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AssigneeJfe Steel Corporation
InventorsKento Fujii, Yuji Yamasaki
Estimating the term…
A technology for evaluating forming allowance for a bending crack at a sheared end face of the press-formed component from shape information of an actual component. The method includes applying press forming including bending deformation to a metal sheet being sheared to manufacture a press-formed component, evaluating forming allowance for a bending crack at a sheared end face being an end face subjected to the shearing. A crack index value for evaluating the bending crack at the sheared end face of the press-formed component is obtained from a bend outer side strain at or near the sheared end face acquired on a basis of a component shape of the press-formed component and a press die bend radius at a portion forming the sheared end face in a press die used in the press forming, and the forming allowance for the bending crack is evaluated by the obtained crack index value.
A bending crack evaluation method for, when applying press forming including bending deformation to a metal sheet subjected to shearing to manufacture a desired press-formed component, evaluating a bending crack at a sheared end face being an end face subjected to the shearing, the method comprising obtaining a crack index value for evaluating the bending crack at the sheared end face of the press-formed component from a bend outer side strain at or near the sheared end face acquired on a basis of a component shape of the press-formed component and a press die bend radius at a portion forming the sheared end face in a press die used in the press forming.
A bending crack evaluation method for, when applying press forming including bending deformation to a metal sheet subjected to shearing to manufacture a desired press-formed component, evaluating a bending crack at a sheared surface being an end face subjected to the shearing, the method comprising acquiring a bend outer side strain and a bend radius at or near the sheared end face on a basis of a component shape of the press-formed component and obtaining a crack index value for evaluating the bending crack at the sheared end face of the press-formed component from the acquired bend outer side strain and bend radius.
A bending crack evaluation method for, when applying press forming including bending deformation to a metal sheet subjected to shearing to manufacture a desired press-formed component, evaluating a bending crack at a sheared end face being an end face subjected to the shearing, wherein the bending crack at the sheared end face of the press-formed component is evaluated from a stress gradient in a sheet thickness direction and a bend outer side strain at or near the sheared end face to be evaluated, the stress gradient and the bend outer side strain being acquired on a basis of shape information of the press-formed component.
A bending crack evaluation system for, when applying press forming including bending deformation to a metal sheet subjected to shearing to manufacture a desired press-formed component, evaluating a bending crack at a sheared end face being an end face subjected to the shearing, the system comprising a crack index value calculation unit configured to input a bend outer side strain at or near the sheared end face acquired on a basis of a component shape of the press-formed component and a press die bend radius at a portion forming the sheared end face in a press die used in the press forming and obtain a crack index value for evaluating the bending crack at the sheared end face of the press-formed component from the input bend outer side strain and bend radius.
A bending crack evaluation system for, when applying press forming including bending deformation to a metal sheet subjected to shearing to manufacture a desired press-formed component, evaluating a bending crack at a sheared end face being an end face subjected to the shearing, the system comprising a crack index value calculation unit configured to input a bend outer side strain and a bend radius at or near the sheared end face acquired on a basis of a component shape of the press-formed component and obtain a crack index value for evaluating the bending crack at the sheared end face of the press-formed component from the input bend outer side strain and bend radius.
Dependencies are inferred from the claim text.