6063铝合金中空构件充液压形成形

To promote the application of aluminum alloy hollow components in automobile bodies, a forming technology at room temperature, named as low-pressure hydroforming, was investigated and verified. Experiments and simulations were conducted to reveal the effects of internal pressure and the main defects in forming process and the causes of each defect were summarized. The results indicate that aluminum alloy hollow component can be formed successfully at room temperature by low-pressure hydroforming technology. The forming pressure is low, and the required pressure at room temperature is only 2-10 MPa. Unstable buckling and dead wrinkles are main defects among low-pressure hydroforming. Unstable buckling defects can be eliminated by increasing the internal pressure. Dead wrinkles can be overcome by controlling the expansion deformation degree. For aluminum alloy hollow components, springback is negligible among low-pressure hydroforming when the internal pressure increases to 6 MPa, although bending moment is the main deformation driving force.