Press coining systems and methods

A method for forming a stiffened panel, the method comprising:

• moving a metal blank over a first die, wherein the metal blank comprises an initial thickness;
• moving a second die toward the second die;
• compressing the metal blank between the first die and the second die, wherein the second die comprises a plurality of discrete protrusions extending from a base surface of the second die and forming a grid structure in a negative space therebetween;
• and
• moving material of the metal blank from between the plurality of discrete protrusions and the first die to the grid structure, thereby forming the stiffened panel comprising a skin and a grid of stiffening ribs;
• wherein the skin has a skin thickness which is less than the initial thickness;
• and
• the grid of stiffening ribs has a rib height which is greater than the initial thickness.

A method for forming a stiffened panel, the method comprising:

• press coining a metal blank with a first die and a second die to form a skin and a grid of stiffening ribs extending from the skin;
• removing material from the metal blank to achieve at least one of a desired rib width of the grid of stiffening ribs or a desired thickness of the skin;
• and
• compressing the grid of stiffening ribs to flare an end of each stiffening rib of the grid of stiffening ribs;
• wherein, prior to the press coining, the metal blank comprises an initial thickness;
• and
• after the press coining and prior to removing the material, the skin has a skin thickness which is less than the initial thickness and the grid of stiffening ribs has a rib height which is greater than the initial thickness.