平板电磁成形时匀压力线圈及板料受力研究  

The force born by the coils and blanks in electromagnetic bulging process

作　　者：崔晓辉[1] 莫健华[1] 韩飞[2] 肖师杰[1] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074 [2]北方工业大学机电工程学院,北京100144

出　　处：《华中科技大学学报（自然科学版）》2011年第2期61-63,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50875093)

摘　　要：鉴于电磁成形过程中线圈在工件上产生的磁场力对工件的最终成形结果有很大的影响,传统的平板螺旋线圈在平板上不能得到一致的磁压力分布,限制了平板的成形.为解决这一问题,采用数值模拟方法,针对平板电磁成形过程中的匀压力线圈,分析平板及匀压力线圈所受到的洛伦兹力大小分布.研究结果表明,在一定的区域内平板上的洛伦兹力分布较为均匀;线圈四周受到使其膨胀的洛伦兹力,但是由于外部通道和线圈中浇注的树脂的作用,导致线圈的失效部位容易发生在与板料靠近表面的中部区域.The magnetic forces, which are induced by the coils, and exerted on workpieces influence final deformation shape of the workpieces greatly. Magnetic pressures induced by traditional pancake coils would be distributed on sheet metal non-uniformly, restricting the deformation of the sheet metal. In order to overcome this problem, the magnetic forces acting on the sheet metal and the uniform pressure electromagnetic actuator based on FEM （finite element method） were analyzed. According to the research results, metal. Areas around the distribution of the magnetic force is quite uniform in some extent of the sheet the actuator are expanded by the magnetic force, but the failure parts of the coil are mostly in areas close to the sheet metal.

关 键 词：电磁成形 数值模拟 匀压力线圈 线圈失效 洛伦兹力 

分 类 号：TM271[一般工业技术—材料科学与工程]