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Application Comparison of the Circular and Elliptic Working Coil Used in Sheet Metal Electromagnetic Forming
Author(s): 
Pages: 281-285
Year: Issue:  3
Journal: JOURNAL OF BEIJING POLYTECHNIC UNIVERSITY

Keyword:  电磁成型线圈磁感应强度;
Abstract: 通过对椭圆形线电流产生的磁感应强度的推导,得出椭圆线圈所产生的磁感应强度的分布规律,并进一步得出圆线圈所产生的磁感应强度的分布规律,以及工件所受的磁场力的分布规律. 进行了两组实验:采用小孔模具,用圆形与椭圆形线圈进行成型,比较了两个工件的变形深度;采用盒形模具,用圆形与椭圆形线圈进行成型,比较了两个工件在中心部位的变形以及长度方向的变形充分程度. 结合磁感应强度的分布规律对实验结果进行分析,得出了两种线圈的适用情况:对于长形工件,采用椭圆线圈要优于圆形线圈;对中心部位变形要求较高的工件,应尽可能采用圆形线圈.
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