滚动直线导轨副滑块受载状况在线监测  

Research on Online Monitoring of the Load Condition of the Slider of Rolling Linear Guide Pair

作　　者：解孟冬 周严[1] 梁医[1] XIE Meng-dong;ZHOU Yan;LIANG Yi(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,南京210094

出　　处：《组合机床与自动化加工技术》2022年第8期75-78,83,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家科技重大专项(2019ZX0401001-005);国家自然科学基金青年基金(51405233)。

摘　　要：针对现有的滚动直线导轨副测量方法无法对滑块受载进行在线监测以获取真实工况数据的不足,提出了基于应变测量和LoRa无线传输相结合的测量和监控方法。首先,对滑块的应变状况及监测电路的布置位置进行了分析,提出了弹性梁模型定性地分析了滑块侧壁的应变状况,并用有限元分析加以验证;其次,基于惠斯通全桥和LoRa通信分别搭建了应变采集调理电路及无线传输电路;最后,进行了滑块应变的监测试验,对不同外载荷下的应变进行实时采集和传输,其结果显示搭建的系统能够获取不同载荷水平下的滑块侧壁等效应变,其值在400~600微应变的范围内。该研究可以通过实时采集并传输滑块应变来监测其真实工况受载,对实现数控机床的运行状态智能化监测具有重要意义。Aiming at the insufficiency of the existing measurement methods of rolling linear guide pair that cannot perform online monitoring of the load on the slider to obtain real working condition data,a measurement and monitoring method based on the combination of strain measurement and LoRa wireless transmission is proposed.Firstly,the strain condition of the slider and the arrangement position of the monitoring circuit were analyzed,and the elastic beam model was proposed to qualitatively analyze the strain condition of the slider sidewall,which was verified by finite element analysis.Secondly,strain acquisition and conditioning circuits and wireless transmission circuits were built with Wheatstone full bridge and LoRa Communication.Finally,a monitoring test of the slider strain was carried out to collect and transmit the strain under different external loads in real time.The results show that the system built can obtain the equivalent strain of the slider sidewall under different load levels,and its value ranges from 400 to 600 micro-strain.This research can monitor the real working conditions of the load by collecting and transmitting the strain of the slider in real time,which is of great significance to achieve the intelligent monitoring of the running status of CNC machine tools.

关 键 词：滚动直线导轨副 滑块受载 在线监测 弹性梁模型 应变测量 无线传输 

分 类 号：TH165[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]