Method of forming an integral grid reinforcement in a part using an electro-hydraulic forming process

摘要

A method of reinforcing a part formed from a sheet metal panel that has a predetermined area that requires reinforcement by forming a grid pattern of V-shaped channels in the predetermined area. The grid pattern may be formed by wire electrodes in an electro-hydraulic forming tool having a one-sided die. Alternatively, the grid pattern may be formed by a plurality of electrodes that are arranged in an array that is aligned in at least two directions on the opposite side of the part from the one-sided die.

主权项

1. A method of reinforcing a part comprising:
forming a metal panel into a three dimensional shape that includes a predetermined area requiring reinforcement; placing the predetermined area between a one-sided die and an electro-hydraulic chamber that includes a first plurality of wire electrodes that extend in a first direction; discharging a stored electrical charge through the sires to form a first set of grooves into a V-shaped cross-section having an internal radius of less than one-half the thickness of the panel in the one-sided die; placing the predetermined area between the one-sided die and the electro-hydraulic chamber that includes a second plurality of wire electrodes that extend in a second direction that is different than the first direction; and discharging a stored electrical charge through the wires to form a second set of grooves into a V-shaped cross-section having an internal radius of less than one-half the thickness of the panel, wherein the first and second sets of grooves intersect at a predetermined angle.