Title:
LASER APPARATUS USING OPTICAL FIBERS FOR STABLE LASER WELDING, AND LASER WELDING METHOD USING SAME
Document Type and Number:
WIPO Patent Application WO/2022/050538
Kind Code:
A1
Abstract:
The present invention relates to a laser apparatus using optical fibers for stable laser welding and a laser welding method using same. Hybrid ring mode-shaped laser beams, in which a central beam using fiber laser is positioned at the center of outer beams using diode laser, are used to perform welding by irradiating a to-be-welded portion of an object with the outer beams, the central beam, and the outer beams in this order. Thus, since the welding is performed using the central beam as a heat source in a state in which the to-be-welded portion of the object has been heated with a sufficient amount of heat input, the temperature gradient of the to-be-welded portion is low and solidification cracking does not occur. Also, problems such as spatter and voids can be minimized, and the laser welding is stable, and thus a quality of welding that is uniform and stable overall can be obtained.
Inventors:
HANN SWOOK (KR)
Application Number:
PCT/KR2021/007701
Publication Date:
March 10, 2022
Filing Date:
June 18, 2021
Export Citation:
Assignee:
KOREA PHOTONICS TECH INST (KR)
International Classes:
B23K26/21; B23K26/03; B23K26/323; C21D9/50; B23K103/10
Foreign References:
| JP2004358521A | 2004-12-24 | |||
| JP2004337881A | 2004-12-02 | |||
| KR20120052486A | 2012-05-24 | |||
| KR20040060630A | 2004-07-06 | |||
| JP2017207344A | 2017-11-24 |
Attorney, Agent or Firm:
KIM, Tae Young (KR)
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