Experimental device for laser welding that can realize magnetic field-assisted forming

Abstract

The present invention can realize the laser welding experimental device of magnetic field assisted forming, comprising: frame; sample placement table, sample placement table is arranged on the frame; test plate, test plate is arranged on the sample placement table; permanent magnet, permanent magnet is arranged On the top of the test board; iron core, the iron core is set under the test board, and the iron core is connected to the external power supply. Compared with the prior art, the present invention has the following beneficial effects: the penetration depth of aluminum alloy laser welding is larger, the sum of the gravity on the molten pool and the keyhole vapor reaction force of the molten pool will be greater than the surface tension at the bottom, and the It is easier to leak under the condition of no liner and form weld flash. The purpose of the present invention is to prevent the droplet leakage of the aluminum alloy laser welding, reduce the flow velocity on the upper surface of the molten pool and improve the welding seam formation without a liner. At the same time, taking into account the experimental function, the test plate moves relative to the rectangular frame, while the laser and magnetic field action area is static relative to the rectangular frame, realizing continuous observation of the welding process.

Description

technical field [0001] The invention belongs to the field of laser processing, in particular to a laser welding experimental device capable of realizing magnetic field-assisted forming. Background technique [0002] Lightweight and high-strength aluminum alloys are widely used in all aspects of national life and national defense construction, such as cars, rail transit, ships, and aerospace, and are an important material for achieving lightweight structures. Among them, welding is an essential key technology in the manufacturing process of aluminum alloy components. [0003] In the prior art, the Chinese patent "An Aluminum Alloy Diffusion Welding Device and Aluminum Alloy Diffusion Welding Method" (publication number: 109175660A) discloses an aluminum alloy diffusion welding device and an aluminum alloy diffusion welding method, which relate to the field of diffusion welding technology. The aluminum alloy diffusion welding device includes a fixture, the linear expansion co...

AI Technical Summary

Problems solved by technology

However, when the workpiece is welded through by laser deep penetration welding, the sum of the gravity on the entire molten pool and the reaction force of the keyhole vapor in the molten pool will be greater than the surface tension at the bottom, and the liquid metal will easily flow down from the bottom of the keyhole, resulting in welding Severe seam leaks form weld bumps, and it is difficult to solve through simple process adjustments

At the same time, on the upper surface of the weld, the lower viscosity of the molten pool will cause violent fluctuations in the molten pool, resulting in poor surface formation of the weld, prone to undercuts and other defects, and reducing structural strength

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