Tailored laser welding device and its control method based on rolling while welding

Abstract

The present invention proposes a tailor-made laser welding device based on rolling with welding, which includes a welding work platform fixed on the ground, a welding mobile platform and a centering pressure device, wherein the centering pressure device and the welding work platform are along the The conveying direction of the plate is arranged on the ground in turn, and the welding mobile platform is across the welding work platform; a laser head, a pre-welding pressure device and a post-welding pressure device are connected on the welding mobile platform, and the pre-welding pressure device Both the device and the post-welding pressure device can be in contact with the plate to be welded on the welding work platform, and the focus of the laser beam of the laser head is on the surface of the plate to be welded between the pre-weld pressure device and the post-weld pressure device; The control system controls the welding work platform, the welding mobile platform, the centering pressure device, the laser head, the pre-weld pressure device and the post-weld pressure device through the data line connection. The device has a simple and reliable structure, is convenient to operate, and can improve the welding effect of dissimilar metal thin plates.

Description

technical field [0001] The invention relates to the field of material processing engineering, in particular to a laser tailor welding device based on welding rolling and its control method. Background technique [0002] The connection of aluminum / steel dissimilar metals is widely used in the industrial field, especially in the automotive industry. The reliable connection of the two can effectively reduce the weight of the car body, save energy consumption, and reduce exhaust emissions. The most critical point affecting the performance of aluminum / steel dissimilar metal welded joints is the control of the intermetallic compound layer at the joint. An excessively thick brittle intermetallic compound layer will seriously affect the performance of the joint. Therefore, inhibiting the formation and growth of the intermetallic compound layer is an effective way to improve the performance of the joint. Excessive heat input will promote the formation of thick intermetallic compound...

AI Technical Summary

Problems solved by technology

[0005] For example, the welding rolling device disclosed in the patent with publication number CN 204771174 U is huge, and the rolling wheel is easy to block the laser path, or the rolling position deviates too far from the laser action position, and the purpose of welding can not be achieved.

The welding hammering device disclosed in the patent with the publication number CN 201728471U uses mechanical force to directly contact the surface of the test piece. The pressure applied is not continuous, and it is difficult to ensure the uniformity of the rolling effect. Quantify

The impact rolling device with welding disclosed in Chinese patent ZL03132581.5 is a new technology for controlling welding stress and deformation. Although this method makes up for some shortcomings of rolling with welding and impact device with welding, it is still applied intermittently. Pressure, the guarantee of its impact effect is based on reducing the impact area, and the size of the impact force is difficult to quantify

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