which may cause waste of raw material steel plates

In addition, the system uses a fixed welding frame to place steel plates, which is not conducive to integration into the production line, and is not conducive to the butt welding of large-scale steel plates

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