| 摘要 |
<p>If a metal component with a three-dimensional edge is manufactured by a conventional press forming die, a crack and creases occur in a simple process, the target shape of the metal component with the three-dimensional edge cannot be achieved, and thereby it is extremely difficult to achieve both the simplification of the process and the weight reduction of a product. A method for manufacturing a metal component with a three-dimensional edge is designed to manufacture a metal component with a three-dimensional edge by using, as a material, a blank (10) that is cut from a metal plate and has a curved edge portion (15) having a curved shape with both ends, and three-dimensionally forming the curved edge portion or further a blank portion adjacent to the curved edge portion, and comprises: as a first step, a fold line application step for applying, to the curved edge portion, a fold line of either a mountain fold or a valley fold along a curve of the curved edge portion, the fold line having a bent cross-section with a bend radius of 0.5-30 mm inclusive; and as a second step, a three-dimensional forming step for moving both the ends of the curved edge portion such that the distance between both the ends is narrowed or widened to thereby three dimensionally form the curved edge portion or further the blank portion adjacent to the curved edge portion with the fold line as a starting point.</p> |
