摘要
横梁的抗振性能是影响拱架式高速高精度贴片机贴装精度和效率的关键因素,并且对贴片机整机的稳定性也有重要影响。为提高抗振性能,以横梁为研究对象,提出结合刚体和柔性体多体动力学理论以及有限元的方法建立贴片机的刚柔耦合多体模型,对其进行多个贴装周期的仿真,分析基于各个不同截面结构的横梁条件下,安装在横梁上的贴装头的振动幅值变化和加速度变化,以评估横梁的抗振性能。分析结果表明,横梁的抗振性能对贴装头的稳定性有决定性的影响,改变横梁截面结构布局以及筋板厚度可对横梁的抗振性能进行优化,优化后,抗振性能显著提高。
The vibration resistance of beam is the main factor that affects the placement accuracy and efficiency of high-speed and high-precision arching-type placement machines, and also has an important impact on the stability of the whole machine. In order to improve the vibration resistance, a rigid-flexible coupling multi-body model of placement machine was put forward based on rigid and flexible conibined multi-body dynamics theory and finite element method, dynamic simulations are conducted in multiple placement cycle to analyze and study changes of the placement head vibration curve and acceleration under the conditions of different beams of various crass-section structure. Results show that the vibration performance of beam has a decisive influence on the stability of the placement head and could be optimized by changing its layout of crass-section structure as well as the thickness of the ribs, and significantly improved .after optimization.
出处
《机械设计与制造》
北大核心
2014年第6期31-34,共4页
Machinery Design & Manufacture
关键词
拱架式贴片机
横梁
抗振性能
刚柔耦合多体模型
结构设计
Arching-Type Placement Machines
Beam
Vibration Resistance
Rigid-Flexible Coupling Multi-Body Model
Structural Design
