Coaxial type ultrasound and resistance coupling welding device and welding method

Abstract

The invention discloses a coaxial type ultrasound and resistance coupling welding device and a welding method. The welding device comprises an upper ultrasound applicator, an upper annular electrode, a lower ultrasound applicator and a lower annular electrode, wherein the upper ultrasound applicator is coaxially sleeved with the upper annular electrode, and the lower ultrasound applicator is coaxially sleeved with the lower annular electrode. The upper ultrasound applicator and/or the lower ultrasound applicator are/is connected with a first servo pressurization device, and the upper annular electrode and/or the lower annular electrode are/is connected with a second servo pressurization device. The welding method includes a prepressing step, an electroplastic induction solid-phase connecting step, a nugget forming step and an ultrasound vibration cooling crystallization step. The coaxial type ultrasound and resistance coupling welding device and the welding method can guarantee that ultrasound vibration and resistance heating can simultaneously act on a welding spot, the ultrasound welding process and the resistance spot welding process are coupled effectively, the ultrasound cavitation cleaning effect is introduced, and metal generates the electroplastic effect and the high-frequency ultrasound fine grain effect in the welding procedure, so that nonferrous metal, high-strength steel and other typical metal materials difficult to weld can be welded in a high-efficiency, high-quality and low-energy-consumption mode.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for efficient joining together various types of material without generating excessive thermal strain while maintaining their integrity. It involves applying an electrical force between two parts made from dissimilar materials called rings and/or elec trodes placed inside them. These forces help create tiny cracks within these components when they melt due to frictional contact caused by pressure waves produced by ultrasound waveform transmission. Ultraviolet ray irradiation further enhances fusion bondability and improves weld quality. Ultrasonics have been found effective in producing fine particles (nano-particles), increasing harden nodule formation and enhancing corrosion performance. Chemically cleanable surfaces like plasma etchants may replace expensive solvents.

Problems solved by technology

Technologies described by this patents involve developing new methods for joining different types of materials together without causing damage from electrical spark discharge (ESD). These techniques include both conventional resistance spotwelding processes and ultrasound spot winding connections. While these technical solutions aim to overcome limitations associated with traditional approaches like direct loading of ultraviolet laser waves onto the surface being joined, they require an excessive amount of energy input and may result in reduced strength compared to pure electric currents.

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