Can holes be pierced during hydroforming?
A- Pressure Sequence Hydroforming is the world leading technology for piercing holes in the hydroform die. Vari-Form currently forms as many as 83 holes in the hydroform tool per part. Hole size can range from as small as 2 times material thickness to as large as 50 mm X 200 mm. Holes can be extruded or clean pierced, and practically any shape including round, slot, square, hexagon, or rectangular. The resulting material slug is typically pushed back out of the way and left attached inside the tube, though there are techniques available to remove them when required.
