Author:
Wang Dahao,Zhu Zhenyu,Pan Fei,Sun Xiaoming,Cui Xiaohui,Fang Jinxiu
Abstract
Abstract
Aiming at the problem of a small area at the end of the tube and the asynchronous rate of traditional mechanical forming and electromagnetic forming, a new technology of axial compression electromagnetic bulging is proposed with 5052 aluminum alloy tube. In this study, multiple sets of electromagnetic coils are arranged. At the moment of discharge, the radial electromagnetic force generated by the bulging coil bulges the tube, and meanwhile, the booster coil generates axial magnetic force at the end of the tube, which axial feeding the material in time. Based on multi-physical field element simulation and experimental study, the influence of main process parameters on uniform tube bulging is analyzed, and it is revealed that the axial magnetic force produced by the booster coil at the end of the tube is the main factor to improve the plastic deformation ability of the tube in the process of axial compression electromagnetic bulging, the principal stress of typical point changes from biaxial tensile stress state to one tension one compression state, and the proportion of compressive stress is increased, thus the forming limit is increased.
Publisher
Research Square Platform LLC