Press forming process and product formed thereby with high dimensional accuracy, and workpiece used therefor
AssigneeFuji Jukogyo Kabushiki Kaisha
InventorKenichi Arai
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Abstract
A press forming process involves a stretching press to form a product with a curved portion from a workpiece by imparting a pad portion to the workpiece prior to starting the press forming process. The curved portion is prepared by spreading the pad portion mainly into the longitudinal direction of the workpiece, so that the curved portion is prepared so as to have a spring back of the product minimized.
Claims13
A press forming process using a stretching press to form a product with a curved portion from a workpiece, comprising:
- providing a pad portion to said workpiece prior to starting the press forming process,
- completing a formation of said workpiece by spreading said pad portion mainly in a longitudinal direction of said workpiece, whereby said curved portion is prepared so as to have a spring back of said product minimized.
A product pre pared by a press forming process using a stretching press to form a product with a curved portion from a workpiece, said press forming process comprising:
- providing a pad portion to said workpiece prior to starting the press forming process, and
- completing formation of said curved portion by spreading of said pad portion mainly in the longitudinal direction of said workpiece, whereby said curved portion is prepared so as to have a spring back of said product minimized.
A workpiece comprising a portion including a pad portion for providing a dimensionally accurate product used in a press forming process.
Dependencies are inferred from the claim text.