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:
Jan. 15, 2013
Filed:
Jul. 14, 2010
Tiejun MA, Tecumseh, CA;
Thomas Jaeger, Tilbury, CA;
Tiejun Ma, Tecumseh, CA;
Thomas Jaeger, Tilbury, CA;
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
A method of monitoring contact tip useful life in a welding torch includes measuring at least one of welding current (I) and welding voltage (V) of the contact tip mounted in the welding torch. Deterioration of the contact tip is quantified based on one or both of (i) a decrease of the welding current and increase of a standard deviation of the welding current (sd_I), and (ii) an increase of the welding voltage. Deterioration of the contact tip may be quantified by calculating an index of contact tip life (ITL) based on the welding current and standard deviation of the welding current and/or by calculating a reference index of contact tip life (ITL_v) based on the welding voltage.