Press-formed product for vehicles and method of manufacturing the press-formed product

Abstract

A press-formed product of the present disclosure includes a plate-shaped portion, a wall, and a flange. The wall includes at least one curved surface having an arcuate cross-sectional shape that bulges radially outward in a cross-section taken along the plate-shaped portion. The at least one curved surface includes a first curved surface and a second curved surface. The second curved surface is a portion closer to the flange than the first curved surface. A radius of curvature of the second curved surface in the cross-section is configured to be smaller than a radius of curvature of the first curved surface in the cross-section.

What is claimed is: 
     
         1 . A press-formed product comprising:
 a plate-shaped portion;   a wall having a plate shape and extending from the plate-shaped portion in a direction that intersects the plate-shaped portion; and   a flange having a plate shape and extending from an edge of the wall,   wherein the wall includes at least one curved surface having an arcuate cross-sectional shape that bulges radially outward in a cross-section taken along the plate-shaped portion,   wherein the at least one curved surface includes a first curved surface and a second curved surface that is closer to the flange than the first curved surface, and   wherein a radius of curvature of the second curved surface in the cross-section is smaller than a radius of curvature of the first curved surface in the cross-section.   
     
     
         2 . The press-formed product according to  claim 1 ,
 wherein the wall further includes a stepped surface formed between the first curved surface and the second curved surface, and   wherein the second curved surface is located radially outside the first curved surface.   
     
     
         3 . The press-formed product according to  claim 2 ,
 wherein the stepped surface includes a plurality of stepped surfaces and the wall includes the plurality of stepped surfaces.   
     
     
         4 . The press-formed product according to  claim 1 ,
 wherein the press-formed product is a body component of an automobile.   
     
     
         5 . The press-formed product according to  claim 1 ,
 wherein the press-formed product has a bag shape with a recess,   wherein the at least one curved surface includes a plurality of curved surfaces and the wall includes the plurality of curved surfaces, and   wherein the wall further includes a flat portion having a flat plate shape and connecting the plurality of curved surfaces.   
     
     
         6 . A method of manufacturing a press-formed product for obtaining a press-formed product having a specified target shape using a first die and a second die,
 the press-formed product comprising:
 a plate-shaped portion; 
 a wall having a plate shape and extending from the plate-shaped portion in a direction that intersects the plate-shaped portion; and 
 a flange having a plate shape and extending from an edge of the wall, 
 wherein the wall includes at least one curved surface having an arcuate cross-sectional shape that bulges radially outward in a cross-section taken along the plate-shaped portion, 
 wherein the at least one curved surface includes a first curved surface and a second curved surface that is closer to the flange than the first curved surface, and 
 wherein a radius of curvature of the second curved surface in the cross-section is smaller than a radius of curvature of the first curved surface in the cross-section, 
   each of the first die and the second die comprising:
 a first forming portion for forming the plate-shaped portion; 
 a second forming portion for forming the wall; and 
 a third forming portion for forming the at least one curved surface, 
   the method comprising:
 placing a blank between the first die and the second die that are spaced apart from each other; and 
 bringing the first die and the second die closer to each other with the blank placed between the first die and the second die. 
   
     
     
         7 . The method of manufacturing the press-formed product according to  claim 6 ,
 wherein the wall further includes a stepped surface formed between the first curved surface and the second curved surface, and   wherein the second curved surface is located radially outside the first curved surface.   
     
     
         8 . The method of manufacturing the press-formed product according to  claim 7 ,
 wherein the stepped surface includes a plurality of stepped surfaces and the wall includes the plurality of stepped surfaces.   
     
     
         9 . The method of manufacturing the press-formed product according to  claim 6 , wherein the press-formed product is a body component of an automobile.