MUMBAI, India, June 24 -- Intellectual Property India has published a patent application (202617062096 A) filed by Jfe Steel Corporation on May 15, 2026, for Method For Designing Preforming Shape, Method For Manufacturing Press-Molded Article, And Program.
Inventors include Nakagawa Kinya; and Shinmiya Toyohisa.
The application for the patent was published on June 12, 2026, under issue no. 24/2026.
Abstract: The present invention provides technology that makes it possible to more easily design a preforming shape. Provided is a method for designing a preforming shape of an intermediate component. The method comprises: a position identification step (20) for identifying a crack occurrence position at which a crack is estimated to occur in a press-molded article that is obtained from molding when, in a single instance of press molding, a metal plate is press-molded to the bottom dead center of a die that enables molding to a target shape; a first surface area calculation step (21) for finding the surface area (A1) of the target shape that is positioned in a first region within a pre-set distance (L0) from the crack occurrence position; a basic shape setting step (22) for setting a basic shape of a preforming shape on the basis of the target shape; a second surface area calculation step (23) for determining a surface area (A2) of the basic shape that is positioned in a second region within the distance (L0) from a position corresponding to the crack occurrence position; and a basic shape modification step (24) for modifying the basic shape so as to satisfy expression (1). Expression (1): 0.9×A1A21.1×A1
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