Method For Manufacturing Metal Processed Article, And Metal Processed Article

Abstract: Provided is a method for manufacturing a metal processed article, whereby it is possible to reduce the height of a protrusion originating from a protruding part remaining after a coining step. A method for manufacturing a metal processed article according to the present invention comprises a half-cutting step, a finish cutting step, and a coining step. With respect to the half-cutting step, a clearance C31-41 (mm) between a first die and a first punch is set to a negative clearance, a cutting edge of the first die and a cutting edge of the first punch are formed in rounded shapes having predetermined radii of curvature RD1 and RP1 (mm), a protruding part having a height h (mm) is formed on a half-cutting part, and the height h (mm) corresponds to the separation distance along the pressing direction of the first die between the position on the cutting edge of the first punch on an extension line of the side surface of the first die and an extension line of the upper surface of the first punch in contact with the lower surface of a first element body. With respect to the coining step, the pad has a vertical wall surface, a bottom wall surface, and a pressing surface, and when the area of the area of the region surrounded by the extension surface of the vertical wall surface, the extension surface of the bottom wall surface, and the pressing surface is defined as the coining area Ar, the coining area Ar is set so as to satisfy the following expression: h = -1.09Ar + 1.04.

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