Cleaning and welding integration device for black volume endless rolling

Abstract

The invention belongs to the technical field of hybrid welding and discloses a cleaning and welding integration device for black volume endless rolling. The cleaning and welding integration device comprises a hybrid welding module and a laser cleaning module. Hybrid heat source is formed by the hybrid welding module through laser and electric arc, and the hybrid heat source and the hybrid weldingmould cooperate on the surface of black coil steel to be welded to trigger the molten pool, meanwhile, the laser attracts the electric arc so that drift of arc root of the electric arc can be restrained; the laser cleaning module is used for partial cleaning of the upper and lower surfaces before and after welding of the joint of the black coil steel ; the hybrid welding module and the laser cleaning module are both arranged on the same support, and a integrative structure of cleaning-welding-cleaning is formed, therefore, that on-line cleaning and welding are conducted simultaneous is achieved. The invention further discloses a welding method of the cleaning and welding integration device for black volume endless rolling. According to the cleaning and welding integration device for the black volume endless rolling, metallurgical defects of air holes, inclusion and incomplete fusion in the welding process are prevented efficiently, seam quality and smooth after welding in the hybrid welding process are guaranteed, efficiency and stability of endless rolling are improved, and risk of strip breakage is reduced.

Description

technical field [0001] The invention belongs to the technical field of composite welding, and more specifically relates to an integrated cleaning and welding device used in endless rolling of black coils. Background technique [0002] In the industry, semi-finished steel coils without pickling, descaling and other follow-up processes are called black coils, otherwise they are white coils. Endless rolling is to weld the first and last two black coils on the middle roller table, and continuously feed them into the rolling mill. , so as to realize a technology of continuous rolling, since the rolling tension in the whole process remains unchanged, the production rhythm is greatly improved, and it is widely used in the production of steel products. [0003] Compared with white coils, black coils have thicker oxide scales on the upper and lower surfaces. On the one hand, the oxide scales with different thicknesses greatly affect the stability of the black coil welding process. On...

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Problems solved by technology

However, further studies have shown that the above-mentioned prior art still has the following deficiencies or defects: First, although laser cleaning is performed on the surface of the workpiece to be processed, it is for the cleaning of finished parts and does not involve welding and post-weld cleaning processes, and The entire equipment is equipped with cameras and infrared detectors, which makes the system complex, high equipment cost, and slow response time, and is not suitable for harsh on-site conditions such as steel enterprises; secondly, in the prior art, the entire black coil strip Cleaning is carried out to obtain white coil strip steel. Partial cleaning of black coils cannot be realized. Because the oxide scale on the surface of black coils is thick and strongly combined with the matrix, the acid in pickling is not easy to penetrate, so pickling cannot be completely removed. The iron oxide scale on the surface of the black roll needs to be used in conjunction with mechanical phosphorus breaking equipment to remove the iron oxide scale, which makes the pickling equipment complicated and costly. In addition, the waste liquid generated after pickling is also likely to cause pollution to the environment, etc. question

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