间歇式高速直驱芯片分选机台的振动分析及优化  

Vibration analysis and optimization of intermittent high-speed direct-drive chip-sorting platform

作　　者：芦俊[1] 周芸[1] 潘小华 邓小龙[1] LU Jun;ZHOU Yun;PAN Xiaohua;DENG Xiaolong(Jiangsu Vocational College of Information Technology,Wuxi 214153,China)

机构地区：[1]江苏信息职业技术学院,无锡214153

出　　处：《现代制造工程》2022年第5期153-159,共7页Modern Manufacturing Engineering

基　　金：江苏省高校优秀科技创新科技团队基金资助项目(2019SJK07);江苏省高校自然科学基金项目(17KJB510019)。

摘　　要：芯片分选机台的动刚性对芯片分选过程中的平稳性至关重要。直驱电机驱动多工位转盘进行间歇式高速旋转运动时,施加于机台的反作用扭矩会引起机台振动。通过对该反作用激励进行频谱分析可知,激励的最大振幅集中于频率带0~50 Hz内。据此改进机台结构,优化加强支架的安装参数,使机台的固有频率避开反作用激励的最大振幅频率带。通过对优化前后机台的瞬态响应和试验数据进行对比,发现在机台固有频率大幅提高后,在同等反作用激励条件下,机台的振动加速度幅值、平均振动能量密度等均大幅减小,机台动态特性得到很大改善。The dynamic rigidity of the chip-sorting platform plays a vital role in the stability of the chip-sorting process.The direct-drive motor drives the multi-station turntable to rotate at a high speed periodically, and applies the reaction torque to the platform which will causes the platform to vibrate.The spectrum analysis of the reaction excitation was performed, the maximum amplitude of the excitation concentrated in the frequency band 0~50 Hz was obtained.Based on this, the platform structure was improved, and the installation dimension parameters of the reinforced bracket were optimized to make the natural frequency of the platform avoiding the maximum amplitude frequency band of the reaction excitation.By comparing the transient response and experimental data of the platform before and after the optimization, it is found that after the platform natural frequency is greatly increased, the vibration acceleration amplitude and average vibration energy density of the platform are greatly reduced under the same reaction excitation conditions, and the dynamic characteristics of the platform are greatly improved.

关 键 词：直驱电机 机台优化 固有频率 瞬态响应 加速度采集 

分 类 号：TH16[机械工程—机械制造及自动化] TH122