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:
Apr. 07, 2020
Filed:
Jul. 29, 2016
Trumpf Laser Gmbh, Schramberg, DE;
Elke Dolores Kaiser, Aichhalden, DE;
TRUMOF LASER GMBH, Schramberg, DE;
Abstract
A laser welding method includes guiding laser pulses to a workpiece surface of workpieces and adjusting a power of the laser pulses according to a time pulse curve to spot weld the workpieces together. The time pulse curve has a first pulse section having a rising pulse flank for generating a melting temperature and subsequently a vaporization temperature in the workpieces, a second pulse section for melt bath generation having a vapor channel in the workpieces, a third pulse section having a pulse flank which initially drops vertically to at least ¾ of the power at an end of the second pulse section and subsequently drops more flatly for reversion of the vapor channel, and a fourth pulse section having a low pulse plateau and a level of between ⅓ and ¼ of the power at the end of the second pulse section for oscillation of the melt.