Method of manufacturing a formed component

Abstract

Provided is a manufacturing method of a formed product by pressing a blank with a first press mold and a second press mold. The blank includes a top plate portion corresponding portion, a vertical wall corresponding portion, and an extension portion. The manufacturing method includes pressing the blank with the first press mold and the second press mold and forming a top plate portion, a vertical wall portion, and a flange portion while forming a fold on the extension portion. The flange portion is a portion that is formed of the extension portion and that extends from an outer-side edge of the vertical wall portion in a direction intersecting with the vertical wall portion, and the flange portion has a shape curved to form a stretch flange. The fold extends along a longitudinal direction of an outer-side edge of the flange portion.

What is claimed is: 
     
         1 . A method of manufacturing a formed product by pressing a blank with a first press mold and a second press mold, the method comprising:
 arranging the blank between the first press mold and the second press mold spaced apart from each other; and   forming a top plate portion, a vertical wall portion, and a flange portion while forming a fold on an extension portion by bringing the first press mold and the second press mold close to each other in a state where the blank is arranged between the first press mold and the second press mold to thereby press the blank by the first press mold and the second press mold,   the blank including a top plate corresponding portion that corresponds to the top plate portion of the formed product, a vertical wall corresponding portion that corresponds to the vertical wall portion of the formed product, and the extension portion,   the extension portion being an area extending to an outer side from an outer-side edge of the vertical wall corresponding portion, the outer side being a downstream side in a direction from the vertical wall corresponding portion to a side opposite where the top plate corresponding portion is located, in a plane parallel to the blank,   the flange portion being a portion that is formed of the extension portion and that extends from an outer-side edge of the vertical wall portion in a direction intersecting with the vertical wall portion, the flange portion having a shape curved to form a stretch flange, and   the fold extending along a longitudinal direction of an outer-side edge of the flange portion.   
     
     
         2 . The method of manufacturing a formed product according to  claim 1 , further comprising:
 removing a portion of the extension portion that is on the outer side relative to the fold after forming the flange portion.   
     
     
         3 . The method of manufacturing a formed product according to  claim 1 ,
 wherein the top plate portion includes a recessed portion recessed in a thickness direction of the top plate portion.   
     
     
         4 . The method of manufacturing a formed product according to  claim 3 ,
 wherein the recessed portion is formed in advance in the blank before arranging the blank between the first press mold and the second press mold spaced apart from each other.   
     
     
         5 . The method of manufacturing a formed product according to  claim 1 ,
 wherein the formed product is an automobile component.