Method for designing mold shape and method for producing pressed part
AssigneeJfe Steel Corporation
InventorsYusuke Fujii, Yuji Yamasaki
Life of this patent
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Abstract
A preformed shape capable of suppressing occurrence of cracks and wrinkles in a metal sheet can be determined by simple means. A metal sheet is press formed into a three-dimensionally shaped component. A method therefor includes a first step of press forming the metal sheet into an intermediate component having a preformed shape including a shape of the three-dimensionally shaped component crushed under a load applying condition for applying load in a direction in which at least a part of the three-dimensionally shaped component is straightened and a second step of press forming the intermediate component into the three-dimensionally shaped component.
Claims20
A method for designing a die shape that is a method for designing a die shape for use in a press step before a final press step when forming a metal sheet into a three-dimensionally shaped component by a plurality of stages of press steps, the method comprising designing the die shape in such a manner as to form into a pressed component having a preformed shape including a shape of the three-dimensionally shaped component crushed in a direction in which a shape of at least a part of the three-dimensionally shaped component is straightened.
A method for manufacturing a pressed component by press forming a metal sheet into a three-dimensionally shaped component, the method comprising:
- a first step of press forming the metal sheet into an intermediate component having a preformed shape including a shape of the three-dimensionally shaped component crushed in a direction in which a shape of at least a part of the three-dimensionally shaped component is straightened;
- and
- a second step of press forming the intermediate component into the three-dimensionally shaped component.
Dependencies are inferred from the claim text.