摘要
目的掌握自激励式电磁铆接驱动力的作用方式,确定合理的工艺参数,探究铆钉变形规律。方法以2A10半圆头铆钉为研究对象,通过试验方法研究放电电压、放电电容及线圈结构对线圈放电电流和铆钉镦头变形的影响。结果自激励式电磁铆接驱动力源于两放电线圈电流的相互作用,两放电电流可分别进行独立控制。随着放电电压升高,线圈放电电流幅值增加,周期略有增加,铆钉镦头的变形量增加,相同放电能量下,放电电容值增加使放电电流幅值降低,周期增大,铆钉镦头变形量存在最大值;放电线圈匝数较多,导线宽度较小时,铆钉镦头变形量更大。结论自激励式电磁铆接是一种动力源可控的连接方法,为铆接驱动力的产生引入新方式,实现了铆接驱动力的主动控制,提高了控制的灵活性,其能量利用率较感应式高,为高强度大直径铆钉的成形提供一种有效的方式。铆钉变形是铆接驱动力幅值在一定时间下的作用效果,要综合考虑放电电流幅值与作用时间的关系。
The paper aims to learn the action mode of the driving force of the self-excited electromagnetic riveting, determine the reasonable process parameters and explore the law of rivet deformation. With 2 A10 semi-circular head rivet as the object of study, the effects of discharge voltage, discharge capacitance and coil structure on the coil discharge current and the deformation of the rivet head were studied by experimental methods. The self-excited electromagnetic riveting driving force originated from the interaction of the two discharge coil currents and the two discharge currents can be controlled independently. As the discharge voltage increased, the amplitude of the coil discharge current and the deformation of the rivet head increased, but the period increased slightly. In the same discharge energy, the increase of the discharge capacitance value reduced the amplitude of the discharge current, but the period increased. The deformation of rivet head had maximum value. The rivet head deformation was greater when the number of turns of the discharge coil was large and the wire width was small. Self-excited electromagnetic riveting is a controllable connection method of power source and introduces a new method for generating riveting driving force. It realizes active control of riveting driving force and improves control flexibility. Its energy utilization rate is higher than that of inductive electromagnetic riveting. It provides an effective way for forming high-strength large-diameter rivet. The deformation of rivet is the effect of riveting driving force amplitude at a certain time. The relationship between the amplitude of discharge current and the action time should be considered comprehensively.
作者
马天宇
龚成鹏
范治松
邓将华
MA Tian-yu;GONG Cheng-peng;FAN Zhi-song;DENG Jiang-hua(School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China)
出处
《精密成形工程》
2020年第3期137-145,共9页
Journal of Netshape Forming Engineering
基金
国家自然科学基金(51774097,51705081)
福建省自然科学基金(2018J05079)
福建省高校青年自然基金(JZ160417)
福建省高等学校新世纪优秀人才支持计划。
关键词
电磁铆接
自激励式
铆接驱动力
镦头变形
工艺参数
electromagnetic riveting
self-excitation
driving force of riveting
head deformation
process parameters
