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:
Nov. 06, 2012
Filed:
May. 07, 2004
Simone Amorosi, Ecublens, CH;
Ronald Gianotti, Echichens, CH;
Hans Peter Schwob, Uetendorf, CH;
Thomas Sidler, Cossonay, CH;
Christian Wissing, Bern, CH;
Simone Amorosi, Ecublens, CH;
Ronald Gianotti, Echichens, CH;
Hans Peter Schwob, Uetendorf, CH;
Thomas Sidler, Cossonay, CH;
Christian Wissing, Bern, CH;
Lasag AG, Thun, CH;
Abstract
The invention relates to a laser spot welding process for executing a spot weld in two successive steps, namely a first step of preparing the surface state of the material to be welded and a second step of welding as such. The luminous energy (BR) reflected by the weld region of the material is measured in real time during the first step and then processed by a controller circuit () connected to a control circuit () of the laser source (). In this way, the characteristics (LM) of the laser beam are adjusted in real time as a function of the measurements effected to allow effective control of the quality of the weld obtained, and in particular of its dimensions. The invention also relates to a welding device for implementing this process.