自动造型生产线附线运动平稳性研究

RESEARCH ON THE AUXILIARY LINE'S MOTION STABILITY OF AUTOMATIC MODEL PRODUCTION SYSTEM

机械化和自动化是铸造生产的重要课题,而作为机械系统的组成部分,附线的输送系统的运动功能和运动平稳性对生产过程影响较大。基于Solidworks软件建立了附线各部件的参数化三维几何模型,根据Hertz接触模型和恢复系数模型建立了附线系统的接触动力学模型。在ADAMS环境中,将液压系统简化为直线驱动单元和阻尼器,并根据系统的拓扑结构建立了附线的多体系统动力学模型。提出了临界阻尼系数和参数匹配的策略,并进行动力学仿真计算。仿真结果表明合理的阻尼系数能够保证台车运动平稳、冲击减小、并提高运动过程中和最终定位的位置精度。这对于提高生产效率和铸件质量具有重要意义。该方法与结果已应用于实际附线系统的运动功能调试。

The motion function and accuracy of auxiliary production of line affects the efficiency and quality of the cast production.The three dimensional geometry model of the auxiliary line was built,and based on Hertz and restitution contact law,the contact dynamic model of the line was set up.By virtue of ADAMS software,the hydraulic system was simplified as motion source and shock damper.Thus,the whole muhibody dynamics model was obtained and the simula- tion was carried out.The concept of critical damper coefficient and parameters matching was put forward.The simulation shows that the rational damper coefficient leads to stable motion,little shock and accurate motion position and these inde- xes are of vital importance to the cast production.The methods and results have been applied in debugging the real line's motion performance.