摘要
To satisfy the requirements for the precise formation of large-scale high-performance lightweight components with inner ring reinforcement, a new multidirectional loading rotary extrusion forming technology is developed to match the linear motion with the rotary motion and actively increases the strong shear force. Its principle is that the radial force and rotating torque increase when the blank is axially extruded and loaded. Through the synergistic action of axial, radial, and rotating motions, the orderly fow of metal is controlled, and the cumulative severe plastic deformation (SPD) of an“uplift-trowel” micro-area is generated. Consequently, materials are uniformly strengthened and toughened. Simultaneously, through the continuous deformation of a punch “ellipse-circle,” a high reinforcement component is grown on the cylinder wall to achieve the high-quality formation of cylindrical parts or the inner-ring-reinforcement components. Additionally, the efective strain increases with rotation speed, and the maximum intensity on the basal plane decreases as the number of revolutions increase. The punch structure also afects the axial extrusion loading and equivalent plastic strain. Thus, the proposed technology enriches the plastic forming theory and widens the application feld of plastic forming. Furthermore, the formed large-scale high-performance inner-ring-stifened magnesium components have been successfully verifed in aerospace equipment, thereby solving the problems of integral forming and severe deformation strengthening and toughening. The developed technology has good prospects for mass production and application.
基金
Supported by National Natural Science Foundation of China(Grant Nos.52075501,51775520)
Joint Funds of National Natural Science Foundation of China(Grant No.U20A20230)
Shanxi Scholarship Council of China(2021-127).
作者简介
Zhimin Zhang,born in 1956,is currently a professor at North University of China,China.He received his PhD degree from Yanshan Universtiy,China,in 2002.His research interests include precision plastic forming,shape plasticity integration research of light alloys;Correspondence:Yong Xue,born in 1978,is currently a professor at North University of China,China.He received his PhD degree from Beihang Universtiy,China,in 2012.His research interests include precision plastic forming,shape plasticity integration research of light alloys.yongxue395@163.com,xueyong@nuc.edu.cn;Xing Zhang,born in 1972,is currently a professor at North University of China,China.He received his PhD degree from North Universtiy of China,China,in 2006.His research interests include precision plastic forming,shape plasticity integration research of light alloys;Beibei Dong,born in 1993,is currently a lecturer at North University of China,China.She received her PhD degree from North Universtiy of China,China,in 2022.Her research interests include precision plastic forming,shape plasticity integration research of light alloys;Mei Cheng,born in 1968,is currentlyis currently a professor at North University of China,China.She received her PhD degree from North Universtiy of China,China,in 2013.Her research interests include precision plastic forming,shape plasticity integration research of light alloys;Zhe Chen,born in 1994,is currently a doctor at North University of China,China.
