Ultrasonic vibration assisted laser welding platform

By setting up an exciter and an amplitude transformer on the laser welding platform to transmit transverse ultrasonic vibration, the problems of insufficient molten metal mixing and complex equipment in the prior art are solved, achieving high-precision thin plate welding and improving the molten pool stirring effect and porosity suppression effect.

CN120962181BActive Publication Date: 2026-06-30WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Filing Date
2025-08-11
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In existing laser welding technologies, longitudinal ultrasonic vibration is difficult to directly act on the horizontal direction of the molten pool, resulting in insufficient mixing of molten metal and expansion of the heat-affected zone. Furthermore, transverse ultrasonic vibration devices are complex and interfere with the laser path, limiting the flexibility of laser head movement and making them unsuitable for processing thin plates or heat-sensitive materials.

Method used

An ultrasonic vibration-assisted laser welding platform is designed, which consists of a platform frame, a working platform, a fixture, and an exciter. The exciter transmits transverse ultrasonic vibration in the XY plane, and the amplitude transformer and piezoelectric ceramics are used to achieve efficient transmission of ultrasonic vibration, avoiding interference with the laser optical path and the fixture.

Benefits of technology

It improves the stirring effect of the molten pool and the suppression of porosity, thereby enhancing welding precision. It is suitable for thin plate materials, and the device has a simple structure that does not affect the flexibility of the laser head movement.

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Abstract

This application discloses an ultrasonic vibration-assisted laser welding platform. The platform comprises a platform frame, a working platform, a fixture, several vibrators, and a control panel. An inner frame and an outer frame are set within the platform frame. The working platform is placed within the inner frame, and the fixture is placed on the working platform. The control panel is fixed to the outer side of the outer frame and connected to the vibrators via wires. Several vibrators are evenly distributed between the inner and outer frames, passing through the sidewalls of the inner frame and connecting to the working platform. This allows the vibrators to transmit transverse ultrasonic vibrations to the working platform during welding, resulting in a stronger molten pool stirring effect and more effective porosity suppression, making it suitable for thin-plate laser welding. Furthermore, this embodiment does not interfere with the laser beam path, fixture, or laser head, thus effectively improving welding accuracy. This application can be applied to the field of ultrasonic-assisted laser welding technology.
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