HYDROFORMING, another area of specialty at Hi-Craft Metal Products, is another form of deep drawing used to form more complex shapes. In hydroforming, a metal blank is first placed on a ring. A steel punch then rises through the ring, forcing the sheet metal up into a rubber diaphragm backed by a pressure dome filled with hydraulic fluid. The wear pad exerts uniform pressure over the outer surface of the part, forming it tightly against the tool.
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