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US 10,478,886 B2Granted
Stamping method and stamping apparatus
AssigneeToyota Boshoku Kabushiki Kaisha
InventorKazuyuki Hirata
Life of this patent
Estimating the term…
Abstract
A recess is formed in a plate-like workpiece. Then, an inner ejector is engaged with the recess to restrict deformation of a body portion. In this state, a flange is formed in the outer periphery of the workpiece. A processed product portion is then punched out.
Claims5
A forming method for stamping a workpiece with a stamping apparatus to obtain a processed product from a portion of the workpiece, the processed product having a body portion, an outer peripheral portion formed in an outer periphery of the body portion, and a recess formed in the body portion, the method comprising:
- forming the body portion in the workpiece with a die such that the recess is formed in the body portion;
- forming ratchets on an inner wall surface of the recess with teeth that are defined on an outer periphery of the die;
- engaging, from a lower side of the workpiece, a restraint member with the formed ratchets in the recess to restrict deformation of the formed recess and the formed ratchets of the body portion;
- and
- forming the outer peripheral portion while the restraint member restricts deformation of the formed recess and the formed ratchets of the body portion.
2 more elements
Dependencies are inferred from the claim text.