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:
May. 01, 2001
Filed:
Jun. 15, 1999
Applicant:
Inventors:
Atsuhiro Kawamoto, Hyogo, JP;
Koji Hamamoto, Hyogo, JP;
Yoshiaki Tanaka, Osaka, JP;
Akira Nakagawa, Hyogo, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K 9/09 ;
U.S. Cl.
CPC ...
B23K 9/09 ;
Abstract
When a welding voltage is lowered, a pulse period is shortened or a peak current is reduced so that an average of a pulse frequency is not changed. Therefore, short circuit is regularly generated and a quantity of generated spatter is reduced. When the welding voltage is changed immediately before a melting drop separates from a tip of a wire, separation of the melting drop is predicted and the pulse period is ended. Due to the foregoing, a melting drop is regularly shifted at each pulse, and a quantity of generated spatter is reduced.