Method for removing strain from press-formed workpiece, and forming press
AssigneeAraco Kabushiki Kaisha
InventorsNaoki Yoshioka, Kenichi Kusunoki, Yuichi Yagami, Mikio Wada, Tsuyoshi Takahashi
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Abstract
In a forming press, a blank is pressed formed into a press-formed workpiece by means of an upper die and a lower die, while a peripheral edge portion of the blank is clamped by means of a die and a blank holder insert of the forming press. Subsequently, a central portion of the press-formed workpiece is partially held by means of the upper die and the lower die so as to draw a peripheral portion of the press-formed workpiece away from the central portion thereof, thereby removing strain from the press-formed workpiece.
Claims10
A method for removing strain from a press-formed workpiece, comprising a step of drawing a peripheral portion of a press-formed workpiece away from a central portion thereof while maintaining the press-formed workpiece in a pressed state, so as to impart plastic deformation to the press-formed workpiece, to thereby remove strain from the press-formed workpiece.
A method for removing strain from a press-formed workpiece, comprising a step of:
- providing a press-formed workpiece which is obtained by pressing a blank in a press direction, while clamping a peripheral edge portion of the blank, by use of a forming press;
- and
- partially holding a central portion of the press-formed workpiece and moving the central portion in the press direction so as to draw a peripheral portion of the press-formed workpiece away from the central portion for imparting plastic deformation to the press-formed workpiece, to thereby remove strain from the press-formed workpiece.
A forming press comprising a movable section which enables drawing a peripheral portion of a press-formed workpiece away from a central portion thereof in a state in which the press-formed workpiece is pressed by an upper die and a lower die.
Dependencies are inferred from the claim text.