Research on numerical simulation and forming uniformity of electromagnetic incremental tube bulging

This paper proposed a novel technology,named tube electromagnetic incremental bulging,which integrates the incremental forming technology into traditional electromagnetic tube bulging.A suitable sequential coupling method was developed to simulate the electromagnetic incremental tube bulging.Compared with experimental data of three groups,the simulation values were in good agreement with the experimental ones.Based on the above researches,the numerical simulation method was used to analyze the main effect factors on forming uniformity,such as overlap rate and forming order.The results showed the optimum overlap rate(50%) and forming order(b→c→a) led to the best forming uniformity.The experimental and numerical simulation results both demonstrated the feasibility of the electromagnetic incremental technology in tube bulging.