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电磁铆接是一种将电磁能转化为机械能的铆接工艺。传统感应式低电压电磁铆接存在能量利用率低、难以解决高强度大直径铆钉和难成形材料铆钉的铆接等问题。基于自激励式电磁铆接技术,建立放电电流分析模型,通过数值分析与工艺试验探讨自激励式电磁铆接进行大直径铆钉成形的可行性。研究结果表明建立的电磁铆接放电电流分析模型可实现传统感应式和自激励式电磁铆接放电电流分析,分析结果与试验吻合较好;放电能量相同时,自激励式电磁铆接的涡流斥力峰值要远大于感应式的涡流斥力,能有效提高能量利用率,是实现大直径铆钉成形的有效方式;在放电电压为320V时,自激励式电磁铆接可实现直径为10mm的45号钢铆钉的成形,其变形以绝热剪切的方式进行。
Electromagnetic Riveting is a riveting process that converts electromagnetic energy into mechanical energy. The traditional inductive low-voltage electromagnetic riveting has the problems of low energy utilization, difficult to solve riveting of high-strength large-diameter rivets and hard-forming rivets, and the like. Based on the self-excitation electromagnetic riveting technology, the discharge current analysis model is established, and the feasibility of self-excitation type electromagnetic riveting for forming large diameter rivets is discussed through numerical analysis and process test. The results show that the established electromagnetic ripple discharge current analysis model can achieve the traditional inductive and self-excited electromagnetic riveting discharge current analysis, the analysis results agree well with the test; the same discharge energy, self-excited electromagnetic ripple repulsion eddy peak to be much larger The induced eddy repulsion can effectively improve the energy utilization rate, which is an effective way to realize the forming of large diameter rivets. When the discharge voltage is 320V, self-energizing electromagnetic riveting can form the 45 steel rivet with the diameter of 10mm, Deformation to adiabatic shear mode.