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:
Aug. 11, 2026
Filed:
Feb. 08, 2023
Kabushiki Kaisha Toyota Chuo Kenkyusho, Nagakute, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Hideaki Matsuoka, Nagakute, JP;
Gaku Kitahara, Nagakute, JP;
Tatsuyuki Amago, Nagakute, JP;
Hiroyuki Mori, Nagakute, JP;
Jun Yaokawa, Nagakute, JP;
Kyosuke Izuno, Nisshin, JP;
Shuhei Ogura, Nagakute, JP;
Tomohiko Sekiguchi, Nagakute, JP;
Ayaka Kagami, Inazawa, JP;
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, Nagakute, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A spot welding method including: a main energization step of energizing a pair of opposing electrodes in pressure contact with both outer surfaces of a set of sheets where multiple sheet materials are stacked, thereby to cause melting between facing surfaces of the sheet materials; and a pressing variation step of, prior to the main energization step, causing a pulsation of pressing force applied to the set of sheets from the electrodes. A resin material such as an adhesive or a sealant may be interposed between the facing surfaces of at least a pair of the sheet materials. The period of the pulsation is 0.01 to 0.7 seconds. The amplitude of the pulsation is 10% to 90% with respect to a reference value of the pressing force. The set of sheets may include a first and a second steel sheet, and an aluminum alloy sheet that are stacked in order.