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. 24, 2012
Filed:
Jul. 06, 2007
Keiji Nakahara, Yokohama, JP;
Emi Yanagihara, Toyohashi, JP;
Shunzo Aoyama, Toyohashi, JP;
Yasushi Kanno, Toyohashi, JP;
Keiji Nakahara, Yokohama, JP;
Emi Yanagihara, Toyohashi, JP;
Shunzo Aoyama, Toyohashi, JP;
Yasushi Kanno, Toyohashi, JP;
Yorozu Corporation, Yokohama-shi, JP;
Ahresty Corporation, Tokyo, JP;
Abstract
A welding method of carrying out an alternating current arc welding by switching polarities of a voltage applied between a wire and workpieces when weld-connecting the workpieces to each other by use of the wire, the workpieces including an aluminum cast material and an aluminum wrought material. In the welding method, the alternating current arc welding is carried out in a way to satisfy|/(|)≧0.128where A denotes an integrated value of an electric current over a time for which the polarity of the wire is positive, and B denotes an integrated value of an electric current over a time for which the polarity of the wire is negative; and thereby an amount of heat input into the aluminum cast material during the welding is set at not more than 67.8 J/mm.