Manufacturing method of press-formed product

Abstract

A manufacturing method of a press-formed product includes: forming a through part in a workpiece; bending the workpiece containing the through part to form an intermediate product in which a first wall part, a second wall part, and a bent part are formed, and removing an excess part from the intermediate product. The through part is formed in the workpiece so as to be in a position, in the intermediate product, where a boundary line between the second wall part and the excess part intersects with the bent part. The intermediate product is cut along a boundary line between the first wall part and the excess part from a direction intersecting with the first wall part and cut along the boundary line between the second wall part and the excess part from a direction intersecting with the second wall part, to thereby remove the excess part from the intermediate product.

What is claimed is: 
     
         1 . A manufacturing method of a press-formed product that includes a first wall part, a second wall part intersecting with the first wall part, and a bent part connecting the first wall part and the second wall part to each other, the manufacturing method comprising:
 forming, in a workpiece, a through part that runs through the workpiece;   bending the workpiece in which the through part is formed to form an intermediate product in which the first wall part, the second wall part, and the bent part are formed; and   removing an excess part from the intermediate product to obtain the press-formed product, the excess part being continuous with each of the first wall part, the second wall part, and the bent part in the intermediate product,   the through part being formed in the workpiece so as to be in a position, in the intermediate product, where a boundary line between the second wall part and the excess part intersects with the bent part, and   the intermediate product being cut along a boundary line between the first wall part and the excess part from a direction intersecting with the first wall part and cut along the boundary line between the second wall part and the excess part from a direction intersecting with the second wall part, to thereby remove the excess part from the intermediate product.   
     
     
         2 . The manufacturing method of a press-formed product according to  claim 1 ,
 wherein the through part is formed in the workpiece such that, in the intermediate product, an area in which the through part is arranged overlaps at least with the bent part in cross-sectional view perpendicular to a ridge line of the bent part.   
     
     
         3 . The manufacturing method of a press-formed product according to  claim 1 ,
 wherein at least part of the second wall part is curved so as to be convex toward a side where the first wall part is located.   
     
     
         4 . The manufacturing method of a press-formed product according to  claim 1 ,
 wherein the intermediate product is cut along the boundary line between the first wall part and the excess part from a direction perpendicular to the first wall part and cut along the boundary line between the second wall part and the excess part from a direction perpendicular to the second wall part.   
     
     
         5 . The manufacturing method of a press-formed product according to  claim 1 ,
 wherein the workpiece is made of a high-tensile steel material.