Plastic deformation mechanism of thin-walled ellipsoidal parts under multi-pass stamping and electromagnetic incremental forming composite process
To solve the problems of instability wrinkling,excessive size differences and complicated equipment of large-size thin-walled ellipsoidal parts with variable curvatures,the method of manufacturing thin-walled ellipsoidal parts through multi-pass stamping and incre-mental forming with toroidal coils was proposed.The effects of quasi-static stamping and multiple coil discharges on the stress and strain state and forming quality of parts in different regions were analyzed by ANSYS and ABAQUS software.The results show that the sheet met-al area directly opposite the toroidal coil is highly deformed under the influence of electromagnetic force,and the circumferential compres-sive stress of the material appears high frequency vibration and greatly attenuates,which effectively inhibits wrinkling.When the tradition-al direct stamping height is 60 mm,the wrinkle displacement of the sheet metal reaches 7 mm.Wrinkling of parts is completely sup-pressed through the composite method of multi-pass stamping and electromagnetic forming.Based on the optimal process parameters ob-tained by finite element simulation,experimental tooling was established and ellipsoidal parts with a smooth surface were obtained.
NETL
NSTL
万方数据
维普
