电工技术学报2025，Vol.40Issue(7)：2007-2019,13.DOI:10.19595/j.cnki.1000-6753.tces.240556
多边形金属板件洛伦兹力驱动冲压成形动态过程分析及成形效果优化
Dynamic Process Analysis and Optimization of Forming Effects in Lorentz Force Stamping for Polygonal Sheet Metal
摘要
Abstract
Comparison with the conventional quasi-static stamping technology,the utilization of Lorentz force-driven stamping technology has the potential to significantly enhance the forming limit of sheet metal.Nevertheless,the extant research merely corroborated the viability of this approach,yet did not investigate the ultimate forming quality,which is challenging to align with the diverse requirements of the industry.Consequently,a Lorentz force stamping scheme for polygonal sheet metal is put forth in this paper.A finite element model is constructed to examine the dynamic process and forming effect,and the forming effect is optimized. Firstly,the basic model of the stamping system is established,and the most important parts of the system driver and punch are designed,and the circuit with continuous flow circuit is used to generate repulsive force to drive the forming.Secondly,because the forming process is very fast,a simulation model must le established to study the forming dynamic process and the final forming effect in detail.Finally,a fully coupled electromagnetic and mechanical field model is established to verify the feasibility of the proposed scheme. The simulation results demonstrate that the forming process of this scheme can be divided into three distinct stages:the acceleration stage,the inertia stage,and the rebound stage.The maximum forming depth achieved was 35.00 mm,with the plate exhibiting smooth sticking.The equivalent strain level was low,with a maximum thinning rate of 20.13%.The shaped plate exhibited an effective forming effect.The maximum thinning rate was optimized by manipulating the holding force,friction coefficient and discharge voltage.The maximum thinning rate was reduced to 8.31%under the optimal parameter combination. The conclusions are as follows:(1)The scheme is capable of forming polygonal sheet metal at a significantly higher speed than the traditional quasi-static forming method,while also enhancing the forming limits of sheet metal.The final forming effect is satisfactory.(2)The method exhibits characteristics of both electromagnetic forming and traditional quasi-static forming.The forming process is completed within 2.50 ms,which is a relatively short time.The forming dynamic process is divided into three stages according to the speed change of the driving device:accelerating dynamic stage,inertia stage and rebound stage.The principal forming stage is the inertial movement stage,which ensures the subsequent forming effect.(3)The friction coefficient,the blank holding force,and the discharge voltage have been selected to further optimize the maximum thinning rate.Following the optimization process,the optimal parameter combination was identified as a friction coefficient of 0.171,a blank holding force of 81.95 kN,and a discharge voltage of 11.74 kV for the drive circuit.At this juncture,the maximum thinning rate of the plate is 8.31%,which represents a 58.71%increase over the preceding baseline.关键词
电磁成形/洛伦兹力/板件/成形效果/减薄率Key words
Electromagnetic forming/Lorentz force/sheet metals/forming effect/reduction rate分类
信息技术与安全科学引用本文复制引用
熊奇,陈开创,马朝杰,王毅哲,阎诺..多边形金属板件洛伦兹力驱动冲压成形动态过程分析及成形效果优化[J].电工技术学报,2025,40(7):2007-2019,13.基金项目
武汉强磁场学科交叉基金资助项目(WHMF202121). （WHMF202121）
