The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 2022
Filed:
Feb. 10, 2020
Applicant:
Coherent, Inc., Santa Clara, CA (US);
Inventors:
Ryan Brescoe, Ontario, CA;
Jean-Philippe Lavoie, Santa Clara, CA (US);
Assignee:
Coherent, Inc., Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K 26/06 (2014.01); B23K 26/082 (2014.01); B23K 26/70 (2014.01); B23K 26/073 (2006.01); B23K 26/22 (2006.01); B23K 103/10 (2006.01); B23K 103/04 (2006.01);
U.S. Cl.
CPC ...
B23K 26/0626 (2013.01); B23K 26/0665 (2013.01); B23K 26/0734 (2013.01); B23K 26/082 (2015.10); B23K 26/22 (2013.01); B23K 26/702 (2015.10); B23K 2103/04 (2018.08); B23K 2103/10 (2018.08);
Abstract
A method for laser keyhole welding of metal alloys is disclosed. The method independently adjusts power in a focused center beam and power in a concentric focused annular beam. At the termination of a weld, the power in the center beam is initially ramped up and then ramped down, while the power in the annular beam is ramped down. Increasing the power in the center beam enables a controlled and prolonged contraction of the keyhole and melt pool, thereby preventing undesirable cracking.