轻量化电磁铆枪研制与铆接工艺试验
发布时间：2019-02-14 08:50
【摘要】：电磁铆接技术是近些年来新兴的铆接技术,这种技术是通过储存在电容里的电能产生电流放电,放电的电流通过线圈,在线圈周围会产生变化的磁场,而驱动片处于变化的磁场中则会产生感应电动势,最后驱动片与线圈之间产生涡流斥力这样的原理来工作。电磁铆接的过程是瞬时冲击载荷打击铆钉,铆钉在遵照材料的动力学的特性发生了塑性变形,电磁铆枪则是这种工艺在实际生产中的应用设备。电磁铆接技术在国外已经被广泛的应用了,尤其是航空航天领域。国内电磁铆接技术由于发展较晚,仍处在探索阶段,因此设备仍存在铆接力不足,后坐力较大,铆枪笨重不方便等问题。本文首先介绍了电磁铆接技术在国内外的发展现状及电磁铆接设备在工作时的工作原理,分析了国内现阶段一些电磁铆枪存在的问题,并对已有的电磁铆枪进行分析总结,深入探究其特点及优势。将放电回路等效为双回路放电模型,通过理论分析计算出放电电流;通过提取磁感应强度而进行磁压力计算;分析应力波的传播方式;分析质量块弹簧阻尼系统的基本原理,从而设计后坐力减震系统。利用松散耦合的方法对铆枪工作的整个过程进行模拟,利用ANSYS数值模拟软件建立电磁场模型,通过建立电流密度进行加载分析。并将电磁场模型结果做为边界条件,在LS-DYNA模块中,建立铆钉变形分析模型及后坐力分析模型。对电磁力在驱动片上的分布及铆钉的变形规律进行分析。通过调整电压,电容,驱动片厚度等参数来实现电磁铆接的最优参数。为电磁铆枪的设计提供依据。使用solidwork软件对电磁铆枪进行三维造型,根据数值模拟和理论计算的结果设计并加工制造了轻量化电磁铆枪,经过试验调整铆枪的各个参数,使铆枪的重量和铆接力达到最优参数。组装后铆枪整体的质量为2.8 kg,操作人员可以手持加工;可成形Φ6mm高强度的铝合金铆钉;使用了压电石英力传感器对电磁铆枪的后坐力进行了测试,在能够打击Φ6mm高强度的铝合金铆钉的情况下,测量得铆枪的最大的平均冲量为3N·S,远远低于国家对于操作人员后坐力的要求标准的9.8 N·S,因此对操作人员的安全和健康不会产生任何影响。
[Abstract]:Electromagnetic riveting technology is a new riveting technology in recent years, which produces current discharge through electric energy stored in capacitors, discharge current through coils, and magnetic field around the ring. The driving plate in the changing magnetic field will produce inductive electromotive force, and finally drive the coil between the eddy current repulsion force to work. The process of electromagnetic riveting is to strike rivets with instantaneous impact load, and the rivets have plastic deformation in accordance with the dynamic characteristics of materials. Electromagnetic riveting gun is the application equipment of this process in actual production. Electromagnetic riveting technology has been widely used abroad, especially in the field of aerospace. Due to the late development of electromagnetic riveting technology in China, it is still in the exploration stage, so the equipment still has problems such as insufficient riveting force, large recoil force, heavy riveting gun and inconvenient riveting gun. This paper first introduces the development of electromagnetic riveting technology at home and abroad and the working principle of electromagnetic riveting equipment, analyzes the problems existing in some electromagnetic riveting guns at present in China, and analyzes and summarizes the existing electromagnetic riveting guns. Explore its characteristics and advantages in depth. The discharge circuit is equivalent to a double circuit discharge model, and the discharge current is calculated by theoretical analysis, the magnetic pressure is calculated by extracting the magnetic induction intensity, and the propagation mode of the stress wave is analyzed. The basic principle of mass block spring damping system is analyzed and the recoil damping system is designed. The whole process of riveting gun is simulated by loosely coupled method. The electromagnetic field model is established by using ANSYS numerical simulation software, and the load analysis is carried out by establishing current density. Taking the result of electromagnetic field model as boundary condition, the analysis model of rivet deformation and the model of recoil force are established in LS-DYNA module. The distribution of electromagnetic force on the driving plate and the deformation law of rivets are analyzed. The optimal parameters of electromagnetic riveting are realized by adjusting the parameters of voltage, capacitance and drive plate thickness. It provides the basis for the design of electromagnetic riveting gun. A lightweight electromagnetic riveting gun was designed and manufactured according to the results of numerical simulation and theoretical calculation by using solidwork software. The parameters of the riveting gun were adjusted by experiments. The weight and riveting force of riveting gun are optimized. The quality of the whole riveting gun after assembly is 2.8 kg,. The rivets of aluminum alloy with 桅 6mm high strength can be formed. The recoil force of electromagnetic riveting gun was measured by using piezoelectric quartz force sensor. The maximum average impulse of riveting gun was 3N S when 桅 6mm high strength aluminum alloy rivets could be hit. It is far below the national standard of 9.8 N Ss for operator recoil, so it will not have any effect on the safety and health of operator.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG938
，
本文编号：2422051
[Abstract]:Electromagnetic riveting technology is a new riveting technology in recent years, which produces current discharge through electric energy stored in capacitors, discharge current through coils, and magnetic field around the ring. The driving plate in the changing magnetic field will produce inductive electromotive force, and finally drive the coil between the eddy current repulsion force to work. The process of electromagnetic riveting is to strike rivets with instantaneous impact load, and the rivets have plastic deformation in accordance with the dynamic characteristics of materials. Electromagnetic riveting gun is the application equipment of this process in actual production. Electromagnetic riveting technology has been widely used abroad, especially in the field of aerospace. Due to the late development of electromagnetic riveting technology in China, it is still in the exploration stage, so the equipment still has problems such as insufficient riveting force, large recoil force, heavy riveting gun and inconvenient riveting gun. This paper first introduces the development of electromagnetic riveting technology at home and abroad and the working principle of electromagnetic riveting equipment, analyzes the problems existing in some electromagnetic riveting guns at present in China, and analyzes and summarizes the existing electromagnetic riveting guns. Explore its characteristics and advantages in depth. The discharge circuit is equivalent to a double circuit discharge model, and the discharge current is calculated by theoretical analysis, the magnetic pressure is calculated by extracting the magnetic induction intensity, and the propagation mode of the stress wave is analyzed. The basic principle of mass block spring damping system is analyzed and the recoil damping system is designed. The whole process of riveting gun is simulated by loosely coupled method. The electromagnetic field model is established by using ANSYS numerical simulation software, and the load analysis is carried out by establishing current density. Taking the result of electromagnetic field model as boundary condition, the analysis model of rivet deformation and the model of recoil force are established in LS-DYNA module. The distribution of electromagnetic force on the driving plate and the deformation law of rivets are analyzed. The optimal parameters of electromagnetic riveting are realized by adjusting the parameters of voltage, capacitance and drive plate thickness. It provides the basis for the design of electromagnetic riveting gun. A lightweight electromagnetic riveting gun was designed and manufactured according to the results of numerical simulation and theoretical calculation by using solidwork software. The parameters of the riveting gun were adjusted by experiments. The weight and riveting force of riveting gun are optimized. The quality of the whole riveting gun after assembly is 2.8 kg,. The rivets of aluminum alloy with 桅 6mm high strength can be formed. The recoil force of electromagnetic riveting gun was measured by using piezoelectric quartz force sensor. The maximum average impulse of riveting gun was 3N S when 桅 6mm high strength aluminum alloy rivets could be hit. It is far below the national standard of 9.8 N Ss for operator recoil, so it will not have any effect on the safety and health of operator.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG938
，
本文编号：2422051
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