MUMBAI, India, Oct. 26 -- Intellectual Property India has published a patent application (202617090926 A) filed by Jfe Steel Corporation on July 27, 2026, for Method For Manufacturing Resistance Spot Welding Joint.
Inventors include Munemura Naoaki; Taniguchi Koichi; and Sawanishi Chikaumi.
The application for the patent was published on October 23, 2026, under issue no. 43/2026.
Abstract: Provided is a method for manufacturing a resistance spot welded joint in which nugget diameter stability is excellent. In test welding, preliminary energization by constant current control in two or more patterns and main energization are performed, preliminary energization is performed under the same energization conditions and a pressing force of less than 2.5 kN, and the electric characteristics between the electrodes during the preliminary energization and a curve of the change over time of the instantaneous heat generation amount per unit volume during the main energization are stored. In main welding, the preliminary energization by the constant current control is performed under the same energization conditions as the preliminary energization of the test welding, the target value of the main energization in the main welding is set by comparing the electric characteristics between the electrodes of the preliminary energization, and then adaptive control welding for controlling the energization amount of the main energization is performed.
Disclaimer: Curated by HT Syndication.
