项目名称： 超声固接金属增材制造压电振子系统分析与设计

项目编号： No.51505161

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 机械、仪表工业

项目作者： 王寅

作者单位： 华侨大学

项目金额： 22万元

中文摘要： 超声固接增材制造技术利用在压力和超声同时作用下金属箔材间发生固接的现象，通过金属箔材逐层固接的方式实现高性能结构的制造，以其高效、低成本的特点在金属复合材料、微型金属蜂窝与三明治夹芯等复杂构件、功能集成器件的制造中具有独特优势。然而，由于固接产生的机制尚不明确，使压电振子的设计缺乏依据，目前使用的压电振子功率过大，阻碍了该技术的推广。项目组针对金属箔材在超声作用下的低温键合现象，通过箔材间力、热量作用过程与键合强度和微观组织结构的实验表征，研究压电振子振动能量和模式经箔材传递在界面上的响应特性，建立以固接性能和能量传递效率为目标的压电振子优化设计方法。通过压电振子参数化系统动力学模型的建立，结合振子振动模式、夹持方式、工艺参数以及波导表面物理性质和微观几何特性对固接性能及效率影响规律的实验研究，揭示压电振子的能量传递与转化规律，建立金属箔材逐层固接压电系统，支持增材制造核心装备的整体优化。

中文关键词： 金属增材制造；超声固接；压电振子；表面微观特性；动力学系统设计

英文摘要： Ultrasonic consolidation, which utilizes the consolidation phenomenon between two layers of metal foil under pressure and ultrasonic vibration, realizes fabrication of high quality structures layer by layer. Featured with green, efficient and low cost, it is a good solution for the manufacturing of metal composite materials, complex structure like micro metal bee nest and metal sandwich structure, function integrated devices etc. However, there is no enough guidance for design of piezoelectric vibrator because of uncertain of bonding mechanism, resulting too high power of piezoelectric vibrator needed to apply this method. This proposal covers the research on the low temperature bonding phenomenon by experimental investigation of vibration energy and mode transferred through metal foil. The design goal of both increasing quality and efficiency of ultrasonic consolidation will be set on the base of detail investigation of bonding mechanism while metal foil suffers ultrasonic vibration and the influence of manufacturing parameters on quality and efficiency of consolidation. By building the dynamic model of the bonding piezoelectric vibrator and analyzing the influence of clamping style, manufacturing parameters and micro characteristics on sonotrode surface on quality and efficiency of ultrasonic consolidation, the ruler of energy transformation and propagation will be found. The piezoelectric vibrator system for ultrasonic consolidation will be built. The results of this proposal will provide a new way for addictive manufacturing and offer guidance for the optimization of key device in addictive manufacturing equipment.

英文关键词： metal addictive manufacturing;ultrasonic consolidation;piezoelectric vibrator;surface micro characteristic ;dynamic system design