US Patent Issued to JFE STEEL on July 15 for "Resistance spot welding method and weld member production method" (Japanese Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,358,067, issued on July 15, was assigned to JFE STEEL Corp. (Tokyo).

"Resistance spot welding method and weld member production method" was invented by Chikaumi Sawanishi (Tokyo), Yasuaki Okita (Tokyo) and Hiroshi Matsuda (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a resistance spot welding method by which a desired nugget diameter can be stably obtained without expulsion even when the effect of a disturbance is significant.An electrode force FA of a main current passage after an intermediate welding time Ta is set based on an average value or time integration value RA of a resistance between electrodes from the start of main curre...