SPIRAL LASER WELDING METHODS FOR JOINING METAL.

MX434008BActive Publication Date: 2026-05-19CORELASE
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Patent Information

Application Number
MX2023014438
Authority / Receiving Office
MX · MX
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-06-03
Filing Date
2023-12-01
Publication Date
2026-05-19
Estimated Expiration
2042-05-17

AI Technical Summary

Technical Problem

Conventional laser welding methods face challenges in creating high-quality welded joints due to issues such as trapped gas, cooling rate discrepancies, material loss, and cracking, especially when welding dissimilar metals or metals with coatings, which can compromise the strength and conductivity of the joint.

Method used

The use of dual-beam laser radiation with independently controlled central and annular beams tracing spiral patterns to maintain a stable keyhole, minimize splashing, and facilitate gas release, while adjusting power levels to control cooling rates and ensure a strong, crack-free joint.

Benefits of technology

This method achieves high-quality welded joints with minimal trapped gas and cracks, even in challenging scenarios, ensuring reliability and conductivity, particularly effective for dissimilar metals and coated materials.

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Abstract

Laser welding methods include focusing laser radiation (120) onto a first sheet of metal (112) disposed on a metal part (114), optionally with one or more intermediate sheets of metal between them; the laser radiation (120) is directed to trace at least one spiral path for spot welding the metal parts (114); the laser radiation (120) includes a central beam (122C) and an annular beam (122A) to maintain a stable keyhole; one method is designed for welding aluminum parts, for example, with high gas content and / or different compositions, and the laser radiation (120) first traces an outward spiral path (810) and then an inward spiral path (830); the central beam (122C) is pulsed during a segment of the inward spiral path (830);Another method is designed for welding steel or copper parts that have a coating at an interface between them, and the laser radiation (120) traces an inward spiral path (830); the interface (414F) may be a zero-space interface, or there may be a non-zero space.
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