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:
Dec. 25, 2012
Filed:
Dec. 17, 2009
Hideo Shiozaki, Osaka, JP;
Futoshi Nishisaka, Osaka, JP;
Norihito Takahashi, Osaka, JP;
Toshiro Uezono, Osaka, JP;
Hiroyasu Mondori, Osaka, JP;
Shugo Hirota, Osaka, JP;
Shinichiro Nakagawa, Osaka, JP;
Tomoyuki Ueyama, Osaka, JP;
Hideo Shiozaki, Osaka, JP;
Futoshi Nishisaka, Osaka, JP;
Norihito Takahashi, Osaka, JP;
Toshiro Uezono, Osaka, JP;
Hiroyasu Mondori, Osaka, JP;
Shugo Hirota, Osaka, JP;
Shinichiro Nakagawa, Osaka, JP;
Tomoyuki Ueyama, Osaka, JP;
DAIHEN Corporation, Osaka, JP;
Abstract
A control method for AC pulse arc welding performed upon application of cyclic AC welding current is provided. The welding current has a cycle including an electrode negative polarity period and an electrode positive polarity period subsequent to the electrode negative polarity period. In the control method, an electrode negative polarity base current and a subsequent electrode negative polarity peak current are applied during the electrode negative polarity period. The electrode negative polarity base current has an absolute value smaller than a first critical value, and the electrode negative polarity peak current has an absolute value greater than the first critical value. Then, an electrode positive polarity peak current is applied during the electrode positive polarity period. The electrode positive polarity peak current has a value greater than a second critical value.