How hydroforming die works

The process of hydroforming die starts with a blank tube of metal, which is then put into a custom tool designed to let the tube expand into to the designated shape. The hydroforming toolis closed around the tube, the ends of the tube are sealed off with hydraulic rams, and water is forced into the tube.

When the water is pressurized, the metal “balloons” into the shape of the mold. Simultaneously, a computer drives the hydraulic rams against the ends of the tube to in-feed the metal as it expands, resulting in smooth, consistently thick walls and graceful, repeatable shapes. Once the water and part are removed, the system is ready for the next blank.