What tolerances can Pressure Sequence Hydroforming hold?
A- Pressure Sequence Hydroforming is a dimensionally stable and robust process. Product features that are produced in the hydroform tool are typically very stable as the entire part profile and all piercing is completed in a single cavity. Typical tolerances at 1.67 Cpk are; i. Surface profile tolerances generally fall between 0.5 mm to 1.00 mm depending on where the surface is in relation to part datums and major bends. ii. Hole position tolerances generally fall between 0.5 mm and 1.25 mm depending on where the hole is placed in relation to part datums and major bends. iii. Datum hole sizes (formed in the hydroform tool) are held to within +/- 0.05mm. iv. Pierced conical holes for self tapping screws are held to + 0.0 / -0.13 mm. v.
