Analysis of electromagnetic force and deformation behavior in electromagnetic forming with different coil systems

摘要

As a high-speed forming technology, electromagnetic forming has been more and more widely used because it can improve the material forming performance greatly. In electromagnetic forming process, the pulsed electromagnetic force generated by the coils is the load of the workpiece, hence its distribution characteristics have a great influence on the workpiece forming performance. Based on the basic principle of electromagnetic forming, this paper introduces and analyzes some latest electromagnetic forming technologies with different coil systems, including electromagnetic incremental forming, space-timecontrolled multi-stage pulsed magnetic field forming, and electromagnetic tube expansion with axial compression. Aim at each forming method, the following contents are mainly studied: 1) The key technical problems solved by this method. 2) The structure of the coil system. 3) The distribution of magnetic flux density and electromagnetic force. 4) The advantages and disadvantages of the method. Through above analysis, it is hoped that the basic idea of technological innovation in electromagnetic forming is clarified in this paper, which can provide guidance for the future innovation direction of electromagnetic forming.